JPH08208011A - Brake roller of roller conveyer - Google Patents

Abstract

PURPOSE: To prevent the carrier speed of an article, from being exctremely increased, which is gravitationally carried through a roller conveyer. CONSTITUTION: A brake device BS consisting of a permanent magnet 11 and a brake member 21, and a planetary gear mechanism 30 are built into the end part of a roller main body RL1. When the roller main body RL1 is rotated, the brake member 21 is relatively rotated against the permanent magnet 11 in such a way that the magnetic flux of the permanent magnet 11 is cut so that brake force due to eddy current can be generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller conveyor for transporting articles, and more particularly to a brake roller of the roller conveyor capable of effectively regulating a transportation speed of articles to be transported.

[0002]

2. Description of the Related Art A roller conveyor for conveying articles, in which a large number of long cylindrical conveyor rollers are attached to a frame like a ladder, is often used.

Since such a roller conveyor is constructed so that each conveyor roller smoothly rolls through bearings, unless a particular braking force is applied to the conveyor roller, the conveying speed of the article to be conveyed is increased. Oversized,
An excessive impact may be applied to the article at the final end, or the article being conveyed may fall off the conveyor and damage the article. Therefore, it is known that a brake roller that can apply an appropriate braking force is mixedly provided in the conveyor roller to regulate the maximum conveyance speed of the article. Note that a brake device for this purpose is generally a mechanical brake that mechanically presses a brake member against the surface of a brake roller to obtain a braking force by a frictional force acting between the two.

[0004]

In the prior art, there is a problem that it is difficult to keep the braking force constant because the brake member is worn out during use. Further, since the brake member is in sliding contact with the surface of the brake roller, the surface of the brake roller is likely to be damaged, the durability of the entire roller conveyor is not sufficient, and it is difficult to make the whole compact.

In view of the problems of the prior art, an object of the present invention is to install a non-contact type eddy current type braking device in a roller body together with a planetary gear mechanism for speed-up instead of a mechanical brake. It is an object of the present invention to provide a brake roller for a roller conveyor that can maintain a constant braking force, is compact in size, and can easily realize sufficient durability.

[0006]

The structure of the present invention for achieving the above object comprises a roller main body, a brake device incorporated in an end portion of the roller main body, and a planetary gear mechanism for speed-up, and a brake. The device is a combination of a permanent magnet and a brake member that is interlocked with the rotation of the roller main body and relatively rotates by cutting the magnetic flux of the permanent magnet. One of the permanent magnet and the brake member is the roller main body together with the input shaft of the planetary gear mechanism. The main point is to connect the output shaft of the planetary gear mechanism to the output shaft of the planetary gear mechanism.

[0007]

According to the structure of the invention, the brake device constitutes an eddy current type brake device by combining the permanent magnet and the brake member. That is, when the article passes over the surface of the roller body and the roller body rotates, the brake device can generate a braking force that suppresses the rotation of the roller body. One of the permanent magnet and the brake member rotates integrally with the roller body together with the input shaft of the planetary gear machine groove for speed-up, and the other is connected to the output shaft of the planetary gear mechanism. The generated braking force can be increased via the planetary gear mechanism. This is because the planetary gear mechanism can increase the relative rotation ratio between the permanent magnet and the brake member.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

The brake roller BR of the roller conveyor is
A brake device BS and a planetary gear mechanism 30 for speed-up are incorporated into one end of the roller body RL1 (FIGS. 1 and 3).
In addition, the roller conveyor RC is
Conveyor rollers FR, FR without brake device BS
, And the brake rollers BR and BR are mixed and assembled in a ladder shape.

The brake device BS is constructed by combining the permanent magnet 11 and the brake member 21 (FIG. 1),
It is composed of an eddy current type braking device. The permanent magnet 11 is formed in a ring shape, and is divided in the circumferential direction so that magnetic poles N, S, N, S ... Are formed on both end faces (FIG. 2). However, the permanent magnet 11 may be formed by circularly arranging a plurality of independent permanent magnets for each magnetic pole N, S, and the directions of the magnetic poles N, S are the same as those shown in FIG. The reverse is also possible.

The permanent magnet 11 is mounted on the inner surface of the roller body RL1 via a ring-shaped yoke 12 having a channel-shaped cross section (FIG. 1). The permanent magnet 11 has one end surface in contact with the yoke 12 and the other end surface facing the yoke 12 with a gap g. That is, the permanent magnet 11 and the yoke 12 form a magnetic circuit having a gap g.

The brake member 21 is a disc made of a non-magnetic metallic material. The brake member 21 is attached to the tip of the output shaft 33 of the planetary gear mechanism 30, and the gap g
Held in.

The planetary gear mechanism 30 is incorporated into the tip of the roller body RL1 via a spacer 22 which also serves as a cap. A bolt 24 penetrates the shaft center of the outer wall of the spacer 22 via a bearing 23, and the bolt 24 is fixed to the frame F. That is, the bolt 24 can rotatably support the roller body RL1 via the bearing 23 and the spacer 22. An auxiliary spacer 22a is fixed to the tip of the bolt 24, and the auxiliary spacer 22a is connected to the planetary gear mechanism 30.
Together, it is stored in the spacer 22.

The planetary gear mechanism 30 includes a ring gear 32a having internal teeth mounted on the inner surface of the spacer 22 and a ring gear 32.
The sun gear 32b arranged on the axis of a and the ring gear 3
2a, a planetary gear 32 that meshes with both the sun gear 32b
c, 32c ... The sun gear 32b
Is fixed to the output shaft 33, and the output shaft 33 rotatably penetrates the inner side wall of the spacer 22 via bearings 33a, 33a. In addition, the planet gears 32c, 32
c are rotatably mounted on the auxiliary spacer 22a.

A brake roller BR incorporating the brake device BS and a conveyor roller FR having no brake device BS are appropriately mixed to form a roller conveyor RC (FIG. 3), and the article K is gravitated via the roller conveyor RC. Consider the case of transportation (direction of arrow A in the figure).

When the article K passes over the brake roller BR, the roller body RL1 rotates via the bearing 23. Then, the yoke 12 mounted on the roller body RL1 rotates and the permanent magnet 11 rotates.

On the other hand, the brake member 21 is the spacer 2
2. By rotating the ring gear 32a integrally with the roller body RL1, the ring gear 32a rotates in the opposite direction to the roller body RL1 via the planetary gears 32c, 32c, ..., And the sun gear 32b, and the rotation speed thereof is that of the roller body RL1. Faster than. That is, the spacer 22 and the ring gear 32
Reference character a is an input shaft of a planetary gear mechanism 30 that rotates integrally with the roller body RL1, and the planetary gear mechanism 30 can drive the output shaft 33 holding the brake member 21 at an increased speed.

Therefore, the brake member 21 at this time
Can rotate relative to the permanent magnet 11 in the opposite direction in the gap g to cut off the magnetic flux of the permanent magnet 11. This is because the magnetic field generated by the permanent magnet 11 is formed in the gap g. Therefore, an eddy current is generated inside the brake member 21, and the brake member 21 can generate a braking force based on the eddy current on the roller body RL1. That is, the brake roller BR is
It is possible to effectively prevent the conveyance speed of the article K from becoming excessively high.

In the above description, the permanent magnet 11 and the brake member 21 can exchange the mechanical relative relationship. That is, the permanent magnet 11 and the yoke 12 are connected to the output shaft 33 of the planetary gear mechanism 30, and the brake member 21
Is mounted on the inner surface of the roller body RL1,
Can be rotated together with 1. At this time, the brake member 21 is supported in the roller body RL1 via an appropriate spacer and is held in the gap g.

[0020]

As described above, according to the present invention, the eddy current type braking device combining the permanent magnet and the braking member is incorporated in the roller body together with the planetary gear mechanism for speeding up the conveyance. When the roller body is rotated by an article, a braking force can be generated via the braking device, and the braking force at this time increases the relative rotation ratio between the permanent magnet and the braking member via the planetary gear mechanism. As a result, it can be made significantly larger than the case where one of the two is fixed, and it can be held constant for a long period of time, and the durability of the roller conveyor is not impaired. By incorporating it into the roller body, it has the excellent effect that it can be made extremely compact with the same shape as other conveyor rollers.

In addition, the braking force based on the eddy current is
Since it increases as the rotation speed of the roller body increases, it is essentially suitable for the purpose of preventing the conveyance speed of the conveyed article from becoming excessively high, and the predetermined performance of the roller conveyor can be stably maintained. There is also an effect.

[Brief description of drawings]

[Fig. 1] Vertical section assembly drawing

FIG. 2 is a plan view of a permanent magnet.

[Figure 3] Usage status explanatory diagram

[Explanation of symbols]

 RC ... Roller conveyor BR ... Brake roller RL1 ... Roller body BS ... Brake device g ... Gap 11 ... Permanent magnet 12 ... Yoke 21 ... Brake member 30 ... Planetary gear mechanism 33 ... Output shaft

Claims (2)

[Claims] 1. A roller main body, a braking device incorporated in an end portion of the roller main body, and a planetary gear mechanism for speed-up, wherein the braking device interlocks with a permanent magnet and rotation of the roller main body. , A brake member that cuts off the magnetic flux of the permanent magnet and rotates relative to each other, one of the permanent magnet and the brake member rotates integrally with the roller body together with the input shaft of the planetary gear mechanism, and the other one A brake roller for a roller conveyor, which is connected to an output shaft of a planetary gear mechanism. 2. The permanent magnet constitutes a magnetic circuit having a gap together with a yoke, and the brake member rotates relative to the permanent magnet within the gap. Brake roller for roller conveyor.