JPS6122893Y2 - - Google Patents

Description

[Detailed Description of the Invention] -Field of Industrial Application- This invention relates to the structure of a belt conveyor roller having a self-aligning function.

-Problems with the Prior Art- Conventionally, rollers for belt conveyors with a self-aligning function include rollers having a spiral protrusion extending toward the center of the conveyor on the circumferential surface of a right cylindrical roller; A truncated conical roller with a smooth circumferential surface was used. A roller with a spiral protrusion on its circumferential surface causes the belt to move due to the difference in lateral thrust applied to the belt by the spiral protrusion when the conveyor belt deviates from the center of the roller device. The device is designed to return to the center of the roller device, and the truncated conical roller is pivoted symmetrically with the large diameter side of the roller inside a support frame that is rotatable around the vertical axis. When the belt is biased, the moment generated by the difference in circumferential speed between the inside and outside of the roller on the biased side causes the support frame to rotate around the vertical axis, causing the axis of the roller to move relative to the belt. This method attempts to return the belt to the center line by utilizing the fact that thrust toward the center is applied to the deviated belt. Furthermore, as a roller having a self-aligning function, a drum-shaped roller is formed with semicircular tooth-shaped protrusions spirally formed on both sides of the roller except for the center part (Jikkosho). 51-35831). However, such conventional self-aligning roller devices do not have sufficient functionality, and conventional rollers are formed by molding cast iron, steel, or neoprene rubber to form the above-mentioned ridges or conical peripheral surface. As a result, the manufacturing cost was extremely high, and the ridges had the disadvantage that mud and other particles adhered to their circumferential surfaces, making it impossible for the protrusions to function adequately.

In addition, a roller has been proposed in which a flange member is provided on the roller shaft and a coil formed of steel wire is mounted between the flange members, but the roller circumferential surface formed by the coil is conical. Not only is it difficult to form the coil into a conical shape, but in such a structure, the coiled wire may deform when an excessive external force is applied to the roller. The disadvantage is that it becomes unusable.

This invention improves the drawbacks of the conventional conveyor rollers mentioned above, has a sufficient self-aligning function, does not cause clogging due to adhesion of mud, can be manufactured at low cost, and The object of the present invention is to obtain a durable roller for a belt conveyor.

- Means for Solving the Problems - Explaining using the reference numerals in the drawings, the roller for a self-aligning belt conveyor according to the present invention has a plurality of wedge-shaped steels on the circumferential surface of a right cylindrical roller base 2. The pieces 3 and 4 are fixed in the radial direction, and the wedge-shaped steel pieces 3 and 4
A steel wire 5 is spirally wound and fixed on the outer sides 3a, 4a of the steel wire 5.

-Function- The rollers 6, 7 according to the present invention have wedge-shaped steel pieces 3, 4 radially fixed to a right cylindrical roller base 2, and steel wires 5 are screwed onto the outer sides 3a, 4a of the steel pieces 3, 4. A roller 6 that is wound and fixed in a linear shape and has a truncated conical shape as a whole.
7, the supporting frame is caused by the moment caused by the lateral propulsion force by the spiral steel wire 5 and the speed difference between the large diameter side and the small diameter side of the truncated conical rollers 6 and 7. Due to the synergistic effect with the rotational force of the roller, it has a superior self-aligning function compared to conventional rollers. Further, since a gap is formed between the spiral steel wire 5 and the right cylindrical roller base 2 by the wedge-shaped steel pieces 3 and 4, the spiral steel wire 5 can be peeled off from the conveyor belt 11. Mud lumps do not accumulate on the roller circumferential surface and quickly fall off, preventing clogging.
There is no need to bury the steel wire 5 in mud and the self-aligning action of the spiral protrusion will be lost.Furthermore, there is no need to taper the peripheral surface of the roller base, so the entire device can be manufactured at low cost. can.

-Example- The following description will be made based on the embodiments shown in the drawings.

3 and 6 show the first roller of the present invention.
This figure shows an embodiment and a second embodiment, and each figure a is a front view, and each figure b is a side view seen from the large diameter side. In the figure, 1 is a roller shaft, 2 is a right cylindrical roller base supported on the roller shaft 1 via a bearing (not shown), and 3...3, 4...4 are radially fixed on the circumferential surface of the roller base 2. In the illustrated embodiment, four wedge-shaped steel pieces are attached. Reference numeral 5 denotes a steel wire that surrounds the wedge-shaped steel pieces 3...3, 4-4, and is wound and fixed thereto in a spiral manner. The roller shown in the third figure uses a wedge-shaped steel piece 3 having a straight inclined edge 3a, and the substantial roller peripheral surface formed by the steel wire 5 has a truncated conical shape. The illustrated roller uses a wedge-shaped steel piece 4 having a concave slanted edge 4a, so that the substantial circumferential surface of the roller has a convex truncated cone shape.

1 and 2 show a roller device constructed using the roller 6 of FIG. 3,
The rollers 6a and 6b of this invention are arranged symmetrically so that their large diameter sides are inward and their upper end meridians are horizontal, and are mounted on a support frame 8.
is attached to the base frame 10 with a pin 9 so as to be rotatable about the vertical axis. The steel wires 5 of the rollers 6a and 6b are wound in spirals in opposite directions, so that when the conveyor belt 11 runs on the rollers 6a and 6b, the belt 11 has a lateral direction toward the center line of the conveyor. (See FIG. 2. Here, arrow A is the running direction of the conveyor belt 11, and arrow B is the direction of the thrust acting from the rollers 6a and 6b.)

As shown in FIG. 1, the roller 6 shown in FIG. 3 is used to support the conveyor belt 11 in a flat state, and the belt 11 supported by the rollers 6a and 6b has screw threads. Lateral thrusts B and B act from the linear steel wires 5 toward the center of the conveyor, and when the belt 11 deviates from the center, a difference in force occurs between the lateral thrusts acting from the rollers 6a and 6b, and this force This difference causes the belt 11 to return to the center. At the same time, as shown in FIG. 2, when the belt 11 is biased and comes to the position 11a, the difference in circumferential speed between the large diameter side and the small diameter side of the roller 6b on the biased side generates a moment due to frictional force. At least this moment causes the support frame 8 to rotate around the pin 9 as shown in the second figure, and the rollers 6a, 6b
The axes 12a and 12b of the belt 11 are oblique, and the belt 11
to return to its center line. That is,
When using the rollers 6a and 6b of this invention,
The restoring force due to the spiral thrust B and the restoring force due to the rotation of the support frame 8 act synergistically, and it is possible to provide the belt 11 with an extremely good self-aligning function.

4 and 5 show a roller device constructed using the roller 7 shown in FIG. 6. As is clear from FIG. It is used when transporting. Here 13 is support frame 1
The rollers 7a and 7b of this invention are installed in an inclined manner with their large-diameter upper edges connected to the upper edge of the intermediate roller 13. rollers 7a, 7b
The rollers 7a and 7b are mounted with the large diameter side inward, and the helical directions of the steel wires 5 of the rollers 7a and 7b are opposite to each other. The self-aligning function for the belt 11 is also achieved by the same action as that shown in the first figure. The reason why the wedge-shaped steel piece 4 of the rollers 7a, 7b is formed with a concave convex roller surface is that the contact line between the rollers 7a, 13, 7b and the conveyor belt 11 is formed into a smooth curve.
This is to prevent the bent portion 11a of the belt 11 from separating from the rollers 7a, 7b, and thereby effectively exerts a self-aligning action on the belt 11 bent into a concave groove shape.

-Effects of the invention- As described above, by using the rollers 6 and 7 of the invention, it is possible to construct a roller device having an extremely good self-aligning function. Since it can be manufactured by fixing the wedge-shaped steel piece 3 or 4 and winding and fixing the steel wire 5 on the outside thereof, it can be manufactured at an extremely low cost. Furthermore, mud clods and the like adhering to the rollers 6 and 7 quickly fall off from between the steel wires 5, so there is no risk that the function of the roller device will deteriorate. Since the steel wires 5 are held at short intervals, there is no risk that the steel wires 5 will be deformed by external forces, and they have various excellent features such as excellent durability.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of this invention, in which FIG. 1 is a front view showing a roller device constructed using the roller of this invention, and FIG.
The figure is a plan view thereof, and FIG. 3 is a diagram showing the roller of this invention. 4 to 6 show a second embodiment of this invention, in which FIG. 4 is a front view showing a roller device constructed using the roller of this invention, and FIG. 5 is a plan view thereof. , FIG. 6 is a diagram showing the roller of this invention. In addition, Figures 3 and 6
In the figure, a is a front view, and b is a side view seen from the large diameter side. In the figure, 1 is the roller shaft, 2 is the roller base, 3, 4
is a wedge-shaped steel piece, 3a and 4a are inclined edges, 5 is a steel wire,
6 and 7 are rollers of the present invention, 8 and 14 are support frames, 9 is a pin, 10 is a base frame, and 11 is a conveyor belt.

Claims (1)

[Scope of utility model registration request] A self-aligning belt conveyor consisting of a plurality of wedge-shaped steel pieces fixed in the radial direction on the circumferential surface of a right cylindrical roller base, and a steel wire spirally wound and fixed on the outside of the wedge-shaped steel pieces. roller.