JPS61203038A - Feeding roller - Google Patents

Abstract

PURPOSE:To enable to use a core metal repeatedly when a feeding roller is replaced, by installing a horse shoe form core metal fixed at the shaft pressuring in its periphery into an enclosed space of a heavy friction member formed in an endless belt, in a feeding roller of a copying machine or the like. CONSTITUTION:A core metal 12, with a horse shoe form groove 18, and with a peripheral groove 17 formed by franges 13 and 13', is fixed to a driving shaft 11 by a screw a. Then a heavy friction member 10, made into an endless belt form, is formed into an enclosed space b to form a horse shoe shape, and the core metal is pressured into the enclosed space b. In this way, the grooves 17 and 18 are covered by the heavy friction member 10, unifying the member 10 and the metal 12. In this composition, the feeding roller can be replaced by changing only the heavy friction member, and the core metal can be used repeatedly.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a feeding roller for conveying sheet materials such as paper in a feeding device such as a copying machine or a printer.

<Prior art> Conventional feeding rollers used for conveying paper are roughly divided into, for example, full-circumferential types and half-moon-shaped types. A high-friction member is provided around the periphery, while a half-moon type type has a part of the outer periphery cut out. The half-moon type is mainly used to feed sheet materials loaded in a cassette one by one, and has the feature that it does not come into contact with the sheet materials except during feeding (when stopped or immediately after feeding is complete). .

However, in both of these methods, a high-friction member such as urethane rubber is placed in the contact area with the paper to improve paper conveyance, but in terms of durability during continuous paper feeding, high-friction members are required Periodic replacement was necessary to prevent the frictional force from decreasing due to wear and tear on the corners, aging, and adhesion of paper dust, toner, etc.

At this time, in the case of the full circumference type, as shown in FIG. Front plate 4 of paper device main body
In many cases, the drive shaft 3 is supported by the rear plate 5 across the rear side plate 5, and therefore, in order to replace the high friction member 1, it is necessary to remove the drive shaft 3 from the paper feeder main body, and this replacement work is very time-consuming. There were drawbacks. In addition, in the half-moon type, as shown in Fig. 8, the arc-shaped high friction member 6 was glued to the core metal 7, and the core metal 7 was fixed to the drive shaft 8 with screws 9. In some cases, when replacing the high friction member 6, it takes a lot of time to remove each core bar 7 from the drive shaft 8 one by one, and then attach the core bar 7 with the new high friction member 6 glued to the drive shaft 8 with screws. This requires a lot of work, and the core metal 7 has to be discarded every time the high friction member 6 is replaced, resulting in waste.

<Problems to be Solved by the Invention> The present invention completely eliminates the drawbacks of the above-mentioned conventional examples, and at the same time, in the half-moon type, it was previously necessary to bond a particularly high friction member to the core metal part. The present invention makes it possible to attach the high-friction member to the core metal part by fitting the high-friction member without the need for adhesion, thereby eliminating the need for the high-friction member to have good adhesive properties, The aim is to provide a completely new technology that makes it possible to use materials that could not be used in the past due to friction but poor adhesion.

Means for Solving the Problems〉 One embodiment of the roller according to the present invention will be specifically explained with reference to the drawings. Figs. 1 to 3 each show an embodiment of a full-circumference type. , FIG. 1 is a perspective view showing a drive shaft 11, a core metal 12 fixed thereto with a screw a, and a high friction member 10 attached to this core metal 12, and FIGS. ), (C), and (D) are parts lO on the core bar 12.
Fig. 3 (A
L (B) is an explanatory view showing an example of the shape of the member 10. As is clear from the above figures, in the present invention, two flanges 13 and 13' are provided protruding from the outer peripheral surface, and a ring is inserted between them. After fixing the core metal 12, which has a horseshoe-shaped groove 17 and a horseshoe-shaped groove 18 on its inner circumferential surface, to the drive shaft 11 with a screw, a continuous belt made of a material such as urethane rubber formed into a horseshoe shape is attached. The high friction member 10 is press-fitted into the groove 17 on the outer peripheral surface of the core metal 12 and the groove I18 on the inner peripheral surface of the core metal 12, thereby forming a T-fitting structure in which the high friction member 10 is wound around the core metal 12. The high-friction element 10 is therefore prevented from shifting in the thrust direction, in particular by the action of the flanges 13, 13'.

The above-mentioned high friction member 10 may be in the form of a simple belt as shown in FIG.
2 may be arranged in advance in a shape that fits in the core metal 1.
By making it small so that tension is generated when fitting it into the core metal 12, it is possible to reduce misalignment with the core metal 12. In addition, this high friction member 10 has a thick wall at the part that contacts the paper, and a thin wall at the part where it fits into the center of the core bar 12. It is possible to adjust the tension when it is settled.

Next, FIGS. 4 to 6 show embodiments of a half-moon type, respectively. FIG. 4 is a perspective view showing a half-moon-shaped core bar 15, and FIG. 6 is an explanatory diagram showing a half-moon-shaped high friction member 14 and a core metal 15, respectively, and FIG. 6 shows a core metal 1.
FIG. 5 is an explanatory diagram showing a state in which a member 14 is attached to 5. FIG. As is clear from the above figure, the half-moon-shaped core bar 1 in this embodiment
An II 20 is provided on the outer peripheral surface of the member 5 by two half-moon-shaped flanges 19 and 19', and a groove 21 into which the lower part of the member 14 can be fitted is formed on the inner peripheral surface, and this core metal 15 is screwed. It is fixed to the drive shaft 11 via a. Therefore, the half-moon-shaped member 14 is constructed by fitting its outer peripheral surface into I20 and press-fitting its lower part into the groove 21 so as to wrap it around the core metal 15. Particularly in the case of the half-moon type, small rollers 16 are provided for contacting and pushing down the paper being fed first.

<Example> The above example is an explanation of a drive shaft rotating type, but it is not limited to this type, but can also be applied to a type where the drive shaft that holds the core metal moves in parallel. Of course, it can also be applied in exactly the same way. Further, the feeding roller according to the present invention can be applied to either a roller that separates sheet materials from a loaded object or a roller that conveys separated sheet materials, but is not limited to both of these rollers. Of course, it is also possible to assemble using a releasable adhesive.

<Effects of the Invention> As explained above, in the present invention, the high-friction member of the feeding roller is attached while being sandwiched by the metal core, so that when replacing the high-friction member due to a decrease in the frictional force, etc., the conventional method is not required. There is no need to remove the entire core metal or drive shaft, and only the high-friction components can be replaced with a simple operation, making it easy to replace, and the core metal etc. can be used over and over again without having to be thrown away like in the past. There is no waste, and in the case of the half-moon type, the high-friction member can be assembled without gluing it to the core metal, so there are no restrictions on the adhesiveness of the material used as the high-friction member, and it is therefore inexpensive and high-performance. It has features such as being able to select and use high-performance materials from a wide range.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the components of this embodiment, Figure 2 (A
) is a sectional view of the roller, (B) is its left side view, (C) is its front view, (D) is its right side view, Figure 3 (A) is a side view of the member, and (B) is the core. (C) is its right side view, Figure 6 is a side view of the other roller, Figures 7 and 8 are
The figures are explanatory diagrams showing conventional rollers. ], 6.10.14 are high friction members, 2. 7.
12°15 are core metals, 3. , 8.11 is the drive shaft, 1
3.13', 19°19' is the flange, 16 is the roller,
17.1B and 20.21 are grooves.

Claims (1)

[Claims] A high-friction member made of rubber, synthetic resin, etc. that is placed in contact with the sheet material and can be continuously connected to create a closed space, a core metal part that holds the high-friction member, and the core metal part. A feed roller assembled with a drive shaft for rotation or movement is characterized in that the drive shaft is disposed outside a closed space created by the continuously connected high friction member. feeding roller.