JPH107260A - Paper cassette - Google Patents

Abstract

(57) [Summary] The present invention provides a sheet cassette in which sheets of different sizes can be easily set by interlocking an end fence and a side fence. When a sheet is set, a side fence is provided.
b is moved in the width direction of the sheet according to the size of the set sheet. When the side fences 4a and 4b move, the two-stage gear 8 is rotated by the racks 5a and 5b, and the rotation of the two-stage gear 8 is transmitted to the gear pulley 10 via the gear 9 and engaged with the gear pulley 10 and the pulley 12. The rotating wire 11 moves. With the movement of the wire 11, the end fence 14 moves in the length direction of the main body case 2 in conjunction with the movement of the side fences 4a, 4b. When the end fence 14 moves, the projection 19a of the leaf spring 19 attached to the end fence 14 enters the positioning groove 18 of the slide groove 17 according to the sheet size, and the end fence 14 is positioned at a position appropriate for the sheet position. The positioning and fixing are performed, and the side fences 4a and 4b are positioned and fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper cassette, and more particularly, to a paper cassette capable of easily setting a plurality of sheets by a simple operation.

[0002]

2. Description of the Related Art In a facsimile apparatus, a copying machine, a printer, and the like, a plurality of sheets (recording sheets) are stored in a sheet cassette, and sheets are fed one by one from a sheet cassette by a sheet feed roller to record. Output.

In this paper feed cassette, particularly in a paper feed cassette in which paper to be stored is separated and fed one by one, when a paper feed direction end is set to a paper front end in a main body case,
An end fence that holds the trailing end of the sheet and a pair of side fences that hold both ends in the width direction of the sheet are provided.
The paper is held in the proper position in the paper cassette.

In such a conventional paper cassette, generally, the end fence and the side fence can be set so as to be movable with respect to the main body case. By adjusting the position of the end fence and the side fence, the position of the end fence and the side fence can be set.

[0005] Conventionally, the end fence and the pair of side fences are individually moved in accordance with the paper size by fitting them into set grooves formed in the main body case for each paper size. Therefore, every time paper of different size is set, it is necessary to remove the end fence and side fence from the set groove and insert it into the set groove according to the paper size. There was a problem that sex was troublesome.

Therefore, conventionally, end fences and side fences are provided slidably in slide grooves,
The position can be fixed by the position fixing member, and when setting paper of different sizes, the position fixing of the end fence and side fence by the position fixing member is released, and the end fence and side fence are respectively adjusted according to the paper to be set. Some devices have been individually adjusted in position and fixed by a position fixing member.

[0007]

However, in such a conventional paper feed cassette, the end fence and the side fence are individually adjusted in position. However, it is necessary to move the end fence and the side fence individually to fix the position, and there is a problem that the operation of adjusting the position of the end fence and the side fence when setting sheets of different sizes is troublesome.

Therefore, according to the present invention, the side fence is guided by the side guide means so as to be movable in the width direction of the sheet, and the end fence is guided by the end guide means so as to be movable in the length direction of the sheet. When one of the side fence and the end fence is adjusted to move according to the paper, the other is moved in conjunction with the movement of the one by the connecting means, so that one of the side fence and the end fence is adjusted to the paper size. An object of the present invention is to provide a sheet cassette in which the position of the other side can be automatically adjusted only by moving the sheet, and the position adjusting operation of the end fence and the side fence when setting sheets of different sizes is easy and easy.

According to a second aspect of the present invention, the connecting means includes a rack member fixed to the side fence and extending in the width direction of the sheet, a gear meshing with the rack member and rotating, and a gear meshing with the gear. A mechanism, a gear pulley disposed on the leading end side of the sheet in the moving direction of the end fence, meshing with the gear mechanism, and rotating in conjunction with the gear mechanism, and a rear end side of the sheet in the moving direction of the end fence. With a simple structure, the side pulley, the wire stretched between the gear pulley and the pulley, the wire connected to the end fence, and a spring for giving the wire a predetermined elasticity are provided. By simply moving one of the fence and end fence, the position of the other can be adjusted automatically, and the end fence and side fence can be adjusted when loading paper of different sizes. And its object is to provide a simple and easy paper feed cassette.

According to a third aspect of the present invention, the side guide means includes a guide groove formed along the moving direction of the side fence, and a guide pin formed in the side fence and having a tip inserted into the guide groove. With a simple configuration, the side fence can be appropriately moved in the width direction of the paper, and the position adjustment work of the end fence and the side fence when setting paper of different sizes is simple and easy. It is intended to provide cassettes.

According to a fourth aspect of the present invention, the end guide means includes a guide groove formed along the moving direction of the end fence, and a guide pin formed in the end fence and having a tip inserted into the guide groove. With this configuration, the end fence can be moved appropriately in the direction of the front and rear edges of the paper with a simple configuration, making it easy and easy to adjust the position of the end fence and side fence when setting paper of different sizes. It is intended to provide a paper feed cassette.

According to a fifth aspect of the present invention, the end guide means is adapted to a slide groove formed along the moving direction of the end fence and to various sizes of paper formed on the side wall of the slide groove and on which the end fence is set. A positioning groove for positioning the end fence at the set position, and a positioning member formed on the end fence and pressed into the positioning groove by a predetermined elastic force against the side wall of the slide groove on which the positioning groove is formed. By doing
It is an object of the present invention to provide a sheet cassette which can move the end fence more stably and can appropriately position the end fence.

According to a sixth aspect of the present invention, a sheet size sensor detects the width and length of a set sheet, respectively, so that the size of the set sheet can be easily known. It is an object of the present invention to provide a paper cassette having good characteristics.

[0014]

According to a first aspect of the present invention, there is provided a sheet cassette in which a plurality of sheets are stored in a main body case, and both ends in the width direction of the sheets are held by side fences. A paper feed cassette in which the lengthwise rear end of the paper is held by an end fence and the paper to be stored is sent out toward the front end of the paper, wherein the side fence is arranged in the width direction of the paper in the main body case. The end fence is guided by the end guide means so as to be movable in the length direction of the sheet in the main body case, and the side fence and the end fence are connected by a predetermined connection. When one of the side fence and the end fence is moved and adjusted according to the paper, the other is connected to the connecting means. Ri by moving in conjunction with movement of the hand, have achieved the above objects.

According to the above construction, the side fence is guided by the side guide means so as to be movable in the width direction of the sheet, and the end fence is guided by the end guide means so as to be movable in the length direction of the sheet. When one of the fences is moved and adjusted according to the paper, the other is moved in conjunction with the movement of the one by the connecting means, so only one of the side fence and the end fence is moved according to the paper size, The other position can be automatically adjusted, and the operation of adjusting the positions of the end fence and the side fence when setting sheets of different sizes can be made simple and easy.

In this case, for example, as set forth in claim 2, the connecting means is fixed to the side fence and extends in the width direction of the sheet, and meshes with the rack member to rotate. A gear mechanism that meshes with the gear, a gear pulley that is arranged on the front end side of the sheet in the moving direction of the end fence, meshes with the gear mechanism, and rotates in conjunction with the gear mechanism, A pulley disposed on the rear end side of the sheet in the moving direction of the end fence, a wire stretched between the gear pulley and the pulley, connected to the end fence, and a wire connected to the wire; And a spring having a predetermined elasticity.

According to the above construction, the connecting means includes the rack member fixed to the side fence and extending in the width direction of the paper, the gear meshing with the rack member and rotating, and the gear mechanism meshing with the gear. A gear pulley which is disposed on the leading end side of the sheet in the moving direction of the end fence, meshes with the gear mechanism and rotates in conjunction with the gear mechanism, and is disposed on the rear end side of the sheet in the moving direction of the end fence. Since it is provided with a pulley, a wire stretched between the gear pulley and the pulley and connected to the end fence, and a spring for giving the wire a predetermined elasticity, with a simple configuration,
By simply moving one of the side fence and end fence, the position of the other can be adjusted automatically, making it easier and easier to adjust the position of the end fence and side fence when setting different size paper. It can be.

For example, as set forth in claim 3, the side guide means includes a guide groove formed along a moving direction of the side fence, and a tip formed in the guide groove formed in the side fence. And a guide pin into which the portion is inserted.

According to the above arrangement, the side guide means is
Since it has a guide groove formed along the moving direction of the side fence, and a guide pin formed in the side fence and having a leading end inserted into the guide groove,
With a simple configuration, the side fence can be appropriately moved in the width direction of the paper, and the position adjustment work of the end fence and the side fence when setting paper of different sizes can be made simple and easy. .

Further, for example, as described in claim 4, the end guide means includes a guide groove formed along a moving direction of the end fence, and a tip formed in the guide groove formed in the end fence. And a guide pin into which the portion is inserted.

According to the above construction, the end guide means is
Since it has a guide groove formed along the moving direction of the end fence and a guide pin formed at the end fence and inserted at the tip of the guide groove,
With a simple configuration, the end fence can be moved appropriately toward the front and rear edges of the paper, making it easy and easy to adjust the position of the end fence and side fence when setting paper of different sizes. it can.

Further, for example, as set forth in claim 5, the end guide means includes a slide groove formed along a moving direction of the end fence, and a slide groove formed on a side wall of the slide groove. A positioning groove for positioning the end fence at a position corresponding to various sizes of sheets to be set; and a pressing groove formed on the end fence and pressed against a side wall on which the positioning groove of the slide groove is formed with a predetermined elastic force. A positioning member that enters the positioning groove may be provided.

According to the above construction, the end guide means is
A slide groove formed along the movement direction of the end fence, a positioning groove formed on a side wall of the slide groove and positioning the end fence at a position corresponding to various sizes of paper on which the end fence is set, and a formation groove on the end fence And a positioning member that is pressed against the side wall of the slide groove where the positioning groove is formed with a predetermined elastic force and penetrates into the positioning groove, so that the end fence can be moved more stably. In addition, the end fence can be properly positioned.

Further, for example, the paper feed cassette may further include a paper size sensor for detecting a width and a length of the set paper.

According to the above configuration, since the width and length of the set paper are detected by the paper size sensor, the size of the set paper can be easily known, and the availability of the paper cassette can be improved. Can be improved.

[0026]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. It should be noted that the embodiments described below are preferred embodiments of the present invention, and therefore, various technically preferable limitations are added. However, the scope of the present invention is not limited to the following description. The embodiments are not limited to these embodiments unless otherwise specified.

FIGS. 1 to 5 are views showing a paper feed cassette to which an embodiment of the paper feed cassette of the present invention is applied.

In FIG. 1, a paper feed cassette 1 has a main body case 2 formed in a box shape with an upper opening, and the main body case 2 is used for feeding paper of an image forming apparatus such as a facsimile machine, a copying machine, and a printer. It is detachably set on the base 3 (see FIG. 2).

A pair of side fences 4a and 4b are disposed on the front side (the upper left side in FIG. 1) of the main body case 2 which is the paper sending side, facing the width direction of the main body case 2. The side fences 4a and 4b are formed in a substantially L-shape. Racks (rack members) 5a, 5b extending in the width direction of the main body case 2 are attached to the side fences 4a, 4b, and the bottom plate 2a of the main body case 2, as shown in FIG. Guide grooves 6a, 6b extending in the width direction of the case 2, that is, the moving direction of each side fence 4a, 4b, are formed for each side fence 4a, 4b. The guide grooves 6a, 6b are formed so as to penetrate the bottom plate 2a of the main body case 2, and enter the guide grooves 6a, 6b on the bottom surfaces of the side fences 4a, 4b as shown in FIG. And guide pins 7a and 7b that move along the guide grooves 6a and 6b.

The racks 5a and 5b are rotatably disposed on a bottom plate 2a of the main body case 2 as shown in FIG.
Meshed with the step gear (gear) 8 and the side fence 4
a and 4b move in the width direction of the main body case 2 in conjunction with the racks 5a and 5b via the two-stage gear 8.

A gear (gear mechanism) 9 rotatably disposed on the bottom plate 2a of the main body case 2 meshes with a lower gear of the second gear 8; A gear pulley 10 rotatably disposed on the bottom plate 2a of the first gear 2 meshes with the gear 2a. A wire 11 is engaged with the gear pulley 10, and the wire 11 is also engaged with a pulley 12 rotatably disposed on the rear side (the lower side in FIG. 3) of the main body case 2. As shown in FIGS. 4 and 5, both ends of the wire 11 are connected to springs 13a and 13b, respectively.
And is attached to a guide pin 15 formed on the back surface of the end fence 14 through the center.

A guide groove (guide groove) 16 extending in the paper feeding direction of the main body case 2 (hereinafter, referred to as a paper length direction) is formed so as to penetrate the bottom plate 2a of the main body case 2. The guide pin 15 is provided in the groove 16.
Is movably inserted. Further, a slide groove 17 shallower than the guide groove 16 is formed in the main body case 2, and a positioning groove 18 for positioning the end fence 14 for each sheet size is formed on a side wall of the slide groove 17. I have. A leaf spring (positioning member) 19 attached to the back surface of the end fence 14 shown in FIGS. 3 and 5 is pressed against the side wall of the slide groove 17 with a predetermined pressure. An arc-shaped protruding portion 19a protruding in the side wall direction is formed. Leaf spring 1
When the arc-shaped projection 19a of FIG. 9 comes to the position of the positioning groove 18 of the slide groove 17, the projection 19a
To position the end fence 14 at an appropriate position for each sheet size.

Therefore, the side fences 4a, 4b
Are guide grooves 6a into which the guide pins 7a and 7b are inserted,
6b and guided by racks 5a and 5b meshing with the two-stage gear 8, move in the width direction of the main body case 2, and
By moving, the two-stage gear 8 is rotated. When the second gear 8 rotates, the rotation of the second gear 8 is transmitted to the gear pulley 10 via the gear 9, and the gear pulley 10 rotates. When the gear pulley 10 rotates, the wire 11 rotates between the pulley 12 and, when the wire 11 moves, the end fence 14 connected to the wire 11 moves between the guide groove 16 into which the guide pin 15 is inserted and the leaf spring 19. The main body case 2 is guided by the side wall of the
Move in conjunction with the movement of the side fences 4a and 4b in the length direction of the side fence. At this time, by appropriately setting the number of teeth of the two-stage gear 8, the gear 9, and the gear pulley 10, the amount of movement of the side fences 4a and 4b and the amount of movement of the end fence 14 appropriate for the sheet size to be set are set. be able to. When the projection 19a of the leaf spring 19 enters the positioning groove 18 of the slide groove 17, the end fence 14 and the side fences 4a and 4b can be fixed at appropriate positions on the set sheet.
The guide pins 7a and 7b and the guide grooves 6a and 6b function as side guide means, and the guide pins 15 and the guide grooves 16 function as end guide means. The racks 5a and 5b, the two-stage gear 8, the gear 9, the gear pulley 10, the wire 11, the pulley 12, and the springs 13a and 13b function as connecting means as a whole.

As shown in FIG. 2, a paper size sensor 20 and a paper size sensor 21 are provided in the paper feed base 3 below the guide groove 6a and the guide groove 16, respectively. And paper size sensor 21
A sensor element 20a and a sensor element 21a for detecting the sheet size for each sheet size by being pressed.
Is attached. As described above, the paper size sensor 20 and the paper size sensor 21
Is formed at a position directly below the guide groove 6a and the guide groove 16 when the sheet is set on the sheet supply base 3, the sensor elements 20a and 21a of the sheet size sensor 20 and the sheet size sensor 21 The guide pin 7a of the side fence 4a inserted into the groove 6a and the guide groove 1
6 is pressed by the guide pin 15 of the end fence 14 inserted in the sensor element 20a and the sensor element 21.
When a is pressed by the guide pin 7a and the guide pin 15, the size of the sheet set in the sheet cassette 1 is detected.

Next, the operation of this embodiment will be described. When paper is set in the paper cassette 1 or paper of a different size from the set paper is taken out, the main body case 2 is taken out of the paper base 3 or pulled out from the paper base 3 by a necessary amount. Then, the paper is supplied to the side fences 4a and 4b
Store between.

When the size of the paper to be set does not match the position where the side fences 4a and 4b and the end fence 14 are set, the width of the paper (cassette) is adjusted according to the size of the paper on which the side fences 4a and 4b are set. (The width direction of the main body 2). At this time, since the side fences 4a and 4b have the guide pins 7a and 7b move in the guide grooves 6a and 6b and the racks 5a and 5b mesh with the second gear 8, the side fences 4a and 4b
The rack 5a of the side fence 4a and the rack 5 of the side fence 4b stably move in the width direction of the paper.
b is meshed with the same two-stage gear 8, and when one of the side fences 4a and 4b is moved in the width direction of the sheet, the other side fences 4a and 4b
Move the same amount. Therefore, the side fence 4a and the side fence 4b can be moved by the same amount of movement in the width direction of the sheet with the sheet interposed therebetween, and the sheet can be pinched at the center of the side fence 4a and the side fence 4b. The side fences 4a and 4b can be easily set with the side fences in contact with both side edges of the sheet.

As described above, the side fence 4a,
When 4b is moved, the second gear 8 rotates, the rotation of the second gear 8 is transmitted to the gear pulley 10 via the gear 9, and the gear pulley 10 rotates. When the gear pulley 10 rotates, the wire 11 rotates between the pulley 12 and, when the wire 11 moves, the end fence 14 connected to the wire 11 moves between the guide groove 16 into which the guide pin 15 is inserted and the leaf spring 19. The side fences 4a and 4b move in the length direction of the main body case 2 while being guided by the side wall of the slide groove 17 that abuts. At this time, 2
The number of teeth of the step gear 8, the gear 9, and the gear pulley 10 is set in accordance with the amount of movement of the side fences 4a and 4b and the amount of movement of the end fence 14 appropriate for each sheet size. When the end fence 14 moves, the projection 19a of the leaf spring 19 attached to the end fence 14 enters the positioning groove 18 of the slide groove 17 according to the paper size, and the end fence 14 is properly positioned at the paper position. The side fences 4a and 4b are positioned and fixed by positioning and fixing the end fence 14 at a proper position.

Therefore, by adjusting the position of the side fences 4a and 4b in accordance with the sheet to be set, the end fence 14 is moved in conjunction with the side fences 4a and 4b so that the positioning groove 18 and the leaf spring 19 project to a position corresponding to the sheet size. Part 19
a, the side fences 4a, 4b and the end fence 14 can be easily and appropriately adjusted and positioned. As a result, the usability of the sheet cassette 1 can be improved.

Since the wire 11 is connected to the end fence 14 via the springs 13a and 13b,
The end fence 14 and the side fence 4a are stably placed at appropriate positions by absorbing the expansion and contraction of the wire 11 and the manufacturing errors of the two-stage gear 8, the gear 9, the gear pulley 10, the leaf spring 19, and the like. , 4b can be positioned and fixed.

Further, when the side fences 4a and 4b are moved and the end fence 14 is moved accordingly,
Since the guide pin 7a of the side fence 4a and the guide pin 15 of the end fence 14 press the sensor element 20a of the paper size sensor 20 and the sensor element 21a of the paper size sensor 21 provided on the base 3, the guide pin 7
The width of the paper can be detected by the sensor element 20a pressed by a, and the length of the paper can be detected by the sensor element 21a pressed by the guide pin 15. Therefore, the paper size sensor 2
The paper size is determined from 0 and the width and length sizes of the paper detected by the paper size sensor 21 and the paper size is displayed on an operation display unit of an image forming apparatus such as a facsimile apparatus to which the paper cassette 1 is applied. In addition, various processes necessary for appropriate image formation can be performed based on the relationship with the recorded image size, and the usability of the sheet cassette 1 can be improved.

Although the invention made by the inventor has been specifically described based on the preferred embodiments, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the invention. It goes without saying that it is possible.

For example, in the above-described embodiment, a case has been described in which the side fences 4a and 4b are moved according to the sheet size. However, the end fence 14 may be moved according to the sheet size.

In the above embodiment, the side fence 4a and the side fence 4b are configured to move together.
The same applies to the case where only b moves.

Further, in the above-described embodiment, the press type sensor is used as the paper size sensors 20 and 21. However, the paper size sensor is not limited to the press type sensor, and the paper size sensor may be appropriately adjusted. May be used as long as it can detect the light.

[0045]

According to the paper feed cassette of the present invention, the side fence is guided by the side guide means so as to be movable in the width direction of the sheet, and the end fence is movable so as to be movable in the length direction of the sheet. When one of the side fence and the end fence is moved and adjusted according to the sheet, guided by the guide means, the other is moved in conjunction with the movement of the one side by the connecting means. By simply moving one of the end fences, the position of the other end can be adjusted automatically, making it easier and easier to adjust the position of the end fence and side fence when loading paper of different sizes. Can be.

According to the paper feed cassette of the present invention, the connecting means includes a rack member fixed to the side fence and extending in the width direction of the paper, and a gear meshing with the rack member and rotating. A gear mechanism that meshes with the gear, a gear pulley that is disposed on the leading end side of the sheet in the movement direction of the end fence, meshes with the gear mechanism, and rotates in conjunction with the gear mechanism,
A pulley disposed on the rear end side of the sheet in the moving direction of the end fence, a wire stretched between the gear pulley and the pulley and connected to the end fence, and a spring for giving the wire a predetermined elasticity. With a simple configuration, simply move one of the side fence and end fence and automatically adjust the position of the other. The work of adjusting the position of the side fence can be made simple and easy.

According to the paper feeding cassette of the third aspect of the present invention, the side guide means is provided with a guide groove formed along the moving direction of the side fence, and the leading end formed in the guide groove formed on the side fence. Guide fences, and with a simple configuration, the side fence can be moved appropriately in the width direction of the paper, and the position of the end fence and side fence when setting paper of different sizes The adjustment work can be made simple and easy.

According to the paper feed cassette of the fourth aspect of the present invention, the end guide means is provided with a guide groove formed along the moving direction of the end fence, and a guide groove formed on the end fence and provided with a leading end. With the inserted guide pin, the end fence can be appropriately moved toward the front and rear edges of the paper with a simple configuration,
The work of adjusting the position of the end fence and the side fence when setting sheets of different sizes can be made simple and easy.

According to the paper feed cassette of the invention, the end guide means is formed with the slide groove formed along the moving direction of the end fence and the end fence formed on the side wall of the slide groove. A positioning groove for positioning the end fence at a position corresponding to various sizes of paper; and a positioning groove formed on the end fence and pressed into a side wall on which the positioning groove of the slide groove is formed by a predetermined elastic force to enter the positioning groove. Since it is provided with the member, the end fence can be moved more stably, and the end fence can be appropriately positioned.

According to the paper feed cassette of the present invention, since the width and length of the set paper are detected by the paper size sensor, the size of the set paper can be easily known. Thus, the usability of the paper feed cassette can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a paper feed cassette to which an embodiment of the paper feed cassette of the present invention is applied.

FIG. 2 is a perspective view of a base of the image forming apparatus in which the sheet cassette shown in FIG. 1 is set.

FIG. 3 is a plan view of the sheet cassette shown in FIG. 1;

FIG. 4 is a view taken in the direction of the arrow A in FIG. 3;

FIG. 5 is a rear perspective view of the end fence of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper feed cassette 2 Main body case 2a Bottom plate 3 Base 4a, 4b Side fence 5a, 5b Rack 6a, 6b Guide groove 7a, 7b Guide pin 8 Two-stage gear 9 Gear 10 Gear pulley 11 Wire 12 Pulley 13a, 13b Spring 14 End fence 15 Guide pin 16 Guide groove 17 Slide groove 18 Positioning groove 19 Leaf spring 19a Projection 20, 21 Paper size sensor 20a, 21a Sensor element

Claims (6)

[Claims] A plurality of sheets are accommodated in a main body case, and both ends in the width direction of the sheet are held by side fences, and a rear end in the length direction of the sheet is held by an end fence. A sheet cassette in which the sheet is fed in the front end direction of the sheet, wherein the side fence is guided by side guide means so as to be movable in the width direction of the sheet in the main body case, and the end fence is In the main body case, the sheet is guided by end guide means so as to be movable in the length direction of the sheet, the side fence and the end fence are connected by predetermined connection means, and one of the side fence and the end fence is the When the movement is adjusted in accordance with the paper, the other is moved in conjunction with the movement of the one by the connecting means. Paper cassette. 2. A rack member fixed to the side fence and extending in the width direction of the paper, a gear meshing with the rack member and rotating, and a gear mechanism meshing with the gear. A gear pulley disposed on the front end side of the sheet in the moving direction of the end fence, meshing with the gear mechanism and rotating in conjunction with the gear mechanism; and a rear end of the sheet in the moving direction of the end fence. A pulley disposed on the side, a wire stretched between the gear pulley and the pulley and connected to the end fence, and a spring connected to the wire and giving the wire a predetermined elasticity. The paper cassette according to claim 1, wherein 3. The side guide means includes: a guide groove formed along a moving direction of the side fence; and a guide pin formed in the side fence and having a leading end inserted into the guide groove. The sheet cassette according to claim 1, wherein the sheet cassette is provided. 4. The end guide means includes: a guide groove formed along a moving direction of the end fence; and a guide pin formed in the end fence and having a distal end inserted into the guide groove. The sheet cassette according to any one of claims 1 to 3, wherein the sheet cassette is provided. 5. The end guide means includes: a slide groove formed along a moving direction of the end fence; and a position formed on a side wall of the slide groove and corresponding to various sizes of paper on which the end fence is set. A positioning groove for positioning the end fence; a positioning member formed on the end fence and pressed by a side wall of the slide groove on which the positioning groove is formed to enter the positioning groove. The paper feed cassette according to any one of claims 1 to 4, wherein: 6. The paper cassette includes a paper size sensor for detecting a width and a length of the set paper, respectively.
The paper feed cassette according to claim 1, further comprising: