JPH0749338B2 - Paper feeder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device that separates and sends stacked sheets or cards.

2. Description of the Related Art Conventionally, a cassette case is provided at the bottom of the main body containing the printing unit, and a U-shaped curving sheet feeding path is provided to convey the voucher pulled out from the front edge of the cassette case to the rear printing unit. There is one in which a feed roller is provided in this single-cut sheet conveyance path.

Problems to be Solved by the Invention However, since the single-piece sheet of the cassette case at the bottom of the main body is curved, cards such as postcards having a strong rigidity are bent. Although there is a handset provided on the front face of the main body, the work of inserting the postcards one by one from the handset is extremely troublesome.

Means for Solving Problems A first cassette case, which is located at the bottom and accommodates a large number of cut sheets in a stacked state, and an upper part near the front edge of the first cassette case A sheet feeding roller located at a position, a printing section, and a single-sheet feeding path from the front edge of the first cassette case to the printing section on the rear side through a curved surface facing the front upper part once, A guide surface that faces an extended surface that extends forward from the latter half of the curved surface after the curved surface, supports a strong card in a stacked state, a paper feed roller that contacts the card in the lowermost layer, In the front part of the main body, there is provided a second cassette case having a pressing body that comes into contact with the upper-layer cards and a gate that opposes the guide surface with a gap corresponding to approximately one card of the cards. Attach it to the second cassette case in front of the single-cut transport path. A curved guide surface facing the curved surface is integrally formed with a predetermined gap.

As a result, the single sheet in the first cassette case is pulled out by the paper feed roller and is conveyed to the printing section from the single sheet feeding path for printing.However, when printing on cards such as postcards, the front side of the main unit A second cassette case is attached to the card, the cards placed on the guide surface are pressed by the pressing body toward the guide surface, and the cards are sequentially conveyed from the bottom layer by the paper feed roller to the inside of the main body. Send to the latter part of the road. As a result, even cards with strong stiffness can be continuously and efficiently fed without a curling tendency.

In addition, by forming the curved guide surface integrally with the second cassette case, the cut sheet in the first cassette case can be
It can be sent out between the single-cut conveying path inside the main body and the curved guide surface of the second cassette case.

Further, by forming the manual feed guide surface on the upper surface of the second cassette case, it is possible to feed other cut sheets from the manual feed guide surface even with the second cassette case attached to the main body. .

Embodiment An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, a printing unit 2 is provided inside a main body 1 of the printing machine. The printing unit 2 scans a rotating photosensitive member 3, a charging charger 4 for forming a charging layer on the outer periphery of the photosensitive member 3, and a charging layer formed by the charging member 4 with a laser beam to form an electrostatic latent image. An exposure unit 5 to be formed, a developing unit 6 for developing the electrostatic latent image, and a developed image sent from the first cassette case 7 by a paper feed roller 8 and feed rollers 9, 10, 11. It is composed of a transfer charger (13) for transferring onto a sheet (12) and a fixing roller (14) for fixing the cut sheet (12) after transfer. In addition, inside the main body 1, there is provided a single-cut sheet conveying path 16 from the front edge of the cassette case 7 to the front printing upper portion and then to the rear printing unit 2 through the curved surface 15.

In addition, a manual cover 17 that is selectively attached to the front surface of the main body 1.
And a second cassette case 18 are provided. As shown in FIG. 2, the manual cover 17 has a curved surface of the single-cut sheet conveying path 16.
Curved guide surfaces 19 facing each other with a predetermined gap formed in 15 are provided, and a pinch roller 20 that elastically contacts the feed roller 9 is rotatably mounted. Also, FIG. 1 and FIG.
As shown in FIGS. 4 and 5, the second cassette case 15 is formed with a curved guide surface 21 that conveys the cut sheet 12 between the curved surface 15 of the cut sheet conveying path 16 and the curved guide surface 21. Locking projections 22 are formed on both sides of the leading end of the lock 21 so as to be detachably engaged with locking holes (not shown) formed on both sides of the single-cut sheet conveying path 16. A plurality of openings 23 are arranged in the left-right direction on the curved guide surface 21, and a pinch roller 24 contacting the feed roller 9 is rotatably provided inwardly of the openings 23 by being biased in one direction by a plate spring 25. Has been. The manual cover 17 also has locking projections 22 on both sides, and the mounting structure for the main body 1 is similar to that of the second cassette case 18.

The second cassette case 18 is formed with swelling guide surfaces 27, 28 for supporting postcards 26 as cards, and feeds the postcards 26 in contact with the lowermost postcard 26 on the guide surface 27, 28 side. A roller 29 is rotatably provided. A pair of left and right eccentric cams 31 and a gear 32 are fixed to a shaft portion 30 of the paper feed roller 29, and a motor 34 for driving a gear 33 meshed with the gear 32 is driven.
Is attached to the second cassette case 18. The second cassette case 18 has a pair of left and right swing arms 36 that rotatably holds both ends of the push-up roller 35 and contacts the eccentric cam 31, and a weight 37 that presses the uppermost postcard 26. A pressing body 38 is provided. Both sides of the opening / closing cover 39 that opens and closes the upper space of the postcard 26 are rotatably held by pins 40 that are erected from both side surfaces of the protruding portion 45 protruding from the guide surface 27, and both ends of the pressing body 38 are It is rotatably held in a hole 41 formed in the opening / closing cover 39.

Further, as shown in FIG. 8, the second cassette case 18
Has fixed covers 42 located on both sides of the opening / closing cover 39,
Postcards are provided on the upper surfaces of the opening / closing cover 39 and the fixed cover 42.
A manual guide surface 43 is formed to guide other cut sheets having a width of 26 or more. Further, the stopper 44 is fixed to the opening / closing cover 39 with a gap corresponding to the thickness of one postcard 26 being provided between the opening cover 39 and the guide surface 27.

Then, as shown in FIG. 5, a gate 46 having a gap slightly larger than the thickness of one postcard 26 is formed at the lower end of the projecting portion 45 projecting from both sides of the guide surface 27. The support piece 48 that rotatably supports the pin 47 protruding from the end of the swing arm 36 and the support piece 49 that rotatably supports the shaft portion 30 of the paper feed roller 29 are the second cassette. It is formed integrally with the case 18.

Further, as shown in FIG. 6, a container 51 is formed by fitting and joining two divided containers 50 formed of a cushioning material to the motor 34, and a container 51 is formed on a part of the outer peripheral surface of the container 51. A tightening tool 52 is provided for contact. A shaft 53 projecting laterally is integrally formed at one end of the tightening tool 52, and two elastically bendable tongues 54 are integrally arranged side by side at the other end. . And, on the bottom surface of the cassette case 18, a recess 55 for fitting the bottom portion of the container 51 in a stable state, and a shaft
A bearing portion 56 that rotatably supports the 53 is integrally formed with a locking claw 58 having an inclined surface 57 at the tip like an arrow.
Further, as shown in FIG. 7, the second cassette case 18
On the bottom of the PC board 59 connected to the motor 34, and this PC board
The connector 60 that connects 59 to an external circuit is fixed.

In such a structure, the single-cut sheet 12 of the first cassette case 7 is pulled out by the paper feed roller 8 and is fed by the feed rollers 9, 10, 1.
1 supplies the image to the photoconductor 3 for printing.

When printing on another cut sheet, as shown in FIG.
The manual slip cover 17 is attached to the front surface of the single slip, and the single slips are supplied one by one from the upper surface of the manual slip cover 17 to the middle portion of the single slip conveying path 16.

When printing on the postcard 26, as shown in FIG. 1, a second cassette case 18 is attached to the front surface of the main body 1 instead of the manual cover 17. Then, the paper is fed by rotating the paper feed roller 29 by the motor 34. That is, the bottom postcard 26
Is fed to the left by the paper feed roller 29 under the pressure of the weight 37. At this time, only the lowermost postcard 26 passes through the lower portion of the stopper 44 and the gate 46 and is sent to the main body 1. Also,
The paper feed roller 29 makes one rotation to feed one postcard 26 and then stops, but the cam 31 has a hypert in the latter half rotation from the time when the tip of the postcard 26 reaches the feed roller 10 in the main body 1. And push up the swing arm 36. As a result, the push-up roller 35 pushes up the postcard 26 and separates it from the paper feed roller 29, and the subsequent operation of sending the postcard 26 is performed by the feed roller 1 on the main body 1 side.
It is left to 0, 11.

As described above, the postcard 26 is fed straight from the front surface of the main body 1 even if the postcard is strong, so that it does not have a curling habit and is continuously and efficiently fed.

When the postcard 26 is replenished in the second cassette case 18, the opening / closing cover 39 is opened upward with the pin 40 as a fulcrum, as shown in FIG. At this time, the pressing body 38 is an opening / closing cover.
Since it follows 39 and is suspended in the hole 41 over the vertical plane,
The postcard 26 guides the guide surface 27, 28 without being interrupted by the weight 37.
Can be stacked in.

Also, on the upper surface of the second cassette case 18, a manual guide surface 43
Since the sheet is formed, it is possible to feed other single sheets wider than the postcard 26 to the main body 1 by the manual guide surface 43 one by one. In addition, the manual cover 17 and the second cassette case 18
Has curved guide surfaces 20 and 21, so that the single-cut sheet 12 in the first cassette case 7 is smoothly curved and the printing unit 2
Can be guided to.

EFFECTS OF THE INVENTION Since the present invention is configured as described above, the single-cut sheet in the first cassette case is pulled out by the paper feed roller and is conveyed to the printing section from the single-cut sheet conveyance path for printing, but the second cassette case is used. When printing on cards such as postcards inside, it is possible to feed continuously and efficiently without creating a curl habit, and by forming a curved guide surface integrally on the second cassette case. , The single-cut sheet in the first cassette case can be sent out between the single-cut sheet conveying path inside the main body and the curved guide surface of the second cassette case, and further, the upper surface of the second cassette case can be manually fed. By forming the guide surface, it is possible to feed other cut sheets from the manual guide surface even with the second cassette case attached to the main body.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a vertical sectional side view showing a state in which a second cassette case is attached to a main body in a reduced scale, and FIG. 2 is a state in which a manual cover is attached to the main body. FIG. 3 is a vertical cross-sectional side view showing the second cassette case in a reduced scale, FIG. 4 is a vertical cross-sectional side view showing the state in which the opening / closing cover is open, and FIG. FIG. 6 is an exploded perspective view showing a supporting structure of rollers and the like, FIG. 6 is an exploded perspective view showing a supporting structure of a motor for the second cassette case, FIG. 7 is a plan view showing the inside of the second cassette case, and FIG. FIG. 3 is a perspective view showing a reduced appearance of a second cassette case. 1 ... Main body, 2 ... Printing section, 7 ... First cassette case, 8 ... Feeding roller, 12 ... Single sheet, 15 ... Curved surface, 16
…… Single-cut transport path, 18 …… Second cassette case, 21 ……
Curved guide surface, 26 …… postcards (cards), 27,28 …… guide surface, 29 …… paper feed roller, 38 …… pressing body, 39 …… opening / closing cover, 43 …… manual guide surface, 46… …Gate

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location B65H 3/44 J 8712-3F 310 8712-3F 3/68 8712-3F

Claims (5)

[Claims] 1. A first cassette case located at the bottom of a main body of a printing machine for accommodating a large number of cut sheets in a stacked state, and an upper part near the front edge of the first cassette case. A paper feed roller, a printing section, and a single-cut sheet conveyance path from the front edge of the first cassette case to the printing section on the rear side through a curved surface facing the front upper part are provided. A guide surface that supports a strong card in a stacked state facing an extension surface that extends forward from the latter half of the curved surface, a paper feed roller that contacts the lowermost card, and the uppermost layer. A second cassette case having a pressing body that comes into contact with the cards and a gate that faces the guide surface with a gap of about one card of the cards facing each other is attached to the front portion of the main body, In the second cassette case, with respect to the curved surface of the single-cut sheet conveying path, Paper feeding apparatus being characterized in that integrally formed curved guide surface facing with a predetermined gap. 2. A main body of a printing machine, a first cassette case located at the bottom and accommodating a large number of single-cut sheets in a stacked state, and a first cassette case located above the front edge of the first cassette case. A paper feed roller, a printing section, and a single-cut sheet conveyance path from the front edge of the first cassette case to the printing section on the rear side through a curved surface facing the front upper part are provided. A guide surface that supports a strong card in a stacked state facing an extension surface that extends forward from the latter half of the curved surface, a paper feed roller that contacts the lowermost card, and the uppermost layer. A second cassette case having a pressing body that comes into contact with the cards and a gate that faces the guide surface with a gap of about one card of the cards facing each other is attached to the front portion of the main body, In the second cassette case, with respect to the curved surface of the single-cut sheet conveying path, Integrally forming a curved guide surface facing with a predetermined gap, the sheet feeding apparatus characterized in that a closing cover for opening and closing the upper space of the cards, the second cassette case. 3. An opening / closing cover is attached to the second cassette case so as to be vertically rotatable, and an end portion of a pressing body is vertically rotatably connected to a free end of the opening / closing cover. The sheet feeding device according to claim 2. 4. A first cassette case, which is located at the bottom and accommodates a plurality of cut sheets in a stacked state, in a main body of a printing machine, and an upper part near the front edge of the first cassette case. A paper feed roller, a printing section, and a single-cut sheet conveyance path from the front edge of the first cassette case to the printing section on the rear side through a curved surface facing the front upper part are provided. A guide surface that supports a strong card in a stacked state facing an extension surface that extends forward from the latter half of the curved surface, a paper feed roller that contacts the lowermost card, and the uppermost layer. A second cassette case having a pressing body that comes into contact with the cards and a gate that faces the guide surface with a gap of about one card of the cards facing each other is attached to the front portion of the main body, In the second cassette case, with respect to the curved surface of the single-cut sheet conveying path, Integrally forming a curved guide surface facing with a predetermined gap, the sheet feeding apparatus characterized by forming the manual guide surface on the upper surface of the second cassette case. 5. The sheet feeding device according to claim 4, wherein the width of the manual guide surface is made wider than the width of the cards.