JPH07277437A - Conveyor belt - Google Patents

Abstract

PURPOSE:To provide a conveyor belt for a cylindrical belt conveyor less in lowering rigidity due to repeated bending and temperature and excellent in durability by burying a plural number of roughly U shaped wires in the belt longitudinal direction in at least one of covering rubbers on the front and the back. CONSTITUTION:A plural number of wires 8 showing a roughly U shape are buried along the whole length of a belt in a front covering rubber 6 and a back covering rubber 7. An interval between each of wires 8 is at an equal pitch. As the buried wires 8 are U shaped and symmetrical, they have no directionality and have no worry to meander to either of the left and right at the time of travelling. Additionally, it is possible to uniformize rigidity in the cross direction in the longitudinal direction of the belt by uniformizing the pitch between each of the wires 8. It is possible to change rigidity in the cross direction by selecting the U shape, that is, by changing the width (b) of the bottom part of the U letter and a left and right expansion angle (e).

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a conveyor belt,
More specifically, the present invention relates to a conveyor belt used for a cylindrical belt conveyor that bends into a cylindrical shape and conveys an object.

[0002]

2. Description of the Related Art Generally, a cylindrical belt conveyor is designed to prevent a spillage, scattering, and leakage during transportation, and to prevent a steep slope transportation in order to transport the goods while sealing them in a cylindrical shape. The conveyor has attracted attention in recent years because it is possible and has advantages such as a small installation area due to its cylindrical shape and is excellent in economic efficiency.
For example, a typical one of this type of cylindrical belt conveyor has a structure as shown in FIG.
The endless belt 3 suspended between the individual pulleys 1 and 2 is flatly developed at the pulley 1 and one surface 3a of the endless belt 3 is bent into a cylindrical shape to convey an object, and the other pulley 2 By the way, the object is conveyed by unfolding the belt again and rotating the pulley 2 and then bending the other surface 3b of the endless belt 3 into a cylindrical shape. FIG. 6 is a sectional view of the support frame 4 or 5 in FIG.

As a conveyor belt used for this cylindrical belt conveyor, Japanese Patent Laid-Open No. 63-218415 has a bias cut reinforcing layer and a woven weave reinforcing layer between an inner rubber layer and an outer rubber layer. Further, there is disclosed a conveyor belt having an outer rubber layer fastened with a fastening cloth. Further, in Japanese Patent Publication No. H05-500939, two woven fabric layers are provided in an intermediate portion covered with an upper rubber layer and a lower rubber layer, and a plurality of wire rods are embedded in the longitudinal direction near the end portions. A conveyor belt is disclosed.

However, none of the conveyor belts disclosed in the above publications has sufficient lateral rigidity, and the rigidity is remarkably reduced when repeatedly bent or when a high-temperature object is conveyed, and the conveyor belt has a long rigidity. It may not be able to withstand long-term use and may not achieve the planned haulage.

The present invention has been made in view of the above problems of the prior art, and an object thereof is a conveyor for a cylindrical belt conveyor which is excellent in durability and has little deterioration in rigidity due to repeated bending and temperature. To provide a belt.

[0006]

In order to achieve the above-mentioned object, the gist of the present invention is to develop an endless belt suspended between two pulleys which are spaced apart at a constant interval between the two pulleys, A cylindrical shape configured to bend one side of an endless belt into a cylindrical shape to convey an object, and circulate the other pulley, and then bend the other side or the same side of the endless belt into a cylindrical shape to convey an object. A conveyor belt used for a belt conveyor, characterized in that a plurality of substantially U-shaped wires are embedded in the longitudinal direction of the belt in at least one of the front and back cover rubbers. In the above first invention,
A second invention is a conveyor belt characterized by using a wire having a bias shape in place of the wire having a substantially U shape.

As the wire, it is preferable to use a stranded wire which is excellent in bending fatigue.

[0008]

The lateral rigidity of the cover rubber is improved by embedding the wire in the cover rubber along the longitudinal direction of the belt so as to have a substantially U-shape or by burying the wire in a bias shape.

[0009]

EXAMPLES Examples of the present invention will be described below. Figure 1 (a)
(b) shows a structure in which a plurality of substantially U-shaped wires 8 (stranded wire, having a diameter of 0.80 mm) are embedded in the front cover rubber 6 and the back cover rubber 7 over the entire length of the belt. The wires 8 are arranged at equal pitches (6.0 mm). The thickness of the core body 9 (see FIG. 2) of this conveyor belt is 4.4 m.
m, and the thicknesses of the front and back cover rubbers 6 and 7 including the wire 8 are both 7.5 mm.

In this case, since the buried wire has a U-shaped symmetry, there is no directivity and there is no possibility of meandering to the left or right when traveling. Further, by making the pitches of the respective wires equal, the lateral rigidity in the longitudinal direction of the belt can be made uniform, but the lateral rigidity can be changed by selecting the U-shape. it can. That is, the rigidity can be changed by changing the width (b) of the bottom of the U character and the spread angle (θ) on the left and right. Further, the shorter the wire pitch is, the more the lateral rigidity is improved. However, practically, the wire pitch may be 2.0 mm or more, while the pitch is 1 mm or less.
Those having a thickness of more than 0.0 mm have low durability.

Further, if the wire diameter is thick, the rigidity can be increased, but if the wire diameter is too thick, it is difficult to form a cylindrical shape. Therefore,
The wire diameter is preferably 0.35 to 1.45 mm, and the pitch thereof is preferably 2.0 to 10.0 mm.

As shown in FIGS. 1 (a) and 1 (b), when both wires are embedded in the front and back cover rubbers, when used as a cylindrical conveyor belt, the upper conveyance position of FIG. The front cover rubber surface can be used as the transport surface, and the back cover rubber surface in FIG. 1 (b) can be used as the transport surface at the lower transport position. Further, when the wire is embedded only in one of the front and back cover rubbers, in order to use the same surface on the side where the wire is embedded in the upper transport position and the lower transport position as the transport surface, the drive pulley of FIG. If a guide roller is provided in the vertical direction between the roller 2 and the roller 10 at a position corresponding to approximately the center in the width direction of the pulley, and the guide roller presses the side opposite to the conveying surface. Good.

FIGS. 3 (a) and 3 (b) show another embodiment, showing a case in which a plurality of wires 8 are embedded in the front and back cover rubbers 6 and 7 in a bias shape over the entire length of the belt. The wire diameter is 0.8 mm, and the wire pitch is 6.0 mm. The cross section is similar to that of FIG. 2, and the thickness of the core body 9 and the front and back cover rubbers 6 and 7 is the same as that of FIG. In this case, in order to change the rigidity value in the lateral direction, the oblique angle θ may be changed. Also, as in the case of the U-shaped wire, considering the durability and the cylindrical shape, the wire diameter is 0.35 to
The pitch is 1.45 mm, and the pitch is 2.0 to 10.0 mm
Is preferred. In the belt shown in FIGS. 3 (a) and 3 (b), the wire embedding direction is upward to the right with respect to the traveling direction (arrow A), and this belt tends to move to the right when traveling, so the cylindrical shape of the belt is 4 in the upper transport position of FIG.
As in (a), and in the lower transport position of FIG.
It is preferable to use (b). This belt has a tendency to expand in the direction of arrow B. By forming the cylindrical shape of the belt as described above, the belt deviating direction C is offset from the expanding direction of the belt. Because it will be. Even in this case, as described above, if the wire arrangement and the cylindrical shape of the belt are combined so that the belt deviating direction and the belt unfolding direction are canceled, the wire can be attached to only one of the front and back cover rubbers. It can be buried.

[0014]

According to the present invention, it is possible to provide a conveyor belt for a cylindrical belt conveyor, which is less durable in repeated bending and temperature and has excellent durability.

[Brief description of drawings]

1 (a) and 1 (b) are views showing a state in which a cover rubber on a front surface and a back surface of a conveyor belt of the present invention is partly peeled off to expose a wire embedded in a substantially U shape. is there.

2 is a cross-sectional view of the conveyor belt of FIG.

FIGS. 3 (a) and 3 (b) are views showing a state in which a cover rubber on a front surface and a back surface of a conveyor belt of the present invention is partly peeled off to expose a wire buried in a bias shape.

FIG. 4 is a sectional view of a cylindrical conveyor belt.

FIG. 5 is a diagram showing an overall configuration of a cylindrical belt conveyor.

6 is a sectional view of a portion of support frames 4 and 5 in FIG.

[Explanation of symbols]

 1, 2 ... Pulley 3 ... Endless belt 4, 5 ... Support frame 6 ... Front cover rubber 7 ... Back cover rubber 8 ... Wire 9 ... Core 10 ... Roller

Claims (2)

[Claims] 1. An endless belt suspended between two pulleys at regular intervals is flatly deployed at both pulleys,
A cylinder configured to convey an object by bending one surface of the endless belt into a cylindrical shape and rotating the other pulley, and then bending the other surface or the same surface of the endless belt into a cylindrical shape. What is claimed is: 1. A conveyor belt for use in a belt conveyor, wherein a plurality of substantially U-shaped wires are embedded in a longitudinal direction of the belt in at least one of the front and back cover rubbers. 2. A conveyor belt, wherein a wire having a bias shape is used in place of the wire having the substantially U-shape according to claim 1.