JPS6132893Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cam type brake device for a chain with rollers in which side rollers or top rollers are attached to a conveyor chain.

A chain with rollers supports and transports articles on side rollers or top rollers, but since the rollers are in rolling contact with the bottom surface of the article, the article experiences only a small amount of resistance when it touches the conveyor guide. There is an inconvenience that even when you receive it, it becomes stagnant. Conventionally, therefore, it has been common practice to apply some braking force to the rollers to add sliding frictional contact to the rolling contact, thereby increasing the article transporting force and preventing the stagnation. However, in the past, a brake device was provided on the rollers to achieve sliding frictional contact, which resulted in problems such as a complicated structure and a large chain width.

The object of the present invention is to propose a cam-type brake device for a chain with rollers that does not have the above-mentioned problems and can be immediately switched to a sliding friction contact state by a slight resistance force.

The illustrated embodiment of the present invention will be explained below.1
is a top roller chain in which the top roller is replaced with a brake cam 2 having a shape in which one half of the roller protrudes in the radial direction at each desired chain pitch. The cam 2 can be made of metal, synthetic resin, rubber, etc., and is formed from a circular cam surface 3 having the same diameter as the top roller, passing through straight cam surfaces 4, 4 to a small diameter circular cam surface 5.
It has a cam surface that extends to .

As shown in FIG. 1, the cam surface 5 of the cam 2 is normally located downward due to its own weight, and the article 6 is placed on the cam surface 3 for transport. When the article 6 is subjected to some kind of resistance force and its speed decreases, the cam 2 rotates in the direction of the arrow due to the frictional force with the article, and the linear cam surface 4 touches the bottom surface of the article (Fig. 2), causing the cam 2 to rotate further in the direction of the arrow (Fig. 2). Since the rotation of the article 6 is prevented, the article 6 overcomes the resistance force due to the sliding friction force with the cam surface 4 and is transported without being stagnant. If an external force such as a manual push is applied to the article 6 in the state shown in FIG. 2, it will slip and be transported again in the state shown in FIG. 1.

According to the present invention, the sliding friction allows the article to be transported along a slight upward slope. FIG. 3 shows a brake cam 2a in which linear cam surfaces 4a, 4a are formed on both sides of a circular cam surface 3, and a small diameter circular cam surface 5a is formed at the outer end thereof. This cam 2a operates with good responsiveness during transfer in both directions.

FIG. 4 shows a brake conveyor 7 equipped with a cam 2.
This shows an application example of the present invention in which the conveyor 7 is driven at the same speed as the chains 1 and 1, and the conveyor 7 is arranged between two chains 1 and 1 with normal rollers at a pitch smaller than the length of the transported object, for example, a pallet.
This is advantageous in that the brake cam, once in a sliding friction state, can be quickly returned to a rolling contact state.

The present invention has the above-mentioned configuration, and has the advantage that the structure is extremely simple and the chain width is not increased.

[Brief explanation of the drawing]

Fig. 1 is an elevational view of one embodiment of the present invention, Fig. 2 is an elevational view of the brake cam when the brake is activated, Fig. 3 is an elevational view of the brake cam of another embodiment, and Fig. 4 is an applied example. be. 1... Chain with rollers, 2, 2a... Brake cam, 3, 3a... Circular cam surface, 4, 4a...
Straight cam surface.

Claims (1)

[Scope of utility model registration request] A brake cam having a linear cam surface protruding in the tangential direction from a circular cam surface having the same diameter as the roller with an arbitrary pitch at the roller mounting position of the chain with rollers is freely rotatably supported at the center of the circular cam surface. A chain cam type brake device with rollers.