JPS5940324Y2 - Conveyor roller - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a conveyor roller.

Conventionally, conveyor rollers have been comprised of numerous parts to prevent moisture, wall dust, and other foreign matter from entering the interior of the roller, particularly the rotating bearing.

That is, in conventional conveyor rollers, the bearing box that holds the bearing on the inner periphery and the roller body (outer shell) is attached to the outer periphery is generally formed by pressing a steel plate or is made of cast metal. A sealing means is formed to prevent foreign matter from entering the bearing of the bearing box, and a sealing means for preventing foreign matter from entering the roller body through the attachment portion to the roller body on the outer periphery of the bearing box. A sealing means for preventing this is separately formed from a steel plate and/or resin or synthetic rubber.

In addition, the roller body is usually used as is by cutting a welded steel pipe into a predetermined length of the roller width, and in such cases, the roller body and the roller are A large gap is created between the outer peripheral mounting part of the bearing box and the main body, and it is extremely easy for foreign matter to enter the roller through this gap. The structure of the instrument became extremely complex.

For this reason, not only is it difficult to manufacture the roller, but the assembly is also complicated, making it unsuitable for mass production, and causing many failures, resulting in an increase in the price of the roller.

The present invention solves the various drawbacks of the conventional conveyor rollers described above, and is particularly characterized in that the bearing box and foreign matter intrusion prevention means of the conventional roller are integrally formed of synthetic resin.

Therefore, the main purpose of the present invention is to have a simple structure and easy manufacturing.
To provide a roller for a conveyor that is easy to assemble.

Another object of the present invention is to provide a simple conveyor roller that is lightweight and inexpensive.

The present invention will be described in detail below with reference to Examples.

The roller body 1 is made of steel and has a cylindrical shape, and positioning protrusions 2 are provided at predetermined positions on both ends thereof at several locations, for example three locations, aligned on the circumference, by, for example, press working.

The axle box seal member 3 attached to the end of the roller body 1 is integrally formed of synthetic resin, preferably 6-nylon.

The axle box seal member 3 has a circular axle box seal member mounting portion 5 whose outer circumferential portion has approximately the same diameter as the inner circumferential diameter of the roller body 1, and whose inner circumferential portion is a bearing, preferably a ball bearing 1.
The bearing holding portion 4°4' is formed into a substantially cylindrical shape to which the outer ring 12 of No. 0 is attached.

Further, the axle box seal member mounting portion 5 of the axle box seal member 3 is
A roller support part 6 that contacts the positioning protrusion 2 of the roller body 1 and provides a substantial support surface when the axle box seal member is attached to the end part 8 of the roller body; It has an outer peripheral seal edge 7 which is provided over the circumference and can be bent following the bending of the end portion 8 of the roller body 1 when the axle box seal member 3 is attached to the roller body 1.

Preferably, when molding the axle box seal member 3, the bearing 10 is held by the bearing holding parts 4, 4' of the axle box seal member 3 and molded integrally, as shown in FIGS. 1 and 2. be done.

The technique of integrally molding the bearing 10 into the axle box sealing member 3 in this way can be distantly related to the conventional technique generally referred to as cast injection molding, but it will be briefly explained with reference to FIG. .

Separate molds (molds) for injection molding (molds) ① and ② are provided and are combined at the mating surface A.

The mold (2) is provided with a shaft portion B into which the inner ring 11 of the bearing 10 is fitted, and the bearing 10 is mounted on the shaft portion B in advance.

Therefore, as is clear from FIG. 5, it is understood that the axle box sealing member 3 is defined by the pattern C of the mold ■, the pattern D of the mold ■, and the outer ring 12 of the bearing 10, and that no resin enters the inside of the bearing 10. There will be.

The injection gate E can be provided at any position, but
In this embodiment, it is provided on the mold (2) side.

When the molten resin is injected into the molds ■ and ■ from the injection port indicated by the arrow through the gate E, an axle box sealing member having the bearing 10 integrally cast therein as shown in FIG. 2 is formed. 3
is formed.

Of course, the axle box sealing member 3 has a shape that allows the bearing 10 to be inserted into the inner diameter of the bearing retaining portion 4', as shown in FIG. It can also be molded to a sufficient size.

The outer surface of the axle box seal member 3, that is, the outer peripheral seal edge 7
The outer surface 9 between the bearing holding portion 4' and the bearing holding portion 4' is formed into an uneven shape so as to bottom the uneven passageway 14 in cooperation with the inner surface of the T-H rule seal member 13, which will be described later.

As shown in FIG. 2, the axle box seal member 3, which is also integrally formed with the bearing as described above, is attached to the axle box seal member mounting portion in such a way that the uneven outer surface 9 is in the shape of a curved line. 5 is fitted onto the end portion 8 of the roller body 1, and the roller support portion 6 is inserted until the end portion hits the positioning protrusion 2.

At this time, the bearing 10, which is integrally molded with the axle box seal member 3 and held in the bearing retaining portions 4, 4', has its inner ring 11
is inserted into the roller body 1 by being fitted onto the shaft 15 arranged in advance inside the roller body 1, and the inner circumferential edge of the inner ring 11 is made to engage with a protruding pawl 16 provided on the shaft 15.

Next, the terminal portion 8 of the roller body 1 is indicated by the arrow a − in FIG.
It is bent inward as shown in a.

At this time, the thinner outer peripheral seal edge 7 of the axle box seal member 3 is forcibly bent inward by the bending of the end portion 8 of the roller body 1.

Then, firmly attach the axle box seal member 3 to the roller body 1.
and the shaft 15.

In addition, between the end portion 8 of the roller body 1 and the axle box seal member 3, the outer peripheral seal edge 7 is firmly in contact with the end portion 8 of the roller body, so that the external The intrusion of foreign matter from the inside is completely prevented.

The axle box sealing member 3 attached to the roller body 1 and the shaft 15 as described above forms an uneven passageway (labyrinth) in cooperation with the uneven outer surface 9 of the sealing member 3,
In order to prevent foreign matter from entering from the outside through the bearing 10, a sealing member 13 is provided which has an uneven inner surface 14 having a complementary shape to the uneven surface 9 of the sealing member 3. .

Since the outer seal member 13 is attached with the attachment boss portion 18 tightly fitted to the shaft 15, foreign matter is completely prevented from entering the bearing 10 through this attachment portion.

TaH1! The inner end of the mounting boss portion 18 of the I-seal member 13 contacts the outer ring 11 of the bearing 10, and the outer end of the mounting boss portion 18 is prevented from moving outward by a retaining ring (not shown) provided on the shaft 15. The retaining ring can also be omitted by being blocked or engaged with the mounting plate 20 as shown in FIG.

Furthermore, the axle box sealing member 3 is provided with a seam escape groove 22 in the mounting portion 5 for escaping the seam 21 of the welded steel pipe when a welded steel pipe is used for the roller body.

Thereby, the attachment portion 5 of the axle box seal member 3 and the end portion 8 of the roller body 1 can be brought into closer contact with each other more completely.

The seam relief groove 22 is located at the mounting portion 5 as shown in FIG.
It may extend over the entire width of the seal, or it may terminate just short of the outer peripheral sealing edge 7, as shown in FIG.

As a result, the thickness of the outer peripheral seal edge 7 can be reduced, and the end portion of the roller body 1 can be bent more easily.

Since the conveyor roller according to the present invention is constructed and operates as described above, it is possible to completely prevent foreign matter from entering into the roller from the outside, and the number of parts can be extremely reduced. This has the effect that assembly is easy and the price can therefore be reduced.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing one embodiment of a conveyor roller according to the present invention. FIG. 2 is a schematic explanatory diagram showing the manner of manufacturing and assembling the conveyor roller of FIG. 1. FIG. FIG. 3 is a sectional view showing another embodiment of the axle box sealing member for a conveyor roller according to the present invention. FIG. 4 is a partial sectional view showing another embodiment of the axle box sealing member for a conveyor roller according to the present invention. FIG. 5 is a schematic sectional view of a mold for explaining a method of molding an axle box seal member for a conveyor roller according to the present invention. The main parts of the diagram are as follows. 1: Roller body, 2: Positioning protrusion, 3: Axle box seal member, 4: Bearing holding part, 5: Mounting part, 6: Roller supporting part,
7: Outer peripheral seal edge, 22: Seam relief groove, 9: Uneven outer surface, 8: Roller body end, 10: Bearing, 11:
Inner ring, 12: Outer ring, 13: Tachi 11 seal member, 14:
Uneven passage.

Claims (3)

[Scope of utility model registration request] (1) It is made of synthetic resin and is integrally shaped into a roughly cylindrical bottom, the inner circumference of which serves as a bearing holding portion 4゜4' that holds the bearing 10, the outer circumference of which supports the metal roller body 1, and The roller body support part 6 for sealing and the outer peripheral seal edge 7 formed thinner than the support part 6 are protected from each other, and at least the roller body support part 6 is provided with a seam 21 of the roller body 1 for escaping. A synthetic resin axle box sealing member 3, which is a mounting portion 5 having an escape groove 22 formed therein, is fitted into the end portion 8 of the metal roller body 1, and then the end portion 8 is attached to the axle box sealing member. 3 is bent inwardly together with the outer peripheral seal edge 7 of the axle box seal member 3, thereby fixing the axle box seal member 3 to the roller body; 11 is the roller shaft 15
The roller body 1 is attached to the roller shaft 1.
furthermore, the surface 9 of the axle box sealing member 3 is formed in an uneven shape; it cooperates with the uneven outer surface 9 of the axle box sealing member 3 to form an uneven passageway 14; , a conveyor roller constructed by fitting a T-H rule sealing member 13 having an inner surface 17 in a complementary shape to the uneven outer surface 9 of the axle box sealing member 3 onto the roller shaft 15. (2) The conveyor roller according to claim 1, wherein the axle box sealing member 3 integrally holds the bearing 10 and has a bottom shape. (3) The conveyor roller according to claim 1, in which the relief groove 22 is provided over the entire width of the mounting portion 5.