JP5895341B2 - Conveyor belt - Google Patents

Description

  The present invention relates to a conveyor belt, and more particularly to a conveyor belt capable of effectively using a core layer and a lower cover rubber layer.

  A normal conveyor belt has a structure in which a core layer that ensures tension is sandwiched between an upper cover rubber layer on which a transported article is placed and a lower cover rubber layer that comes into contact with a drive pulley, a roller, or the like. (For example, see Patent Document 1). In this conveyor belt, since the upper cover rubber layer is worn by contact with a conveyed product, it is the member most easily damaged. Therefore, even when the core layer and the lower cover rubber layer are not damaged, the entire conveyor belt is often replaced.

JP-A-7-189210

  An object of the present invention is to provide a conveyor belt capable of effectively using a core layer and a lower cover rubber layer.

The conveyor belt of the present invention that achieves the above object is a conveyor belt in which a core layer is interposed between an upper cover rubber layer and a lower cover rubber layer, and at least a part of the upper cover rubber layer is an outer annular body. , and the the outer annular body have become a state of being stacked in non-adhesive to the inner annular body consisting of outer annular body other than the belt components, the recess on the inner peripheral surface of the outer annular body in the longitudinal direction of the belt that they extend, in a state in which the inner annular body fitted in the recess, both sides of the belt width direction of the inner annular body, characterized in that a structure which is sandwiched by said outer annular body It is.

  According to the conveyor belt of the present invention, at least a part of the upper cover rubber layer is an outer annular body, and this outer annular body is laminated non-adheringly to the inner annular body composed of belt constituent members other than the outer annular body. Even when the upper cover rubber layer is damaged due to contact with an object or the like, only the outer annular body needs to be replaced, so that the core body layer and the lower cover rubber layer can be used effectively.

A concave portion extends in the belt longitudinal direction on the inner peripheral surface of the outer annular body, and the inner annular body is fitted in the concave portion. By doing so, the inner annular body is sandwiched from both sides in the belt width direction by the outer annular body and integrally driven to rotate, so that the transported object can be transported stably.

The contact surface between the outer annular body inner annular body, the belt may have the engaging portion is provided, its engaging portion, which are present at predetermined intervals in the longitudinal direction of the belt which are engaged with each other It is desirable to consist of a plurality of protrusions extending in the width direction. As a result, the outer annular body and the inner annular body are mechanically engaged and integrally driven to rotate, so that the transported object can be transported more stably.

It is desirable that the outer annular body has at least one reinforcing layer in order to withstand the load of the conveyed product and suppress the elongation of the conveyor belt during operation.

It is side sectional drawing of a belt conveyor. It is an assembly figure which consists of a section of the belt width direction of the conveyor belt which consists of a reference form of the present invention. It is a partial cross section figure of XX shown in FIG. It is an assembly drawing which consists of a cross section of the belt width direction of the conveyor belt which consists of another reference form of this invention. It is an assembly drawing which consists of a section of the belt width direction of the conveyor belt which consists of an embodiment of the present invention . It is an assembly figure which consists of a cross section of the belt width direction which shows the modification of the conveyor belt of FIG. It is an assembly figure which consists of a cross section of the belt longitudinal direction of the conveyor belt of FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows an example of a belt conveyor.

  The belt conveyor 1 is obtained by winding an endless conveyor belt 4 between a pair of driving pulleys 2 and a driven pulley 3. The conveyor belt 4 includes an organic fiber canvas or the like between an upper cover rubber layer 7 having a conveying surface 6 on which a transported article 5 is placed and a lower cover rubber layer 8 in contact with the driving pulley 2 and the driven pulley 3. It has a basic structure in which a core body layer 9 having a core body such as a plurality of steel cords aligned and an intermediate rubber layer 10 for the core body layer 9 to be in close contact with the upper cover rubber layer 7 are arranged. Yes. The core body layer 9 is a rubber layer in which the core body is covered with a coat rubber in order to enhance the adhesiveness with the upper cover rubber layer 7, the lower cover rubber layer 8, and the core body. Further, the intermediate rubber layer 10 has the same rubber composition as the upper cover rubber layer 7 and the lower cover rubber layer 8 which have higher physical strength and wear resistance than the coated rubber in order to protect the core layer 9 from external damage. It is preferable to form from. The conveyor belt 4 runs on rollers 11 installed at a predetermined interval in the belt longitudinal direction in the forward path and the return path.

In such a belt conveyor 1, as shown in FIG. 2, a conveyor belt 4 </ b> A according to a reference embodiment of the present invention has an upper cover rubber layer 7 as an outer annular body 12, and belt constituent members other than the outer annular body 12. A structure in which a core layer 9, a lower cover rubber layer 8, and an intermediate rubber layer 10 are formed as an inner annular body 13, and the outer annular body 12 and the inner annular body 13 are laminated without bonding through the intermediate rubber layer 10. It has become. In addition, it is preferable to provide ear rubber 14 in advance at both ends of the core layer 9 in the belt width direction.

  When the transported object 5 is transported, the outer annular body 12 and the inner annular body 13 are rotated and driven between the driving pulley 2 and the driven pulley 3 by friction between the contact surfaces 15 and 16. When the transport surface 6 of the upper cover rubber layer 7 is damaged due to contact with the transported object 5, the outer annular body 12 may be separated from the inner annular body 13 and replaced. The cover rubber layer 8 can be used effectively.

  During normal operation, as shown in FIG. 3, the conveyor belt 4A travels on the roller 11 while being curved (troughed) downward. 6 near the center in the belt width direction. Therefore, in a state where the center positions in the belt width direction of the outer annular body 12 and the inner annular body 13 are matched, the width S of the outer annular body 12 is set to 60 to 100% of the width L of the inner annular body 13, more desirably 70. Make the size ~ 90%. By doing so, processing costs and member costs can be reduced, and the rigidity of the belt end portion can be lowered to improve the trough property of the conveyor belt 4A.

  When the width ratio (S / L) is less than 60%, the conveyed product 5 protrudes from the conveying surface 6 to cause wear and fatigue of the inner annular body 13, and the outer annular body 12 and the inner annular body 13. There is a risk that the transported material 5 may enter between the two. When the width ratio (S / L) exceeds 100%, the end of the outer annular body 12 in the belt width direction is likely to be damaged due to interference with a conveyor frame or the like.

  In addition, it is desirable to provide at least one reinforcing layer 17 in the outer annular body 12 in order to withstand the load of the transported object 5 and suppress the elongation of the conveyor belt 4A during operation. The reinforcing layer 17 can be formed from a canvas made of organic fibers.

Figure 4 shows a conveyor belt made from another reference embodiment of the present invention.

  The conveyor belt 4B includes a part including the conveying surface 6 of the upper cover rubber layer 7 as an outer annular body 12, and other parts of the upper cover rubber layer 7 which are belt constituent members other than the outer annular body 12. The core body layer 9, the lower cover rubber layer 8 and the intermediate rubber layer 10 are used as the inner annular body 13. The outer annular body 12 is non-adheredly fitted in a recess 19 formed in the belt longitudinal direction formed on the surface of the inner annular body 13.

  With such a structure, the outer annular body 12 is sandwiched from both sides in the belt width direction and is securely fixed to the inner annular body 13, so that the transported object 5 can be transported more stably. Moreover, since it becomes difficult for a foreign material to penetrate between the contact surfaces 15 and 16, the service life of the conveyor belt 4B can be extended.

In the conveyor belt 4 </ b> B, the width S of the outer annular body 12 is preferably larger than the width M of the recess 19 formed on the surface of the inner annular body 13. By doing so, the outer annular body 12 is clamped by the elastic repulsive force at both ends of the inner annular body 13 in the belt width direction and is securely fixed to the inner annular body 13, thereby improving the above effect. Can do.

Figure 5 shows an embodiment of the conveyor belt of the present invention.

  This conveyor belt 4C has a core body 9 and a lower cover rubber in a recess 20 extending in the longitudinal direction of the belt formed on the lower surface (surface which becomes the back side of the conveying surface 6) 18 of the upper cover rubber layer 7 which becomes the outer annular body 12. The inner annular body 13 composed of the layer 8 and the intermediate rubber layer 10 is detachably fitted.

  By doing in this way, since the inner side annular body 13 is clamped from the both sides of a belt width direction, and is reliably fixed with the outer side annular body 12, the conveyed product 5 can be conveyed more stably. Moreover, since it becomes difficult for a foreign material to penetrate between the contact surfaces 15 and 16, the service life of the conveyor belt 4C can be extended.

  In the conveyor belt 4 </ b> C, the width N of the recess 18 of the outer annular body 12 is preferably smaller than the width T of the inner annular body 13. By doing so, the inner annular body 13 is clamped by the elastic repulsive force at both ends of the outer annular body 12 in the belt width direction and is securely fixed to the outer annular body 12, thereby improving the above effect. Can do.

In any of the above-described reference embodiments and embodiments, in order to stably transport the transported object 5, the outer annular body 12 and the inner annular body 13 are brought into contact with each other so as to be reliably rotated integrally. It is desirable to form engaging portions that engage the surfaces 15 and 16 with each other. Such an engaging portion can be constituted by increasing the surface roughness, forming a simple unevenness, or the like. For example, as shown in FIGS. It is desirable to form a plurality of 21 and 21 at predetermined intervals in the belt longitudinal direction.

  By doing so, since the outer annular body 12 and the inner annular body 13 are stacked and shifted in the belt longitudinal direction, the two are mechanically engaged. Can be transported. The shape of the ridge 21 is not particularly limited, and may be extended in a curved shape or V shape in the belt width direction, and the cross section in the belt longitudinal direction may be triangular or trapezoidal.

  Such protrusions 12 can be easily formed by integrally molding in a vulcanization mold or by adhering a separately manufactured rubber member.

DESCRIPTION OF SYMBOLS 1 Belt conveyor 2 Drive pulley 3 Driven pulley 4 Conveyor belt 5 Conveyance belt 6 Conveyance surface 7 Upper cover rubber layer 8 Lower cover rubber layer 9 Core body layer 10 Intermediate rubber layer 11 Roller 12 Outer ring body 13 Inner ring body 14 Ear rubber 15 , 16 Contact surface 17 Reinforcing layer 18 Lower surface 19, 20 Recess 21 Projection

Claims (4)

In a conveyor belt having a core layer interposed between an upper cover rubber layer and a lower cover rubber layer, at least a part of the upper cover rubber layer is an outer annular body , and the outer annular body is other than the outer annular body. The inner annular body made of the belt member is laminated in a non-adhesive manner , and a recess extends in the longitudinal direction of the belt on the inner peripheral surface of the outer annular body, and the inner annular body is in the recess. conveyor belts, characterized in that but in the fitted state, a configuration in which both sides of the belt width direction of the inner annular member is sandwiched by said outer annular body. The conveyor belt according to claim 1, wherein an engagement portion that engages with each other is provided on a contact surface between the outer annular body and the inner annular body. The conveyor belt according to claim 2, wherein the engaging portion includes a plurality of protrusions extending in the belt width direction that exist at predetermined intervals in the belt longitudinal direction.   The conveyor belt according to claim 1, wherein the outer annular body has at least one reinforcing layer.

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