JPH04232798A - Display unit - Google Patents

Abstract

PURPOSE:To prevent a display sheet, to be fed to the display section of a display, from jamming or crimping due to loosening and to feed the display sheet stably. CONSTITUTION:A sheet carrying path for guiding and carrying a display sheet 4 is provided between a belt 28 for carrying the display sheet 4 at the display section of a display and a printer 8 for forming an image on the display sheet 4. A sheet guiding/switching board 17, which closes to guide the display sheet 4 when the leading end of the display sheet 4 passes through the sheet carrying path whereas opens to form a space B when the leading end of the display sheet reaches the belt 28, is provided in the sheet carrying path and the display sheet is loosened in the space B.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device that forms an image on a display sheet and moves the display sheet to display the image.

0002

2. Description of the Related Art Conventionally, as a display device using a display sheet, a device in which an electrostatic toner image is formed into a belt-like endless sheet and displayed is known. The present invention is a display device that does not display an image drawn on such an endless sheet, but forms and displays an image on an edged sheet such as a rolled display sheet or a strip display sheet. The display is performed by conveying a display sheet from the back while pressing it against a transparent plate such as a glass plate using a belt.

0003

[Problems to be Solved by the Invention] In order to transport the display sheet in a display device that displays an image drawn on such an edged display sheet, it is necessary to use a sheet transport path in order to reliably transport the display sheet from the printer between the belt and the transparent plate. The leading edge of the sheet had to be guided through it while being fed out.

[0004] As display devices become larger, display sheets become larger and transportation becomes difficult. Particularly on display surfaces where the display sheet is conveyed from bottom to top along a transparent plate, there is a tendency for the belt and display sheet to slip due to the display sheet's own weight and friction with the transparent plate, resulting in a slight delay in conveyance speed. Ta.

[0005] As a result, the display sheet becomes slack in front of the belt, causing the display sheet to become jammed in the sheet conveyance path, or the display sheet to rub or wrinkle in the sheet conveyance path, resulting in smudged images. .

[0006]

[Means for Solving the Problems] In view of the above problems, the present invention provides a continuous long display sheet for smoothly conveying the display sheet, a printer for forming an image on the display sheet, and a printer for this printer. The conveyor belt includes a transparent plate installed above, a conveyor belt stretched parallel to and in contact with the transparent plate, and a sheet conveyance path that guides and conveys the display sheet from the printer to the conveyor belt. In display devices that display images by rotating the display sheet and moving the display sheet along a transparent plate, when the leading edge of the display sheet passes through the sheet conveyance path, it closes to guide the display sheet, and when the leading edge of the display sheet reaches the belt, This is a display device in which a sheet guide switching plate that opens to form a space is provided in a sheet conveyance path.

[0007]

[Operation] According to this, the display sheet conveyed between the belt and the transparent plate slips due to the friction between the display sheet and the transparent plate and the display sheet's own weight, causing a slight delay in conveyance speed, causing the display to be displayed. Even if the sheet sags in front of the belt, it will fit into the open space of the sheet guide switching plate, so it will not get jammed or wrinkled in the sheet conveyance path.

[0008]

[Embodiment] An embodiment of the present invention will be explained with reference to the drawings. Figure 1
2 is an enlarged side sectional view of the display device, FIG. 2 is an enlarged side sectional view of the display device, and FIG. 3 is an enlarged side sectional view of the display device after paper is conveyed.

The display device 1 is composed of a printer section 2 and a display section 3. The printer unit 2 includes a roll of paper 4, a paper feed roller 5 and a roller 6 that feed the paper 4, a cutter 7, and an inkjet printer 8 that prints color images. There is. Although paper is used as an example of the display sheet,
It may be a film or cloth, and its shape may also be cut. Further, the printer is not limited to the inkjet type.

The paper feed roller 5 is rotated by a motor 9,
The roller 6 is rotatably supported by an opening/closing lever 10, and when the opening/closing lever 10 is closed, the roller 6 comes into contact with the paper feed roller 5, and a microswitch 11 is activated.

Color image data sent to the printer 8 is sent from an external computer (not shown).

Roller 12, roller 13, roller 14, roller 15, paper guide plate 16, paper guide switching plate 17, roller 18a
, 18b and the paper guide plates 19a, 19b form a paper conveyance path to the display section 3.

A paper sensor 20 is provided in front of the roller 12 and the roller 13. The roller 12 is driven by a motor 21, and the roller 14 is driven by a motor (not shown). Further, the paper guide switching plate 17 is opened by the motor 22, thereby creating a space B in the paper transport path, and a paper stocker 22 is provided beyond this space B.

Among the rollers 18a and 18b, the upper roller 18a is driven by a motor 24, and the lower roller 18a is driven by a motor 24.
b activates the solenoid 25, and is provided so as to be movable toward and away from the upper roller 18a. This roller 18
A paper sensor 26 is provided in front of a and 18b.

The display section 3 includes a large glass plate 27.
It has an A0 size display area of 1188 mm in length and 840 mm in width, and is provided above the printer section 2. Also provided are a belt support roller 29 for stretching the belt 28 along the glass plate 27, a belt drive roller 30, a roller 31 paired with the belt drive roller 30, and a paper sensor 32. This belt 28 is a flexible sheet whose surface is covered with a rubber material.

The belt drive roller 30 is driven by a belt drive motor 33 through a plurality of gear groups, so that the belt 2
8 along the glass surface from bottom to top (in the direction of arrow A in Figure 2)
move it to

On the back side of the display section 3, there is a first winding roller 34 for winding up the paper after displaying, and a second winding roller 34 for rewinding the paper 4 that has been wound up by the first winding roller 34. A roller 35 is provided.

Next, the operation of the embodiment of the present invention will be explained step by step. First, when the leading edge of the paper roll 4 is carried between the paper feed roller 5 and the roller 6 and the opening/closing lever 10 is closed, the microswitch 11 is turned on. The motor 9 starts, the paper feed roller 5 rotates, and paper is automatically fed.

When the paper sensor 20 detects the fed paper 4, the motor 21 is activated and the roller 12 rotates, and the roller 14 similarly rotates to convey the paper 4.

[0020] When the paper 4 starts to be fed, the paper guide switching plate 17 is closed, and the paper 4 is guided toward the rollers 18a and 18b. At this time, the solenoid 25 is actuated by the signal from the paper sensor mentioned above, and the lower roller 18b is lifted and brought into contact with the upper roller 18a.

When the paper sensor 26 detects the paper 4 passing between the paper guide plate 16 and the paper guide switching plate 17, the motor 24 is started, the upper roller 18a rotates, and the paper 4 is conveyed to the display section 3. be done.

When the paper sensor 32 detects the paper 4 conveyed to the display section 3, the belt drive motor 34 is driven and the belt 28 begins to rotate. And paper guide switching board 1
7 opens. Next, as the paper 4 is conveyed between the belt 28 and the roller 31, the solenoid 25 and the motor 24 are turned off, the lower roller 18b and the upper roller 18a are separated, the roller 18a stops, and the rollers 18a, 18b The drive by

Therefore, the paper 4 is conveyed along the glass plate 27 by the movement of the belt 28, but here the belt and the paper 4
This will cause slippage between the paper and paper, resulting in a slight delay in paper conveyance speed.

[0024] Therefore, the paper 4 is
However, the paper guide switching plate 1
7 is open, the image will not swell up in this space B, get stuck in the sheet conveyance path, or be rubbed or wrinkled in the sheet conveyance path, thereby preventing the image from becoming dirty.

If the paper guide switching plate 17 is provided at a curved part of the paper conveyance path as in this embodiment, the paper 4 will definitely swell from this curved part, so that the effect can be reliably obtained. .

After that, the paper 4 conveyed by the belt 28
is wound around the paper winding roller 34, and at this point the display device 1 is in a state where it can display an image, and image formation and display are executed in accordance with signals from an external computer (not shown).

Next, another embodiment of the present invention will be described with reference to the drawings. FIG. 4 is an enlarged side sectional view of a display device in another embodiment.

36 has already drawn an image, and the roller 3
7 is driven by a motor (not shown), and this roller 37
A roller 38 is provided in pair with the roller 38, and a paper guide plate 41 for guiding the paper 36 between a glass plate 39 and a belt 40 and a paper guide switching plate 42 are provided above the roller. In the figure, 43 is a belt drive roller.

In this embodiment, the paper 36 is guided directly between the belt 40 and the glass plate 39, and the paper guide switching plate 42 is closed until the paper 36 reaches the belt 40 (as indicated by the dotted line in the figure). (shown) guides the paper 36 and opens it as the paper 36 reaches the belt.

[0030]

Effects of the Invention According to the present invention, a sheet guide switching plate is provided in the sheet conveyance path to reliably feed a display sheet with an end from the printer between the belt and the transparent plate, and the belt is prevented from slipping between the belt and the display sheet. It is possible to prevent the display sheet from clogging in the sheet conveyance path due to the display sheet sagging in front of the screen, and to prevent image stains due to the display sheet being rubbed or wrinkled within the sheet conveyance path.

[Brief explanation of the drawing]

[Figure 1] Enlarged side sectional view of a display device

[Figure 2] Side sectional view of the display device

[Figure 3] Enlarged side view of the display device after paper is conveyed

FIG. 4: An enlarged side sectional view of a display device in another embodiment.

[Explanation of symbols]

1 Display device 4,36 paper 8 Printer 14, 37 Roller 15,38 Koro 16 41 Paper guide board 17, 42 Paper guide switching board 22 Motor 27, 39 Glass plate 28, 40 belt

Claims (2)

[Claims] Claim 1: A continuous long display sheet, a printer that forms an image on the display sheet, a transparent plate installed above the printer, and a display sheet stretched parallel to and in contact with the transparent plate. A display device comprising a conveyor belt and a sheet conveyance path for guiding and conveying a display sheet from a printer to the conveyor belt, and displays an image by rotating the conveyor belt and moving the display sheet along a transparent plate, A display characterized in that a sheet guide switching plate is provided in the sheet conveyance path, which closes to guide the display sheet when the leading edge of the display sheet passes through the sheet conveyance path, and opens to form a space when the leading edge of the display sheet reaches the belt. Device. 2. The display device according to claim 1, wherein the sheet guide switching plate according to claim 1 is provided at a curved portion of the sheet conveyance path.