JPS6190965A - Sheets stagnating device - Google Patents

Abstract

PURPOSE:To prevent folding of the leading edge of sheet as well as occurrence of jam by furnishing a guide transfer means to reciprocate a guide, which is to restrict the sheet position in its lateral or longitudinal direction, for a certain distance between the side adaptional position and a wider position, and thereby restricting the stagnating position of the sheet. CONSTITUTION:When sheet transport is started, the stator windings of step motors 3, 4 are energized in opposite polarities at a certain spacing to put them into operation. Thereby a transverse guide 8 and a longitudinal guide 15 are reciprocated in the A-A' direction and B-B' direction, respectively. These reciprocations of guides 8 and 15 are performed between a certain proper position according to the size of the sheets transported and a position a little wider than said proper position by energizing the first turn of the stator of each step motors 3, 4 in such a polarity as to rotate their respective rotary shafts 3a, 4a in the F' and G' directions. Thus the stagnating position of the sheet can be surely restricted by reciprocating the guides to restrict the stagnating position in minute strokes to lead to prevention of possible trouble at the time of sheet stagnation.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a paper storage device used in a copying machine or the like, and more particularly to a paper storage device that regulates the paper storage position.

<Prior Art and Its Disadvantages> There is an apparatus such as a copying machine that transports paper from a paper feed section to a paper discharge section via a transport path. In the above-mentioned apparatus, a paper storage device is disposed at an intermediate portion of the conveyance path or at a paper discharge section for the purpose of improving subsequent workability. This paper storage device is equipped with a guide that regulates the storage position of transported sheets in either the horizontal direction or the vertical direction, or both, and is configured to sequentially stack and store the transported sheets at predetermined positions. In addition, in devices that transport paper of multiple paper sizes,
The guide is moved to a size suitable for the paper size of the paper to be conveyed. In the above device, due to changes in the engagement or friction between the paper and the rollers and belts that make up the transport path, the paper may move slightly in parallel or diagonal directions, and the paper may not be transported to the position regulated by the guide. Conventionally, the paper entrance side of the guide that regulates the position in the direction perpendicular to the paper transport direction is expanded diagonally.
The leading end of the paper is brought into contact with this inclined part so that the paper moves forward and is guided to the storage position. However, with the above-mentioned conventional paper storage device, it is not possible to effectively regulate the paper storage position when the paper being conveyed has a large misalignment or misalignment in a diagonal direction, and the leading edge of the paper may be bent. There was an inconvenience that caused jams. In addition, for example, in a storage device installed in the middle of the main device, such as a copying machine with a double-sided copying function, if paper is conveyed from the storage device in a state where the paper is misaligned, the back half of the main device Processing operations were not performed accurately, which resulted in a disadvantage that the operating efficiency of the main device decreased.

<Object of the Invention> In view of the above-mentioned conventional inconveniences, the object of the present invention is to be able to reliably regulate the storage position of transported paper, and to prevent the occurrence of folding of the leading edge of the paper or paper jams in the paper storage section. It is an object of the present invention to provide a paper storage device capable of preventing such problems and improving the operating efficiency of a main device.

<Configuration and Effects of the Invention> The present invention includes a guide that regulates the horizontal or vertical position when storing paper, and also positions the guide at a proper position matching the paper size and a position slightly smaller than the proper position when storing paper. It is characterized in that it is provided with a guide moving means for reciprocating at a constant interval between a wide position and a wide position.

According to the present invention configured as described above, the storage position of the transported paper can be reliably regulated,
It is possible to prevent the leading edge of the paper from folding or paper jams from occurring in the paper storage section, and the operating efficiency of the main device can be improved.

<Embodiment> FIG. 1 is a plan view showing the structure of a paper storage device which is an embodiment of the present invention.

The paper storage section 1 is composed of horizontal guides 8 and 9 and a vertical guide 15. One of the lateral guides 9 is fixed within the storage device as a reference plane for the storage position. A hole 8a is provided on the opposite side of the paper storage section of the other lateral guide 8.
is formed, and this hole 8a is threadedly engaged with the threaded portion 7a of the screw shaft 7. screw shaft 7
are pivotally supported by frames 2a and 2b of the paper storage device via bearings 16 and 17, respectively.
A gear 6 is fixed to a portion protruding to the outside on the a side. Also, this gear 6 is the rotating shaft 3a of the step motor 3.
It meshes with gear 5 fixed to.

The vertical guide 15 is formed vertically on one side of the flat plate 15a. A rack gear 14 is fixed to one end of the side surface of the flat plate 15a perpendicular to the vertical guide 15. This rack gear 14 meshes with a pinion gear 13 fixed to a shaft 12 disposed above the flat plate 15a. The shaft 12 is the frame 2a of the paper storage device.
and 2b via bearings 18 and 19, respectively. A gear 11 is attached to an end of the shaft 12 that protrudes outside on the frame 2a side.

This gear 11 meshes with a gear 10 fixed to the rotating shaft 4a of the step motor 4. The screw shafts 7 and 12 have collars 21 inserted between the gears 6 and 11 and the bearings 16 and I8, respectively, on the frame 2a side, and E in grooves formed at their respective ends on the frame 2b side. A ring 20 is press-fitted. This restricts the lateral movement of the screw shaft 7 and shaft 12 with respect to the paper storage device.

FIG. 2 is a diagram showing the structure of the guide drive section of the paper storage device. A gear 5 is attached to the screw shaft 7 in which a threaded portion 7a that is screwed into the hole 8a of the lateral guide 8 is formed.
The rotation of the step-knob motor 3 is transmitted through the motors 6 and 6. Further, the lateral guide 8 is provided with a hole 8b to prevent rotation when the guide moves, and a shaft 23 whose both ends are fixed to the frame of the paper storage device is passed through the hole 8b.

The pinion gear 1 meshes with the rack gear 14 fixed to the side surface of the flat +Ji 15a forming the longitudinal guide 15.
The rotation of the step motor 4 is transmitted to the shaft 12 to which the step motor 3 is fixed via gears 10 and 11.

The operation of the embodiment of the invention configured as described above will be described below.

When the paper size of the paper to be conveyed is determined, the step motors 3 and 4 are driven to move the horizontal guide 8 and the vertical guide 15 to positions matching the size.

That is, when the shaft portion 3a of the step motor 3 rotates in the direction of arrow F, the screw shaft 7 rotates in the direction of arrow C. A rotational force in the direction of arrow C is also applied to the lateral guide 8, which has a hole 8a that is screwed into the threaded portion 7a of the screw shaft 7. However, the shaft 23 passes through the hole 8b, and the rotation of the lateral guide 8 is restricted. For this reason,
When the threaded portion 7a of the screw shaft 7 is a right-handed thread, the rotation of the screw shaft 7 in the direction of arrow C causes the lateral guide 8 to move in the direction of arrow A. Conversely, when the polarity of the voltage supplied to the stator winding in the step motor 3 is reversed and the rotary shaft 3a rotates in the direction of arrow F', the lateral guide 8 moves in the direction of arrow A'. Further, when the rotating shaft 4a of the step motor 4 rotates in the direction of arrow G, the shaft 12 rotates in the direction of the arrow G, and the longitudinal guide 15 is rotated by the meshing of the pinion gear 13 and rack gear 14 fixed to the shaft 12. Move in the direction of arrow G. Conversely, when the rotating shaft 4a rotates in the direction of arrow G', the vertical guide 15 moves in the direction of arrow B'. This allows guides 8 and 1
The current position of paper 5 can be stored or detected, and step motors 3 and 4 can be driven so as to move to a position matching the paper size of the paper to be conveyed. When paper conveyance is started, the step motors 3 and 4 are driven by exciting the windings of their stators to opposite polarities at regular intervals. As a result, the horizontal guide 8 and the vertical guide 15 reciprocate in the directions of arrows A, A' and B, B', respectively. The guide 8
and 15 reciprocate between a proper position matching the paper size of the paper to be conveyed and a position slightly wider than this proper position.

In the above embodiment, the screw shaft 7 is the shaft 1
The paper conveyed in the F direction in FIG. 1 is guided between the screw shaft 7 and the shaft 12 by a vertical guide (not shown).

FIG. 3 is a plan view of another embodiment of the invention.

The paper storage device shown in the figure is used in a conveyance device that uses the center position of the paper as a reference. The screw shaft 7 has threaded portions 7a and 7b with the same pinch and opposite directions. Furthermore, lateral guides 8 and 8' are provided with holes 8a and 8a' that are screwed into the threaded portions 7a and 7b, respectively. Rotation of the lateral guides 8 and 8' in the axial direction of the screw shaft 7 is restricted. As a result, when the step motor 3 is driven in the opposite direction at regular intervals, when the left guide 8 moves in the direction of arrow A', the right guide 8' moves in the direction of arrow A, and the left guide moves in the direction of arrow A, as shown by the dotted line in the figure. When moved to position 28, the right guide also moves to position 28', which is also indicated by a dotted line. Conversely, when the left guide moves in the direction of arrow A, the right guide moves in the direction of arrow A'. By adjusting the guides 8 and 8' so that they are at the proper position in the closest position, the paper can be stored with the center position of the paper as a reference.

As described above, by slightly reciprocating the guide that regulates the storage position during paper transport, the paper storage position can be reliably regulated, and troubles during paper storage can be prevented. When a paper storage device is disposed in the middle of the conveyance path, the latter half of the operation of the main device can always be performed effectively.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a paper storage device according to an embodiment of the present invention, FIG. 2 is a structural diagram of the main part of the same embodiment, and FIG. 3 is a plan view showing another embodiment of the invention. 1-paper storage unit, 3,4-step motor, 5.6,1
0.11 - gear, 7 - screw shaft, 8 - transverse guide, 13 - pinion gear, 14 - rack gear, 15 - longitudinal guide.

Claims (1)

[Claims] (1) It is equipped with a guide that regulates the horizontal or vertical position when storing paper, and when storing paper, the guide is moved at a fixed interval between the appropriate position that matches the paper size and a position wider than the appropriate position. What is claimed is: 1. A paper storage device characterized by comprising a guide moving means for moving the paper.