WO2018185970A1

WO2018185970A1 - Conveyor belt

Info

Publication number: WO2018185970A1
Application number: PCT/JP2017/041646
Authority: WO
Inventors: 純宮島
Original assignee: 横浜ゴム株式会社
Priority date: 2017-04-04
Filing date: 2017-11-20
Publication date: 2018-10-11
Also published as: JP2018177388A; CN110461735A; JP6957942B2; CN110461735B

Abstract

The present invention minimizes damage caused by heat, reduces costs, and improves durability. This conveyor belt 10A is configured to include a core reinforcement layer 12, edge rubber layers 14, an upper surface cover rubber layer 16, a lower surface cover rubber layer 18, and a thermally conductive material 20. The thermally conductive material 20 is embedded in the edge rubber layers 14 along the lengthwise direction of the edge rubber layers 14. Heat received by the edge rubber layers 14 is conducted by the thermally conductive material 20 along the lengthwise direction of the edge rubber layers 14. The thermally conductive material 20 is formed from a material having higher thermal conductivity than a rubber material constituting the edge rubber layers 14. The thermally conductive material 20 has a linear shape extending linearly with a predetermined diameter and is formed from an elastically deformable metal wire 22.

Description

Conveyor belt

The present invention relates to a conveyor belt.

2. Description of the Related Art Belt conveyor devices are widely used for transporting transported objects such as coal, ore and earth and sand in mines, quarries, civil engineering construction sites, and the like.
The belt conveyor device includes a long frame, a conveyor belt stretched across both ends of the frame in the longitudinal direction, a plurality of guide rollers that support the conveyor belt, and a drive unit that runs the conveyor belt. Has been.
And the guide provided in the flame | frame is extended along the extension direction of a conveyor belt on both sides of the conveyance surface of a conveyor belt.
In such a belt conveyor device, the object to be conveyed is stacked at a position deviated from the center in the width direction of the conveyor belt, so that the running conveyor belt meanders.
When the conveyor belt meanders, the edge of the conveyor belt keeps in contact with the surrounding structure and a specific part of the guide of the frame for a long time, and the structure and the part of the guide contacted with the edge of the conveyor belt become hot due to frictional heat. Become.
If the conveyor belt stops running when the structure or guide is hot, the edge of the conveyor belt will come into contact with the hot part of the structure or guide, The edge temperature rises.
And heat may be transmitted to the conveyor belt from the edge portion in contact with the high temperature portion of the structure or guide, and the conveyor belt may be damaged by the heat.
In order to prevent damage to the conveyor belt due to such heat, a structure in which the entire conveyor belt is configured using a rubber composition having flame retardancy is provided (see Patent Document 1).

JP 2014-118459 A

However, a conveyor belt using a flame retardant rubber composition has the effect of suppressing heat damage, but tends to increase the material cost and is not high in wear resistance, ensuring durability. There is a disadvantage in doing.
The present invention has been made in view of such circumstances, and an object thereof is to provide a conveyor belt that is advantageous in reducing cost and improving durability while suppressing damage due to heat.

In order to achieve the above-mentioned object, the present invention provides an elastically deformable heat conduction formed of a material having a higher thermal conductivity than a rubber material constituting the conveyor belt at locations near both ends in the width direction of the conveyor belt. The member is embedded along the longitudinal direction of the conveyor belt.

According to the present invention, when the edge of the stopped conveyor belt is brought into contact with the high temperature portion of the structure or guide, when it stops, the high temperature portion of the structure or guide extends from the high temperature portion of the conveyor belt to the end of the conveyor belt in the width direction. Heat is transferred and this heat is transferred to the heat conducting member.
The heat transmitted to the heat conducting member is smoothly conducted in the extending direction by the heat conducting member and rapidly diffused.
Therefore, it is advantageous in suppressing a temperature rise at a local portion at the end in the width direction of the conveyor belt that is in contact with the high temperature portion of the structure or guide.
Therefore, it is possible to prevent the end of the width direction of the conveyor belt from being damaged, and to prevent the heat received by those portions from being transmitted to a wide range of the conveyor belt and damaging the conveyor belt. It will be advantageous.
In addition, compared to the conventional case where a conveyor belt is formed using a rubber composition having flame retardancy, a rubber composition that is inexpensive and excellent in durability can be used. This is advantageous in reducing costs and improving durability.

(A) is sectional drawing which fractured | ruptured the conveyor belt of 1st Embodiment in the surface parallel to the width direction, (B) is a top view of a conveyor belt. (A) is sectional drawing which fractured | ruptured the conveyor belt of 2nd Embodiment in the surface parallel to the width direction, (B) is a top view of a conveyor belt. (A) is sectional drawing which fractured | ruptured the conveyor belt of 3rd Embodiment in the surface parallel to the width direction, (B) is a top view of a conveyor belt. (A) is sectional drawing which fractured | ruptured the conveyor belt of 4th Embodiment by the surface parallel to the width direction, (B) is a top view of a conveyor belt. (A) is sectional drawing which fractured | ruptured the conveyor belt of 5th Embodiment in the surface parallel to the width direction, (B) is the BB sectional drawing of (A). (A) is sectional drawing which fractured | ruptured the conveyor belt of 6th Embodiment in the surface parallel to the width direction, (B) is a top view of a conveyor belt. (A) is sectional drawing which fractured | ruptured the conveyor belt of 7th Embodiment by the surface parallel to the width direction, (B) is a top view of a conveyor belt. (A) is sectional drawing which fractured | ruptured the conveyor belt of 8th Embodiment in the surface parallel to the width direction, (B) is BB sectional drawing of (A). (A) is sectional drawing which fractured | ruptured the conveyor belt of 9th Embodiment in the surface parallel to the width direction, (B) is a top view of a conveyor belt.

(First embodiment)
Hereinafter, a conveyor belt according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1A and 1B, the conveyor belt 10 </ b> A includes a core reinforcing layer 12, an ear rubber layer 14, an upper cover rubber layer 16, a lower cover rubber layer 18, and a heat conducting member 20. It is comprised including.
The core body reinforcing layer 12 includes a plurality of core materials 1202 and a coat rubber 1204 that covers the core materials 1202.
The core reinforcing layer 12 is a portion that supports the tensile load applied to the conveyor belt 10A and maintains the tension of the conveyor belt 10A.
The ear rubber layer 14 is disposed on both sides in the width direction of the core body reinforcing layer 12.
The ear rubber layer 14 is a portion that protects both sides in the width direction of the conveyor belt 10 </ b> A including the core body reinforcing layer 12.
The upper cover rubber layer 16 and the lower cover rubber layer 18 cover and sandwich the core reinforcing layer 12 and the ear rubber layer 14.
The upper surface cover rubber layer 16 is a portion on which an object to be conveyed is stacked and conveys the object to be conveyed, and the lower surface cover rubber layer 18 is a portion in contact with a plurality of rollers that support the conveyor belt 10A.
The core reinforcing layer 12, the ear rubber layer 14, the upper cover rubber layer 16, and the lower cover rubber layer 18 each extend with a certain width to constitute the conveyor belt 10 </ b> A.

The heat conducting member 20 is embedded in the ear rubber layer 14 along the longitudinal direction of the ear rubber layer 14.
The heat conducting member 20 conducts heat received by the ear rubber layer 14 in the longitudinal direction of the ear rubber layer 14.
For this reason, the heat conducting member 20 is formed of a material having a higher thermal conductivity than the rubber material constituting the ear rubber layer 14.
Further, the conveyor belt 10A is reversed on a roller having a predetermined radius at at least an upstream end and a downstream end in the conveyance direction of the object to be conveyed, and is curved on the predetermined radius. It is a material that is smoothly curved together with the rubber material constituting the ear rubber layer 14, and is formed in a shape that is smoothly curved.
In the present embodiment, the heat conducting member 20 has a linear shape extending linearly with a predetermined diameter, and is formed of a metal wire 22 that can be elastically deformed.
Two metal wires 22 are embedded at both sides in the thickness direction of the ear rubber layers 14 on both sides at intervals in the width direction of the ear rubber layers 14.
As a material of such a metal wire 22, various conventionally known metal materials such as steel, copper, and aluminum can be used.

Next, the function and effect will be described.
If the conveyor belt 10A meanders while the belt conveyor device is running and the edge of the conveyor belt continues to contact the surrounding structure or the guide of the frame of the belt conveyor, the structure or the guide will rub. High temperature locally due to heat.
In this state, when the conveyor belt 10A stops traveling and stops at a position where the edge of the stopped conveyor belt 10A is in contact with a location where the temperature of the structure or guide is high, the conveyor belt starts from the high temperature location of the structure or guide. Heat is transferred to the widthwise ends of the top cover rubber layer 16, the edge rubber layer 14, and the widthwise ends of the bottom cover rubber layer 18 that form the edge of 10A.
In this case, the heat transmitted to the ear rubber layer 14 from the high temperature part of the structure or the guide, and the edge rubber layer 14 from the width direction end of the upper cover rubber layer 16 and the width direction end of the lower cover rubber layer 18. The heat transferred to is smoothly conducted in the extending direction by the heat conducting member 20 embedded in the ear rubber layer 14 and diffused rapidly.
Therefore, the temperature rise at the local portions of the end portions in the width direction of the upper surface cover rubber layer 16, the ear rubber layer 14, and the end portions in the width direction of the lower surface cover rubber layer 18 in contact with the high temperature portion of the structure or guide Is suppressed.

Accordingly, it is possible to prevent the end portions in the width direction of the upper surface cover rubber layer 16, the ear rubber layer 14, and the end portions in the width direction of the lower surface cover rubber layer 18 from being damaged, and those portions are affected. This is advantageous in preventing the heat from being transferred to a wide area of the conveyor belt 10A and damaging the conveyor belt 10A.
Moreover, compared with the case where the conveyor belt 10A is comprised using the rubber composition which has a flame retardance conventionally, the core body reinforcement layer 12, the ear rubber layer 14, the upper surface cover rubber layer 16, and the lower surface cover rubber layer A rubber composition that is inexpensive and excellent in durability can be used as the rubber composition constituting No. 18, which is advantageous in reducing costs and improving durability.
Moreover, since the heat conductive member 20 can be comprised with cheap things, such as metal wires, it becomes more advantageous when aiming at cost reduction.
In addition, since the heat conducting member 20 has a linear shape extending with a predetermined diameter and can be elastically deformed, at a location where the transport direction of the transported object is changed, for example, at least in the transport direction of the transported object. The upstream end and the downstream end are smoothly curved and deformed together with the ear rubber layer 14, which is advantageous for smoothly running the conveyor belt 10A.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS.
In the following embodiments, the same parts and members as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted.
The conveyor belt 10B of the second embodiment is a modification of the first embodiment, and the heat conducting member 20 is composed of a steel cord 24 in which a plurality of wire strands 2402 are joined together. The point is different from the first embodiment.
In the present embodiment, the heat conducting member 20 is composed of a steel cord 24 in which three wire strands 2402 are twisted together.
One steel cord 24 is embedded in each of the ear rubber layers 14 on both sides, and is embedded along the longitudinal direction of the ear rubber layer 14 at the center in the thickness direction and the width direction of the ear rubber layer 14, respectively.
According to such 2nd Embodiment, the following effect is show | played besides the same effect as 1st Embodiment is show | played.
By adjusting the twist pitch of the wire strands 2402, the elongation of the heat conducting member 20 can be matched to the elongation of the plurality of core members 1202 of the core reinforcing layer 12 with respect to the tensile load. This is advantageous in avoiding a decrease in heat transfer performance.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS.
A conveyor belt 10C according to the third embodiment is a modification of the first embodiment, and the heat conducting member 20 is configured by a member 26 in which a plurality of metal wires are knitted in a net shape.
The effect similar to 1st Embodiment is show | played also by such 3rd Embodiment.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIGS. 4 (A) and 4 (B).
A conveyor belt 10D according to the fourth embodiment is a modification of the first embodiment, and is different from the first embodiment in that the heat conducting member 20 has a thin plate shape.
The thin plate 28 is formed with a predetermined thickness and width that can be elastically deformed, and is embedded in a central portion in the thickness direction and the width direction of the ear rubber layer 14 and extends along the longitudinal direction of the ear rubber layer 14. ing.
As a material of such a thin plate-like heat conducting member 20, various conventionally known metal materials such as steel, copper, and aluminum can be used.
Also in the fourth embodiment, the same effects as in the first embodiment are exhibited.

(Fifth embodiment)
Next, a fifth embodiment will be described with reference to FIGS.
A conveyor belt 10E according to the fifth embodiment is a modification of the second embodiment, and is similar to the first embodiment in that the heat conducting member 20 is formed of a steel cord 24. In the first embodiment, the heat conducting member 20 has a bent portion 30 that protrudes in one direction and the other in the thickness direction of the ear rubber layer 14 and is continuously formed in the longitudinal direction of the ear rubber layer 14. Is different. Specifically, the bent portion 30 is configured such that portions protruding in one thickness direction of the ear rubber layer 14 and portions protruding in the other are alternately arranged in the longitudinal direction of the ear rubber layer 14.
In the example shown in FIGS. 5 (A) and 5 (B), the case where the ear rubber layer 14 protrudes in a gate shape at one and the other in the thickness direction is shown, but the protruding shape is V-shaped or the like. Various known shapes may be employed.
According to the fifth embodiment, in addition to the same effects as those of the second embodiment, the following effects are achieved.

Since the heat conducting member 20 includes the plurality of bent portions 30, it is more advantageous for the heat conducting member 20 to be smoothly curved and deformed together with the ear rubber layer 14 at a location where the transport direction of the transported object is changed. Thus, it is more advantageous in smoothly running the conveyor belt 10A.
Further, by adjusting the shape of the bent portion 30, the elongation of the heat conducting member 20 can be matched to the elongation of the plurality of core members 1202 of the core reinforcing layer 12 with respect to the tensile load. This is advantageous in avoiding the deterioration of the heat transfer performance due to the cutting.
In the fifth embodiment, the case where the heat conducting member 20 is the steel cord 24 has been described. However, when the heat conducting member 20 is configured by the metal wire 22 as in the first embodiment, When the heat conductive member 20 is formed of a mesh-like member 26 as in the third embodiment, when the heat conductive member 20 is formed of a thin plate 28 as in the fourth embodiment In addition, by providing the bent portion 30, the same effect as the fifth embodiment can be obtained.

(Sixth embodiment)
Next, a sixth embodiment will be described with reference to FIGS.
The conveyor belt 10F of the sixth embodiment is a modification of the second embodiment, and is similar to the second embodiment in that the heat conducting member 20 is formed of a steel cord 24. The heat conducting member 20 is different from the second embodiment in that the heat conducting member 20 is spirally wound around the rotation center axis extending in the longitudinal direction of the ear rubber layer 14.
According to the sixth embodiment, in addition to the same effects as those of the second embodiment, the following effects are achieved.
It is more advantageous for the heat conduction member 20 to be smoothly curved and deformed together with the ear rubber layer 14 at a place where the conveyance direction of the object to be conveyed is changed, and more advantageous for smooth running of the conveyor belt 10F. .
Further, by adjusting the shape of the spiral, the elongation of the heat conducting member 20 can be matched with the elongation of the plurality of core members 1202 of the core reinforcing layer 12 with respect to the tensile load. This is advantageous in avoiding a decrease in heat transfer performance due to.

(Seventh embodiment)
Next, a seventh embodiment will be described with reference to FIGS.
A conveyor belt 10 </ b> G according to the seventh embodiment is a modification of the first embodiment in which a metal wire 22 is used as the heat conducting member 20.
In the seventh embodiment, metal wires 22 are embedded on both sides in the thickness direction on both sides in the width direction of the top cover rubber layer 16, and metal wires 22 are respectively placed on both sides in the width direction of the top cover rubber layer 16. Four 22 are embedded, and extend along the longitudinal direction of the upper cover rubber layer 16.
In addition, metal wires 22 are embedded in the center of the thickness direction at both sides in the width direction of the lower surface cover rubber layer 18 at intervals in the width direction, and the metal wires are respectively disposed on both sides in the width direction of the lower surface cover rubber layer 18. 22 is embedded two by two and extends along the longitudinal direction of the lower surface cover rubber layer 18.
According to the seventh embodiment, the same effect as that of the first embodiment can be obtained.
In the first to seventh embodiments, the heat conductive member 20 may be provided in at least one of the ear rubber layer 14, the upper cover rubber layer 16, and the lower cover rubber layer 18. Of course, these three layers are used. You may provide in all the layers.
Further, as the heat conducting member 20, a steel cord 24 in which a plurality of wire strands 2402 of the second embodiment are joined together, and a member in which a plurality of metal wires of the third embodiment are knitted in a net shape. 26, the thin plate 28 of the fourth embodiment, the heat conduction member 20 having a shape in which the bent portion 30 of the fifth embodiment is continuous in the longitudinal direction, and the heat conduction member having a spiral shape of the fifth embodiment. 20 may be used.

(Eighth embodiment)
Next, an eighth embodiment will be described with reference to FIGS.
The conveyor belt 10H of the eighth embodiment is a modification of the seventh embodiment in which the ear rubber layer 14 is not provided and a metal wire 22 is used as the heat conducting member 20.
In the eighth embodiment, as in the seventh embodiment, four metal wires 22 are embedded in both sides of the upper surface cover rubber layer 16 in the width direction, and the lower surface cover rubber layer 18 in the width direction. Two metal wires 22 are embedded on both sides, respectively, and extend along the longitudinal direction of the upper cover rubber layer 16 and the lower cover rubber layer 18, respectively.
The eighth embodiment can provide the same effects as those of the first embodiment.

(Ninth embodiment)
Next, a ninth embodiment will be described with reference to FIGS.
A conveyor belt 10I according to the ninth embodiment is a modification of the eighth embodiment.
In the eighth embodiment, metal wires 22 are embedded in both sides in the thickness direction at both sides in the width direction of the core body reinforcing layer 12, and metal wires are respectively embedded in both sides in the width direction of the core body reinforcing layer 12. Four 22 are buried.
According to the ninth embodiment, the same effect as in the eighth embodiment can be obtained.
In the eighth and ninth embodiments, the heat conducting member 20 may be provided in at least one of the core reinforcing layer 12, the upper cover rubber layer 16, and the lower cover rubber layer 18, and of course, these three layers. It may be provided in all layers.
Further, as the heat conducting member 20, a steel cord 24 in which a plurality of wire strands 2402 of the second embodiment are joined together, and a member in which a plurality of metal wires of the third embodiment are knitted in a net shape. 26, the thin plate 28 according to the fourth embodiment, the heat conduction member 20 having a shape in which the bent portion 30 according to the fifth embodiment is continuous in the longitudinal direction, and the heat conduction member having a spiral shape according to the sixth embodiment. 20 may be used.

In the above embodiment, the case where the heat conducting member 20 is configured using the metal wire 22 or the metal thin plate 28 has been described. However, the material constituting the heat conducting member 20 is a rubber constituting a conveyor belt. It is only necessary that the material has a higher thermal conductivity than the material and can be elastically deformed. It can be used.

10A to 10I Conveyor belt 12 Core reinforcing layer 14 Ear rubber layer 16 Upper cover rubber layer 18 Lower cover rubber layer 20 Thermal conductive member 22 Metal wire 24 Steel cord 2402 Wire strand 26 Member woven in a net 28 Thin plate 30 Bending portion

Claims

An elastically deformable heat conducting member formed of a material having a higher thermal conductivity than the rubber material constituting the conveyor belt is disposed along the longitudinal direction of the conveyor belt at locations near both ends in the width direction of the conveyor belt. Buried,
Conveyor belt characterized by that.
The conveyor belt includes a core reinforcing layer, a lower cover rubber layer and an upper cover rubber layer sandwiching the core reinforcing layer,
The heat conducting member is provided in at least one of the core reinforcing layer, the lower cover rubber layer, and the upper cover rubber layer.
The conveyor belt according to claim 1.
The conveyor belt includes a core reinforcing layer, ear rubber layers disposed on both sides in the width direction of the core reinforcing layer, a lower cover rubber layer and an upper cover rubber that sandwich the core reinforcing layer and the ear rubber layer. With layers,
The heat conducting member is provided in at least one of the lower cover rubber layer, the upper cover rubber layer, and the ear rubber layer.
The conveyor belt according to claim 1.
The heat conducting member is formed of a metal cord or a steel cord in which a plurality of wire strands are combined, a metal thin plate, or a member in which a metal wire is knitted in a net shape,
The conveyor belt according to any one of claims 1 to 3, wherein:
The heat conducting member is configured by alternately arranging portions protruding in one of the thickness directions of the conveyor belt and portions protruding in the other in the longitudinal direction of the conveyor belt.
The conveyor belt according to any one of claims 1 to 4, wherein:
The heat conducting member is formed in a shape extending spirally around a central axis extending in the longitudinal direction of the conveyor belt,
The conveyor belt according to any one of claims 1 to 3, wherein: