JPH0224127Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a roller that does not accumulate heat in a paper transport roller of a copying machine, facsimile machine, printer, or the like.

(Prior art) As shown in FIG. 1, a conventional roller is made by fitting a stainless steel column 2 serving as a support shaft to both ends of an aluminum cylinder 1, and then cutting and polishing the column 2. Usually, it is processed to form the support shaft 4.

Therefore, a lot of material is wasted due to the processing of the stainless steel column 2, resulting in poor yield and high cost.

Further, it has disadvantages such as relatively low strength against bending, and surrounding heat is trapped within the cylindrical body of the device, making it impossible to dissipate heat.

An aluminum support roller has been proposed for the purpose of improving heat conduction (Japanese Patent Application Laid-Open No. 72238-1983).
However, this roller has a thick roller wall in order to have a certain heat capacity and mechanical strength.

(Purpose) The present invention provides a roller that can be manufactured in a short time with fewer man-hours, has a simple structure, is lightweight, and has a small amount of deformation.

Furthermore, the present invention provides a roller that generates ventilation inside the roller by its own rotation and improves heat dissipation during rotation.

(Structure) The roller of the present invention is constructed by fitting a support shaft into the inner cylinder portion at both ends of an aluminum roller body in which the inner and outer cylinders are integrally molded via radial ribs, and the communication space between the ribs is used as the roller body. It is open at both ends.

(Example) 11 is a roller body made of aluminum,
Three ribs 1 are provided between the outer cylinder part 12 and the inner cylinder part 13.
4, 15, and 16 were formed and manufactured by extrusion molding.

Reference numeral 18 denotes a communication space formed to communicate in the axial direction between each rib.

Reference numeral 21 denotes a support shaft, which is made of a stainless steel round bar that is slightly thicker than the inner diameter of the inner cylindrical portion 13 and has a predetermined size.A collar-like stepped portion 24 is formed on the base 23 of the stainless steel bar. It is fitted by press-fitting, shrink-fitting, etc. until it abuts the end face.

26 is a covering body formed as necessary.

(Effects) With the above-described roller, since the support shafts are simply fitted to both ends of the inner cylindrical portion of the roller body and then polished, a highly accurate, perfectly round roller can be obtained.
Since there is no cutting process involved, there is no wastage of materials, and
Can be produced in a short time.

Furthermore, since the outer cylinder part and the inner cylinder part are integrally molded and connected by a plurality of ribs, this product has high mechanical strength against bending stress, and a space is formed between the inner and outer cylinders that communicates with both ends of the roller. Since the rollers are rotated, heat can be dissipated through ventilation.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway sectional view of the conventional product, FIG. 2 is a partially cutaway sectional view of the proposed product, and FIG. 3 is a longitudinal sectional view thereof. 11...roller body, 12...outer cylinder part, 13...
...Inner cylinder part, 14, 15, 16...rib.

Claims (1)

[Scope of utility model registration request] An aluminum roller body whose inner and outer cylinders are integrally molded via radial ribs is constructed by fitting support shafts into inner cylinders at both ends, and communication spaces between the ribs are opened to both ends of the roller, respectively. Heat dissipation roller for paper transfer.