JPH05270635A - Conveyor roller - Google Patents

Abstract

PURPOSE:To provide a new-type conveyor roller which is produced by using friction welding and which is able to reduce production cost and to enhance product quality. CONSTITUTION:This roller consists of a pipe 1, which forms a drum part of the roller, drum-attached flanges 2, 2, which are connected to both end surfaces of the pipe 1, and shafts 3, 3, which are fitted to both end parts of the pipe 1 via the drum-attached flanges 2, 2. At least butt joints 1a, 2a between the pipe 1 and the end surfaces of the drum-attached flanges 2, 2 on both sides are joined by friction welding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor roller of a roller conveyor used as an article conveying means.

[0002]

2. Description of the Related Art An example of a general assembly structure of conveyor rollers is shown in FIGS. That is, in this type of hollow roller, the pipe 10 that forms the roller body and the flange 20 that is attached to the inner circumference 10A at both ends of the pipe 10 are used.
And a shaft 30 attached to both ends of the pipe 10 via the flange 20. In the example of the welding type shown in FIG. 5, the flange 20 and the shaft 30 are welded with each other.
And is fixed to the pipe 10. Moreover, in the example of the bearing type shown in FIG.
After mechanically coupling the flange 20 to the bearing 20, the bearing 40 is assembled to the bearing cylinder 20a integrally formed with the flange 20, and the shaft 30A penetrates the shaft center of the pipe 10 through the bearing 40. There is.

[0003]

However, in such a current conveyor roller, the machining required for the inner circumference 10A of the pipe, the flange 20 and the like, and the pipe 10 and the flange 2 are required.
It takes a lot of man-hours for welding and assembling the shaft 0 and the shaft 30, and the production cost per roller is relatively high. Further, due to poor welding, misalignment during assembly, and the like, variations in joint strength and dimensional accuracy are likely to occur, and there are problems in leveling the quality of each roller and ensuring reliability.

In view of the above technical problems, the present invention proposes a new type conveyor roller utilizing friction welding which brings an improvement effect in both reduction of production cost and improvement of product quality.

[0005]

In a new type conveyor roller based on the present invention, a pipe forming a roller body portion, a body flange connected to both end surfaces of the pipe, and both end portions of the pipe via the body flange portion. And a pipe and a body flange, or a pipe and a body flange, and a body flange and a shaft, which are friction-welded to each other.

[0006]

In this conveyor roller, it is sufficient to prepare a pipe, a body flange formed by press working or cutting work, and a shaft as roller constituent members, such as a pipe and a body flange. The inner and outer peripheral surfaces can be simply and quickly joined by friction welding without requiring complicated machining. When friction welding is applied, joining of dissimilar materials can be easily performed, and there is little risk of causing joint failure or misalignment that is likely to occur in the case of conventional welding or mechanical coupling means. It is possible to realize a conveyor roller having high reliability of joint strength and excellent dimensional accuracy. Therefore, compared with the existing conveyor rollers, both productivity and cost are improved, and at the same time, quality improvement and stabilization of each roller can be achieved.

[0007]

1 shows a first embodiment of a conveyor roller according to the present invention. This conveyor roller includes a pipe 1 forming a roller body, flanges 2 and 2 connected to both end surfaces of the pipe 1, and a shaft attached to both ends of the pipe 1 via the flanges 2 and 2. 3 and 3 are provided. Here, the pipe 1 is made by cutting a long pipe material slightly shorter than the roller cylinder length, while each flange 2 with a cylinder is formed by pressing a plate material having approximately the same thickness as the pipe 1 to one side. It is formed of a cylindrical member in which a large-diameter cylindrical portion (pipe-shaped projection) 2A that is connected flush with the end surface of the pipe 1 and a small-diameter cylindrical portion 2B into which the shaft 3 is inserted are integrally projected on the opposite side. Each shaft 3 is formed by cutting a round bar into a predetermined size.

In this conveyor roller, however, the shafts 3 are integrally assembled to the small-diameter cylindrical portions 2B of the body flanges 2 by welding or mechanical coupling means.
The large-diameter cylindrical portion 2A of the body flange 2 is abutted against both ends of the pipe 1 at the concentric position, and both end surfaces 1a, 2a are frictionally pressure-welded fw to be integrally joined.

FIG. 3 shows an outline of the roller manufacturing method by the above friction welding. As shown in FIG. 3A, the pipe 1 and the body flange 2 are usually the former as the fixing means and the latter as the rotating means. The large diameter cylindrical portion 2 of the body flange 2 which is driven and rotated R around the axis after being set at concentric opposite positions
When the fixing means is advanced to the end surface 2a on the A side and the end surface 1a of the pipe 1 is abutted against each other, the joint portions of the two end surfaces 1a, 2a.
It is heated and heated by the frictional heat generation. When the rotation R of the body flange 2 is stopped from this state and the end faces 1a, 2a of the both are pressed F as shown in FIG. 7B, the joint portions are pressed together.

At this time, the flange 2 is formed to have a body having a large-diameter cylindrical portion 2A having the same diameter as the pipe 1, so that the heat capacity of the heating effect generated in the vicinity of the joint can be secured before the pressure welding. 1 side and the flange 2 side can be made uniform, and the burr B generated at the joint at the time of pressure contact is as shown in the figure.
It is possible to make both the inner side and the outer side of the joint bulge, which makes it possible to further improve the reliability of the pressure welding.

In the conveyor roller joined by the friction welding, as described above, the necessary pre-processing steps are reduced, and the pressing step itself can be performed simply and quickly.
Productivity can be improved and costs can be reduced, and there are few variations in product quality such as joint strength and dimensional accuracy, and highly reliable products can be obtained.

FIG. 2 shows a second conveyor roller according to the present invention.
In this embodiment, not only the pipe 1 and the body-side flanges 2 and 2 on both sides but also the body-side flange 2 and the shaft 3A are friction-welded to the end surfaces 2b and 3a. I am trying to join.

FIG. 4 shows an outline of a roller manufacturing method corresponding to the second embodiment, in which the small diameter cylindrical portion 2 of the body flange 2 is formed.
The end surface 2b on the B side and the end surface 3a of the flanged shaft 3A are
Friction welding is performed according to the same procedure as shown in FIG. 4 (A) and 4 (B), for convenience of description, a case where the shaft 3A is frictionally pressure-welded to the body-attached flange 2 already integrated with the pipe 1 is shown as an example.
It is also possible to precede the friction welding of the body flange 2 and the shaft 3A.

[Brief description of drawings]

FIG. 1 is a sectional view of a conveyor roller according to a first embodiment.

FIG. 2 is a sectional view of a conveyor roller showing a second embodiment.

3A and 3B are cross-sectional views each showing a friction welding process of a pipe and a body flange.

4 (A) and 4 (B) are cross-sectional views each showing a friction welding process of the body flange and the shaft.

FIG. 5 is a sectional view of a conveyor roller showing a conventional example.

FIG. 6 is a sectional view of a conveyor roller showing a conventional example.

[Explanation of symbols]

 1 Pipe 1a End Face 2 Body Flange 2A Large Diameter Cylindrical Part 2B Small Diameter Cylindrical Part 2a End Face 2b End Face 3 Shaft 3A Flange Shaft 3a End Face fw Friction Welding Part B Burr R Rotating F Pressing

Claims (1)

[Claims] 1. A pipe comprising a roller body, a body flange connected to both end surfaces of the pipe, and a shaft attached to both ends of the pipe via the body flange, and at least the pipe and the body flange. A conveyor roller characterized in that the end surface of the roller is friction-welded.