JP4786557B2 - Paper feeding cassette and image forming apparatus - Google Patents

Description

  The present invention relates to a configuration of a paper feed cassette that stores paper to be mounted on an image forming apparatus.

  Image forming apparatuses such as copiers and printers have been reduced in size and price, and various types have been proposed. For example, Patent Documents 1 and 2 show an example of an image forming apparatus in which a manual feed unit is mounted as standard, Patent Document 3 shows an example of an image forming apparatus in which the exterior of a cassette is a separate part, and Patent Document 4 shows. An example of an image forming apparatus capable of forming an image on both sides by mounting a reversing device and a conveying device on the image forming apparatus capable of forming an image on one side is disclosed.

Some conventional image forming apparatuses are equipped with a manual feed and a double-sided apparatus as standard. However, it is useless for a user who does not use these functions, and a large-sized image forming apparatus that is more expensive than necessary must be purchased. In the prior arts of Patent Documents 1 and 2, since the manual feed unit is mounted, a protrusion is formed on the right side of the image forming apparatus.
In addition, if the manual feed and the related parts of the double-sided device are provided in the cassette or the door of the image forming apparatus, the number of parts and the weight increase, resulting in poor operability. If a model having these functions and a model having no such function are separately created at the manufacturing stage, the manufacturing efficiency decreases and the cost increases.
Moreover, in patent document 3, although the exterior of a cassette is made into another part on account of component structure or a mold type | mold structure, since it is not the structure which a user can remove this exterior, there is no merit for a user. Furthermore, in Patent Document 4, in order to mount the transport unit later, the cassette has to be removed, and a partial decrease in function is inevitable.

In a general image forming apparatus, paper is often stored in a paper feed cassette and placed at the bottom of the image forming apparatus. Also, the size of the image forming apparatus is usually larger than the size of the paper to be conveyed, and in order to improve the appearance quality, the exterior surface of the paper feed cassette may be made substantially flush with the exterior surface of the image forming apparatus. Many.
For this reason, an extra space is generated between the stacking portion of the paper stored in the paper feed cassette and the exterior surface of the paper feed cassette. It is useless to have extra space only in the paper feed cassette despite the increased mounting density in the image forming apparatus.
On the other hand, the image forming apparatus has a part (replacement part) that deteriorates as the usage period increases. For example, rubber such as a feed roller and a friction pad (which reduces the friction coefficient), a filter (which causes clogging), and the like can be raised. Conventionally, these parts have been arranged and exchanged by service personnel of image forming apparatus manufacturers, but recently, users have purchased and exchanged them like home appliances.
JP 2002-187645 A Japanese Patent No. 3748444 JP 2004-315231 A JP 7-168407 A

However, if a new part is ordered and purchased after the life of the part comes, there is a problem that the image forming apparatus cannot be used sufficiently until the part arrives.
In addition, as described above, in some paper cassettes of image forming apparatuses that have been reduced in size and price, there are some in which a frame and an exterior portion of the paper cassette are configured by a single mold component. However, when this method is used, if the exterior part is dirty or damaged, it is necessary to replace the entire cassette, which makes the replacement cost expensive.
In view of the above-described circumstances, the object of the present invention is to allow the user to easily remove the exterior portion of the paper feed cassette, thereby avoiding the replacement of the entire paper feed cassette and replacing only the exterior portion. In addition to being able to cope with this, it is possible to reduce the downtime of the equipment by using the extra space to store the replacement parts. In addition, even if the image forming apparatus itself is replaced, if the configuration of the paper stacking unit is the same, only the exterior unit is replaced, and a paper feeding cassette capable of reusing the paper stacking unit and an image forming apparatus mounting the same are provided. There is to do.

In order to solve the above problems, the invention according to claim 1 is a paper feed cassette mounted on an image forming apparatus, wherein the paper feed cassette is mounted on a cassette body on which sheets are stacked and an image forming apparatus. and the exterior including the exterior surface appearing outside the image forming apparatus when the, and a detaching mechanism for coupling said cassette body and the outer portion, the detachable mechanism is fitted in the first hole The exterior portion is pivotally held with the first projecting member as a fulcrum, and the second projecting member provided so as to be manually movable engages with the second hole portion to rotate the exterior portion. It is configured to be locked .
The invention according to claim 2 is characterized in that the exterior portion includes a storage portion, and the storage portion is exposed to the outside by the rotation .
According to a third aspect of the present invention, the attachment / detachment mechanism is provided on the exterior portion and the projecting and sandwiching portion that protrudes from the opposing side surface of the cassette body and includes the first and second hole portions. An attachment member including the first and second projecting members .
The invention according to claim 4 is characterized in that the second projecting member is urged by an elastic member in a direction to engage with the second hole .

The invention according to claim 5 is characterized in that a friction pad for feeding sheets one by one by friction is disposed at a suitable position of the exterior portion.
According to a sixth aspect of the present invention, there is provided an image forming apparatus including the paper feed cassette according to any one of the first to fifth aspects .

  According to the present invention, when the exterior portion of the cassette is dirty or damaged, it is possible to avoid the replacement of the entire cassette and to replace only the exterior portion by the user. Even if the image forming apparatus itself is replaced, if the configuration of the paper stacking unit is the same, only the exterior unit can be replaced and the paper stacking unit can be reused.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view showing a first embodiment of an image forming apparatus to which the present invention is applied. In FIG. 1, an image forming apparatus 1 is an example of a quadruple tandem color laser printer. The images written on the four photoconductors 3 by the writing unit 2 are transferred to the intermediate transfer belt 4 as toner images.
On the other hand, the paper 6 set in the paper feed cassette 5 is conveyed to the paper feed roller 7 and the registration roller 8, and the toner image on the intermediate transfer belt 4 is transferred by the transfer roller 9. Thereafter, the paper 6 on which the toner image has been fixed with heat and pressure in the fixing device 10 is discharged onto the discharge tray 12 by the discharge roller 11.
Although not shown, a conveyance guide plate for guiding the paper 6 is appropriately provided between the rollers (rollers). With the configuration described so far, the image forming apparatus is configured to apply an image to one side of the paper 6.
In the image forming apparatus 1 of FIG. 1, when the front side of the apparatus is the right side (A side), the paper feed cassette 5 is also attached to the right side. In general, the exterior surface 13 of the paper feed cassette 5 is preferably the same surface as the front exterior surface 14 of the image forming apparatus 1. At this time, a surplus space 15 is generated in the paper feed cassette 5.

FIG. 2 is a perspective view showing the paper feed cassette. According to this paper feed cassette 5, in order to use the surplus space 15 shown in FIG. 1 other than the paper stacking section, the surplus space 15 is formed with a recess 16 so that articles (replacement parts) can be accommodated. . For example, a spare paper feed roller 7 ′ can be stored in the recess 16.
As described above, in the image forming apparatus 1 that uses the paper feed cassette 5 that stores the user-detachable paper, replacement parts are arranged in advance in the surplus space 15 of the paper feed cassette 5 of the image forming apparatus 1. Even if the replacement part has reached the end of its life, it can be immediately and quickly replaced.
In addition, waste toner can be accommodated in the surplus space 15 to reduce the size of the image forming apparatus. In order to configure in this way, a shutter configuration of the waste toner delivery unit, a detection mechanism for detecting the fullness of the waste toner, and the like are necessary. However, since these are widely known, description thereof will be omitted.

Further, in an image forming apparatus having a plurality of sheet cassettes having the same shape, when the first sheet cassette becomes empty, the use of the image forming apparatus can be continued by setting another sheet cassette. .
Further, when dealing with the replacement of the paper feed cassette when the waste toner is full, in a paper feed cassette storing replacement parts such as a paper feed roller and a friction pad, these replacement parts can be exchanged at the same time.

There is a possibility that the replacement part may deteriorate over time if the replacement part is simply arranged in the paper feed cassette 5, and that the replacement part is visible when paper is supplied to the paper feed cassette 5. The appearance is not good.
By storing waste toner in the surplus space 15 (FIG. 1) in the paper feed cassette 5 of the image forming apparatus 1 (FIG. 1), the image forming apparatus can be downsized. Further, when the waste toner is full, it is possible to easily cope with the problem by exchanging the paper feed cassette, or by replacing the paper feed cassette with another paper feed cassette in an image forming apparatus having a plurality of paper feed cassettes. In a paper feed cassette that stores replacement parts such as a paper feed roller and a friction pad, these replacement parts can be exchanged at the same time.

FIG. 3 is a schematic perspective view showing the first embodiment of the lid of the recess provided in the surplus space. FIG. 4 is a schematic perspective view showing a second embodiment of the lid of the recess provided in the surplus space.
With reference to FIGS. 1 to 3, a lid 17 is provided in the recess 16 provided in the surplus space 15 of the paper feed cassette 5. As shown in FIG. 3, the lid 17 has a structure that rotates around a fulcrum 17a. The lid 17 may also be configured to open and close by sliding as shown in FIG.
As described above, the paper feed cassette 5 that stores the user-detachable paper 6 of the image forming apparatus 1 has a storage space with the lid 17 in the surplus space 15 other than the paper stacking portion. As a result, the lid 17 of the exterior portion of the paper feed cassette 5 prevents the deterioration of replacement parts that remove dust, such as a rubber material such as a paper feed roller and a filter housed in the exterior portion, and improves the appearance quality. be able to.

FIG. 5 is a schematic perspective view showing a first embodiment of a paper feed cassette divided into a paper stacking portion and an exterior portion according to the present invention. In FIG. 5, the paper feed cassette 5 is divided into a paper stacking portion 18 and an exterior portion 19, which are fastened by a set screw 20 that can be removed by a user with a coin or the like. The user can replace the exterior part 19 with a new exterior part 19 by removing the set screw 20.
The paper feed cassette 5 can be easily replaced by the user by removing the exterior portion 19, and even if any trouble occurs in the exterior portion, avoid replacing the entire paper feed cassette and replacing only the exterior portion 19. It can respond. Further, even if the image forming apparatus itself using this paper feed cassette 5 is replaced, if the configuration of the paper stacking unit 18 is the same, only the exterior unit 19 can be replaced and the paper stacking unit 18 can be reused.
For example, a storage portion is provided in the exterior portion 19 of the paper feed cassette 5 shown in FIG. 5, thereby omitting the above-described recess 16 (FIG. 2) and lid 17 (FIGS. 3 and 4), and cost. At the same time, the appearance quality can be improved.

FIG. 6 is a schematic perspective view showing an exterior portion of a paper feed cassette in which a friction pad is set. In FIG. 6, a friction pad 21 is disposed on the exterior portion 19 of the paper feed cassette 5 of FIG. 5. The exterior portion 19 that can be attached to and detached from the paper feed cassette 5 is divided from the paper feed cassette 5 at a position where the friction pad 21 is set. Therefore, when the user removes the exterior portion 19, the entire friction pad 21 is exposed, and the friction pad 21 can be easily replaced.
As described above, in the image forming apparatus that feeds the stored paper one by one by the paper feeding roller and the friction pad, the friction pad 21 is provided on the exterior portion 19 of the paper feeding cassette 5 in the paper feeding cassette that can be attached and detached by the user. Is arranged. As a result, the friction pad can be easily replaced by providing the exterior pad 19 with the friction pad removed from the paper feed cassette 5.

FIG. 7 is a schematic view showing a second embodiment of an image forming apparatus to which the present invention is applied. FIG. 7 shows a state in which the sheet feeding unit 5 is removed and the one-sheet manual feeding unit 22 is installed instead. Although not shown, the single-sheet feeding unit 22 is fastened to the paper stacking unit 18 by a set screw 20 as in the case of the exterior unit 19 of FIG.
The leading edge of the paper set in the single sheet feeding unit 22 hits the registration roller 8 and is fed by the rotation of the registration roller 8. Further, if the manual feed unit 22 is costly, a configuration in which a paper feed roller for the manual feed unit is provided and a plurality of papers can be set, and when the manual feed unit is not used, it is stored and becomes the same surface as the exterior surface 14. Although configurations are conceivable, these configurations are already known, and thus description thereof is omitted.
In this way, an image forming apparatus provided with a paper feed cassette which is supplied to a user who requires a manual feed function as an option, and which is less expensive and easy to use for a user who does not need the manual feed function. Can provide.

FIG. 8 is a schematic view showing a third embodiment of an image forming apparatus to which the present invention is applied. In FIG. 8, a transport unit 23 is installed instead of the manual feed unit of FIG. As a result, one sheet feeding port can be added to the image forming apparatus 1.
For example, a user who wants to set a large amount of paper can realize this paper feeding port by additionally setting a large amount of paper feeding tray 5 ′. When a large amount of paper feed trays 5 ′ are set, it is more convenient to attach and detach the paper feed cassette 5 when the front side of the image forming apparatus 1 is the left side (B side).
In this way, by removing the exterior portion of the paper feed cassette and adding a transport path, and providing the image forming apparatus 1 with the external tray (mass feed tray) 5 ′, it is possible for a user who wants to set a larger amount of paper. Can respond.

FIG. 9 is a schematic view showing a fourth embodiment of an image forming apparatus to which the present invention is applied. In the fourth embodiment shown in FIG. 9, an image forming apparatus 24 capable of forming an image on both sides of a paper is shown. A branch claw 25 and a reverse roller 26 are newly provided above the fixing device 10.
When an image is formed on only one side of the paper, the branching claw 25 is at the position of the broken line, and the paper is discharged onto the paper discharge tray 12 by the paper discharge roller 11 as described above in the first embodiment.
When forming images on both sides of the paper, the branching claw 25 is in the position of the solid line, and the paper that has passed through the fixing device 10 on which the one-sided image has been formed is guided by the branching claw 25 and a conveyance guide plate (not shown) to the reversing roller 26. Be transported.
The reversing roller 26 rotates in the direction of the solid line, but when the rear end of the paper approaches, the direction of rotation is changed to the direction of the broken line, and the paper is conveyed to the plurality of duplex conveying rollers 27 and returns to the registration roller 8. The paper provided with the image on the opposite surface is discharged to the paper discharge tray 12 by the branch claw 25 moved to the broken line position.

FIG. 10 is a schematic view showing a fifth embodiment of an image forming apparatus to which the present invention is applied. In the fifth embodiment shown in FIG. 10, a lower discharge tray 28 is installed in place of the manual feed unit and the transport unit described in the embodiments of FIGS.
At this time, a paper discharge branch claw 29 is provided in the double-sided conveyance path of the image forming apparatus 24. The paper discharge branch claw 29 is in the position of a broken line when paper is discharged to the lower paper discharge tray 28. In order to discharge the paper to the lower paper discharge tray 28, the branching claw 25 needs to be always at the solid line position regardless of the image formation on one side / both sides.
The present invention is effective when the image forming apparatus 24 is installed at a high position and it is difficult to take out the paper discharged onto the paper discharge tray 12. Since the outer portion of the cassette can be used as a paper discharge tray, the paper discharge property when the image forming apparatus is installed at a high position is improved.

FIG. 11 is a schematic view showing a sixth embodiment of an image forming apparatus to which the present invention is applied. In the sixth embodiment shown in FIG. 11, a switchback roller 30 and a switching claw 31 are further arranged on the lower discharge tray 28 in FIG. The switchback roller 30 and the switching claw 31 perform the same operation as the above-described reversing roller and the branch claw 25.
As a result, the lower paper discharge tray 28 can be used as a paper discharge tray, and at the same time, can be used as a reversing path for image formation on both sides. That is, since the aforementioned branching claw 25 and the reverse roller 26 are not necessary, the height of the image forming apparatus 24 can be reduced.
In this way, the height of the image forming apparatus 24 can be lowered by inverting the paper on which the single-sided image has been formed on the lower paper discharge tray 28. In addition, by supplying it as an option to a user who needs image formation on both sides, a cheaper image forming apparatus can be provided to a user who does not need it.

FIG. 12 is a schematic perspective view showing a second embodiment of a paper feed cassette divided into a paper stacking portion and an exterior portion according to the present invention. In the first embodiment of FIG. 5 described above, the paper feed cassette 5 is divided into a paper stacking section 18 and an exterior section 19 and fastened by a set screw 20 that can be removed by a user with a coin or the like. It was. The user was able to replace the exterior part 19 with a new exterior part 19 by removing the set screw 20.
In the second embodiment shown in FIG. 12, the paper stacking portion 18 and the exterior portion 19 are fastened by fitting using the elasticity of the molded part. The fitting wall 32 of the paper stacking unit 18 has a thickness and a length that can be elastically deformed, and includes a fitting hole 33.
Further, the front end portion of the fitting wall 32 has an appropriate rake angle so that it can easily enter the exterior portion 19 of the sheet feeding cassette 5 when fitted, and can be easily hooked when removing the fitting. It has a shape portion 34 to have. The exterior portion 19 is provided with a protrusion 35 at a position where it is fitted into the fitting hole 33.
In this way, by utilizing the elasticity of the molded part that can be easily removed by the user to connect the exterior portion 19 of the paper feed cassette and the paper stacking portion 18, it is possible to reduce the cost with an inexpensive means. it can.

FIG. 13 is a schematic cross-sectional view showing a fitting portion of a first modification of the second embodiment of the paper feed cassette divided into a paper stacking portion and an exterior portion according to the present invention. FIG. 14 is a schematic perspective view showing a fitting portion of the first modified example of FIG.
Referring to FIGS. 13 and 14, a slide fitting portion between the paper stacking portion 18 and the exterior portion 19 of the paper feed cassette 5 of the present invention is shown. The fitting of the present invention is performed by sliding from the lateral direction as shown in FIG. Since the attachment / detachment direction of the paper feed cassette 5 and the slide direction are orthogonal to each other, it can be said that the fitting is less likely to come off than the fitting in FIG.
As described above, the slide fitting that can be easily removed by the user is used to connect the exterior portion 19 of the paper feed cassette 5 and the paper stacking portion 18 according to the present invention. Cost reduction can be achieved by using an inexpensive means to connect the exterior portion 19 of the paper feed cassette 5 to the paper stacking portion 18.

FIG. 15 is a schematic perspective view showing a fitting portion of a second modification of the second embodiment of the cassette divided into a paper stacking portion and an exterior portion according to the present invention. FIG. 16 is a schematic front sectional view showing a fitting portion of the second modified example of FIG.
Referring to FIGS. 15 and 16, a lever 36 is disposed on the exterior portion 19 in order to fit the exterior portion 19 to the paper stacking portion 18 of the paper feed cassette 5 of the present invention. This lever is composed of two levers 36 set on the exterior portion 19 so as to move in the direction of the arrow (C) and be guided by a guide.

The lever 36 is provided with a projection 37 for fitting. These protrusions 37 are fitted into holes 39 provided in the paper stacking unit 18. Further, a biasing spring 38 is set between the two levers 36 in a compressed state so as to always bias the two levers 36 outward.
When releasing the fitting, the two projections 36 are moved in the direction of the arrow (D) (by picking the projection 36a of the lever 36 with a finger), so that the projection 37 for fitting is fitted to the paper stacking portion 18. The hole 39 is removed and the fitting is released.
In this way, by providing the lever 36 for removing the exterior portion 19 from the paper feed cassette 5, the user is requested to have a force for removing the fitting, and at the same time, there is no problem that the fitting portion is damaged if the force is excessively applied. In addition, the user can easily remove the exterior portion 19 easily and safely, and the fitting portion is less likely to be damaged.

FIG. 17 is a schematic perspective view showing a fitting portion of a third modification of the second embodiment of the paper feed cassette divided into a paper stacking portion and an exterior portion according to the present invention. FIG. 18 is a schematic perspective view showing another state of the fitting portion of the third modified example of FIG.
In the third modification of the paper feed cassette according to the second embodiment, a part of the fitting in the second embodiment and the second modification is left as a fulcrum, and the exterior portion 19 of the paper feed cassette 5 is used. Is configured to open and close so that the storage portion 45 is exposed.
Referring to FIGS. 17 and 18, in order to fit the exterior portion 19 to the paper stacking portion 18 of the paper feed cassette 5 of the present invention, two levers set on the exterior portion 19 (the levers in the figure are shown). (Only the protrusion 40a is shown) is provided with a protrusion 41 for fitting.

The exterior portion 19 is also provided with a projection 42 for fitting. The paper stacking unit 18 is provided with a hole 43 that fits into the projection 41 for fitting the lever and a hole 44 that fits into the projection 42 for fitting the exterior portion 19. The fitting between the fitting protrusion 42 and the hole 44 of the exterior portion 19 utilizes the elasticity of the mold part described above.
At this time, if the protrusion 40a of the lever is operated to disengage the fitting protrusion 41 and the hole 43, the exterior portion 19 rotates with the fitting protrusion 42 and the hole 44 not detached. As a result, the storage portion 45 storing the replacement part is exposed (FIG. 18).
According to the third modification, when the replacement part is stored in the exterior part 19, the exterior part 19 does not need to be completely divided from the paper stacking part 18. By leaving the fitting of the exterior part 19 as a fulcrum, the exterior part 19 can be rotated and the exterior part 19 as a storage part can be opened and closed, thereby improving operability.

1 is a schematic diagram showing a first embodiment of an image forming apparatus to which the present invention is applied. It is a perspective view which shows a paper feed cassette. It is a schematic perspective view which shows 1st Embodiment of the cover of the recessed part provided in the surplus space. It is a schematic perspective view which shows 2nd Embodiment of the cover of the recessed part provided in the surplus space. It is a schematic perspective view which shows 1st Embodiment of the paper feed cassette divided | segmented into the paper stacking part and exterior part by this invention. It is a schematic perspective view which shows the exterior part of the paper feed cassette in which the friction pad is set. It is the schematic which shows 2nd Embodiment of the image forming apparatus to which this invention is applied. It is the schematic which shows 3rd Embodiment of the image forming apparatus to which this invention is applied. It is the schematic which shows 4th Embodiment of the image forming apparatus to which this invention is applied. It is the schematic which shows 5th Embodiment of the image forming apparatus to which this invention is applied. It is the schematic which shows 6th Embodiment of the image forming apparatus to which this invention is applied. It is a schematic perspective view which shows 2nd Embodiment of the paper feed cassette divided | segmented into the paper stacking part and exterior part by this invention. It is a schematic sectional drawing which shows the fitting part of the 1st modification of 2nd Embodiment of the paper feed cassette divided | segmented into the paper stacking part and exterior part by this invention. It is a schematic perspective view which shows the fitting part of the 1st modification of FIG. It is a schematic perspective view which shows the fitting part of the 2nd modification of 2nd Embodiment of the cassette divided | segmented into the paper stacking part and exterior part by this invention. It is a schematic front sectional drawing which shows the fitting part of the 2nd modification of FIG. It is a schematic perspective view which shows the fitting part of the 3rd modification of 2nd Embodiment of the paper feed cassette divided | segmented into the paper stacking part and exterior part by this invention. It is a schematic perspective view which shows the other state of the fitting part of the 3rd modification of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Image forming apparatus, 2 writing unit, 5 paper feed cassette, 5 'external tray (mass feed tray), 6 paper, 7 paper feed roller, 8 registration roller, 10 fixing device, 12 paper discharge tray, 15 surplus space , 16 Concave part, 17 Lid, 18 Paper stacking part, 19 Exterior part, 20 Set screw, 21 Friction pad, 22 Manual feed tray (single sheet feeding unit), 23 Conveying device (conveying unit), 24 Image forming device, 25 Branching claw , 26 Reverse roller, 27 Double-sided transport roller, 28 Paper discharge tray (lower paper discharge tray), 29 Paper discharge branch claw, 30 Switchback roller, 31 Switching claw, 32 Paper stacking section 18 fitting wall, 33 Fitting hole , 35 projection, 36 lever, 36a projection of lever 36, 37 projection for fitting of lever 36, 39 paper Hole provided in stacking portion 18, 40a lever projection, 41 lever fitting projection, 42 exterior portion 19 fitting projection, 43 fitting hole, 44 fitting hole, 45 storage portion

Claims (6)

A paper feed cassette mounted on an image forming apparatus, wherein the paper feed cassette includes a cassette body on which sheets are stacked, and an exterior surface that appears outside the image forming apparatus when mounted on the image forming apparatus. includes an exterior portion, and a detaching mechanism for coupling said cassette body and the outer portion, the detachable mechanism may rotate the outer portion of the first projecting member is fitted into the first hole portion as a fulcrum The second projecting member provided so as to be held and movable manually is engaged with the second hole so as to lock the rotation. Paper cassette. The paper feed cassette according to claim 1, wherein the exterior part includes a storage part, and the storage part is exposed to the outside by the rotation . The attachment / detachment mechanism includes a projecting and holding part that protrudes from opposite side surfaces of the cassette body and includes the first and second hole parts, and the first and second projecting members provided in the exterior part. paper feed cassette according to claim 1 or 2, characterized in that it comprises a mounting member. It said second projecting member, the paper feed cassette according to any one of claims 1 to 3, characterized in that it is biased in a direction for engaging the second hole portion by the elastic member. Paper feed cassette according to any one of claims 1 to 4 the friction pad for feeding sheets one by one by friction, characterized in that arranged in the outer portion place. An image forming apparatus comprising the paper feed cassette according to claim 1 .

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