JPH0373724A - Paper feeding structure - Google Patents

Abstract

PURPOSE:To improve the replacement work performance of a paper feeding roller by connecting the opened edge of a rotary shaft and the opened edge of an auxiliary shaft by a connecting member and installing the paper feeding roller in demountable manners from the opened edge side to the rotary shaft and so as to be revolved together with the rotary shaft in this state. CONSTITUTION:When a paper feeding roller 5 is replaced, a connecting member 7 is demounted, and the paper feeding roller 5 is pulled out from the opened edge side of a rotary shaft 1, and a new paper feeding roller 5 is installed onto the rotary shaft 1. Then, the opened edge of the rotary shaft 1 and the opened edge of an auxiliary shaft 3 are connected by the connecting member 7, and replacement is completed. In this case, the interval between the opened edge of the rotary shaft and the opened edge of the auxiliary shaft is desirably larger than the axis length of the paper feeding roller. Further, even if the axis length of the paper feeding roller is longer than the interval between the opened edges, the auxiliary shaft or rotary shaft can be demounted by only twisting said shaft when the paper feeding roller is demounted, if either the auxiliary shaft or the rotary shaft is held so as to be capable of swing centering a side plats which holds the shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a paper feeding structure in a copying machine, a printer, etc., and particularly relates to an improvement in a paper feeding roller section.

<Prior Art> Conventionally, paper feed rollers have been employed in the paper feed structures of copiers, printers, and the like. Conventional paper feed rollers are: ■ one that is integrated with the rotating shaft;
One in which the paper feed roller is removable from the rotating shaft as disclosed in Publication No. 4; ■ The paper feeding roller is removably attached to the rotating shaft supported on only one side as shown in Figure 3. There were things that were given, etc.

<Problems to be Solved by the Invention> The paper feed roller has its peripheral surface made of a material with a large friction coefficient, such as rubber, and feeds the paper by the frictional force generated between it and the paper. Therefore, the peripheral surface of the paper feed roller wears out with use.

For this reason, the paper feed roller is a component that is replaced relatively frequently, and must be easy to replace.

Regarding the paper feed rollers mentioned above, it is easier to replace the paper feed rollers that can be removed from the rotation shaft as shown in ■ and ■, compared to the paper feed rollers that are integrated with the rotation shaft as shown in ■. Good sex.

However, in the structure (■), the axial length of the rotating shaft almost matches the interval between the side plates that support the rotating shaft, so in order to remove the paper feed roller from the rotating shaft, at least one end of the rotating shaft must be It is necessary to remove it from the side plate and then move the other end side from the side plate, so the replacement work is not very easy. Another drawback is that when removing it, care must be taken to ensure that the shifted rotating shaft does not come into contact with other parts.

On the other hand, in the structure (2), the deflection and mounting condition of the guide plate affect the paper feeding performance of the paper feeding roller. Therefore, as a paper feeding structure that must feed paper stably, it has an unstable element, which is not preferable. Also,
In strength design for holding a rotating shaft, an attempt to improve rigidity also has the disadvantage of adding space constraints.

Therefore, it is an object of the present invention to provide a paper feeding structure that solves the problems of the prior art and provides good exchange workability and stable paper feeding performance.

Means for Solving the Problems This invention provides a rotating shaft to which driving force is transmitted and rotated, one end of which is an open end, and a rotating shaft arranged on the longitudinal extension of the rotating shaft. and one end thereof is an open end, and the open end has an auxiliary shaft facing the open end of the rotating shaft at a predetermined distance, and can be freely attached to and detached from the rotating shaft from the open end side. This paper feeding structure includes a paper feeding roller that rotates together with the rotating shaft when attached to the rotating shaft, and a connecting member that connects the open end of the rotating shaft and the open ends of the auxiliary shaft.

Further, in the paper feeding structure described above, the connecting member prevents the paper feeding roller from shifting toward the open end of the rotating shaft when the paper feeding roller is attached to the rotating shaft. It is characterized by including regulatory means for regulating.

Operation> To replace the paper feed roller, remove the connecting member, pull out the paper feed roller from the open end of the rotating shaft, attach the new paper feed roller to the rotating shaft, and then attach the connecting member to the open end of the rotating shaft. And the open ends of the auxiliary shafts may be connected to each other.

The distance between the open end of the rotating shaft and the open end of the auxiliary shaft is preferably wider than the axial length of the paper feed roller. However, even if the shaft length of the paper feed roller is longer than the distance between the open ends, the holding structure is such that either the auxiliary shaft or the rotating shaft can swing around the side plate that holds the shaft. If so, there will be no problem since the paper feed roller can be attached and detached by twisting the auxiliary shaft or rotating shaft.

<Embodiment> Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic structural diagram showing the configuration of an embodiment of the present invention.

To explain this embodiment with reference to FIG. 1, the rotating shaft 1
is rotatably held by the side plate 2, and a drive source (not shown) is connected to a portion of the side plate 2 that projects to the right in the figure. The rotating shaft 1 is rotated by the driving force transmitted from the driving source.

In the figure, the left end of the rotating shaft 1 is an open end 1a that is not held by a side plate or the like.

An auxiliary shaft 3 is arranged on the left side of the rotation shaft 1 as an extension thereof. The auxiliary shaft 3 has the same shaft diameter as the rotating shaft 1, and its left end portion is held by the side plate 4. and auxiliary shaft 3
The right end is an open end 3a that is not held by a side plate or the like, and faces the left open end 1a of the rotating shaft 1 with a predetermined distance therebetween.

Further, the left end of the rotating shaft 1 and the right end of the auxiliary shaft 3 are connected by a connecting vibrator 7. Further, an E ring 8 is fitted so as to engage with the left end of the connecting vibrator 7.
is fixed so that it does not shift to the left.

A paper feed roller 5 is attached to the rotating shaft 1.

The paper feed roller 5 rotates together with the rotating shaft 1. The paper feed roller 5 is a cylindrical member having an outer diameter larger than the outer diameter of the connecting vibrator 7, and its peripheral surface is made of silicone rubber having a large coefficient of friction, for example. In this embodiment, the axial length L2 of the paper feed roller 5 is shorter than the distance between the left open end 1a of the rotating shaft 1 and the right open end 3a of the auxiliary shaft 3.

Further, although not shown, the rotating shaft 1 is provided with a positioning protrusion for defining the mounting position of the paper feed roller 5, and the paper feed roller 5 is prevented from entering to the right side beyond a certain position by the positioning protrusion. It's like that. On the other hand, the left end of the paper feed roller 5 is in contact with the right end of the connecting vibrator 7, so that the paper feed roller 5 is prevented from shifting to the left along the rotating shaft 1.

By the way, in this embodiment, when the rotating shaft 1 is rotated,
Although the paper feed roller 5 rotates, the rotation of the rotating shaft 1 is not transmitted to the connecting vibrator 7, and the space between the connecting vibrator 7 and the rotating shaft 1 is configured to rotate idly.

Instead of such a configuration, the rotation of the rotating shaft 1 is controlled by the connecting vibrator 7.
Alternatively, the connection vibration 7 and the auxiliary shaft 3 may be configured to slide. Alternatively, the rotating shaft 1, the connecting vibrator 7, and the auxiliary shaft 3 may rotate integrally. In this case, it is sufficient that the auxiliary shaft 3 is rotatably held by the side plate 4.

In this embodiment, the axial length L2 of the paper feed roller 54 is
and the distance between the auxiliary shaft 3, and the axial length L of the paper feed roller 5.
2 may be larger than the distance between the rotating shaft 1 and the auxiliary shaft 3. In this case, for example, the auxiliary shaft 3 may be held by the side plate 4 so as to be swingable. Then, when replacing the paper feed roller 5, there is no problem in removing the paper feed roller 5 by twisting the auxiliary shaft 3 a little.

When replacing the paper feed roller 5, remove the E-ring 8, shift the connecting vibrator 7 to the left along the auxiliary shaft 3, and replace the paper feed roller 5.
can be removed from the open end 1a side of the rotating shaft 1. Then, attach a new paper feed roller 5 to the rotating shaft 1 from the open end 1a of the rotating shaft 1, connect the auxiliary shaft 3 and the rotating shaft 1 with the connecting vibrator 7, and fit the E-ring 8 onto the auxiliary shaft 3. .

In this embodiment, the right end of the connecting vibrator 7 contacts the paper feed roller 5 to prevent the paper feed roller from shifting to the left. The positioning may be performed only by positioning protrusions or the like.

In this embodiment, the connecting vibrator 7 is used to connect the rotary shaft 1 and the auxiliary shaft 3, but the rotary shaft 1 and the auxiliary shaft 3 may be connected by a threaded shaft 9 as shown in FIG.

<Effects of the Invention> Since the present invention is configured as described above, it is possible to provide a paper feeding structure with good paper feeding roller replacement workability and stable paper feeding performance.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a paper feeding structure according to an embodiment of the present invention. FIG. 2 is a diagram showing a paper feeding structure according to another embodiment of the invention. FIG. 3 is a diagram showing the structure of a conventional cantilever-supported paper feed roller. In the figure, 1... rotating shaft, 2, 4... side plate, 3...
... Auxiliary shaft, 5 ... Paper feed roller, 7 ... Connecting vibrator, 9 ... Screw shaft.

Claims (1)

[Claims] 1. A rotating shaft to which driving force is transmitted and rotated, one end of which is an open end; The open end has an auxiliary shaft facing the open end of the rotating shaft at a predetermined distance, and the open end can be freely attached to and detached from the rotating shaft, and the open end is attached to the rotating shaft. A paper feeding structure comprising: a paper feeding roller that rotates together with a rotating shaft; and a connecting member that connects the open end of the rotating shaft and the open ends of the auxiliary shaft. 2. In the paper feeding structure according to claim 1, the connecting member is configured to move so that the paper feeding roller does not shift toward the open end side of the rotating shaft when the paper feeding roller is attached to the rotating shaft. This is characterized by the fact that it includes regulatory means to regulate the