JP2019019002A - Conveyor belt and conveyor device using conveyor belt - Google Patents

Abstract

To provide a conveyor belt whose quality control is easy, with good production efficiency suitable for mass production, while realizing long life, and a conveyor device using the conveyor belt.SOLUTION: A conveyor belt for conveying a conveyed object includes: a rubber layer formed of a rubber composition; and a cord layer in which a core wire is buried along a circumferential length direction of the conveyor belt. On a surface side, of the rubber layer, contacted by the conveyed object, grooves having a concave shape in cross section in a width direction of the conveyor belt are integrally molded along a circumferential direction of the conveyor belt.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a conveying belt that sandwiches and conveys a conveyed product, and a conveying device that uses the conveying belt.

  Examples of the conveyor belt include a conveyor belt that conveys a lightweight object from a heavy object, and a bucket conveyor belt that conveys using a bucket attached to the belt. Further, there is a sandwiching and transporting belt that transports the two belts with the outer peripheral sides facing each other and sandwiching a transported object therebetween. Conventional sandwiching and conveying belts have a structure in which an elastic body such as a sponge having a shape and hardness suitable for a conveyed product is attached to the outer peripheral side of the belt so as not to damage the conveyed product. For example, in Patent Documents 1 to 4, a pair of belts are wound and arranged between pulleys in a state where sponges attached to the outer peripheral side of the belt face each other, and used for working machines or the like. Is disclosed.

Japanese Patent Laid-Open No. 11-275930 Japanese Patent No. 3942727 Tomi No. 3050375 Tomi No.3033352

  The sandwiching and conveying belts listed in Patent Documents 1 to 4 are manufactured by a technique in which an elastic body such as a sponge is attached to a V belt or a flat belt via an adhesive. And when the elastic body stuck to the belt is a sponge, the surface of the sponge (a thin film that comes into direct contact with the transported material) is worn early, and the contents of the sponge are exposed from the location where the film is broken, and the sponge is brought to an early stage. May be destroyed. Further, depending on the biting state of the conveyed product, local tearing of the sponge may occur. Further, in the case of a structure in which sponge, rubber, or the like is attached to the belt, variation in adhesive force within one circumference of the belt may increase depending on the conditions of the attaching operation. For this reason, the part with low adhesive force is peeled off at an early stage of operation, and the nipping and conveying function of the conveyed product is not satisfied. As described above, in the case of a structure in which an elastic body such as sponge or rubber is adhered to the belt, the life of the conveying belt may be shortened.

  In addition, the joint of the elastic body and the elastic body, which is the final form of attaching an elastic body such as sponge or rubber to the belt, relies on the human hand for adjusting the cut length and adjusting the cutting angle of the elastic body. However, it is a work that requires many skills. Furthermore, the elastic body needs to be prepared separately from the production of the belt. As described above, in the case of a structure in which an elastic body such as sponge or rubber is adhered to the belt, labor and cost are burdened for its production, which hinders production efficiency.

  Accordingly, an object of the present invention is to provide a transport belt and a transport device using the transport belt, which realizes a long life while being easy in quality control and having good production efficiency suitable for mass production. To do.

One of the present invention for solving the above problems is a transport belt for transporting a transported object, and a rubber layer formed of a rubber composition;
A core wire layer in which a core wire is embedded along the circumferential direction of the conveyor belt,
On the surface side of the rubber layer that comes into contact with the conveyed product, a groove having a concave shape in a cross-sectional view in the width direction of the conveying belt is integrally formed along the circumferential length direction of the conveying belt. It is a feature.

According to the above configuration, in the conveyor belt, since the concave groove is integrally formed on the surface side where the conveyed object of the rubber layer comes into contact, a separate sponge or the like is prepared to attach the recess to the conveyance surface, Compared with the case of attaching to the rubber layer, productivity can be improved by omitting the step of attaching sponge or the like. In addition, when a sponge or the like is affixed to the rubber layer, there may be variations or unevenness in the adhesive strength of the pasted surface, which may cause the conveyance track to become unstable or cause peeling. Then, since the concave groove is formed integrally with the rubber layer, there is no fear of the left, and it is possible to realize the stabilization of the conveying track and the extension of the life of the conveying belt.
In addition, since the concave groove is arranged on the surface side in contact with the conveyed product, even if the conveyed product is flexible, spherical, or indefinite, Can be transported stably without dropping from the transport surface. In addition, when forming a concave groove by pressing, it is only necessary to prepare and use a convex press board corresponding to the concave shape, and corresponds to the convex shape when forming a convex shape on the rubber layer. Compared with the case where a concave press is prepared and used, quality control is easier and a configuration suitable for mass production can be achieved.

  One feature of the present invention is that the surface of the concave groove is covered with a fiber member in the conveying belt.

  According to the above configuration, since the surface of the concave groove formed in the rubber layer in contact with the conveyed product is covered with the fiber member, the grip force (frictional force) on the conveyed item is increased, and the conveyed item is It is possible to prevent slipping off.

  Moreover, one of the present invention is characterized in that in the conveying belt, an uneven pattern is formed on the surface of the fiber member.

  According to the said structure, by providing an uneven | corrugated shaped pattern on the surface of a fiber member, the grip force (friction force) with respect to a conveyed product can be raised more, and it can prevent that a conveyed product slips down.

  Also, one aspect of the present invention is the above-described conveyor belt, wherein the concave groove is formed with a rubber composition on the surface, and a pattern layer having a concavo-convex pattern formed on the surface is laminated. It is characterized by having.

  According to the above configuration, since the rubber pattern layer having the concave and convex pattern formed on the surface of the concave groove is laminated, the grip force (friction force) against the conveyed product is increased, and the conveyed product However, it can be prevented from slipping down.

  Further, according to one aspect of the present invention, in the conveyance belt, the groove width (w) of the groove in the width direction of the conveyance belt is 50 to 50% of the belt width (W) in the width direction of the conveyance belt. It is characterized by 90%.

  According to the said structure, when conveying a conveyed product, it can receive reliably, and a conveyance function can be improved.

  One feature of the present invention is that the depth (t) of the groove is 5 to 35% of the belt thickness (T) of the conveyor belt.

  According to the said structure, when conveying a conveyed product, it can hold | maintain reliably and a conveyance function can be improved.

  Further, according to one aspect of the present invention, in the transport belt, a thickness (S) from an upper portion of the core wire layer to a bottom of the groove is 10 to 45% of a belt thickness (T) of the transport belt. It is characterized by being.

  According to the said structure, the flexibility of a conveyance belt can be ensured and a conveyance function can be improved.

Moreover, one of the present invention is any one of the above-mentioned two conveyor belts,
A plurality of pulleys around which each of the two conveying belts is wound;
The two conveying belts are wound around the plurality of pulleys in a state where the surfaces on which the concave grooves are formed are opposed to each other, and the conveyed product is sandwiched between the concave grooves facing each other. And a conveying device characterized in that it conveys.

  According to the above configuration, since the two transport belts face each other and the transported object can be sandwiched and transported between the concave grooves, the transported object can be flexible or spherical. Even if it is a thing or an indefinite shape, a conveyed product can be stably and reliably conveyed, without dropping from a conveyance surface.

  It is possible to provide a transport belt and a transport device using the transport belt, which realizes a long life while being easy in quality control and having good production efficiency suitable for mass production.

It is the schematic of the conveying apparatus which concerns on this embodiment. It is a perspective view of the belt for conveyance concerning this embodiment. It is sectional drawing of the belt for conveyance which concerns on this embodiment. It is explanatory drawing of the cross-sectional shape of the belt width direction of a groove | channel. It is explanatory drawing of the various dimensions in a conveyance belt. It is explanatory drawing of the uneven | corrugated shaped pattern of the surface of the jacket cloth coat | covered on the surface of the groove | channel. It is explanatory drawing explaining the conveying method of the conveying apparatus of this embodiment. It is explanatory drawing explaining the conveying method of the conveying apparatus of this embodiment. It is explanatory drawing explaining the conveying method of the conveying apparatus of this embodiment. It is explanatory drawing of the manufacturing method of a conveyance belt. It is sectional drawing of the belt for conveyance which concerns on other embodiment. It is an illustration figure of the texture pattern of the pattern layer which concerns on other embodiment. It is a perspective view of the low edge V belt concerning other embodiments. It is explanatory drawing explaining each dimension of the belt for conveyance in an Example. It is explanatory drawing of the conveying apparatus used for the dynamic function evaluation which concerns on an Example.

(Embodiment)
Hereinafter, a conveyance belt and a conveyance device using the conveyance belt according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, in the transport device 1 of the present embodiment, a pair of transport belts 2 and 2 ′ are driven pulleys 3 and 3 ′ and a driven pulley 4 with their outer peripheral sides facing each other. -It is wound around 4 'and intermediate pulleys 5 and 5'. Then, when the driving pulleys 3 and 3 'are driven to rotate, the conveyed product sandwiched between the outer peripheral surface of the conveying belt 2 and the outer peripheral surface of the conveying belt 2' is moved in the conveying direction shown in FIG. Be transported.

(Configuration of the conveyor belt 2)
A wrapped V-belt is used for the conveying belt 2 (the same applies to the conveying belt 2 '). As shown in FIG. 2 and FIG. 3, the conveying belt 2 includes a rubber layer 21 formed of a rubber composition, and a rubber layer 21 along a belt circumferential length direction and a predetermined width direction in the belt width direction. It is composed of a core wire layer 22 in which core wires 23 arranged at intervals are embedded, and a covering cloth 24 that covers the periphery of the rubber layer 21 over the entire length in the belt circumferential direction.

  Here, in this embodiment, on the outer peripheral side of the rubber layer 21 covered with the covering cloth 24 (that is, on the side of the conveying belt 2 on which the conveyed object comes into contact), the belt width along the belt circumferential length direction. A groove 25 having a concave shape (semi-elliptical shape) in a sectional view in the direction is integrally formed. The groove 25 is located at the center in the belt width direction on the outer peripheral side of the conveyance belt 2. The cross-sectional shape of the concave groove 25 in the belt width direction can be exemplified by a semicircle, a semi-ellipse, a triangle, and a quadrangle as shown in FIG.

  As shown in FIG. 5, the groove width (w) in the belt width direction of the groove 25 is 50 to 90% of the belt width (W) in the belt width direction of the conveying belt 2. Further, the depth (t) (the largest place) of the groove 25 is 5 to 35%, preferably 15 to 30%, of the belt thickness (T) of the conveying belt 2. The thickness (S: upper core) from the top of the core layer 22 to the bottom of the groove 25 is 10 to 45% of the belt thickness (T) of the transport belt 2. For example, when the conveying belt 2 is a C-shaped V-belt (T = 14 mm), the thickness S is 1.4 to 6.3 mm, preferably 2 to 6 mm. The core layer 22 is preferably disposed on the inner peripheral side of the center of the belt thickness of the conveyor belt 2.

More detailed dimensions of the conveying belt 2 are formed in accordance with JIS 6323, JIS 6368, DIN 7753, etc. in Table 1.

  In addition, since the method of holding the conveyed product in the concave groove 25 is adopted instead of sandwiching the convex portion between the convex portion and the convex portion, the belt is adapted to the shape, size, and hardness of the conveyed product. The width (W) and the groove 25 (width (w) × depth (t)) can be selected.

  Further, the cross section in the belt width direction of the conveying belt 2 is a V-shaped cross section, and the left and right side surfaces of the V-shaped cross section covered with the covering cloth 24 are the drive pulley 3, the driven pulley 4, and the intermediate pulley. It becomes a friction transmission surface which contacts the inner wall surface of 5 V groove.

(Rubber layer 21)
Examples of the rubber component of the rubber composition forming the rubber layer 21 include vulcanizable or crosslinkable rubbers such as diene rubbers (natural rubber, isoprene rubber, butadiene rubber, chloroprene rubber, styrene / butadiene rubber (SBR), acrylonitrile). Butadiene rubber (nitrile rubber), hydrogenated nitrile rubber, etc.), ethylene-α-olefin elastomer, chlorosulfonated polyethylene rubber, alkylated chlorosulfonated polyethylene rubber, epichlorohydrin rubber, acrylic rubber, silicone rubber, urethane rubber, fluororubber Etc. can be exemplified. These rubber components may be used alone or in combination of two or more. Preferred rubber components are ethylene-α-olefin elastomers (ethylene-α-olefin rubbers such as ethylene-propylene copolymer (EPM) and ethylene-propylene-diene terpolymer (EPDM)), and chloroprene rubber. . A particularly preferable rubber component is an ethylene-α-olefin elastomer which is excellent in durability against chloroprene rubber and does not contain a halogen. Examples of the diene monomer of EPDM include dicyclopentadiene, methylene norbornene, ethylidene norbornene, 1,4-hexadiene, cyclooctadiene and the like.

  The rubber composition for forming the rubber layer 21 may further include a crosslinking agent such as sulfur and organic peroxide, N, N′-m-phenylene dimaleimide, and quinone, which are usually blended in the rubber, if necessary. Co-crosslinking agents such as dioximes, vulcanization accelerators, fillers such as calcium carbonate and talc, plasticizers, stabilizers, processing aids, colorants, short fibers, and the like may be blended. Short fibers include cotton, polyester (PET, PEN, etc.), nylon (6 nylon, 66 nylon, 46 nylon, etc.), aramid (p-aramid, m-aramid), vinylon, polyparaphenylene benzobisoxazole (PBO) A fiber etc. can be used. These short fibers can be used alone or in combination of two or more.

(Core layer 22)
The core wire layer 22 is a row in which the core wires 23 are aligned with the rubber composition (same as the rubber composition forming the rubber layer 21) along the belt circumferential length direction and at a predetermined interval in the V belt width direction. Are buried in an array. Specifically, a single core wire 23 is spirally wound in the belt circumferential direction and embedded.

  The fiber constituting the core wire 23 is a polyester fiber (polyalkylene arylate fiber, polyethylene terephthalate) mainly composed of C2-4 alkylene arylate such as ethylene terephthalate, ethylene-2,6-naphthalate, etc. from the viewpoint of high modulus. Based fibers, ethylene naphthalate fibers, etc.), synthetic fibers such as aramid fibers, and inorganic fibers such as carbon fibers, and polyester fibers and aramid fibers are preferred. These fibers may be multifilament yarns. The fineness of the multifilament yarn may be 2000 to 10000 denier, preferably 4000 to 8000 denier.

(Cover 24)
The covering cloth 24 has a number of cloth layers of at least 2 ply in order to prevent deterioration of the clamping force due to wear. The covering fabric 24 is preferably a woven fabric, a knitted fabric or the like woven at a wide angle such that the crossing angle between the warp and the weft exceeds 90 ° and is 120 ° or less. The material of the covering fabric 24 is preferably a synthetic fiber or a polyamide fiber that can satisfy the required wear resistance (fiber member).

  The jacket cloth 24 covers the surface of the groove 25 formed on the outer peripheral side of the rubber layer 21. Here, an uneven pattern is formed on the surface of the covering cloth 24 covering the surface of the groove 25. Specifically, an uneven pattern is formed by having countless protrusions 241 having a height of 0.2 mm to 5 mm shown in FIG.

  As described above, since the surface of the groove 25 having a concave shape is covered with the covering cloth 24 (fiber member), the grip force (frictional force) on the conveyed product is increased, and the conveyed product is conveyed to the conveying belt 2. Can be prevented from slipping off.

  Furthermore, the surface of the outer covering 24 is formed with a concavo-convex pattern, so that the gripping force (frictional force) on the conveyed product is further increased and the conveyed item is prevented from slipping off from the conveying belt 2. can do.

(Conveying method)
In the transport device 1, since the groove 25 of the transport belt 2 and the groove 25 'of the transport belt 2' are opposed to each other, a space for holding the transported object is formed between the groove 25 and the groove 25 '( (See FIG. 7). Then, in the transport device 1, the driven pulleys 3 and 3 'are rotationally driven, whereby the transported object sandwiched between the groove 25 of the transport belt 2 and the groove 25' of the transport belt 2 'is illustrated in FIG. 1 is conveyed in the conveyance direction shown in FIG.

  According to the conveying apparatus 1 using the conveying belts 2 and 2 ′ of the present embodiment, the conveyed product is a flexible solid material, the conveyed product is spherical, or the conveyed product is an indeterminate shape. Even if it exists (see FIG. 8), the conveyed product can be stably held in the center of the concave (semi-elliptical) grooves 25 and 25 ′ formed on the outer peripheral side of the conveying belts 2 and 2 ′. In addition, the conveyed product can be stably and reliably conveyed without dropping from the conveying belts 2 and 2 '.

  Further, in the transport apparatus 1 of the present embodiment, as shown in FIG. 9, the wrapping paper on which the powdery substance (medicine etc.) is placed is attached to the edge 26 at both ends of the transport belt 2 and the transport belt 2 ′. It is possible to carry it while being sandwiched between the edges 26 ′ at both ends. In this case, since a sealed space is formed between the wrapping paper and the groove 25 ′ of the transport belt 2 ′, the powdery substance placed on the wrapping paper can be transported in a sealed state.

(Method for manufacturing the conveyor belt 2)
A method for manufacturing the conveying belt 2 will be described.

  First, the rubber sheet for the inner circumference side, which has been processed into a belt having a predetermined length, is wound around the outer circumference of a circular molding mantle to hold the inner circumference rubber sheet in a circular shape. Let

  Next, along with the rotation of the molding mantle, the core wire 23 fed out from the bobbin is spirally wound around the outer periphery of the inner peripheral side rubber sheet wound around the outer periphery of the molding mantle.

  Next, an unvulcanized outer peripheral side rubber sheet processed into a belt having a predetermined length is wound on the outer peripheral side of the core wire 23. Thereby, a cylindrical unvulcanized belt molding is created.

  Next, the cylindrical unvulcanized belt molded body is cut into a predetermined width, processed into a V-shape in cross-section, and covered with a covering cloth 24 to be a plurality of unvulcanized belts that serve as a prototype of the conveying belt 2 Create a compact. Then, as shown in FIG. 10, each unvulcanized belt molded body has a press lower plate in which a plurality of V grooves are formed, and a plurality of semi-elliptical convex portions corresponding to the V grooves in the press lower plate. It is placed between the press and the upper plate formed. At the time of vulcanization, each unvulcanized belt molded body is pressed between the press upper plate and the press lower plate, and a concave (semi-elliptical) groove 25 is formed on the outer peripheral surface side of each unvulcanized belt molded body. Is molded.

  Through the above steps, a groove 25 having a concave (semi-elliptical) cross-sectional view in the belt width direction is integrally formed along the belt circumferential length direction on the outer circumferential side of the conveying belt 2 covered with the jacket cloth 24. A plurality of conveyor belts 2 are manufactured.

  According to the conveyor belt 2 having the above-described configuration, the concave groove 25 is integrally formed on the surface side of the conveyor belt 2 (rubber layer 21) that comes into contact with the object to be conveyed. Compared with a case where a separate sponge or the like is prepared and affixed to the rubber layer, productivity can be improved by omitting the step of attaching the sponge or the like. In addition, when a sponge or the like is affixed to the rubber layer, there may be variations or unevenness in the adhesive strength of the pasted surface, which may cause the conveyance track to become unstable or cause peeling. Then, since the concave groove 25 is formed integrally with the rubber layer 21, there is no fear of the left, and it is possible to realize the stabilization of the transport track and the extension of the life of the transport belt 2.

  In addition, since the concave groove 25 is disposed on the surface side in contact with the conveyed product, even if the conveyed product is flexible, spherical, or indefinite, The transported object can be stably transported without dropping from the transport surface. Further, when the concave groove 25 is formed by pressing, it is only necessary to prepare and use a press plate having a convex portion corresponding to the concave shape, and when the convex shape is formed on the rubber layer, Compared with the case where a concave press board corresponding to the shape is prepared and used, quality control is easier and a configuration suitable for mass production can be achieved.

(Other embodiments)
In the above embodiment, as shown in FIG. 5, the core wire layer 22 is arranged such that the core wires 23 are arranged in a line on the inner peripheral side from the center of the belt thickness of the transport belt 2. However, as shown in FIG. 11, the core wire layer 122 has a core wire 123 having a smaller wire diameter than the core wire 23 of the above embodiment on the inner peripheral side of the center of the belt thickness of the transport belt 102. It may be formed so as to be arranged over a plurality of rows (three rows in FIG. 11). As shown in FIG. 11, in the transport belt 102, the core wire layer 122 in which the core wires 123 are arranged in three rows is laminated on the bottom of the transport belt 102. The thickness (s) is a maximum of 10 mm.

  Moreover, in the conveyance belt 2 of the said embodiment, although the uneven | corrugated shaped pattern is formed in the surface of the jacket cloth 24 which has coat | covered the surface of the groove | channel 25, it is not restricted to this, The groove | channel 25 A rubber pattern layer 28 having a concavo-convex pattern formed on the surface thereof may be laminated on the surface of the surface, instead of the jacket cloth 24. The rubber pattern layer 28 is made of low-hardness rubber (rubber hardness A35 to 65 / JIS K 6253), and has an infinite number of protrusions 241 having a height of 0.2 mm to 5 mm on the surface. Thus, a concavo-convex pattern is formed (see FIG. 6). An example of the formation of the uneven pattern is embossing (embossing). There are a variety of texture patterns formed by this texture processing, and examples thereof are shown in FIG.

  According to the above configuration, since the rubber pattern layer having the uneven pattern formed on the surface is laminated on the surface of the groove 25, the grip force (friction force) against the conveyed product is increased, , And can be prevented from slipping off from the conveyor belt.

  In the above-described embodiment, the wrapped V belt in which the covering cloth 24 is also coated on both side surfaces of the conveying belt 2 has been described as an example. However, as the conveying belt 2, a low edge V belt shown in FIG. Thus, the structure by which the jacket cloth 24 is not coat | covered on the both sides | surfaces may be sufficient. Further, the conveying belt 2 is not limited to the V belt, and various belts such as a flat belt and a V-ribbed belt can be employed.

  Next, conveyance belts of Examples 1 to 12, Reference Examples, and Comparative Examples shown in Tables 3 to 5 in which the dimensions of the conveyance belt shown in FIG. 14 were variously changed were produced. And the produced various belts for conveyance were wound around the conveying apparatus shown in FIG. 15, and dynamic function evaluation was performed. Specifically, as shown in FIG. 15, a test for conveying 100 brussels sprouts is performed using a conveying device on which various conveying belts are wound, and until the brussels sprouts are conveyed and collected in a collection bucket. The aspect of was evaluated. For example, the proportion of brussels sprouts dropped (see FIG. 15) in the middle of conveyance, the proportion of crushing of the conveyed product (brussels sprouts), the proportion of missed reception of brussels cabbage in the clamping part (see FIG. 15), the delivery of brussels sprouts to the collection bucket The rate of leakage (see FIG. 15) was evaluated. Table 2 shows the evaluation conditions for the dynamic function evaluation using the above-described conveying device around which the various conveying belts are wound.

  Further, in the determination (evaluation) of each conveyance belt in Tables 3 to 5, when all the items of the four evaluations (ratio) were less than 3% (0 to 2%), it was determined as “◎”. When there was at least one item of 3% or more among the four evaluations, it was determined as “◯”. When there was at least one item of 10% or more among the four evaluations, it was determined as “Δ”. When there was at least one item of 50% or more among the four evaluations, it was determined as “x”.

(Evaluation conditions)

(Evaluation at w / W = 90%: When the position of the core wire in the thickness direction of the conveying belt is constant and the groove depth (t) is varied)

-"Comparative example" with no groove (t = 0) was a result that the brussels sprouts could hardly be conveyed and could not be used.
-In the reference example, even if there was a groove, it was too small (t = 1 mm), so the conveyance function was insufficient.
“Example 1”, “Example 2”, and “Example 3” sufficiently satisfied the transfer function.
・ "Example 4" has a deeper groove than other Examples 1 to 3, and has few pinching contacts between the conveyor belt and the Brussels sprouts, so the reception of the Brussels sprouts and delivery to the bucket (throwing) is not stable. However, it was at a usable level.

(Evaluation at w / W = 50%: When the position of the core wire in the thickness direction of the conveyor belt is constant and the groove depth (t) is varied)

“Example 5”, “Example 6”, and “Example 7” sufficiently satisfied the transfer function.
・ "Eighth Example" has a deeper groove than other Examples 5-7, and there are few pinching contacts between the conveyor belt and brussels sprouts, so the reception of brussels cabbage and delivery to the bucket (throwing) is stable. None, but at a usable level.

(Evaluation at w / W = 70%: When the depth (t) of the groove is constant (t = 4.2 mm) and the position of the core in the thickness direction of the conveyor belt is varied)

“Example 9”, “Example 10”, and “Example 11” sufficiently satisfied the transfer function.
-Since "Example 12" has a core wire position on the inner peripheral side of the conveyor belt as compared with other Examples 9 to 11, the winding property to the pulley (flexibility of the conveyor belt) was not good. It was a usable level.

DESCRIPTION OF SYMBOLS 1 Conveyance apparatus 2 * 2 'Conveying belt 21 Rubber layer 22 Core wire layer 23 Core wire 24 Outer cloth 25 Groove 3/3' Drive pulley 4/4 'Driven pulley 5/5' Intermediate pulley

Claims (8)

A transport belt for transporting a transported article, a rubber layer formed of a rubber composition;
A core wire layer in which a core wire is embedded along the circumferential direction of the conveyor belt,
On the surface side of the rubber layer that comes into contact with the conveyed product, a groove having a concave shape in a cross-sectional view in the width direction of the conveying belt is integrally formed along the circumferential length direction of the conveying belt. A characteristic conveyor belt.   The conveyor belt according to claim 1, wherein a surface of the concave groove is covered with a fiber member.   The conveyor belt according to claim 2, wherein an uneven pattern is formed on the surface of the fiber member.   The conveyance according to claim 1, wherein a pattern layer is formed on the surface of the concave groove, the pattern layer being formed of a rubber composition and having an uneven pattern formed on the surface. Belt.   The groove width in the width direction of the conveyance belt of the groove is 50 to 90% of the belt width in the width direction of the conveyance belt, according to any one of claims 1 to 4. The belt for conveyance as described.   The conveyor belt according to claim 1, wherein a depth of the groove is 5 to 35% of a belt thickness of the conveyor belt.   The conveyance according to any one of claims 1 to 6, wherein a thickness from an upper portion of the core wire layer to a bottom of the groove is 10 to 45% of a belt thickness of the conveyance belt. Belt. Two conveying belts according to any one of claims 1 to 7,
A plurality of pulleys around which each of the two conveying belts is wound;
The two conveying belts are wound around the plurality of pulleys in a state where the surfaces on which the concave grooves are formed are opposed to each other, and the conveyed product is sandwiched between the concave grooves facing each other. And a conveying device.