JPH11139576A - Sheet material feeding device and image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability of a sheet maternal, prevent oblique moving of the sheet material and improve paper passing performance by providing a rib pressing the feeding direction downstream side of the stored sheet material against a reference side part of a width regulating means in a rear end regulating means. SOLUTION: Even when the loading of a sheet material S is not fairly aligned in a width direction, a projection pressing only a sheet material S to be fed next and a sheet material S of a loading upper part in the vicinity is provided on the upper part on a sheet material carrier direction downstream side of a plate spring. Therefore, the carrier direction downstream side of the sheet material S is pressed and this sheet material is pressed and tightly attached to a width regulating plate on a reference side. By slightly revolving the sheet material S loaded on an intermediate plate 7a in the direction that the sheet material S is pressed against the carrier direction downstream side at the tip of the width regulating plate on the side of an image writing reference of a sheet material width direction by a rib 5h, the sheet material S is conformed to the width regulating plate, an image forming location by an image forming part is made easy to be determined by the width regulating plate and accuracy is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding apparatus used for a printer, a copying machine, and the like, and an image forming apparatus using the same.

[0002]

2. Description of the Related Art At present, image forming apparatuses, such as printers and copiers, for feeding a sheet material to form an image are widely used. Generally, a feeding device is provided so that a large number of sheet materials can be automatically fed.

In a sheet material feeding apparatus, for example, both ends in the width direction of a sheet material housed in a cassette are regulated by a width regulating plate, and a rear end of the sheet material is regulated by a rear end regulating plate. Sheet is separated and fed by a separation claw and a separation roller including a feed roller and a retard roller.

[0004]

With the spread of image forming apparatuses, there is a demand for a sheet feeding apparatus which is easier to handle, has lower cost, and has good paper passing performance.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a sheet feeding apparatus which has good operability and paper-passing performance and can reduce costs, and an image using the same. A forming apparatus is provided.

[0006]

In order to achieve the above object, a typical configuration according to the present invention is a sheet material feeding apparatus having a sheet material storage cassette, wherein a sheet material stored in the sheet material storage cassette is removed. A rear end regulating unit that regulates the rear end in the feeding direction, and a width regulating unit that regulates the width direction of the sheet material, wherein the width regulating unit abuts one side in the width direction of the sheet material, and a reference side portion. An urging side portion having urging means for urging the sheet to the reference side portion, wherein the downstream side in the feeding direction of the sheet material stored by the rear end regulating means is located at the reference side portion of the width regulating means. A rib for pressing is provided.

In the above configuration, when the sheet material is set in the cassette, the sheet material easily follows the positioning reference, and the sheet passing performance of the sheet material is improved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIG. 1 is an explanatory view of a sheet material feeding device in an image forming apparatus, wherein 1 is an image forming device, 2 is a sheet material feeding device, and 3 is a sheet material. Sheet material storage cassettes 4a and 4b in the feeding device are width regulating plates for regulating the width direction of the sheet material, 5a is a rear end regulating plate for regulating the rear end of the sheet material, and 6a and 6b are engaged with the width regulating plates. A sheet pressing means rotatable in the vertical direction at fulcrum positions 6c and 6d; S, a sheet stored in a sheet storing cassette; 7a, a middle plate on which the sheet is placed;
Is a rotation center thereof, and 8 is an urging spring which overcomes the weight of the sheet material and gives a sheet feeding force, and is engaged by the sheet material pressing means.

A sheet feed signal is output from the controller, and a pickup roller 10 serving as a feed roller rotates to pick up the sheet material S. After a predetermined time, the feed roller 11 is driven in the sheet conveying direction, and the sheet is guided by the conveying guide 9 and conveyed to the conveying roller pair 13 and the conveying roller pair 14 accordingly. In the sheet feeding apparatus of the present embodiment, reference numeral 12 denotes a retard roller, which separates the sheet. The image is transferred to the conveyed sheet material by the image forming unit 15, the image is fixed by the fixing device 16, discharged from the image forming apparatus by the conveying rollers 17 and 18, and the sheet material is stacked on the paper discharge unit 19.

FIG. 2 is a perspective explanatory view of the sheet material storage cassette 3 and shows its outline. The stacked and stored sheet materials S are regulated by left and right width regulating plates 4a and 4b, and the width regulating plates are cut off by a rack, and are pinched by a pinion gear 40 (FIG. 3).
See). The lock of the width restriction is formed integrally with the cassette tray, or the racks 4h and 4g are integrally formed with the washing plate-like rack 4h and the rack 4g, which is integral with or separate from the lever 4f, by the urging spring 4e. Locked to a free position in units of pitch. However, with standard sizes such as A4 and B5, the user can be informed of the lock position in advance by the click feeling. Further, when an image is to be formed on such a non-standard-size sheet material, the lock is provided at the free position by engagement of a fine rack so that the lock can be performed at the left and right free positions. In order to set a sheet of such irregular-shaped sheet material, the sheet material pressing means 6a and 6b are provided with the width and length positions of the sheet material (
The marking line is provided as a mark so that the (corner position) comes to that location. As a result, the width control plate is tightened and locked against the sheet material more than necessary, thereby avoiding the problem of causing the sheet material feeding failure, and enabling the conveyance of irregular-size paper and improving the setting performance. , The usability is improved. As long as the mark is confirmed, the marking line may be a marking line or a method using a step of the shape.

FIG. 3 is a detailed explanatory view in a top view of a sheet material storage cassette in which no sheet material is stored. In the figure, reference numeral 12 denotes a retard roller, the drive of which is transmitted by a gear 12c from a pendulum gear (not shown) provided in the sheet material feeding device, always in a direction opposite to the sheet material conveying direction,
The torque is transmitted from the gear 12c to the retard roller via the joint 12d and the torque limiter 12b as a load torque generating means. The retard roller 12 comes into pressure contact with the feed roller 11 by inserting the sheet material cassette to a predetermined position, and functions as a sheet material separating unit. Further, a separation sheet 7c is affixed to the middle plate 7a on which the sheet material is directly stacked, at a location facing the pickup roller 10.

Reference numeral 24 denotes a size setting dial for setting the size of the sheet material, and a mechanism for notifying the image forming apparatus side of the sheet material size by setting this according to the size of the sheet material used by the user (see FIG. ) To transmit the sheet material size to the controller. Reference numeral 25 denotes an operation label showing a method of operation. Reference numeral 30 denotes a projection formed by drawing on the bottom surface of the width regulating plates 4a and 4b, which enters into a groove 35 formed in the cassette 3 and is guided by the groove 35 so that the width regulating plates 4a and 4b are moved in the width direction. Go to

When the width regulating plates 4a and 4b are set to the maximum sheet material width, the center of the two projections 30 is a pinion.
By aligning the pinion 40 with the center of the pinion 40, it is easy to visually prevent a mistake in attaching the pinion 40 by shifting the phase of the rack of the width regulating plates 4a and 4b during assembly.

In this embodiment, as shown in FIGS. 1 and 4, a hole 3a is formed in the bottom of the cassette 3 where the gap between the middle plate 7a and the bottom of the cassette is small (in this embodiment, the rear side of the cassette). Is provided. This hole 3a allows foreign matter to enter the cassette 3 when paper is set in the cassette 3 and the like, and if the foreign matter enters between the middle plate 7a and the bottom of the cassette, the foreign matter is discharged from the hole 3a to the outside of the cassette. By providing the hole 3a, it is possible to easily remove the foreign matter that has entered the narrow gap. If a slope 3c for guiding foreign matter to the hole 3a is provided at the bottom of the cassette connected to the hole 3a, the foreign matter can be more easily taken out from the hole 3a.

Numeral 26 denotes a cover which also serves as a sheet material passage surface for guiding the sheet material from the cassette to the separation roller, and is attached so as to be rotatable around an axis parallel to the rotation axis of the retard roller 12, and 26 in FIG. As shown by ′, the retard roller 12 and the torque limiter 12b can be removed from the shaft in the width direction for replacement by opening the opening. Further, the sheet feeding device is provided with a projection 50 as a contact portion so that the cover 26 closes when the cassette is inserted into the sheet feeding device. Here, the protrusion 50 may be not only a rigid one but also an elastic one such as a leaf spring. still,
The cover 26 may be provided with a chamfer in a direction that does not catch other mechanisms when the cassette is pulled out.

As shown in FIG. 5, a spare storage portion is provided under the cover 26 so that the replacement retard roller 12e can be stored therein, so that the replacement parts can be prevented from being lost or damaged. At this time, by providing a fixing portion such as a rib 27 on the surface of the cover 26 opposite to the sheet material passing surface, the replacement retard roller 12e is simply fixed so as not to move around.

Reference numeral 45 in FIG. 6 is a guide member for guiding the sheet material fed by the pickup roller 10 to a sheet material separating roller composed of a feed roller 11 and a retard roller 12, and is a diagram viewed in a cross section shown in FIG. As described above, the front end portion has a locking projection, and can be locked by one-touch by being inserted into the cassette 3, and is configured to cover a part of the retard roller 12 in the locked state. When the cassette 3 becomes large due to handling a large amount of sheet material as in the present embodiment, it is difficult to form such a guide surface by integral molding with the cassette 3 due to the strength of a molding die, molding cycle, and the like. Becoming
Further, since there is a problem that it is difficult to improve the accuracy of the guide surface, for example, as shown in FIG. 7, conventionally, for example, the ribs 45a were formed as separate members as in the present embodiment. The above problem is solved by
Even if it is formed integrally with the cassette 3 as in the case of the section, the strength can be reduced by providing a punched hole, etc., and the sheet material can be formed without being affected by the direction in which the mold is removed. It is possible to optimize the shape of the guide surface for feeding the sheet material to the means.

FIG. 8 is an explanatory view showing a conventional example of the rear end regulating plate 5a of the present embodiment. The rear end regulating plate 5a1 for supporting the end surface of the sheet bundle and the lower surface of the sheet material made of sheet metal are in contact with each other. The rear end regulating plate 5a2 is formed of L
It is bent in the shape of a letter and goes to the back side of the rear end regulating plate 5a1 to reinforce the rear end regulating plate 5a1. Rear end regulating plate 5a1
And a gap 5 between the rear end regulating plate 5a2 due to component accuracy.
i is empty, and the trailing edge of the sheet material may enter into it, resulting in poor paper feed or poor image printing accuracy. FIG. 9 is an explanatory diagram showing the trailing edge regulating plate 5a of the present embodiment. The lower portion of the front end of the rear end regulating plate 5a1 is extended to the end of the rear end regulating plate 5a2 and serves as an index 5g indicating a standard size sheet material size display 7f displayed on the middle plate 7a. With this configuration, the obstacle caused by the entry of the sheet material is removed, and the same surface as the surface of the rear end regulating plate 5a1 that contacts the sheet material is located at the index 5g. As shown in (5), the rear end of the sheet material, the indicator 5g, and the sheet material size display 7f of the middle plate 7a are located at the same position, and it is easy to confirm the sheet material size, and the operability is improved. In addition to displaying the size of the sheet material, if a scale indicating the size of the sheet material is provided, the setting of the trailing end regulating plate 5a for a sheet material having an irregular size is also improved. In FIG. 9, 5h is a rib formed integrally with the rear end regulating plate 5a1, and 5c is a claw that presses the upper surface of the sheet material S also formed integrally with the rear end regulating plate 5a1.
Although the rear end regulating plate 5a is made of plastic in the present embodiment, it may be made of sheet metal,
c is not limited to being integrally formed with the rear end regulating plate 5a, but may be constituted by another member.

In the sheet feeding apparatus using a cassette as in this embodiment, a width regulating plate on a reference side portion in the width direction of the image is used to define the transfer position of the image onto the sheet material in the width direction by the image forming section. In addition, as shown in FIG. 11, the sheet material is pressed by a leaf spring 4u attached to the width regulating plate 4a on the opposite biasing side, but it is applicable to a wide variety of sheet materials as in the present embodiment. In the case of a cassette to be weighed, if the force of the spring is determined in accordance with the sheet material having a large weight, the sheet material having a light weight may bend and cause a feeding failure. In the vicinity of the separating claw, which constitutes, a spring having a very large force cannot be formed. Therefore, the sheet material does not always adhere to the width regulating plate when the weight of the sheet material is heavy or when the load capacity is large.
As a result, the printing accuracy may be reduced.

In order to solve this problem, according to the present embodiment, even if the stacking of the sheet materials is not well-aligned in the width direction, only the next sheet material to be fed and the sheet material at the upper portion of the stack near the sheet material are fed. By providing the pushing protrusion 4v on the upper portion of the leaf spring 4u on the downstream side in the sheet material transport direction, the downstream side in the sheet material transport direction can be pushed, and can be pressed against and adhered to the width regulation plate on the reference side.

Further, the ribs 5h shown in FIG.
As shown in FIG. 12, a direction in which the sheet material S stacked thereon is pressed against the leading end of the width regulating plate 4b on the image writing reference side in the sheet material width direction in the image forming apparatus of the present embodiment, on the downstream side in the transport direction. By slightly rotating the sheet material S to the width regulating plate 4b, the image forming position by the image forming unit 15 can be easily determined by the width regulating plate 4b, and the accuracy can be improved.

A mark 5 as shown in FIG.
The upper limit of the stacking height of the sheet material S is indicated to the user by f or the like, and the sheet material S is not stacked up to the claw 5c. However, the user does not notice or it is difficult to see and it is difficult to set the sheet material. And so on. This is the case even when the pickup rollers 10 are arranged skewed in the width direction of the sheet material as shown in FIG. 13 or when they are arranged symmetrically as shown in FIG. Nail 5c1
If the sheet resistance is increased due to too much sheet material being loaded on the lower surface of the sheet, a rotational moment is generated at the time of picking up the sheet material S, and since there is no pickup roller for conveying the moment in a direction to cancel the moment, the sheet material is tilted, resulting in an image. This is because there was an adverse effect such as a decrease in the formation position accuracy. However, in this embodiment, as shown in FIG.
By arranging the pickup rollers 10 on both outer sides as viewed from the sheet material 5c2 conveying direction, the influence of the rotational moment due to the conveying resistance can be reduced. Further, as shown in FIG. 16, by arranging pickup rollers on both sides of the pawls 5c1 and 5c2 as viewed from the conveying direction of the sheet material S, the pick-up roller 10 moves the sheet material S from below the pawl 5c1 which is a conveying resistance. It can be pulled out in parallel, and the rotational moment can be minimized. In this embodiment, such an arrangement of the pickup roller 10 and the upper limit of the stacking height of the sheet material S under the claw 5c are provided below the claw 5c even if there is no display such as the mark 5f. The user can easily notice the limit of the stacking height of the sheet material S when the sheet material S no longer fits, and thus the operability can be improved. Conventionally, the mark 5f is sometimes expressed by a sticker or the like printed in a conspicuous color so that the user can recognize the mark 5f. However, in the present embodiment, such a member is unnecessary and cost reduction can be achieved. It becomes possible. It is more preferable that the operation label 25 shown in FIG. 3 be displayed to indicate that the claw 5c is at the upper limit of the stacking height of the sheet material.

FIG. 17 is an explanatory view of the rear end regulating plate 5a viewed from the opposite side (rear side) of the surface in contact with the sheet material S. Reference numeral 7g denotes a slidable rear end mounted on the middle plate 7a. Control plate 5
a guide member having a washing plate-like rack 7d on the surface. Reference numeral 5d denotes a lever attached to the rear end regulating plate 5a, which has a rack 5b and has a rack 7d by an urging spring 5e.
Engage with the rear end regulating plate 5a in units of the pitch of the rack 7d.
Can be locked in any position. Further, as shown in FIG. 18 in detail, one end 5 of the biasing spring 5e is provided.
The j is extended and the recess 7e is a concave portion on the guide member 7g.
(See FIG. 17), and is configured to be elastically detachable. And the hollow 7
If the rear end regulating plate 5a is set to a position of a standard size such as A4 or B5 when the rear end regulating plate 5a is slid, the spring end enters the recess 7e when the rear end regulating plate 5a is slid. The lock position in the standard size can be notified with a click feeling.

By adopting such a configuration, it is possible to use a sheet material of a non-standard size while preventing an increase in cost due to attaching a separate member, and it is possible to easily use a sheet material of a standard size. .

FIG. 19 is a detailed explanatory view of the vicinity of the sheet material holding means. Reference numeral 20 denotes a lifter for holding the sheet material holding means 6b at a raised position. The lifter 20 is connected to the cassette 3 (not shown in FIG. 19) by a shaft 22. It is rotatably engaged and is urged by the spring 23 toward the sheet material pressing means 6b.

FIG. 20 is an explanatory view as viewed from the direction of movement of the width regulating plate. The lifter 20 shows a state in which the cassette 3 is pulled out from the sheet material feeding device 2, and the intermediate plate 7a is lifted by the urging spring 8, and The lifter 20 urged by the spring 23 to lift the material pressing means 6b upward enters under the sheet material pressing means 6b, and in this state, even if the intermediate plate 7a is lowered to load the sheet material, the sheet material pressing means 6b does not fall down. A lifter 20 'indicated by a dotted line indicates a state in which the cassette 3 is mounted on the sheet feeding device 2, and the lever 21 of the lifter 20 is pushed down by a member (not shown) in the sheet feeding device 2 to fall down. As shown in the figure, the sheet material pressing means 6b does not prevent the sheet material pressing means 6b from descending, and the feeding operation can be performed. The lever 21 also has a function as a stopper that abuts on the cassette 3 so as to stop at a predetermined position when the lifter 20 is urged by the spring 23.

Conventionally, as shown in FIG. 21, the arm portion of the sheet material holding means 6b is supported so that in a cassette in which the width regulating plate moves as in this embodiment, the width of all sheet materials is limited. This sheet material holding means 6b could not be supported. However, as in the present embodiment, the length of the lifter 20 is increased in the moving direction of the width regulating plate 4b and the front end of the sheet material pressing means is supported, so that the sheet material of the lifter 20 can be moved over the entire area where the width regulating plate 4b moves. The function of preventing the holding means 6b from falling can be obtained. With this configuration, when the user attempts to set the sheet material, the sheet material holding means 6b is lifted and the sheet material is held by the sheet material holding means. The effect of facilitating the operation of dipping under the sheet 6b can be obtained in a cassette such as the present embodiment corresponding to sheet materials of various widths.

Although not shown in the drawing, the same configuration is also possible on the opposite side of the width regulating plate 4a and the sheet material pressing means 6a.

FIG. 22 is an explanatory view of another configuration of the lifter 20. The lifter 20 shown in FIG.
In the same manner as described above, it has a function of supporting and not supporting the sheet material pressing means. In FIG. 20, reference numeral 4j designates a cover for covering the end of the width regulating plate 4b made of sheet metal. Reference numeral 4k designates the middle plate 7a and the sheet material S pushed down by the pickup roller 10 during the sheet feeding operation. A stopper for preventing the sheet material pressing means 6b from coming into contact with the fixing shaft 4l of the metal sheet material pressing means 6b to generate noise when the sheet material pressing means 6b is lifted upward by the spring 8.
It is made of an elastic member such as plastics or rubber such as PC, and comes into contact before the sheet material pressing means 6b comes into contact with the shaft 41, so that it is sandwiched between the width regulating plate 4b and the cover 4j. Are located. Reference numeral 4i denotes a projection provided on the width regulating plate 4b made of sheet metal by drawing the sheet metal, and has a height such that a gap of about 0.5 mm is formed between the width regulating plate 4b and the sheet material pressing means 6b. In the case of a cassette in which the width regulating plate 4b moves largely in the width direction to accommodate sheet materials having various widths as in the present embodiment, the user uses the side wall of the cassette as a cover to allow the user to hold the sheet material pressing means 6.
b, it is difficult to apply pressure by applying pressure to prevent plastic deformation.
May be extended to cover the sheet material holding means 6b. However, since the cover 4j is made of plastic or the like for the purpose of concealing the end of the sheet metal, the strength of the cover 4j is reduced. There have been problems such as insufficiency, a large part shape, and high cost. But,
In the present embodiment, with the above-described configuration, even if the user touches and applies pressure without additional cost, it can be avoided by contacting the protrusion 4i before stopping plastic deformation and stopping the deformation.

[Second Embodiment] FIG. 23 is an explanatory view of a second embodiment according to the present invention, and is a view of the width regulating plate as referred to in the first embodiment as viewed from above. An operation section 4m and a size display section 4n are formed integrally with a cover 4j on the upper portion of the sheet 4b, and the current sheet material size can be known by pointing to the sheet material size display 3b engraved on the cassette 3. It has become.
Further, when the width regulating plate 4b is made of sheet metal, the cover 4j has a function of protecting the user from the end portion, and can be clearly indicated to the user by being colored by indicating the operation portion. . 4o is the cover 4
It is a nail integrally formed with j. When the claw 4j is not provided, as shown in FIG. 24, for example, as shown in FIG. 24, the sheet material S is tilted for some reason, and its end is turned over to exceed the height of the width regulating plate. Therefore, there is a possibility that the width regulating plate 4b cannot exhibit the correcting ability. On the other hand, the presence of the claw 4o prevents the end of the sheet material from exceeding the height of the width regulating plate, thereby minimizing the inclination.

FIG. 25 is an explanatory view of the width regulating plate 4b as viewed from the side. The operating portion 4m is formed by ribs as shown in the figure, thereby facilitating the production in the case of molding with a mold. In addition, it is possible to balance the shape as the operation unit.

[0032]

According to the present invention, as described above, the operability of setting the sheet material can be improved, and the skew of the sheet material can be prevented to improve the paper passing performance. In addition, it is possible to reduce the number of parts and reduce costs.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a sheet feeding device in an image forming apparatus.

FIG. 2 is an explanatory perspective view of a sheet material storage cassette.

FIG. 3 is a detailed explanatory view in a top view of a sheet material storage cassette in which no sheet material is stored.

FIG. 4 is an explanatory diagram of a cover opening / closing operation.

FIG. 5 is an explanatory diagram of a storage state of a preliminary retard roller.

FIG. 6 is an explanatory diagram of a guide member for a sheet separating unit.

FIG. 7 is a conventional explanatory view of a guide member for a sheet separating unit.

FIG. 8 is an explanatory view showing a conventional example of a rear end regulating plate.

FIG. 9 is an explanatory view showing a rear end regulating plate.

FIG. 10 is an explanatory top view of a rear end regulating plate.

FIG. 11 is an explanatory diagram of a sheet material biasing configuration in the width regulating means.

FIG. 12 is an explanatory diagram showing a state in which a sheet material is pressed by a rear end regulating plate.

FIG. 13 is a conventional explanatory view showing a relationship between a claw of a rear end regulating plate and a pickup roller.

FIG. 14 is a conventional explanatory view showing a relationship between a claw of a rear end regulating plate and a pickup roller.

FIG. 15 is an explanatory diagram illustrating a relationship between a claw of a rear end regulating plate and a pickup roller.

FIG. 16 is an explanatory diagram showing a relationship between a claw of a rear end regulating plate and a pickup roller.

FIG. 17 is an explanatory diagram of the rear end regulating plate as viewed from the opposite side (rear) of the surface in contact with the sheet material.

FIG. 18 is an explanatory rear view of the rear end regulating plate.

FIG. 19 is a detailed explanatory view of the vicinity of a sheet material pressing means.

FIG. 20 is an explanatory diagram as viewed from a width regulating plate moving direction.

FIG. 21 is a conventional explanatory view near the sheet pressing means.

FIG. 22 is an explanatory diagram of another configuration of the lifter.

FIG. 23 is an explanatory diagram near the width regulating means of the second embodiment.

FIG. 24 is an explanatory view showing the vicinity of a width regulating unit according to the second embodiment.

FIG. 25 is an explanatory diagram of a width regulating plate according to a second embodiment as viewed from a side.

[Explanation of symbols]

 S ... sheet material 1 ... image forming device 2 ... sheet material feeding device 3 ... sheet material storage cassette 3a ... hole 3b ... size display 3c ... slope 4a ... width regulating plate 4b ... width regulating plate 4e ... urging spring 4f ... Lever 4g ... Rack 4h ... Rack 4i ... Protrusion 4j ... Cover 4k ... Stopper 4l ... Fixing shaft 4m ... Operation part 4n ... Size display part 4o ... Claws 4u ... Leaf spring 4v ... Protrusion 5a ... Rear end regulating plate 5a1 ... Rear end Control plate 5a2… Rear end control plate 5b… Rack 5c… Claw 5c1… Claw 5c2… Claw 5d… Lever 5e… Energizing spring 5f… Mark 5g… Index 5h… Rib 5i… Gap 5j… End 6a… Sheet pressing means 6b ... sheet material pressing means 6c, 6d ... fulcrum position 7a ... middle plate 7b ... rotation center 7c ... separation sheet 7d ... rack 7e ... recess 7f ... sheet material size Display 7g… Guide member 8… Biasing spring 9… Transport guide 10… Pickup roller 11… Feed roller 12… Retard roller 12b… Torque limiter 12c… Gear 12d… Joint 12e… Retard roller 13… Transport roller pair 14… Transport roller pair 15… Image forming unit 16… Fixer 17, 18… Convey roller 19… Discharge unit 20… Lifter 21… Lever 22… Axis 23… Spring 24… Size setting dial 25… Operation label 26… Cover 27… Rib 30 35 ... groove 40 ... pinion gear 45 ... guide member 45a ... rib 50 ... projection

Claims (18)

[Claims] 1. A sheet feeding device having a sheet material storage cassette, a rear end regulating means for regulating a rear end in a feeding direction of a sheet material stored in the sheet material storage cassette, and a width direction of the sheet material. A width regulating means for regulating, and a reference side portion in which the width regulating means abuts one side in the width direction of the sheet material, and a biasing side portion having biasing means for biasing the sheet to the reference side portion. And a rib for pressing a downstream side in a feeding direction of the sheet material stored in the rear end regulating means against a reference side portion of the width regulating means. 2. A sheet feeding device having a sheet material storage cassette, a rear end regulating means for regulating a rear end of a sheet material stored in the sheet material storage cassette in a feeding direction, and feeding the sheet material. A feed roller; and a claw portion for restricting an upper portion of the stacked sheet material is provided on the rear end regulating means, and at least one feed roller is disposed on both sides of the claw portion in the sheet material width direction. A sheet material feeding device characterized by being provided. 3. The sheet feeding device according to claim 2, wherein the feeding rollers are disposed at substantially equal intervals around the claw portion in a sheet material width direction. 4. The sheet material feeding device according to claim 2, wherein said claw portion constitutes an index of an upper limit of the number of sheet materials to be stacked. 5. A sheet material feeding apparatus having a sheet material storage cassette, wherein a sheet member stored in the sheet material storage cassette is slid on a guide member in a sheet material feeding direction in order to regulate a rear end of the sheet material in the feeding direction. Possible rear end restricting means, and fixing means for fixing the rear end restricting means, wherein when the rear end restricting means is slid, an end of the fixing means is provided at a predetermined position of the guide member. A sheet material feeding device capable of engaging and disengaging with a concave portion with elastic force. 6. A sheet feeding device having a sheet material storage cassette, comprising: a width regulating means slidable in a sheet material width direction to regulate a width direction end of the sheet material stored in the sheet material storage cassette. A sheet material pressing means provided on the width regulating means and capable of swinging up and down; and a supporting means capable of supporting the sheet material pressing means to restrict the lowering thereof, wherein the supporting means is a sheet. The lowering of the sheet pressing means can be restricted in the entire movable area of the sheet pressing means, and the support of the sheet pressing means is released when the sheet storing cassette is mounted on the sheet feeding apparatus. Sheet material feeding device. 7. The apparatus according to claim 1, wherein said support means is rotatable about an axis parallel to a width direction of the stored sheet material, and is urged toward said sheet material holding means. 7. The sheet feeding device according to 6. 8. The sheet material feeding device according to claim 6, wherein said support means is rotatable about a vertical axis and is urged toward said sheet material pressing means. apparatus. 9. A sheet feeding device having a sheet material storage cassette, comprising: a width regulating means slidable in a sheet material width direction to regulate a width direction end of the sheet material stored in the sheet material storage cassette. A cover for covering an upper edge end surface of the width regulating means, wherein the cover has an index for displaying a size of the sheet material to be stored, and is capable of pressing an upper portion of the stacked and stored sheet material. A sheet material feeding device comprising: 10. A sheet material feeding device having a sheet material storage cassette, wherein a rear end slidable in the sheet material feeding direction to regulate a rear end of the sheet material stored in the sheet material storage cassette in the feeding direction. The rear end regulating unit is configured such that a member that receives the rear end of the stored sheet material and a member that receives the bottom surface are separate members, and the member that receives the rear end of the sheet material is A sheet material feeding device having a shape in which a lower portion at a front end is extended to an end surface in a sheet material width direction of a member for receiving the bottom surface, and an index indicating a sheet material size display. 11. A sheet material feeding device having a sheet material storage cassette, wherein width regulating means slidable in the sheet material width direction to regulate a width direction end of the sheet material stored in the sheet material storage cassette. A sheet pressing means provided on the width restricting means and capable of swinging up and down, and a diaphragm for preventing deformation of the sheet pressing means between the width restricting means and the sheet pressing means. A sheet material feeding device provided with a projection having a shape. 12. A sheet feeding device having a sheet material storage cassette, a separation roller capable of separating and feeding the sheet material in the sheet material storage cassette, and guiding the sheet material from the sheet material storage cassette to the separation roller. A sheet comprising: a guide; and the separation roller is configured to be detachable in a roller axis direction, and the guide is configured to be rotatable around an axis parallel to the roller axis so as to be opened and closed. Material feeding device. 13. When the sheet material storage cassette is stored in the apparatus main body, a projection that contacts the guide is provided,
The guide is configured to rotate in a closing direction by the contact of the projection and to be locked in a closed state, and the guide is provided with a chamfer in a direction not to be caught by another mechanism when the cassette is pulled out. Claims characterized by the following:
12. The sheet feeding device according to 12. 14. The sheet material feeding device according to claim 12, further comprising a preliminary storage portion for a separation roller that is opened and closed by opening and closing the cover, and a fixing portion for fixing the separation roller stored in the cover. apparatus. 15. A sheet feeding device having a sheet material storage cassette, a separation roller capable of separating and feeding the sheet material in the sheet material storage cassette, and guiding the sheet material from the sheet material storage cassette to the separation roller. A guide member, and the guide member is formed separately from the frame member of the sheet material storage cassette, and is configured to be insertable and lockable to the frame member, and is locked to the cassette frame member. A sheet feeding device, wherein the sheet feeding device is configured to cover a part of the separation roller. 16. A sheet feeding apparatus having a sheet material storage cassette, wherein a width control means for controlling a width direction of the sheet material stored in the sheet material storage cassette is provided, and the width control means is provided with a width of the sheet material. A reference side that abuts one side in the direction, and a biasing side that includes a biasing unit that biases the sheet against the reference side. Characterized in that a projection for pressing the sheet material to the reference side is provided. 17. A sheet feeding apparatus having a sheet material storage cassette, comprising: a middle plate for urging a sheet material stored in the sheet material storage cassette upward, and a foreign object dropping to a predetermined position of the cassette frame. Sheet feeding device, characterized in that holes for the sheet material are provided. 18. An image forming apparatus for forming an image on a fed sheet material, wherein the sheet material feeding device according to any one of claims 1 to 17, and the sheet material feeding device An image forming apparatus, comprising: an image forming unit that forms an image on a fed sheet material.