JPH0473958B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an endless belt-like reversible multiplicity of display elements, each having a writing head and an erasing head, stretched between a driving sprocket and a driven sprocket. This invention relates to a display device that is circulated by a pair of chains and displays information from both sides.

[Prior Art] Various displays of this type are known in the past, in which the display element has a magnetic pole on one side and the front and back sides are distinguishable, so that it can be held in place by a writing head equipped with an electromagnet. The information on the display is written by inverting the display elements, and after being cycled once or several times, the information is erased by the erase head and other information is written by the write head.
(For example, JP-A-58-7685, JP-A-58-9189)
(see publication).

However, the display elements are inverted due to vibrations generated when the display element group is circulated by the chain. For this purpose, for example,
Japanese Patent No. 50-14296 discloses a technique in which a holding plate is provided to prevent the display element from being reversed during movement.

In such known technology, display is performed only on one side, and therefore, a writing device is provided at one end of one side, and an erasing device is provided at the other end. In this way, in the case of a display on only one side, it is only necessary to provide a holding plate on the display part of the one side where the display element group moves in a straight line, but in the case of a double-sided display in which the display elements are displayed on both sides, the sprocket is used to hold the rotating part in a straight line. A plate must be provided, and there is a risk that the sprocket may interfere with the retaining plate. In addition, if the holding plate is placed away from the display element group, the display elements will move and become difficult to see, and if placed close to each other, the display elements may interfere with the end of the holding plate during movement, causing malfunctions. Wear occurs.

[Problems to be Solved] Therefore, it is an object of the present invention to reliably prevent the display element group from being reversed during the circular movement of the display element group, and to prevent writing and erasing without interfering with other parts. The purpose is to provide an indicator that can be easily performed.

[Means for Solving the Problems] According to the present invention, a plurality of reversible display elements in the form of an endless belt having a writing head and an erasing head are arranged by a pair of chains stretched between a driving sprocket and a driven sprocket. In a display device that displays information from both sides by circulating the
An anti-rotation band formed in the form of an endless belt of flexible material is provided inside the display element and circulates with the display element through each of the sprockets, and the anti-rotation band is arranged in plurality at the writing head and the erasing head. A reversal space for the display element is formed by being guided by the rollers.

[Explanation of effects] Therefore, when the display element group moves cyclically,
As it passes through the write head, the predetermined information is written for each column in turn, and displays the written information from both sides of the display, and as it passes through the erase head, the displayed information is The information will be deleted and new information will be displayed again. Also, the same information can be displayed multiple times if necessary.

When moving this display element group, flexible material,
For example, an anti-rotation band made of rubber or the like is provided on the back or inside of the display element and moves with the display element, so the display element does not move around and make noise and does not interfere with other parts. It never happens.

At the writing head and erasing head, the anti-rotation band forms a reversal space by means of rollers, so that the display element can be reversible at these positions in the conventional manner.

In this way, in the present invention, since the display element is held by a rotation prevention band made of flexible material that moves together with the display element, it is possible to easily form a reversal space using the rollers, and the generation of noise due to movement can be prevented. .

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

1 and 2 show an example in which the present invention is applied to a large information display device for advertising. In the drawings, reference numeral 1 denotes a group of reversible display elements in the form of an endless belt, and a drive sprocket 2 and a driven sprocket 3. A pair of chains 4 stretched between them allows for circular movement. The display element group 1 consists of a large number of display elements 5 arranged in a matrix, and the front and back sides of the display elements 5 are distinguishable, for example, a fluorescent tape 6 colored with a highly distinguishable color (red). (FIG. 3) is pasted on the front surface of the display element group 5, and the back surface is, for example, black. Further, the display element 5 is rotatably attached to a shaft 7 (FIG. 4) extending between a pair of chains 4, 4, and is supported so as to be reversible by magnetic repulsion or attraction. That is, a magnetic pole 8 (FIG. 3) having the same polarity is attached to one side of each display element 5, and a write head 11 equipped with an electromagnet that applies a magnetic force between the poles and reverses the display element 5 is driven. It is arranged at a position on the rear side of the sprocket 2 so as to correspond to the width direction of the display element group 1. Further, on the front side near the driving sprocket 2, an erasing head 13 equipped with an electromagnet is arranged so as to correspond to the width direction of the display element group 1, and it reverses the display element 5 which has been inverted by the writing head 11 in the opposite direction. It is now possible to erase the image to a plain state.

According to the present invention, a rotation prevention band 18 is provided to prevent erroneous rotation of the reversing display element 5 caused by vibration when the display element group 1 is circulated by the chain 4.

As shown in FIGS. 1 and 2, this anti-rotation band 18 is provided on the inside or back side of the display element group 1 and is adapted to move together with the display element group 1 by means of a drive sprocket 2. As shown in FIGS. This anti-rotation band 18 is made of a flexible material such as rubber and is shaped like an endless belt. and write head 11
Four rollers 20 are attached to each of the extinguishing heads 13 and 13, and sufficient space is secured to change the circulation path of the anti-rotation band 18 and invert the display element 5. Reference numeral 15 in the figure is a casing, and both sides of the casing have sprockets 2 and 3.
A transparent plate 16 made of glass or the like is placed in the center.
is attached so that the information displayed cyclically on the display element group 1 can be viewed from both directions. 1
7 is a driving sprocket 2 and a driving motor. Note that if the write head 11 is used as an erasing head, the erasing head 13 becomes unnecessary.

In operation, when the motor 17 is driven, the display elements 1 are moved in a circular manner via the drive sprocket 2. In synchronization with this, a control device (not shown) sequentially converts the shape of characters/marks as advertising information into dots from one side, outputs an inversion signal to the writing head 11, inverts the display elements 5 sequentially, and displays a group of display elements. Form characters/marks on 1. The advertisement information thus displayed is inverted at the erasing head 13 and erased into a blank state. In this way, information is sequentially and cyclically displayed in the display element group 1.

During this period, the display element 5 circulates together with the anti-rotation band 18, so that the display element 5 is not reversed due to vibration or the like during the circular display, and the display element 5 circulates while maintaining the state displayed by the writing head 11. Erroneous rotation of the display element 5 is therefore prevented. Further, since the display element 5 moves in a circular manner together with the rotation prevention band 18, it is possible to prevent the display element 5 from erroneous rotation, and also to eliminate wear of the display element 5 and peeling of the fluorescent tape due to relative movement.

[Effects of the Invention] As described above, the present invention provides the following excellent effects.

(1) An anti-rotation band made of flexible material is provided inside the display element and moves together with the display element, so the display element does not move and make noise.

Therefore, generation of noise is prevented.

(2) Since the display element does not rotate anywhere other than the writing head and erasing head, it does not interfere with other parts.

(3) No wear on display elements or peeling of fluorescent tape.

(4) Since a rotation prevention band made of flexible material is provided, a reversal space can be easily formed using rollers.

(5) Both sides can be displayed.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a display device embodying the present invention, FIG. 2 is a partial vertical sectional view of FIG.
FIG. 3 is an explanatory diagram showing details of a group of display elements in the figure. 1...Display element group, 2...Drive sprocket,
3... Driven sprocket, 4... Chain, 5...
...display element, 8...magnetic pole, 11...writing head, 13...erasing head, 18...rotation prevention band.

Claims (1)

[Claims] 1. A display that is equipped with a writing head and an erasing head, and displays information from both sides by circulating a large number of reversible display elements in the form of an endless belt by a pair of chains stretched between a driving sprocket and a driven sprocket. In the device, an anti-rotation band formed in the form of an endless belt made of a flexible material is provided inside the display element and circulates along with the display element through each of the sprockets, and the anti-rotation band is connected to the writing head and the erasing head. 1. A display device characterized in that a display element is guided by a plurality of rollers to form an inversion space.