JPH0517043A - Paper sheet transfer device - Google Patents

Abstract

PURPOSE:To press and contact a pressing member to a rotary roller supported at a specific position in parallel and uniformly therewith. CONSTITUTION:A rotary roller 2 is supported rotatably with a chassis 4. A pair of springs 8 apply press/contact force to both ends in a longitudinal direction of a pressing member 5, so that the pressing member 5 is pressed and contacted to the rotary roller 2. A pair of grooves 24 which support both ends of the pressing member 5 movably in the pressing direction on the press/contact center P1 of the rotary roller 2 and a stopper 27 which contacts with the pressing member 5 nearly at the middle in the longitudinal direction, thereby pressing and contacting the pressing member 5 to the rotary roller 2 in parallel are disposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper conveying device which is most suitable for application to a document reading device or a writing device such as a scanner or a printer.

[0002]

2. Description of the Related Art Conventionally, in a document reading device or a writing device such as a scanner or a printer, a rotary roller, a line sensor (a large number of reading elements arranged in a line), and a line head (arranged in a line). The original is read and written while the paper such as the original is sandwiched between the sheet and the plate-like pressure-bonding member in which the line elements such as a large number of writing elements are embedded and conveyed. At this time, since it is necessary to apply positional accuracy between the rotary roller and the pressure-bonding member and to apply a uniform pressure-bonding force, the following paper conveying device has been adopted.

That is, in the paper conveying apparatus shown in FIGS. 7 and 8, both ends 3a of the horizontal rotation roller 2 of the roller shaft 3 in the left-right longitudinal direction are rotatably attached to the chassis 4. A line element 5a such as a line sensor or a line head is horizontally embedded in the front surface of the plate-shaped crimping member 5. Then, the crimping member 5 is attached to the crimping member mounting plate 6, and the lower end of the crimping member mounting plate 6 is mounted on the chassis 4 by a horizontal fulcrum shaft 7 so as to be rotatable in the directions of arrows a and b.
Then, the crimping member mounting plate 6 is rotationally biased in the arrow a direction by the crimping means 8 which is a pair of tension springs mounted between the chassis 4 and both ends of the crimping member mounting plate 6 in the left-right longitudinal direction. The pressure bonding member 5 is pressure bonded to the rotary roller 2. Then, the rotary roller 2 is rotationally driven in the direction of arrow c by a motor (not shown), and the paper 9 such as an original is fed while being guided by the paper feed guide 10 and is fed between the rotary roller 2 and the pressure-bonding member 5. Insert this paper 9 from the direction of arrow d.
Is conveyed in the direction of arrow e by the rotating force of the rotating roller 2. Then, the line element 5a of the pressure bonding member 5 is used to read or write the paper 9.

Further, in the paper conveying apparatus shown in FIG. 8, the pressure-bonding member 5 is fixed to the chassis 4, and both ends 3a of the roller shaft 3 of the rotating roller 2 are provided in the chassis 4 as a pair of left and right guide grooves 11.
Is attached so as to be movable in the directions of arrows f and g. Then, the rotary roller 2 is urged to move in the arrow f direction by the pressure-bonding member 8 which is a pair of tension springs mounted between the both ends 3 a of the roller shaft 3 and the chassis 4, and the rotary roller 2 is pressed onto the pressure-bonding member 5. It is designed to be crimped.

[0005]

In this type of paper conveying apparatus, the element center P2 of the line element 5a of the pressure-bonding member 5 must be parallel and evenly pressure-bonded onto the pressure-bonding center P1 of the rotary roller 2 in order to reduce the paper pressure. 9 is likely to be sent obliquely to the rotary roller 2, and reading or writing of the paper 9 by the line element 5a is likely to occur.

However, in the conventional paper conveying apparatus shown in FIGS. 7 and 8, the parallelism between the rotating roller 2 and the pressure-bonding member 5 is deviated due to the deviation of the mounting accuracy of the roller shaft 3 and the fulcrum shaft 7 to the chassis 4. As a result, twisting, height deviation and the like occur, and the element center P2 of the line element 5a cannot be pressed in parallel and evenly with the pressing center P1 of the rotary roller 2. Therefore, it is necessary to remarkably improve the processing accuracy and the mounting accuracy of each component, and at the time of mounting, it is necessary to perform a troublesome position adjustment work, which causes a problem of high cost.

Further, in the conventional paper conveying apparatus shown in FIG. 9,
The mounting accuracy of the rotary roller 2 is mainly determined by the accuracy of the pair of guide grooves 11, and the accuracy of other parts and the position adjustment at the time of mounting are unnecessary. However, since the rotary roller 2 is movable in the directions of the arrows e and f with respect to the chassis 4, a very complicated rotary drive mechanism is required to rotationally drive the rotary roller 2 with a stable rotational force. There was a problem that it was expensive.

The present invention has been made to solve the above-mentioned problems, and is a paper transporting method in which a pressure-bonding member is parallel and evenly pressure-bonded to a rotating roller supported at a fixed position. The purpose is to provide a device.

[0009]

SUMMARY OF THE INVENTION To achieve the above object, a paper conveying apparatus of the present invention comprises a chassis for rotatably supporting a rotating roller and a pressure-bonding force applied to both ends in the longitudinal direction of a pressure-bonding member. A pair of crimping means for crimping the crimping member to the rotating roller, a pair of positioning guides for movably supporting both longitudinal ends of the crimping member on the crimping center of the rotating roller in the crimping direction, and the crimping force. According to the present invention, a substantially central portion in the longitudinal direction of the pressure-bonding member is brought into contact with the pressure-bonding member, and a stopper for pressing the pressure-bonding member in parallel with the rotary roller is provided.

[0010]

In the paper conveying apparatus of the present invention constructed as described above, the rotary roller is supported at a fixed position, and the pressure bonding member is accurately positioned on the pressure bonding center of the rotary roller by the accuracy of the pair of positioning guides. Supported. Further, both ends in the longitudinal direction of the crimping member have a degree of freedom in the crimping direction with respect to the rotating roller, and a crimping force is applied to both ends in the longitudinal direction so that substantially central portions in the longitudinal direction are brought into contact with the stopper. Can freely rotate in the pressure-bonding direction with the stopper as a fulcrum, so that the twist of the pressure-bonding member with respect to the rotary roller is absorbed, and the pressure-bonding member can be accurately pressure-bonded in parallel to the rotary roller.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the paper conveying apparatus of the present invention is shown in FIG.
~ It demonstrates with reference to FIG. It should be noted that the same structural parts as those in FIGS. 7 to 9 are denoted by the same reference numerals, and redundant description will be omitted.

First, FIG. 6 shows a FAX (facsimile) 13 of a laptop, and a FAX main body 14
An LCD display 15 is attached to the upper part of the so as to be upright and inclinable. Then, the paper conveyance device 1 also serving as a scanner is provided inside the front cover 16 having an L-shaped cross section attached to the corner on the front end side of the FAX body 14.
Is stored. Then, the original paper 9 is inserted into the paper feed port 17 at the bottom of the front cover 16 from the direction of arrow d, and the paper exit 9 at the top of the front cover 16 is shown by arrow e.
Discharge in the direction. Then, during this period, the information written on the paper 9 is read and transmitted.

Next, referring to FIGS. 1 to 3, the paper conveying device 1 will be described.
Will be described in detail. First, both ends 3a in the left-right longitudinal direction (left-right direction in FIG. 3) of the roller shaft 3 of the horizontal rotary roller 2 are rotatably attached to a pair of left and right side plates 4a of the chassis 4 by a pair of bearings 19, and one side plate The motor 20 attached to 4a and the roller shaft 3 are connected by a gear train 21 for speed reduction.

A line element 5a, which is a reading line sensor (replaced by a writing line head in the case of a printer) as a scanner, is horizontally embedded in the front surface of the plate-like pressure-bonding member 5. . Then, the crimping member mounting plate 6 in which the crimping member 5 is horizontally mounted
A pair of left and right guide shafts 22 are horizontally attached to the pair of left and right side plates 6a with the same axis, and the axis P3 of these guide shafts 22 is on the element center P2 of the line element 5a. It is arranged at a position corresponding to 5b. In addition, on the outer circumference of these guide shafts 22, rollers 2 are provided.
3 is rotatably attached.

A pair of left and right guide grooves 24, which are positioning guides, are horizontally formed on the pair of side plates 4a of the chassis 4 at a height corresponding to the pressure-bonding center P1 of the rotating roller 2. A pair of guide shafts 22 in 24 are in the crimping direction by the rollers 23 and are indicated by arrows h, i.
It is movably supported in any direction.

The pair of left and right side plates 6a of the crimping member mounting plate 6 form a pair of left and right spring locking portions 25 formed under the guide shaft 22 and the pair of left and right side plates 4a of the chassis 4 which form a pair of left and right sides. A pair of left and right pressure-bonding means 8, which are tension springs, are stretched between the spring locking portion 26 and the line element 5a of the pressure-bonding member 5 is pressure-bonded to the rotary roller 2 in the direction of arrow h by these pressure-bonding means 8. ing.

A stopper 27 is formed on the bottom plate 4b of the chassis 4 below the pair of crimping means 8. The stopper 27 is arranged substantially at the center of the crimping member 5 in the left-right longitudinal direction (left-right direction in FIG. 3) and directly below the front surface 5b of the line element 5a, and in the left-right longitudinal direction of the bottom plate 6b of the crimping member mounting plate 6. The contact portion 28 formed directly below the front surface 5b of the line element 5a at substantially the center position of the line element 5a is contacted from the direction of the arrow h by the pressing force of the pair of pressing means 8.

Then, the gear train 21 is driven by the motor 20.
The rotary roller 2 is driven to rotate in the direction of arrow c via the paper feeding device, and the paper 9 inserted in the direction of arrow d from the paper feeding port 17 is fed to the paper feeding guide 10.
When guided by and inserted between the rotary roller 2 and the pressure-bonding member 5, the paper 9 is elastically sandwiched between the rotary roller 2 and the pressure-bonding member 5 against the pressure-bonding force of the pair of pressure-bonding means 8. And is conveyed in the direction of arrow c, and is ejected from the paper exit 18 to arrow e
Is discharged in the direction. During this time, the line element 5a of the pressure bonding member 5 reads (or writes) the information written on the paper 9.

According to the paper conveying apparatus 1 configured as described above, since the rotating roller 2 is supported at a fixed position,
The rotary roller 2 can be stably driven to rotate by the motor 20 via the gear train 21, which is a simple rotary drive mechanism.

The element center P2 of the line element 5a of the pressure-bonding member 5 is supported on the pressure-bonding center P1 of the rotary roller 2 with high accuracy by the accuracy of the pair of guide grooves 24 for guiding the pair of guide shafts 22. In addition, the pair of guide shafts 22 are arranged in the pair of guide grooves 24 in the pressure-bonding directions indicated by arrows h,
Since it can be freely moved in the i direction, both ends of the crimping member 5 in the longitudinal direction have a degree of freedom in the crimping direction with respect to the rotating roller 2. In addition, the crimping member 5 in which the pressing force is applied to both ends in the longitudinal direction and the substantially central portion in the longitudinal direction is brought into contact with the stopper 27 by the abutting portion 28 is the stopper 27.
Since it can freely rotate in the directions of the above-mentioned pressure-bonding directions j and k with the fulcrum as a fulcrum, the pressure-bonding member 5 for the rotating roller 2
Is absorbed, and the element center P2 of the line element 5a of the pressure-bonding member 5 can be accurately pressure-bonded in parallel to the pressure-bonding center P1 of the rotary roller 2.

Therefore, the paper 9 can be accurately conveyed in the direction perpendicular to the rotary roller 2, and the information written on the paper 9 can be accurately read by the line element 5a.

Next, FIGS. 4 and 5 show a modified example, in which a pair of left and right guide grooves 24 are formed in the crimp member mounting plate 6.
Formed on the pair of left and right side plates 6a of the
Is engaged with both ends 3a of the roller shaft 3 of the rotary roller 2 so as to be movable in the directions of arrows h and i, which are the pressure bonding directions.
The other configurations are the same as those in FIGS. 1 to 3 and have the same effects as described above.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made based on the technical idea of the present invention.

For example, the scanner or printer has been described in the above embodiment, but the present invention is not limited to these, and the paper 9 is simply conveyed by using the crimping member 5 without the line element 5a. It may be a paper transport device.

[0025]

Since the paper conveying apparatus of the present invention is constructed as described above, it has the following effects.

Since the rotary roller is supported at a fixed position and the pressure-bonding member is pressed against the rotary roller, the rotary roller can be stably rotated by a simple rotary drive mechanism such as a gear train, and the cost can be reduced. Become.

Due to the accuracy of the pair of positioning guides, the pressure-bonding member can be supported with high accuracy on the pressure-bonding center of the rotating roller, and both ends of the pressure-bonding member in the lengthwise direction have a degree of freedom in the pressure-bonding direction with respect to the rotating roller. The pressure-bonding member, in which the pressure-applying force is applied to both ends of the pressure-contact member, and the substantially central portion in the longitudinal direction is brought into contact with the stopper, can be freely rotated in the pressure-bonding direction with the stopper as a fulcrum. Since I made it possible to absorb the twist,
The pressure-bonding member can be pressure-bonded in parallel to the rotary roller with high accuracy, the paper can be accurately conveyed in the direction perpendicular to the rotary roller, and reading and writing with a line element or the like can be accurately performed.

Although the pair of positioning guides needs to be accurate, the precision of other parts and the position adjustment at the time of mounting are unnecessary, so that the manufacturing and assembling are simple and the cost is low.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating a paper conveyance device according to an embodiment of the present invention.

FIG. 2 is a side view of the above.

FIG. 3 is a plan view of the above.

FIG. 4 is a perspective view showing a modified example of the paper conveyance device.

FIG. 5 is a side view of the above.

FIG. 6 is a perspective view showing a FAX in which the above-described paper conveyance device is used.

FIG. 7 is a side view showing a conventional paper transport device.

FIG. 8 is a plan view of the above.

FIG. 9 is a side view showing another example of a conventional paper transport device.

[Explanation of symbols]

 1 Paper Transporting Device 2 Rotating Roller 4 Chassis 5 Crimping Member 8 Crimping Means (Tension Spring) 20 Motor 21 Gear Train (Rotation Drive Mechanism) 24 Guide Groove (Positioning Guide) 27 Stopper 28 Abutting Part P1 Crimping Center P2 Element Center

Claims (1)

Claim: What is claimed is: 1. A paper transporting device for transporting paper by sandwiching paper between a rotary roller and a plate-like pressure-bonding member, and a chassis for rotatably supporting the rotary roller, and the pressure-bonding member. A pair of crimping means for crimping the crimping member to the rotating roller by applying a crimping force to both longitudinal ends of the crimping member, and both longitudinal ends of the crimping member are movable in the crimping direction on the crimping center of the rotating roller. A pair of positioning guides that support the pressure roller, and a stopper that presses the pressure roller in parallel with the rotary roller by contacting a substantially central portion of the pressure member in the longitudinal direction by the pressure force. Paper transport device.