JP3296598B2 - Paper feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding device such as a copying machine and a printer, and more particularly to a paper feeding device having a paper feeding tray which can be pulled out in a direction perpendicular to a paper feeding and conveying direction.

[0002]

2. Description of the Related Art At present, in order to save the space of a copying machine, a type in which a paper feed tray is provided on a side portion of a main body and a type in which a paper tray is provided in a lower portion of the main body (hereinafter referred to as a front loading type).
Has become mainstream.

However, with the front loading method, the paper feed tray is pulled out in a direction perpendicular to the paper transport direction, so that the paper breaks during the processing of the jammed paper around the paper feed tray, and the broken pieces cannot be removed. Cause trouble.

FIG. 8 is a block diagram of a copying machine having a front-loading type sheet feeding device.

[0005] Only the paper feeding unit will be described.
Is a paper feed tray, 11 is a half-moon-shaped paper feed roller, 12 is an openable and closable guide plate (12a is set, 12b is open) constituting a vertical transport path, 13 is a transport roller, 14 is a paper feeder Paper 15 stored in the tray 1 is jam paper.

FIG. 9 is a view showing a state in which the paper feed tray is reset when jam paper is present. The paper feed tray is pulled out in a state where the jam paper added to the transport roller 13 is present. When the sheet is reset, the jammed paper is caught on the inner side wall 2 of the sheet feeding tray 1, and as described above, the sheet may be torn and a piece of paper may remain inside the apparatus. In addition, 16 is a front side plate and 17 is a rear side plate.

As a countermeasure against this trouble, the transport roller 13
If there is paper on the paper, the paper 15
However, if the user pulls out the paper feed tray 1 before taking out the jammed paper 15,
The same trouble occurs.

[0008] The following mechanisms are known as mechanisms for preventing troubles such as paper tear due to user error. (1)
A mechanism that locks the paper feed tray 1 so that the paper feed tray 1 cannot be pulled out when a jam occurs between the transport roller 13 and the paper feed tray 1 until the paper is removed. (2) A mechanism for releasing the nip of the separation unit or the like so that the paper does not fall out of the paper feed tray 1 even if the paper feed tray 1 is pulled out, and the paper is not torn.

[0009]

In the mechanism (1), a sensor for checking the removal of the jammed paper and a mechanism for locking the paper feed tray are required, which increases costs. Further, when the power supply and the like are turned off, the paper feed tray can be pulled out, which is not perfect.

In the mechanism (2), when the paper feed tray is set in the main body again in the state as it is, the inner side wall of the paper feed tray is caught by the paper, and the paper is torn.
There is a problem in that a large number of folds occur in the sheet even if the sheet is left behind or the sheet is not torn, which makes it difficult to remove the sheet from the transport roller side.

According to the present invention, even if the paper feed tray is pulled out while jam paper is present in the paper feed unit, and the paper is reset again from outside the machine, it is possible to prevent a large number of broken or damaged papers from deteriorating the jam removability. It is an object of the present invention to provide a paper feeding device capable of performing the above-mentioned operations.

[0012]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sheet feeding apparatus having a sheet feeding tray which can be pulled out in a direction perpendicular to the sheet feeding and conveying direction. This is achieved by a first means provided with:

Further, the above object is achieved by the first means, wherein the inclined wall is formed integrally with the rear wall.

[0014] Further, the above object is achieved by the first means in the first means, wherein the inclined wall is constituted by an elastic thin plate such as a mylar attached to the rear side wall.

The above object is also achieved by the first means, wherein the inclined wall is hingedly connected to the rear side wall, and the inclined wall is constituted by a plate which is urged to expand downward by a spring. Achieved.

[0016]

According to the first means, even if a user mistakes the jam processing method and pulls out or resets the paper feed tray when a jam occurs between the transport roller and the paper feed tray, the jammed paper is not fed to the paper feed tray. The paper is scooped up by the inclined wall on the outer surface of the rear side wall, so that the paper is prevented from being crushed (a large number of folded) and damaged.

In the second means, the processing and manufacturing costs are reduced by forming the inclined wall integrally with the rear wall.

In the third means, the inclined wall is made of an elastic thin plate, and can be folded down, so that the depth dimension of the sheet feeding tray can be shortened and space can be saved.

In the fourth means, the spring for inclining and urging the plate constituting the inclined wall plays a role of buffering the paper set in the paper feed tray. And the occurrence of lateral resist failure is prevented beforehand.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. The same portions as those in the conventional example are denoted by the same reference numerals, and duplicate description will be omitted.

FIG. 1 is a diagram showing a state of the sheet feeding device according to the first embodiment in the middle of setting a sheet feeding tray, and FIG. 2 is a diagram showing a state of the sheet feeding device when the setting is completed.

In this embodiment, the outer surface (back surface) of the back side wall 2
The inclined wall 3 is integrally formed by forming an inclined surface extending downward.

Therefore, even if the jammed paper 15 is present as shown in FIG.
5 is picked up by the inclined wall 3 without being hooked.

FIG. 3 is a main part configuration diagram showing a state of a sheet feeding tray in the sheet feeding apparatus according to the second embodiment, and FIG.
FIG. 3 is an overall configuration diagram when a set is completed.

In this embodiment, a mylar 4 is attached to the upper edge of the rear side wall 2 while being inclined downward, and the mylar 4 forms the inclined wall 3. The mylar 4 can scoop up the jammed paper in the same manner as described above. In addition, when the mylar 4 hits the rear side plate 17, the mylar 4 is folded toward the inner side wall 2 as shown in FIG. 4. , It is possible to reduce the size of the body on the back side.

FIG. 5 is a configuration diagram showing a state in which the paper feeding tray according to the third embodiment is being set in the paper feeding tray, and FIG. 6 is a configuration diagram when the setting is completed.

In this embodiment, the upper end of the plate 5 is hinged to the hinge 5a at the upper edge of the rear side wall 2, and the spring 6 is elastically contacted between the plate 5 and the rear side wall 2. The plate 5 is inclined so as to spread downward, thereby forming the inclined wall 3.

In this embodiment, the action on the jammed paper 15 is the same as that of the first and second embodiments.
7 can be alleviated, and the displacement of the paper 14 in the paper feed tray 1 can be prevented.

FIG. 7 is a structural view of a main part of a sheet feeding apparatus according to a fourth embodiment.

This embodiment is a modification of the third embodiment. After forming a conductor, a side thin fin 8 and a conductive thin plate 7 which is in contact with both of the plates 5 also formed of a conductor are provided. When the paper feed tray 1 is set in the main body, the plate body 5 is configured to contact the rear side plate 17 that is grounded.

Then, the paper 14 set in the paper feed tray 1 can be grounded, and the accumulation of static electricity generated when the paper 14 is separated can be prevented, and the sticking of the paper 14 due to the static electricity can be eliminated. And the separation performance is improved.

[0032]

According to the first aspect of the present invention, even if the user mistakenly performs the jam processing method when the jam occurs between the transport roller and the paper feed tray, the user may pull out the paper feed tray or reset the jam. Since the paper is picked up by the inclined wall on the outer surface of the rear side wall of the paper feed tray, it is possible to prevent the paper from being crushed (a large number of folded) and damaged.

According to the second aspect of the present invention, since the inclined wall is formed integrally with the rear wall, processing and manufacturing costs can be reduced.

According to the third aspect of the present invention, since the inclined wall is formed of an elastic thin plate and is foldable, the depth dimension of the sheet feeding tray can be shortened, and the space can be saved.

According to the fourth aspect of the present invention, the spring for inclining and urging the plate constituting the inclined wall plays a role of buffering the sheet set in the sheet feed tray, thereby preventing the sheet in the sheet feed tray from shifting. In addition, it is possible to prevent the occurrence of a skew, a lateral resist defect, and the like.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a state in which a sheet feeding tray is being set in a sheet feeding apparatus according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram illustrating a state of the sheet feeding device according to the first exemplary embodiment of the present invention when the sheet tray setting is completed.

FIG. 3 is a main part configuration diagram illustrating a state in which a sheet feeding tray is being set in a sheet feeding apparatus according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram illustrating a state in which a sheet feeding tray of a sheet feeding apparatus according to a second embodiment of the present invention has been set.

FIG. 5 is a configuration diagram illustrating a state in which a sheet feeding tray is being set in a sheet feeding apparatus according to a third embodiment of the present invention.

FIG. 6 is a configuration diagram illustrating a state when a sheet feeding tray has been set in a sheet feeding apparatus according to a third embodiment of the present invention.

FIG. 7 is a configuration diagram of a main part of a sheet feeding device according to a fourth embodiment of the present invention.

FIG. 8 is a configuration diagram of a copying machine having a front-loading type sheet feeding device.

FIG. 9 is a configuration diagram of a conventional example showing a state in which a paper feed tray is reset in a state where jam paper is present.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 paper feed tray 2 inner side wall 3 inclined wall 4 mylar forming inclined wall 3 5 plate forming inclined wall 3 6 spring

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 3/46 B65H 1/26 G03G 15/00 526

Claims (4)

(57) [Claims] 1. A sheet feeding device having a sheet feeding tray that can be pulled out in a direction perpendicular to a sheet feeding and conveying direction, wherein an inclined wall extending downward is provided on an outer surface of a rear side wall of the sheet feeding tray. Paper feeder. 2. The sheet feeding device according to claim 1, wherein the inclined wall is formed integrally with the rear side wall. 3. The device according to claim 1, wherein the inclined wall is
A sheet feeding device comprising an elastic thin plate such as a mylar attached to the rear side wall. 4. The device according to claim 1, wherein the inclined wall is
A sheet feeding device, comprising a plate body hinged to the rear side wall and urged so as to expand downward by a spring.