JPS60232354A - Sheet positioning device of copying machine or the like - Google Patents

Abstract

PURPOSE:To keep a thin sheet from being jammed by providing gliding plates above transport belts, thereby to prevent the leading end of a transported sheet from buckling when it is brought into contact with gates projected from positioning belts. CONSTITUTION:Gliding plates 12 are disposed above transport belts 6. The end portions of the gliding plates 12 on entry side are curved upward like a circular- arc, so that the leading end of the sheet can be easily advanced between the transport belts 6 and the gliding plates 12. Even if a sheet fed in by transport rolls is thin, the gliding plates 12 are adapted to keep the thin sheet from buckling when the sheet is brought into contact with the gates 11 of positioning belts 7 to prevent the occurrence of a paper jam due to buckling. Furthermore, as the transport force of the transport rolls is increased, a thick sheet can be fed reliably until it is brought into contact with the gates 11. Thus, the thick sheet can be also positioned with high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a belt gate type paper positioning device mainly used in copying machines.

2. Description of the Related Art As a sheet positioning device for a copying machine or the like employing a conventional belt gate method, one example of the one shown in FIG. 1 is known. The paper positioning device is composed of a plurality of conveyor belts α and a next positioning bell (b) provided between the conveyor belts α.

Positioning bell) b has a gate C that the leading edge of paper d comes into contact with.
is installed protrudingly. In addition, a slip roll C is provided on the paper inlet side of the conveyor belt α and positioning bell) b, and this slip roll 1Vc feeds the paper dt- until the leading edge of the paper d contacts the gate CK, and the leading edge of the paper d When the paper contacts the gate C, it slips against the paper d. However, in the above paper positioning device, in order to ensure the transport of the thick paper d, if the transport force of the slip roll e is increased, the thin paper d
In this case, when the leading edge of the paper d came into contact with the gate C, there were problems such as buckling, causing a paper jam or misalignment, and damage to the leading edge of the paper d.

OBJECT OF THE INVENTION The present invention has been made to improve the above-mentioned problems, and it is an object of the present invention to provide a paper positioning device for copying machines and the like that can position even thin paper without buckling it.

Constituent structure of the invention Of the conveyance belt and positioning belt provided on the paper conveyance path, above the conveyance belt.

A sliding plate is provided to prevent the leading edge of the paper conveyed by the conveyor belt from buckling when it comes into contact with a gate protruding from the positioning belt, so that even thin paper can be positioned without causing paper jams. paper positioning device for copying machines, etc.

Embodiment One embodiment of the present invention will be described in detail with reference to the first page shown in the second factor below. For example, the speed V from direction A.

Paper 2 transported from K is fed by transport rolls 3. The main body 1 has a plurality of strips wound between a pair of rolls 4.5.

For example, three conveyor belts 6 and a drive roll 9 provided between these conveyor belts 6 and, for example, two positioning belts 7, are rotated by a drive source 6 such as a stepping motor. and the driven roll 10, and the above-mentioned speed ■0 is carried out in the same direction as the conveyor belt 6.
It is designed to rotate at a slower speed Ve.

Further, on the upper surface of each positioning bolt 7, a groove 11 having a concave groove 11α into which the leading edge of the paper 2 enters is protruded from the paper introduction side. A sliding plate 12 is provided above each conveyor belt 6 so as to be parallel thereto. The sliding plate 12 is curved upward in an arc shape at the end on the paper input side, so that the leading edge of the paper 2 can easily enter between each conveyor belt 6 and the sliding plate 12, and the upper surface of each sliding plate 12 A plurality of support rods 12α are protruded from the.

The upper ends of these support rods 12α are supported by a frame 13 on the copying machine side so as to be vertically movable. Each support rod 12g has a compression spring 14 located between the sliding plate 12 and the frame 13.
are provided, and each sliding plate 12 is lightly pressed against the upper surface of the conveyor belt 6 by these compression springs 14. Note that 15 indicates a pinch roller.

Effects of the Invention In this invention, as described in detail above, since the sliding plate 12 is provided above the conveyor belt 6, even if the sheet 2 fed by the conveyor roll 3 is thin, the 1 positioning belt 7 Since the sliding plate 12 prevents the paper 2 from buckling by contacting the paper 2, it is possible to prevent the paper 2 from buckling and causing a paper jam. Also, the conveyor roll 3
Since the conveying force of the paper 2 can be increased, even the thick paper 2 can be reliably fed until it contacts the gate 11.
The positioning of ff can also be performed well.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a conventional paper positioning device, Fig. 2 is an overall side view showing an embodiment of the present invention, Fig. 3 is a perspective view of the main body, and Fig. 4 is an enlarged view of the vicinity of the gate. The cross section is grout. 2 is paper, 6 is conveyor belt, 7 is positioning belt, +1
is the gate, and 12 is the sliding board. Figure 1 Figure 4

Claims (1)

[Claims] Between the plurality of conveyor belts 6 provided on the paper conveyance path,
In a device provided with a positioning belt 7 protruding from a gate 11 for positioning the paper 2, each of the conveyor belts 6
A sheet positioning device for a copying machine or the like, which is provided with a sliding plate 12 provided above in contact with the sheet 2 conveyed by the conveyor belt 6 to prevent the sheet 20/171.