JPH036571Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a conveyor roller, and in particular, a conveyor roller that has a simple structure, is easy to assemble, and is capable of inspecting the meandering state of the belt it carries while running. It is related to.

Conventionally, when rollers for conveyors are used in harsh environments such as transporting earth and sand as objects to be conveyed, in addition to achieving the original function of supporting the conveyor and conveying the objects to be conveyed, moisture,
It consists of a number of parts to prevent dust and other foreign matter from entering the inside of the roller, especially the rotating bearing of the roller. In other words, a conventional conveyor roller has a roller body, a bearing, a rotating shaft inserted into the bearing, etc., and holds the bearing at a predetermined position on the roller body.
In order to prevent moisture, dust, and other foreign substances from entering the rotating bearing part inside the roller, the bearing box, which is made of pressed steel plate or molded casting, is internally ground or clawed. By attaching the bearing box to the inner periphery of the roller body (outer shell), the bearing box is held in a predetermined position within the roller body and is manufactured to prevent the bearing from moving in the thrust direction of the roller. In order to prevent foreign matter from entering from the fitting attachment part between the outer periphery of the roller body and the roller body,
A sealing means made of steel plate and/or resin was required (see Utility Model Application No. 55665/1983).

Therefore, when manufacturing conventional conveyor rollers, the inner circumferential surface of the roller body requires internal grinding or pawl processing, which increases the number of processing steps and increases costs. The sealing means is cumbersome and difficult to install in a predetermined position, and it is impossible or extremely difficult to completely prevent moisture, dust, and other foreign matter from entering the rotating bearing inside the roller. It is difficult to achieve a complete seal, and the above-mentioned foreign matter may enter the roller, resulting in a high failure rate of the conveyor roller.

Furthermore, the roller bodies used in the production of conventional conveyor rollers are usually made of steel pipe-shaped members from the viewpoints of strength, rigidity, load resistance, and economic efficiency. The pipe-like member was cut to a predetermined length, and then both end surfaces of the pipe-like member cut to the predetermined length were painted to prevent rust and corrosion. In this way, when both end surfaces of a pipe-shaped member are painted,
Requires a painting process, which increases the number of processing steps,
This leads to a cost increase factor. However, in order to reduce the number of processing steps, if the pipe-shaped member is used as it is cut and the both end surfaces of the pipe-shaped member are not painted, the problem of rust and corrosion may occur on the pipe-shaped member. This will seriously impair the quality of the product.

For this reason, the conventional production of conveyor rollers requires a large number of processing steps, and the assembly work is complicated and cumbersome, making it not only unsuitable for mass production.
This leads to increased costs and the price of the roller itself.Furthermore, the failure rate of conveyor rollers is high due to the intrusion of foreign matter into the roller due to imperfect sealing.Furthermore, reducing the number of processing steps increases costs. If a painting process or the like is omitted in order to eliminate the cause, there is a drawback that the quality of the product is impaired due to the occurrence of rust and corrosion on the cut end surface of the roller body.

The present invention solves the various drawbacks of the conventional conveyor rollers, and in particular, the roller body is formed by simply cutting a pipe such as a steel pipe with a desired inner and outer diameter to a desired length. For example, a flanged bearing box integrally molded from a flexible material such as synthetic resin is press-fitted, and if desired, the end of the roller body is then bent inward together with the end of the bearing box. In particular, the number of processing steps is small, the assembly work is easy, and the sealing properties are good to prevent foreign matter from entering inside the roller, and rust on the cut end surface of the roller body is eliminated without painting. An object of the present invention is to provide a conveyor roller that is inexpensive and has an extremely simple structure that can prevent the occurrence of such problems.

In addition, the present invention allows the bearing box to be carried on the conveyor roller when the conveyor is assembled by coloring the entire bearing box or the flange part in a color different from the color of the roller body, such as white, yellow, or red. The meandering state of the belt during running can be very easily inspected, and it can also be easily determined whether the rollers are in operation or not, and it can function as a danger indicator to prevent people from approaching the conveyor while it is in operation. have If the belt snakes too much, it not only reduces operational efficiency, but also causes the belt to break, forcing work to be interrupted.Therefore, there has been a need for a method that can constantly and easily inspect the meandering state of the belt. . The present invention provides means that can fully meet these demands.

Next, the conveyor roller according to the present invention will be described in detail based on examples.

As understood by referring to FIG. 3, the roller body 1 is a cylindrical outer shell obtained by cutting a tube made of steel or the like having a predetermined inner diameter and outer diameter to a desired length.

The flanged shaft box sealing member 2 attached to the end of the roller body 1 is integrally molded from a highly rigid and flexible synthetic resin, preferably 6-nylon. The flanged axle box sealing member 2 has a cylindrical roller body holding portion 3 whose outer circumferential portion has approximately the same diameter as the inner circumferential diameter of the roller body 1, and the outer end of the holding portion 3 has a large diameter. An annular collar 4 is formed.
The outer diameter of the collar 4 is approximately the same as the outer diameter of the roller body 1, and the width t at the outer circumference of the collar 4 can be varied as desired, but the inner side surface 5 of the collar 4 is
It is preferable to form it so that it is inclined at an angle θ toward the outer side surface 6 with respect to the central axis, that is, the roller shaft 15 inserted into the bearing 7 described later. This angle of inclination θ will normally be 5-15°, preferably 10°.

As can be understood by referring to FIG. 2, the inner circumferential portion of the flanged axle box seal member 2 serves as a bearing holding portion 10 to which a bearing means, for example, an outer ring 8 of a ball bearing 7 is attached. The bearing holding part 10 is formed into a roughly cylindrical shape,
In particular, an annular projection 11 is provided at the inner end of the bearing holding portion 10.
is formed to protrude in the direction of the central axis. The outer end of the bearing holder 10 is connected to the roller body holder 3 by an annular rib 12 . On the other hand, an annular flange 13 is formed at the outer end of the bearing holding portion 10 so as to protrude toward the central axis by a predetermined length and cooperate with the annular projection 11 to hold the ball bearing 7.

Next, the assembly and manufacture of the conveyor roller of the present invention having such constituent members will be explained.

First, as shown in FIG. 2, the ball bearing 7 is mounted on the flanged axle box seal member 2. This ball bearing 7 moves in the direction of the arrow from the inside of the flanged axle box sealing member 2, that is, from the compression side in FIG. 2, and is pushed into the bearing holding portion 10. At this time, since the bearing holding part 10 is made of resin, the outer ring 8 of the ball bearing 7
1, the ball bearing 7 expands slightly as shown by the two-dot chain line, and when the entire ball bearing 7 is pushed into the bearing holder 10, it elastically returns to the original solid line position. As a result, the ball bearing 7 has an annular projection 11
It is fixed and held within the flanged axle box seal member 2 by the annular flange 13. In this way, the ball bearing 7 can be attached to the bearing holding part 10 in one-touch manner. Alternatively, the ball bearing 7 can be cast into the bearing holding portion 10 at the same time when the flanged axle box seal member 2 is molded.

Then, the flanged axle box sealing member 2 holding the ball bearing 7 is press-fitted into the end of the roller body 1 from the right side in FIG. 3, as shown in FIG.
At this time, that is, when the flanged axle box sealing member 2 is press-fitted into the roller body 1, the ball bearing 7 held integrally with the flanged axle box sealing member 2 has its inner ring 9
is inserted by fitting into the aforementioned roller shaft 15 that has been placed inside the roller body 1 in advance. In this press-fitting operation, the inner peripheral edge of the inner ring 9 of the flanged axle box sealing member 2 is inserted into the protruding pawl 16a provided on the roller shaft 15.
This is done until it engages.

At this time, as described above, since the inner side surface 5 of the collar 4 is inclined, the upper end of the inner side surface 5 of the collar 4 first comes into contact with the cut end surface 1' of the roller body 1.
Furthermore, since the outer circumferential portion of the cylindrical roller body holding portion 3 has approximately the same diameter as the inner circumferential diameter of the roller body 1, when the inner side surface 5 of the collar 4 comes into contact with the cut end surface 1', , the outer circumferential surface of the roller main body holding part 3 is in close contact with the inner circumferential surface of the roller main body 1, and the outer circumferential surface of the roller main body holding part 3 is a supporting surface that supports the roller main body 1. It will be appreciated that sealing means is provided to prevent foreign matter from entering inwardly from the engagement portion with the shaft box sealing member 2. At this time, since the outer circumferential edge of the collar 4 comes into close contact with the cut end surface of the roller body 1, it is possible to prevent foreign matter from entering into the roller from this portion.

After fitting the flanged shaft box sealing member 2 to the end portion 16 of the roller body 1 in this way (see FIG. 4),
As shown in FIG. 3, the end portion 16 of the roller body 1 is caulked with a caulking tool 100 and bent inward as shown by the arrow A-A, so that the end portion 16 is made of metal. While caulking different resin materials at the same time, attach the flanged shaft box sealing member 2 to the roller body 1.
It can be firmly fixed to the shaft to prevent its axial movement. Moreover, the terminal portion 16 of the roller body 1 that is generated by performing this caulking
Along with the deformation, the roller body holding portion 3 of the flanged axle box sealing member 2 is also deformed inward together with the roller body 1, and due to this deformation, the flanged axle box sealing member 2 becomes
It is firmly attached between the roller body 1 and the roller shaft 15.

At that time, that is, when caulking the end of the roller body 1, the inner side surface 5 of the collar 4 of the roller body holding part 3 is inclined, and the end surface of the roller body 1, which is the outermost shell, is As it is bent inward by caulking, the inner side surface 5 also becomes inclined. That is, in response to the inward bending of the end surface of the roller body 1, the inner side surface 5 of the collar 4 of the resin roller body holding part 3 is bent to the cut end surface 1' of the roller body 1 by the pressing and caulking action of the caulking tool 100. The roller body 1 bulges and deforms, and its end surface gradually comes into close contact with the inner side surface 5 of the collar 4. When the caulking is finally completed, the end surface of the roller body 1 and the inner side surface 5 of the collar 4 are It will stick tightly.

On the other hand, when the inner side surface 5 of the collar 4 is formed vertically without being inclined, as described above,
When the end of the roller body 1 is bent inward and caulked, at the edge portion formed by the cut end surface 1' of the roller body 1 and the inner peripheral surface of the roller body 1, at the time of caulking, The bottom of the vertical portion of the collar 4 may be cut off and the collar 4 may fall off from the roller body holding portion 3, which is not preferable.

Therefore, the inclination angle of the inner side surface 5 of the collar 4 is set in such a manner that the inner side surface 5 of the collar 4 and the end surface of the roller body 1 come into tight contact when crimping is completed as described above. It is being formed.

In this way, the inner side surface of the collar 4 is inclined, and the end of the roller body 1 is caulked to form the roller body 1.
When the conveyor roller is assembled by bending it inward, the roller body attachment part 3 of the flanged axle box sealing member 2 and the inner circumferential surface of the roller body 1 are further brought into close contact, and the end surface of the roller body 1 and the flanges 4 are brought into close contact with each other. medial side 5
As a result, it completely prevents foreign substances such as moisture from entering the ends of the roller body 1 through these fitting parts, and also prevents rust, corrosion, etc. can be prevented.
A conveyor roller according to the present invention constructed in this way is illustrated in FIG.

Furthermore, as shown by the imaginary line in Figure 1,
The boss portions of the inner ring 18 and the protective cover 19 are
A retaining ring 20 may be disposed between the inner ring 9 of the ball bearing 7 and an outer retaining means, such as a mounting plate or retaining ring 20.

Furthermore, in order for the flange 4 to firmly adhere to the cut end surface 1' of the roller body 1, the roller body 1 is formed of a steel pipe as described above, and even if the cut end surface 1' remains cut. Therefore, even if no anti-rust treatment such as painting is applied, the end face can be prevented from becoming abnormally rusty when the conveyor roller is assembled.

The flanged axle box seal member 2 attached to the roller body 1 and the shaft 15 as described above includes:
As shown in FIG. 1, an uneven passage (labyrinth) L is formed in cooperation with the annular flange 13 of the sealing member 2 to prevent foreign matter from entering from the outside through the bearing 7. , an inner ring 18 having a complementary shape to the annular flange 13 of the seal portion 2;
will be provided. Furthermore, a protective cover 19 can be disposed outside the bearing seal member 2 to protect the outer surface 17 of the flanged axle box seal member 2.
Since the boss portions of the inner ring 18 and the protective cover 19 are closely fitted to the roller shaft 15, foreign matter is completely prevented from entering the ball bearing 7 through these attachment portions.

Since the conveyor roller according to the present invention is constructed and operates as described above, the tubular roller body, which has been cut to a predetermined length, is coated on the cut end surface to prevent the occurrence of rust, etc. It can be used as is without any anti-corrosion treatment, and special processing has been applied to the roller body to prevent the axial movement of the roller body holding part and to position it at a predetermined position within the roller body. Therefore, the number of processing steps can be reduced.
To provide an extremely simple conveyor roller that is easy to manufacture and assemble, is inexpensive, and has good sealing properties to completely prevent foreign matter from entering the roller from the outside.

In the conveyor roller according to the present invention, the outer peripheral surface 22 of the flange 4 is colored, or the flange-equipped shaft box seal member 2 is colored.
An annular colored zone can be formed at the end of the conveyor roller by molding it with a colored resin of a specific color, for example white, yellow or red.
Such an annular colored zone is extremely effective in checking the running condition of the belt.

For example, when the conveyor roller according to the present invention is used in a belt conveyor in which a belt is supported by three rollers as shown in FIG. The difference in distance between the belt and the colored zone 22 of each roller can be clearly determined simply by visual recognition, and the operator can immediately grasp the meandering state of the belt.

Furthermore, the colored edges of the conveyor rollers also serve as a danger sign when approaching a running conveyor.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical sectional view of a conveyor roller according to the present invention. FIGS. 2 to 4 are schematic diagrams illustrating the steps for manufacturing and assembling the conveyor roller shown in FIG. 1. FIG. 5 is a schematic cross-sectional view of three conveyors. Figure 6 shows the fifth
FIG. 3 is a partial schematic plan view of the conveyor shown in the figure; 1: Roller body, 2: Flange axle box seal member,
3: Roller body holding part, 4: Annular collar, 7: Bearing,
10: bearing holding part, 12: annular rib, 15: shaft.

Claims (1)

[Claims for Utility Model Registration] 1. A bearing holding part 10 that holds a bearing 7 on an inner peripheral part formed in a generally cylindrical shape, and a ring-shaped rib 12 surrounding the bearing holding part 10 concentrically. a roughly cylindrical roller main body holding section 3 connected to the bearing holding section 10; and a larger diameter annular collar 4 formed at the outer end of the roller main body holding section 3.
The annular collar 4 is formed so that the inner side surface 5 has a predetermined inclination angle θ toward the outer side surface 6 of the annular collar 4 with respect to the roller shaft 15 inserted into the bearing 7. The flanged shaft box sealing member 2 made of resin is attached to the end portion 1 of the cylindrical roller body 1.
6, the annular collar 4 is fitted until the inner side surface 5 comes into contact with the cut end surface 1' of the roller main body 1;
Next, the end portion 16 of the roller body 1 is bent inward together with the roller body holding portion 3, thereby fixing the flanged axle box sealing member 2 to the roller body 1, while the flanged The bearing, in which the outer ring 8 of the bearing 7 is held in the axle box sealing member 2, has its inner ring 9 attached to the roller shaft 15 so that the roller body 1 can rotate around the roller shaft 15;
Further, an inner ring 18 and a protective cover 19 are disposed adjacent to the inner ring 9 of the bearing 7, so that the inner ring 18 and the outer end of the bearing holding portion 10 of the flanged axle box sealing member 2 are A conveyor roller characterized in that a labyrinth is formed by cooperating with an annular flange 13 formed to protrude a predetermined length toward the roller shaft 15. 2. The conveyor roller according to claim 1, wherein at least the outer surface of the flange 4 of the flanged axle box sealing member 2 is colored in a color different from that of the roller body 1.