JPS6141718Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is used for cooling rollers for copying machines, especially for dry copying machines, for cooling and feeding out transfer paper on which an image has been fixed by a heat fixing device, and for cooling rollers for other heat-bearing members. The present invention relates to a cooling roller used for cooling.

BACKGROUND ART AND PROBLEMS Conventionally, cooling of thermal transfer paper, etc. after heat fixing has been carried out simply by an air cooling method using a blower fan. For this reason, when copying operations are repeated over a long period of time, the amount of heat stored in the feed rollers, etc. increases, and there is a problem in that the transfer paper that comes out of the copying machine becomes considerably heated.

This idea aims to solve these problems,
The present invention aims to present a cooling roller which itself has an excellent cooling effect.

Means to Solve the Problem This invention consists of a double metal pipe in which a concentric outer cylinder and an inner cylinder are integrally molded via a radial connecting frame, and both ends of the inner cylinder are connected to the outer cylinder and radially. The heat pipe protrudes from the connecting crosspiece, and the protrusion forms a rotating shaft portion, and the heat pipe is tightly inserted and fixed into the inner cylinder with at least one end protruding.
The present invention also provides a cooling roller for a copying machine in which a large number of heat radiation fins are attached to a protruding portion of at least one end of the heat pipe.

Embodiments Hereinafter, preferred specific configurations of this invention will be described with reference to illustrated embodiments.

1 is a metal roller main body, 2 is a heat pipe,
3 is a heat dissipation fin, and the roller main body 1 is made of, for example, an extruded aluminum tube, in which a concentric outer cylinder 4 and an inner cylinder 5 are integrally molded via a plurality of radial connecting bars 6, as shown in FIG. The heat pipe 2 is made of a double metal pipe, and a separately manufactured heat pipe 2 is tightly fitted into the inner cylinder 5 of the heat pipe. In addition, the roller main body 1 has both ends of the outer cylinder 4 and the radial connecting bar 6 cut and removed, so that both ends of the inner cylinder 5 protrude from them. Rotating shaft portions 7, 7 supported by bearings are formed at both ends. Heat dissipation fin 3
In these, one end of the heat pipe 2 is made to protrude from the roller main body 1 by a required length, and is attached to this protrusion at predetermined intervals by a brazing method or the like. Both of the rollers are inclined at a predetermined angle θ in the direction opposite to the roller main body 1. The inclination of the heat dissipation fins is such that the high-speed rotation of the roller guides the air layer near the surface of the fins away from the roller main body 1 by centrifugal force, making the cooling effect more effective. It is something. Note that 8 in the figure indicates a win.

Function The above-mentioned roller is used for sending out thermal transfer paper, etc., and the heat transferred to the outer cylinder 4 of the roller main body 1 by contact with the thermal transfer paper is transferred to the radial connecting bar 6 and the inner cylinder. The working fluid is transmitted to the heat pipe 2 via the tube 5 and evaporates the working fluid sealed within the heat pipe 2. The generated steam is guided from the outside toward the end of the heat pipe 2, where it is cooled by the heat dissipation fins 3, where it is cooled and condensed to become a working fluid, which is then returned to the other end of the heat pipe 2. transported by capillary action. By repeating such a cycle, the heat of the roller main body 1 is transferred at high speed in the direction of the heat dissipation fins 3 by the internal heat pipe 2, which is cooled and removes the heat from the thermal transfer paper, etc. , to achieve the desired cooling effect.

Effects of the invention As mentioned above, in this invention, the roller itself has a cooling effect, and when this roller is used, for example, as a roller for feeding out thermal transfer paper after heat fixing, it is difficult to copy for a long time. Even if the process is repeated, there is no problem that the transfer paper becomes hot, and copies with even better image fixation properties can be obtained. Moreover, it is economical as it does not consume any electricity etc.
Since heat pipes are used, heat is transferred from the heating section to the cooling section at a very high speed, resulting in an extremely excellent cooling effect.

In addition, the cooling roller of this invention consists of a double metal pipe in which a concentric outer cylinder and an inner cylinder are integrally formed via a radial connecting crosspiece, and both ends of the inner cylinder are connected to the outer cylinder and the radial connecting crosspiece. Since the rotating shaft is formed with this protrusion, the shaft can be formed by cutting both ends of the outer cylinder and the connecting bar of the extruded double metal pipe. It is possible to manufacture the required roller main body integrally, and there is no manufacturing hassle of attaching and fixing a separate shaft, which not only improves productivity, but also improves productivity.
Centering of the shaft can also be done reliably and easily. Also,
The product can be completed by inserting and fixing a separately manufactured heat pipe into the inner cylinder and attaching fins, so there are fewer operational difficulties in the entire manufacturing process and there are advantages such as excellent productivity. .

[Brief explanation of drawings]

The drawings show an embodiment of this invention; FIG. 1 is a partially exploded side view, and FIG. 2 is a sectional view taken along the line of FIG. 1. 1...Roller main body, 2...Heat pipe, 3...
...radiating fin, 4...outer cylinder, 5...inner cylinder, 6...
Radial connecting beam, 7...shaft portion.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of a double metal pipe in which a concentric outer cylinder and an inner cylinder are integrally formed via a radial connecting crosspiece, both ends of the inner cylinder protrude from the outer cylinder and the radial connecting crosspiece. A rotating shaft portion is formed with the protrusion, and a heat pipe is tightly inserted and fixed into the inner cylinder with at least one end protruding, and the protrusion on at least one end of the heat pipe is fixed. A cooling roller for copying machines that has a large number of heat dissipation fins attached to it. (2) The cooling roller for a copying machine according to claim 1, wherein the heat dissipation fins are disc-shaped and are inclined in a direction opposite to the main body of the roller in the axial cross section.