JP3045808U - Separate paper feeder - Google Patents

Abstract

(57) [Summary] [Object] To reduce the number of parts of a separation sheet feeding device 20 used for automatic feeding of a document 10 in a facsimile. [Structure] A leaf spring member 2 is attached to an upper cover B of a facsimile.
3 is attached. The leaf spring member 23 includes a mounting portion 23a.
A first leaf spring portion 23b inclined downward from the downstream edge of the attachment portion 23a and extending downstream; and a first leaf spring portion 23b inclined downward from the upstream edge of the attachment portion 23a and extended downstream. And a second leaf spring portion 23c protruding therefrom. First leaf spring portion 23
b presses the separation pad 22 against the surface of the paper feed roller 21. The second leaf spring portion 23c presses the document 10 against the surface of the paper feed roller 21 on the upstream side of the separation pad 22. A holder for holding the separation pad 22 and a spring for urging the holder are not required.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a separation sheet feeding device used for automatic feeding of a document in a facsimile, a scanner, or the like, or a recording sheet in a printer.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, a separation paper feeder in which a paper feed roller and a separation pad pressed against the paper feed roller are combined has been frequently used for automatic feeding of a document in a facsimile. FIG. 5 shows a conventional example of the separation sheet feeding device.

The separation sheet feeding device shown here includes a sheet feeding roller 1 and a separation pad 2 pressed against the sheet feeding roller 1 from above. A part of the paper feed roller 1 projects above the guide plate 3 through an opening provided in the lower guide plate 3. The separation pad 2 is made of a flexible material such as rubber, silicon or the like, and is attached to a holder 4 rotatably provided above the paper feed roller 1. The holder 4 also serves as a holding member for a pressing spring 5 composed of a leaf spring for pressing the document 10 against the paper feed roller 1. Being energized.

A plurality of originals 10 are set with their leading ends inserted between the paper feed roller 1 and the separation pad 2 from the upstream side of the paper feed roller 1. In this state, when the paper feed roller 1 rotates in the paper feed direction (clockwise in the figure), only the lowermost document 10 that directly contacts the paper feed roller 1 is discharged downstream, and the other documents 10 are separated from the separation pad. 2 stops at the original position. At this time, the pressing spring 5 presses the lowermost document 10 on the upstream side of the separation pad 2 against the paper feed roller 1 to smoothly discharge the document 10. The discharged document 10 passes between the lower guide plate 3 and the upper guide plate 7 and is sent to the downstream reading unit.

The paper feed roller 1 is provided on the main body of the facsimile together with the lower guide plate 3, and the separation pad 2 and the like combined with the paper feed roller 1 are provided on the upper cover side of the facsimile together with the upper guide plate 7. It is common.

[0006]

[Problems to be solved by the invention]

 However, the conventional separation paper feeder has a large number of parts compared to its function and has a complicated structure.

That is, it is considered that the paper feed roller 1 and the separation pad 2, which are main components of the separation paper feeder, and the pressing spring 5 for pressing the document 10 against the paper feed roller 1 are necessary. A holder 4 for holding and a spring 6 for urging the holder 4 are required, and the holder 4 is a complicated resin molded product.

[0008] As described above, the conventional separation paper feeder has a relatively large number of parts, and the resulting increase in parts cost and assembly cost is one of the causes for increasing the facsimile manufacturing cost.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a separation sheet feeding device capable of reducing the number of parts while maintaining the same function as that of the related art. .

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the separation sheet feeding device according to the present invention is configured such that a plurality of sheets inserted between a sheet feeding roller and a separation pad pressed against the sheet feeding roller are fed to the sheet feeding roller. In a separation sheet feeding device that sequentially discharges sheets one by one to a downstream side by rotation, a first leaf spring portion that presses a separation pad against a sheet feeding roller, and presses a sheet against a sheet feeding roller upstream of a position where the separation pad is pressed. There is provided a leaf spring member integrally formed with the second leaf spring portion.

When such a leaf spring member is used, the separation pad is pressed against the paper feed roller by the integrally formed first leaf spring portion, and the paper is pressed against the paper feed roller by the second leaf spring portion. This eliminates the need for a holder for holding the separation pad and a spring for urging the holder.

[0012] The leaf spring member includes an attaching portion for attaching the leaf spring member to the device, a first leaf spring portion inclined from a downstream edge of the attaching portion and extending downstream, and an attaching portion. And a second leaf spring portion which is inclined from the upstream edge and extends downstream.

The leaf spring member is also attached to the device by fixing the attachment portion to a projection protruding from the device, and a pair of second plates extending from both sides of the upstream edge of the attachment portion. The paper is pressed against the paper feed roller by the spring, and the separation pad, whose upstream end is locked by the projection, is pressed and fixed by the third leaf spring extending from between the pair of second leaf springs. This is particularly preferable because the structure is simple and the components including the separation pad can be easily mounted.

[0014]

[Embodiment of the invention]

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of a separation sheet feeding device according to an embodiment of the present invention, FIG. 2 is a schematic longitudinal sectional side view of a main part of the separation sheet feeding device according to an embodiment of the present invention, and FIG. FIG. 4 is a side view and a bottom view of a leaf spring member used in the separation sheet feeding device according to the embodiment, and FIG. 4 is a schematic side view of a facsimile using the separation sheet feeding device according to the embodiment of the present invention.

As shown in FIG. 4, the separation sheet feeding device according to the embodiment of the present invention is used in a facsimile in which an upper cover B is attached to an upper surface of a main body A. In this facsimile, originals 10 set on a tray C are separated one by one by a separation paper feeder 20 and sent out to a paper transport path formed between a main body A and an upper cover B, and are read in the process. The document 30 is read by the unit 30 and transmitted. For reception, the printing unit 40 is driven based on the received data, thereby printing on the thermal paper 50 and discharging the paper.

The reading section 30 includes a reader 31 provided on the main body A of the facsimile, and a paper feed roller 32 attached to the upper cover B. The reader 31 faces the paper transport path between the main body A and the upper cover B through an opening provided in the top plate of the main body A. The paper feed path 32 is provided opposite to the reader 31 and conveys the document 10 passing through the paper transport path to the downstream side while pressing the original 10 against the reader 31.

The printing unit 40 is provided on the main body A of the facsimile. The printing unit 40 includes a thermal head 41, a bracket 42 for supporting the thermal head 41, and a paper feed roller 43 provided opposite the thermal head 41. The thermal head 41 is operated while the thermal paper 50 set in the main body A is drawn out by the paper feed roller 43 while being wound in a roll shape, thereby performing printing on the thermal paper 50.

The separation paper feeder 20 according to the embodiment of the present invention provided in such a facsimile is provided on the upstream side of the reading unit 30 of the facsimile, at the center in the width direction of the paper conveyance path. ing.

As shown in FIG. 1, the separation sheet feeding device 20 includes a sheet feeding roller 21, a separation pad 22 pressed against the sheet feeding roller 21 from above, and a separation pad 22 to the sheet feeding roller 21. And a leaf spring member 23 for pressing the original 10 against the paper feed roller 21.

The paper feed roller 21 is provided on the main body A of the facsimile, and a part of the guide plate a is formed through an opening provided in the lower guide plate a formed by the top plate of the main body A. It protrudes upward. The separation pad 22 is inclined downward at a predetermined angle toward the downstream side.

The separation pad 22 and the leaf spring member 23 are mounted on the upper cover B side of the facsimile. For this attachment, the upper cover B includes a holding portion B1 extending from the upstream side to the downstream side, and a projection B2 protruding upward from the upper surface of the distal end portion of the holding portion B1. The holding portion B1 is a plate material having substantially the same width as the separation pad 22, and is inclined downward at an inclination angle required for the separation pad 22.

As shown in FIG. 2, the separation pad 22 made of a flexible material such as rubber or silicon has an opening 22a at the upstream end into which the projection B2 is inserted. Then, by inserting the projection B2 into the opening 22a, the separation pad 22 is locked to the projection B2.

The leaf spring member 23 is formed by bending and bending an elastic metal plate. As shown in FIG. 3, a flat mounting portion 23a and a downstream edge of the mounting portion 23a are provided. A first leaf spring portion 23b inclined downward from the first portion and extending to the downstream side, a second leaf spring portion 23c inclined downward from the upstream edge of the mounting portion 23a and extending to the downstream side, and And a third leaf spring portion 23d.

The mounting portion 23a is fixed to the upper surface of the projection B2 with a screw 24. By this fixing, the leaf spring member 23 is attached to the projection B2. For this screwing, a screw hole 23e is provided in the mounting portion 23a.

As shown in FIG. 3B, the first leaf spring portion 23b extends from a portion excluding both sides of the mounting portion 23a. The width of the first leaf spring portion 23b is substantially the same as the width of the separation pad 22 and the holding portion B1. The tip of the first leaf spring portion 23b has a smaller downward inclination angle than the other portions so as to make surface contact with the downstream end of the separation pad 22. Then, the first leaf spring portion 23 b elastically presses the end on the downstream side of the separation pad 22 at its tip end, and presses this end against the surface of the paper feed roller 21.

As shown in FIG. 3B, the third leaf spring portion 23d extends from a portion except for both side portions of the mounting portion 23a similarly to the first leaf spring portion 23b. The width is substantially the same as the width of the spring portion 23b. Then, the third leaf spring portion 23d fixes the separation pad 22 in a predetermined inclined posture by pressing the upstream end of the separation pad 22 locked to the projection B2 against the holding portion B1.

As shown in FIG. 3B, the second leaf spring portions 23c extend from both sides of the mounting portion 23a. The second leaf spring portions 23c on both sides are located on both sides of the first leaf spring portion 23b and the third leaf spring portion 23d, and the leading end curved in an arc shape without interfering with the separation pad 22 has a sheet feeding roller 21. Pressed against the surface of the As shown in FIG. 1, this pressing position is on the upstream side of the position where the separation pad 22 is pressed against the surface of the sheet feeding roller 21 by the first leaf spring portion 23b.

Next, the function of the separation sheet feeding device according to the embodiment of the present invention will be described.

When the original 10 is not set on the tray C, the downstream end of the separation pad 22 is pressed against the surface of the paper feed roller 21 by the tip of the first leaf spring portion 23 b of the leaf spring member 23. ing. Further, the tip of the second leaf spring portion 23c is pressed against the surface of the paper feed roller 21.

When a plurality of documents 10 are set on the tray C, the leading ends of the plurality of documents 10 are inserted between the paper feed roller 21 and the separation pad 22, and the leading ends of the plurality of documents 10 are leaf spring members 23. The second leaf spring portion 23c is pressed against the paper feed roller 21 by the tip portion. When the paper feed roller 21 rotates in the paper feed direction (clockwise in the figure) in this state, only the lowermost document 10 that directly contacts the paper feed roller 21 is discharged downstream, and the other documents 10 are separated from the separation pad 22. Is retained in the original position.

As a result, the plurality of originals 10 set on the tray C are sequentially sent from the bottom to the upper and lower guide plates a and b.

Except for the screw 24, the number of components of the separation sheet feeding device 20 is three, namely, the sheet feeding roller 21, the separation pad 22, and the leaf spring member 23. Considering that the paper feed roller, the separation pad, the holder, the leaf spring, and the spring were conventionally required to obtain the same function, it is apparent that the number of parts in the separation paper feeder 20 is greatly reduced. is there.

That is, in the separation sheet feeding device 20, the respective functions of the conventional holder, the leaf spring, and the spring are integrated in the leaf spring member 23.

Moreover, in the leaf spring member 23, the first leaf spring portion 23b extends from the downstream edge of the mounting portion 23a, and the second leaf spring portion 23c extends from the upstream edge thereof. And the structure is simple and easy to manufacture. Further, the second leaf spring portion 23c extends from both sides of the upstream edge portion, and the third leaf spring portion 23d for fixing the separation pad 22 is provided therebetween. Installation of the parts, including them, is easy.

In the above embodiment, the leaf spring member 23 is attached to the upper surface of the projection B 2 provided on the upper cover B. However, it can be attached to the lower surface of the upper cover B together with the separation pad 22. . In that case, the second leaf spring portion 23c can be extended from the center of the mounting portion 23a.

In the above-described embodiment, the separation pad 22 is pressed against the paper feed roller 21 from above, but the present invention is not limited to this. For example, on the contrary, the separation pad 22 may be provided below the paper feed roller 21 and pressed from below.

Further, the separation sheet feeding device can be used not only for a facsimile but also for a separation sheet feeding device used for automatically supplying a document in a scanner or the like or a recording sheet in a printer. is there.

[0038]

[Effect of the invention]

 As described above, the separation sheet feeding device according to the present invention includes the first leaf spring portion that presses the separation pad against the sheet feeding roller, and the second leaf spring portion that presses the sheet against the sheet feeding roller upstream of the position where the separation pad is pressed. By providing the plate spring member integrally formed with the plate spring portion, it is possible to greatly reduce the number of parts while maintaining the same function as in the related art. Therefore, it can be applied to, for example, a facsimile to reduce the manufacturing cost.

In the separation sheet feeding device according to the second aspect, the first leaf spring portion extends from the downstream edge portion of the mounting portion, and the second leaf spring portion extends from the upstream edge portion. Since the spring member is used, the structure of the leaf spring member is simple and easy to manufacture.

In the separation sheet feeding device according to the third aspect, the second plate spring portion extends from both side portions of the upstream edge of the attachment portion, and the third plate for pressing and fixing the separation pad therebetween. Since the leaf spring member provided with the spring portion is used, the structure of the leaf spring member is simple, the production is easy, and the mounting of parts including the separation pad is easy.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a separation sheet feeding device according to an embodiment of the present invention.

FIG. 2 is a schematic longitudinal sectional side view of a main part of the separation sheet feeding device according to the embodiment of the present invention.

FIGS. 3A and 3B show a shape of a leaf spring member used in the separation sheet feeding device according to the embodiment of the present invention, wherein FIG. 3A is a side view and FIG.
Is a bottom view.

FIG. 4 is a schematic side view of the facsimile using the separation sheet feeding device according to the embodiment of the present invention.

FIG. 5 is a schematic side view of a conventional separation sheet feeding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Original document 20 Separation paper feeder 21 Paper feed roller 22 Separation pad 23 Leaf spring member 23a Attachment part 23b First leaf spring part 23c Second leaf spring part 23d Third leaf spring part 30 Reading part 40 Printing part 50 Thermal paper A Facsimile Body B Upper cover of facsimile a, b Guide plate

Claims (3)

[Utility model registration claims] 1. A separation sheet feeder that discharges a plurality of sheets inserted between a sheet feed roller and a separation pad pressed against the sheet feed roller one by one to the downstream side by rotating the sheet feed roller. In the apparatus, a leaf spring member integrally formed with a first leaf spring portion for pressing a separation pad against a paper feed roller and a second leaf spring portion for pressing a sheet against a paper feed roller upstream of a position where the separation pad is pressed is provided. A separation sheet feeding device, comprising: 2. A leaf spring member comprising: a mounting portion for mounting the leaf spring member to an apparatus; a first leaf spring portion inclined from a downstream edge of the mounting portion and extending downstream; 2. The separation sheet feeding device according to claim 1, further comprising a second leaf spring portion inclined from an upstream edge of the attachment portion and extending downstream. 3. A pair of second leaf spring members attached to the device by fixing an attachment portion to a protrusion protruding from the device, and extending from both side portions of an upstream edge of the attachment portion. The sheet spring is pressed against the paper feed roller by the leaf spring portion, and the separation pad whose upstream end is locked by the projection is pressed and fixed by the third leaf spring portion extending from between the pair of second leaf spring portions. The separation sheet feeding device according to claim 2.