JP3064178B2 - Printing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus such as a facsimile machine.

[0002]

2. Description of the Related Art Conventionally, for example, a facsimile apparatus shown in FIG. 4 is known. The facsimile apparatus includes a lower housing 1 and an upper housing 2 stacked on the lower housing 1.
And On the upper surface of the upper housing 2, a flat base portion 3 made of a sheet metal or the like is provided, and a developing portion 4 and a fixing portion 5 are attached to the base portion 3, so that the electrophotographic printing method is performed. The device is configured. The base portion 3 has a pair of side frames 6 and 7.
A transmission section 8 for reading a transmission original is mounted between the side frames 6 and 7. Further, a plurality of transport guide members 11 and 12
Are attached to form a recording paper path through which the recording paper is conveyed. Further, a paper cassette 13 for stacking and storing recording paper is mounted on the lower housing 1 in a detachable manner. Then, the recording paper separated and fed one by one from the paper feed cassette 13 is conveyed through a recording paper path, toner is adhered in the developing unit 4, and the toner is heated and fixed in the fixing unit 5. Has become.

[0003]

However, in the above-described conventional configuration, in addition to the base portion 3 of the upper housing 2 to which the developing unit 4 and the fixing unit 5 are mounted, a pair of side frames 6 to which the transmitting unit 8 is mounted are provided. 7 and the lower housing 1 to which the paper cassette 13 is mounted are required. Further, it is necessary to attach a plurality of transport guides 11 and 12 constituting a recording paper path to the upper housing 2. Therefore, there are problems such as an increase in the number of parts, an increase in manufacturing cost, and an increase in the size of the device.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a printing apparatus capable of reducing the number of parts and the manufacturing cost.

[0005]

According to a first aspect of the present invention, there is provided a printing apparatus comprising: a printing unit for printing on paper; a base on which the printing unit is mounted; and a paper feeding unit for supplying the paper. A conveyance path on which paper is conveyed from the paper supply unit to the printing unit is provided on the base, and a paper path on which the printed paper is stacked and held.
A ray part is provided integrally.

According to a second aspect of the present invention, there is provided a printing apparatus, comprising: a printing unit for printing on paper; a base on which the printing unit is mounted; and a paper feed cassette for supplying the paper. Cassette mount for detachable paper cassette
And a tray section on which the printed paper is stacked and held
Are those provided integrally with the door.

[0007]

In the printing apparatus according to the first aspect of the present invention, a transport path on which paper is transported from a paper supply unit to a printing unit is provided on a base on which a printing unit for performing printing on paper is mounted, and Lamination
Because a tray portion to be retained is provided integrally, is reduced components constituting the conveying path, the number of components is reduced bets
In addition, the space required for installation is reduced .

[0008] claimed in the printing apparatus in claim 2, the base fitted with a printing unit for printing on paper, a cassette mounting portion for mounting the paper feed cassette detachably before printing is performed
Since the tray section on which the recording paper is stacked and held is provided integrally, there is no need to provide a separate cassette mounting section for mounting the paper feed cassette in addition to the base, and the number of parts is reduced.
In both cases, the space required for installation is reduced .

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a printing apparatus according to an embodiment of the present invention.

In FIG. 2, reference numeral 21 denotes a facsimile apparatus as a printing apparatus. The facsimile apparatus 21 has a base 22 as a base and a case 23 as an outer shell that covers the base 22. An operation panel 24 is provided on the upper surface of the case body 23, and an inclined document table 25 on the rear side of the operation panel 24 for setting a transmission document is provided. Also, this case body 23
On one side, a receiver (not shown) is placed. The printing unit 2 constituting a printing unit is provided on the base 22.
6. A facsimile machine 21 is configured by attaching a fixing unit 27, a transmission unit 28, and the like, which also form a printing unit.

As shown in FIGS. 1 to 3, the base 22 has a substantially rectangular plate-like substrate 31 formed thereon, and a pair of leg portions projecting from the lower surface of the substrate 31. 32 and a reversing guide 33 provided at the rear end of the substrate portion 31 are integrally formed of synthetic resin or the like. And, on the substrate portion 31 of the base 22, a large number of projections for mounting components,
Through holes or screw holes are formed integrally.

On the lower surface of the substrate portion 31, a cassette mounting portion 35 is formed between the leg portions 32 on both sides, and a cassette insertion portion provided on the front surface of the cassette mounting portion 35 is formed. A paper feed cassette 37 as a paper feed unit is inserted and removed from the opening 36. Also, this paper cassette 37
Has a substantially rectangular frame-shaped cassette body 38 formed of a synthetic resin or the like, and records a plurality of sheets on a push-up plate 41 made of a metal plate or the like provided inside the cassette body 38. Paper P is stacked and stored. The push-up plate 41 has a front side pivotally supported so as to be swingable, and a rear side urged upward by a spring body 42 wound conically. Furthermore, this paper cassette 37
A pair of paper holders 44 on both sides formed by bending a metal plate are provided in the vicinity of the rear end of the paper holder 44. A claw portion 45 formed at the front end of the paper holder 44 is stacked on the push-up plate 41. The corners on both sides of the stored recording paper P are locked. Opposite rails (not shown) are formed on the inner surface of the leg portion 32 so as to slidably engage and guide the paper cassette 37 so that the paper cassette 37 can be easily attached and detached. It has become.

A recording paper feed port 51 is provided at the rear of the cassette mounting portion 35 of the base 22, and a recording paper discharge port 52 is formed at the front of the case body 23. And the recording paper discharge port 51
After making a U-turn through 52, the recording paper passes through the insides of the developing unit 26 and the fixing unit 27.
53 are formed.

A feed roller 55 is rotatably supported by a first bearing hole 54 formed in a side plate 33a on both sides of the reversing guide 33, which is located in front of the recording paper feed port 51 of the base 22. The recording paper P on the push-up plate 41 urged upward is pressed against the feeding roller 55. Then, by rotating the feeding roller 55, the recording paper P locked by the claw portion 45 of the paper feed cassette 37 is released by one.
The sheets are separated one by one and fed out from a recording paper feeding port 51 to a recording paper path 53.

Further, a drawing roller 57 is rotatably supported by a second bearing hole 56 formed in the side plate 33a at a rear side of the recording paper feeding port 51. By rotating and driving, the fed recording paper P is drawn into the recording paper path 53.

The recording paper P drawn into the recording paper path 53 by the pull-in roller 57 is fed into a reversing guide 33 formed on the base 22 and a transport guide 61 attached to the rear side of the reversing guide 33. Then, the sheet is inverted so as to make a U-turn through the conveyance path 63 formed between the recording medium and the recording medium, and is conveyed to the recording paper path 53 on the upper surface of the base 22.

A printing unit (developing unit) 26 and a fixing unit 27 are mounted on the upper surface of the substrate portion 31 of the base 22 along the recording paper path 53 from the rear side to the front side. A transmission unit 28 for reading a transmission original is directly mounted above the paper path 53.

The printing unit 26 is constructed by combining an electrophotographic photosensitive drum unit 71, an electrophotographic developing unit 72, an optical system unit 73, etc. between frames 26a on both sides. And this printing unit 26
Then, an electric charge is applied to the outer peripheral surface of the photosensitive drum 75 of the electrophotographic photosensitive drum unit 71, and an electrostatic latent image of a recording pattern is formed on the outer peripheral surface of the photosensitive drum 75 by a laser beam irradiated from the optical system unit 73. The toner is supplied from the developing roller 76 of the developing unit 72 and adheres to the electrostatic latent image on the photosensitive drum 75. Further, the transfer unit 77 transfers the toner image adhered to the photosensitive drum 75 onto the recording paper P conveyed through the recording paper path 53.

Subsequently, in the fixing unit 27, the recording paper P on which the toner is applied is passed between heated rollers 79, 79 to fix the toner on the recording paper P. It is configured to be discharged to the discharge port 52 side.

Further, a tray portion 81 is integrally formed on the upper surface of the substrate portion 31 of the base 22 and is located below the transmission unit 28. The recording paper P on which printing has been performed is It is configured to be held (stacked) on the portion 81.

In the transmitting unit 28, a document insertion portion 82 opened on the upper surface is provided continuously with the document table 25, and a document discharge port 83 is formed on the front surface of the case body 23 to be opened. I have. A document path 84 for transporting the transmission document is provided from the document insertion section 82 to the document discharge port 83. Along the document path 84, a drawing roller 85 for separating and pulling out the transmission document one by one, a document path A plurality of pairs of transport rollers 86 for transporting the transmission original in 84, a reading unit 88 for reading the transmission original, and a white roller 89 for pressing the original against the reading unit 88 are arranged.

On the other hand, a first rib portion 91 extends from one side of the substrate portion 31 of the base 22, and a mounting portion 92 for mounting the handset is formed above the first rib portion 91. ing. In addition, a unit-shaped power supply unit 94 is mounted using a space surrounded by a lower side of the first rib 91 and an outer side of the leg 32 on one side. A second rib 96 extends from the other side of the base 31 of the base 22.
A unit-shaped high-voltage power supply unit 97 is attached by utilizing a space surrounded by the lower side of the lower leg and the outside of the leg portion 32 on the other side.

As described above, according to the present embodiment, the base 22
In addition, a reversing guide 33 forming a conveyance path 63 of the recording paper P, a tray portion 81 for stacking and storing the printed recording paper P, and the like are integrally formed. The printing unit 26, the fixing unit 27, the transmission unit 28, the power supply unit 94, the high-voltage power supply unit 97, etc., which are unitized, are directly mounted, and the cassette mounting unit 35 for mounting the paper cassette 37 is also integrated. Since it is incorporated, the number of parts can be significantly reduced, and the manufacturing cost can be reduced.

Further, a cassette mounting portion 35 is integrally formed on the lower surface side of the substrate portion 31 of the base 22, and a sheet feeding cassette 37 is mounted. A power supply 94 and a high-voltage power supply 97 And a printing unit 26, a fixing unit 27, a transmission unit 28, and the like are mounted horizontally on the upper surface side of the substrate portion 31 of the base 22, and the recording paper P
Are transported from the paper feed cassette 37 so as to make a U-turn. Therefore, the size of the base to which each part is mounted occupies the entire product can be reduced, and the printing unit 26 and the paper feed cassette 37 are arranged close to each other, so that the facsimile machine 21
Can be reduced in size and thickness.

Further, since each component is attached to one component called the base 22, it is possible to easily perform product inspection and the like.

Also, located below the transmitting unit 28,
Since the tray 81 is formed integrally on the upper surface of the substrate 31 of the base 22 and the recording paper P printed on the tray 81 is laminated and held, the space required for installing the facsimile machine 21 is reduced. can do.

In the above embodiment, the facsimile apparatus 21 has been described. However, the present invention can be applied to office equipment such as a page printer and a copying machine.

[0028]

According to the printing apparatus of the first aspect, the transport path on which the paper is transported from the paper feeding section to the printing section and the printing are performed on the base on which the printing section for performing printing on the paper is mounted. Said
Because provided integrally with the tray portion which sheets are stacked and held, reduces the components constituting the conveying path, to reduce the number of parts, it is possible to reduce the manufacturing cost, set
The space required for installation can be reduced .

According to the printing apparatus of the second aspect, a cassette mounting section for detachably mounting a paper feed cassette on a base on which a printing section for printing on paper is mounted , and printing is performed.
In addition, since the paper tray and the tray portion on which the paper is stacked and held are integrally provided, there is no need to provide a separate cassette mounting portion for mounting a paper feed cassette in addition to the base, thereby reducing the number of parts and reducing the manufacturing cost. Installation can be reduced
The space required to do so can be reduced .

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a printing apparatus according to the present invention.

FIG. 2 is a sectional view of the printing apparatus.

FIG. 3 is a sectional view of a part of the printing apparatus.

FIG. 4 is an exploded perspective view showing a conventional printing apparatus.

[Explanation of symbols]

21 Facsimile machine as a printing device 22 Base as a base 26 Printing unit constituting a printing unit 27 Fixing unit constituting a printing unit 35 Cassette mounting unit 37 Paper feeding cassette as a paper feeding unit 63 Transport path 81 Tray unit P Paper Recording paper as

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B41J 13/00 B65H 1/00-3/68 B65H 5/36-5/38 B65H 31/00

Claims (2)

(57) [Claims] 1. A printing unit for printing on paper, a base on which the printing unit is mounted, and a paper feeding unit for supplying the paper, wherein the base includes a printing unit from the paper feeding unit to the printing unit. A conveyance path through which the paper is conveyed, and the printed paper is stacked and held.
And a tray unit integrally provided with the tray unit . 2. A printing unit for printing on paper, a base on which the printing unit is mounted, and a paper feed cassette for supplying the paper, wherein the paper feed cassette is detachably mounted on the base. The cassette mounting part to be mounted and the printed paper are stacked and held
And a tray unit integrally provided.