JPH065311Y2 - Paper feeder - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sheet feeding device.

2. Description of the Related Art First, a conventional example is shown in FIGS. As shown in FIG. 3, a pair of conveying rollers 2 and 3 for holding the sheet 1 is provided, and one conveying roller 2 is arranged in a plurality on a straight line and fixedly fitted to the shaft 4, while the other conveying roller 2 is arranged. A plurality of transport rollers 3 are linearly arranged and are rotatably fitted to a shaft 5.
One shaft 4 is connected to the motor. Further, a movable body 7 is held in a part of the frame 6 so as to be able to move toward and away from the intermediate portion of the shaft 4, and a hinge member 8 is fixed (see FIGS. 2 and 4). An arm 9 parallel to the shaft 4 is integrally formed in the hinge member 8, and a round hole 10 through which the arm 9 is projected is formed in the movable body 7. The screw 11 penetrating one end of the movable body 7 is screwed into the frame 6, and the screw 6 is fitted into the frame 6.
The leaf spring 12 held between the movable body 7 and the movable body 7 is fitted. Further, a pressing roller 13 is rotatably held at the other end of the movable body 7 with an axis parallel to the axis of the shaft 4.

On the other hand, the shafts 4 and 5 are formed of pipes for weight reduction, but since the shafts 4 and 5 are long in length so that they can be applied to a wide sheet 1, they are bent by their own weight. Therefore, the movable body 7 is rotated around the arm 9 as a fulcrum by rotating the screw 11 in accordance with the amount of bending of the shafts 4 and 5, and the shaft 4 is supported by the pressing roller 13 to cause skewing. It prevents the bending of.

Problems to be Solved by the Invention Since the shaft 4 and the pressing roller 13 are in line contact with each other with the axes parallel to each other, when the positions of both axes change due to vibration or the like, the conveying roller 2 and the pressing roller 13 The contact portion with 13 deviates from the straight line connecting the axes of the transport rollers 2 and 3,
The function of supporting the weight of the shaft 4 by the pressing roller 13 may be lost, and the purpose of preventing a gap between the transport rollers 2 and 3 may not be achieved. Therefore, in FIG. 3, it is necessary to accurately determine the position of the axial center of the pressing roller 13 in the height direction h and the lateral direction Y. To adjust the axial center in the height direction h, turn the screw 11. However, adjustment of the position of the axial center in the lateral direction Y is extremely troublesome. Although such a problem can be solved to some extent by increasing the outer diameter of the pressing roller 13, since the pressing roller 13 and the movable body 7 supporting the pressing roller 13 become large in size, the space for arranging these parts also becomes wide. There's a problem.

Means for solving the problem One side is provided with a conveying roller paired with a motor,
A movable body is arranged so as to be capable of advancing and retreating with respect to the intermediate portion of the shaft of one of the transport rollers, and a pressing roller is provided that comes into contact with the shaft or the outer circumference of the transport roller. The movable body is provided with an inclined support portion that rotatably holds an axis centering on a straight line.

Action The pressing roller can be brought into pressure contact with the shaft of the conveying roller or the conveying roller with an axis inclined with respect to a straight line parallel to the axis of the conveying roller, whereby the axial position of the pressing roller can be adjusted in the height direction. Although determined, the allowable range of the axial center position can be widened in the lateral direction, which simplifies the assembly and adjustment work. In addition, the pressing roller can prevent the shaft of the conveying roller from bending and can reliably prevent skew.

Embodiment An embodiment of the present invention will be described with reference to FIG. The same parts as those described in FIGS. 2 to 4 are designated by the same reference numerals, and the description thereof will be omitted. In the embodiment of the present invention, the movable roller 7 is integrally formed with an inclined support portion 14 for rotatably holding the pressing roller 13 at an inclination angle of θ with respect to a straight line parallel to the axis of the shaft 4. Is. This tilt angle θ
Is 4 ° in this embodiment.

In such a configuration, the pressing roller 13 can be brought into pressure contact with the shaft 4 of the conveying roller 2 or the conveying roller 2 with an axis inclined with respect to a straight line parallel to the axis of the conveying roller 2, whereby the pressing roller 13 is pressed. Although the position of the axis center of the height direction 13 of 13 is determined, the allowable range of the position of the axis center of the lateral direction Y can be widened, thereby simplifying the assembly and adjustment work. Further, the pressing roller 13 can prevent the shafts 4 and 5 of the conveying rollers 2 and 3 from bending, and can prevent the skew from occurring.

Effect of the Invention Since the present invention is configured as described above, the pressing roller can be pressed against the shaft of the conveying roller or the conveying roller with the axis inclined with respect to the straight line parallel to the axis of the conveying roller. , The axial position of the pressing roller in the height direction is determined, but the allowable range of the axial position of the lateral direction can be widened, which simplifies the assembly and adjustment work. This has the effect of preventing the shaft of the transport roller from bending and reliably preventing the occurrence of skew.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a plan view and FIGS. 2 to 4 show conventional examples.
The drawing is a plan view, FIG. 3 is a vertical side view, and FIG. 4 is a perspective view. 1 ... paper, 2,3 ... conveying rollers, 4,5 ... axis, 7
...... Movable body, 13 ...... Pressing roller, 14 ...... Inclined support section

Claims (1)

[Scope of utility model registration request] 1. A conveying roller, one of which is connected to a motor to form a pair, a movable body which is held so as to be movable back and forth with respect to an intermediate portion of a shaft of the one conveying roller, and an outer circumference of the shaft or the conveying roller. And a tilted support portion provided on the movable body and rotatably holding the pressure roller with an axis inclined with respect to a straight line parallel to the axis of the shaft. Paper feeding device.