JP3225779U - Deflection type paper pickup device - Google Patents

Abstract

Provided is a deflecting sheet pickup device that can avoid damage due to sheet warpage. A deflecting paper pickup device provided in a paper supply path, comprising a paper separation roller provided to face and contact a paper supply unit, a paper supply tray and a paper supply unit. A paper stopper arm 40 provided between the stop position for restricting the passage of the paper and a paper supply position for passing the paper downstream of the paper supply path; and a paper stopper arm 40 downstream of the paper supply direction. A torsion spring portion fixedly connected to a wall surface located above the paper feed path, an extending portion connected to the torsion spring portion and extending into the paper feed path, and And a paper guide member including a lifting portion connected to the paper guiding portion, and a vertex provided at an end of the lifting portion. In addition, the paper guide section is movably provided in a gap space 21 formed between the paper supply unit and the paper separation roller. [Selection diagram] FIG. 5A

Description

  The present invention relates to a paper pickup device, and more particularly, to a deflection type paper pickup device capable of avoiding damage to a sheet due to warpage of the sheet.

  As shown in FIG. 1, the paper pick-up member is provided at the entrance of the automatic paper feeder, and has a structure for separating the overlapped paper and feeding it one by one. In order to avoid sending the stacked sheets, the sheet pickup member includes a sheet feeding path, a sheet pickup device 20 ′, a set of sheet separation device 30 ′, the sheet pickup device 20 ′ and the sheet And a paper stopper device 40 ′ provided between the separation device 30 ′. The paper stopper device 40 'is installed in the paper feed path so that the paper does not enter the paper feed path. The paper pick-up device 20 'sends the paper to the paper feed path in contact with the paper bundle. The paper separating device 30 'applies a frictional force to the fed paper, and regulates the passage of the paper that has been sent repeatedly.

  However, when separating paper, the paper is often damaged by warpage. Hereinafter, the situation of the sheet warpage often seen is shown in FIGS.

  As shown in FIG. 2, when the lower layer paper is sent to the paper feed path, the upper layer paper is not supported by the lower layer paper and falls freely, so that the front end of the paper slightly warps.

  As shown in FIG. 3, in order to improve the effect of sheet separation, the sheet separation device 30 'rotates in a direction to return the sheet to the sheet feeding tray. Therefore, one end of the sheet that comes into contact with the sheet separating device 30 ′ is easily hooked on the sheet separating roller and warped.

  As shown in FIG. 4, the paper separating device 30 'is usually made of an elastic material in order to improve the paper feeding force on the paper, so that the paper is pulled and elastically deformed in the paper feeding process. . Further, after the sheet has passed through the sheet separating device 30 ', the elastic deformation rebounds, so that the front end of the next sheet is warped.

  Accordingly, there is a need for a deflectable paper pickup device that has a paper guide function and can avoid damage due to paper warpage.

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a deflectable paper pickup device having a paper guide function and capable of avoiding damage due to paper warpage.

  In order to achieve the above object, a deflecting paper pickup device according to the present invention is a deflecting paper pickup device provided in a paper feed path, and a paper separation roller provided so as to face and contact a paper feed unit. And between a stop position that is provided between a paper feed tray and the paper feed unit and regulates the passage of paper and a paper feed position that passes paper downstream of the paper feed path. A paper stopper arm provided, a torsion spring portion fixedly connected to a wall positioned above the paper feeding path in the order from downstream to upstream in the paper feeding direction; An extension portion extending to the extension portion, a paper guide portion connected to the extension portion and substantially parallel to the paper feed path, a lifting portion connected to the paper guide portion, and provided at an end of the lifting portion. Comprising a sheet guide member including a vertex, the. The paper guide unit is movably provided in a gap space formed between the paper supply unit and the paper separation roller. The radius of the virtual circle from the paper separation roller to the lifting portion is larger than the diameter of the wheel of the paper separation roller, and the vertical distance between the paper waiting for feeding and the paper guide portion is the distance between the paper waiting for feeding and the paper It is larger than the vertical distance to the separation roller.

  In a preferred embodiment, a portion where the paper guide portion and the lifting portion are connected is located upstream of a contact portion between the paper separation roller and the paper waiting to be fed.

  In a preferred embodiment, the lifting portion is located downstream of the paper stopper arm in the paper feeding direction.

  In a preferred embodiment, when viewed from the axial direction of the sheet separating roller, an angle formed by the sheet guide section and the sheet feeding path is smaller than an angle formed by the lifting section and the sheet feeding path.

  In a preferred embodiment, the paper stopper arm is located upstream of the vertex.

  In a preferred embodiment, a vertical distance between the apex and the waiting sheet is longer than a vertical distance between the bottom end of the sheet stopper arm and the waiting sheet.

  According to the present invention, it is possible to provide a deflectable paper pickup device having a paper guide function and capable of avoiding damage due to paper warpage.

FIG. 10 is a side view of a conventional paper pickup device. FIG. 9 is a schematic diagram illustrating warpage caused by falling of a sheet in a conventional sheet pickup device. FIG. 9 is a schematic diagram illustrating warpage due to reverse rotation of a sheet separation roller in a conventional sheet pickup device. FIG. 9 is a schematic diagram illustrating warpage due to bouncing of a sheet separation roller in a conventional sheet pickup device. It is a side view of the present invention. FIG. 4 is a side view showing a state where the paper stopper arm of the present invention is lifted. FIG. 4 is a side view illustrating a paper guide member. FIG. 4 is a side view illustrating a sheet guide member and a sheet stopper arm. FIG. 4 is a perspective view of a paper guide member. FIG. 4 is a side view showing the paper guide member and the paper separation roller of the present invention. FIG. 9B is an enlarged schematic view of a portion A in FIG. 9A.

  Hereinafter, the technical contents, structural features, objects, and effects of the present invention will be described in detail with reference to the drawings.

  First, a description will be given with reference to FIGS. 5A and 5B. The deflecting paper pick-up device 10 according to the present invention is provided between a paper feed tray 11 and a paper feed path 12, and sends paper stacked in the paper feed tray 11 to the paper feed path 12, and A sheet stopper arm 40, a sheet guide member 50, a sheet supply unit 20 provided so as to face and contact both sides of the sheet supply path 12 in order from the upstream to the downstream in the sheet direction, and a sheet separation roller 30. In this specification, the terms "upstream" and "downstream" are referred to as the side where paper enters and the side where paper exits, respectively, unless explicitly defined.

  The paper stopper arm 40 is provided so as to be movable in a direction perpendicular to the paper feed path 12, and includes a stop position for restricting the passage of paper, a paper feed position for passing paper through the paper feed path 12, and Switch between. The paper guide member 50 is movably provided in the paper feed path 12 and is used to guide the paper to make smooth contact with the paper feed unit 20.

  This will be described with reference to FIGS. 5A, 5B, and 6. FIG. The paper guide member 50 includes a torsion spring portion 51, an extension portion 52 connected to the torsion spring portion 51 and extending into the paper supply path, and an extension portion 52 extending from the downstream to the upstream in the paper supply direction. And a paper guide portion 53 substantially parallel to the paper feed path and provided in a clearance space formed between the paper feed unit and the paper separation roller, and a lifting device connected to the paper guide portion 53. And an apex 55 provided at an end of the lifting portion 54. The paper guide member 50 is fixedly connected to the upper wall of the paper feed path by the torsion spring 51. Among them, the paper in the guide portion is provided in the paper feed path in a deflectable manner by the interaction between the torsion spring portion 51 and the lifting portion 54, so that the paper is guided and smoothly passes through the paper feed unit. I do.

  This will be described with reference to FIG. In this embodiment, the paper guide member 50 is formed by bending a single metal wire and has a symmetrical form. The torsion spring portion 51 includes two spiral structures installed to face each other. The paper guide member 50 is fixed to the paper feed path 12 by covering the spiral structure on a connection shaft 13 a formed by extending the upper wall of the paper feed path.

  This will be described with reference to FIGS. 6, 9A and 9B. The paper guide member 50 is vertically movably provided in a gap space 21 formed between the paper supply unit 20 and the paper separation roller 30. Accordingly, since the angle between the paper guide unit 53 and the paper feed path 12 is a small angle θ1, the paper can be guided and brought into smooth contact with the paper feed unit 20. An intersection point A is provided at a point where the paper guide section 53 and the lifting section 54 are connected (a point where the curvature becomes maximum in the transition section). In order to secure the sheet guide effect, the point of contact between the sheet waiting to be fed and the sheet separating roller 30 is E, and the intersection A is provided upstream of the contact point E. The vertical distance D1 between the paper waiting for feeding and the paper guide section 53 is larger than the vertical distance D2 between the paper waiting for feeding and the paper separating roller 30.

  The lifting section 54 is located downstream of the paper stopper arm 40 in the paper feeding direction. The radius DS1 of the virtual circle from the paper separation roller 30 to the lifting portion 54 is larger than the wheel diameter DS of the paper separation roller 30. Further, there is an angle θ2 between the lifting section 54 and the paper feed path 12. Since the angle θ2 is larger than the angle θ1, when the sheet awaiting feeding passes through the sheet stopper arm 40 and comes into contact with the lifting section 54, more vertical force is generated on the lifting section 54, and It generates a force to lift the paper guide member 50 in a direction away from the paper feed path 12.

  Finally, a description will be given with reference to FIGS. As shown in the figure, the position of the apex 55 substantially coincides with the position of the paper stopper arm 40 in the paper feeding process. A contact point C between the sheet waiting sheet and the sheet stopper arm 40 is provided upstream of the vertex 55. Note that the vertical distance between the apex 55 and the paper to be fed is longer than the vertical distance between the bottom end of the paper stopper arm 40 and the paper to be fed. With the above configuration, in the paper feeding process, premature contact between the paper waiting to be fed and the paper separating roller 30 is avoided, and paper feeding is performed due to a gap generated between the paper guide member 50 and the paper stopper arm 40. It is possible to prevent the waiting sheet from contacting the lifting section 54 and the sheet guide section 53 in order.

DESCRIPTION OF SYMBOLS 10 Deflection type paper pick-up device 11 Paper feed tray 12 Paper feed path 13 Upper wall 13a Connection shaft 20 Paper feed unit 20 'Paper feed device 21 Clearance space 30 Paper separation roller 30' Paper separation device 31 Wheel shaft 40 Paper stopper arm 40 'Paper Stopper device 50 Paper guide member 51 Torsion spring portion 51a Spiral structure 52 Extension portion 53 Paper guide portion 54 Lifting portion 55 Apex

Claims (6)

A deflection paper pickup device provided in a paper feed path,
A paper separation roller provided so as to face and contact the paper feeding unit;
A paper feed tray is provided between the paper feed unit and the paper feed unit. The paper feed unit is provided so as to be movable between a stop position for restricting the passage of paper and a paper feed position for passing paper downstream of the paper feed path. A paper stopper arm,
A torsion spring portion fixedly connected to a wall surface located above the paper feeding path, an extending portion connected to the torsion spring portion and extending into the paper feeding path, in the order from downstream to upstream in the paper feeding direction; A paper guide member that is connected to the extension unit and that is substantially parallel to the paper feed path, a lifting unit that is connected to the paper guide unit, and a paper guide member that includes a vertex provided at an end of the lifting unit.
Including
The paper guide unit is movably provided in a gap space formed between the paper supply unit and the paper separation roller,
The radius of the virtual circle from the paper separation roller to the lifting portion is larger than the diameter of the wheel of the paper separation roller,
The vertical distance between the paper waiting to be fed and the paper guide portion is larger than the vertical distance between the paper waiting to be fed and the paper separating roller.
A deflecting paper pickup device, characterized in that:   The deflecting sheet pickup according to claim 1, wherein a point where the sheet guide section and the lifting section are connected is located upstream of a contact point between the sheet separation roller and a sheet to be fed. apparatus.   The deflecting sheet pickup device according to claim 1, wherein the lifting unit is located downstream of the sheet stopper arm in a sheet feeding direction.   The angle formed by the paper guide portion and the paper feeding path when viewed from the axial direction of the paper separating roller is smaller than the angle formed by the lifting portion and the paper feeding path. Deflection type paper pickup device.   The deflectable sheet pickup device according to claim 1, wherein the sheet stopper arm is located upstream of the vertex.   2. The deflectable sheet pickup device according to claim 1, wherein a vertical distance between the apex and the sheet waiting to be fed is larger than a vertical distance between a bottom end of the sheet stopper arm and the sheet waiting to be fed.

Images