JPH04266341A - Sheet material carrier device - Google Patents

Abstract

PURPOSE:To provide a sheet material carrier device for ensuring the discrimination of a plurality of sheet materials such as manuscripts set on a device one by one, and for carrying them to a rear process part at fixed sending velocity. CONSTITUTION:In a sheet material carrier device 1 for discriminating and carrying a sheet material one by one by a sending roller 2 and by a discriminating pad 3 arranged in opposition to the sending roller, the feeding roller 2 and a rotational shaft 20 are used in common, while high hardness elastic material rollers 6L, 6R of the same roller diameter are provided, and loose rotational rollers 7L, 7R that come into contact with the high hardness elastic material rollers 6L, 6R, are provided on the stream side lower than the discriminating pad 3.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyance device for a sheet-like object such as a document used, for example, in a reading section of a facsimile machine.

0002

2. Description of the Related Art Generally, in a facsimile machine, when a reading unit reads a plurality of documents to be sent to a recipient, it is necessary to transport the documents at a constant speed and read each document in an orderly manner. FIG. 3 is a side view showing a conventional example of a paper feeding device that conveys a document to a reading section of a facsimile machine.

The paper feeding device 100 includes a document feed roller 101, a document separation pad 102 disposed opposite to the document feed roller 101, and a retainer spring 103 for applying an appropriate pressing force necessary for document separation to the separation pad 102. ,As needed,
It is comprised of a jack 104 for adjusting the pressing force of the retainer spring 103. Next, the broken line P in the figure indicates the pass line of the document, and the document is moved to the document feed roller 1.
After a plurality of sheets are set on the document mounting stand 105, which is located near the top of 01 and diagonally to the right, the paper feeder 1
00, the documents are conveyed downward while being sorted one by one, and pass through the document reading position 106. During this time, the reading optical system 107
The contents of the original are read by the extractor 10, and then the extractor 10
8 and a press roller 109 that rolls into contact with the discharge roller 110, the paper is discharged outside the machine (in the direction of arrow A).

[0004] In the reading optical system 107, the surface of the document passing through the document reading position 106 is illuminated with a light source such as a fluorescent lamp, and image information expressed as characters, figures, etc. is captured as reflected light, and this is converted into a CCD image. Bright and dark 2 depending on the sensor
The image data to be transmitted is obtained by photoelectrically converting it into a value image signal. The obtained image signal is then sent to the other party through the transmission section of the facsimile machine.

[0005]

[Problems to be Solved by the Invention] Incidentally, the document feed roller 101 and separation pad 102 used in the paper feeding device 100 are usually made of rubber or resin material in order to have an appropriate coefficient of friction necessary for document feeding. be done. In particular, for the document feed roller 101, a sponge roller is often used so that the roller itself has elasticity and improves its fit with the document so that the document can be separated and conveyed smoothly. Therefore, in the paper feeding device 100,
The document separation pad 102 is pressed by the retainer spring 103 against the roller surface of the document feed roller 101, and only the lowest document among the plurality of documents set on the document tray 105 is transferred to the document feed roller 101. 1
The document is separated and conveyed by the frictional force between the rotational driving force from 01 and the document.

In order to further improve the document separation performance, it is possible to press the retainer spring 103 with the jack 104 and increase the pressing force of the document separation pad 102 against the document feed roller 101. Since the document feed roller 101 is formed of a sponge roller, it is inevitable that the roller body will be deformed and its outer diameter will change when the document separation pad 102 is pressed. Therefore, the feeding speed of the document changes, and when the document reaches the discharge roller 110, running resistance occurs, causing a problem that the document slips on the discharge roller 110 portion. If the document is not conveyed smoothly in this manner, it will greatly impede the document reading operation in the reading section.

[0007]Furthermore, since the rotational driving force is applied only to the portion of the conveyed document that is in rolling contact with the document feed roller 101, a waving phenomenon may occur in the width direction of the document. In such a case, the reading operation of the document will be greatly hindered. The present invention has been made in order to solve this problem, and it is possible to reliably separate a plurality of set sheet-like materials such as originals one by one, and to transport them to the rear processing section at a constant feed speed. The object of the present invention is to provide a sheet-like object conveying device that is possible.

[0008]

[Means for Solving the Problems] The present invention provides a sheet-like material conveying device that separates and conveys sheet-like materials one by one using a feed roller and a separation pad arranged opposite to the feed roller. The present invention is characterized in that high-hardness elastic rollers having a common shaft and the same roller diameter are provided, and an idling roller that rolls into contact with the high-hardness elastic roller is provided downstream from the separation pad.

[0009]

[Operation] According to the above structure, a high-hardness elastic roller having a common rotation axis and the same roller diameter as the feed roller is provided, and the high-hardness elastic roller has free rotation at a downstream position of the separation pad. The rollers are brought into contact. Under such conditions, the set plural sheets are stopped by the separation pad pressed by the feed roller, and at the same time,
Only the lowermost sheet-like body in contact with the feed roller is applied with the rotational driving force and frictional force of the feed roller, and is separated and conveyed to the downstream side of the separation pad.

[0010] The separated sheet-like body is continuously gripped by the high-hardness elastic roller and the idle roller that is in rolling contact with the roller, and the rotational driving force of the feed roller is transmitted to the sheet-like body through its rolling contact surface. be done. Here, since the high-hardness elastic roller has high hardness, there is little change in its surface shape even when the idle roller is in rolling contact. Moreover, since the rotation axis of the high-hardness elastic roller is common to that of the feed roller, its rotation speed is the same as that of the feed roller. Therefore, each high-hardness elastic roller rotates at a stable and constant roller circumferential speed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A sheet conveying apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an embodiment in which a sheet conveying device 1 according to the present invention is applied to a reading section of a facsimile machine. Moreover, FIG. 2 is an X direction arrow view showing the main part of the sheet-like object conveying device 1 in FIG.

This sheet conveying device 1 includes a feed roller (hereinafter referred to as a separate roller) 2 formed as a sponge roller, a separation pad 3 disposed opposite to the feed roller 2, and a retainer for pressing the separation pad 3. spring 4
and the jack 5, and high-hardness elastic rubber rollers 6R and 6L, which have a common rotating shaft 20 with the separate roller 2 and are provided one each at positions outside of both ends of the separate roller 2.
and an idling roller 7R that is rolled into contact with the roller surfaces of these two high-hardness elastic rubber rollers 6R and 6L at a position near the downstream side of the separation pad 3 by springs 70R and 70L,
It consists of 7L. In addition, the broken line in the figure shows the conveyance line P of the sheet-like object which advances in the direction of the arrow A.

According to the sheet conveying device 1 having the above structure, the plurality of sheets set on the mounting stand 8 provided diagonally above and to the right of the separate roller 2 are moved by the retainer spring 4 and the jack 5. Only the separation pad 3 pressed by the separation roller 2 and the sheet-like body located at the bottom thereof are conveyed downstream by the separation roller 2. The separated sheet is then held by two high-hardness elastic rubber rollers 6R and 6L and idle rollers 7R and 7L that are in rolling contact with these rollers, and is fed out toward the reading section at a constant speed. . Note that the sheet-like material that has been fed out passes through a reading position 10 of the reading optical system 9, and after its image content is read, it is ejected out of the machine by an ejection roller 11.

Note that the idle rollers 7R and 7L are connected to the rotating shaft 71.
It has a configuration of parallel rollers having a common axis, and roller positioning means (not shown) having springs 70R and 70L are provided at both ends thereof, and a high hardness elastic rubber roller 6R
, 6L, its position is adjusted so that it contacts with a suitable pressure. Regarding the materials of the separate roller 2 and the high hardness elastic rubber rollers 6R and 6L, the friction coefficient of the separate roller 2 is μ1, and the high hardness elastic rubber roller 6R
, 6L, a rubber material is selected such that μ2 is slightly larger than μ1.

[0015] By doing the above, the separate roller 2
Since it is a sponge roller, it cannot avoid some deformation due to the pressure of the separation pad, but since the two high hardness elastic rubber rollers located on both sides have high hardness,
High hardness elastic rubber roller 6R that hardly deforms.
6L has a stable circumferential speed. Furthermore, since the friction coefficients of the high-hardness elastic rubber rollers 6R and 6L are slightly larger than that of the separate roller 2, the sheet-like body separated by the separate roller 2 and the separation pad 3 has priority over the separate roller 2. The high-hardness elastic rubber rollers 6R and 6L apply rotational driving force to the material, and the material is transported to the rear processing section at a constant speed.

[0016] In the above embodiment, an example was shown in which two high-hardness elastic rubber rollers were provided, but the number is not particularly limited to two, and a plurality of rollers may be provided. In this case, since the rotational driving force is more dispersed, it is effective to prevent the waving phenomenon that tends to occur in the width direction of the sheet-like body.

[0017]

[Effects of the Invention] According to the above-described sheet conveyance device according to the present invention, the sheet bodies separated one by one by the separation pad and the feed roller are reliably conveyed to the rear processing section at a stable and constant speed. becomes possible. In addition, for the conveyed sheet, the rotational driving force is not concentratedly applied only to the rolling contact portion of the feed roller as in the conventional example, and the high hardness elastic roller and the idle roller rotate. Since it is dispersed in the contact areas, it is possible to prevent the waving phenomenon that tends to occur in sheet-like objects.

Therefore, when the sheet conveyance device according to the present invention is applied to the reading section of a facsimile machine, it is possible to stably convey a sheet such as a document without interfering with the reading operation by the reading optical system. It will become a reality.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment in which a sheet conveying device according to the present invention is applied to a reading section of a facsimile machine.

FIG. 2 is an X-direction arrow view showing essential parts of the sheet-like object conveying device in FIG. 1;

FIG. 3 is a side view showing a conventional example of a paper feeding device that conveys a document to a reading section of a facsimile machine.

[Explanation of symbols]

1 Sheet material conveyance device 2 Separation roller 3 Separation pads 6R, 6L High hardness elastic rollers 7R, 7L
Idle roller 20 rotating shaft

Claims (1)

[Claims] 1. A sheet-like material conveyance device that separates and conveys sheet-like materials one by one using a feed roller and a separation pad arranged opposite to the feed roller, wherein the feed roller and the rotation shaft are common and the same rollers are used. 1. A sheet-like material conveying device, characterized in that a high-hardness elastic roller having a diameter is provided, and an idling roller that rolls into contact with the high-hardness elastic roller downstream of the separation pad.