JPS60148849A - Paper carrier - Google Patents

Abstract

PURPOSE:To take out the jammed paper without breaking, by pressing a driven roller pressure contacting with drive roller in reverse direction from the pressure contacting direction upon opening of an open/close member. CONSTITUTION:An open/close member 12 provided with feed roller and paper discharge roller 10 in a paper carrier for copier or facsimile is made rotatable around the rotary shaft 10a of drive roller such as paper discharge roller to be opened/closed freely while a pressure contact releasing member 18 such as eccentric cam lever, etc. is projected at the side of pressure contacting driven roller 11 such as a pinch roller. Upon opening of said member 12, pressure contact releasing member 18 will press the rotary shaft 11a of driven roller 11 in reverse direction from the pressure contacting direction to take out the jammed paper without damage.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a paper conveyance device used in a copying machine, a facsimile machine, or the like.

゛ Conventional configuration and its problems Paper conveyance devices used in copying machines or facsimile machines, etc.
There are a document paper transport system and a copy paper or recording paper transport system. FIG. 1 shows an example of a document paper conveyance system in a facsimile machine.

The originals 2 stacked on the original table 1 are transferred to the automatic paper feeder 3.
By the action of the separating member 4 that is in contact with the lowermost original, the originals are separated one by one from the lowermost original and fed. The fed document 2 is further conveyed while being sandwiched between a feed roller 6 and a pinch roller 6 driven by the feed roller 6. On the way, its image surface is illuminated by a light source 7, and the reflected light is reflected by an imaging lens. The light is focused on the reading element 9 by the light beam 8, and the original is read. The reading element 9 converts the inputted original information into a time-series electric signal and outputs it.The read original 2 is then transferred to a paper ejection roller 1o and a pinch roller 11 driven by pressure contact therewith. It is conveyed while being sandwiched between the two, and is discharged onto a predetermined tray.

The feed roller 6 and the paper ejection roller 10 are attached to an opening/closing member 12, and this opening/closing member 12 is attached to the paper ejection roller 1o.
It is possible to rotate around the rotation axis IQa. Therefore, if a paper jam occurs in this conveyance system, the opening/closing member 12 can be lifted around the rotating shaft 10a to expose the inside of the conveyance system. Okay, the paper that caused the paper jam, ie, original 2, can be removed. However, if the leading edge of the document 2 is already pinched between the paper ejection roller 10 and the pinch roller 11, the two will not separate even if the opening/closing member 12 is opened, making it easy to take out the document 2. cannot be done. In particular, if the document 2 is thin, wrinkles may occur in the document or the document may be torn when taken out.

In order to solve such problems, conventionally,
As shown in FIG. 2, the rotating shaft 12a' of the opening/closing member 12 is provided at a position different from the rotating shaft 10a of the paper discharge roller 1o, and when the opening/closing member 12 is opened, the feed roller 6 and the paper discharge roller 10 are Both pinch rollers 6 and 11
A device configured to be spaced apart from the vehicle has been proposed.

However, in such a device, the rotation space of the opening/closing member 12 becomes larger and the number of parts increases.
This is inconvenient in realizing miniaturization and cost reduction of the device.

OBJECTS OF THE INVENTION It is, therefore, an object of the present invention to provide an improved paper transport device which is small and inexpensive and which allows for easy removal of jammed paper without wrinkles or damage.

Structure of the Invention The paper conveying device according to the present invention is provided with a driven roller that is attached to the opening/closing member so as to be rotatable around the rotating shaft of the driving roller. A pressure release member is provided for pressing the drive roller to separate it from the drive roller.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The overall structure of the apparatus is almost the same as the conventional example shown in FIG. .10 and a pinch roller 6 driven by pressure contact therewith.
．． 11, it is read by an optical system consisting of a light source 7, a lens 8, and a reading element 9.

The driving rollers 5 and 1o are rotatably supported by the opening/closing member 12 and receive power from others, and the opening/closing member 12 is
The drive roller 10 is rotatable around a rotation axis 10a. The pinch rows 26 and 11 are connected to the fixing member 13
The drive rollers 6 are rotatably supported in elongated holes 14.16 via bearings (not shown), and are pressed by compression coil springs 16.17 provided in each elongated hole 14.16.
．． 10 and is driven by pressure contact. As shown in FIG. 4, the drive roller rotation shaft 10a of the opening/closing member 12
, protruding toward the pinch row 211 and its rotating shaft 1
1a (5) A pressure release member 18 is provided which can be suppressed in a direction opposite to the pressing direction of the spring 17.
8 may be formed integrally with the opening/closing member 12 or may be a separate member that looks into the opening/closing member 12. Further, in this embodiment, as the pressure release member 18, a lever using an eccentric cam, a cam of other shape, a lever, or the like may be used.

Next, the operation of this device will be explained. When the document 2 sent from the automatic paper feed roller 3 becomes jammed between the opening/closing member 12 and the fixing member 13, the opening/closing member 12 is lifted around the rotating shaft 10a. This results in
The drive row 26 follows the rotation of the opening/closing member 12 and moves away from the pinch roller 6, but the drive row 10
Since 0a is the center of rotation of the opening/closing member 12, its position does not change. However, as shown in FIG.
8 rotates and presses the rotating shaft 11a of the pinch roller 11 located within the stroke of the cam circle against the pressing force of the spring 17 through its bearing (not shown).
The pinch roller 11 moves away from the drive row 210 along the elongated hole 16.

Therefore, even if the jammed original 2 is caught between the drive roller 1Q and the pinch row 211 that presses against it, opening the opening/closing member 12 will separate the two, so the jammed original 2 can be removed. Can be taken out easily.

The portion of the pinch roller 11 pressed by the pressure release member 18 may be the pinch roller 11 itself, its shaft 11'a or a bearing, or a component attached to the shaft 11a. In addition, in the case of a paper conveying device in which the pinch roller 6.11 is attached to the opening/closing member 1211111 on the side of the drive a-ra 6.10 or the fixed member 13, the center of rotation of the opening/closing member 12 is similarly attached to the driving roller rotation axis 10a. In addition, a similar pressure release member 18 may be provided on the fixed member 13 side.

FIGS. 6 and 7 show an example of the configuration and its operating state in such a case. The rotating shaft 20a of the drive roller 20 is rotatably attached to the fixed member 23, and the opening/closing member 22 is rotatably attached to the rotating shaft 20a. The opening/closing member 22 is provided with an elongated hole 26 into which the shaft 21a of the pinch roller 21 is inserted via a bearing (not shown). A tension coil spring 27 is provided between the drive roller shaft 20 a and the pinch roller shaft 21 a via bearings (not shown), so that the pinch roller 21 is pressed against and driven by the drive row 220 . A pressure release member 28, which is an inclined cam, is provided near the drive roller shaft 20a of the fixed member 23. Therefore, when the opening/closing member 22 is rotated around the drive roller shaft 20& when a paper jam occurs, the releasing member 28
The pinch roller shaft 21a is pushed up along the elongated hole 25, and both rollers 20 and 21 are separated from each other.

Effects of the Invention As described above, according to the paper conveyance device of the present invention, the pressure contact between the driving roller and the driven roller can be released by simply opening the opening/closing member, so that paper jams can be avoided during conveyance. This can be easily removed without wrinkling or damaging the paper.

This invention can be applied to a conveying system for copying paper or recording paper having a similar configuration, and has similar effects.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a conventional paper conveyance device, FIG. 2 is a schematic configuration diagram of another conventional paper conveyance device, and FIG. 3 is a schematic configuration diagram of a paper conveyance device according to an embodiment of the present invention. Figures 4 and 5
The figures are enlarged views of the same main parts, and FIGS. 6 and 7 are enlarged views of main parts in other embodiments. 1...Original table, 2...Original, 3...Automatic paper feed a-ra, 4...Separation section, 5...
Drive roller, 6...Pinch roller, 7...
Light source, 8... Lens, 9... Reading element, 10...
... Drive roller, 11 ... Pinch roller, 12
...Opening/closing member, 13...Fixing member, 14.
15... Elongated hole, 16, 17... Compression coil spring, 18... Pressure release member.

Claims (1)

[Claims] a drive roller for conveying paper; a driven roller that is urged by a spring to follow the drive roller; and an opening/closing member rotatably attached to the rotation shaft of the drive roller;
A paper conveyance device comprising: a pressure release member provided near the driving roller of the opening/closing member to press the driven roller to separate it from the driving roller when the opening/closing member is opened.