JP3690152B2 - Paper feed mechanism - Google Patents

Paper feed mechanism Download PDF

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Publication number
JP3690152B2
JP3690152B2 JP35829698A JP35829698A JP3690152B2 JP 3690152 B2 JP3690152 B2 JP 3690152B2 JP 35829698 A JP35829698 A JP 35829698A JP 35829698 A JP35829698 A JP 35829698A JP 3690152 B2 JP3690152 B2 JP 3690152B2
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JP
Japan
Prior art keywords
braking
friction braking
members
positioning
rack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP35829698A
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Japanese (ja)
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JP2000177850A (en
Inventor
直人 杉村
雅人 皆川
Original Assignee
富士ゼロックス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to JP35829698A priority Critical patent/JP3690152B2/en
Publication of JP2000177850A publication Critical patent/JP2000177850A/en
Application granted granted Critical
Publication of JP3690152B2 publication Critical patent/JP3690152B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet feeding mechanism that is provided in an image forming apparatus such as a copying machine, a printer, or a facsimile machine and that feeds a sheet member such as a recording sheet.
[0002]
[Prior art]
In general, a copying machine that reads a document and performs a copying process is equipped with a paper manual tray in which recording paper is manually inserted and a paper cassette in which a plurality of recording papers are stacked and automatically fed sequentially. . Also, image forming apparatuses such as printers and facsimiles are equipped with either or both of the same paper manual tray and paper cassette.
[0003]
These paper manual trays and paper cassettes are provided with a paper feed mechanism for feeding a sheet member such as a recording paper to the transport path.
[0004]
8, 9, and 10 show such a paper feeding mechanism 140.
[0005]
The paper feed mechanism 140 is provided with a paper feed table 142 equipped with a paper plate (not shown) on which the recording paper 190 is placed. This sheet plate is structured so as to move up and down, and has a function of pushing up the loaded recording sheet 190 toward the feeding roll in the image forming apparatus.
[0006]
A pair of positioning members 150 and 160 are slidably mounted on the paper feed table 142.
[0007]
The positioning members 150 and 160 are connected to a pair of racks 170 and 180. The racks 170 and 180 are arranged such that the longitudinal direction (movement direction) is aligned with the sliding direction of the positioning members 150 and 160 (arrow D direction in the figure), and the tooth surfaces 174 and 184 face each other.
[0008]
Further, the tooth surfaces 174 and 184 mesh with a pinion 146 that is rotatably provided on the paper feed table 142.
[0009]
In addition, ribs 178 and 188 extend outside the racks 170 and 180 along the moving direction of the racks 170 and 180 on the paper feed table 142. On the other hand, the racks 170 and 180 are provided with a plurality of friction braking members 175 and 185 at substantially equal intervals on the side opposite to the tooth surfaces 174 and 184, and are in pressure contact with the ribs 178 and 188. In this example, each rack is provided with three friction braking members.
[0010]
Accordingly, when one of the pair of positioning members, for example, the positioning member 150 is slid inward, the other positioning member 160 is also slid inward via the rack 170, the pinion 146, and the rack 180. .
[0011]
Further, a braking force is generated when the positioning members 150 and 160 are slid by the friction force generated between the friction braking member 175 and the rib 178 and between the friction braking member 185 and the rib 188, and the position is maintained when stopped. A holding force is generated.
[0012]
Here, a force that resists the movement of the positioning members 150 and 160 is referred to as a braking force, and a force that maintains the position when stopped is referred to as a holding force (hereinafter also used in the same manner).
[0013]
With the paper feed mechanism 140 configured as described above, the interval between the positioning members 150 and 160 is set wider than the width of the recording paper 190 to be stacked in advance, and the recording paper 190 is set between the positioning members 150 and 160 and then positioned. The recording paper 190 can be positioned at the center of the paper feed table 142 by sliding the members 150 and 160 in the approaching direction and bringing the standing walls 154 and 164 into contact with both side edges of the recording paper 190, respectively.
[0014]
[Problems to be solved by the invention]
However, in the above configuration, the frictional braking members 175 and 185 are pressed against each other when the frictional braking members 175 and 185 are simultaneously overlapped with the meshing positions of the racks 170 and 180 and the pinion 146 and when the frictional braking members 175 and 185 are simultaneously separated from the meshing position. different.
[0015]
Therefore, a difference occurs in the friction force generated between the friction braking member 175 and the rib 178 and between the friction braking member 185 and the rib 188 at each position.
[0016]
These differences will be described with reference to the drawings.
[0017]
8 and 10, the reaction portions of the racks 170 and 180 by the friction braking members 175 and 185 are pressed by the pinion 146, so that the friction braking members 175 and 185 are strongly pressed against the ribs 178 and 188. To do.
[0018]
In contrast, in the position of FIG. 9, the reaction portions of the racks 170 and 180 by the friction braking members 175 and 185 are not pressed by the pinion 146. Therefore, the friction braking members 175 and 185 here are slightly pressed against the ribs 178 and 188 as compared with the positions in FIGS. 8 and 10.
[0019]
Therefore, when the positioning members 150 and 160 are slid from the positions of FIGS. 8 and 10 to the position of FIG. 9 or vice versa, the braking force changes and the operability is deteriorated. Further, since the braking force is weak at the position of FIG. 9, it is difficult to stop the positioning members 150 and 160.
[0020]
Further, when the positioning of the recording paper 190 by the positioning members 150 and 160 overlaps with a position where the frictional braking members 175 and 185 are weakly pressed as shown in FIG. 9, the holding force of the positioning members 150 and 160 also decreases.
[0021]
For this reason, the positioning members 150 and 160 may move outward due to vibration or the like when the paper plate moves up and down. Further, if a force for pulling out obliquely acts on the recording paper 190 when feeding the paper, the positioning members 150 and 160 may not be able to hold the position of the recording paper 190 and may also move outward.
[0022]
When such a movement amount is large, the recording paper 190 is fed in a state where the center is deviated, or is caused to be obliquely fed.
[0023]
In view of the above facts, an object of the present invention is to provide a paper feed mechanism in which a positioning member for positioning a sheet member such as a recording sheet has good operability and the positioning member is held at a predetermined position. .
[0024]
[Means for Solving the Problems]
According to a first aspect of the present invention, a pair of positioning members that are in contact with the sheet member from both sides and adjust the position are slidably mounted on a table on which the sheet member is placed.
[0025]
Each positioning member is connected to a pair of racks that move along the guide portion. A pinion meshes with the pair of racks, and each of the racks is provided with a braking member that generates a braking force with the guide portion.
[0026]
Here, when the braking member of one rack is in the meshing position of the pinion and the rack, the braking member of the other rack is arranged so as not to be positioned in this meshing position.
[0027]
Accordingly, each of the braking members does not overlap with the meshing position with the pinion at the same time, and the difference in frictional force generated between the braking member and the guide portion during the sliding of the positioning member is reduced. Accordingly, the amount of change in the braking force by the braking member (the width between the maximum value and the minimum value of the braking force) is also reduced, so that the operability of the positioning member is improved.
[0028]
In addition, as for the arrangement of the braking member, as described in claim 2, when the sheet member is aligned with the fixed size position by the pair of positioning members, the braking member provided on one of the pair of racks is connected to the pinion. It can also be in the meshing position.
[0029]
In the paper feed mechanism according to the third aspect, the braking member is an arch-shaped convex portion having elasticity that supports both ends, and the convex portion slides on the guide portion to generate a braking force.
[0030]
Further, according to a fourth aspect of the present invention, the brake member may be provided with a hook portion at a contact portion with the guide portion, and the guide portion may be provided with a hook portion into which the hook portion is fitted.
[0031]
The hook portion provided in the guide portion is disposed at a position where the hook portion of the braking member can be fitted when the sheet member is aligned with the standard size position by the pair of positioning members.
[0032]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0033]
(First embodiment)
FIG. 1 shows a paper cassette 12 having a paper feed mechanism 10 according to the first embodiment of the present invention.
[0034]
The paper cassette 12 is equipped with a concave paper feed table 20 having a square shape and a peripheral wall on the outer periphery. On the side walls 22 provided at both ends in the width direction of the paper feed table 20, pins 24 are provided facing each other in the vicinity of the middle.
[0035]
A paper plate 30 on which the recording paper 90 is placed is attached in the peripheral wall of the paper feed table 20.
[0036]
Support portions 32 having holes 34 are provided at both ends of the paper plate 30, and the holes 34 are inserted into the pins 24. Thereby, the paper plate 30 is rotatably supported by the paper feed table 20.
[0037]
Further, a compression spring 38 is provided between the lower surface of the paper plate 30 and the paper feed table 20 in the vicinity of the front end portion 36 of the paper plate 30. Therefore, the leading end portion 36 of the sheet plate 30 is urged upward by the compression spring 38 and pushes the stacked recording sheets 90 toward the feeding roll (not shown) in the image forming apparatus.
[0038]
The recording paper 90 loaded in such a state is unloaded from the paper cassette 12 in the direction of arrow A in the drawing by a feed roll and fed into the image forming apparatus.
[0039]
Further, a stopper 40 is movably mounted on the paper feed table 20 along a guide groove 41 formed in the longitudinal direction (depth direction).
[0040]
The stopper 40 is brought into contact with the rear end of the recording paper 90 to position the recording paper 90 in the carry-out direction. At the same time, the size of the recording paper set on the paper feed table 20 at the position of the stopper 40 is discriminated by a discriminating mechanism (not shown) linked to the movement of the stopper 40.
[0041]
Next, the paper feed mechanism 10 according to the present embodiment will be described in detail.
[0042]
The paper feed table 20 is formed with guide grooves 42 and 44 extending from the vicinity of the center in the width direction toward the side wall 22.
[0043]
A pair of positioning members 50 and 60 are disposed above the guide grooves 42 and 44. The positioning members 50 and 60 are provided with positioning portions 54 and 64 that abut against both side edges of the recording paper 90 and align the position of the recording paper 90.
[0044]
Further, guide pins 52 and 62 are provided on the lower surfaces of the positioning members 50 and 60, and the guide pins 52 and 62 are slidably inserted into the guide grooves 42 and 44, respectively.
[0045]
A pair of racks 70 and 80 made of synthetic resin are disposed on the back side of the guide grooves 42 and 44.
[0046]
The racks 70 and 80 are formed with holes 72 and 82 on one end side. Guide pins 52 and 62 are inserted into the holes 72 and 82, and the racks 70 and 80 are connected to the positioning members 50 and 60.
[0047]
In addition, the tooth surfaces 74 and 84 of the racks 60 and 70 face each other, and the longitudinal direction of the racks 60 and 70 is aligned with the direction of the width direction of the paper feed table 20.
[0048]
On the other hand, a pinion 46 is rotatably mounted between the guide groove 42 and the guide groove 44 on the back side of the paper feed table 20. The tooth surfaces 74 and 84 of the racks 70 and 80 mesh with the pinion 46.
[0049]
Accordingly, when one of the pair of positioning members is slid, for example, the positioning member 50 is slid inward, the other positioning member 60 is also slid inwardly via the rack 70, the pinion 46, and the rack 80. .
[0050]
With these configurations, after the recording paper 90 as a sheet member is set between the positioning members 50 and 60, the positioning portions 54 and 64 of the positioning members 50 and 60 are brought into contact with both side edges of the sheet member, The recording paper 90 can be positioned at the center of the paper feed table 20.
[0051]
A plurality of friction braking members 75 and 85 are provided on the opposite surface side of the teeth 74 and 84 of the racks 70 and 80. In the present embodiment, each rack is provided with three friction braking members, and for the sake of convenience, the friction braking members 75A, 75B, and 75C and the friction braking members 85A, 85B, and 85C are provided from the other end side.
[0052]
In the following, when the friction braking members are not particularly distinguished by reference numerals, that is, when the friction braking members 75 and 85 are referred to, all of the friction braking members 75A, 75B and 75C and the friction braking members 85A, 85B and 85C are used. Shall be included.
[0053]
As shown in FIG. 5, the friction braking members 75 and 85 are arch-shaped members that are cantilevered by the racks 70 and 80, and are integrated with the racks 70 and 80.
[0054]
On the other hand, a bottom plate 48 is attached to the lower surface of the paper feed table 20. Ribs 78 and 88 extend in parallel to the racks 70 and 80 on the bottom plate 48, and the vicinity of the convex end portions 76 and 86 of the friction braking members 75 and 85 are pressed against the ribs 78 and 88. .
[0055]
By the way, the racks 70 and 80 are made of synthetic resin as described above. Therefore, the friction braking members 75 and 85 are also made of synthetic resin.
[0056]
Accordingly, when the vicinity of the convex end portions 76 and 86 of the friction braking members 75 and 85 are pressed toward the ribs 78 and 88 (in the direction of arrow C in the figure), the friction braking members 75 and 85 are bent and elastic from the vicinity of the roots. As a result, the frictional force is generated between the vicinity of the convex end portions 76 and 86 and the ribs 78 and 88.
[0057]
Here, the arrangement of the friction braking members 75 and 85 provided in the racks 70 and 80 will be described with reference to the drawings.
[0058]
FIG. 2 shows a state in which the recording sheet 90 of a certain standard size is positioned by the positioning members 50 and 60 from the bottom surface direction (the direction of arrow B in FIG. 1) (for example, the longitudinal direction of A4 size or A3 size). Width direction).
[0059]
In this case, the friction braking member 75 </ b> A is arranged on the rack 70 so that the friction braking member 75 </ b> A matches the meshing position of the pinion 46 and the rack 70. Here, the reaction portion of the rack 70 by the friction braking member 75 </ b> A is pressed by the pinion 46, and the friction braking member 75 </ b> A is pressed strongly against the rib 78.
[0060]
On the other hand, on the rack 80 side, each friction braking member 85 is disposed on the rack 80 so that the friction braking member 85 does not match the meshing position of the pinion 46 and the rack 80. Therefore, the friction braking member 85 is slightly weaker than the friction braking member 75A and presses against the rib 88.
[0061]
Next, FIG. 3 shows a state in which the recording paper 92 having a fixed size that is slightly smaller than the recording paper 90 in FIG. 2 is positioned by the positioning members 50 and 60 from the bottom surface direction (the direction of arrow B in FIG. 1). (For example, the longitudinal direction of B5 size or the width direction of B4 size).
[0062]
In this case, the friction braking member 85 </ b> A is disposed on the rack 80 so that the friction braking member 85 </ b> A matches the meshing position of the pinion 46 and the rack 80. Here, the reaction portion of the rack 80 by the friction braking member 85 </ b> A is pressed by the pinion 46, and the friction braking member 85 </ b> A is in strong pressure contact with the rib 88.
[0063]
On the other hand, on the rack 70 side, each friction braking member 75 is arranged on the rack 70 so that the friction braking member 75 does not match the meshing position of the pinion 46 and the rack 70. However, the friction braking member 75A is at a position that also satisfies the conditions described in FIG.
[0064]
In other words, when positioning the standard size recording sheet 92, the friction braking member 85A is disposed on the rack 80 so as to be positioned between the friction braking member 75A and the friction braking member 75B.
[0065]
Therefore, the friction braking member 75 is slightly weaker than the friction braking member 85A and presses against the rib 78.
[0066]
Further, FIG. 4 shows a state in which the standard size recording paper 94 that is slightly smaller than the recording paper 92 in FIG. 3 is positioned by the positioning members 50 and 60 from the bottom surface direction (the direction of arrow B in FIG. 1) ( For example, the longitudinal direction of A5 size or the width direction of A4 size).
[0067]
In this case, the friction braking member 75B is arranged on the rack 70 so that the friction braking member 75B matches the meshing position of the pinion 46 and the rack 70. Here, the reaction portion of the rack 70 by the friction braking member 75 </ b> B is pressed by the pinion 46, and the friction braking member 75 </ b> A is strongly pressed against the rib 78.
[0068]
On the other hand, on the rack 80 side, each friction braking member 85 is disposed on the rack 80 so that the friction braking member 85 does not match the meshing position of the pinion 46 and the rack 80. However, the friction braking member 85A is at a position that also satisfies the conditions described in FIG.
[0069]
In other words, when positioning the standard size recording paper 94, the friction braking member 75B is disposed on the rack 70 so as to be positioned between the friction braking member 85A and the friction braking member 85B.
[0070]
Therefore, the friction braking member 85 is slightly weaker than the friction braking member 75B and presses against the rib 88.
[0071]
As described above, in the first embodiment, when the positioning members 50 and 60 slide, when the friction braking member of one rack is in the meshing position of the pinion 46 and the rack, the friction braking member of the other rack It arrange | positions so that it may not be located in a meshing position.
[0072]
Thereby, each of the friction braking members 75 and 85 does not overlap with the meshing position with the pinion 46 at the same time, and the difference in friction force generated between the friction braking members 75 and 85 and the ribs 78 and 88 can be reduced.
[0073]
Therefore, the amount of change in braking force by the friction braking members 75 and 85 is reduced, and the operability of the positioning members 50 and 60 is improved.
[0074]
Further, the friction braking members 75 and 85 are friction braking members provided in one of the racks 70 and 80 when the positioning members 50 and 60 align the positions of the standard size recording sheets 90, 92 and 94. One of 75 and 85 is arranged so as to be in a meshing position with the pinion 46.
[0075]
For this reason, when the positioning members 50 and 60 are slid to the standard size positions of the recording sheets 90, 92, and 94, the braking force of any one of the friction braking members 75 and 85 is increased.
[0076]
Therefore, the positioning members 50 and 60 can be easily stopped at the fixed size position, and the operability of the positioning members 50 and 60 is further improved.
[0077]
Furthermore, in this standard size position, since any one of the friction braking members 75 and 85 is in the meshing position with the pinion 46, the holding force of the positioning members 50 and 60 is kept strong and constant.
[0078]
Therefore, even if the vibration when the sheet plate 30 is moved up and down or the force of pulling out obliquely when feeding the sheet works strongly, the positioning members 50 and 60 can be prevented from moving outward.
[0079]
Therefore, the cause of feeding or oblique feeding in the state where the centers of the recording sheets 90, 92 and 94 are shifted is eliminated.
[0080]
(Second Embodiment)
Next, a second embodiment of the present invention will be described. In this second embodiment, since it is almost the same as the configuration described in the first embodiment, the same components are denoted by the same reference numerals, and the description of the configuration is omitted.
[0081]
The feature of the second embodiment relates to the shape of the friction braking member in the paper feed mechanism.
[0082]
FIG. 6 shows friction braking members 105 and 115 of the paper feed mechanism 100 according to the second embodiment of the present invention.
[0083]
The friction braking members 105 and 115 are arch-shaped members that are both supported by the racks 70 and 80, and are integrated with the racks 70 and 80.
[0084]
Since the friction braking members 105 and 115 are both supported by the racks 70 and 80, the pressure contact state to the ribs 78 and 88 is made stronger than the friction braking members 75 and 85 in the first embodiment. The
[0085]
Therefore, in the second embodiment using the friction braking members 105 and 115, the holding force of the positioning members 50 and 60 at the fixed size position can be kept stronger.
[0086]
(Third embodiment)
Next, a third embodiment of the present invention will be described. In the third embodiment, since it is almost the same as the configuration described in the first embodiment, the same components are denoted by the same reference numerals, and the description of the configuration is omitted.
[0087]
The feature of the third embodiment relates to the shapes of the friction braking member and the rib in the paper feeding mechanism.
[0088]
FIG. 7 shows friction braking members 125 and 135 and ribs 128 and 138 of the paper feed mechanism 120 according to the third embodiment of the present invention.
[0089]
The friction braking members 125 and 135 are arch-shaped members that are cantilevered by the racks 70 and 80 as in the first embodiment, and are integrated with the racks 70 and 80. However, convex portions 127 and 137 are formed outwardly at the convex end portions 126 and 136 of the friction braking members 125 and 135, respectively.
[0090]
On the other hand, the ribs 128, 138 are provided with recesses 129, 139 in which the protrusions 127, 137 of the friction braking members 125, 135 can be fitted at the engagement positions of the pinion 46 and the racks 70, 80.
[0091]
Here, as in the first embodiment, the friction braking members 125 and 135 are either of the friction braking members 125 and 135 when the positioning members 50 and 60 align the positions of the standard size recording sheets 90, 92, and 94. The racks 70 and 80 are arranged so that one of them is in a meshing position with the pinion 46.
[0092]
With such a configuration, when the positioning members 50 and 60 are in the standard size positions, any one of the convex portions 127 and 137 of the friction braking members 125 and 135 becomes the concave portions 129 and 139 of the ribs 128 and 138. Mating.
[0093]
For this reason, when the positioning members 50, 60 are slid to the standard size position, the projections 127, 137 and the concave portions 129, 139 can be reliably stopped at the standard size position by fitting the positioning members 50, 60. Usability is further improved.
[0094]
Furthermore, in this standard size position, since the convex parts 127 and 137 are fitted in the concave parts 129 and 139, the positioning members 50 and 60 are reliably kept in the standard size position.
[0095]
In the present embodiment, convex portions are formed on each friction braking member, and the positions of the concave portions provided on the ribs are arranged in accordance with the meshing positions of the pinion and the rack.
[0096]
However, the number and position of the convex portions and the concave portions are not limited to this. For example, a convex portion may be provided only on the friction braking member located on the front end side of each rack, and a plurality of concave portions may be arranged in accordance with the position where the friction braking member stops at the standard size position of each recording sheet.
[0097]
Further, in the present embodiment, a convex portion is provided on the friction braking member side and a concave portion is provided on the rib side. However, the combination of a convex part and a recessed part is not limited to this, It is good also as a combination which provides a recessed part on the friction braking member side and a convex part on the rib side.
[0098]
In any of the above-described embodiments, the paper feed mechanism of the present invention has been described using the paper cassette loaded in the image forming apparatus.
[0099]
However, the paper feed mechanism of the present invention is not limited to this paper cassette, and can be installed in a paper manual tray or the like in which a sheet member is manually inserted, and has a similar function. .
[0100]
【The invention's effect】
Since the sheet feeding mechanism of the present invention has the above configuration, the operability of the positioning member for positioning the sheet member such as recording paper is good, and the positioning member can be held at a predetermined position, so that the center of the sheet member is shifted. The cause of feeding in an inclined state or oblique feeding is eliminated.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a paper cassette including a paper feed mechanism of the present invention.
FIG. 2 is a bottom view showing a paper feed mechanism according to the first embodiment of the present invention.
FIG. 3 is a bottom view showing a paper feed mechanism according to the first embodiment of the present invention.
FIG. 4 is a bottom view showing the paper feed mechanism according to the first embodiment of the present invention.
FIG. 5 is a plan view showing a friction braking member according to the first embodiment of the present invention.
FIG. 6 is a plan view showing a friction braking member according to a second embodiment of the present invention.
FIG. 7 is a plan view showing a friction braking member according to a third embodiment of the present invention.
FIG. 8 is a bottom view showing a conventional paper feed mechanism.
FIG. 9 is a bottom view showing a conventional paper feed mechanism.
FIG. 10 is a bottom view showing a conventional paper feed mechanism.
[Explanation of symbols]
10 Paper Feeding Mechanism 20 Paper Feeding Table (Table)
46 pinion 50 positioning member 60 positioning member 70 rack 75 friction braking member (braking member)
75A Friction braking member (braking member)
75B Friction braking member (braking member)
75C Friction braking member (braking member)
78 Rib (guide part)
80 rack 85 friction braking member (braking member)
85A Friction braking member (braking member)
85B Friction braking member (braking member)
85C Friction braking member (braking member)
88 ribs (guide section)
100 Feeding mechanism 105 Friction braking member (braking member / protruding portion)
115 Friction braking member (braking member / protruding portion)
120 Paper feeding mechanism 125 Friction braking member (braking member)
127 Convex part (hook part)
128 ribs (guide section)
129 Concave part (hook part)
135 Friction braking member (braking member)
137 Convex part (hook part)
138 Rib (guide part)
139 Recess (Hook)

Claims (4)

  1. A table on which the sheet member is placed, a pair of positioning members that are slidably mounted on the table and are in contact with the sheet member from both sides to adjust the position, and are moved along a guide portion connected to the positioning members In a paper feed mechanism comprising a pair of racks, a pinion that meshes with the pair of racks, and a braking member that is provided in the rack and generates a braking force between the racks, the meshing position with the pinion The sheet feeding mechanism is arranged such that when there is a braking member of one rack, the braking member of the other rack is not positioned at the meshing position.
  2. When the sheet member is adjusted to a standard size position by the pair of positioning members, the braking member provided in one of the pair of racks is arranged to be in a meshing position with the pinion. The paper feed mechanism according to claim 1.
  3. The sheet feeding mechanism according to claim 1, wherein the braking member is an arch-shaped projecting portion having elasticity that is supported at both ends, and generates a braking force by slidingly contacting the guide portion.
  4. The braking member is provided with a hook portion at a contact portion with the guide portion, and the guide portion is provided with a hook portion into which the hook portion is fitted. The sheet feeding device according to any one of claims 1 to 3, wherein when the sheet member is adjusted to a fixed size position by a positioning member, the catch portion is disposed at a position where the sheet member is fitted. mechanism.
JP35829698A 1998-12-16 1998-12-16 Paper feed mechanism Expired - Fee Related JP3690152B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP35829698A JP3690152B2 (en) 1998-12-16 1998-12-16 Paper feed mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35829698A JP3690152B2 (en) 1998-12-16 1998-12-16 Paper feed mechanism

Publications (2)

Publication Number Publication Date
JP2000177850A JP2000177850A (en) 2000-06-27
JP3690152B2 true JP3690152B2 (en) 2005-08-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP35829698A Expired - Fee Related JP3690152B2 (en) 1998-12-16 1998-12-16 Paper feed mechanism

Country Status (1)

Country Link
JP (1) JP3690152B2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4587819B2 (en) * 2005-01-28 2010-11-24 京セラミタ株式会社 Intermediate tray for duplex printer
JP4958646B2 (en) * 2007-06-08 2012-06-20 キヤノン電子株式会社 Sheet regulating device, and sheet feeding device and image reading device including the device
JP5012352B2 (en) * 2007-09-18 2012-08-29 セイコーエプソン株式会社 Paper guide device
JP5479057B2 (en) * 2009-12-03 2014-04-23 キヤノン株式会社 Sheet material feeding apparatus and image forming apparatus
JP5099177B2 (en) 2010-06-17 2012-12-12 ブラザー工業株式会社 Sheet guide
JP5927920B2 (en) * 2012-01-13 2016-06-01 富士ゼロックス株式会社 Medium conveying apparatus, post-processing apparatus, and image forming apparatus
JP6287903B2 (en) * 2015-03-13 2018-03-07 京セラドキュメントソリューションズ株式会社 Sheet supply apparatus and image forming apparatus having the same

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