JP2000159412A - Paper discharge device in large-sized printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper discharge device in a large-sized printer capable of smoothly discharging long printed matter on a sheet unfolded on a front surface floor of a printer body. SOLUTION: On a middle area in a longitudinal direction of a sheet 53, a first bag-shaped storage part 57 formed under the sheet 53 is formed by sewing the sheet 53 in a width direction. On a base end side of the sheet 53 from a width directional sewn part 55, a second storage part 66 is formed between ring-shaped entrance parts 65 formed by fixing only both ends in the width direction of a sheet part 61 making the first storage part 57 at a sheet part which is closer to the base end than the width directional sewn part 55. A first holding bar 37 is inserted in the first storage part 57, and a second holding bar 39 is inserted in the second storage part 66. Furthermore, the width directional sewn part 55 is made to be located at a just lower position on a front end side of the sheet 53 than the second holding bar 39.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper discharge device for a large-sized printer for printing on large-sized paper, particularly large-sized paper having a width of 420 mm or more.

[0002]

2. Description of the Related Art In a conventional large-sized printer, a discharge stack portion for receiving printed sheets is formed of a cloth or a basket, and is fixed to the printer. Long printed materials that cannot be received by the discharge stack unit are detached from the printer body and discharged directly onto the floor. However, if the paper is directly discharged to the floor surface, the paper may be damaged or stained. Therefore, the present applicant has configured the paper discharge stack section with a sheet whose sheet receiving surface is foldable, and operated the paper discharge switching lever to operate the sheet. Has already been filed, including a configuration in which the printed sheet is developed on the front floor of the printer body to receive printed sheets.

[0003]

In such a configuration in which the sheet is developed on the floor surface to receive a long printed material, the sheet is placed in the middle of the sheet in order to maintain a constant concave curved shape in the width direction of the sheet. It is necessary to provide a holding bar extending in the transverse direction of the fin. The holding bar is preferably provided so that a part of the sheet is sewn to form a bag shape and inserted into the bag. However, in order to form a bag-shaped storage portion for storing the holding bar, a seam is formed in the transverse direction of the sheet. Therefore, when the printed material is discharged along the sheet surface, the front end (tip ) Is caught on the seam,
There is a problem that the printed matter cannot be smoothly discharged onto the sheet.

An object of the present invention is to provide a paper discharge device in a large printer capable of smoothly discharging a long print on a sheet spread on a front floor of a printer body.

[0005]

According to a first aspect of the present invention, there is provided a paper feed unit, a printing unit, and a paper discharge stack unit. The paper feed unit passes through the printing unit. In the large-sized printer which is discharged to the discharge stack unit, the discharge stack unit guides a printed material to be discharged onto a floor and holds a sheet for holding the printed material on the floor, and a unit for holding a base end side of the sheet. And a first holding bar provided to keep the shape of the sheet in the width direction constant in an intermediate region in the longitudinal direction of the sheet, wherein the sheet is sewn in the width direction in the intermediate region in the longitudinal direction of the sheet. Thus, only the bag-shaped first storage portion formed on the lower side of the sheet, and only the width direction ends of the sheet portion constituting the first storage portion on the base end side of the sheet with respect to the width direction sewing portion. The width direction sewing part A second storage portion formed between an annular entrance portion fixedly formed on the seat portion on the base end side; the first holding bar is provided in the first storage portion; A holding bar is provided in the second storage portion, whereby the widthwise sewn portion is positioned below the second holding bar immediately below the leading end of the sheet. It is.

According to the present invention, by providing the first holding bar in the first storage section, the shape of the sheet in the width direction can be kept constant, and the second holding bar provided in the second storage section can be maintained. Due to the presence, the widthwise sewn portion is positioned immediately below the second holding bar at the front end side of the sheet, so that when the print paper is ejected, the front end of the print paper passes over the sewn portion. Progress. Therefore, the leading end of the printing paper does not catch on the sewing portion. Further, since only the widthwise ends of the sheet portion constituting the first storage portion are fixed to the sheet portion closer to the base end of the sheet than the widthwise sewn portion, the annular entrance portion is formed. There are no fixed parts such as sewn parts on the surface. Therefore, the printing paper can smoothly pass through a portion without the sewing portion or the like.

According to a second aspect of the present invention, in the sheet discharging apparatus for a large printer according to the first aspect, sheet fixing levers are provided at both ends in the width direction of the large printer. The base end has a structure that can be fixed to a part of the large-size printer, and the front end of the sheet fixing lever is connected to each end of the first holding lever as means for defining the position of the first holding bar. It is characterized by having a structure that can be stopped. According to the present invention, the first holding lever can be locked to a structural portion that can be locked to an end of the first holding bar, such as a hook formed on the distal end side of the sheet fixing lever. Further, since the base end of the sheet fixing lever can be fixed to the large printer, the positional relationship between the large printer and the first holding bar is determined via the sheet fixing lever, whereby the sheet is always stabilized in a constant slack state. Can be held.

According to a third aspect of the present invention, in the paper discharge device for a large-sized printer according to the first or second aspect, only the width direction ends of the sheet portion constituting the first storage portion are set to the width. The sewing machine is characterized in that a partial sewing is formed for fixing to a sheet portion closer to a base end of the sheet than the direction sewing portion. ADVANTAGE OF THE INVENTION According to this invention, only the width direction both ends of the sheet part which comprises a 1st storage part can be fixed to the sheet part by the side of the sheet base end rather than the width direction sewing part easily and without being conspicuous in appearance.

According to a fourth aspect of the present invention, there is provided a paper feed unit, a printing unit, and a discharge stack unit, and a large-sized sheet discharged from the paper supply unit to the discharge stack unit via the printing unit. In the printer, the discharge stack unit guides a printed material to be discharged onto a floor, holds a sheet on the floor and holds the printed material, means for holding a base end side of the sheet, and an intermediate region in a longitudinal direction of the sheet. A holding bar provided to keep the shape of the sheet in the width direction constant, the holding bar including a holding structure for sandwiching the valley-folded portion over the entire width direction of the sheet in a state where the sheet is folded in a valley. The holding bar is formed so that the entrance side of the holding structure faces the front end of the sheet in a state where the holding bar holds the valley-folded portion of the sheet under the sheet.

According to the present invention, since the entire width of the sheet is held by the holding bar, the shape of the sheet in the width direction can be kept constant, and the holding structure of the holding bar holds the sheet in a state of holding the sheet. Since the entrance side is formed so as to face the leading end side of the sheet, when the printing sheet is discharged onto the sheet, the printing sheet can smoothly advance beyond the leading end side of the holding bar.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a large-sized printer 1 to which a paper ejection device according to the present invention is applied. As shown in FIG. 1, the large printer 1 includes a paper feed unit 3, a printing unit 5, and a paper discharge stack unit 7.
It has.

The paper feed section 3 is formed so as to protrude to the rear upper portion of the large-size printer 1, and has two roll papers 8 set therein as shown in FIG. Roll paper 8
The printing paper 10 fed out of the printer is supplied to the printing unit 5.

As shown in FIG. 1, the printing unit 5 is provided with a paper feed roller 11 composed of a pair of a driving roller and a driven roller which can be retracted at a position facing the driving roller. The printing paper 10 fed from the roll paper 8 is discharged downward along the paper discharge guide 15 by the action of (1). A suction port 19 communicating with the suction fan 17 is formed in the paper discharge guide 15, and the printing paper 10 is sucked by the suction force from the suction port 19 to control the transport state. The printing unit 5 is provided with a print head 20, which can be moved by a carriage 21. The carriage 21 is also provided with a cutter (not shown) so that the printing paper 10 printed by the cutter can be cut and separated from the roll paper 8. The paper may be cut by applying another structure.

Next, a description will be given of the sheet discharge stack section 7 having the characteristic structure of the present invention. Output stack unit 7
Is a portion for receiving the printed printing paper 10, and by operating the paper ejection switching lever 25, the printing paper 10
You can switch the receiving method. That is, when the printing paper 10 fed out from the roll paper 8 and cut has a relatively short length in the feeding direction,
The paper ejection switching lever 25 is at the position shown in FIG. 1, and the cut printing paper 10 is sent to the base 29 side of the large printer 1 as shown by an arrow 27, and the short paper stack cloth 3 is
1 (hereinafter, this state is referred to as "short paper receiving mode").

When the printing paper 10 to be fed and cut from the roll paper 8 has a relatively long length in the feeding direction, as shown in FIG. 2, the discharge switching lever 25 is moved clockwise from the position shown in FIG. The printing paper 10 is sent to the front of the large-size printer 1 and received (hereinafter, this state is referred to as "long paper receiving mode").

Hereinafter, the structure of the discharge stack unit 7 having such a function will be described. The above-mentioned rotatable paper discharge switching levers 25 are disposed at both left and right ends when the large-size printer 1 is viewed from the front (left side in FIG. 1). A pivoting movement can be performed. At the tip of each paper ejection switching lever 25,
A long receiving groove 33 is formed. As shown in FIG. 1, in the short paper receiving mode, the base-side bar 35, the first holding bar 37, and the second holding bar 39 are sequentially inserted from the bottom into the receiving groove 33. Both ends are accommodated respectively. Base end bar 35
The short paper stack cloth 31 described above is held in a natural state between the and the rear bar 41 provided behind the base 29 so as to form a concave curved surface.

FIG. 1 shows the left and right sides of the printer body 43.
As shown in FIG. 7, a lever guide 45 is provided, and two stack cloth fixing levers 47 serving as sheet fixing levers are detachably held between the lever guide 45 and the columns 42 supporting the rear bar 41. . At the front end of each stack cloth fixing lever 47, as shown in FIG.
A hook 49 for defining the position of 7 is formed, and a disk 51 is attached to one rear end.

As shown in FIG. 1, the base side of the stack bar 53 for the long paper, which is a sheet for holding the printed material in the long paper receiving mode, is fixed to the base side bar 35. In this specification, the side closer to the printer main body 43 is referred to as a base end side. FIG. 2 shows a state in which the first holding bar 37 and the second holding bar 39 have been removed from the receiving groove 33 of the sheet discharge switching lever 25. As shown in FIG. 2 and FIG. 3, almost one-third of the long paper stack cloth 53 from the front end side (left side in the figure).
The sewing machine sewn portion 55 is formed over the entire width of the stack cloth 53 along the width direction of the stack cloth 53, so that a bag-shaped first storage portion 57 for receiving the first holding bar 37 is formed. . The first holding bar 37 is provided in the first storage portion 57.
By unfolding the long paper stack cloth 53 in a state in which is inserted, the concave shape in the width direction of the long paper stack cloth 53 can be stably maintained.

Further, as shown in FIG.
On the base end side of the stack cloth 53 for long paper, the cloth part 59 on the base end side and the cloth part 6 forming the first storage portion 57 are arranged.
1 are fixed to each other at both ends in the width direction of the cloth, and stitched portions 63 (only one is shown in FIG. 3) are formed. As a result, the annular entrance portions 65 are formed only at both ends in the width direction of the cloth, and portions other than both ends in the width direction of the cloth are portions where seams are not formed. The second holding bar 39 is disposed in a second storage portion 66 formed between the two annular inlet portions 65 thus formed (only one is shown in FIG. 3). Note that, instead of forming the sewing stop portion 63, both ends in the width direction of the cloth may be fixed using fixing means such as a clip or an adhesive.

Next, a description will be given of the operation when shifting from the short paper receiving mode to the long paper receiving mode and the operation in the long paper receiving mode. In the short paper receiving mode, the long paper stack cloth 53 is folded as shown in FIG. 1 and accommodated in a state of hanging from the bars 35, 37, and 39. From this state, as shown in FIG. 2, the stack cloth fixing lever 47 is detached from the rear bar 41 and slid forward (to the left in the figure), and the hook 49 at the front end of the stack cloth fixing lever 47 is placed on the floor. At this time, the rear end side of the stack cloth fixing lever 47 is disposed in a fan-shaped opening 54 in which the disk 51 is formed in the lever guide 45.

The first holding bar 37 and the second holding bar 39
Are removed from the receiving grooves 33 of the respective discharge switching levers 25,
The both ends of the first holding bar 37 are fixed to the respective stack cloth fixing levers 47.
Into the hook 49. As shown in FIGS. 3 and 4, the second holding bar 39 is disposed so as to be positioned closer to the front end of the long sheet stack cloth 53 (the left side in FIGS. 3 and 4) than the first holding bar 37. As a result, the sewing portion 55 is positioned below the second holding bar 39 just below the leading end of the long paper stack cloth 53.

After the setting of the long paper receiving mode is completed in this way, the large printer 1 is driven to print a long printed matter. The printed long printed matter is sent out by the paper feed roller 11, and advances to the long paper stack cloth 53 via the paper ejection guide 15. When the leading end of the long printed material passes near the first holding bar 37, the sewn stop portions 63 are formed only at both ends of the long paper stack cloth 53. And reaches the vicinity of the second holding bar 39. Second holding bar 39
In the vicinity, since the sewing machine sewing portion 55 is located below the second holding bar 39 in the forward direction of the printed material in the traveling direction, the leading end of the printed material climbs over the sewing machine sewing portion 55 and proceeds smoothly as it is, and the long paper Is held on the stack cloth 53.

Next, another embodiment of the present invention will be described with reference to FIGS. In the present embodiment, only the structure of the paper discharge stack unit 7 is different from the above-described embodiment, and the other parts are the same as those of the above-described embodiment. In FIG. 5, the same members as those in the above embodiment are denoted by the same reference numerals.

In FIG. 5, a holding bar 67 is provided in the middle of the long sheet stack cloth 53 in the longitudinal direction to keep the concave shape of the stack cloth 53 constant in the width direction.
As shown in FIG. 6, the holding bar 67 is used to
2 long plates 6 having a length substantially the same as the width direction length of 3
9, 71, and these long plates 69, 71
In the present embodiment, the two long plates 6 are rotatably connected on one side and act by a spring (not shown).
9, 71 are biased to be always closed. In FIG. 6, the rotation fulcrum of the two long plates 69 and 71 is denoted by reference numeral 7.
Indicated by 3. The two long plates 69 and 71 may be fastened with bolts or fixed with magnets.

An entrance portion 75 is formed on the side where the two long plates 69 and 71 can be opened (left side of the holding bar 67 in FIG. 6), and the long paper stack cloth 53 is folded in a valley. In this state, it is inserted between the two long plates 69 and 71 from the entrance portion 75, and is held by a biasing force by a spring action. Holding bar 6
Reference numeral 7 denotes a state in which the entrance portion 75 faces the front end side (the left side in FIG. 6) of the long paper stack cloth 53 in a state where the long paper stack cloth 53 is sandwiched below the long paper stack cloth 53. Are located in

In the present embodiment, since the holding bar 67 is made of a heavy material such as iron, the holding bar 67 is held at a predetermined position while holding the long paper stack cloth 53 by its own weight during the discharging operation. From moving. When the holding bar 67 is made of a relatively lightweight material, for example, a surface tape may be provided on the lower surface of the holding bar 67 and adhered to the floor surface, or, similarly to the above embodiment, from the main body side of the large printer. A member having the same function as the stack cloth fixing lever may be extended to fix the position of the holding bar 67.

In this embodiment, when the printed long printed material is fed by the paper feed roller 11 and advances on the long paper stack cloth 53, the printed material is moved to the front end side (the entrance portion) of the holding bar 67. 75 side).

[0028]

According to the embodiment shown in FIG. 3 of the present invention, by providing the first holding bar in the first accommodating portion, the shape in the width direction of the stack cloth for long paper can be kept constant. . In addition, the presence of the second holding bar provided in the second storage portion allows the widthwise sewn portion to be positioned immediately below the second holding bar at the front end side of the long paper stack cloth. When is discharged, the leading end of the printing paper advances over the widthwise sewn portion and advances. Therefore, the leading end of the printing paper does not get caught on the sewing portion in the width direction.

Further, only the both ends in the width direction of the stack cloth for long paper constituting the first storage portion are fixed to the sheet portion closer to the base end of the sheet than the sewing portion in the width direction to form the annular entrance portion. There is no sewn portion on the sheet surface between the annular entrances. Therefore, the printing paper can pass through this portion smoothly.

Further, according to the embodiment shown in FIG. 6, when the printed material advances on the long sheet stack cloth, it can smoothly advance beyond the leading end side of the holding bar.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view illustrating a state in a short paper receiving mode of a large printer according to an embodiment to which a paper discharge device according to the present invention is applied.

FIG. 2 is a side sectional view showing a state of a long paper receiving mode of a large printer according to an embodiment to which the paper discharge device of the present invention is applied.

FIG. 3 is a partial perspective view showing an embodiment of the paper discharge device of the present invention to which a first holding bar and a second holding bar are applied.

FIG. 4 is a schematic view showing a positional relationship among a first holding bar, a second holding bar, a stack cloth for long paper, and a stack cloth fixing lever.

FIG. 5 is a side sectional view showing a state of a long paper receiving mode of a large printer according to another embodiment to which the paper discharge device of the present invention is applied.

FIG. 6 is a schematic view showing a positional relationship between a holding bar and a stack of long papers according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Large printer 3 Paper feed part 5 Printing part 7 Paper discharge stack part 8 Roll paper 10 Print paper 11 Paper feed roller 20 Print head 25 Paper discharge switching lever 31 Short paper stack cloth 33 Receiving groove 37 First holding bar 39 Second Holding bar 41 Rear bar 43 Printer main body 47 Stack cloth fixing lever 49 Hook 51 Disk 53 Stack paper for long paper 55 Sewing machine sewing section 57 First storage section 59 Base side cloth section 61 Cloth constituting first storage section Portion 63 Sewing stop part 65 Annular inlet part 66 Second storage part 67 Holding bar 69, 71 Long plate 73 Long plate fulcrum 75 Inlet part

Claims (4)

[Claims] 1. A large-sized printer comprising a paper feed unit, a printing unit, and a paper discharge stack unit, wherein paper is discharged from the paper supply unit to the paper discharge stack unit via the printing unit, wherein the paper discharge stack unit is: A sheet for guiding a printed material to be discharged onto the floor and holding the printed material on the floor, means for holding the base end side of the sheet, and keeping the shape of the sheet in the width direction constant in an intermediate region in the longitudinal direction of the sheet A first holding bar provided for the sheet, and a bag-shaped first storage portion formed on the lower side of the sheet by sewing the sheet in the width direction, in a longitudinally intermediate region of the sheet; An annular shape formed by fixing only both ends in the width direction of the sheet portion constituting the first storage portion to the sheet portion closer to the base end than the width direction sewing portion on the base end side of the sheet from the direction sewing portion. Formed between the entrances A second storage portion is formed, the first holding bar is provided in the first storage portion, and the second holding bar is provided in the second storage portion, whereby the width direction sewing portion is formed in the second storage portion. A sheet discharging device for a large-sized printer, which is positioned below a holding bar immediately below the leading end of the sheet. 2. The large-size printer according to claim 1, further comprising a sheet fixing lever provided at both ends in a width direction of the large-size printer, and a structure which can be fixed to a part of the large-size printer at a base end side of the sheet fixing lever. The first side of the fixed lever is
A sheet discharging device for a large printer, comprising a structure capable of locking each end of the first holding lever as means for defining a position of a holding bar. 3. The partial sewing according to claim 1, wherein only the width direction both ends of the sheet portion constituting the first storage portion are fixed to the sheet portion closer to the base end of the sheet than the width direction sewing portion. A paper discharge device in a large-sized printer, wherein a paper discharge device is formed. 4. A large-size printer comprising a paper feed unit, a printing unit, and a paper discharge stack unit, wherein paper is discharged from the paper supply unit to the paper discharge stack unit via the print unit, wherein the paper discharge stack unit is: A sheet for guiding a printed material to be discharged onto the floor and holding the printed material on the floor, means for holding the base end side of the sheet, and keeping the shape of the sheet in the width direction constant in an intermediate region in the longitudinal direction of the sheet A holding bar provided for the holding bar, wherein the holding bar has a holding structure for holding the valley folded portion over the entire width direction of the sheet in a state where the sheet is folded in a valley, and the holding bar is provided on the lower side of the sheet. A sheet discharging device for a large-sized printer, wherein an entrance side of the holding structure is formed so as to face a leading end side of the sheet while holding a valley folded portion of the sheet.