WO2012137871A1 - シート搬送装置 - Google Patents
シート搬送装置 Download PDFInfo
- Publication number
- WO2012137871A1 WO2012137871A1 PCT/JP2012/059377 JP2012059377W WO2012137871A1 WO 2012137871 A1 WO2012137871 A1 WO 2012137871A1 JP 2012059377 W JP2012059377 W JP 2012059377W WO 2012137871 A1 WO2012137871 A1 WO 2012137871A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sheet
- feeding
- receiving member
- rotating body
- sheet conveying
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H1/00—Supports or magazines for piles from which articles are to be separated
- B65H1/02—Supports or magazines for piles from which articles are to be separated adapted to support articles on edge
- B65H1/022—Supports or magazines for piles from which articles are to be separated adapted to support articles on edge with non-controlled means for advancing the pile to present the pile to the separating device, e.g. weights or spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/02—Separating articles from piles using friction forces between articles and separator
- B65H3/06—Rollers or like rotary separators
- B65H3/0676—Rollers or like rotary separators with two or more separator rollers in the feeding direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/02—Separating articles from piles using friction forces between articles and separator
- B65H3/06—Rollers or like rotary separators
- B65H3/0661—Rollers or like rotary separators for separating inclined-stacked articles with separator rollers above the stack
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
- B65H3/52—Friction retainers acting on under or rear side of article being separated
- B65H3/5246—Driven retainers, i.e. the motion thereof being provided by a dedicated drive
- B65H3/5253—Driven retainers, i.e. the motion thereof being provided by a dedicated drive the retainers positioned under articles separated from the top of the pile
- B65H3/5261—Retainers of the roller type, e.g. rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
- B65H3/56—Elements, e.g. scrapers, fingers, needles, brushes, acting on separated article or on edge of the pile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2402/00—Constructional details of the handling apparatus
- B65H2402/40—Details of frames, housings or mountings of the whole handling apparatus
- B65H2402/44—Housings
- B65H2402/441—Housings movable for facilitating access to area inside the housing, e.g. pivoting or sliding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2402/00—Constructional details of the handling apparatus
- B65H2402/40—Details of frames, housings or mountings of the whole handling apparatus
- B65H2402/46—Table apparatus
Definitions
- the present invention relates to a sheet conveying apparatus that conveys a sheet installed between a sheet receiving member and a feeding rotating body.
- document information reading devices such as scanners, and image forming devices such as copiers, printers, facsimiles, or multifunction peripherals thereof each include a sheet conveying device that conveys a sheet to an information reading unit or an image forming unit.
- the information reading unit is a part provided with a sensor that reads image information or magnetic information on a sheet such as an image sensor.
- the image forming unit is a part that forms an image on a sheet such as an ink dot method, an electrophotographic method, or an electrostatic recording method.
- the sheet conveying apparatus includes a tray on which the sheet is placed and a feeding roller disposed so as to face the tray, and feeds the sheet on the tray into the apparatus by the feeding roller.
- a middle plate sheet receiving member which is a part of the tray and a feeding roller.
- a spring that urges the intermediate plate that is rotatably supported toward the feeding roller is provided, and the sheet is sandwiched between the middle plate and the feeding roller by the urging force of the spring.
- a separation roller for separating the sheets one by one from the sheet bundle is provided at a position facing the feeding roller downstream of the intermediate plate in the sheet conveyance direction. The separation roller rotates in the reverse direction to the feeding roller, and moves the sheet in the reverse direction of the sheet conveyance direction (see Patent Document 1).
- the present invention provides a sheet receiving member for placing a sheet, a feeding rotating body for feeding a sheet placed on the sheet receiving member, and a separation member for separating the sheet from a sheet bundle on the sheet receiving member.
- the at least one member of the feeding rotating body and the separation member overlaps with the width direction orthogonal to the sheet conveying direction and is disposed so as to reach a position deviated from the one member in the width direction.
- a restricting portion for restricting a leading end position of the sheet placed on the sheet receiving member.
- the sheet receiving member is movably supported by a housing, the separation member abuts on the feeding rotating body to form a nip portion, and the sheet receiving member is used as the sheet receiving member.
- a moving portion that moves between a feeding position where the sheet placed on the feeding rotary body abuts on the feeding rotary body and a standby position farther from the feeding rotary body than the feeding position; and the sheet receiver
- the restricting portion includes a restricting member that overlaps with the feeding rotating body in a width direction orthogonal to the sheet conveying direction and protrudes from the feeding rotating body to a position deviated in the width direction from the abutting portion.
- the separation member is disposed downstream of the sheet receiving member in the sheet conveying direction by the feeding rotating body with a gap between the sheet receiving member and a direction opposite to the sheet conveying direction.
- a separation rotating body that separates the sheets one by one from the sheet bundle on the sheet receiving member, and the restricting portion passes through the gap from the downstream end in the sheet conveying direction of the sheet receiving member, and separates the separation
- a protruding member that overlaps with the rotating body in a width direction orthogonal to the sheet conveying direction and protrudes from the separating rotating body to a position deviated in the width direction.
- the sheet transportability can be improved.
- the restricting portion has a restricting member that protrudes from the abutting portion to a position that overlaps with the feeding rotating body in the width direction
- the sheet bundle is moved to the nip portion by the abutting portion and the restricting member at the standby position. Since the entry is restricted, even if the sheet bundle placed on the sheet receiving member is pushed in, it is difficult to enter the nip portion with a part of the sheet bundle overlapping. Further, since the sheet is fed to the nip portion while being bent in contact with the regulating member, the sheet can be easily separated from the sheet bundle. For this reason, it is possible to reduce double feeding of sheets without strictly regulating the gap between the abutting portion and the feeding rotating body.
- the apparatus since the regulating member only protrudes from the tip of the abutting portion and overlaps the feeding rotating body in the width direction, the apparatus does not increase in size, and the abutting portion and the feeding rotating body Coupled with the fact that there is no need to strictly regulate the gap, it is possible to prevent an increase in cost. As a result, a structure capable of reducing double feeding of sheets can be obtained at low cost without increasing the size of the apparatus.
- the protruding member of the restricting portion passes through the gap from the downstream end of the sheet receiving member in the sheet conveying direction, overlaps with the separation rotating body in the width direction, and deviates from the separation rotating body in the width direction. If the sheet is formed up to the position, a part of the sheet can be prevented from entering the gap. As a result, the sheet can be prevented from being jammed or skewed, and the sheet can be conveyed stably.
- FIG. 1 is a schematic cross-sectional view of a document information reading apparatus including a sheet conveying device according to a first embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view illustrating a part of FIG. 1 in an enlarged manner.
- FIG. 4 which shows the state which mounted the sheet
- the structure which moves an intermediate plate is extracted, (a) is a perspective view which shows a feeding position, (b) shows a standby position, respectively.
- FIG. 3 is a schematic cross-sectional view illustrating another example of a sheet discharge form of the document information reading apparatus in FIG. 1.
- FIG. 3 is a schematic cross-sectional view illustrating another example of a sheet discharge form of the document information reading apparatus in FIG. 1.
- FIG. 2 is a schematic cross-sectional view illustrating an operation of a sheet pressing member of the document information reading apparatus in FIG. 1.
- FIG. 10 is a perspective view of a document information reading apparatus provided with a sheet conveying apparatus according to a fifth embodiment of the present invention with a cover portion removed.
- the schematic plan view which expands and shows an intermediate
- FIG. 2 is an enlarged schematic cross-sectional view showing a part corresponding to a part of FIG. 1.
- FIG. 16 which shows the state which mounted the sheet
- FIG. 15 which shows another example of a separation roller.
- FIG. 5 is a half sectional view of a schematic configuration showing another example of a configuration for driving a separation roller.
- FIG. 10 is an enlarged schematic cross-sectional view illustrating a part corresponding to a part of FIG. 1 in a sheet conveying apparatus according to a sixth embodiment of the present invention.
- a document information reading device (hereinafter referred to as a scanner) 1 includes a sheet feeding unit 2 that is a sheet conveying device, an information reading unit 3 that reads information on a sheet, and a discharge unit 4 that discharges a sheet. . Then, image information on the sheet fed from the sheet feeding unit 2 is read by the information reading unit 3, and the sheet from which the information is read is discharged from the discharge unit 4. Further, the scanner 1 has a structure in which the sheet conveyance angle is conveyed close to the vertical direction in order to reduce the installation area of the apparatus.
- a sheet conveying apparatus as a sheet feeding unit as described above has a tray on which a sheet is placed and a feeding roller arranged to face the tray, and the sheet on the tray is placed in the apparatus by the feeding roller. To feed.
- the sheet bundle is placed on the tray, if the sheet bundle is pushed too far into the nip portion between the feeding roller and the separation roller, the sheet bundle overlaps with the nip portion. It becomes easy to enter and double feed.
- a structure in which a swingable return lever is provided on the upstream side of the nip portion in the sheet conveying direction is known.
- the return lever when the sheet bundle is placed on the tray, the return lever is swung so as to close the space between the tray and the nip portion, and the leading end of the sheet bundle is brought into contact with the return lever. The sheet bundle is prevented from entering the nip portion with a part of the sheet bundle overlapping.
- the return lever when the sheet is conveyed to the nip portion, the return lever is swung so as to be retracted from between the tray and the nip portion, thereby allowing the sheet to pass (see JP-A-10-181921). ).
- a separation guide is provided on the upstream side of the nip between the feeding roller and the separation roller in the sheet conveying direction so as to have a predetermined gap with the feeding roller.
- the present embodiment realizes a structure capable of reducing the double feeding of sheets at a low cost without increasing the size of the apparatus. This will be specifically described below.
- the sheet feeding unit 2 is disposed on the upper part of the apparatus main body 11 of the scanner 1 and is disposed opposite to the feeding roller 22 that is a feeding rotating body, the tray 21 on which a sheet is placed, It has the separation roller 23 which is a separation member, and the roller 24 which is a low friction member.
- the tray 21 is fixed to a main body (housing) 11a of the apparatus main body 11 and is rotatable (movable) with respect to the main body 11a. ) Is supported by a middle plate 21b which is a sheet receiving member.
- the tray 21 has an inclination angle close to the vertical direction, and is arranged so that its own weight acts in a direction in which a sheet on the tray 21 approaches a separation roller 23 (described later) when the apparatus is in use.
- the fixed plate 21a is provided so as to extend obliquely upward from the paper feed port 12 (FIG. 1) provided in the upper part of the apparatus main body 11.
- a slide member 21c is provided on the surface on which the sheet of the fixed plate 21a is placed so as to be movable in the width direction (front and back directions in FIGS. 1, 4 and 5). Then, the slide member 21c is moved according to the sheet size so that the position of the placed sheet in the width direction can be regulated.
- a plate-like rotation support portion 21d having a narrow width is provided at the upper end portion of the fixed plate 21a so that the region for supporting the sheet is variable.
- the rotation support portion 21d is rotatably supported at the intermediate portion in the width direction of the upper end portion of the fixed plate 21a.
- the rotation support portion 21d is rotated so as to extend obliquely upward from the upper end portion of the fixed plate 21a.
- the apparatus can be made compact by rotating and folding the sheet 90 degrees from the state shown in FIG.
- the intermediate plate 21b is a plate-like member made of a steel plate or a synthetic resin, and is disposed downstream of the fixing plate 21a in the sheet conveying direction by the feeding roller 22 (obliquely downward in FIGS. 4 and 5).
- the protrusion part 21e (FIG.4 and FIG.5) provided in the width direction both ends is rotatably supported by the apparatus main body 11 by fitting in the support hole provided in the apparatus main body 11.
- FIG. The protrusion 21e and the support hole constitute a rotation support portion.
- a spring 51 that is a sheet receiving member urging means is disposed between the intermediate plate 21 b and the apparatus main body 11. Then, a spring 51 is elastically brought into contact with the back surface opposite to the front surface side on which the sheet of the intermediate plate 21b is placed, and the intermediate plate 21b is directed toward the feeding roller 22 by the spring 51 as shown in FIG. Is energized.
- the urging force of the spring 51 is determined in terms of design so that the sheet can be conveyed with a roller 24 and a feeding roller 22 (described later) provided on the intermediate plate 21b sandwiched.
- Such an intermediate plate 21b is rotated (moved) with respect to the apparatus main body 11 around the rotation support portion by an intermediate plate moving device 50 which is a moving portion described later. Specifically, the intermediate plate 21b approaches the feeding roller 22 and can feed a sheet at a feeding position where the sheet can be conveyed by the feeding roller 22 and away from the feeding roller 22 than the feeding position. It is possible to move between different standby positions.
- the sheet placed on the tray 21 is brought into contact with (pressed on) the feeding roller 22.
- the sheet can be conveyed by the feeding roller 22 while the sheet is sandwiched between the intermediate plate 21 b and the feeding roller 22.
- a gap is formed between the intermediate plate 21 b and the feeding roller 22, and the sheet (or sheet bundle) S can be placed on the tray 21.
- the reason why the intermediate plate 21b is moved to the standby position in this way to provide a gap with the feeding roller 22 is as follows. That is, when the intermediate plate 21b is urged toward the feeding roller 22, when the sheet (or sheet bundle) S is placed on the tray 21, the leading edge of the sheet is fed with the intermediate plate 21b. It is difficult to enter between the feed rollers 22. Therefore, as in the present embodiment, the intermediate plate 21 b is lowered so as to open a gap between the intermediate plate 21 b and the feeding roller 22. Thus, when the sheet (or sheet bundle) S is placed on the tray 21, the leading edge of the sheet can easily enter between the intermediate plate 21 b and the feeding roller 22, and the sheet is conveyed by the feeding roller 22. It can be done smoothly.
- the feeding roller 22 is provided in the cover portion 11b of the apparatus main body 11, and is rotationally driven by a motor that is a driving source (not shown). Then, the sheet abuts on the sheet on the intermediate plate 21 b (on the sheet receiving member) and feeds (conveys) the sheet toward the information reading unit 3. In the case of this embodiment, the feeding roller 22 is disposed at a position facing the central portion in the width direction of the tray 21.
- a separation roller 23 is provided at a position facing the feeding roller 22 downstream of the tray 21 in the sheet conveying direction by the feeding roller 22.
- the separation roller 23 is disposed so as to contact the feeding roller 22 and form a nip portion N (see FIGS. 4 and 5).
- the separation roller 23 configured in this manner is supported so as to be movable (swingable) in the direction of moving toward and away from the feed roller 22 and is urged in a direction toward the feed roller 22 by a spring (not shown). . Further, the separation roller 23 is rotationally driven in a direction opposite to the rotation direction (sheet conveying direction) of the feeding roller 22 by a motor M (FIG. 1) as a drive source.
- a motor M FIG. 1
- the separation roller 23 is provided with a torque limiter so that power transmission from the motor can be cut off when a torque exceeding a predetermined value is applied.
- the positional relationship between the feeding roller 22 and the separation roller 23 in the sheet conveyance direction is a position where the feeding roller 22 is shifted from the separation roller 23 upstream in the sheet conveyance direction by the feeding roller 22. This makes it easy to pick up the sheet on the tray 21.
- a roller 24 that is a low friction member and a rotating member is rotatably supported at the front end portion of the intermediate plate 21b (the lower end portion in FIGS. 5 and 6 and the downstream end portion in the sheet conveyance direction).
- the roller 24 is disposed at a position facing the feeding roller 22 on the intermediate plate 21b side (sheet receiving member side) so that the sheet can be sandwiched (nip) with the feeding roller 22.
- the roller 24 is rotatably supported with respect to the intermediate plate 21b so that the coefficient of friction is lower than the portion of the intermediate plate 21b other than the position where the roller 24 is installed (other than the opposed position). That is, the roller 24 is made of, for example, a synthetic resin having a small surface friction coefficient such as polyacetal (POM). As shown in detail in FIG. 3, the small diameter portions 24 b are provided at both ends of the cylindrical large diameter portion 24 a. It is integrally formed. And the small diameter part 24b (rotating shaft) of these both ends is rotatably supported by the support parts 24c and 24d formed in the intermediate plate 21b. Therefore, the roller 24 is rotatable around this rotation axis.
- POM polyacetal
- the support portions 24c and 24d of the intermediate plate 21b are also made of a synthetic resin having a small surface friction coefficient, such as POM. Therefore, the small diameter portion 24b rotates with a low frictional resistance with respect to the support portions 24c and 24d.
- the small-diameter portion 24b that is a rotation shaft is disposed in the width direction that intersects the sheet conveyance direction by the feeding roller 22 (orthogonal in the present embodiment). For this reason, the roller 24 rotates in a direction along the sheet conveyance direction when the sheet is conveyed.
- one support portion 24c supports the small diameter portion 24b with a pair of claws.
- a pair of claws are projected from the surface of the intermediate plate 21b toward the feed roller 22, and the width of the gap between the tips of the pair of claws is slightly smaller than the diameter of the small diameter portion 24b.
- a cylindrical gap slightly larger than the diameter of the small diameter portion 24b is formed in the middle portion of the pair of claws.
- the other support portion 24d is a cylindrical portion having an inner diameter slightly larger than the diameter of the small diameter portion 24b. And the small diameter part 24b is supported by inserting the small diameter part 24b in this cylindrical part.
- the roller 24 When mounting the roller 24 on the support portions 24c and 24d, first, the roller 24 is inclined with respect to the middle plate 21b, and the small diameter portion 24b on one side is inserted into the other support portion 24d while the roller 24 is Tilt in a direction parallel to the surface of the plate 21b. And the small diameter part 24b of an other side is pressed on the clearance gap part of the front-end
- the roller 24 thus supported comes into contact with the feeding roller 22 in a state where the intermediate plate 21b is moved to the feeding position. For this reason, the force which acts on the roller 24 is a direction which presses the small diameter part 24b against the one support part 24c. Therefore, even if one support portion 24c is configured as described above, the roller 24 does not come off during use.
- the other support portion 24d may have the same configuration as the support portion 24c.
- the above-described roller 24 does not have to have a small friction coefficient on the surface itself. That is, any rotating member that rotates like a roller and has a low coefficient of friction with the counterpart member may be used. Therefore, the above-mentioned roller 24 may be a rubber roller in which rubber is wound around a core metal, for example. If the core metal is supported rotatably with respect to the intermediate plate 21b, and the frictional resistance of the rotation support portion is small, the friction coefficient between the rubber roller and the mating member is small as a result.
- the roller 24 is used as the rotating member, but the shape of the rotating member is not limited.
- a ball shape may be provided.
- a protrusion or a groove may be provided on the surface.
- the roller 24 at the tip of the intermediate plate 21b, the frictional force with the sheet during the conveyance by the feeding roller 22 can be reduced, and the noise generated during the conveyance of the sheet can be reduced.
- sheet conveyance performance can be improved.
- the sheet bundle on the intermediate plate 21b can be easily returned. That is, since the frictional resistance between the sheet bundle and the middle plate 21b can be reduced, the sheet bundle can be easily returned.
- the spring 51 has a minimum pressing force that can pick up the sheet so that the sheet can be easily returned.
- the abutting portion 61 when the intermediate plate 21b is moved to the standby position, there is an abutting portion 61 with which the downstream end (tip) of the sheet S placed on the intermediate plate 21b comes into contact. That is, the abutting portion 61 appears by moving the intermediate plate 21b from the feeding position to the standby position, and the abutting portion 61 abuts the leading end portion of the bundle of sheets S against the abutting portion 61, thereby abutting against the intermediate plate 21b. The feeding posture of the sheet S is maintained at the corner with the portion 61.
- the abutting portion 61 serves to prevent the sheet placed on the intermediate plate 21b at the standby position from moving (entering) to the feeding roller 22 side (conveying member side). is there.
- such abutment portion 61 is formed integrally with the main body (housing) 11 a of the apparatus main body 11 or is fixed to the main body 11 a.
- the abutting portion 61 is substantially orthogonal to the upper surface when the intermediate plate 21b exists in the standby position between the intermediate plate 21b and the nip portion N between the feeding roller 22 and the separation roller 23. It is installed as follows. Further, when the nip portion N is viewed from above the intermediate plate 21b, when the intermediate plate 21b is present at the feeding position, the abutting portion 61 is hidden by the intermediate plate 21b, and the intermediate plate 21b moves to the standby position. By doing so, the butting portion 61 is exposed (appears).
- the abutting portion 61 is hidden behind the intermediate plate 21b without interfering with the sheet S placed on the intermediate plate 21b, and the feeding roller 22 moves the sheet S to the feeding roller 22 side.
- the intermediate plate 21b exists at the standby position, the abutting portion 61 is exposed downstream in the sheet conveyance direction of the intermediate plate 21b, and the downstream end in the conveyance direction of the sheet S placed on the intermediate plate 21b protrudes. Abuts against the abutting portion 61. Then, alignment of the sheet bundle is performed, and positioning of the sheet S placed on the tray 21 that is installed at an inclination as described above is achieved.
- the abutting portion 61 is partially on the opening side of the conveyance path 13 so as to restrict the entry of the sheet S placed on the intermediate plate 21b into the conveyance path (opening).
- a restricting member 60 that is also a restricting portion that protrudes from the surface is provided.
- the regulating member 60 is provided corresponding to both sides of the nip portion N formed by the feeding roller 22 and the separation roller 23.
- the regulating member 60 is superposed in the width direction perpendicular to the sheet conveying direction from the abutting portion 61 and the feeding roller 22 which is at least one of the feeding rotating body and the separating member, and It is provided so as to protrude from the feed roller 22 to a position deviated in the width direction (at a position not in contact with the feed roller).
- the regulating member 60 partially overlaps the feeding roller 22 when viewed from the axial direction of the feeding roller 22. That is, the regulating member 60 and the feeding roller 22 are overlapped.
- the regulating member 60 arranged in this way regulates the position of the leading edge of the sheet placed on the intermediate plate 21b.
- the surface on which the sheet placed on the middle plate 21b of the regulating member 60 abuts is formed continuously with the surface on which the sheet placed on the middle plate 21b of the abutment portion 61 abuts. ing.
- the abutting surface that abuts the sheet S of the abutting portion 61 and the upper surface of the regulating member 60 are provided to form a continuous surface. Therefore, the upper surface of the regulating member 60 is a surface that partially receives the leading edge of the sheet S.
- the sheet bundle placed on the intermediate plate 21b at the standby position is strongly pushed into the nip portion N, the sheet bundle is restricted from entering the nip portion N by the abutment portion 61 and the regulating member 60 ( Suppressed).
- the sheet conveyed by the feeding roller 22 at the feeding position is sent to the nip portion N while being bent by contacting the regulating member 60.
- the shape or size of the regulating member 60 is not particularly limited as long as it does not substantially impede entry into the nip portion N when the sheet S is fed.
- the regulating member 60 is constituted by a pair of regulating elements 60a. And the surface which mutually opposes regarding the width direction of a pair of control element 60a is formed so that it may incline in the direction where a space
- the opposing side of the elements constituting the restricting member 60 that is, the end side close to the nip portion N may be cut out and inclined.
- the opening of the conveyance path 13, that is, the sheet S is formed between the end portion of the abutting portion 61 in which the restriction member 60 is formed and the apparatus main body facing the end portion. It constitutes the insertion slot. And the edge part by the side of the conveyance path of the abutting part 61 becomes the inclined surface (taper surface) thru
- the regulating member 60 has a pair of regulating elements 60a provided to extend the abutting portion 61 with a predetermined interval in the width direction, and the pair of regulating elements 60a are separated as shown in FIG.
- the rollers 23 are arranged on both sides in the width direction. These regulating elements 60a are arranged at an equal distance from the separation roller 23, and the surface on the side of the intermediate plate 21b is formed so as to be substantially orthogonal to the upper surface when the intermediate plate 21b is in the standby position.
- Such a restricting member 60 is also disposed between the intermediate plate 21 b and the nip portion N.
- the sheet bundle placed on the intermediate plate 21b at the standby position comes into contact with the abutting portion 61 and the regulating member 60 and is further restricted from entering the nip portion N side.
- the restricting member 60 may be formed integrally with the abutting portion 61, or a separate member may be fixed.
- the regulating member 60 is preferably made of a material that is not easily worn, for example, a POM material.
- the sheet is conveyed so that the center of the sheet coincides with the center of the tray 21. For this reason, the position in the width direction of the pair of restricting elements 60 a is arranged at an equal distance from the center with respect to the center of the tray 21.
- the predetermined distance between the pair of regulating elements 60a is, for example, a standard ISO / IEC 7810 ID-1 type card (length in the sheet conveying direction is 53.98 mm, length in the width direction is 85.60 mm, thickness is 0.8 mm). 76 mm). That is, the pair of regulating elements 60a is formed to be spaced apart in the width direction by 85.60 mm or more. On the other hand, the predetermined interval is made smaller than the width of the smallest sheet among the thin sheets. The predetermined interval is appropriately determined in design according to the size of a card having a thickness larger than that of a normal sheet such as plain paper and the size of a thin sheet such as plain paper to be used. In addition, the pair of regulating elements 60a may be movable in the width direction, and the predetermined interval may be variable.
- the distance between the abutting portion 61 and the feeding roller 22 is, for example, larger than the card thickness of 0.76 mm.
- This interval is also appropriately designed in accordance with the size of a card having a thickness larger than that of a normal sheet such as plain paper.
- a sheet having a width equal to or larger than a predetermined interval is brought into contact with the pair of restricting elements 60a to guide the sheet to the nip portion while being bent. That is, a sheet having a small thickness but a large width, such as plain paper, is passed over the pair of regulating elements 60a.
- the pair of regulating elements 60 a protrudes until they overlap with the feeding roller 22, so that the sheet is fed to the nip portion N in a bent state by contacting the regulating member 60. That is, the both sides in the width direction of the sheet are conveyed to the nip portion while being lifted by the pair of regulating elements 60a.
- the length of the overlapping portion of the regulating member 60 and the feeding roller 22 in the width direction is such that the sheet can pass over the regulating member 60 while being bent.
- the sheet is easily separated from other sheets by bending, but the overlap amount is increased to such an extent that the separation of the sheet can be secured.
- the overlap amount is set so that the sheet does not jam.
- the apparatus main body 11 is separable into the main body part 11a and the cover part 11b with a conveyance path 13 through which the sheet is conveyed in the apparatus main body 11 as a boundary.
- the main body 11a is provided with the tray 21 and the separation roller 23 described above, and the feeding roller 22 is supported by the cover 11b.
- the cover part 11b is rotatable with respect to the main body part 11a around the lower end portion of the main body part 11a. When the cover portion 11b is rotated, the conveyance path 13 is exposed (opened), and a sheet jammed in the conveyance path 13 can be removed.
- the feeding roller 22 contacts the separation roller 23, and the separation roller 23 sinks in the direction opposite to the spring biasing direction (moves away from the feeding roller 22).
- the feeding roller 22 and the separation roller 23 are in elastic contact with each other.
- FIG. 6 will be used with reference to FIG. 6 for the intermediate plate moving device 50 that is a moving unit that moves the intermediate plate 21 b that is the sheet receiving member between the feeding position and the standby position.
- the intermediate plate moving device 50 includes a spring 51 as an urging means, a drive gear 52 as a drive side member, a rotation shaft 53 as a movement side member, an engagement member 54 fixed to the intermediate plate 21b, And a one-way clutch 55 which is power connection / disconnection means.
- the spring 51 is disposed between the intermediate plate 21b and the support plate 63 of the fixing member 62, and urges the intermediate plate 21b in a direction to move to the feeding position.
- the drive gear 52 is connected to a motor (not shown) as drive means via a gear train 52a.
- the rotation shaft 53 is disposed below the middle plate 21 b (on the support plate portion 63 side) in the width direction substantially orthogonal to the sheet conveying direction, and moves the middle plate 21 b via the engagement member 54.
- an engaging protrusion 53a is formed at the tip of the rotating shaft 53 so as to protrude from the outer peripheral surface.
- the engaging protrusion 53a engages with an engaged protrusion 54a protruding in the width direction from an engaging member 54 fixed to the intermediate plate 21b. Then, when the rotation shaft 53 rotates in the direction indicated by the arrow B in FIG. 6B, the intermediate plate 21b moves to the standby position due to the engagement between the engagement protrusion 53a and the engagement protrusion 54a. I am doing so.
- the one-way clutch 55 is disposed between the drive gear 52 and the rotating shaft 53, and transmits and disconnects power. That is, when the drive gear 52 rotates in the direction of arrow A in FIG. 6A, the one-way clutch 55 cuts power between the drive gear 52 and the rotation shaft 53. On the other hand, when the drive gear 52 rotates in the direction of arrow B in FIG. 6B, the one-way clutch 55 transmits power from the drive gear 52 to the rotation shaft 53.
- the intermediate plate moving device 50 configured as described above, when the motor is driven in the forward direction, as shown in FIG. 6A, the drive gear 52 is rotated in the direction of arrow A through the gear train 52a.
- the one-way clutch 55 cuts power between the drive gear 52 and the rotating shaft 53.
- the intermediate plate 21b moves toward the feeding position by the urging force of the spring 51.
- the intermediate plate 21b rotates in a direction approaching the feeding roller 22 with the rotation support portion as a center.
- the information reading unit 3 is disposed in an intermediate portion of the apparatus main body 11 in the sheet conveyance direction, and includes a roller pair 31, a registration sensor 32, and image sensors 33a and 33b.
- the roller pair 31 includes a driving roller 31a and a driven roller 31b.
- the driving roller 31a is provided on the main body 11a
- the driven roller 31b is provided on the cover 11b.
- the driving roller 31a is rotationally driven by a motor which is a driving source (not shown), and the driven roller 31b rotates following the driving roller 31a.
- a roller pair 31 conveys the sheet conveyed from the sheet feeding unit 2 in the same direction as the conveying direction by the feeding roller 22.
- the registration sensor 32 detects the leading edge and the trailing edge of the sheet conveyed by the roller pair 31.
- Examples of such a registration sensor 32 include a photo sensor provided with a light emitting part and a light receiving part, and a sensor that detects the operation of a lever.
- the photo sensor detects the passage of the sheet when the sheet blocks light, and the detection by the lever detects the passage of the sheet when the sheet tilts the lever.
- a photo sensor is used.
- Image sensors 33a and 33b are each a CIS (contact image sensor) and read information on the front and back surfaces of the sheet. That is, one image sensor 33a is provided on the main body 11a side, and the other image sensor 33b is provided on the cover 11b side.
- the surface from which the information of each image sensor 33a, 33b is read is the conveyance path 13 side, and information on both sides of the sheet passing through the conveyance path 13 is read by the image sensors 33a, 33b.
- the information read in the present embodiment is information on an image formed on the front surface or the back surface of the sheet.
- the discharge unit 4 is disposed downstream of the apparatus main body 11 in the sheet conveyance direction, and has a U-shaped conveyance path 41 continuous with the conveyance path 13, a feed roller pair 42, a discharge roller pair 43, a discharge tray 44, A sheet holding member 45.
- the U-shaped conveyance path 41 is a conveyance path through which a U-shaped sheet is conveyed.
- Such a U-shaped conveyance path 41 includes a U-shaped curved surface portion 41 a formed on the lower surface of the cover portion 11 b and a U-shaped curved member 41 b connected to the apparatus main body 11 by a hinge 46. .
- the bending member 41 b can rotate around the hinge 46. For this reason, when a sheet jams in the U-shaped conveyance path 41, the bending process can be performed by rotating the bending member 41b to expose the U-shaped conveyance path 41.
- the feeding roller pair 42 is an inlet that enters the U-shaped conveyance path 41 from the conveyance path 13 of the apparatus main body 11 and is disposed upstream of the hinge 46 in the sheet conveyance direction.
- the feed roller pair 42 is composed of a driving roller and a driven roller. One roller is provided on the main body portion 11a and the other roller is provided on the cover portion 11b. . Then, the sheet conveyed from the information reading unit 3 is conveyed to the U-shaped conveyance path 41.
- the paper discharge roller pair 43 is provided at the exit of the U-shaped conveyance path 41 and discharges the sheet from the U-shaped conveyance path 41.
- the paper discharge roller pair 43 is also composed of a driving roller and a driven roller, and one roller is provided on the cover portion 11b and the other roller is provided on the bending member 41b.
- the paper discharge tray 44 is formed on the surface of the cover portion 11b opposite to the main body portion 11a, and stacks the sheets discharged from the paper discharge roller pair 43.
- the sheet discharge tray 44 includes an inclined surface 44a inclined in the horizontal direction, and a support surface 44b restricted so as to be bent obliquely upward from the lower end edge of the inclined surface 44a.
- the leading end of the support surface 44 b exists in the vicinity of the exit of the discharge roller pair 43.
- the sheet discharged from the discharge roller pair 43 jumps out toward the inclined surface 44a and is placed so as to overlap the inclined surface 44a while the lower end edge is supported by the supporting surface 44b.
- the sheet holding member 45 holds the sheets stacked on the paper discharge tray 44 so that the sheets do not fall from the paper discharge tray 44 due to the influence of disturbance or the like.
- a sheet restraining member 45 is provided so as to extend almost tangentially from the tip of the bending member 41b, and faces the inclined surface 44a of the sheet discharge tray 44 with the bending member 41b closed as shown in FIG. To do. As a result, the sheet discharged to the sheet discharge tray 44 is sandwiched between the inclined surface 44a and the sheet holding member 45, and is prevented from inadvertently dropping.
- the sheet pressing member 45 is configured to be extendable. Therefore, when the sheet size is small, the length is shortened as shown in FIG. 8A, and when the sheet size is large, the length is lengthened as shown in FIG. 8B. Therefore, it can be adjusted according to the sheet size.
- the sheet can be discharged even when the bending member 41b is rotated and the U-shaped conveyance path 41 is exposed.
- the feeding roller pair 42 serves as a paper discharge roller pair
- the sheet holding member 45 serves as a paper discharge tray.
- the scanner 1 of the present embodiment can change the sheet discharge method. For example, normally, if the sheet is discharged in the state shown in FIG. 1, it is more compact than the state shown in FIG. 7, and the installation space can be reduced. On the other hand, for example, when it is not desired to pass the sheet through a curved path such as the U-shaped conveyance path 41, the sheet is discharged in the state shown in FIG.
- a sheet (or sheet bundle) for reading information is placed on the tray 21.
- the intermediate plate 21 b is sunk, the leading edge of the sheet S enters between the intermediate plate 21 b and the feeding roller 22, and the sheet S The tip of the butt comes into contact with the abutting portion 61.
- the intermediate plate 21b is urged by the spring 51 by the drive of the intermediate plate moving device 50, and the sheet The tip of the sheet is sandwiched between the intermediate plate 21 b and the feeding roller 22.
- the roller 24 supported at the front end of the intermediate plate 21 b comes into contact with the back surface of the sheet (the lowermost sheet in the case of a sheet bundle), and the sheet is sandwiched between the roller 24 and the feeding roller 22. .
- a sheet larger than a predetermined interval between the pair of restricting elements 60a rides on the pair of restricting elements 60a on both sides in the width direction and is bent into the nip portion N. Be transported. On the other hand, a sheet smaller than the predetermined interval passes between the pair of restricting elements 60a and is conveyed to the nip portion N.
- the sheet conveyed to the nip N is separated from the sheet bundle one by one by the separation roller 23 rotating in the direction opposite to the feeding roller 22 and conveyed to the conveyance path 13. Is done.
- the torque limiter provided on the separation roller 23 is activated, and the power transmission to the separation roller 23 is cut off.
- the separation roller 23 is driven by the rotation of the feeding roller 22. Rotate. As a result, one sheet is conveyed to the conveyance path 13.
- the sheet conveyed to the conveyance path 13 is nipped by the roller pair 31 and further conveyed. Then, the leading edge of the sheet is detected by the registration sensor 32, and information on both sides (or any side) of the sheet is read by the image sensors 33a and 33b. That is, reading by the image sensors 33a and 33b is started a predetermined time after the registration sensor 32 detects the leading edge of the sheet, and the image sensors 33a and 33b start after a predetermined time has elapsed since the registration sensor 32 detected the trailing edge of the sheet. Finish reading. Information read by the image sensors 33a and 33b is stored in a storage means (memory) provided in the apparatus or sent to an external terminal (not shown) (such as a personal computer).
- a storage means memory
- the sheet that has passed through the image sensors 33a and 33b is nipped by the pair of feeding rollers 42 and conveyed to the U-shaped conveyance path 41 (the state shown in FIG. 1) or discharged onto a sheet holding member 45 that functions as a sheet discharge tray. (State of FIG. 7).
- the sheet conveyed to the U-shaped conveyance path 41 is further nipped by the discharge roller pair 43 and discharged to the discharge tray 44.
- the sheet bundle is restricted from entering the nip portion by the abutting portion 61 and the regulating member 60 at the standby position of the intermediate plate 21b, even if the sheet bundle placed on the intermediate plate 21b is pushed in, the sheet It is difficult to get into the nip when a part of the bundle overlaps.
- the sheet is fed to the nip portion while being bent in contact with the pair of regulating elements 60a. Easy to separate from. That is, a gap is formed between the sheets that are in close contact with each other due to the bending of the sheets, and the sheets are easily separated. For this reason, even if the gap between the abutting portion 61 and the feeding roller 22 is not strictly regulated, the double feeding of sheets can be reduced.
- the apparatus since the regulating member 60 is only projected from the tip of the abutting portion 61 and overlapped with the feeding roller 22 in the width direction, the apparatus does not increase in size, and the abutting portion 61 and the feeding portion are fed. Combined with the fact that it is not necessary to strictly regulate the gap with the roller 22, it is possible to prevent an increase in cost. As a result, a structure capable of reducing double feeding of sheets can be obtained at low cost without increasing the size of the apparatus.
- the conveyance of a sheet having a small thickness such as plain paper and a large width and the conveyance of a thick sheet such as a plastic card having a thickness that is harder to bend than the normal sheet but has a small width. It is possible to correspond to each of these. That is, when a sheet having a large thickness but a small width is conveyed, the sheet is passed between the pair of regulating elements 60a. On the other hand, when a sheet having a small thickness but a large width is conveyed, the double feed can be reduced by contacting and bending the pair of regulating elements 60a as described above. As a result, it is possible to reduce double feeding of thin sheets while supporting conveyance of both thick and thin sheets.
- the regulating member 60 has a concave / convex surface 60b as a surface on which the sheet placed on the intermediate plate 21b abuts (a surface for guiding the sheet, a surface on the intermediate plate 21b side).
- the uneven surface 60b has a plurality of unevenness formed along the width direction. This makes it difficult to enter the nip portion N between the feeding roller 22 and the separation roller 23 even if the leading edge of the sheet is curled.
- the sheet is placed on the tray 21 with the intermediate plate 21 b moved to the standby position, and the leading end of the sheet is brought into contact with the abutting portion 61.
- the leading end of the sheet may enter the nip portion N after abutting against the abutting portion 61 and the regulating member 60. Therefore, in the present embodiment, the surface of the regulating member 60 on which the sheet abuts is the uneven surface 60b, and the leading edge of the curled sheet is hooked on the unevenness to make it difficult to enter the nip portion N.
- Other structures and operations are the same as those in the first embodiment.
- the regulating member 60 has a tip protruding from the regulating member 60 on a surface (a surface for guiding the sheet, a surface on the middle plate 21b side) on which the sheet placed on the middle plate 21b comes into contact.
- a rubber material 60c is provided with a rubber material 60c.
- the rubber material 60c is formed in a sheet shape, and is attached to a surface of the regulating member 60 on which the sheet abuts. Further, the front end of the sheet-like rubber material 60 c protrudes from the regulating member 60.
- the regulating member 60 is formed by a surface on which the sheet placed on the intermediate plate 21b abuts (a surface for guiding the sheet, a surface on the intermediate plate 21b side) and a sheet conveyance direction (a chain line in the drawing).
- the angle ⁇ is formed to be an obtuse angle. In other words, the closer to the feeding roller 22 (by the feeding roller 22), the more inclined toward the downstream in the sheet conveying direction. Therefore, the surface of the regulating member 60 on which the sheet abuts is also inclined with respect to the abutting portion 61.
- the pair of regulating elements 60a may not overlap the feeding roller 22 in the width direction as long as the double feeding of thin sheets can be reduced.
- double feeding of thin sheets is reduced by appropriately regulating the gap between the pair of regulating elements 60a and the feeding roller 22.
- the thick sheet is passed between the pair of restricting elements 60a as in the above-described embodiments.
- the feeding rotating body and the separation member that convey the sheet are not limited to the feeding roller and the separation roller, and may have other configurations such as a conveyance belt and a separation belt.
- the separation member is not limited to a rotating body, and may be a separation sheet.
- the low friction member does not need to be the tip of the sheet receiving member, and may be disposed at other portions such as an intermediate portion of the sheet receiving member as long as the sheet can be sandwiched facing the feeding rotating body.
- a fifth embodiment of the present invention will be described with reference to FIGS.
- a gap is inevitable between the intermediate plate and the separation roller.
- this gap becomes large. Therefore, when the sheet is moved in the direction opposite to the sheet conveyance direction by the separation roller in order to separate the sheet from the sheet bundle, a part of the sheet may enter the above-described gap.
- the leading end of the sheet on which the sheet is placed on the intermediate plate enters this gap. If a part of the sheet (including the leading edge) enters the gap, the sheet may be jammed or may be skewed while being conveyed while being inclined.
- the present embodiment realizes a structure capable of preventing the sheet from entering the gap between the sheet receiving member and the separation rotating body.
- This will be specifically described below.
- the same parts as those in the first to fourth embodiments described above are denoted by the same reference numerals, and the description thereof is basically omitted.
- the parts different from these embodiments and the overlapping parts are described below. Of these, the part according to the need will be mainly described.
- a separation roller 23 is provided at a position facing the feeding roller 22 downstream of the tray 21 in the sheet conveyance direction by the feeding roller 22.
- the separation roller 23 is disposed at a position adjacent to the feeding direction of the sheet by the roller 24 and the feeding roller 22 so as to sandwich the sheet with the feeding roller 22.
- the separation roller 23 is disposed via a gap G from the middle plate 21b of the tray 21 as shown in FIGS. That is, the gap G in the sheet conveying direction is provided so that the tip of the intermediate plate 21b and the separation roller 23 do not contact regardless of the rotation position of the intermediate plate 21b.
- the separation roller 23 includes a plurality of roller elements 23a as separation elements as shown in FIGS.
- the two roller elements 23 a are combined to form the separation roller 23.
- two cylindrical roller elements 23a are arranged side by side on the rotating shaft 23b, and the two roller elements 23a rotate with the rotating shaft 23b around the rotating shaft 23b.
- a predetermined gap h is provided in the width direction between the roller elements 23a and between the roller elements 23a (separation rollers 23) and the main body 11a.
- the separation roller 23 configured in this manner is supported so as to be movable (swingable) in the direction of moving toward and away from the feed roller 22 and is urged in a direction toward the feed roller 22 by a spring (not shown). . That is, the rotary shaft 23b is supported at a predetermined position of the main body 11a so as to be movable in the direction of moving toward and away from the feed roller 22, and the rotary shaft 23b is urged toward the feed roller 22 by a spring. Yes.
- the separation roller 23 is rotationally driven in a direction opposite to the rotation direction (sheet conveying direction) of the feeding roller 22 by a motor M (see FIG. 1) as a driving source. That is, the rotational drive of the motor M is transmitted to the rotating shaft 23b by a power transmission mechanism such as a gear, and the separation roller 23 rotates together with the rotating shaft 23b.
- a power transmission mechanism such as a gear
- the separation roller 23 rotates together with the rotating shaft 23b.
- the separation roller 23 is provided with a torque limiter so that power transmission from the motor can be cut off when a torque exceeding a predetermined value is applied.
- the apparatus main body 11 can be separated into the main body part 11a and the cover part 11b with the conveyance path 13 through which the sheet is conveyed in the apparatus main body 11 as a boundary.
- the main body 11a is provided with the tray 21 and the separation roller 23 described above, and the feeding roller 22 is supported by the cover 11b.
- the cover part 11b is rotatable with respect to the main body part 11a around the lower end portion of the main body part 11a. When the cover portion 11b is rotated, the conveyance path 13 is exposed (opened), and a sheet jammed in the conveyance path 13 can be removed.
- the feeding roller 22 contacts the separation roller 23, and the separation roller 23 sinks in the direction opposite to the spring biasing direction (moves away from the feeding roller 22).
- the feeding roller 22 and the separation roller 23 are in elastic contact with each other.
- the feeding roller 22 also comes into contact with a later-described roller 24 provided at the tip of the intermediate plate 21b.
- the intermediate plate 21b rotates around the rotation support portion in a direction against the elastic force of the spring 51 by a driving force transmitted from a motor (not shown) via a power transmission mechanism such as a gear. Move. Then, as shown in FIG. 17, a gap with the feeding roller 22 is provided.
- the intermediate plate 21b is urged toward the feeding roller 22, when the sheet (or sheet bundle) S is placed on the tray 21, the leading edge of the sheet is fed with the intermediate plate 21b. It is difficult to enter between the feed rollers 22. Therefore, as in the present embodiment, the intermediate plate 21 b is rotated in the direction opposite to the biasing direction of the spring 51 so that a gap is formed between the intermediate plate 21 b and the feeding roller 22. Thus, when the sheet (or sheet bundle) S is placed on the tray 21, the leading edge of the sheet can easily enter between the intermediate plate 21 b and the feeding roller 22, and the sheet is conveyed by the feeding roller 22. It can be done smoothly.
- the protruding member 70 is provided along the sheet conveying direction by the feeding roller 22 from the front end portion of the intermediate plate 21b. That is, the protruding member 70 is also a restricting portion, and passes through the gap G from the downstream end in the sheet conveying direction of the intermediate plate 21b, and the separation roller 23 that is at least one member of the feeding rotating body and the separation member. It overlaps in the width direction orthogonal to the sheet conveying direction, and protrudes from the separation roller 23 to a position deviated in the width direction. In other words, the protruding member 70 and the separation roller 23 are overlapped. The protruding member 70 arranged in this way regulates the position of the leading edge of the sheet placed on the intermediate plate 21b.
- the projecting member 70 includes a plurality (three in the illustrated example) of projecting elements 71.
- Each of the protruding elements 71 extends from the downstream end in the sheet conveying direction of the intermediate plate 21b to a position adjacent to both ends in the width direction of the plurality of roller elements 23a constituting the separating roller 23 and both ends in the width direction of the separating roller 23.
- Each is formed to protrude.
- Each protruding element 71 may be provided integrally with the middle plate 21b or may be configured by fixing a separate member.
- a plurality of protruding elements 71 constituting such a protruding member 70 are arranged along the width direction (longitudinal direction) of the intermediate plate 21b.
- the projecting element 71 includes not only a portion corresponding to the gap between the rollers, but also a plurality of protrusion elements 71 in order to fill a gap between the intermediate plate 21b and the apparatus main body facing the end of the intermediate plate 21b in the width direction. It is installed side by side. Therefore, on the apparatus main body side, insertion grooves into which the protruding elements 71 are inserted are respectively provided corresponding to the protruding elements 71.
- each projecting element 71 is disposed so as to enter the gap h.
- the width of each protruding element 71 is made smaller than the gap h.
- the surface of each protruding element 71 on the side of the feeding roller 22 is positioned farther from the feeding roller 22 than the surface (sheet placement surface) of the intermediate plate 21b on the side of the feeding roller 22. And even if the intermediate plate 21 b is closest to the feeding roller 22, each protruding element 71 is prevented from contacting the feeding roller 22.
- each projecting element 71 does not contact the feeding roller 22
- the surface of each projecting element 71 and the middle of each projecting element 71 are related to the length of each projecting element 71 described below.
- the sheet placement surface of the plate 21b may be on the same plane.
- the surface of each protruding element 71 may be positioned closer to the feeding roller 22 than the sheet placement surface of the intermediate plate 21b.
- each protruding element 71 (the amount of protrusion from the tip of the intermediate plate 21b) is larger than the length of the gap G in the sheet conveying direction.
- the shape including the length of each protruding element 71 and the position of the surface does not come into contact with the feeding roller 22 regardless of the movement of the intermediate plate 21b relative to the feeding roller 22. That is, as shown in FIG. 16, each protruding element 71 is placed at a position where the roller 24 of the intermediate plate 21 b comes into contact with the feeding roller 22, that is, at a position where the middle plate 21 b is closest to the feeding roller 22.
- the length, the surface position, and the shape of each protruding element 71 are regulated so as not to come into contact with each other.
- each protruding element 71 is formed to have a thickness that decreases toward the tip, but may have other shapes as long as the above relationship is satisfied.
- each protruding element 71 may be formed in a plate shape or a rod shape.
- a sheet (or a sheet bundle) for reading information is placed on the tray 21.
- the intermediate plate 21 b is sunk, and the leading edge of the sheet S enters between the intermediate plate 21 b and the feeding roller 22.
- the middle plate 21b is urged by the spring 51, and the leading edge of the sheet is fed with the middle plate 21b. It is pinched by the feed roller 22.
- the roller 24 supported at the front end of the intermediate plate 21 b comes into contact with the back surface of the sheet (the lowermost sheet in the case of a sheet bundle), and the sheet is sandwiched between the roller 24 and the feeding roller 22. .
- the feeding roller 22 is driven to rotate, and the separation roller 23 is rotated in the reverse direction.
- the sheets are separated from the sheet bundle one by one and conveyed to the conveyance path 13.
- the torque limiter provided on the separation roller 23 is activated, and the power transmission to the separation roller 23 is cut off.
- the separation roller 23 is driven by the rotation of the feeding roller 22. Rotate. As a result, one sheet is conveyed to the conveyance path 13.
- the sheet conveyed to the conveyance path 13 is nipped by the roller pair 31 and further conveyed. Then, the leading edge of the sheet is detected by the registration sensor 32, and information on both sides (or any side) of the sheet is read by the image sensors 33a and 33b. That is, reading by the image sensors 33a and 33b is started a predetermined time after the registration sensor 32 detects the leading edge of the sheet, and the image sensors 33a and 33b start after a predetermined time has elapsed since the registration sensor 32 detected the trailing edge of the sheet. Finish reading. Information read by the image sensors 33a and 33b is stored in a storage means (memory) provided in the apparatus or sent to an external terminal (not shown) (such as a personal computer).
- a storage means memory
- the sheet that has passed through the image sensors 33a and 33b is nipped by the pair of feeding rollers 42 and conveyed to the U-shaped conveyance path 41 (the state shown in FIG. 1) or discharged onto a sheet holding member 45 that functions as a sheet discharge tray. (State of FIG. 7).
- the sheet conveyed to the U-shaped conveyance path 41 is further nipped by the discharge roller pair 43 and discharged to the discharge tray 44.
- the protruding member 70 passes through the gap G from the front end of the intermediate plate 21b, overlaps with the separation roller 23 in the width direction, and is formed to a position away from the separation roller 23 in the width direction. For this reason, a part of the sheet can be prevented from entering the gap G. That is, when the sheet is separated from the sheet bundle by the separation roller 23, the sheet bundle is returned in the direction opposite to the sheet conveying direction. At this time, a part of the sheet is bent to easily enter the gap G between the separation roller 23 and the intermediate plate 21b.
- the sheet in the case of a thin sheet without stiffness, the sheet is easily bent, and a part of the sheet easily enters the gap G. Further, when the tray 21 is inclined and the weight placed in the direction in which the sheet placed on the tray 21 approaches the separation roller 23, the separation roller 23 returns the sheet against this weight. The sheet is easily bent by returning. In addition, the leading edge of the sheet may enter the gap G regardless of the return of the separation roller 23.
- the protruding member 70 and the separation roller 23 are overlapped in the width direction, even if the intermediate plate 21b is swung, the protruding member 70 can remain across the gap G, and a part of the sheet can be separated from the gap G. It can prevent more surely entering. That is, it can be considered that the gap G is made small by bringing the tip of the protruding portion close to the outer peripheral surface of the separation roller 23.
- the sheet can be prevented from entering the gap G, and the sheet can be prevented from being jammed or skewed, and the sheet can be conveyed stably.
- the projecting element 71 of the projecting member 70 between the roller elements 23a or between the roller element 23a and the main body 11a, the projecting elements 71 can be configured with a simple configuration regardless of the oscillation of the intermediate plate 21b. The contact with the separation roller 23 can be prevented. For this reason, the manufacturing cost can be reduced.
- a roller 24 is disposed at the tip of the intermediate plate 21b, and the resistance against sheet return is reduced by the separation roller 23. Therefore, it is possible to reduce the bending of the sheet when the sheet is returned by the separation roller 23. As a result, in combination with the presence of the protruding member 70 described above, the sheet can be more reliably prevented from entering the gap G, and stable sheet conveyance can be performed.
- the leading edge of the sheet is guided by the protruding member 70 and can easily come into contact with the feeding roller 22. For this reason, it is possible to reduce the size of the apparatus by reducing the feeding roller 22. That is, if the feeding roller 22 is made small without providing the protruding member 70 as in the present embodiment, the leading edge of the sheet is less likely to contact the feeding roller 22. On the other hand, in the case of this embodiment, even if the feeding roller 22 is made small, the leading edge of the sheet is guided to the protruding member 70 and the leading edge can be brought close to the feeding roller 22. As a result, even if the feeding roller 22 is made small, the sheet can be conveyed reliably, so that the apparatus can be downsized.
- the configuration of the separation roller 23 is not limited to this.
- a recess 23 c may be formed at the center of the separation roller 23.
- the central projecting element 71 is disposed so as to enter the recess 23c.
- the central projecting element 71 regulates the length and the like so as not to contact the recess 23c regardless of the position of the intermediate plate 21b.
- the separation roller may be constituted by three or more roller elements, may be provided with two or more recesses, or a combination thereof. And you may make it provide a protrusion element according to the clearance gap between roller elements, or the number of recessed parts.
- the separation roller may be constituted by a single roller element so that no recess is provided.
- protruding elements are provided on both sides in the width direction of the separation roller.
- the number of projecting elements may not be plural, and it is sufficient that at least one projecting element is formed so as to straddle the gap between the intermediate plate and the separation roller. However, in order to more reliably prevent a part of the sheet from entering the gap, it is preferable to provide a plurality of protruding elements.
- the separation roller 23 is driven by the motor M in the direction opposite to the feeding roller 22, but the separation roller 23 may have other configurations.
- a configuration as shown in FIG. 19 may be used. That is, the separation roller 23 is provided with a spring 80 as an elastic member as follows. The spring 80 is elastically deformed when the separation roller 23 rotates in the same direction as the sheet conveyance direction as the sheet is conveyed, and is elastically restored when the sheet that has rotated the separation roller 23 is separated from the separation roller 23. . Then, the separation roller 23 is rotated in the direction opposite to the sheet conveying direction by the elastic restoring force. In the case of this configuration, there is no motor that drives the separation roller 23.
- the separation roller 23 includes an outer ring 81 and an inner ring 82 fixed to the main body 11 a, and a coiled spring 80 is provided between the outer ring 81 and the inner ring 82.
- a part of the spring 80 is externally fitted to the inner ring 82, and one end of the spring 80 is locked to the locking portion 81 a of the outer ring 81.
- a force acts on the sheet bundle on the tray 21 in contact with the separation roller 23 in a direction to return to the tray 21 by the rotation of the separation roller 23. That is, the separation roller 23 is rotated in the direction opposite to the sheet conveying direction by the elastic restoring force of the spring 80, and the sheet bundle is returned in the direction opposite to the sheet conveying direction. As a result, the next sheet can be separated from the sheet bundle. Also in such a configuration, the protruding member as described above is provided to prevent part of the sheet from entering the gap G when the sheet is returned by the separation roller 23.
- the sheet receiving member such as the intermediate plate 21b is pressed against the feeding roller by a spring or the like.
- the sheet receiving member is fixed and the feeding rotating body is biased by the spring or the like.
- the feeding roller may be urged to the sheet receiving member by means.
- the feeding rotating body and the separating rotating body that convey the sheet are not limited to the feeding roller and the separating roller, but may be other configurations such as a conveying belt and a separating belt.
- the low friction member does not need to be the tip of the sheet receiving member, and may be disposed at other portions such as an intermediate portion of the sheet receiving member as long as the sheet can be sandwiched facing the feeding rotating body.
- FIG. 1 A sixth embodiment of the present invention will be described with reference to FIG. This embodiment is a combination of the first embodiment and the fifth embodiment described above. The same applies when the second to fourth embodiments and the fifth embodiment are combined.
- the abutting portion 61 has an opening side of the conveyance path 13 so as to restrict the entry of the sheet S placed on the intermediate plate 21b into the conveyance path (opening).
- a restricting member 60 that partially protrudes is provided.
- the regulating member 60 is provided corresponding to both sides of the nip portion N formed by the feeding roller 22 and the separation roller 23. Further, the regulating member 60 is superposed in the width direction perpendicular to the sheet feeding direction from the feeding roller 22 that is a feeding rotating body from the abutting portion 61, and is positioned away from the feeding roller 22 in the width direction. (In a position not contacting the feeding roller) so as to reach the maximum.
- the regulating member 60 partially overlaps the feeding roller 22 when viewed from the axial direction of the feeding roller 22. That is, the regulating member 60 and the feeding roller 22 are overlapped.
- the regulating member 60 arranged in this way regulates the position of the leading edge of the sheet placed on the intermediate plate 21b.
- the protruding member 70 is provided from the front end portion of the intermediate plate 21b along the sheet conveying direction by the feeding roller 22. That is, the protruding member 70 passes through the gap G from the downstream end in the sheet conveyance direction of the intermediate plate 21b, overlaps with the separation roller 23, which is a separation rotating body, in the width direction orthogonal to the sheet conveyance direction, and the separation roller 23. Projecting to a position deviated in the width direction. In other words, the protruding member 70 and the separation roller 23 are overlapped. The protruding member 70 arranged in this way regulates the position of the leading edge of the sheet placed on the intermediate plate 21b.
- the regulating member 60 and the projecting member 70 are arranged so as to overlap at least in the width direction perpendicular to the sheet conveying direction when the middle plate 21b is at the feeding position. That is, the regulating member 60 and the projecting member 70 are overlapped with each other while the intermediate plate 21b is moved to the feeding position. Depending on the amount of movement of the intermediate plate 21b and the positional relationship between the restricting member 60 and the abutting portion 61, the restricting member 60 and the protruding member 70 may be exceeded even when the intermediate plate 21b is moved to the standby position. You may make it wrap.
- the leading edge of the sheet placed on the intermediate plate 21b is regulated by the regulating member 60 and the protruding member 70, so that the sheet can be conveyed by the feeding roller 22 in a more stable state.
- the leading edge of the sheet placed on the middle plate 21 b at the standby position comes into contact with the abutting portion 61 or the regulating member 60, the leading edge of the sheet enters the gap G between the middle plate 21 b and the separation roller 23.
- the protruding member 70 is formed from the intermediate plate 21b as described above, the leading edge of the sheet can be prevented from entering the gap G.
- the leading edge of the sheet may be caught in the gap G due to contact with the abutting portion 61 or the regulating member 60.
- the protruding member 70 is formed from the intermediate plate 21b as described above, the leading edge of the sheet can be prevented from entering the gap G.
- tip was guided to the protrusion member 70 bends with the control member 60, it can improve the separation property of a sheet
- the regulating member 60 and the projecting member 70 are overlapped at the feeding position, even if the sheet is bent by the regulating member 60 and a part of the leading end of the sheet is likely to enter the gap G, the projecting member 70. This can prevent this. That is, as shown in FIG. 20, when viewed from the width direction, a virtual corner is formed by the regulating member 60 and the protruding member 70. For this reason, the front end of the sheet can be guided so as not to enter the gap G, and the sheet can be bent to improve the separation of the sheet, and as a result, the conveyance of the sheet can be improved.
- the separation located in the center portion in the width direction. It is preferable to provide the protruding element 71 of the protruding member 70 in the roller 23 portion. That is, when the pair of regulating elements 60a are provided apart from each other in the width direction, the front end of the sheet abuts against the pair of regulating elements 60a and is guided, so that the central portion of the leading end of the sheet protrudes toward the gap G. It tends to bend in the direction.
- the projecting member 70 exists in the central portion in the width direction that protrudes due to this bending, the central portion of the sheet can be prevented from entering the gap G due to the bending, and the occurrence of a jam or the like can be achieved while improving the separation property of the sheet. This can prevent the sheet from being conveyed.
- Other configurations and operations are the same as those of the above-described embodiments.
- the sheet conveying apparatus is suitable for use in an original information reading apparatus such as a scanner, and an image forming apparatus such as a copying machine, a printer, a facsimile, or a complex machine thereof.
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- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
本発明の第1の実施形態について、図1ないし図8を用いて説明する。
まず、本発明の対象となる原稿情報読取装置の全体構成について簡単に説明する。原稿情報読取装置(以下、スキャナ)1は、図1に示すように、シート搬送装置である給紙部2と、シート上の情報を読み取る情報読取部3と、シートを排出する排出部4と、を備える。そして、給紙部2から給紙されたシート上の画像情報を、情報読取部3で読み取り、情報が読み取られたシートは、排出部4から排出される。また、スキャナ1は、装置の設置面積を小さくすべく、シートを搬送する角度を鉛直方向に近づけて搬送する構造としている。
給紙部2は、スキャナ1の装置本体11の上部に配置され、給送回転体である給送ローラ22と、給送ローラ22と対向して配置され、シートを載置するトレイ21と、分離部材である分離ローラ23と、低摩擦部材であるローラ24と、を有する。
次に、シート受部材である中板21bを給送位置と待機位置との間で移動させる移動部である中板移動装置50について、図4及び図5を参照しつつ、図6を用いて説明する。中板移動装置50は、付勢手段であるばね51と、駆動側部材である駆動ギヤ52と、移動側部材である回動軸53と、中板21bに固定された係合部材54と、動力断接手段であるワンウェイクラッチ55とを有する。
情報読取部3は、図1に示すように、装置本体11のシート搬送方向中間部に配置され、ローラ対31と、レジストセンサ32と、イメージセンサ33a、33bと、を有する。ローラ対31は、駆動ローラ31aと従動ローラ31bとから構成され、このうちの駆動ローラ31aは本体部11aに、従動ローラ31bはカバー部11bにそれぞれ設けられている。駆動ローラ31aは不図示の駆動源であるモータにより回転駆動し、従動ローラ31bは、駆動ローラ31aに従動して回転する。このようなローラ対31は、給紙部2から搬送されたシートを給送ローラ22による搬送方向と同方向に搬送する。
排出部4は、装置本体11のシート搬送方向下流に配置され、搬送路13と連続するU字搬送路41と、給送ローラ対42と、排紙ローラ対43と、排紙トレイ44と、シート抑え部材45と、を有する。このうちのU字搬送路41は、U字状に形成されたシートが搬送される搬送路である。このようなU字搬送路41は、カバー部11bの下面に形成されたU字状の曲面部41aと、ヒンジ46により装置本体11に接続されたU字状の湾曲部材41bとから構成される。この湾曲部材41bは、図7に示すように、ヒンジ46を中心として回動可能である。このため、U字搬送路41内にシートがジャムした場合には、湾曲部材41bを回動させてU字搬送路41を露出させることにより、ジャム処理が可能である。
このような本実施形態の場合、まず、情報を読み取るシート(或いはシート束)をトレイ21に載置する。シートをトレイ21に載置する際には、図5に示したように、中板21bが沈んでおり、中板21bと給送ローラ22との間にシートSの先端が進入し、シートSの先端が突き当て部61に突き当たる。そして、この状態で、例えば、ユーザが装置に設けられた読取開始ボタンを押すなどして、動作が開始すると、中板移動装置50の駆動により中板21bがばね51に付勢されて、シートの先端が中板21bと給送ローラ22とにより挟持される。この際、シート(シート束の場合には一番下のシート)の裏面に、中板21bの先端に支持されたローラ24が接触し、シートがローラ24と給送ローラ22とで挟持される。
本発明の第2の実施形態について、図9を用いて説明する。本実施形態の場合、規制部材60は、中板21bに載置されたシートが当接する面(シートを案内する面、中板21b側の面)を、凹凸面60bとしている。凹凸面60bは、幅方向に沿って形成された複数の凹凸を有する。これにより、シートの先端がカールしていても、給送ローラ22と分離ローラ23とのニップ部Nに進入しにくくしている。
本発明の第3の実施形態について、図10及び図11を用いて説明する。本実施形態の場合、規制部材60は、中板21bに載置されたシートが当接する面(シートを案内する面、中板21b側の面)に、規制部材60からその先端が突出するようにゴム材60cを設けている。具体的には、ゴム材60cはシート状に形成され、規制部材60のシートが当接する面に張り付けられている。また、シート状のゴム材60cの先端が規制部材60よりも突出するようにしている。
本発明の第4の実施形態について、図12を用いて説明する。本実施形態の場合、規制部材60は、中板21bに載置されたシートが当接する面(シートを案内する面、中板21b側の面)とシート搬送方向(図の鎖線)とがなす角度αが鈍角となるように形成されている。言い換えれば、給送ローラ22に近づくほど(給送ローラ22による)シート搬送方向下流に向かう方向に傾斜している。したがって、規制部材60のシートが当接する面は、突き当て部61に対しても傾斜している。
本発明の第5の実施形態について、図13ないし図17を用いて説明する。前述した特許文献1に記載された構造のように、中板のシート搬送方向下流に分離ローラを設ける構造の場合、中板と分離ローラとの間に隙間が生じることが避けられない。特に、中板が給送ローラに対して遠近動する方向に揺動する構造の場合、この隙間が大きくなる。したがって、シート束からシートを分離すべく、分離ローラによりシートをシート搬送方向と逆方向に移動させた場合、シートの一部が上述の隙間に入り込む可能性がある。また、シートを中板上に載置したシートの先端部がこの隙間に入り込む可能性もある。シートの一部(先端を含む)がこの隙間に入り込むと、シートが詰まってジャムしたり、シートが傾斜して搬送される斜行が生じたりする原因にもなる。
このような本実施形態の場合も、まず、情報を読み取るシート(或いはシート束)をトレイ21に載置する。シートをトレイ21に載置する際には、図17に示したように、中板21bが沈んでおり、中板21bと給送ローラ22との間にシートSの先端が進入する。そして、この状態で、例えば、ユーザが装置に設けられた読取開始ボタンを押すなどして、動作が開始すると、中板21bがばね51に付勢されて、シートの先端が中板21bと給送ローラ22とにより挟持される。この際、シート(シート束の場合には一番下のシート)の裏面に、中板21bの先端に支持されたローラ24が接触し、シートがローラ24と給送ローラ22とで挟持される。
本発明の第6の実施形態について、図20を用いて説明する。本実施形態は、上述の第1の実施形態と第5の実施形態とを組み合わせたものである。なお、第2~第4の実施形態と第5の実施形態とを組み合わせても同様である。
11a 本体部(筐体)
2 給紙部(シート搬送装置)
21b 中板(シート受部材)
22 給送ローラ(給送回転体)
23 分離ローラ(分離部材、分離回転体)
23a ローラ素子(分離素子)
24 ローラ(回転部材)
24b 小径部(回転軸)
3 情報読取部
4 排出部
60 規制部材(規制部)
60a 規制素子
61 突き当て部
70 突出部材(規制部)
71 突出素子
80 ばね(弾性部材)
N ニップ部
S シート
Claims (18)
- シートを載置するシート受部材と、
前記シート受部材に載置されたシートを給送する給送回転体と、
前記シート受部材上のシート束からシートを分離する分離部材と、
前記給送回転体と前記分離部材とのうちの少なくとも一方の部材とシート搬送方向に直交する幅方向に重畳し、且つ、前記一方の部材から前記幅方向に外れた位置に達するように配置され、前記シート受部材に載置されるシートの先端位置を規制する規制部と、を備えた、
ことを特徴とするシート搬送装置。 - 前記シート受部材は、筐体に移動自在に支持され、
前記分離部材は、前記給送回転体と当接してニップ部を形成し、
前記シート受部材を、前記シート受部材に載置されたシートを前記給送回転体に当接させる給送位置と、前記給送位置よりも前記給送回転体から離れた待機位置との間で移動させる移動部と、
前記シート受部材と前記ニップ部との間に配置され、前記待機位置での前記シート受部材に載置されたシートの先端を当接させる、前記筐体に固定の突き当て部と、を有し、
前記規制部は、前記突き当て部から、前記給送回転体とシート搬送方向に直交する幅方向に重畳し、且つ、前記給送回転体から前記幅方向に外れた位置まで突出する規制部材を有し、
前記規制部材は、前記突き当て部と共に、前記待機位置での前記シート受部材に載置されたシート束が前記ニップ部に進入することを規制し、前記給送位置で前記給送回転体により搬送されるシートと接触して、前記シートを撓ませた状態で前記ニップ部に送る、
ことを特徴とする、請求項1に記載のシート搬送装置。 - 前記分離部材は、前記シート受部材の前記給送回転体によるシート搬送方向下流に、前記シート受部材と隙間を介して配置され、シートを前記シート搬送方向と逆方向に移動させて前記シート受部材上のシート束からシートを1枚ずつ分離する分離回転体であり、
前記規制部は、前記シート受部材の前記シート搬送方向下流端から前記隙間を通り、前記分離回転体と前記シート搬送方向に直交する幅方向に重畳し、且つ、前記分離回転体から前記幅方向に外れた位置まで突出した突出部材を有する、
ことを特徴とする、請求項1に記載のシート搬送装置。 - 前記シート受部材は、筐体に移動自在に支持され、
前記分離部材は、前記シート受部材の前記給送回転体によるシート搬送方向下流に、前記シート受部材と隙間を介して配置され、前記給送回転体と当接してニップ部を形成すると共に、シートを前記シート搬送方向と逆方向に移動させて前記シート受部材上のシート束からシートを1枚ずつ分離する分離回転体であり、
前記シート受部材を、前記シート受部材に載置されたシートを前記給送回転体に当接させる給送位置と、前記給送位置よりも前記給送回転体から離れた待機位置との間で移動させる移動部と、
前記シート受部材と前記ニップ部との間に配置され、前記待機位置での前記シート受部材に載置されたシートの先端を当接させる、前記筐体に固定の突き当て部と、を有し、
前記規制部は、前記突き当て部から、前記給送回転体とシート搬送方向に直交する幅方向に重畳し、且つ、前記給送回転体から前記幅方向に外れた位置に達するように配置され、搬送されるシートの先端位置を規制する規制部材と、前記シート受部材の前記給送回転体によるシート搬送方向下流端から、前記分離回転体と前記幅方向に重畳し、且つ、前記分離回転体から前記幅方向に外れた位置まで突出し、前記シート受部材に載置されるシートの先端位置を規制する突出部材と、を有する、
ことを特徴とする、請求項1に記載のシート搬送装置。 - 前記規制部材と前記突出部材とは、少なくとも前記シート受部材が前記給送位置の際に前記幅方向に重畳して配置されている、
ことを特徴とする、請求項4に記載のシート搬送装置。 - 前記規制部材の前記シート受部材に載置されたシートが当接する面は、前記突き当て部の前記シート受部材に載置されたシートが突き当たる面と連続して形成されている、
ことを特徴とする、請求項2又は4に記載のシート搬送装置。 - 前記規制部材は、前記幅方向に所定の間隔をあけて設けられた一対の規制素子を有し、
前記所定の間隔よりも小さい幅のシートは前記一対の規制素子の間を通過させて前記ニップ部に案内し、前記所定の間隔以上の幅のシートは前記一対の規制素子に接触させて前記ニップ部に案内する、
ことを特徴とする、請求項2又は4に記載のシート搬送装置。 - 前記一対の規制素子は、前記幅方向に関し互いに対向する面が、先端に向かうほど間隔が広くなる方向に傾斜するように形成されている、
ことを特徴とする、請求項7に記載のシート搬送装置。 - 前記一対の規制素子は、前記分離部材の幅方向両側にそれぞれ配置されている、
ことを特徴とする、請求項7記載のシート搬送装置。 - 前記規制部材は、前記シート受部材に載置されたシートが当接する面に、幅方向に沿って形成された凹凸を有する、
ことを特徴とする、請求項2又は4に記載のシート搬送装置。 - 前記規制部材は、前記シート受部材に載置されたシートが当接する面に、前記規制部材からその先端が突出するようにゴム材を設けた、
ことを特徴とする、請求項2又は4に記載のシート搬送装置。 - 前記規制部材は、前記シート受部材に載置されたシートが当接する面と前記シート搬送方向とがなす角度が鈍角となるように形成されている、
ことを特徴とする、請求項2又は4に記載のシート搬送装置。 - 前記分離回転体を前記シート搬送方向と逆方向に回転駆動する駆動源を有する、
ことを特徴とする、請求項3又は4に記載のシート搬送装置。 - シートの搬送に伴い前記分離回転体が前記シート搬送方向と同方向に回転することにより弾性変形し、前記分離回転体を回転させていたシートが前記分離回転体から離れることにより弾性的に復元し、この弾性復元力により前記分離回転体を前記シート搬送方向と逆方向に回転させる弾性部材を有する、
ことを特徴とする、請求項3又は4に記載のシート搬送装置。 - 前記シート受部材は、前記シート搬送方向下流端が前記給送回転体に遠近動する方向に揺動可能に支持され、
前記突出部材は、前記シート受部材の前記給送回転体に対する遠近動に拘らず、前記給送回転体に接触しないように形成されている、
ことを特徴とする、請求項3又は4に記載のシート搬送装置。 - 前記シート受部材の前記給送回転体と対向する位置に、前記幅方向に配置された回転軸を中心として回転自在に支持され、前記給送回転体との間でシートを挟持する回転部材を有する、
ことを特徴とする、請求項3又は4に記載のシート搬送装置。 - 前記分離回転体は、複数の分離素子により構成され、
前記突出部材は、前記シート受部材の前記シート搬送方向下流端から、前記複数の分離素子の前記幅方向端面同士の間及び前記分離回転体の前記幅方向両端に隣接した位置まで、それぞれ突出するように形成された複数の突出素子により構成される、
ことを特徴とする、請求項3又は4に記載のシート搬送装置。 - 装置の使用状態で、前記シート受部材上のシートが前記分離回転体に近づく方向に自重が作用するように、前記シート受部材が設置される、
ことを特徴とする、請求項3又は4に記載のシート搬送装置。
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CN104803219A (zh) * | 2014-01-29 | 2015-07-29 | 夏普株式会社 | 供纸装置以及图像形成装置 |
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CN102367115B (zh) * | 2010-06-30 | 2016-03-16 | 立志凯株式会社 | 片材折叠装置 |
KR102566136B1 (ko) | 2016-10-14 | 2023-08-10 | 삼성전자주식회사 | 계측 시스템 및 이를 사용하는 스테이지 제어 장치 |
JP6880927B2 (ja) * | 2017-03-30 | 2021-06-02 | ブラザー工業株式会社 | シート給送装置 |
EP3749875B1 (en) * | 2018-02-08 | 2023-04-19 | Philip Morris Products S.A. | Pair of connectable portions for connecting a transmission shaft and a roller |
US10827087B1 (en) * | 2019-09-12 | 2020-11-03 | Toshiba Tec Kabushiki Kaisha | Image reading apparatus that starts scanning based on detection of original and control method thereof |
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CN104803219B (zh) * | 2014-01-29 | 2017-08-08 | 夏普株式会社 | 供纸装置以及图像形成装置 |
Also Published As
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US20140021679A1 (en) | 2014-01-23 |
US9051141B2 (en) | 2015-06-09 |
JP5866343B2 (ja) | 2016-02-17 |
JPWO2012137871A1 (ja) | 2014-07-28 |
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