JPH0676247U - Guide roller for printing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] In a guide roller for a printing press, it is lightweight and easy to perform maintenance and inspection. In addition, it eliminates paper handling obstacles due to inertial weight, simplifies the manufacturing process, and reduces cost. [Structure] A guide roller for conveying and guiding a sheet of paper from the paper feeding section of the printing machine to the folding machine is injection-molded from aluminum to have a double-tube structure of an inner tube and an outer tube. Along with the inner pipe and the outer pipe, a plurality of stays are provided to bridge in the radial direction.Furthermore, the inner periphery of the inner pipe is provided with a plurality of ribs protruding inward except for both ends thereof, and both ends of the inner pipe are provided. Is fitted with a bearing for connection with the support shaft on the machine side to be integrated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lightweight guide roller for feeding, which is arranged in a section from a sheet feeding unit to a folder in a sheet feeding line of a rotary printing press, for example.

[0002]

[Prior art]

 A rotary printing press used for printing newspapers is provided with a line for continuously feeding sheet-shaped paper, and a plurality of guide rollers for guiding the paper in a predetermined direction are installed in this line.

Conventionally, as these guide rollers, those made of steel, the surface of which is coated with resin or plating, have been used. However, with these rollers, the weight of the rollers as a whole was large, which caused the paper feed error due to the inertia and the fluctuation of the tension, and the burden of maintenance and inspection was heavy.

On the other hand, in recent years, the weight of the roller has been reduced by using, for example, aluminum or plastic as a material. Examples thereof include those described in Japanese Examined Patent Publication No. 2-5654 and Japanese Utility Model Laid-Open No. 4-96456.

In the former, the surface of the roller is made of foamed aluminum to reduce the inertial weight during rotation. In the latter, the roller has a double tube structure and its outer tube is made of carbon fiber reinforced plastic. This also reduces the inertial weight.

[0006]

[Problems to be solved by the device]

 Each of the guide rollers arranged in the paper feeding line is connected to the supporting shaft of the apparatus by a bear ring so as to be freely rotatable. Therefore, as described in the latter publication, a structure in which bearings are incorporated at both ends of the roller is adopted.

However, since the outer tube is made of carbon fiber reinforced plastic and is not made of ordinary metal, if the bearing is directly fitted into the outer tube, it tends to cause a problem in matching in strength. For this reason, as described in this publication, a structure for separately compensating the strength by incorporating an annular body for receiving the bearing in the outer tube is adopted.

Further, in addition to those described in the above-mentioned publication, a roller having a double tube structure of an inner tube and an outer tube in order to reduce the overall weight is provided with an annular ring for bearing reception at both ends in the axial direction. The one with the housing of is used.

As described above, although the inertial weight is reduced by making the material of the roller itself lighter, from the viewpoint of incorporating the bearing, the bearing for compensating the mechanical strength of the material of the roller is used. The annulus for receiving requires a housing. For this reason, an increase in weight due to the additional provision of these separate members is unavoidable, which becomes a bottleneck in reducing the inertial weight of the entire roller.

The problem to be solved in the present invention is to eliminate the trouble of handling the paper due to inertial weight in a guide roller for a printing press, which is lightweight and can be easily maintained and inspected.

[0011]

[Means for Solving the Problems]

 The present invention is a guide roller arranged between a paper feeding section of a printing machine and a folding machine for guiding sheet-like paper, and is made of aluminum and is injection-molded to form an outer tube and an inner tube. A cross section having a heavy pipe structure and having a plurality of stays that connect these outer pipe and inner pipe in the radial direction, and the inner pipe is provided with a plurality of ribs protruding toward the center except at both ends in the axial direction thereof. It has a shape, and bearings for a spindle connected to the machine side are fitted and fixed to both ends of the inner pipe.

[0012]

[Action]

 The double-tube structure of the outer tube and the inner tube is reinforced by the stays between these tubes, and the strength of the guide roller against axial bending and twisting is maintained even if aluminum is used as the material.

Further, due to the double pipe structure and the reinforcement by the stay, the mechanical strength is maintained even if the bearings are directly fitted to both ends of the inner pipe. In addition, it is not necessary to separately provide an annular body or the like for incorporating the bearing, and the overall weight can be reduced.

[0014]

【Example】

 1 is a vertical sectional view of the guide roller of the present invention taken along a plane including its axis, FIG. 2 is a vertical sectional view taken along the line AA of FIG. 1, and FIG. 3 is an exploded perspective view of essential parts.

In the figure, the entire guide roller 1 is integrally formed by injection molding using aluminum as a material, and has a double pipe structure of an outer pipe 2 and an inner pipe 3. The outer tube 2 and the inner tube 3 are coaxially arranged, have the same axial length, and are joined by five stays 4 as shown in FIG. These stays 4 are radially arranged and formed so as to run over the entire length of the outer tube 2 and the inner tube 3 in the axial direction.

Five ribs 3 a are provided on the inner peripheral surface of the inner tube 3 except for both ends in the axial direction. As shown in FIG. 2, these ribs 3a are located on the extension line of the stay 4 in the radial direction and are erected over the entire length excluding both ends.

At both ends of the inner tube 3 in the axial direction, receiving seats 3b for bearings having slightly larger inner diameters are provided. The receiving seat 3b has an inner diameter into which the bearing 5 of the ball bearing fits tightly, and as shown in FIG. 1, a groove 3c is provided on the inner circumference of one receiving seat 3b. Then, a half-divided restraint ring 6 that receives the end face of the bearing 5 and restrains the end face is incorporated in the groove 3c.

Further, a support shaft 7 connected to the machine side is connected to the bearing 5, and movement of the bearing 5 and the restraint ring 6 in the axial direction is restricted by the holding rings 7a and 7b.

In the guide roller 1 manufactured by injection molding with the above-mentioned configuration, the outer tube 2, the inner tube 3 and the stay 4 are formed in the entire length in the axial direction thereof, and the rib 3a is similarly formed in the entire length of the guide roller 1. To be done. Therefore, after the injection molding, the receiving seat 3b and the rib 3a in the portion included therein may be cut off and machined to form the groove 3c. Then, the bearing 5 is fitted into the receiving seat 3b which is a part of the inner pipe 3, and the restraint ring 6 and the holding rings 7a and 7b restrain the bearing 5 and the bearing 5 of the support shaft 7 from each other. The guide roller 1 can be manufactured.

The bearing 5 is fitted in the receiving seat 3b, and the end face of the guide roller 1 which faces the center in the axial direction is connected to an annular step 3d (see FIG. 3) which can be the end of the receiving seat 3b. It is restrained by the end face of 3a, and the position of the other end face is regulated by the restraining ring 6 and the retaining rings 7a, 7b.

As described above, when the bearing 5 is incorporated into the guide roller 1, it is only necessary to fit the bearing 5 into the receiving seat 3b provided in a part of the inner tube 3, and it is not necessary to attach an annular member as in the conventional case. For this reason, the weight of the guide roller 1 can be reduced, and defective handling of paper due to inertial weight can be prevented.

The bearing 5 may be constrained by utilizing only the end surface of the rib 3a without cutting the receiving seat 3b for accommodating the bearing 5. Further, the surface of the outer tube 2 may be lined with alumite or a fluororesin in order to prevent contamination due to ink adhesion. Further, the number of ribs 3a is not limited to that shown in the figure, and can be set to an appropriate number.

[0023]

[Effect of device]

 In the present invention, the bearings need only be fitted to both ends of the guide rollers, which simplifies the manufacturing process and reduces the weight of the bearings, thereby extending the life of the bearings themselves and lightening the maintenance and inspection work load. Moreover, even if the bearing is made of aluminum to reduce the weight of the entire guide roller, the bearing is maintained without mechanical deterioration, and the handling of the paper due to inertial weight is not disturbed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a guide roller of the present invention taken along a plane including its axis.

FIG. 2 is a vertical sectional view taken along the line AA of FIG.

FIG. 3 is a schematic exploded perspective view showing how a bearing is incorporated into a guide roller.

[Explanation of symbols]

 1 guide roller 2 outer pipe 3 inner pipe 3a rib 3b receiving seat 3c groove 3d step 4 stay 5 bearing 6 restraining ring 7 spindle 7a retaining ring 7b retaining ring

Claims (1)

[Scope of utility model registration request] 1. A guide roller which is arranged between a paper feeding section of a printing machine and a folding machine and guides a sheet of paper to be conveyed. The guide roller comprises an outer tube and an inner tube formed by injection molding using aluminum as a material. It has a heavy pipe structure and has a plurality of stays that connect these outer pipe and inner pipe in the radial direction, and the inner pipe has a cross-sectional shape provided with a plurality of ribs protruding toward the center except for both ends in the axial direction. A guide roller for a printing machine, in which bearings for a spindle connected to the machine side are fitted and fixed to both ends of the inner tube.