JPH07441Y2 - Paper storage device holding structure for paper feeder - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention provides a paper storage unit in a paper feed section of a main body of an apparatus using paper such as a copying machine, a printer, and a facsimile machine in a direction orthogonal to the paper feed direction. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet storage body holding structure of a sheet feeding device that holds a sheet in a removable manner.

[Conventional technology]

The copying machine includes, for example, a sheet feeding device as shown in FIG. 7 (only a main part is shown for simplification) described in Japanese Patent Laid-Open No. 63-101223.

This paper feeding device holds a paper feeding cassette 1 which is a paper storage body in a direction of an arrow A orthogonal to the paper feeding direction so that it can be inserted into and removed from a main body paper feeding unit 2, and both sides of the paper feeding cassette 1 are held. Convex part on the surface
Guide grooves 3, 4, 5, which are formed with 1a to 1d, respectively, and into which the respective convex portions 1a to 1d are fitted to the main body sheet feeding section 2 side so that they can be guided.
6 are formed respectively, and when the paper feed cassette 1 is pulled out from the paper feed position in the main body paper feed unit 2, each convex portion 1a to
1d is guided diagonally downward by the guide grooves 3, 4, 5, 6.
The paper feed cassette 1 can be pulled out at a position lower than the paper feed position.

[Problems to be solved by the device]

However, in the case of the sheet feeding device as described in Japanese Patent Laid-Open No. 63-101223, the position is lowered when the sheet feeding cassette is pulled out. There is no risk of damaging the filler part of the paper end sensor that detects the presence of paper in the provided paper cassette due to side fences when pulling it out, but when the paper cassette is pulled out vigorously. Was anxious about the safety because it could fall on the feet of the worker.

Therefore, it is possible to install a fixed stopper so that the paper cassette does not fall from the main unit paper feed unit so that it does not come off from the main unit paper feed unit. It is inconvenient because the cassette cannot be replaced, and when the stopper is of a type that can be released, the operation is troublesome and the number of parts is large, which also causes inconvenience.

The present invention has been made in view of the above problems, and it is possible to pull out a paper storage body such as a paper feed cassette from the main body paper feed section without damaging other parts. Moreover, the paper storage unit can be removed from the main unit paper feed unit by a simple operation so that it does not fall from the main unit paper feed unit even if the paper storage unit is pulled out vigorously. With the goal.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention achieves the above-mentioned object. A sheet of a sheet feeding device for holding a sheet storage unit in a sheet feeding section of a main body of a device such as a copying machine using a sheet in a direction orthogonal to the sheet feeding direction. In the storage body holding structure, the main body sheet feeding section guides the upper side guide portions on both sides in the insertion / removal direction of the paper sheet storage section and regulates the vertical position of the paper sheet storage section. Top guide that forms a stopper part that regulates the amount of withdrawal from the unit to a predetermined amount, and the height of the paper container when the paper container is inserted into the paper feed position of the main body paper feed part And a rising protrusion that also raises the upper end of the sheet storage body. The stopper is disposed on the upper surface of the rear end portion of the sheet storage body in the drawing direction so as to be engageable with the stopper portion of the upper surface guide and the upper surface is guided by the upper surface guide. Dual projection
The lower surface is provided with an inclined surface for inclining the sheet storage body in order to release the engagement between the stopper-cum-projection and the stopper portion.

[Action]

According to the sheet storage body holding structure of the sheet feeding device configured as described above, when the sheet storage body is pulled out from the sheet feeding position of the main body sheet feeding portion, the bottom portion thereof slides on the rising projection portion and passes therethrough. And the paper storage body is lowered by the height of the raised protrusion,
In this state, the upper surface of the stopper / projection at the rear end of the paper container is pulled out while being guided by the upper surface guide, and if the stopper / projection contacts the stopper part of the upper surface guide, it cannot be pulled out any further. In other words, the amount of pulling out the paper storage unit from the main body paper feed unit is restricted to a predetermined amount.

Also, when removing the paper storage unit from the main unit paper feed section, if you lift the front end side of the paper storage unit in the pull-out direction at the above-mentioned maximum restricted drawing position, the bottom surface of the rear end of the paper storage unit Since the inclined surface is formed, the sheet storage body can be rotated by using that portion, the position of the stopper / protrusion is lowered, and the engagement with the stopper portion can be released.

Therefore, the paper storage unit can be removed from the main body paper feeding unit by pulling it out as it is.

And when inserting the paper storage unit into the main body paper feed section,
This can be easily done by performing the reverse operation to the above case.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a state in which a paper feed cassette, which serves as a paper storage body of a paper feed apparatus to which the paper storage body holding structure according to the present invention is applied, is inserted into a main body paper feed section, and FIG. FIG. 3 is a configuration diagram showing a state in which the cassette is pulled out from the main body sheet feeding portion, and FIG. 3 is an external perspective view showing the vicinity of the sheet feeding device of a copying machine having the same sheet feeding device.

As shown in FIG. 3, the paper feeding device 10 includes a paper feeding cassette 12 which is a paper storage body, and a paper feeding cassette accommodating portion 11 which is a part of a main body paper feeding portion so that a paper feeding direction of an arrow B is indicated. It is held so that it can be inserted and removed in the direction of arrow C, which is orthogonal to.

Then, the paper cassette 12 is placed in the paper cassette storage unit 11.
Side portion 1 of both side portions 12a, 12b with respect to the insertion / removal direction of arrow C in FIG.
The upper side guide portions 13a and 13b shown in FIG. 1 on the 2a side are respectively guided and the vertical position is regulated, and the amount of pulling out the sheet feeding cassette 12 from the sheet feeding cassette accommodating portion 11 is set to a predetermined amount l (first 2), the upper surface guide 14 having the stopper 14a formed therein and the sheet feeding cassette 12 are inserted into the sheet feeding position of the sheet feeding cassette accommodating portion 11 shown by the solid line in FIG. An ascending protrusion 16 and an opening-side ascending protrusion 26 are provided to raise 12 above the height during insertion / removal shown by phantom lines.

Similarly, on the side portion 12b side of the sheet feeding cassette 12 of the sheet feeding cassette accommodating portion 11, although a description will be given later, the upper surface guide 14 and the rising protrusions 16, the upper surface guides corresponding to the opening side rising protrusions 26 and the respective A rising protrusion and an opening-side rising protrusion are provided respectively.

The ascending protrusion 16 is formed on the left side of the bottom portion 11d of the paper feed cassette accommodating portion 11 in FIG. 1, and the bottom portion 11d is narrowed down to a height H ₁ so that the upper surface is horizontal and the right side is gentle. It is on a slope.

The opening-side rising protrusion 26 is integrally attached to the right bottom portion 11d of the rising protrusion 16, and the height H ₂ thereof is substantially the same as the height H ₁ of the rising protrusion 16. At the same time, the upper surface on the left side is formed as a gentle slope.

Then, to the right of the opening-side upward protrusion 26, a guide roller 27 for facilitating the insertion / removal of the paper feed cassette 12 into / from the paper feed cassette accommodating portion 11 is rotated in the direction of the arrow by a support member (not shown). Supports freely.

On the other hand, on the side of the paper feed cassette 12, the stopper portion of the upper surface guide 14 is provided on the upper surface of the rear end portion (left side in FIG. 1) in the drawing direction.
The upper surface 21a is disposed so as to be engageable with the upper surface 21a as shown in FIG.
Is provided with the stopper / projection 21 guided by the guide surface 14c of the upper surface guide 14 and the stopper / projection 21 on the lower surface.
And the stopper 14a to disengage the paper cassette 12
4 are respectively provided with inclined surfaces 18 capable of inclining to the positions shown in FIG.

Then, on the lower surface of the paper feed cassette 12, the paper feed cassette 12
Of the paper feed cassette accommodating portion 11 to the paper feed position shown by the solid line in FIG.
Corresponding to 16 and the opening-side rising protrusion 26, protrusions 12c, 12d arranged so as to ride on the upper part thereof are provided,
The lower surface of the protrusion 12c is a horizontal surface, and the left side of the protrusion 12c and the left and right sides of the protrusion 12d are formed as gentle slopes, and the protrusion heights H ₃ and H ₄ are both raised to the height H of the protrusion 16. ₁ and the height H _{2 of the} opening-side ascending projection 26 are substantially the same, and the height H ₅ from the upper surface side guide portion 13b of the stopper / projection projection 21 to the upper surface 21a
Both are almost the same.

It should be noted that the protrusions 12c, 12d are located on the rear side in FIG.
A protrusion having the same shape as 2d is provided.

As shown in FIG. 3, the sheet feeding device 10 includes a pair of side fences 22 and 23 (see FIG. 6), which are movable in the arrow C direction, inside the sheet cassette 12, and an arrow B. And a back fence 24 movable in the opposite direction,
The transfer paper P to be stored by them is regulated at a predetermined position, and the transfer paper P is rotatably provided in the upper part of the paper feed end side of the paper feed cassette 12 by the paper feed roller 25. P is sent out from the paper feed cassette 12.

As shown in FIG. 5 (the paper feeding cassette 12 is not shown in cross section for simplification of the drawing), the paper feeding cassette accommodating portion 11 has an upper portion 11a, left and right side portions 11b and 11c, a bottom portion 11d, and an inner portion 11e ( First
And a part of the upper part 11a on the side of the paper feeding end is opened, and the transfer paper in the paper feeding cassette 12 is transferred to the fifth position.
In the figure, the sheet can be fed to the right, and in the figure, the front side is opened so that the sheet cassette 12 can be pulled out.

Then, on the left side portion 11b, the vertical surface of the upper surface guide 14 bent in the shape of L is fixedly provided, and the upper surface side guide portions 13a and 13b (see also FIG. 1) of the sheet feeding cassette 12 can be guided on the horizontal surface 14b. Then, the upper surface guide 15 corresponding to the upper surface guide 14 is formed on the right side portion 11c by horizontally bending the upper end of the right side portion 11c inward, whereby the sheet feeding cassette 12 is formed.
The upper surface side guide portions 13a and 13b on the side portion 12b side can be guided.

Further, on the side 11c side of the bottom portion 11d, corresponding to the opening-side ascending protrusion 26 and the guide roller 27, the same opening-side ascending protrusion 28 and guide roller 29 are provided.

Next, the internal structure of the paper feed cassette 12 and the positioning of the paper feed cassette accommodating portion 11 will be described with reference to FIG.

Inside the paper feed cassette 12, the support portions 31a and 31b are rotatably attached to the front and rear side walls 12e and 12f of the paper feed cassette 12 with attachment pins or the like so as to have an H shape when viewed from above. Bottom plate
31, two springs 32 for urging the transfer paper P in the paper feed cassette 12 to the upward side via the bottom plate 31, and claw parts 33a at both corners on the paper delivery end side. Further, a pair of separating claws 33, 33, a pair of side fences 22, 23, and a back fence 24 are provided, respectively.

Then, when the magnets 34, 34 are attached to the outside of the front side wall 12e with a space therebetween, and when the magnets 34, 34 are brought into contact with the positioning side plate 35 integrated with the paper feed cassette accommodating portion 11, it is adsorbed and fed. The cassette 12 is positioned at the sheet feeding position shown by the solid line in FIG.

As described above, since the paper feeding device 10 is configured and holds the paper feeding cassette 12, when the paper feeding cassette 12 is pulled out from the paper feeding position by replenishing transfer paper or the like,
Hold the handle (not shown) and pull it out to the right from the position shown by the solid line in the figure, and first pull out the paper cassette.
While the protrusions 12c and 12d of 12 are on the ascending protrusion 16 and the opening-side ascending protrusion 26 of the paper feed cassette accommodating portion 11, the upper surface side guide portion 13b is guided by the guide surface 14c of the upper surface guide 14. You can pull it out without rattling up and down.

Then, when the projecting portions 12c and 12d are disengaged from the ascending protrusion 16 and the opening-side ascending protrusion 26 and the sheet feeding cassette 12 is pulled out to the position shown by the phantom line in FIG. 1, the sheet feeding cassette 12
Is lower by the height H _1, so that the upper surface 21a of the stopper / projection 21 on the rear side is the guide surface 14c of the upper surface guide 14 this time.
The height H _{5 of the} stopper 21
As described above, since it is set to be substantially the same as H ₁ and H _{3 in} FIG. ₁ , it is continuously pulled out to the right without rattling up and down.

In this way, when the paper feed cassette 12 is pulled out to the position shown in FIG.
It comes into contact with the stopper part 14a and cannot be further pulled out. Therefore, the drawing stroke of the paper feed cassette 12 becomes the predetermined amount 1 in FIG.

As described above, according to the sheet storage body holding structure of this embodiment, even if the operator pulls the sheet cassette 12 violently and vigorously, the sheet cassette 12 has the stopper / protrusion 21 and the stopper 21 of the upper surface guide 14. Since the amount of pull-out is surely regulated by contacting the portion 14a, there is no risk that the paper feed cassette 12 will fall to the feet.

Further, in order to change the size of the transfer paper in the paper feed cassette 12, when the paper feed cassette 12 is removed from the paper feed cassette accommodating section 11 in order to be replaced with another one, the paper feed cassette in the state shown in FIG. If you lift the right side of 12, the paper cassette 12
Since the inclined surface 18 is provided at the rear end of the
The paper cassette 12 is a projection that also serves as a stopper, as shown in FIG.
Since it can be tilted to a position where the engagement between 21 and the stopper portion 14a can be released, it can be easily removed by pulling it to the right in that tilted state.

Further, when the paper feed cassette 12 is inserted into the paper feed cassette accommodating portion 11, it can be easily inserted by performing the reverse operation to that described above, and the paper feed cassette 12 is shown in FIG. When it is inserted to the paper feed position, the magnet 34 shown in FIG. 6 is attracted to the positioning side plate 35, and the paper feed cassette 12 is reliably positioned at the paper feed position.

As described above, in this embodiment, the height of the sheet feeding cassette 12 in the middle of insertion / removal with respect to the sheet feeding cassette accommodating portion 11 becomes lower than the height of the sheet feeding position by H ₁ (the same as H _{2 to} H ₅ ). Therefore, the filler or the like of the paper end sensor is not damaged when pulling out the paper feed cassette 12.

Further, since the heights H _{1 to} H ₅ in FIG. ₁ are all set to be substantially the same, even if the insertion / removal position of the paper feed cassette 12 with respect to the paper feed cassette accommodating portion 11 is at any position. The paper feed cassette 12 can be slid vertically without rattling.

When the sheet cassette 12 is inserted into or removed from the sheet cassette accommodating portion 11, the side portion 12 of the sheet cassette 12 described with reference to FIG.
The b-side upper surface guide 15 functions similarly to the upper surface guide 14.

An example in which the present invention is applied to a sheet feeding device of a copying machine has been described above. However, the present invention can be similarly applied to a sheet feeding device of an image forming apparatus such as a printer or a facsimile machine other than the copying machine. .

[Effect of device]

As described above, according to the paper container holding structure of the paper feeder according to the present invention, when the paper container such as the paper cassette is pulled out from the main body paper feeding unit, it is done without damaging other parts. In addition, when removing the paper storage unit from the main body paper feeding unit as in the case of changing the paper size, it can be performed by a simple operation.

In addition, even if the paper storage body is pulled out vigorously, if the paper storage body is pulled out by a predetermined amount, the stopper-cum-projection will engage with the stopper part of the upper surface guide so that it cannot be pulled out any more. It is safe because the body does not fall from the main body paper feed section.

Furthermore, the insertion / removal operation for the main body paper feed unit of the paper storage body,
It can be performed smoothly without wobbling and can be manufactured at low cost because of its simple structure.

[Brief description of drawings]

FIG. 1 is a block diagram showing a state in which a paper feed cassette, which serves as a paper storage body of a paper feed device to which the paper storage body holding structure according to the present invention is applied, is inserted into a main body paper feed section, and FIG. FIG. 3 is a configuration diagram showing a state in which the cassette is pulled out from the paper feeding unit of the main body, FIG. 3 is an external perspective view showing the vicinity of the paper feeding device of a copying machine having the same paper feeding device, and FIG. FIG. 5 is a side view showing a partial cross-section of a state in which the paper cassette 12 is tilted for removal from the paper cassette accommodating portion 11, FIG. 5 is a cross-sectional view taken along the line EE of FIG. 3, and FIG. FIG. 7 is a plan view for explaining the internal structure and positioning with respect to the paper feed cassette accommodating portion 11, and FIG. 7 shows the paper feed device of the copying machine as a main part for explaining the paper accommodating body holding structure of the conventional paper feed device. It is the perspective view which simplified and showed only. 10 …… Paper feeder 11 …… Paper cassette storage unit (Main unit paper feed unit) 12 …… Paper cassette (Paper storage unit) 12a, 12b …… Side part 13a, 13b …… Top guide unit 14,15 ...... Top guide, 14a ・ ・ ・ Stopper part 16 …… Ascending protrusion, 18 …… Sloping surface 21 …… Stopper combined protrusion, 21a …… Top face 26, 28 …… Opening side ascending protrusion P …… Transfer paper (paper )

Claims (1)

[Scope of utility model registration request] 1. A paper container holding structure for a paper feeding device, wherein a paper container is detachably held in a paper feeding unit of a main body of a device using paper such as a copying machine, in a direction orthogonal to the paper feeding direction. Guide the upper-side guide portions on both sides of the main body paper feed section with respect to the insertion / removal direction of the paper storage body and regulate the vertical position to control the amount of pulling out the paper storage body from the main body paper feed section. An upper surface guide formed with a stopper portion that regulates a predetermined amount, and a rising protrusion that raises the paper storage body above the height during insertion / removal when the paper storage body is inserted into the paper feed position of the main body paper feed portion. And a stopper / protrusion that is disposed on the upper surface of the rear end portion of the sheet storage body in the pulling-out direction so as to be engageable with the stopper portion of the upper surface guide, and the upper surface is guided by the upper surface guide.
A sheet storage body holding structure for a sheet feeding device, wherein an inclined surface for inclining the sheet storage body is provided on the lower surface to release the engagement between the stopper-cum-projection and the stopper portion.