JPH09240889A - Paper carrying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To replace a roll paper for a short time and save a replacement manhour, even when plural roll papers are mounted compactly and a size or paper quality is different. SOLUTION: This device is the paper carrying device of an image forming device 1 for mounting at least two roll papers 5, 6 for a paper sheet for image forming individually and forming a paper carrying passage which can carry them. An openable/closable roll paper mounting cover 7 for mounting the roll paper 5 is formed and an openable/closable other roll paper mounting cover 8 for mounting the other roll paper 6 is formed thereunderneath. The paper carrying passage is formed between a roll paper mounting cover 7 and other roll paper mounting cover 8 and also the upper surface of the roll paper mounting cover 7 is used for a sheet paper arranging stand for arranging and inserting the sheet paper to the sheet paper insertion port for image forming.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus, and more particularly to a paper conveying apparatus in a large size image forming apparatus.

[0002]

2. Description of the Related Art Conventionally, when a roll paper is used in a large-sized image forming apparatus, different paper sizes and different paper qualities are often used. In such a case, the roll paper is used by replacing it with the required paper. However, since the roll paper itself is heavy, when loading it,
There are problems that the roll paper is accidentally dropped, or the roll paper is damaged by contact with a part of the device or the like. Further, even if the roll paper is mounted, it has to be manually switched when switching to a required size or a required paper quality.

[0003]

However, a plurality of roll papers can be mounted and one roll paper can be selectively conveyed, and further, the sheet paper can be conveyed in the vicinity of the mounting of the plurality of roll papers. In order to exist, it is necessary to arrange roll paper compactly. Therefore, the sheet paper transport rollers for transporting the sheet paper, the roll paper transport rollers for transporting the roll paper, and the paper transport guides for guiding to the image forming unit should be arranged closely in consideration of the paper transportability. Was needed.

In order to solve the above-mentioned problems, an object of the present invention is to install a plurality of roll papers compactly, and even if the size or paper quality is different, the roll papers are exchanged instantaneously, which saves labor for replacement. An object of the present invention is to provide a paper transport device that can be realized.

[0005]

In order to achieve the above object, the present invention provides at least two types of image forming sheets.
A paper transporting device of an image forming apparatus for forming a paper transporting path capable of individually loading individual rolls of paper and forming a paper transporting path, wherein an openable roll paper loading cover is formed on one of the loaded rolls of paper. , Another roll paper mounting cover that is openable and closable is formed on the other roll paper mounted below the roll paper mounting cover, and the paper transport path is provided between the roll paper mounting cover and the other roll paper mounting cover. In addition to forming the sheet, the sheet conveying device is characterized in that an upper surface of the roll sheet mounting cover is used as a sheet aligning table for aligning and inserting the sheet into an image forming sheet insertion slot.

According to one embodiment of the present invention, each of the plurality of paper transport paths is provided with a switching mechanism that stops the transport of the other paper transport path when any one of the paper transport paths is used.

According to another embodiment of the present invention, the plurality of paper transport paths is provided with a roll paper holding mechanism that holds the transport of the roll paper of the other paper transport path when any one of the paper transport paths functions. Set up.

According to still another embodiment of the present invention, the plurality of paper conveying paths are composed of upper and lower two guide plates integrally mounted with upper and lower two conveying rollers.

As a result, a plurality of roll papers can be compactly mounted, the roll papers can be instantly replaced even if the sizes or the paper qualities are different, and the labor required for replacement is saved.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 4 is a schematic block diagram of an ink jet type large format color image forming apparatus embodying the present invention. In the figure, a color plotter (hereinafter referred to as a plotter) 1, which is an ink jet type large format color image forming apparatus, is fixedly installed on a stand 2. A large-sized sheet (cut sheet) inserted in the arrow direction A from the sheet insertion port 4 by input and operation of the operation unit 3 is conveyed into the plotter 1, printed as a color image, and discharged.

FIG. 5 is a block diagram showing the essential parts of the image forming apparatus shown in FIG. In the figure, the paper transport device of the plotter 1 is loaded with two roll papers, a first roll paper 5 and a second roll paper 6,
First roll paper cover 7 and second roll paper cover 8 respectively
Housed within. On the upper surface of the first roll paper cover 7,
Arrange a large-sized cut sheet (not shown) to move in the direction of arrow A.
Insert The large-sized cut sheet is conveyed between the second roll sheet cover 8 and the upper guide 9 according to the rotation of the driving roller 10 while being sandwiched between the sheet conveying rollers 11a and 11b which are in contact with the driving roller 10.

Further, a large-sized cut sheet is placed on the printing plate 12 or temporarily stopped, and color printing is performed during the stop. After color printing, the print width is further conveyed.
The above printing process is repeated.

For printing, a plurality of print heads mounted on a head holder 14 of the head carriage 13, for example,
This is performed by the cyan, magenta, yellow, and black print heads 15. The head carriage 13 reciprocates for the printing process in the arrow direction B according to the specific signal. A specific print signal is sent to each print head 15 during movement, and ink is ejected from the print head 15 to perform a printing process.

The reciprocating movement of the head carriage 13 is such that the head carriage 13 is fixed to a part of a belt 16 hung on a driving source (not shown), and the reciprocating movement of the driving source causes the belt 16 to reciprocate to move the head. Carriage 13
Is performed by moving back and forth.

By this reciprocating movement, the plurality of print heads 15 in the head carriage 13 scan the large-sized paper on the printing plate 12 in accordance with the print signal, and ink is ejected from each print head to print. The process is performed to form a color image on a large size paper. When the printing process is completed, the paper is conveyed by the printing width and the next printing process is repeated. After that, the large-sized paper is ejected while being sandwiched between the ejection roller 17 and the spur 18 above it.

FIG. 1 is a schematic block diagram of a conveying device for accommodating two rolls of paper, which is an embodiment of the present invention. In the figure, the paper transporting device of the plotter 1 is loaded with two first roll papers 5 and second roll papers 6. The first roll paper cover 7 of the first roll paper 5 rotates around the first cover shaft 19 of the mounting frame 7a and can be opened and closed. First
When loading the roll paper 5, the first roll paper cover 7
Is opened and mounted on a first roll paper holder (not shown), and the first roll paper cover 7 is closed.

Similarly, the second roll paper cover 8 can be opened and closed by rotating around the second cover shaft 20 of the mounting frame 8a. When mounting the second roll paper 6, the first roll paper cover 7 is opened, the second roll paper cover 8 is further opened, and the second roll paper cover 8 is mounted on a second roll paper holder (not shown). To close.

On the second roll paper cover 8, first transport rollers 21 and 2 which are in contact with each other and transport the first roll paper 5.
2 is installed and rotationally driven by the motor 25 (FIG. 2). Above the first transport roller 21, the first transport guide 2
3 is fixed to the tip of the second roll paper cover 8. The first transport roller 21 projects from the lower surface of the paper transport auxiliary guide 24 and is always in contact with the first transport roller 22 to transport the first transport roll paper 5.

Therefore, the first transport rollers 21 and 22 are surrounded by the paper transport auxiliary guide 24 and the second roll paper cover 8 from above and below, and form a transport path through which the first roll paper 5 is transported. The first roll paper 5 can be conveyed by a specific signal while being sandwiched by the first conveyance rollers 21 and 22. At the same time, the upper surfaces of the first roll paper cover 7 and the first transport guide 23 are a cut sheet aligning table that aligns large format cut sheets and inserts them into the sheet insertion port 4.

FIG. 2 is a schematic explanatory view of the drive system shown in FIG. In the figure, the motor 25 is fixed to a plotter body (not shown). The motor gear 26 is fixed to the motor 25, meshes with the clutch gear 27, and the clutch gear 29 is rotated by the operation of the clutch 28 fixed to the plotter body. The roller gear 30 rotates.

By activating or deactivating the clutch 28 according to a specific signal, the first conveying rollers 21, 22
The first roll paper 5 can be conveyed or stopped because the paper roll rotates or stops. Also, the second roll paper cover 8
In the closed state, the first transport roller gear 30 and the clutch gear 29 mesh with each other, and the first roll paper 5 is in the transport state,
In the open state of the second roll paper cover 8, the first transport roller gear 30 and the clutch gear 29 are separated from each other and are in a stopped state.

Therefore, by providing a mechanism for opening / closing the second roll paper cover 8, the opening / closing operation mechanism has a roll paper transport function for transporting any one of the paper transport paths,
At the same time, it has a roll paper conveyance holding function for holding conveyance of another paper conveyance path.

Although the case where the clutch 28 is used has been described above, the motor 25 may be controlled by a specific signal. Further, in the present embodiment, the motor 25 is installed to convey the first roll paper 5, but it is also possible to use the drive source of the plotter body via a clutch or the like.

FIG. 3 is a schematic block diagram of an image forming apparatus equipped with three rolls of paper according to another embodiment of the present invention.
In the figure, the image forming apparatus (plotter) 1 includes three first roll papers 5, a second roll paper 6 and a third roll paper 3
1 and are installed. The first roll paper 5 is installed by opening the first roll paper cover 7, and the second roll paper 6 is installed by opening the first roll paper cover 7 and the second roll paper cover 8.
In addition, the third roll paper 31 includes the first roll paper cover 7 and the second roll paper 31.
The roll paper cover 8 and the third roll paper cover 32 are opened and mounted.

The first roll paper 5 is conveyed while being sandwiched between the first conveyance roller 21 and the first conveyance roller 22 installed on the second roll paper cover 8. It is possible to align cut sheets and convey the cut sheets into the image forming apparatus by the second conveyance guide installed on the second roll paper cover 8. A second paper feed auxiliary guide 34 is installed at the bottom. Second roll paper 6
Are nipped and conveyed by the second conveyance rollers 35 and 36 rotatably installed on the third roll paper cover 32. Therefore, the cut sheets can be aligned and conveyed into the plotter 1 with respect to the N roll papers by the N-1 conveyance guides installed on the N-1 roll paper covers.

The present invention is not limited to the above embodiment, but can be implemented in other embodiments by making appropriate design changes.

[0028]

As is apparent from the above description, the paper transporting device of the present invention forms a paper transporting path capable of individually mounting at least two rolls of paper for image formation and transporting them. A paper transporting device of an image forming apparatus, in which an openable / closable roll paper mounting cover for mounting one of the roll papers is formed, and another roll paper is mounted below the roll paper mounting cover for opening / closing. Another roll paper mounting cover is formed, the paper transport path is formed between the roll paper mounting cover and another roll paper mounting cover, and the upper surface of the roll paper mounting cover is used as an image forming sheet paper insertion port. By using a sheet paper alignment table for aligning and inserting sheet paper, the problems of the prior art can be easily solved, multiple roll papers can be compactly mounted, and roll papers of different sizes or paper qualities can be installed. Conversion is performed in a short time, the effect of such replacement labor is labor saving.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a conveying device that accommodates two roll sheets according to an embodiment of the present invention.

FIG. 2 is a schematic explanatory diagram of a drive system in FIG.

FIG. 3 is a schematic configuration diagram of an image forming apparatus equipped with three roll sheets according to another embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of an ink jet type large format color image forming apparatus in which the present invention is implemented.

5 is a configuration diagram of a main part of the image forming apparatus in FIG.

[Explanation of symbols]

 1 Plotter 5 1st Roll Paper 6 2nd Roll Paper 7 1st Roll Paper Cover 8 2nd Roll Paper Cover 10 Drive Roller 15 Printhead 19 1st Cover Shaft 20 2nd Cover Shaft 21 and 22 1st Conveying Roller 23 1st Conveyance guide 24 Paper conveyance auxiliary guide 31 Third roll paper 32 Third roll paper cover 33 Second conveyance guide

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryoma Suzuki 6-3-3 Shimorenjaku, Mitaka City, Tokyo Copier Co., Ltd. (72) Inventor Kazuhiro Murakami 6-3-3 Shimorenjaku, Mitaka City, Tokyo Copier Co., Ltd. (72) Inventor Gonsuke Inomata 6-3-3 Shimorenjaku, Mitaka City, Tokyo Copier Co., Ltd. (72) Inventor Naoki Kiyohara 6-3-3 Shimorenjaku, Mitaka City, Tokyo Copier Co., Ltd. Inside (72) Inventor Seiichi Seiichi 6-3-3 Shimorenjaku, Mitaka City, Tokyo Inside Copier Co., Ltd.

Claims (4)

[Claims] 1. At least two image forming sheets
A paper transporting device of an image forming apparatus for forming a paper transporting path capable of individually loading individual rolls of paper and forming a paper transporting path, wherein an openable roll paper loading cover is formed on one of the loaded rolls of paper. , Another roll paper mounting cover that is openable and closable is formed on the other roll paper mounted below the roll paper mounting cover, and the paper transport path is provided between the roll paper mounting cover and the other roll paper mounting cover. A sheet conveying device, which is formed and uses the upper surface of the roll sheet mounting cover as a sheet sheet aligning table for aligning and inserting the sheet sheet into an image forming sheet sheet insertion port. 2. The paper transport path according to claim 1,
A paper transporting device, comprising a switching mechanism for stopping the transport of another paper transporting path when any one of the paper transporting paths is used. 3. The paper conveying path according to claim 2,
A paper transporting device comprising a roll paper holding mechanism for holding the transport of roll paper on another paper transport path when any one of the paper transport paths functions. 4. The paper transporting device according to claim 1, wherein the plurality of paper transporting paths are composed of upper and lower two guide plates integrally mounted with upper and lower two transporting rollers.