JPS6357441A - Sheet feed roller - Google Patents

Abstract

PURPOSE:To replace a resilient member with new one, rapidly and easily, by forming a resilient member in a belt-like form having ends, and by winding and fixing the resilient member onto a core member. CONSTITUTION:A sheet feed roller 11 is composed to a core member 13 fixed onto a shaft 11 by means of a set-bolt 12, and an a resilient member 14 in a belt-like form having ends wound around the outer periphery of the core member 13. The resilient member 14 incorporates integrally L-shaped cross- sectioned shape engaging pieces 16, 16 in the inside parts of cut-out sections 15, 15 formed therein. In order to attach the core member 13 to the resilient member 14, these engaging pieces 16, 16 are axially inserted into an engaging groove 17 formed in the outer peripheral surface of the core member 13 to joint them with the cut-out sections 15, 15 being opposed to each other, thereby the resilient member 14 is wound and fixed on the core member 13.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to improvements in sheet feed rollers for feeding paper, plastic sheets, etc. in copying machines, facsimile machines, printers, and the like.

FIG. 7 shows a schematic structure of a paper feed roller in a copying machine, which is an example of a sheet feed roller of the present invention. In such a structure, frames 1, 1
A shaft 3 is rotatably attached to the shaft through bearings 2, 2,
A cylindrical rubber roller 5. is connected to this shaft 3 via a core material 4.
5 is attached.

A pulley 8 is attached to the end of the shaft 3 and is rotationally driven by a belt 7 via a clutch 6.

In this case, the rubber roller 5.5 constitutes a copy paper feeding roller, and the rotation of the pulley 8, which is rotationally driven by the belt 7, is intermittently transmitted to the shaft 3 via the clutch 6. , 5 are rotationally driven,
Copy paper (not shown) that comes into contact with this rubber roller 5.5 is fed out.

Although the feed roller shown in FIG. 7 is related to a copying machine, a similar sheet feed roller is also used in facsimile machines, printers, etc. that feed sheets of paper or the like.

Problems with the conventional technology By the way, when such a feed roller wears out, the coefficient of friction changes due to adhesion of paper dust, etc., and the paper feeding capacity decreases, it must be replaced. In the feed row, the feed roller is constituted by an endless cylindrical roller such as the rubber roller 5.5,
In order to replace the rubber rollers 5.5, it is necessary to remove the clutch 6 and pulley 8, pull out the shaft 3 from the bearings 2, 2, and then remove the rubber rollers 5, 5 together with the core materials 4, 4 from the shaft 3. This was an extremely time-consuming task.

OBJECTS OF THE INVENTION Accordingly, it is an object of the present invention to provide a sheet feed roller whose elastic members can be quickly and easily replaced.

Structure of the Invention In order to achieve the above object, the main means employed by the present invention is to provide a sheet feed roller in which a belt-like elastic member is fitted around the outer periphery of a cylindrical core material. This is a sheet feeding roller in which the elastic member is formed in the shape of a belt with ends, and the elastic member is wound and fixed around the core material.

Effect of the Invention In the present invention, since the elastic member is formed in the shape of a belt with ends, it is easy to remove the used elastic member from the core material, and a new sheet can be created by simply winding the elastic member around the core material. It can be restored as a feed roller.

Embodiments Next, embodiments embodying the present invention will be described with reference to FIGS. 1 to 6 to provide an understanding of the present invention. Here is the 1st I! 1 and 2 show a sheet feed roller according to the first embodiment of the present invention, FIG. 1 is a perspective view showing the assembled state, FIG. 2 is an exploded perspective view, and FIG. is a side view of the sheet feed roller according to the second embodiment;
The figure is a diagram corresponding to Figure 3 for the third embodiment, Figure 5 is a perspective view of the sheet feed roller according to the fourth embodiment, and Figure 6 is a diagram corresponding to the fifth embodiment. (a) is a perspective view thereof, and (b) is a developed side view of an elastic member that can be used in the same embodiment.

The following examples are merely specific examples of the present invention, and are not intended to limit the technical scope of the present invention.

First, a first embodiment will be described with reference to FIGS. 1 and 2.

In these figures, the sheet feed roller 1° is connected to the shaft 11.
It is constructed by attaching an elastic member 14 in the form of a belt with ends to the outer periphery of a core material 13 fixed by bolts 12.

As is clear from FIG. 2, which shows the state before installation, the elastic member 14 is integrally provided with a retaining piece 16.16 having a rectangular cross section on the inner side of the cutout end 15.15. 0 To attach the elastic member 14 to the core material 13, use this engaging piece 16.
16 formed in the axial direction on the outer periphery of the core material 13.
By inserting it in the axial direction, the notched ends 15.15 are joined in a facing state as shown in FIG. 1, and wound and fixed to the core material 13.

In addition, in order to make this fixed state more complete,
Small diameter portions 18 formed at both ends of the elastic member 14 in the axial direction
．． It is desirable to fasten it to the core material 13 by stopping 18 and fi 19.19.

Further, in order to increase the feeding force of the sheet feeding roller 10, it is desirable to form a tooth-shaped structure on the outer periphery of the elastic member 14 as shown in the figure, and in this case, the notch end 15 is exposed on the outer periphery of the elastic member 14. It is desirable to form the cutout end 15 so that it is located at the valley portion of the tooth-shaped structure to prevent the above-mentioned.

No. 11 mentioned above! FIG. 3 shows a sheet feed roller 101 according to a second embodiment, which is a modification of the embodiment of FIG. 1 shown in FIGS. In this case, the elastic member 1
4. A plurality of axial projections 20. having a substantially circular cross section are provided inside the axial direction.
20. ... are formed, and these protrusions 20.20.・・・
・Respectively, the core material 13. The axial engagement groove 21.21. ... by inserting the elastic member 14. is accreted and fixed onto the core material 13a. In addition, the elastic member 14
．． The shape of the cutout end 15 is the same as that of the first embodiment except for the presence or absence of the engagement piece 16.

In the first and second embodiments described above, the elastic members 14 and 14.
The elastic member 14 or 148 is fixed to the core material 13 or 13 with a gloss by forming the engagement piece 16 and the protrusion 2o on the inside of the core material 13 or 13 and attaching these to the engagement member 17 or 21. In the sheet feed roller 101° according to the third embodiment shown in FIG. 4, the core material of the elastic member is It has a fixed structure.

That is, in the embodiment shown in FIG. 4, as shown in the figure, the notch ends 15b and 15h of the elastic member 14 are provided with engaging protrusions 22 that engage with each other when they are screwed together, and these engaging protrusions 22.
An axial engagement groove 23 is formed to engage with the core member 13h, and when the elastic member 14b is attached to the core member 13h, the engagement protrusion 22 is engaged with the engagement groove 23. , cutout end 15
b, 15I.

The elastic member 14 is held in contact with the core member 13I.

Fasten one wrap around.

At this time, in order to ensure the adhesion of the elastic member 14b and the core material 13+ to the abutting surfaces of the two, a weak adhesive force (elastic member 1
It is preferable to apply an adhesive (to the extent that it can be easily removed when replacing 4b) or to form an uneven surface 24 for preventing slipping, such as a low left shape, on the abutting surfaces of the two (as shown in FIG. 4).

Further, in the sheet feed rollers 1oe and 10- according to the fourth embodiment shown in FIGS. 5 and 6(a) and (b),
Notch end 15c or 1 of elastic member 14c or 14J
5a are attached to each other with a strong adhesive. In such an example, the elastic members 14c and 14a are belt-shaped with ends before assembly, but in the assembled state shown in the figure,
The cutout ends 15e and 15- are completely joined to form an endless belt.

However, in this case, similar to the third embodiment shown in FIG.
Elastic members 14c, 14a and core material 13c.

In order to prevent the two from slipping, it is preferable to apply a weak adhesive to the contact surface with the contact surface 13J, or to form an uneven surface 24 such as a knurling shape as shown in FIG.

In the fourth embodiment shown in FIGS. 5 and 6, the cutout end 15e or 15 of each elastic member 14c or 14a is
In order to widen the bonding surface of a and improve the bonding effect, as shown in FIG. 6(b), the notched ends 15e, 15
It goes without saying that it is desirable that - be formed as an inclined surface with respect to the outer circumferential surface.

In particular, when the cutout end 15e is tilted with respect to the roller axis as shown in FIG. 5, the adhesive surface is further expanded, stronger adhesive force is obtained, and the amount of roller movement is reduced.

In addition, an axial groove is formed in the outer periphery of the core material 13c or 13- for the cutting edge to enter so that the cutting edge of the cutter does not directly hit the core material 13c or 13J when cutting the elastic member 14c or 14-. This is desirable.

Therefore, in the fourth embodiment, the elastic member 14c or 14J is fixed to the core material 13c or 13J by wrapping the elastic member 14c or 14J once by bonding the notch end 15c or 15- with a strong adhesive. Or, when replacing it when the elastic member 14c or 14- is worn out, make an axial cut in the elastic member 14c or 14- with a cutter or the like.
The elastic member 14c or 14J must be peeled off from the core material 13c or 13a. Therefore, if the elastic member 14c or 14J is to be adhered to the core material 13c or 13a, the adhesive applied to the contact surfaces of the two should be one with weak adhesive strength. , the elastic member 14c or 14a can be easily attached to the core material 13c or 1
3- It is necessary to be able to peel it off from the surface.

However, this is not necessary if the uneven surface 24 prevents the elastic members 14e, t4d and the core members 13c, 13J from slipping.

In addition, 1st. Second. In the third embodiment, the engagement groove 17
．． 21. From 23, the engagement piece 16, the protrusion 2°, the engagement protrusion 22
By removing each elastic member 14. 1
4m, 14I, can be easily removed from the core members 13, 13a+i3b, so the elastic members 14.14
□, there is no need to cut with a cutter or the like when removing 145.

Effects of the Invention As described above, the present invention provides a sheet feeding roller in which a belt-shaped elastic member is fitted around the outer periphery of a cylindrical core material, in which the elastic member is formed in the shape of a belt with ends. In addition, since this is a sheet feed roller that is fixedly fixed to the core material, when replacing the sheet feed roller, the elastic member can be attached to the core material without removing the shaft from the frame, etc. On the other hand, it was extremely easy to form a film, and the efficiency of replacing the sheet feed roller was significantly improved.

[Brief explanation of the drawing]

1 and 2 show a sheet feeding roller according to a first embodiment of the present invention, FIG. 1 is a perspective view showing the assembled state, FIG. 2 is an exploded perspective view of the same, and FIG. 3 is a side view of the sheet feed roller according to the second embodiment, FIG. 4 is a view corresponding to FIG. 3 regarding the third embodiment, and FIG. 5 is a side view of the sheet feed roller according to the fourth embodiment. Perspective view of, No. 6
The figures relate to the fifth embodiment, in which figure (a) is a perspective view, figure (b) is a developed side view of an elastic member that can be used in the fifth embodiment, and figure 7 is a conventional sheet for use. FIG. 2 is a perspective view showing how a paper feed roller for a copying machine, which is an example of a feed roller, is attached. (Explanation of symbols) 10, 10. , 101. , 10c , 10
a... Sheet feed roller 11... Shaft 13.13a-13a... Core material 14.14. ~14-...Elastic member 15.15a~15a...Notch end.

Claims (1)

[Claims] In a sheet feed roller in which a belt-like elastic member is fitted around the outer periphery of a cylindrical core material, the elastic member is formed into a belt shape with ends, and the elastic member is wound and fixed to the core material. Characteristic sheet feed roller.