JPH04201943A - Sheet conveyor device - Google Patents

Abstract

PURPOSE:To convey sheets in a fully desirable way by disposing a carrier roller, with a gap slightly larger than the thickness of a sheet to be conveyed, above the curved lower part of a guide plate. CONSTITUTION:A carrier roller 28 is disposed, with a gap slightly larger than the thickness of a sheet 8 to be conveyed, above the curved lower part 22 of a guide plate 18. Undesirable deformation is not thereby applied to the sheet 8, and yet the sheet 8 can be positively brought into contact with the surface of the carrier roller 28 so as to be conveyed in a fully desirable way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a sheet paper conveying device that is conveniently applied to electrostatic copying machines, printing machines, and the like.

[Prior art]

As is well known, in the main body or attached sorter of an electrostatic copying machine or printing machine, the conveyance path extends downwardly toward the downstream, reaches a curved lower part, and then extends upwardly toward the downstream. It is often required to transport sheets of paper. In such a case, for example, as disclosed in the specification and drawings of Japanese Patent Application No. 1-319753 filed by the present applicant, the curved lower part extends downwardly toward the downstream. a guide plate extending upwardly toward the downstream, a driven transport roller disposed in association with the curved lower portion of the guide plate, and a sheet of paper fed to the upstream end of the guide plate. A sheet conveying device is used, which includes a deflecting member that directs the curved portion toward the lower portion of the curve.

Usually, a plurality of conveyance rollers are arranged at intervals in the width direction. On the other hand, in the curved lower part of the guide plate, a plurality of openings are formed at intervals in the width direction so as to correspond to the conveyance rollers. Each of the conveying rollers is positioned relative to the guide plate so that a portion thereof is recessed into the opening.

[Problems with conventional technology]

Therefore, the conventional sheet paper conveying device as described above has
The problem is as follows. That is, when a sheet of paper is passed along the curved lower part of the guide plate, a plurality of conveyance rollers positioned at intervals in the width direction move through openings formed in the guide plate at intervals in the width direction. Since the sheet paper is partially immersed in the opening, a plurality of portions of the sheet paper spaced apart in the width direction are forcibly immersed into the opening, and other portions remain on the guide plate, so that the sheet paper is deformed into a wave shape in the width direction (conventionally, in order to strengthen the so-called layer of the sheet paper by deforming the sheet paper into a wave shape in this way, it is not necessary to provide a driven conveyance roller on the lower side of the sheet paper. It was thought that it was possible to transport a sheet of paper simply by arranging a driven transport roller on the top side of the sheet.)
. Such deformation is not inherently desirable for the paper sheet, and there is a considerable risk that it may cause unacceptable damage to the paper sheet.

In order to convey the paper sheet without having to deform it, it is of course necessary to use a driven conveyor which protrudes upward from the opening formed in the guide plate and cooperates with the driven conveyance roller to nip the sheet paper between them. All you need to do is provide a roller. However, the provision of such a driven conveyance roller necessarily increases the manufacturing cost of the sheet conveyance device considerably.

[Technical problem of the invention]

The present invention has been made in view of the above facts, and its technical problem is to solve the need to deform sheet paper into a wave shape in the width direction without significantly increasing the manufacturing cost of a sheet paper conveying device. It is to avoid.

[Means for solving the invention]

As a result of intensive research and experiments, the present inventor surprisingly found that the sheet paper can be deformed into a wave shape in the width direction without forming an opening in the guide plate and partially immersing the conveying roller into the opening. A driven conveyance roller is disposed above the curved bottom of the guide plate with a gap slightly larger than the thickness of the sheet paper to be conveyed, and the rotational direction of the circumferential surface of the conveyance roller is so that the leading edge of the sheet paper is brought into contact with the angle range of 90 to 150 degrees,
It has been found that if the sheet member is deflected by the deflecting member, the sheet paper can be conveyed as required without any hindrance.

That is, according to the present invention, the guide plate extends downwardly toward the downstream to reach the curved lower portion, and then extends upwardly toward the downstream, and the curved lower portion of the guide plate. A sheet paper conveying device comprising a driven conveyance roller disposed in association with the guide plate, and a deflection member that directs the sheet paper fed to the upstream end of the guide plate toward the curved lower part, wherein the conveyance roller is connected to the guide plate. The deflecting member is disposed above the curved lower part of the plate with a gap slightly larger than the thickness of the sheet paper to be conveyed, and the deflecting member directs the front edge of the sheet paper to the circumferential surface of the conveyance roller. A sheet paper conveying device is provided, which is characterized in that the contact is made in an angular range of 90 to 150 degrees when viewed from above in the rotation direction.

Advantageously, the gap between the transport roller and the curved lower part of the guide plate is between 0.3 and 0.7 m. The transport roller is preferably made of a material with a high coefficient of friction, especially foamed resin or synthetic rubber.

[Operation of the Invention] In the sheet paper conveyance device of the present invention, since the conveyance rollers are arranged above the curved lower part of the guide plate with a slight interval, undesirable deformation is not applied to the sheet paper being conveyed. You won't be disappointed. Nevertheless, the paper sheet is brought into reliable contact with the surface of the transport roller and is transported satisfactorily.

[Preferred specific example]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in further detail to the accompanying drawings, which illustrate preferred embodiments of a sheet transport apparatus constructed in accordance with the present invention.

FIGS. 1 and 2 show a preferred embodiment of a sheet conveying device constructed in accordance with the present invention, which is applied to a system in which a plurality of sorters are arranged in tandem attached to an electrostatic copying machine. Illustrated. Electrostatic copier (not shown)
A pair of conveyance rollers, that is, a driven conveyance roller 4 and a driven conveyance roller 6 are disposed above the sorter 2 attached to the sorter 2 .

Upstream of the transport rollers 4 and 6, there are distributing means (not shown) for distributing the sheet paper 8 fed to the inlet end of the sorter into a plurality of trays in the sorter itself, and the transport roller 4. A selection mechanism (not shown) is provided to selectively lead to one of the two directions. The sheet paper 8 guided between the transport rollers 4 and 6 is conveyed by the transport action of the transport rollers 4 and 6, which are rotated in the direction shown by the arrow 10, by the sheet paper transport device 12 constructed according to the invention.
supplied to

A pair of side plates 14 and 16 are fixed to the upper part of the sorter 2 at a predetermined interval in the width direction (direction perpendicular to the plane of the paper in FIG. 1, vertical direction in FIG. 2). The sheet conveying device 12 includes a guide plate 18 fixed between the pair of side plates 14 and 16. The guide plate 18, which can be formed from a metal plate or synthetic resin, has an upstream portion 20 extending downwardly from an upstream end located below the downstream side of the conveying rollers 4 and 6 toward the downstream side. , a curved lower part 22 following this upstream part 20 , and a curved lower part 22
A downstream portion 24 extending upwardly toward the downstream from
and has. A curved lower portion 22 connecting the upstream portion 20 and the downstream portion 24 is curved into a substantially arc shape. A driven shaft 26 extending substantially horizontally above the curved lower portion 22 of the guide plate 18 is rotatably mounted between the pair of side plates 14 and 16. A plurality of driven conveyance rollers 28 are fixed to the driven shaft 26 at predetermined intervals in the axial direction, that is, the width direction. It is preferable that the conveying roller 28 is made of a material with a high coefficient of friction.

Suitable materials include foamed resin or synthetic rubber. The conveyance roller 28 is located at the curved lower part 2 of the guide plate 18.
It is important that it be positioned above 2 with a predetermined gap. The gap between the conveying roller 28 and the curved lower part 22 of the guide plate 18 is such that the sheet paper 8 to be conveyed passes between them.
It is important that the thickness be slightly larger than the thickness of , and preferably about 0.3 to 0.7 m.

The driven shaft 26 to which the conveyance roller 28 is fixed is connected to a rotational drive source (not shown) via an appropriate connection means (not shown), and the driven shaft 26 and the driven shaft 26 fixed to this The conveying roller 28 is driven to rotate in the direction shown by the arrow 10.

A support shaft 32 is also rotatably mounted between the pair of side plates 14 and 16. A plurality of deflection members 34 are fixed to the support shaft 32 at intervals in the axial direction, that is, the width direction. Each of the deflection members 34 positioned between the conveyance rollers 28 in the width direction has a substantially triangular shape, and has a deflection edge 36 having a smooth arc shape and a guide edge 38 extending linearly. A switching hand & (TIIJ not shown), which may be an electromagnetic solenoid, is connected to the support shaft 32, and the support shaft 32 and the deflection member 34 fixed thereto are set at a first angle shown by a solid line in FIG. and a second angular position indicated by a two-dot chain line in FIG.

In the illustrated embodiment, an additional guide plate 40 is also provided extending along and above the downstream portion 24 of the guide plate 18. The downstream portion 24 of the guide plate 18 and the additional guide plate 40
In relation to this, a driven shaft 42 and a driven shaft 44 are rotatably mounted between the pair of side plates 14 and 16. A plurality of driven conveyance rollers 46 are fixed to a driven shaft 42 that extends substantially horizontally at intervals in the axial direction.

A plurality of driven conveyance rollers 48 are also fixed to a driven shaft 44 extending above and substantially parallel to the driven shaft 42 at intervals in the axial direction in correspondence with the driven conveyance rollers 46 . Driven transport rollers 46, which can be made of a suitable synthetic resin, project upwardly through openings 50 formed in the downstream portion 24 of the guide plate 18 at widthwise intervals. The driven conveyance roller 48, which can also be formed from a suitable synthetic resin, is connected to the additional guide plate 40.
The drive conveyance roller 46 projects downward through openings 52 formed at intervals in the width direction.
Collaborate with. The driven shaft 42 is connected to a drive source (not shown) via a suitable connection means (not shown), and is connected to a driven conveyance roller 46 and a driven conveyance roller 48.
is rotated in the direction shown by arrow 10.

In the illustrated embodiment, the pair of side plates 14 are further connected to the downstream end of the guide edge 38 of the deflection member 34.
and 16, a driven shaft 54 and a driven shaft 56 are rotatably mounted. A plurality of driven conveyance rollers 5 are arranged at intervals in the axial direction on a driven shaft 54 that extends substantially horizontally.
8 is fixed. A driven shaft 56 extending above and substantially parallel to the driven shaft 54 also includes a driven conveyance roller 58.
A plurality of driven conveyance rollers 60 are fixed at intervals in the axial direction corresponding to the distance. The cooperating driven transport roller 58 and driven transport roller 60 may be formed from any suitable synthetic resin. The driven shaft 54 is connected to a drive source (not shown) via a suitable connection means (not shown), and the driven conveyance roller 58 and driven conveyance roller 60 also rotate in the direction shown by arrow 10. I am forced to do it. On the downstream side of the driven conveyance roller 58 and the driven conveyance roller 60, there is a collection tray 6 mounted on the additional guide plate 40.
2 are arranged.

In the sheet paper conveying device 12 as described above, the deflection member 34 is the eleventh! When the paper sheet 8 is positioned at the second angular position indicated by the two-dot chain line at I, the sheet paper 8 sent out from the pair of conveyor rollers 4 and 6 is moved along the guide edge 38 of the deflection member 34 and transport rollers 58 and 6
0, and is discharged onto the sleeve tray 62 by the pair of conveyance rollers 58 and 60. On the other hand, when the deflecting member 34 is positioned at the first angular position shown by the solid line in FIG. It is deflected by the action of the deflecting edge 36 of 34 and brought into contact with the circumferential surface of the conveying roller 28 .

The front edge of the sheet paper 8 hits the circumferential surface of the conveying roller 28 in the area indicated by number 64 in FIG. It is important to be approached. When these requirements are met, the interaction between the sheet paper 8, which is about to proceed in the downstream direction, and the surface of the conveying roller 28, which is rotated in the direction shown by the arrow 10 and is about to wind up the sheet paper 8, The sheet paper 8 is brought into sufficient pressure contact with the surface of the transport roller 28, and the sheet paper 8 is thus transported by the action of the transport roller 28. When the leading edge of the paper sheet 8 passes over the curved lower part 22 of the guide plate 18 and enters the downstream section 24, the paper sheet 8 is forced upward, thereby ensuring that the paper sheet 8 is more securely moved by the conveying rollers 28. The paper sheet 8 is brought into pressure contact with the surface, so that the sheet paper 8 continues to be transported satisfactorily by the action of the transport rollers 28. The front edge of the sheet paper 8 deflected by the deflection edge 38 of the deflection member 34 is brought into contact with the surface of the conveyance roller 28 above the above-mentioned area 64, that is, in an angular area within 90 degrees from the top of the conveyance roller 28. In this case, the sheet paper 8 is
A force is applied to deflect the sheet paper 8 upward or return it to the upstream side, and the sheet paper 8 cannot be brought into good contact with the circumferential surface of the conveyance roller 28, so that the sheet paper 8 cannot be conveyed smoothly. Tend. Further, the leading edge of the sheet paper 8 deflected by the deflecting edge 38 of the deflecting member 34 is
4, that is, 150 mm from the top of the conveying roller 28.
When the paper sheet 8 is brought into contact with the circumferential surface of the conveying roller 28 at an angle exceeding 10 degrees, the sheet paper 8 tends to separate downward from the circumferential surface of the conveying roller 28, which is rotated in the direction shown by the arrow 10. Therefore, smooth conveyance of the sheet paper 8 cannot be stably realized.

The sheet paper 8 conveyed to the downstream portion 24 of the guide plate 18 is further conveyed by the action of a pair of conveying rollers 58 and 60, and is then conveyed to the inlet portion of the next sorter (not shown) disposed downstream. transported.

The configuration of the sorter itself to which the sheet conveying device configured according to the present invention is applied is explained in detail in, for example, the specification and drawings of Japanese Patent Application No. 1-319753 mentioned above. , description thereof will be omitted in this specification.

Although a specific example of a sheet paper conveying device configured according to the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited to such specific example, and various modifications may be made without departing from the present invention. It goes without saying that modifications and modifications are possible.

〔Effect of the invention〕

The sheet paper conveying device of the present invention can be manufactured without increasing the cost compared to conventional sheet paper conveying devices, and avoids the problems that existed in conventional sheet paper conveying devices, namely, undesirable deformation of the sheet paper. It is possible to reliably avoid the problem of adding paper sheets and to convey the sheet paper smoothly.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing a preferred embodiment of a sheet conveying device constructed in accordance with the present invention. FIG. 2 is a horizontal sectional view showing the sheet conveying device of FIG. 1. 2... Sorter 8... Sheet paper 12... Sheet paper conveyance device 18... Guide plate 20... Upstream portion of guide plate 22... Curved lower part 24 of the guide plate...Downstream part 28 of the guide plate...Driven conveyance roller 34...Deflection member 36...Deflection edge 38 of the deflection member...・Guide edge of deflection member

Claims (1)

[Claims] 1. A guide plate extending downwardly toward the downstream to reach a curved lower part, and then extending upwardly toward the downstream, and the curved lower part of the guide plate. A sheet paper conveying device comprising a driven conveyance roller disposed in association with the guide plate, and a deflection member that directs the sheet paper fed to the upstream end of the guide plate toward the curved lower part, wherein the conveyance roller is connected to the guide plate. The deflecting member is disposed above the curved lower part of the plate with a gap slightly larger than the thickness of the sheet paper to be conveyed, and the deflecting member directs the front edge of the sheet paper to the circumferential surface of the conveyance roller. A sheet paper conveying device characterized in that the sheet paper conveying device is brought into contact in an angular range of 90 to 150 degrees when viewed from above in the rotation direction. 2. The gap between the conveyance roller and the curved lower part of the guide plate is 0.
The sheet paper transport device according to claim 1, having a thickness of 3 to 0.7 mm. 3. The sheet paper conveying device according to claim 1 or 2, wherein the conveying roller is made of a material having a high coefficient of friction. 4. The sheet paper conveying device according to claim 3, wherein the conveying roller is made of foamed resin or synthetic rubber.