JPH0641928Y2 - Belt conveyor - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor used for carrying a conveyed product.

[0002]

2. Description of the Related Art It is common practice to connect a plurality of belt conveyors having endless belts between a head roller and a tail roller to each other to convey an article to a predetermined position. Generally, when a heavy load is carried by the belt conveyor, the tension acting on the belt increases, and the tension acts as bending stress for the head roller and tail roller located at both ends of the belt on the carrier side. When used, the roller bends,
Or it may be damaged. Therefore, in a belt conveyor used for carrying heavy objects, head rollers and tail rollers having large outer diameters are used.

[0003]

By the way, as shown in FIG. 4, in a belt conveyor for carrying heavy articles in which the roller diameters of the head roller and the tail roller are large, a plurality of belt conveyors A ₁ and A ₂ are connected to each other. When a conveyor line is formed by connecting to the front and rear conveyors, the distance L between the front and rear conveyors A ₁ and A _{2
If 1} becomes large and the length of the conveyed product becomes shorter than the interval L _1, there is a disadvantage that the conveyed product cannot be conveyed. Also, even if the length of the conveyed product is long, the conveyed product collides with the end portion on the receiving side of the succeeding belt conveyor A ₂ when transferring the conveyed product, and therefore, the conveyed product cannot be smoothly conveyed, and many In the case of the transported articles in which the corrugated cardboard sheets are stacked, troubles such as a load slippage due to an impact generated at the time of transfer and a pinching between connection portions of the belt conveyor occur.

This invention has a technical problem to solve the above-mentioned inconvenience and to make it possible to reduce the distance between the connecting portions of the belt conveyor so as to facilitate the transportation of the conveyed object.

[0005]

In order to solve the above problems, the present invention employs a structure in which a backup roller is in contact with at least one of the head roller and the tail roller.

[0006]

With the above structure, since the bending load acting on the roller due to the belt tension can be supported by the backup roller, the deformation of the roller can be prevented, and the roller having a small outer diameter is used. be able to.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, an endless belt 3 is stretched between a head roller 1 and a tail roller 2, and a carrier-side belt 3 a of the belt 3 is provided.
Are supported by the belt guide plate 4.

The return belt 3b folded back from the head roller 1 is guided by the guide roller 5, and is inserted from the guide roller 5 between the head roller 1 and the backup roller 6 in contact with the head roller 1. The backup roller 6 is rotationally driven by the motor 7 and moves the belt 3 in the arrow direction of FIG.

The return-side belt 3b pulled out from the backup roller 6 is brought into contact with a pair of take-up rollers 8a and 8b, and the take-up roller 8b.
Is passed between the tail roller 2 and the backup roller 9 in contact therewith, and is guided to the lower part of the outer periphery of the guide roller 10 to reach the tail roller 2.

Here, each of the backup roller 6 in contact with the head roller 1 and the backup roller 9 in contact with the tail roller 2 is a bending load applied to the head roller 1 and the tail roller 2 by the tension of the belt 3. Are arranged in the direction.

As described above, the head roller 1 and the tail roller 2 are brought into contact with the backup rollers 6 and 9, respectively, so that the head roller 1 and the tail roller 2 are brought into contact with each other.
The bending load acting on the backup rollers 6 and 8 can be received. Therefore, a head roller 1 and a tail roller 2 each having a small roller diameter can be used, and when such a roller is used, a plurality of belt conveyors are connected to each other to form a conveyor line. As shown in FIG. 2, the distance L ₂ between the connecting portions of the conveying surfaces of the front and rear conveyors becomes small, and as a result, the conveyed object can be smoothly conveyed.

In the embodiment shown in FIG. 2, the return side belt 3b is inserted between the head roller 1 and the backup roller 6 and between the tail roller 2 and the backup roller 9, but the way of applying the belt 3 is not limited to this. Not something that is done. For example, as shown in FIG. 3, the return-side belt 3b brought into contact with the lower outer periphery of the guide rollers 5 and 10
May be brought into contact with the upper periphery of the take-up rollers 8a and 8b. In this case, the guide roller 5 is rotated by the motor. In addition, if the belt is applied as shown in FIG. 2, the belt 3 is sandwiched between the head roller 1 and the backup roller 6, so that there is no slip between the backup roller 6 and the belt 3 driven by the motor 7. The belt 3 can be moved reliably.

[0013]

As described above, in the belt conveyor according to the present invention, at least one of the head roller and the tail roller is brought into contact with the backup roller, and the bending load acting on the roller due to the belt tension is backed up. Since the roller is used for receiving, a roller having a small roller diameter can be used as the roller.
Therefore, it is possible to reduce the interval between the connecting portions of the conveyor surfaces of the belt conveyors connected to each other, and it is possible to smoothly convey the conveyed object.

[Brief description of drawings]

FIG. 1 is a plan view of a belt conveyor according to the present invention.

FIG. 2 is a front view of the above.

FIG. 3 is a front view showing another embodiment of the above conveyor.

FIG. 4 is a front view showing a connection portion of a conventional belt conveyor.

[Explanation of symbols]

 1 Head roller 2 Tail roller 3 Belt 6, 9 Backup roller

Claims (1)

[Scope of utility model registration request] 1. A belt conveyor in which an endless belt is stretched between a head roller and a tail roller,
A belt conveyor, wherein at least one of the head roller and the tail roller has a small diameter, and a backup roller is brought into contact with the roller.