JP2011121661A - Conveyor belt regenerating member and conveyor belt regenerating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveyor belt regenerating member and a conveyor belt regenerating method, obviating the need of buffing a bonding surface of the rubber layer of the conveyor belt regenerating member bonded to a conveyor belt. <P>SOLUTION: The conveyor belt regenerating member 1 includes: a rubber layer 2 made of a vulcanized rubber material; and a separable sheet 3 separably attached to the bonding surface 2a of the rubber layer 2. A surface of the separable sheet 3 attached to the rubber layer 2 is a rough surface with a plurality of projections and recesses. The bonding surface 2a of the rubber layer 2 is tightly adhered to the attaching surface of the separable sheet 3. After a covering rubber layer 13 of the conveyor belt 10 is removed, the separable sheet 3 of the conveyor belt regenerating member 1 is separated from the bonding surface 2a of the rubber layer 2, such that the bonding surface 2a of the rubber layer 2 is bonded to a surface 11a of a core body layer 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a conveyor belt regeneration member for regenerating a cover rubber layer on the surface of a conveyor belt, and a conveyor belt regeneration method using the conveyor belt regeneration member.

  A conveyor belt used for conveying articles or the like includes a core layer in which a reinforcing core material such as a steel cord is embedded, and a cover rubber layer formed on the surface of the core layer. When the cover rubber layer is worn or damaged due to contact with the conveyed product, the cover rubber layer is removed, and a newly vulcanized rubber sheet is adhered to the surface of the core body layer to be regenerated. In this case, the adhesive surface of the rubber sheet and the surface of the core layer are buffed to form a rough surface, and these are then adhered with an adhesive or the like. Thus, by making the adhesion surface of the rubber sheet and the surface of the core body layer rough, respectively, these surface areas are increased and the adhesion strength is improved.

  Japanese Utility Model Laid-Open No. 2-64508 describes a conveyor belt in which a canvas is embedded at the boundary between the core layer and the cover rubber layer in order to facilitate the removal of the cover rubber layer during the regeneration. Since the bonding force between the canvas and the cover rubber layer is weaker than the bonding force between the rubber materials of the core layer and the cover rubber layer, the cover rubber layer can be easily covered by peeling the cover rubber layer from the canvas during reproduction. The rubber layer can be removed. In the same issue, after removing the cover rubber layer, an adhesive is applied to the canvas remaining on the surface of the core layer, and the vulcanized rubber sheet is bonded to the canvas.

  After removing the cover rubber layer, instead of adhering the vulcanized rubber sheet to the core layer surface, unvulcanized rubber is laminated on the core layer surface, and then this unvulcanized rubber is vulcanized to cover The rubber layer is also regenerated.

2-64508

  In the above-mentioned Japanese Utility Model Laid-Open No. 2-64508, prior to bonding a vulcanized rubber sheet for regeneration to a core body layer, it is necessary to roughen the adhesive surface of the rubber sheet to the core body layer by buffing. . This buffing operation is very troublesome. Further, it is not easy to make the entire adhesive surface of the rubber sheet uniform and rough by this buffing. Further, since the rubber dust is generated by this buffing, the working environment is deteriorated.

  When the cover rubber layer is regenerated from the unvulcanized rubber, buffing is not necessary, but it is troublesome to manage and operate due to the expiration date (for example, about 6 months).

  It is an object of the present invention to provide a conveyor belt regeneration member and a conveyor belt regeneration method that do not require buffing the adhesive surface of the vulcanized rubber layer of the conveyor belt regeneration member to the conveyor belt.

  The conveyor belt recycling member of the present invention (Claim 1) is a sheet-like rubber layer made of a vulcanized rubber material, which is adhered to the surface of the conveyor belt after the cover rubber layer is removed, and the rubber layer. A release sheet attached to the conveyor belt in an detachable manner, and the adhesion surface of the release sheet to the rubber layer is a rough surface having a plurality of irregularities. The adhesive surface is in close contact with the adhesion surface of the release sheet.

  The conveyor belt regeneration member according to claim 2 is characterized in that, in claim 1, the surface roughness Ra of the adhesion surface of the release sheet is 1 to 5000 μm, preferably 20 to 400 μm.

  According to a third aspect of the present invention, there is provided the member for regenerating a conveyor belt according to the first or second aspect, wherein the release sheet is made of canvas.

  The conveyor belt regeneration member according to claim 4 is the conveyor belt regeneration member according to claim 3, wherein the canvas is covered with or impregnated with a peelable material having peelability to the rubber material of the rubber layer. It is characterized by this.

  According to a fifth aspect of the present invention, there is provided the member for regenerating a conveyor belt according to the fourth aspect, wherein the peelable material is silicone or fluororesin.

  A conveyor belt regeneration method of the present invention (Claim 6) is a conveyor belt regeneration method for regenerating a cover rubber layer of a conveyor belt by the conveyor belt regeneration member according to any one of Claims 1 to 5, A cover rubber layer removing step for removing the cover rubber layer of the conveyor belt; and the release sheet of the conveyor belt recycling member is peeled off from the adhesive surface of the rubber layer, and the adhesive surface is removed from the conveyor rubber layer. And a lamination step of adhering to the belt surface and laminating the rubber layer on the conveyor belt surface.

  The method for regenerating a conveyor belt according to claim 7 is the method of claim 6, wherein in the laminating step, an adhesive rubber made of an unvulcanized rubber material is sandwiched between the adhesive surface of the rubber layer and the conveyor belt surface. The rubber layer is bonded to the conveyor belt surface by vulcanizing the adhesive rubber.

  The conveyor belt regeneration method according to claim 8 is the conveyor belt regeneration method according to claim 6, wherein an adhesive is interposed between the adhesive surface of the rubber layer and the conveyor belt surface in the laminating step, and the rubber layer is bonded by the adhesive. It adheres to the conveyor belt surface.

  In the conveyor belt recycling member of the present invention, the adhesion surface of the rubber layer adhered to the surface of the conveyor belt after removing the cover rubber layer is in close contact with the adhesion surface of the release sheet. Yes. The adhesion surface of this release sheet is a rough surface having a plurality of irregularities. That is, when the release sheet is peeled off from the rubber layer, a rough surface formed by transferring the shape of the attached surface of the release sheet appears on the adhesive surface of the rubber layer. Accordingly, when the cover rubber layer is regenerated using the conveyor belt regenerating member of the present invention, the adhesive sheet of the rubber layer is simply peeled off before the rubber layer is bonded to the conveyor belt surface. It is not necessary to buff the adhesive surface of the rubber layer. Thereby, the reproduction | regeneration operation | work of a conveyor belt is facilitated.

As described in claim 2, the surface roughness of the adhesion surface of the release sheet (that is, the roughness of the rough surface transferred to the adhesive surface of the rubber layer) is preferably 1 to 5000 μm, particularly 20 to 400 μm. By comprising in this way, the adhesive strength, such as an adhesive agent, to this adhesion surface becomes high. If the surface roughness is less than 1 μm, a predetermined adhesive force cannot be obtained, and the performance of the recycled belt becomes insufficient. Further, even if the surface roughness is larger than 5000 μm, a predetermined adhesive force cannot be obtained, and the performance of the recycled belt becomes insufficient. In the present invention, this surface roughness is the centerline average roughness Ra ₇₅ defined in JIS B0601.

  As the third aspect, canvas is suitable as the release sheet. In the present invention, the canvas means all thick woven fabrics and knitted fabrics. The surface of the canvas is a rough surface in which irregularities are regularly formed by warp and weft constituting the woven or knitted structure. Therefore, by using this canvas as a release sheet, regular irregularities on the surface of the canvas are transferred to the adhesive surface of the rubber layer, and a substantially uniform rough surface can be easily formed on the adhesive surface of the rubber layer. .

  As described in claim 4, when the canvas is covered with a peelable material or the canvas is impregnated with the peelable material, the peeling operation of the release sheet during the regeneration of the conveyor belt is facilitated. As claimed in claim 5, the releasable material is preferably a fluororesin such as silicone or polytetrafluoroethylene.

  According to the conveyor belt recycling method of the present invention (Claim 6) using the conveyor belt recycling member of the present invention, when the conveyor belt is recycled, first, the worn or damaged conveyor belt cover rubber layer is removed (cover). Rubber layer removal step), and then peel off the release sheet of the conveyor belt recycling member from the adhesive surface of the rubber layer, adhere the adhesive surface to the conveyor belt surface after removing the cover rubber layer, and laminate the rubber layer on the conveyor belt surface This is only necessary (stacking step), and it is not necessary to buff the adhesive surface of the rubber layer of the conveyor belt recycling member, so the conveyor belt regeneration operation is facilitated. Moreover, since generation | occurrence | production of the dust accompanying reproduction | regeneration of a conveyor belt is prevented or reduced by this, a working environment is improved. In addition, when the adhesion surface of the rubber layer is rough, dirt easily adheres to the adhesion surface, but the release sheet is adhered to the adhesion surface of the rubber layer until just before the rubber layer is adhered to the conveyor belt surface. By leaving it as it is, contamination of the adhesive surface of the rubber layer is also prevented.

  As in claim 7, in this laminating step, an adhesive rubber made of an unvulcanized rubber material is sandwiched between the adhesive surface of the rubber layer and the conveyor belt surface, and the adhesive rubber is vulcanized to obtain a rubber. The layer may be adhered to the conveyor belt surface. In such a case, the rubber layer can be bonded extremely firmly to the conveyor belt surface. Further, as in claim 8, in this laminating step, an adhesive may be interposed between the adhesive surface of the rubber layer and the conveyor belt surface, and the rubber layer may be adhered to the conveyor belt surface with the adhesive. In this case, the rubber layer can be easily and firmly bonded to the conveyor belt surface.

It is a perspective view of the member for conveyor belt reproduction | regeneration which concerns on embodiment. It is sectional drawing which follows the II-II line of FIG. It is sectional drawing which shows the conveyor belt reproduction | regeneration method using the member for conveyor belt reproduction | regeneration of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the following embodiments.

  1 (a) and 1 (b) are perspective views of a conveyor belt recycling member according to an embodiment, and FIG. 1 (a) shows the conveyor belt recycling member on the front side (opposite to the adhesion surface to the conveyor belt). FIG. 1 (b) is a view of the conveyor belt regeneration member as seen from the back side (the side of the adhesive surface to the conveyor belt). FIG. 2 is a sectional view taken along the line II-II in FIG. 1 (a), and shows a state where a part of the release sheet is peeled off. 3 (a) to 3 (c) are sectional views showing a conveyor belt regeneration method using this conveyor belt regeneration member, and FIG. 3 (a) shows a state before the conveyor belt is worn, FIG. 3 (b) shows a state in which the conveyor belt is worn, FIG. 3 (c) shows a state in which the conveyor belt is regenerated, and FIG. 3 (d) shows a state in which the regeneration of the conveyor belt is completed. ing.

  In this embodiment, as shown in FIG. 3A, the conveyor belt 10 includes a core layer 11 in which a plurality of steel cords 12 are embedded as a reinforcing core material, and a conveyance surface F of the core layer 11. And a cover rubber layer 13 formed on the side surface.

  The conveyor belt regeneration member 1 for regenerating the cover rubber layer 13 of the conveyor belt 10 is a rubber made of a vulcanized rubber material that is adhered to the surface of the core layer 11 after the cover rubber layer 13 is removed. A layer 2 and a release sheet 3 attached to the adhesive surface 2a of the rubber layer 2 to the conveyor belt 10 so as to be peelable are provided. The rubber layer 2 is preferably made of the same rubber material as the cover rubber layer 13 of the conveyor belt 10. However, the rubber material constituting the rubber layer 2 may be different from the rubber material constituting the cover rubber layer 13. In this embodiment, the thickness and width of the rubber layer 2 are substantially the same as those of the cover rubber layer 13, but may be different. The adhesive surface 2 a of the rubber layer 2 is in close contact with the release sheet 3.

  The adhesion surface of the release sheet 3 to the rubber layer 2 is a rough surface having a plurality of irregularities. In this invention, it is preferable that surface roughness Ra of the adhesion surface of this peeling sheet 3 is 1-5000 micrometers, especially 20-400 micrometers. As a result, the adhesive strength of the adhesive or the like to the adhesive surface is high. If the surface roughness Ra is less than 1 μm, a predetermined adhesive force cannot be obtained, and the performance of the recycled belt becomes insufficient. Further, even if the surface roughness is larger than 5000 μm, a predetermined adhesive force cannot be obtained, and the performance of the recycled belt becomes insufficient.

In this embodiment, the release sheet 3 is made of canvas. As described above, in the present invention, the canvas is a thick woven fabric and knitted fabric, and the surface of the canvas is a rough surface on which irregularities are regularly formed by the warp and weft constituting the woven or knitted structure. It has become. The canvas, a basis weight 100 to 2000 g / ^{m 2,} especially 100 to 300 g / ^{m 2,} canvas is preferable that and woven at Ox weave. In the present invention, the canvas may be covered with a peelable material having peelability with respect to the rubber material of the rubber layer 2, or the canvas may be impregnated with the peelable material. By doing in this way, the peeling operation | work of the peeling sheet 3 from the rubber layer 2 at the time of conveyor belt reproduction | regeneration is facilitated. As the peelable material, a fluororesin such as silicone or Teflon (registered trademark) is suitable.

  The conveyor belt regeneration member 1 is manufactured by bringing the release sheet 3 into close contact with the adhesive surface 2a of the rubber layer 2 in an unvulcanized state, and then vulcanizing the rubber layer 2. In this way, the release sheet 3 is adhered to the adhesive surface 2a of the unvulcanized rubber layer 2 and vulcanized, whereby the rubber layer 2 and the release sheet 3 are integrated as shown in FIG. The surface shape of the release sheet 3 is transferred to the adhesive surface 2a of the rubber layer 2.

  When the conveyor belt 10 is regenerated by the conveyor belt regenerating member 1 configured as described above, first, as shown in FIGS. 3 (b) to 3 (c), the conveyor belt 10 is transported in the cover rubber layer 13 of the conveyor belt 10. A part worn or damaged by contact with an object is removed (removed) with a slicer or the like. Next, the surface 11a of the core body layer 11 after removing the cover rubber layer 13 is buffed to make a rough surface. Next, the release sheet 3 of the conveyor belt recycling member 1 is peeled off from the adhesive surface 2a of the rubber layer 2, and the adhesive surface 2a is bonded to the surface 11a of the core layer 11 after buffing. In this embodiment, the rubber layer 2 is vulcanized and bonded to the core layer 11 using the rubber sheet 4 for bonding. That is, when the rubber layer 2 is bonded to the core body layer 11, an adhesive rubber sheet 4 made of an unvulcanized rubber material is disposed between the adhesive surface 2a of the rubber layer 2 and the surface 11a of the core body layer 11. Then, the adhesive rubber sheet 4 is vulcanized. As a result, the rubber layer 2 is bonded to the surface 11 a of the core body layer 11 by the rubber sheet 4 for vulcanization bonding. In the present invention, the rubber layer 2 may be bonded to the core body layer 11 by an adhesive means other than the adhesive rubber sheet 4, for example, an adhesive.

  In this conveyor belt recycling member 1, the adhesive surface 2 a of the rubber layer 2 is in close contact with the release sheet 3. As described above, the adhesion surface of the release sheet 3 is a rough surface. That is, when the release sheet 3 is peeled from the rubber layer 2, the shape of the adhesion surface of the release sheet 3 is transferred to the adhesive surface 2a of the rubber layer 2 as shown in FIGS. The rough surface formed by appears. Therefore, prior to adhering the rubber layer 2 to the surface 11a of the core layer 11, it is only necessary to peel the release sheet 3 from the adhesive surface 2a of the rubber layer 2, and the adhesive surface 2a of the rubber layer 2 is buffed. It is not necessary to multiply. Thereby, the reproduction | regeneration operation | work of the conveyor belt 10 is facilitated. Moreover, since generation | occurrence | production of the dust accompanying reproduction | regeneration of the conveyor belt 10 is prevented or reduced by this, a working environment is improved. In addition, when the adhesion surface 2a of the rubber layer 2 is a rough surface, dirt easily adheres to the adhesion surface 2a, but the release sheet 3 is just before the rubber layer 2 is adhered to the surface 11a of the core body layer 11. Is left attached to the adhesive surface 2a, so that the adhesive surface 2a of the rubber layer 2 is also prevented from being soiled.

  In this embodiment, the conveyor belt regenerating member 1 has the rubber layer 2 by bringing the release sheet 3 into close contact with the adhesive surface 2a of the rubber layer 2 in an unvulcanized state and then vulcanizing the rubber layer 2. And the release sheet 3 are integrated. With this configuration, the surface shape of the release sheet 3 can be easily and accurately transferred to the adhesive surface 2a of the rubber layer 2, and the release sheet 3 is attached to the rubber layer 2 with an adhesive or the like. In addition, the release sheet 3 can be attached to the adhesive surface 2a of the rubber layer 2 with an adhesive force that can be peeled off.

  In this embodiment, the surface roughness Ra of the surface of the release sheet 3, that is, the surface roughness Ra of the adhesive surface 2 a of the rubber layer 2 that has been made rough by transferring the surface shape of the release sheet 3 is 1 to 1. Since it is 5000 μm, the bonding strength of the adhesive rubber sheet 4 and the adhesive to the adhesive surface 2 a of the rubber layer 2 is high.

  In this embodiment, canvas is used as the release sheet 3. Since the surface of the canvas is a rough surface in which irregularities are regularly formed by the warp and weft constituting the woven or knitted structure, by using the canvas as the release sheet 3, the surface of the canvas Regular irregularities are transferred to the adhesive surface 2a of the rubber layer 2, and a substantially uniform rough surface is formed over the entire adhesive surface 2a of the rubber layer 2.

  In this embodiment, an adhesive rubber sheet 4 made of an unvulcanized rubber material is disposed between the rubber layer 2 and the core body layer 11, and the adhesive rubber sheet 4 is vulcanized to thereby form a rubber layer. Since 2 is bonded to the core layer 11, the rubber layer 2 is firmly bonded to the core layer 11.

  The above embodiment shows an example of the present invention, and the present invention is not limited to the above embodiment.

  For example, also in the present invention, the conveyor belt 10 may have a configuration in which a canvas is embedded in the boundary portion between the core body layer 11 and the cover rubber layer 3, as in the case of the above-mentioned actual open flat 2-64508. In this case, when the conveyor belt 10 is regenerated, the cover rubber layer 13 can be easily removed by peeling the cover rubber layer 13 from the canvas. Facilitated. In this case, after removing the cover rubber layer 13, the rubber layer 2 of the conveyor belt regeneration member 1 may be adhered to the canvas remaining on the surface of the core layer 11, and the canvas is also peeled off. The rubber layer 2 may be directly bonded to the surface of the core layer 11. When the rubber layer 2 is bonded to the canvas remaining on the surface of the core layer 11, the surface of the canvas is a rough surface having regular irregularities, and therefore the rubber layer 2 is attached to the canvas with sufficient adhesive strength. While being able to adhere | attach, the removal of the rubber layer 2 at the time of re-regeneration can also be performed easily. Further, when the canvas is also peeled off and the rubber layer 2 is directly bonded to the surface 11a of the core body layer 11, the surface 11a of the core body layer 11 is formed by transferring the shape of the surface of the canvas. Since the rough surface appears, it is not necessary to buff the surface 11a of the core body layer 11, and the rubber layer 2 can be firmly bonded to the surface 11a of the core body layer 11. In this case, substantially no buffing is required when the conveyor belt 10 is regenerated.

  In the above embodiment, canvas is used as the release sheet 3, but the release sheet 3 is not limited to this. As the release sheet 3, for example, a fluororesin sheet such as polytetrafluoroethylene may be used.

  In the above embodiment, the surface of the cover rubber layer 13 (conveying surface F) and the surface of the rubber layer 2 of the conveyor belt regeneration member 1 are flat surfaces. A stopping fin or the like may be provided.

DESCRIPTION OF SYMBOLS 1 Conveyor belt reproduction | regeneration member 2 Rubber layer 2a Adhesive surface 3 Release sheet 10 Conveyor belt 11 Core body layer 12 Steel cord (reinforcing core material)
13 Cover rubber layer

Claims (8)

In a recycling member for recycling the cover rubber layer of a conveyor belt having a cover rubber layer on the surface,
The recycling member is a sheet-like rubber layer made of a vulcanized rubber material that is adhered to the surface of the conveyor belt after removing the cover rubber layer;
A release sheet adhering to the adhesive surface of the rubber layer to the conveyor belt so as to be peelable;
The adhesion surface of the release sheet to the rubber layer is a rough surface having a plurality of irregularities,
A member for regenerating a conveyor belt, wherein the adhesive surface of the rubber layer is in close contact with the adhesion surface of the release sheet.   2. The conveyor belt regeneration member according to claim 1, wherein a surface roughness Ra of the adhesion surface of the release sheet is 1 to 5000 [mu] m.   The conveyor belt regeneration member according to claim 1 or 2, wherein the release sheet is made of canvas.   4. The conveyor belt regeneration member according to claim 3, wherein the canvas is covered with or impregnated with a peelable material having peelability to the rubber material of the rubber layer.   5. The conveyor belt recycling member according to claim 4, wherein the peelable material is silicone or fluororesin. A conveyor belt regeneration method for regenerating a cover rubber layer of a conveyor belt by the conveyor belt regeneration member according to any one of claims 1 to 5,
A cover rubber layer removing step of removing the cover rubber layer of the conveyor belt;
Lamination that peels off the release sheet of the conveyor belt recycling member from the adhesive surface of the rubber layer, adheres the adhesive surface to the conveyor belt surface after removing the cover rubber layer, and laminates the rubber layer on the conveyor belt surface And a process for regenerating the conveyor belt.   7. The lamination process according to claim 6, wherein in the laminating step, an adhesive rubber made of an unvulcanized rubber material is sandwiched between the adhesive surface of the rubber layer and the conveyor belt surface, and the adhesive rubber is vulcanized. A method for reclaiming a conveyor belt, comprising adhering the rubber layer to a surface of the conveyor belt.   7. The lamination step according to claim 6, wherein an adhesive is interposed between the adhesive surface of the rubber layer and the conveyor belt surface, and the rubber layer is bonded to the conveyor belt surface by the adhesive. Conveyor belt regeneration method.

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