JPH0374065B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Technical Field of the Invention> The present invention relates to a highly practical drum scanner device in which a document sheet used for image input can be easily and accurately mounted on a rotating drum.

<Prior art and its problems> Drum scanner devices are widely used as devices for inputting image information drawn on manuscript paper. This drum scanner device scans the screen by sequentially reading image information from one end using an optical sensor while rotating a manuscript sheet wound around a rotating drum of the main body by the rotation of the drum. , thereby performing image input. However, it is relatively difficult to mount the document paper onto the rotating drum, and image distortion due to misalignment is likely to occur. That is, conventionally, the document paper has been attached to the rotating drum by pasting it with adhesive tape or by sandwiching the document paper between a sheet film provided on the rotating drum. There is. For this reason, accurate positioning was extremely difficult. Moreover, in severe cases, the manuscript paper was often damaged. In other words, it has been difficult to simply and accurately mount the original paper onto the rotating drum.

<Object of the Invention> The present invention has been made in consideration of the above circumstances, and its object is to provide an easy-to-handle method that allows manuscript paper to be easily and accurately mounted on a rotating drum. An object of the present invention is to provide a highly practical drum scanner device.

<Structure of the Invention> In the present invention, one end and both sides of a translucent sheet film, one end of which is fixed to a rotating drum, are bent toward the rotating drum to form a locking portion, and a document can be secured at this locking portion. The paper is positioned and held in a sheet film, and the sheet film holding the original paper is wound around a rotating drum and fixed.

<Effects of the Invention> Therefore, according to the configuration of the present invention, accurate positioning is achieved by storing the manuscript paper in a sheet film, and then the sheet film is attached and fixed to a rotating drum, which is a simple operation. This operation allows the manuscript paper to be correctly mounted on the rotating drum. Moreover, the above-mentioned positioning can be performed simply and accurately using the locking pieces provided on the sheet film. Therefore, it is possible to provide a highly practical drum scanner device that does not cause the problems of the prior art and is easy to handle.

Further, the document paper is held by a locking portion formed by bending the sheet film, and the document paper and the sheet film come into contact only at the locking portion.
Therefore, the contact area between the document paper and the sheet film is small, and the frictional resistance when inserting the sheet film is small, so that the insertion operation is easy. Furthermore, since it is not necessary to make the gap between the locking portions (bent portions) of the sheet film unnecessarily large in order to reduce the frictional resistance, there is less possibility that the document paper will fall off from the sheet film.

<Embodiment of the Invention> An embodiment of the invention will be described below with reference to the drawings.

The figure shows the schematic configuration of the embodiment device.
The figure is a schematic diagram showing the state in which the manuscript paper 2 is attached to the rotating drum 1, FIG. 2 is a diagram showing the relationship between the rotating drum 1 and the translucent sheet film 3, and FIG. 3 is a diagram showing the structure of the back side of the sheet film 3. FIG. 4 is a diagram showing a cross-sectional configuration of an end portion of the sheet film 3.

Although not particularly shown in the drawings, the drum scanner device scans the image information of a rotating drum 1 which is its main body, a rotational drive mechanism of this rotating drum 1, and a document paper 2 attached to the rotating rotating drum 1, that is, rotates the drum scanner device. It is composed of an optical sensor that scans and reads the drum 1 in the axial direction, and an image processing section that processes the read image signal.

The translucent sheet film 3 is made of mylar film or the like, which is slightly shorter than the circumferential length of the rotating drum 1 and has a width comparable to the width of the drum 1. One end and both sides of the sheet film 3 are bent to form a predetermined gap, such as through a spacer 5, as shown in FIG. The original paper 2 is housed and held in a state in which the original paper 2 is brought into contact with the spacer 5 and its position is regulated. One end of the sheet film 3 is fixed to the circumferential surface of the rotary drum 1 along its axial direction, and the sheet film 3 is wound around the circumferential surface of the rotary drum 1 with this fixed end as a reference. It's summery. The sheet film 3 is wound in such a way that the spacer 5 and the locking portion consisting of the bent end are placed inside, and the manuscript paper 2 held therebetween is sandwiched between the circumferential surface of the rotary drum 1.

On the other hand, a hook piece 7 is provided on the other end side of the sheet film 3 via a plurality of tension springs 6. This hook piece 7 has a groove 7a in its center, and has a structure in which a pin 8 inserted into the groove 7a is locked. The pin 8 is connected to the rotating drum 1.
When the sheet film 3 is wound around the rotating drum 1 and the hook piece 7 is pulled against the spring 6, the hook piece 7 is positioned so as to engage with the groove 7a. Positioned.

According to the device configured in this way,
The document paper 2 to be used for image input is fitted into the locking portion of the sheet film 3, the position is regulated and held, and the sheet film 3 is wound around the rotating drum 1 and the other end is fixed. paper 2
will be correctly mounted on the rotating drum 1.
Furthermore, by simply positioning and mounting the original paper 2 on the sheet film 3, it is possible to correctly position and mount the document paper 2 on the rotating drum 1 as well. Also, positioning with respect to the sheet film 3,
This can be done simply and accurately by simply bringing the edge of the original paper 2 into contact with the locking portion of the sheet film 3.
Therefore, it is easy to handle, and it is possible to mount the original paper 2 very easily and accurately, and to input images correctly. Therefore, its practical advantages are very large. Further, since the sheet film 3 receives a tensile force from the spring 6 at the fixed portion at the other end, the manuscript paper 2 sandwiched between the sheet film 3 and the rotating drum 1 is positioned extremely stably and reliably. maintained in the state. Therefore, rotating drum 1
There is no risk of misalignment due to rotation. Further, unlike the conventional method, there is no problem such as the possibility of damage to the original paper 2, and the present invention has a high practical advantage.

Note that the present invention is not limited only to the above embodiments. For example, the size of the sheet film 3 may be determined according to the specifications of the rotating drum 1. Further, the shape of the edge forming the locking portion of the sheet film 3 is not particularly limited. In short, the present invention can be implemented with various modifications without departing from the gist thereof.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, and FIG. 1 is a diagram showing a state in which manuscript paper is mounted on a rotating drum;
FIG. 2 is a diagram showing the relationship between the rotating drum and the sheet film, FIG. 3 is a diagram showing the structure of the back surface of the sheet film, and FIG. 4 is a diagram showing the cross-sectional structure of the end portion of the sheet film. DESCRIPTION OF SYMBOLS 1...Rotating drum, 2...Manuscript paper, 3...Sheet film, 5...Spacer, 6...Spring, 7...Hook piece, 7a...Groove, 8...Pin.

Claims (1)

[Scope of Claims] 1. In a drum scanner that scans and reads image information on a document sheet mounted on a rotating drum using an optical sensor, one end portion is fixed on the rotating drum along the axial direction of the rotating drum, A translucent sheet film having locking parts bent toward the rotating drum at one end and both sides, and a fixing member for removably fixing the other end of the sheet film onto the rotating drum. A drum scanner device characterized in that the document sheet is held while regulating its position by the locking portion of the sheet film.