JPH051714U - Conveyor belt joint structure - Google Patents

Abstract

(57) [Abstract] [Purpose] At the joint part of a conveyor belt in which a core canvas and an elastic layer are laminated for endlessness, the rising and cracking phenomena that frequently occur at the joint part are suppressed and the life of the belt is extended. Intended. [Structure] In order to make the conveyor belt (1) endless, a twill weave or satin weave disposed at at least one joint of both end joints of core canvases (3) and (5) forming a part of the belt. A reinforcing canvas (7) having a weave and being highly elastic and flexible is used, and its weave direction is made to be substantially close to the belt endless angle formed by the end (6) of the core canvas, including the same angle. And stick it.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  This invention relates to the structure of the conveyor belt joint, especially with a canvas as the core, Both of the core belts have a conveyor belt with an elastic layer of rubber or synthetic resin on one side. The present invention relates to a joint structure for endlessness.

[0002]

[Prior art]

  As a joining method for endless conveyor belts, vulcanization joint method and metal fittings The joint method is well known.   Of these, the vulcanized joint method is that the belt joining ends are vertically In response, a step shape is formed, and both ends of these step shapes are overlapped in a wide area in an interview shape. Overlap method for unifying and bonding or vulcanizing, and both for belt joining Step shapes are formed corresponding to the upper and lower phases at the ends, respectively There is a butting method in which the ends are butted against each other and bonded or vulcanized together.

[0003]   Both the overlap method and the butt method, the canvas that forms the core of the belt At the joint part of the core, specifically, the overlap method In the end part, or in the butt method, the occurrence of frequent occurrences at both ends of the butt of the core body In order to prevent the rise phenomenon or cracking phenomenon, The warp and weft threads are made of nylon, polyester, cotton, vinylon, etc. on the body canvas surface. A means for adhering a plain weave reinforced canvas that is woven to reinforce the joint is adopted. .

[0004]

[Problems to be solved by the device]

  For reinforcing the belt joint using the plain weave canvas, wind the belt. When the pulley diameter is small, the bending radius of the belt naturally becomes smaller, and the belt Although it stretches a lot, it does not use nylon or cotton that is attached to the belt joint. The stretch of any plain weave reinforced canvas itself cannot keep up with the stretch of the belt. Cracks occur in the reinforced canvas and the rising phenomenon occurs at the tip of the joint between the core and the canvas. Problems such as weakening the joints and failing to achieve the intended purpose Is still left.

[0005]   The idea is that the reinforced canvas itself is elastic enough to adapt to the stretching of the belt. Uses a canvas that has flexibility and allows the reinforcing canvas itself to exert its full extension force. Considering the endless angle direction formed at both ends of the belt core canvas By selecting the sticking angle, the reinforcement effect that can sufficiently surpass the conventional plain weave reinforced canvas is exhibited. It is an object of the present invention to provide a reinforcement structure for a conveyor belt joint which can be formed.

[0006]

[Means for Solving the Problems]

  In order to achieve the above object, the structure of the conveyor belt joint according to the present invention is as follows. It is as below.   A rubber or synthetic resin elastic layer must be laminated on at least one side of the core canvas. Of the conveyor belt that is located at both ends for endless belt At the joint, warp yarn consisting of normal yarn and elastic yarn alone or at least a part of elastic yarn Stretching with twill weave or satin weave woven with the weft threads used A fabric with a fabric reinforcement, and the weave direction of the belt is formed at the joints at both ends of the core canvas. It is characterized in that they are attached close to each other, including the same angle as the endless angle.   And this reinforcing canvas is used for the joints of all-core canvas or a part of core-can canvas. In some cases, especially the reinforcing canvas attached to the joint part of the core canvas exposed on the belt surface. If the tip of the corner of the corner has a right angle or an acute angle, a cutting allowance shall be provided on that part. Is characterized by.

[0007]

【Example】

  Next, a concrete example of the structure of the conveyor belt joint part in which the present invention is implemented is shown in the drawing. Will be explained.   FIG. 1 is a side view of a belt joining portion adopting the overlap method, and FIG. 2 is the same. FIG. 3 is a bottom view of the belt, and FIG. 3 shows a belt formed in a step shape before joining. It is a perspective view of an end.

[0008]   This conveyor belt (1) has an upper cover rubber layer (2) and an embedded core that are arranged in this order from above. Consists of a laminate of canvas (3), intermediate rubber layer (4) and bottom canvas (5) on the bottom surface As shown in FIG. 3, the joining right end of the belt has an upper cover rubber layer (2). From the embedded core canvas (3) and the intermediate rubber layer (4) from the bottom canvas (5), respectively. It is removed and has a step shape.   On the other hand, the left end of the belt joint is in the opposite direction to that of FIG. Adhesive is applied to the end joints, and embedded core canvas (3) (3) And the bottom canvas (5) (5) comrades are stuck together in an overlap shape, and on the bottom of the belt. The twill weave or satin weave on the overlap joint of the bottom canvas (5) Reinforcing canvas (7) having a diagonal weave and being highly elastic and flexible, Bell whose weave (a) is limited to the range of 0 ° to 60 ° of the joint end (6) of the core canvas Bond the endless angles, including the same angle, with a near-normal temperature adhesive and approximately To be done.

[0009]   Note that FIG. 4 shows another embodiment, in which the same overlapping buried structure shown in FIG. At the joint of the core canvas (3) (3) as well, there is a stretched weave having twill or satin weave. The shrinkable reinforcing canvas (7) is also limited to the diagonal weave (a) within the range of 0 ° to 60 °. Including the same angle in the belt endless angle of the joint part (6) of the core canvas Adopting a structure in which they are attached close to each other, it is possible to further strengthen and strengthen the belt joint Is. However, in this example, the stretchable reinforcing canvas (7) was subjected to RFL treatment. After that, using the one that has been glued (coated) with rubber in advance, the rubber layer (2) ( It is necessary to secure the adhesive strength with 4).

[0010]   Also, when attaching the stretchable reinforcing canvas (7) while it is exposed on the back side of the belt, When the corners of the reinforcing canvas (7) have a right angle and an acute angle, the tip corners should be Cut to form a cutting allowance (8) (see Fig. 2), which results in a corner of the reinforcing canvas (7). Reinforcement canvas (7) attached to prevent the formation of sharp corners at the corners. It is possible to effectively prevent the occurrence of the peeling phenomenon described in 5).

[0011]   Next, regarding twill weave reinforced canvas (7) as one of the stretchable canvas with diagonal weave As will be described in more detail with reference to FIG. 11, the twill weave is also known as the twill weave, and the weft (X ) Is a polyurethane elastic yarn (trade name spandex) alone or polyurethane Elastic thread and nylon, vinylon, polyester, acrylic or cellulose thread Doto mixed yarn is used, while warp yarn (Y) is made of nylon, vinylon, polyester, Woven with a single yarn such as acrylic, the twill weave weave direction (a) is the same as the warp yarn (Y) Two crossing methods with the thread (X), that is, the warp thread comes out above the weft thread, or conversely, the warp thread is the weft thread. Organization that is the intersection of "float" and "sink" created by the method of entering below Depending on how the dots are arranged in the longitudinal and transverse directions of the fabric, in what order and combination, Various properties are generated in terms of elasticity and flexibility, and the weft direction (a) is changed variously. It is possible to produce fabrics that can be squeezed.   The longitudinal direction of the twill weave reinforced canvas (7) indicated by the arrow (b) in the drawing is the warp (Y ) Direction, and has almost no elasticity. Therefore the longitudinal direction of the belt and the reinforcing canvas (7) Matching the longitudinal direction (b) of the reinforced canvas (7) should be avoided. B) is the same as the belt endless angle formed at the joint end of the core canvas (6) Including each of the parts, make sure that the In addition, it is possible to secure extensibility in the longitudinal and width directions of the belt over many directions. It

[0012]   FIG. 5 is a side view of a belt joining portion that adopts a butt method, and FIG. 6 is the same belt. FIG.   The belt shown in FIGS. 5 and 6 is the same as the conveyor belt shown in FIGS. 1 and 2. Both ends of the embedded core canvas (3) (3) and bottom canvas (5) (5) have the same structure The joints are joined together by a butt joint method and are located on the back side of the belt. Twill weave or satin weave at the joint of the joined bottom canvas (5) (5) Reinforced canvas (7) with elasticity and flexibility, whose diagonal weave (a) is bottom canvas (5) For the belt endless angle formed by the joint ends (6) of both ends of (5) Bonding is performed with a room-temperature adhesive in the direction of approaching, including the same angle.

[0013]   FIG. 7 shows another embodiment of FIG. 5, in which the butt-buried core body canvas (3) (3) is joined. Elastic reinforced canvas (7) with rubber glue (coating treatment) after RFL treatment And the diagonal weave (a) of the belt endless angle including the same angle Conveyor belt that is attached and adhered, and the joints of the belt are adhered and reinforced at multiple locations. Is.

[0014]   FIG. 8 is a side view of a belt joining portion showing still another embodiment adopting a butt joint method. Is.   The belt shown in FIG. 8 has two layers of embedded core canvas (3) (3), and three layers of belt. A rubber layer, that is, an upper cover rubber layer (2), an intermediate rubber layer (4) and a lower cover rubber layer ( 9) In the joint portion of the two-layer core canvas (3) (3), (3) (3) butted in Reinforcement with rich stretchability and flexibility that has a diagonal weave of twill or satin weave, respectively The canvas (7) (7) has its oblique weave (a) attached to the joint end (6) of the embedded core canvas. Including the same angle in the belt endless angle formed by It is attached and bonded with an adhesive. The folding reinforcement canvas (7) (7) was treated with RFL. After the treatment, rubber gluing (coating treatment) is performed in advance, and the reinforcing canvas (7) (7) and The adhesive strength with the rubber layers (2) and (9) is secured.

[0015]   (Experiment 1)   Next, the plain weave reinforced canvas is applied to the joint between the conveyor belt and the core canvas in which the present invention is implemented. Reinforcement of a conventional conveyor belt with adhesive reinforcement to find the number of bends leading to peeling A running test was performed and the results are detailed below.   The conveyor belt used in this test is one layer of buried core canvas as shown in FIG. It has a bottom and a bottom canvas. In the reinforced canvas attached, the twill weave reinforced canvas of the conveyor belt of this invention is A mixed twisted yarn of Ron warp yarn and nylon and polyurethane elastic yarn (spandex) The plain weave reinforced canvas of conventional conveyor belts is woven with the warp and weft threads. It is woven with nylon thread.   The running tester comprises a drive pulley (Dr), a tail pulley (Dn) and a 3 shown in FIG. Each tension pulley (Ten) is composed of a total of 5 pulley groups, each pulley diameter Is set to 200 mm and the belt speed is set to 150 m / min. .   The experimental results are shown in Table 1 below.

[0016]

[Table 1]

[0017]   (Experiment 2)   The conveyor belts used for this test both had three layers of buried core canvas and bottom canvas. The butt joint method of the core canvas is adopted, and it is attached only to the joint surface of the bottom canvas. The twill weave reinforced canvas according to the present invention and the plain weave reinforced canvas according to the conventional product described above are The same woven canvas as described in 1.   The running tester comprises a drive pulley (Dr), a tail pulley (Dn) and It consists of a total of four pulley groups, two tension pulleys (Ten). Both the diameter is 350 mm and the running speed is 150 m / min. It   The experimental results are shown in Table 2 below.

[0018]

[Table 2]

[0019]   From the above two experimental results, the elastic reinforcing canvas attached to the joint part of the core canvas is Regardless of whether the joining method is the overlap method or the butt method, Compared with the reinforced structure of woven reinforced canvas, in the case of twill woven canvas adopted in this invention, It was confirmed that the bending life was about 8.5 times.

[0020]

[Effect of device]

  Both ends contact for endlessness of the core canvas forming a part of the conveyor belt of this invention As a reinforcing canvas to be attached to the joint, a stretched fabric with a twill weave or satin weave Reinforcing canvas with high shrinkability and flexibility is used, and the weave direction of the reinforcing canvas is joined to the core canvas. By approximating the belt endless angle formed at the end, including the same angle, , To effectively and effectively use the elasticity and flexibility of the reinforced canvas. And the joint portion can sufficiently follow the stretching and bending of the belt itself. The phenomenon of rising of the belt joint, which occurred frequently at the joints of this type of belt, Has a remarkable effect of suppressing the occurrence of the lateral cracking phenomenon for a long period of time.   In addition, the use of a woven cloth having a diagonal weave for the reinforcing canvas means that the joint end of the core canvas is The sticking work with the texture close to the endless angle makes the texture of the reinforcing canvas even more By using it as a guideway, the cutting work will also be easier and Secondary effects can be expected.

[Brief description of drawings]

FIG. 1 is a side view of a belt joining portion adopting an overlap method for the joining portion of the present invention.

FIG. 2 is a bottom view of the belt joint portion shown in FIG.

FIG. 3 is a perspective view of a belt joining right end portion formed in a step shape before joining.

FIG. 4 is a view corresponding to FIG. 1 showing another embodiment.

FIG. 5 is a side view of a belt joining portion adopting a butt method for the joining portion of the present invention.

FIG. 6 is a bottom view of the belt joint portion shown in FIG.

FIG. 7 is a view corresponding to FIG. 5 showing another embodiment.

FIG. 8 is a diagram corresponding to FIG. 5 showing still another embodiment adopting a butt matching method.

FIG. 9 is a schematic front view of the belt running test device used in Experiment 1 for testing the peel strength of the reinforcing canvas.

FIG. 10 is a schematic front view of the belt running test device used in Experiment 2 as well.

FIG. 11 is a plan view of a part of a stretchable twill weave reinforced canvas having a diagonal weave used in the present invention.

[Explanation of symbols]

1 conveyor belt 2 Upper cover rubber layer 3 buried core canvas 4 Intermediate rubber layer 5 bottom canvas 6 Canvas joint end 7 Stretch reinforced canvas 8 cut fee 9 Lower cover rubber layer B stretch reinforced canvas texture

Claims (7)

[Scope of utility model registration request] 1. A conveyor belt comprising a core canvas and an elastic layer made of rubber or synthetic resin laminated on at least one surface of the core canvas. A stretchable reinforcing canvas having a diagonal weave formed by weaving a weft containing elastic threads is included, and the weave direction includes the same angle in the belt endless angle formed in the canvas joint, The structure of the conveyor belt joint, which is characterized in that it is attached close to each other. 2. The stretchable reinforcing canvas having a twill weave is a twill weave,
The structure of the conveyor belt joint according to claim 1, wherein the structure is made of one of the satin weaves. 3. The conveyor belt joint structure according to claim 1 or 2, wherein the joint portion of the core canvas adopts either an overlap method or a butt method. 4. The structure of the conveyor belt joint portion according to claim 1, wherein the stretchable reinforcing canvas is attached only to the joint portion of the bottom canvas of the belt. 5. The conveyor belt according to any one of claims 1 to 3, wherein the stretchable reinforcing canvas is attached only to the joint portion of the embedded core canvas inside the core canvas of the core canvas forming the belt. Structure of the joint. 6. The structure of the conveyor belt joint portion according to claim 1, wherein the stretchable reinforcing canvas is adhered to the joint portions of all the core canvases constituting the belt. 7. The cutting allowance is formed at a right angle or an acute-angled tip end of the elastic reinforcing canvas attached to the core canvas exposed on the belt surface. The structure of the conveyor belt joint according to any one of the above.