JP2010185479A - Method of reinforcing end part of belt conveyer, and junction structure for the belt conveyer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of reinforcing an end part of a belt conveyer, capable of enhancing an end part strength of the belt conveyer, and allowing reinforcement not to project a joint fitting drilled into the belt end part from a surface of a belt body, and junction structure for the belt conveyer. <P>SOLUTION: A conveyer belt 1 is provided to be laminated with cover rubber 3 on upper and under faces of a core material layer 2. A reinforcing cloth 4 is arranged between the cover rubber 3 in the belt end part and core material layer 2 therein. Junction pins 10 are drilled from the reinforcing cloth 4 into the core material layer 2, to connect endlessly the conveyer belt 1. The reinforcing cloth 4, the junction pins 10 and the cover rubber 3 are integrated in an inside of the cover rubber 3 by thermo-compression bonding. The junction pins 10 drilled into the core material layer 2 are fixed to an inner side of the reinforcing cloth 4 and the cover rubber 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a conveyor belt end reinforcing method and a conveyor belt joint structure that reinforces a connecting end when a joint fitting is driven into an end of the conveyor belt and joined endlessly.

  When joining the conveyor belt in an endless manner, there is a means for driving and connecting a joint fitting to the belt end. In this type of connecting means, when the fitting is driven, a connecting hole is opened in the belt end, so this connecting hole affects the strength of the belt end, and the strength of the bell and the end is approximately 40%. It is known that it will drop below.

  Patent Document 1 describes a joint structure that increases the strength of a belt end portion of a conveyor belt. According to this Patent Document 1, the cover rubber at the end of the belt is peeled off, the core layer is exposed, the reinforcing canvas is joined to the core layer, and the unvulcanized cover rubber is applied on the reinforcing canvas. By vulcanizing, the core layer, the reinforcing canvas, and the cover rubber are integrated. In this way, the reinforcing canvas is interposed between the core layer at the belt end portion and the cover rubber, thereby increasing the strength of the belt end portion.

  Patent Document 2 proposes a rubber endless belt and an endless method thereof. According to this rubber endless belt, an endless belt and an endless method have been proposed to prevent troubles during transport that occur at the belt connecting part using a metal hook and abnormal noise that occurs when this metal hook contacts. It is.

Japanese Utility Model Publication No. 62-77350 Japanese Patent Laid-Open No. 2003-222196

  However, since the joint structure of Patent Document 1 has a large number of insertion holes for fixing the connection fittings at the end of the belt, and the connection attachments such as bolts are inserted through the insertion holes, the connection attachments that penetrate the conveyor belt. However, it moves on the belt surface in a bare state. However, the belt conveyor may be equipped with a device such as a belt cleaner that cleans the surface of the belt and a scraper that removes deposits attached to the scraping belt on the back surface of the belt. For this reason, if the connecting fitting driven into the belt end protrudes from the surface of the belt main body, the fitting fitting protruding from such a tool comes into contact with the joint fitting, resulting in a very dangerous state, and there is a possibility that it cannot be used.

  Moreover, in Patent Document 1, a reinforced canvas with unvulcanized rubber is attached to the core layer, and then the unvulcanized cover rubber member is further applied to the upper surface of the reinforced canvas with unvulcanized rubber for vulcanization. Even if a sufficient bonding force between the reinforcing canvas and the cover rubber is obtained, there remains a problem in the bonding force between the core layer and the reinforcing canvas. That is, even if the reinforcing canvas is integrated with the cover rubber, the bonding force with the reinforcing canvas is weak. Therefore, Patent Document 1 proposes a means for interposing a thin rubber layer between the core layer and the reinforcing canvas in order to increase the bonding strength between the core layer and the reinforcing canvas. However, with this means, a thin rubber layer is placed above and below the core layer, and a reinforcing canvas is laminated on each thin rubber layer and joined, and then a large number of insertion holes for fixing the connecting metal are drilled at this end. It becomes work to install. Therefore, the work for increasing the bonding strength between the core layer and the reinforcing canvas has to be extremely complicated, and is not suitable for work on the site where the conveyor belt is installed.

  On the other hand, according to the endless belt shown in Patent Document 2, the metal hooks are connected to each other at the core layers at the belt end portions, and the core layer and the metal hooks are covered with the front and back cover layers. The hook is made not to protrude from the belt surface. For this reason, in Patent Document 2, the strength of the belt end connected by the metal hooks is still lowered and the strength of the belt end cannot be increased even though the trouble at the time of conveyance can be prevented. .

  Therefore, the present invention was created to solve the above-mentioned problems, and the joint end of the conveyor belt is reinforced in a state where the joint fittings driven into the belt end are joined so as not to protrude from the surface of the belt body. An object of the present invention is to provide a conveyor belt end reinforcing method and a conveyor belt joint structure that can be used.

  The first means of the present invention is a method for reinforcing the end portion of a conveyor belt in which cover rubbers 3 are laminated on the upper and lower surfaces of the core material layer 2 and a joining pin 10 for connecting the end portion of the conveyor belt 1 in an endless manner is mounted. , A cover peeling process 100 for peeling the cover rubber 3 at the belt end from the core material layer 2, a cover processing process 200 for thinning the tip of the peeled cover rubber 3 and processing it into a substantially wedge shape, and a cover rubber A reinforcing cloth bonding step 300 in which a reinforcing cloth 4 that has been impregnated with unvulcanized rubber and then vulcanized is bonded to the core material layer 2 from which the core 3 has been peeled with an adhesive 5; A bonding pin driving step 400 for driving the bonding pin 10 over the layer 2; a cover rubber bonding step 500 for covering and adhering the peeled cover rubber 3 to the reinforcing cloth 4 and the bonding pin 10 into which the bonding pin 10 has been driven; Upper and lower caps bonded to the reinforcing cloth 4 -Thermocompression bonding in which a rubber sheet Q for pressure bonding is laminated on the rubber 3 via a release paper P and the conveyor belt 1 is sandwiched, and the conveyor belt 1 is heated and pressure-bonded by a hot plate R for pressing from above and below the rubber sheet Q for pressure bonding. Step 600 is a method for reinforcing the end portion of the joining pin 10 driven into the core material layer 2 and fixing it to the integrated interior of the reinforcing cloth 4 and the cover rubber 3.

  The second means is set so that in the thermocompression bonding step 600, the pressure-bonding rubber sheet Q is thermocompression bonded at a temperature of 120 ° C. and a pressure of 0.4 NPa for 5 minutes.

  A third means is that, in the reinforcing cloth bonding step 300, the adhesive 5 is a ten-to-one ratio of a main agent in which toluene n-hexane is blended with a rubber material or a resin material and a curing accelerator made of an ethyl acetate solution. Adhesive mixed in the ratio of

  4th means WHEREIN: In the conveyor belt 1 by which the cover rubber 3 was laminated | stacked on the upper and lower surfaces of the core material layer 2, the reinforcement cloth 4 distribute | arranged between the cover rubber 3 and the core material layer 2 of this belt edge part, A joining pin 10 that is driven from the reinforcing cloth 4 into the core material layer 2 and connects the conveyor belt 1 in an endless manner is integrated inside the cover rubber 3 by thermocompression bonding and driven into the core material layer 2. A joining structure of a conveyor belt, wherein the joining pin 10 is fixed inside the reinforcing cloth 4 and the cover rubber 3.

  The fifth means uses a clipper hook whose tip is bent into a substantially bowl shape as the joining pin 10.

  In the sixth means, the reinforcing cloth 5 is formed by impregnating a non-vulcanized rubber with a polyester, nylon or aramid fiber woven cloth and then vulcanized to form a tear strength 2 to 5 times that of a conveyor belt. The use of the reinforcing cloth 5 is a means for solving the problem.

  According to the reinforcing method of claim 1 and the joint structure of claim 4 of the present invention, the joining pin 10 driven into the core material layer 2 is fixed to the integrated interior of the reinforcing cloth 4 and the cover rubber 3. The connection strength between the core material layer 2 and the joining pin 10 is supported by the connection strength between the reinforcing cloth 4 and the cover rubber 3, and the connection end portion of the conveyor belt into which the joining pin 10 is driven is reliably reinforced. can do.

  Moreover, there is no possibility that the joining pin 10 protrudes from the surface of the conveyor belt 1 and comes into contact with a belt cleaner, a scraper or the like. Therefore, the connection end of the conveyor belt can be reinforced in a state where the joint fitting driven into the belt end is joined so as not to protrude from the surface of the belt main body.

  Further, the cover processing step 200 prevents the belt end from becoming thick, and prevents the cover rubber 3 from peeling off due to the tip of the cover rubber 3 coming into contact with a belt cleaner, a scraper or the like when the conveyor belt 1 is moved. .

  Moreover, since the reinforcing cloth 4 vulcanized after impregnating the unvulcanized rubber is used in the reinforcing cloth bonding process 300, the reinforcing cloth 4 having extremely excellent strength can be used.

  Further, since the joining pin 10 that has digged into the core material layer 2 is integrated and fixed between the reinforcing cloth 4 and the cover rubber 3 by the cover rubber bonding process 500, the strength of the belt end including the joining pin 10 is rationalized. Therefore, even if the belt end portion is thin, sufficient reinforcement is possible.

  Then, the thermocompression process 600 can surely perform the thermocompression of the belt end deformed by the insertion of the joining pin 10 and the reinforcing cloth 4, prevent uneven vulcanization and uneven adhesion, and realize uniform joining strength. To do.

  According to the reinforcing method of claim 2, in the thermocompression bonding step 600, the pressure-bonding rubber sheet Q is thermocompression bonded at a temperature of 120 ° C. and a pressure of 0.4 NPa for 5 minutes, whereby the reinforcing cloth 4 and the cover rubber 3 Can be integrated and the joining pin 10 arranged between them can be reliably held.

  In claim 3, in the reinforcing cloth bonding step 300, the adhesive 5 includes a rubber material or a resin material mixed with toluene n-hexane and a curing accelerator composed of an ethyl acetate solution in a ratio of 10: 1. Since an adhesive mixed in proportion is used, the adhesive 5 is vulcanized by applying pressure and high heat to the adhesive 5 in the thermocompression bonding step 600, and the core material layer is interposed via the reinforcing cloth 4. Since 2 and the cover rubber 3 are integrated, a very strong bonding force can be obtained.

  According to the joint structure according to claim 5, by using a clipper hook whose tip is bent into a substantially bowl shape as the joint pin 10, the thickness of the belt end connected using the joint pin 10 can be reduced. It can be made as thin as possible. In addition, since the tip bent in a hook shape sharply bites into the core material layer 2, a small connection hole can be opened in the core material layer 2, and a decrease in strength due to this connection hole can be prevented as much as possible.

  According to claim 6, the reinforcing cloth 5 is formed to have a tear strength of 2 to 5 times that of a conveyor belt by impregnating an unvulcanized rubber with a polyester, nylon or aramid fiber woven cloth. By using the reinforcing cloth 5, it is possible to drastically increase the connection strength that would conventionally be reduced to 40% or less. As a result, since the strength of the portion into which the joining pin 10 is driven is insufficient, the work of reconnecting at the work place is not necessary, and it can withstand long-term use.

It is principal part sectional drawing which shows one Example of the junction part structure of this invention. It is principal part sectional drawing which shows the cover peeling process and cover processing process of this invention reinforcement method. It is principal part sectional drawing which shows the reinforcement cloth adhesion process of this invention reinforcement method. It is principal part sectional drawing which shows the joining pin driving process and cover rubber adhesion process of this invention reinforcement method. It is principal part sectional drawing which shows the thermocompression bonding process of this invention reinforcement method. It is process drawing which shows this invention reinforcement method.

  According to the conveyor belt end reinforcing method and the conveyor belt joint structure of the present invention, the joint end of the conveyor belt is joined in such a manner that the joint fitting driven into the belt end does not protrude from the surface of the belt body. The purpose such as being able to reinforce was realized.

  Embodiments of the present invention will be described below with reference to the drawings. The reinforcing method of the present invention is a method of reinforcing the belt end portion to which the joining pin 10 such as metal racing or whale racing of the conveyor belt 1 in which the cover rubber 3 is laminated on the upper and lower surfaces of the core material layer 2 is mounted. That is, the reinforcing method of the present invention includes a cover peeling process 100, a cover processing process 200, a reinforcing cloth bonding process 300, a joining pin driving process 400, a cover rubber bonding process 500, and a thermocompression bonding process 600 (see FIG. 6).

  The cover peeling process 100 is a process of peeling the cover rubber 3 at the belt end from the core material layer 2 (see FIG. 2). In this step, the cover rubber 3 of the conveyor belt 1 on which the core material layer 2 is laminated (product strength of about 100 to 1500 N / mm) is separated from the belt end portion by about 50 to 60 mm and peeled off from the core material layer 2. . In this step, the cover rubber 3 is cut off from the belt end portion and peeled off from the core material layer 2, but the cover rubber 3 itself is left without being separated from the conveyor belt 1, and a cover rubber bonding step 500 described later is performed. When doing so, make it easy to re-paste.

  The cover rubber 3 is classified according to its intended use into wear resistance, impact resistance, medium temperature heat resistance, high temperature heat resistance, ultra high temperature heat resistance, heavy oil resistance, and chemical resistance. The thickness of the cover rubber 3 is selected for each of these classifications. In the present invention, the cover rubber 3 of the conveyor belt 1 that conveys the belt surface at a room temperature (80 ° C. or less) is the target. The thickness of the cover rubber 3 on the upper surface that conveys the product is 1.0 to 15.0 mm, the lower surface The cover rubber 3 on both sides of the core material layer 2 is peeled off for the conveyor belt 1 having a thickness of the cover rubber 3 of 1.0 to 5.0 mm. In this peeling operation, the cover rubber 3 can be efficiently peeled by using a ply separator processing machine.

  In the cover processing step 200, the tip of the peeled cover rubber 3 is thinned and processed into a substantially wedge shape. In this step, a leather ski is used to process one side of the cover rubber 3 or both sides into a wedge shape of 30 ° to 80 °. In the example of illustration, it is made thin along the dashed-dotted line part (refer FIG. 2).

  The reinforcing cloth adhering step 300 is a step of adhering the naturally vulcanized reinforcing cloth 4 with the adhesive 5 after impregnating the unvulcanized rubber with the core material layer 2 from which the cover rubber 3 has been peeled off ( (See FIG. 3). This reinforcing cloth 4 is made by laminating one or a plurality of polyester, nylon and aramid fiber woven cloths, impregnating unvulcanized rubber, then naturally vulcanizing, and tearing 2 to 5 times the conveyor belt. It is formed with strength. The thickness of the reinforcing cloth 4 to be used is set to be about 1 mm thinner than the thickness of the cover rubber 3. Furthermore, as an adhesive 5, by using an adhesive obtained by mixing a rubber material or a resin material with a main agent formulated with toluene n-hexane and a curing accelerator composed of an ethyl acetate solution in a ratio of 10: 1, Since this adhesive 5 can also be vulcanized at the time of thermocompression bonding in a thermocompression bonding process 600 described later, a strong bonding force can be obtained.

  The joining pin driving step 400 is a step of driving the joining pin 10 from the reinforcing cloth 4 to the core material layer 2 (see FIG. 4). By using a clipper hook whose tip portion 10A is bent in a substantially bowl shape as the joining pin 10, the connecting end portion can be formed thinner. Further, when connecting the joint pins 10 such as clipper hooks, the ring-shaped connection portions 10B protruding from the belt end portions are overlapped, and a rod-like connection rod 11 is inserted into the connection portion 10B to join the connection pins 10. Connect each other (see FIG. 1). At this time, a stainless steel wire rope, various wire strands, or the like can be used as the connection rod 11, so that flexible and strong connection can be achieved. Moreover, when the thickness of the reinforcing cloth 4 is 8 to 20 mm, it is possible to use a whale racing (not shown) in which a metal plate is driven using a driving table and a hook. In this case, a stainless steel stranded wire is used as the connecting rod 11.

  The cover rubber bonding process 500 is a process of bonding the cover rubber 3 peeled in the cover peeling process 100 to the reinforcing cloth 4 and the bonding pin 10 into which the bonding pins 10 are driven (see FIG. 4). At this time, the adhesive 5 is applied to the joint surface of the cover rubber 3 to bond the cover rubber 3 and the reinforcing cloth 4 before vulcanization. By using the adhesive 5 used in the reinforcing cloth bonding step 300, the adhesive 5 can be vulcanized and integrated together with the adhesive 5 when the adhesive 5 is thermocompression bonded.

  In the thermocompression bonding process 600, the upper and lower cover rubbers 3 adhered to the reinforcing cloth 4 are laminated with the pressure-bonding rubber sheets Q via the release paper P to sandwich the conveyor belt 1 and pressed from above and below the pressure-bonding rubber sheets Q. It becomes the process of heat-pressing the conveyor belt 1 with the hot plate R (see FIG. 5). At this time, the pressure-bonding rubber sheet Q is set so as to be thermocompression bonded at a temperature of 120 ° C. and a pressure of 0.4 NPa for 5 minutes. The pressure-bonding rubber sheet Q has an action of uniformly pressing the deformed portion of the belt end. Further, the release paper P prevents the pressure-bonding rubber sheet Q and the cover rubber 3 from being joined by heat.

  Thus, when the end of the conveyor belt 1 is thermocompression bonded, the joining pin 10 driven into the core material layer 2 can be fixed to the integrated interior of the reinforcing cloth 4 and the cover rubber 3.

  In addition, it is not the connecting rod 11 described above that is used when connecting the joining pins 10 in the thermocompression bonding process 600, but a temporary fixing rod 12 reinforced with a piano wire or the like is used to prevent misalignment during crimping. (See FIG. 5). Then, after the thermocompression bonding step 600 is finished, the temporary fixing rod 12 is replaced with the connecting rod 11.

  The end part of the conveyor belt 1 reinforced by the end part reinforcing method of the present invention has the following structure. That is, a reinforcing cloth 4 disposed between the cover rubber 3 and the core material layer 2 at the end of the belt, and a joint that is driven from the reinforcing cloth 4 into the core material layer 2 and connects the conveyor belt 1 in an endless manner. The pin 10 and the cover rubber 3 are integrated by thermocompression bonding (see FIG. 1).

  In addition, the structure of the conveyor belt of this invention is not limited to the example of illustration, A design change in the range which does not change the summary of this invention can be performed freely.

  According to the present invention, a wide conveyor belt 1 to a narrow conveyor belt 1 or a thick conveyor belt 1 to a thin conveyor belt 1 can be used.

P Release paper Q Rubber sheet for pressure bonding R Hot plate for pressing 1 Conveyor belt 2 Core material layer 3 Cover rubber 4 Reinforcement cloth 5 Adhesive 10 Joining pin 10A Tip 10B Connecting part 11 Connecting rod 12 Temporary fixing hook 100 Cover peeling process 200 Cover processing process 300 Reinforcement cloth bonding process 400 Joining pin driving process 500 Cover rubber bonding process 600 Thermocompression bonding process

Claims (6)

In the method for reinforcing the end of the conveyor belt, the cover rubber is laminated on the upper and lower surfaces of the core material layer, and the end of the conveyor belt is endlessly connected with the joining pins.
A cover peeling step for peeling the belt rubber at the end of the belt from the core material layer;
A cover processing step of thinning the tip of the peeled cover rubber and processing it into a substantially wedge shape;
Reinforcement cloth adhesion step of adhering a vulcanized reinforcing cloth with an adhesive after impregnating unvulcanized rubber with the core layer from which the cover rubber has been peeled off,
A joining pin driving step of driving a joining pin from the reinforcing cloth to the core material layer;
Cover rubber bonding process of covering and bonding the peeled cover rubber to the reinforcing cloth and the bonding pin into which the bonding pin is driven,
Heat is applied to the upper and lower cover rubbers bonded to the reinforcing cloth by laminating pressure-bonding rubber sheets via release paper and sandwiching the conveyor belt. A crimping process,
A method for reinforcing an end portion of a conveyor belt, comprising fixing a joining pin driven into a core material layer to an integrated interior of a reinforcing cloth and a cover rubber.   2. The conveyor belt end reinforcing method according to claim 1, wherein in the thermocompression bonding step, the pressure-bonding rubber sheet is thermocompression bonded at a temperature of 120 [deg.] C. and a pressure of 0.4 NPa for 5 minutes.   In the reinforcing cloth adhering step, the adhesive is an adhesive obtained by mixing a rubber material or a resin material with a main agent in which toluene n-hexane is blended and a curing accelerator composed of an ethyl acetate solution at a ratio of 10: 1. The method of reinforcing an end portion of a conveyor belt according to claim 1 to be used. In a conveyor belt in which cover rubber is laminated on the upper and lower surfaces of the core material layer,
A reinforcing cloth disposed between the cover rubber and the core material layer at the end of the belt;
A joining pin which is driven into the core material layer from the reinforcing cloth and connects the conveyor belt in an endless manner;
Is integrated by thermocompression bonding inside the cover rubber,
A joint structure of a conveyor belt, characterized in that a joining pin driven into a core material layer is fixed inside a reinforcing cloth and a cover rubber.   6. The conveyor belt joint structure according to claim 4, wherein a clipper hook whose tip is bent into a substantially bowl shape is used as the joining pin.   The reinforcing cloth is made of a polyester, nylon, or aramid fiber woven cloth impregnated with unvulcanized rubber and then vulcanized to use a reinforcing cloth formed to have a tear strength 2 to 5 times that of a conveyor belt. Item 5. A conveyor belt joint structure according to Item 4.

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