JP2009084011A - Conveying belt and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress lowering of a holding force of a conveying article by accurately bonding a cushion body to a belt body. <P>SOLUTION: Conveying belts 1, 2 are equipped with belt body 3 which endlessly extends and where the surface of the belt inside is contacted to a pulley, and the cushion body 5 bonded on the surface of the belt outside in the belt body 3, and constituted so as to convey the conveying article by holding it by the cushion body 5 opposed to each other by winding the conveying belts to two sets of pulley group composed of a plurality of pulleys. A projection part 21 projecting to the other side is formed on one side of the belt body 3 and the cushion body 5, and a recessed part 22 for fitting to the projection part 21 is formed on the other side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a conveying belt configured to nipping and conveying a conveyed object by surfaces of the belt outer sides facing each other by winding each of two sets of pulley groups including a plurality of pulleys, and a method for manufacturing the same. It is about.

  2. Description of the Related Art Conventionally, there is known a transport device that is mounted on a plant harvester that harvests plants such as licorice and vegetables so as to automate harvesting operations.

  In this conveying apparatus, two conveying belts (hereinafter also simply referred to as belts) having the same cross-sectional structure are parallel to each other and run in parallel while being in contact with each other on the outer surface of the belt (belt outer surface). The belt outer surface is wound around two pulley groups consisting of a plurality of pulleys, both belts run in the same direction and at the same speed, and both belts have the same moving direction and moving speed. A plant (conveyed object) is taken in between and held between the belt outer surfaces of both belts, and the plant is pulled out from the ground and conveyed by running of the belt.

  Each of the belts includes an endless belt body whose inner surface is in contact with the pulley, and a cushion body formed on the belt outer surface of the belt body, and the plant is sandwiched by the opposing cushion bodies. It is comprised so that it may convey.

  As a method for suppressing the early breakage of the conveying belt, Patent Document 1 discloses that both side surfaces of the cushion body in the belt width direction are shifted to the center side in the belt width direction from both side surfaces of the belt body in the belt width direction, or By tilting toward the center in the belt width direction, even if the cushion body is deformed in the belt width direction, it prevents the belt body from protruding in the belt width direction, and the cushion body interferes with and damages the members around the belt. Preventing is disclosed.

  By the way, as a method of forming the conveying belt, there are a method in which the belt main body and the cushion body are integrally formed by vulcanization, and a method in which the cushion body is fused and formed on the belt main body. According to the formation method, the cushion body such as foamed sponge having relatively low hardness and bubbles has a relatively high heat shrinkage and a large volume change due to heating. It is difficult to form into a desired shape.

In addition, as a method for forming the conveyance belt, a method in which the belt main body and the cushion body are separately formed and the belt main body and the cushion body are bonded together is known. The bonding surfaces of the belt body and the cushion body are usually formed flat over the entire surface. According to this method, since it is not necessary to heat the cushion body, the thermal contraction of the cushion body can be suppressed.
JP 11-299323 A

  However, even if it is a method of bonding the belt body and the cushion body to form the conveyor belt, as described above, since the entire bonding surface of the belt body and the cushion body is formed flat, When the belt body and the cushion body are bonded together, the cushion body is likely to meander by shifting in the belt width direction, and it is difficult to bond the cushion body to the belt body at a desired position with high accuracy.

  When the cushion body meanders with respect to the belt body and is pasted from the desired position in the belt width direction, the belts of a pair of belts that run side by side when holding the conveyed product by the conveying device Since the area where the outer surfaces deviate from each other in the belt width direction and face each other (the area where both belts sandwich the conveyed product) decreases, the pressure (pinch force) applied to the conveyed product by the pair of belts from both sides decreases.

  In particular, as shown in FIG. 14, when the belt outer surface 100 of the cushion body 102 is not formed flat, the position of the cushion body 102 is shifted in the belt width direction with respect to the belt body 101 (103 in FIG. 14). Shows the cushion body 102 in a state of being bonded to the belt main body 101 without being displaced), and the holding force of the conveyed product tends to vary in the belt width direction. That is, as shown in FIG. 15, the nipping force of the conveyed product is remarkably reduced in the portion 104 in the belt width direction between the parallel running belts.

  This invention is made | formed in view of such various points, and the place made into the objective is bonding together a belt main body and a cushion body with sufficient precision, and suppressing that the pinching force of a conveyed product falls.

  In order to achieve the above object, in the present invention, one of the belt main body and the cushion body is formed with a protruding portion that protrudes to the other side, and the other is formed with a concave portion that fits into the protruding portion.

  Specifically, a conveyor belt according to the present invention includes an endless belt body whose inner surface is in contact with a pulley, and a cushion body bonded to the outer surface of the belt body. A conveyor belt configured to sandwich and convey a conveyance object by a cushion body opposed to each other by being wound around two pulley groups each including the pulley, the belt main body and the cushion On one side of the body, a protruding portion that protrudes to the other side is formed, and on the other side, a concave portion that fits into the protruding portion is formed.

  The protrusion may be formed on the belt body, and the recess may be formed on the cushion body.

  It is preferable that the protrusion extends over the entire belt.

  It is preferable that the protrusion has a rectangular cross section in the belt width direction.

  It is preferable that the protruding portion has both side surfaces perpendicular to the belt width direction, and a cross section in the belt width direction at a tip portion of the protruding portion in the protruding direction is formed in an arc shape.

  It is preferable that the protrusion has a triangular cross section in the belt width direction.

  The projecting portion preferably has a cross section in the belt width direction formed in an arc shape.

  It is preferable that the protrusions are formed so that the distance between the two side surfaces in the belt width direction gradually increases toward the protrusions in the protrusion direction.

  It is preferable that the protruding portion is formed such that the protruding portion of the protruding portion protrudes on both sides in the belt width direction.

  In addition, a method for manufacturing a conveyor belt according to the present invention includes: a belt body that extends endlessly and whose inner surface is in contact with a pulley; and a cushion body that is bonded to the outer surface of the belt in the belt body. A method of manufacturing a conveyor belt configured to be conveyed while being sandwiched between two sets of pulleys, each of which is sandwiched by a cushion body facing each other. A belt member forming step of forming a protrusion protruding to the other side with respect to one of the main body and the cushion body and forming a recess for fitting to the protrusion with respect to the other, the belt main body, and the belt body A bonding step of bonding the cushion body and fitting the concave portion to the protruding portion.

-Action-
Next, the operation of the present invention will be described.

  One of the belt main body and the cushion body is formed with a protruding portion that protrudes to the other side, and the other is formed with a recess that fits into the protruding portion. For example, a protrusion is formed on the belt body and a recess is formed on the cushion body. Accordingly, the cushion body is positioned with respect to the belt main body by the fitting of the protruding portion and the concave portion, so that the cushion body is prevented from shifting in the belt width direction with respect to the belt main body. As a result, the belt main body and the cushion body are bonded together with high accuracy, and a decrease in the holding force of the conveyed product is suppressed.

  In addition, since the bonding area of the cushion body to the belt body increases, the adhesion between the belt body and the cushion body is enhanced. As a result, when the conveyed product is nipped and conveyed, the cushion body is prevented from peeling off from the belt body.

  In particular, when the protruding portion extends over the entire belt circumference, the protruding portion and the recessed portion are fitted to each other over the entire belt circumference, so that the cushion body may shift in the belt width direction with respect to the belt main body. Suppressed all around the belt. As a result, the belt main body and the cushion body are bonded together with higher accuracy, and the holding force of the conveyed product is further suppressed from decreasing.

  When the protrusion is formed in a rectangular cross section, the protrusion can be easily formed. In addition, when the belt body and the cushion body are bonded to each other as compared with the case where the protrusion is formed in a triangular cross section or a circular arc cross section, the cushion body is caused by the mutual fitting of the protrusion and the recess. Since the positioning is more accurately performed with respect to the belt main body, the cushion body is further prevented from shifting in the belt width direction with respect to the belt main body, and the belt main body and the cushion body are more firmly bonded.

  Even when the protruding portion has both side surfaces perpendicular to the belt width direction and the tip end portion is formed in a circular arc shape, the protruding portion can be easily formed and The displacement of the cushion body in the belt width direction is further suppressed, and the belt body and the cushion body are more firmly bonded.

  Even when the protruding portion is formed in a triangular cross section, the protruding portion can be easily formed. Furthermore, the belt body and the cushion body are aligned and easily bonded together.

  Even when the protruding portion is formed in a circular arc shape, the protruding portion can be easily formed, and the belt body and the cushion body are aligned and easily bonded together.

  When the protrusions are formed so that the distance between the both side surfaces in the belt width direction gradually increases toward the tip, the cushion body is fixed to the belt body by the fitting of the protrusions and the recesses. Since the positioning is further accurately performed, the cushion body is prevented from being displaced in the belt width direction as much as possible with respect to the belt body, and the belt body and the cushion body are further firmly bonded.

  Even when the tip of the projecting portion projects on both sides in the belt width direction, the cushion body is more accurately positioned with respect to the belt body. The belt body and the cushion body are more firmly bonded to each other as much as possible.

  Further, according to the method for manufacturing a conveying belt according to the present invention, in the belt member forming step, a protruding portion protruding to the other side is formed with respect to one of the belt main body and the cushion body, and the protruding portion is formed with respect to the other. A recess for fitting is formed. And in a pasting process, a belt body and a cushion object are pasted together, and a crevice is made to fit in a projection part. As a result, the cushion body is positioned with respect to the belt main body by the fitting of the protrusion and the concave portion to each other. As a result, the belt main body and the cushion body are bonded to each other with high accuracy, and the holding force of the conveyed product is reduced. Is suppressed.

  According to the present invention, one of the belt main body and the cushion body is formed with a protruding portion that protrudes to the other side, and the other is formed with a concave portion that fits into the protruding portion. The cushion body can be positioned with respect to the belt main body by the mutual fitting. As a result, the cushion body can be prevented from shifting in the belt width direction with respect to the belt main body, so that the belt main body and the cushion body can be bonded with high accuracy, and the holding force of the conveyed product is prevented from being lowered. it can.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiment.

Embodiment 1 of the Invention
1 to 4 show Embodiment 1 of the present invention. FIG. 1 is a cross-sectional view schematically showing the conveyor belts 1 and 2. FIG. 2 is a diagram illustrating a state in which the plant (conveyed object) P is sandwiched between the belts 1 and 2 and pulled out from the ground. FIG. 3 is a plan view schematically showing a state in which the transport apparatus A is viewed from above. FIG. 4 is a diagram illustrating a state in which the conveyor belts 1 and 2 are respectively wound around two sets of pulley groups 11 and 12.

  As shown in FIG. 2, the transport device A is a plant harvester (illustrated) for automatically extracting and harvesting plants (conveyed items) P such as carrots, radishes, beef bowls, and mosses planted on the ground. Owing to the plant P, the stem P1 on the surface of the plant P is sandwiched and pulled by two traveling belts 1 and 2 (hereinafter also simply referred to as belts). P is pulled out and conveyed.

  The belts 1 and 2 are respectively wound around two sets of pulley groups 11 and 12 including a plurality of pulleys 11a, 11b, 11c, 12a, 12b, 12c, and 12d, so that the outer surfaces of the belts facing each other ( The plant P is sandwiched and conveyed by 5b (hereinafter also referred to as a belt outer surface).

  That is, as shown in FIG. 3, the transport device A has left-side transport composed of first to third left-hand transport pulleys (pulleys) 11a, 11b, and 11c each having a substantially vertical axis of the transport device A. A left conveyor belt (left belt in FIG. 3) 1 that is a conveyor belt wound around a pulley group (pulley group) 11 and a substantially vertical shaft disposed on the right side of the left conveyor pulley group 11. Right-hand side transport belt (a transport belt wound around a right-hand side transport pulley group (pulley group) 12 consisting of first to fourth four right-hand side transport pulleys (pulleys) 12a, 12b, 12c, 12d having a center ( 3 on the right side in FIG.

  The belts 1 and 2 run in opposite directions. That is, the left conveyance belt 1 travels clockwise in FIG. 3 (13 in FIG. 3), while the right conveyance belt 2 travels counterclockwise in FIG. 3 (14 in FIG. 3). Both belts 1 and 2 travel at the same speed. 3 indicates the rotation direction of the left conveyance pulleys 11a, 11b, and 11c, and 16 indicates the rotation direction of the right conveyance pulleys 12a, 12b, 12c, and 12d.

  Further, between the first left conveyance pulley 11a and the third left conveyance pulley 11c disposed at the front end (upper end in FIG. 3) and the left end of the conveyance device A in the left conveyance pulley group 11, the belt is outside the belt. A left guide pulley 17 is arranged. Further, a right guide pulley 18 is arranged outside the belt between the first right conveyance pulley 12a and the fourth right conveyance pulley 12d arranged at the front end and the right end of the conveyance device A in the right conveyance pulley group 12. Has been. The left guide pulley 17 and the right guide pulley 18 are configured to guide the belts 1 and 2 in contact with the belt outer surface 5b.

  A direction in which the first left conveyance pulley 11a and the second left conveyance pulley 11b arranged on the right side in the left conveyance pulley group 11 face each other, and a first right arrangement arranged on the left side in the right conveyance pulley group 12 The conveying pulley 12a and the second right conveying pulley 12b are disposed so as to be parallel to each other. Then, a plane passing through the right outer peripheral edge of the first left transport pulley 11a and the second left transport pulley 11b and a left outer peripheral edge of the first right transport pulley 12a and the second right transport pulley 12b are passed. The planes are close to and parallel to each other. The front-rear distance between the first left transport pulley 11a and the second left transport pulley 11b is greater than the front-rear distance between the first right transport pulley 12a and the second right transport pulley 12b. .

  Further, the first left transport pulley 11a and the first right transport pulley 12a are arranged corresponding to the left and right of the transport device A. The pair of conveying belts 1 and 2 are not holding the plant P, and the first left conveying pulley 11a and the second left conveying pulley 11b, and the first right conveying pulley 12a and the first conveying pulley 12a. The two right-hand conveying pulleys 12b are parallel to each other and are in contact with each other on the belt outer surface 5b and run in parallel in the same direction and at the same speed. And when both the belts 1 and 2 which run in parallel hold the plant P, the belt outer surface 5b is partly in contact with each other through the stem portion P1 without being in contact with each other, and sandwiches the stem portion P1. Then, between the two belts 1 and 2 that run in parallel, the plant P is extracted from the ground by pulling the stem portion P1 from the position between the first left conveyance pulley 11a and the first right conveyance pulley 12a. It is like that.

  The transport pulleys 11a, 11b, 11c, 12a, 12b, 12c, and 12d have the same structure except that the pulley diameters are different from each other. As shown in FIG. In the center in the vertical direction), a guide groove 19 having a substantially V-shaped cross section having a predetermined depth is formed continuously over the entire circumference of the pulley. Further, at both ends in the pulley width direction, a pair of belt detachment prevention and meandering prevention flanges 20 having a predetermined height are provided so as to partially protrude (may be the entire circumference) on the pulley outer periphery. The guide pulleys 17 and 18 have the same structure as the transport pulleys 11a, 11b, 11c, 12a, 12b, 12c, and 12d, and a pair of flanges 20 having a predetermined height project from both ends of the outer peripheral surface in the pulley width direction. ing. The distance between the flanges 20 facing each other at both ends in the belt width direction of the conveying pulleys 11 and 12 is the same as the distance between the flanges 20 facing each other at both ends in the belt width direction of each guide pulley 17, 18. Is set to

  The left conveying belt 1 and the right conveying belt 2 have the same structure except that the lengths of the belts are different from each other. As shown in FIG. 11a, 11b, 11c, 12a, 12b, 12c, and 12d are provided with a belt main body 3 and a cushion body 5 bonded to the outer surface of the belt main body 3, respectively.

  The belt body 3 is made of, for example, CR rubber (chloroprene rubber), and the width thereof is the dimension between the flanges 20 of the respective transport pulleys 11a, 11b, 11c, 12a, 12b, 12c, 12d, and the guide pulleys 17, 18 It is the same as the dimension between the flanges 20. A plurality of layers (for example, two to three layers) of a suede layer 7 made of nylon, PET (polyethylene terephthalate), or the like is formed inside the belt body 3. Further, at the center of the belt inner surface of the belt body 3 in the belt width direction, a protrusion having a substantially V-shaped cross section made of NR rubber (natural rubber) extending in the belt length direction over the entire circumference in the belt length direction. The strips 4 are integrally formed, and the belts 1 and 2 are connected to the respective guide pulleys 19 on the outer periphery of the transport pulleys 11a, 11b, 11c, 12a, 12b, 12c, and 12d. It travels around the transport pulley groups 11 and 12.

  On the other hand, the cushion body 5 is formed of a foamed sponge having a substantially rectangular cross section having bubbles (single bubbles or continuous bubbles), and the corners of the outer surface thereof are formed in an arc shape. The cushion body 5 is a sponge hardness meter conforming to SRISO0101, for example, having a hardness of 13 ° to 30 °, and the belt of the cushion body 5 of both belts 1 and 2 when the plant P is not being transported. The outer surface 5b is in contact with each other without any gap, and when the plant P is transported, a part of the belt outer surface 5b of the cushion body 5 of both belts 1 and 2 faces each other through the stem portion P1 and does not damage the stem portion P1 of the plant P. Hold like so.

  Both side surfaces 5a of the belt body 3 in the belt width direction and both side surfaces 3a of the cushion body 5 in the belt width direction are configured by planes parallel to the belt thickness direction, that is, planes orthogonal to the inner and outer surfaces of the belt. Has been. The belt width of the cushion body 5 is smaller than the belt width of the belt body 3 (L2 <L1) while the belts 1 and 2 do not hold the plant (conveyed object) P. As a result, both side surfaces 5 a of the cushion body 5 in the belt width direction are arranged on the center side in the belt width direction of the belt body 3 from both side surfaces 3 a of the belt body 3 in the belt width direction. A distance t in the belt width direction between both side surfaces 5a of the cushion body 5 and both side surfaces 3a of the belt body 3 is, for example, 0.5 mm to 5.0 mm.

  Further, the cushion body 5 has a step formed in the belt width direction over the entire belt circumference on the outer surface 5b of the belt, and the cushion of the opposite belt 1 or 2 that contacts when both belts 1 and 2 run side by side. It is formed in a step shape so as to alternate with the surface of the body 5 (that is, the belt outer surface 5b of the cushion body 5 of the counterpart belt 1, 2 is also formed in a step shape). As a result, the removal resistance of the plant P held between the two cushion bodies 5 is increased to facilitate the removal of the plant P.

  One of the belt body 3 and the cushion body 5 is formed with a protruding portion 21 that protrudes to the other side, and the other is formed with a concave portion 22 that fits into the protruding portion 21. In the first embodiment, a protrusion 21 is formed on the belt body 3 and a recess 22 is formed on the cushion body 5.

  Three protrusions 21 are formed at predetermined intervals in the belt width direction, and each extends over the entire belt circumference. These protrusions 21 are formed in a rectangular cross section in the belt width direction. That is, three recesses 22 are formed at predetermined intervals in the belt width direction at the position of the cushion body 5 corresponding to the protrusions 21, each extending over the entire belt circumference and having a rectangular cross section in the belt width direction. Is formed. Thus, the protrusion 21 and the recess 22 are fitted to each other, and the belt body 3 and the cushion body 5 are bonded together.

  Thus, each belt 1 and 2 is comprised so that the plant P may be pinched directly and conveyed by the belt outer surface 5b of the cushion body 5 which mutually opposes. Thus, when the plant P is harvested by the plant harvester, the left conveyor belt 1 of the conveyor A travels while being guided by the left conveyor pulley group 11, and the right conveyor belt 2 moves to the right conveyor pulley group 12. The two belts 1 and 2 travel in the same direction and at the same speed when traveling in parallel. Then, as shown in FIG. 2, the stem P <b> 1 of the plant P is sandwiched and conveyed by the cushion bodies 5 facing each other in the two belts 1 and 2 that run side by side, and the plant P faces upward (backward in the upper direction in FIG. 2) It is designed to be pulled out from the ground.

-Manufacturing method-
Next, a method for manufacturing the conveyor belts 1 and 2 will be described. The manufacturing method of the conveying belts 1 and 2 includes a belt member forming step and a bonding step.

  In the belt member forming step, a protruding portion 21 protruding to the other side is formed for one of the belt body 3 and the cushion body 5, and a concave portion 22 for fitting to the protruding portion 21 is formed for the other. . In the first embodiment, the protrusion 21 is formed on the belt body 3 and the recess 22 is formed on the cushion body 5. That is, in the belt member forming step, the protrusion 21 is integrally formed when the belt body 3 is formed by vulcanization formation or compression molding using a mold, and the recess 22 is formed when the cushion body 5 is extruded. Form. Thus, the belt main body 3 having the protruding portion 21 and the cushion body 5 having the concave portion 22 are formed separately.

  In the bonding process performed thereafter, the belt main body 3 and the cushion body 5 are bonded together, and the concave portion 22 is fitted to the protruding portion 21. That is, as shown in FIG. 5, the belt body 3 is hung on, for example, a biaxial pulley, and the cushion body 5 is opposed to the belt body 3 so that the corresponding protrusions 21 and recesses 22 face each other. Then, the protrusion 21 and the recess 22 are fitted together, and the cushion body 5 is attached to the belt body 3. 5 indicates a direction in which the cushion body 5 is attached to the belt body 3. The attachment of the cushion body 5 to the belt body 3 is performed, for example, by interposing an adhesive such as chloroprene between the belt body 3 and the cushion body 5. In this way, the belt main body 3 and the cushion body 5 are separately formed and then bonded to each other to manufacture the conveying belts 1 and 2.

-Effect of Embodiment 1-
Therefore, according to the first embodiment, the belt body 3 is formed with the protruding portion 21 that protrudes toward the cushion body 5, and the cushion body 5 is formed with the recessed portion 22 that fits into the protruding portion 21. Therefore, the cushion body 5 can be positioned with respect to the belt body 3 by the fitting of the protrusion 21 and the recess 22 to each other. As a result, the cushion body 5 can be prevented from shifting in the belt width direction with respect to the belt body 3. As a result, the belt main body 3 and the cushion body 5 can be bonded together with high accuracy, and a decrease in the holding power of the plant (conveyed object) P can be suppressed.

  In addition to this, since the bonding area of the cushion body 5 to the belt body 3 increases, the adhesion between the belt body 3 and the cushion body 5 can be enhanced. As a result, it is possible to prevent the cushion body 5 from peeling off from the belt body 3 when the plant P is nipped and conveyed.

  Furthermore, since the protrusion part 21 is extended over the belt perimeter, the protrusion part 21 and the recessed part 22 can be mutually fitted over a belt perimeter. As a result, it is possible to suppress the displacement of the cushion body 5 in the belt width direction with respect to the belt body 3 in the entire belt circumference. As a result, the belt body 3 and the cushion body 5 can be bonded together with higher accuracy. It can suppress more that pinching force falls.

  Moreover, since the protrusion part 21 is formed in the cross-sectional rectangle shape, the protrusion part 21 can be formed easily. In addition, when the belt body 3 and the cushion body 5 are bonded to each other, the protrusion 21 and the recess 22 are fitted to each other as compared with the case where the protrusion 21 is formed in a triangular cross section or a circular arc shape. Accordingly, the cushion body 5 can be accurately positioned by the belt body. As a result, the cushion body 5 can be further prevented from shifting in the belt width direction with respect to the belt body 3, and the belt body 3 and the cushion body 5 can be bonded more firmly.

  Further, in the belt member forming step, the protruding portion 21 that protrudes toward the cushion body 5 with respect to the belt body 3 is formed, and the recessed portion 22 that fits into the protruding portion 21 is formed with respect to the cushion body 5. When the cushion body 5 is affixed to the belt body 3 in the joint process, the cushion body 5 can be positioned with respect to the belt body 3 by the fitting of the protrusion 21 and the recess 22 to each other. Can be bonded together with high accuracy, and a decrease in the pinching force of the plant P can be suppressed.

<< Other Embodiments >>
In the first embodiment, the protruding portion 21 is formed in a rectangular cross section. However, the present invention is not limited to this, and the protruding portion 21 has both side surfaces perpendicular to the belt width direction as shown in FIG. And the cross section in the belt width direction at the tip of the protruding portion 21 in the protruding direction may be formed in an arc shape. Also with this configuration, the protruding portion 21 can be easily formed, and the cushion body 5 is arranged in the belt width direction with respect to the belt body 3 as compared with the case where the protruding portion 21 is formed in a cross-sectional triangle shape or a cross-sectional arc shape. The shift can be further suppressed, and the belt body 3 and the cushion body 5 can be bonded more firmly.

  Further, as shown in FIG. 7, the protrusion 21 may have a triangular cross section in the belt width direction. That is, the protrusion 21 may be formed to have a tapered side surface in which the distance between the protrusions gradually decreases toward the protrusion. Thus, even when the protruding portion 21 is formed in a triangular cross section, the protruding portion 21 can be easily formed. Further, the belt body 3 and the cushion body 5 can be aligned and easily bonded together.

  Moreover, as shown in FIG. 8, the protrusion part 21 may be formed in the cross section of the belt width direction in circular arc shape. Also with this configuration, the protruding portion 21 can be easily formed, and the belt main body 3 and the cushion body 5 can be aligned and easily bonded together.

  Further, as shown in FIG. 9, the protruding portion 21 is formed in a wedge shape so that the distance between both side surfaces in the belt width direction gradually increases toward the protruding end of the protruding portion 21. May be. According to this configuration, when the belt body 3 and the cushion body 5 are bonded together, the cushion body 5 can be more accurately positioned with respect to the belt body 3 by the mutual fitting of the protrusion 21 and the recess 22. The cushion body 5 can be prevented from shifting in the belt width direction as much as possible with respect to the belt body 3, and the belt body 3 and the cushion body 5 can be bonded more firmly. The shape of the protruding portion 21 is such that the shape of the concave portion 22 formed in the cushion body 5 by the protruding portion 21 is crushed, and the belt main body 3 and the cushion body 5 are in a state where the protruding portion 21 and the concave portion 22 are not fitted. Is preferably applied when the conveying belts 1 and 2 are formed by the relatively hard cushion body 5 having a hardness of about 50 °.

  In addition, as shown in FIG. 10, the protruding portion 21 may be formed in a wedge shape, with the protruding portion 21 protruding in the protruding direction on both sides in the belt width direction. Also with this configuration, the cushion body 5 can be more accurately positioned with respect to the belt body 3 by the fitting of the protrusion 21 and the recess 22 to each other, so that the cushion body 5 is displaced in the belt width direction with respect to the belt body 3. Can be suppressed as much as possible, and the belt body 3 and the cushion body 5 can be bonded more firmly. The shape of the protruding portion 21 is also preferably applied when the conveying belts 1 and 2 are formed by the relatively hard cushion body 5 having a hardness of about 50 °.

  In the first embodiment, the protruding portion 21 extends over the entire circumference of the belt. However, the present invention is not limited to this, and the protruding portion 21 may be formed intermittently over the entire circumference of the belt. The protrusion 21 and the recess 22 need only be fitted so that the cushion body 5 is positioned at least partially in the belt width direction with respect to the belt body 3.

  In the first embodiment, three protrusions 21 are formed. However, the present invention is not limited to this, and more than three protrusions 21 may be formed. It may be formed less. That is, an arbitrary number of protrusions 21 can be formed.

  In the first embodiment, the plant (conveyed object) P is directly held by the belt outer surface 5b of the cushion body 5, but the present invention is not limited to this, and the conveying belts 1 and 2 are as shown in FIG. In addition, the skin layer 25 may be provided on the belt outer surface 5 b of the cushion body 5. The skin layer 25 is made of, for example, a soft rubber sheet such as neoprene that is integrally joined to cover the belt outer surface 5b of the cushion body 5, and the hardness of the rubber sheet is, for example, 20 ° to 90 ° in JIS-A. It is. If it does in this way, wear resistance of belt outer surface 5b of cushion body 5 can be improved, and wear can be controlled.

  In the first embodiment, the belt outer surface 5b of the cushion body 5 is formed in a step shape. However, the present invention is not limited to this, and the belt outer surface 5b of the cushion body 5 is formed as shown in FIG. It may be curved and formed into a wave shape. Also with this configuration, it is possible to improve the pulling resistance of the plant P held between the belt outer surfaces 5b of both cushion bodies 5. Furthermore, as shown in FIG. 13, by providing the skin layer 25 covering the belt outer surface 5b of the cushion body 5, the abrasion resistance of the belt outer surface 5b of the cushion body 5 that is easily worn due to increased resistance to pulling out the plant P. Can be improved. In addition, the entire belt outer surface 5b of the cushion body 5 may be formed flat.

  In the first embodiment, the protrusion 21 is formed on the belt body 3 and the recess 22 is formed on the cushion body 5. However, the present invention is not limited to this, and the protrusion 21 is formed on the cushion body 5. While being formed, the belt body 3 may be formed with a recess 22, and in this case as well, the same effect as in the first embodiment can be obtained. That is, one of the belt body 3 and the cushion body 5 may be formed with the protruding portion 21 protruding to the other, and the other may be formed with the recessed portion 22 fitted to the protruding portion 21.

  In the first embodiment, the cushion body 5 is attached to the belt body 3 in the bonding step. However, the present invention is not limited to this, and the belt body 3 is attached to the cushion body 5 to convey the belt. 1 and 2 may be manufactured.

  In the first embodiment, in the belt member forming step, the protruding portion 21 is integrally formed when the belt main body 3 is formed. However, the present invention is not limited to this, and the belt main body portion excluding the protruding portion 21 is formed by vulcanization formation or the like. After that, the protruding portion 21 may be formed on the belt main body portion.

  As described above, the present invention is useful for the conveying belt and the manufacturing method thereof, and particularly when the belt main body and the cushion body are bonded with high accuracy to suppress the decrease in the holding force of the conveyed object. Suitable for

FIG. 3 is a cross-sectional view schematically illustrating a conveyance belt according to the first embodiment. It is sectional drawing which shows the state which pinches | extracts it from the ground, pinching vegetables on the belt for conveyance. It is a top view which shows the conveying apparatus in a plant harvester. It is sectional drawing which shows the state by which the belt for conveyance was wound around the conveyance pulley. It is sectional drawing which shows the state which affixes a cushion body with respect to a belt main body. It is sectional drawing which has a both-sides surface perpendicular | vertical to a belt width direction, and shows the protrusion part where a front-end | tip part is circular arc-shaped. It is sectional drawing which shows the protrusion part of a cross-sectional triangle shape roughly. It is sectional drawing which shows roughly a cross-sectional arc-shaped protrusion part. It is sectional drawing which shows roughly the protrusion part from which the space | interval of the both sides | surfaces of a belt width direction spreads gradually toward a front-end | tip part. It is sectional drawing which shows roughly the protrusion part which the front-end | tip part protrudes in the both sides of a belt width direction. It is sectional drawing which shows schematically the belt for conveyance which has an outer skin layer which covers the outer surface of a cushion body. It is sectional drawing which shows roughly the belt for conveyance in which the outer surface of the cushion body was formed in the wave shape. FIG. 13 is a cross-sectional view schematically illustrating a transport belt having a skin layer that covers an outer surface of a cushion body in the transport belt of FIG. 12. It is sectional drawing which shows the conventional conveyance belt roughly. It is sectional drawing which shows roughly a pair of conventional conveyance belts which run in parallel.

Explanation of symbols

P plant (conveyance)
1 Left conveyor belt (conveyor belt)
2 Right conveyor belt (conveyor belt)
3 Belt body 5 Cushion body 5b Belt outer surface 11 Left-hand conveyance pulley group (pulley group)
11a First left transport pulley (pulley)
11b Second left-hand conveyance pulley (pulley)
11c Third left-hand conveyance pulley (pulley)
12 Right transport pulley group (pulley group)
12a First right-hand conveyance pulley (pulley)
12b Second right-hand conveyance pulley (pulley)
12c Third right-hand conveyance pulley (pulley)
12d Fourth right transport pulley (pulley)
21 Projection 22 Recess

Claims (10)

A belt body extending to the endless and having a belt inner surface in contact with the pulley, and a cushion body bonded to the belt outer surface of the belt body;
A conveyor belt configured to be conveyed by sandwiching a conveyed object by cushion bodies facing each other by being wound around two sets of pulley groups each including a plurality of pulleys,
One of the belt main body and the cushion body is formed with a protruding portion that protrudes to the other side, and the other is formed with a concave portion that fits into the protruding portion. In claim 1,
The conveyor belt, wherein the protrusion is formed on the belt body and the recess is formed on the cushion body. In claim 1,
The above-mentioned protrusion part is extended over the belt perimeter, The belt for conveyance characterized by the above-mentioned. In claim 1,
The conveyor belt according to claim 1, wherein the protrusion has a rectangular cross section in the belt width direction. In claim 1,
The conveyor belt according to claim 1, wherein the projecting portion has both side surfaces perpendicular to the belt width direction, and a cross section in the belt width direction at a distal end portion in the projecting direction of the projecting portion is formed in an arc shape. In claim 1,
The conveyor belt according to claim 1, wherein the protrusion has a triangular cross section in the belt width direction. In claim 1,
The above-mentioned protrusion part is a belt for conveyance characterized by the section of a belt width direction being formed in circular arc shape. In claim 1,
The above-mentioned protrusion part is formed so that the mutual interval of the both sides of a belt width direction may be formed so that it may spread gradually toward the protrusion direction tip of this protrusion part. In claim 1,
The conveying belt, wherein the protruding portion is formed such that a protruding end portion of the protruding portion protrudes on both sides in the belt width direction. A belt main body extending to the endless and having a belt inner surface in contact with the pulley, and a cushion body bonded to the belt outer surface of the belt main body. Is a method for manufacturing a transport belt configured to sandwich and transport a transported object by cushion bodies facing each other,
A belt member forming step of forming a protruding portion protruding to the other side with respect to one of the belt body and the cushion body and forming a recess for fitting to the protruding portion with respect to the other,
The manufacturing method of the belt for conveyance characterized by including the bonding process which bonds the said belt main body and the said cushion body together, and fits the said recessed part to the said protrusion part.

Images