JP2009040526A - Conveying belt manufacturing method, and conveying belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveying belt having a rib of excellent strength for supporting an object to be conveyed and usable for a long period, and its manufacturing method. <P>SOLUTION: The conveying belt 10 includes a rib 12 and a canvas 18. The canvas 18 covers a surface 12S of the rib 12 and only peripheral parts of first and second boundaries 16, 17. The rib 12 has a shape having the height 12H larger than the maximum thickness 12T. The conveying belt 10 with its surface 12S of the rib 12 only being covered by the canvas 18 is manufactured by forming the rib 12 with its surface 12S being covered by the canvas 18 by using a die, and affixing the rib 12 to a belt body 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a conveyor belt and a conveyor belt, and more particularly to a method for manufacturing a conveyor belt provided with ribs.

2. Description of the Related Art Transmission belts, conveyance belts, and the like are known in which protrusions (ribs) are provided on the belt surface (see, for example, Patent Documents 1 and 2). The protrusions are provided on the back side of the conveyor belt so that an object to be transported, such as a pachinko ball, does not fall when being transported to a high place (see, for example, Patent Document 1).
JP 2007-83453 A JP-A-7-2329

  In some cases, the rib of the conveyor belt may crack due to the gravity of the object to be conveyed applied to the rib. In particular, in a conveyor belt that is wound around a pulley and conveys an object upward, a crack tends to occur from the bottom of the rib to the vicinity of the center. When the cracks generated in the ribs are enlarged, it is necessary to replace the conveyor belt in order to prevent the object to be conveyed from falling. For this reason, the life of the transport belt is shortened and smooth transport work is hindered.

  Accordingly, an object of the present invention is to realize a transport belt that is excellent in strength of a rib that supports an object to be transported and can be used for a long period of time, and a method for manufacturing the transport belt.

  The method for manufacturing a conveyor belt according to the present invention is a method for manufacturing a conveyor belt in which the surface of a rib is covered with a canvas. And a rib forming step of pressing the rib material against the canvas placed in the concave portion of the mold to form the rib, and an attaching step of attaching the bottom surface of the rib not covered by the canvas to the back surface of the endless belt body. It is characterized by that.

  In the manufacturing method of a conveyance belt, it is preferable to further have a 1st recessed part formation process which provides a 1st recessed part in the bottom face of a rib. And it is more preferable to perform a rib formation process and a 1st recessed part formation process simultaneously. Moreover, it is preferable to further have a 2nd recessed part formation process which provides the 2nd recessed part corresponding to the curvature of the pulley used with a conveyance belt in the other side of the bottom face of the rib in the pulley surface of a belt main body. In this case, it is more preferable to perform the attaching step and the second recess forming step at the same time.

  In the method for manufacturing the conveyor belt, it is preferable to simultaneously perform the rib forming step and the pasting step.

  The conveyance belt of the present invention includes a canvas, an endless belt main body, and a rib provided on the back surface of the belt main body, and the surface of the rib is covered with the canvas. And it is preferable that the recessed part corresponding to the curvature of the pulley used with a conveyance belt is provided in the rib area | region on the other side of the bottom face of a rib in the pulley surface of a belt main body.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in the intensity | strength of the rib which supports the target object of conveyance, and the conveyance belt which can be used over a long period of time, and its manufacturing method are realizable.

  Hereinafter, an embodiment of a conveyor belt in the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a state in which the conveyance belt of the present embodiment is used. FIG. 2 is a perspective view showing the conveyor belt.

  The conveyor belt 10 is wound around, for example, a driving pulley 42 (pulley) and a driven pulley 44 (pulley) of the pachinko ball conveyor 40 and used to convey the pachinko balls 46. The conveyor belt 10 includes a rib 12 and a belt main body 14. The rib 12 is provided on the back surface 14 </ b> R of the endless belt body 14.

  The belt body 14 is mainly formed of rubber such as chloroprene rubber. The pulley surface 14P of the belt main body 14, that is, the surface opposite to the back surface 14R is covered with a nylon reinforcing cloth 15. In the belt main body 14, as will be described later, a core wire (not shown) as a tensile body is embedded along the longitudinal direction.

  When the driving pulley 42 provided above the pachinko ball conveying device 40 rotates as indicated by the arrow A, the conveying belt 10 travels in the direction indicated by the arrow B. Then, as indicated by an arrow C, the pachinko ball 46 moved toward the first boundary 16 of the joint between the rib 12 on the driven pulley 44 and the belt body 14 is directed upward while being supported by the rib 12. Go ahead. As indicated by an arrow D, the pachinko ball 46 that has moved up onto the drive pulley 42 is supplied to, for example, a ball polishing device (not shown).

  FIG. 3 is an enlarged perspective view showing the rib 12 of the conveyor belt 10.

  The surface 12S of the rib 12 is covered with the canvas 18 so that the strength of the rib 12 is improved. For this reason, it is a boundary line of the joint portion between the rib 12 and the belt main body 14, and is generally an area where cracks are likely to occur, such as near the root of the rib 12 including the second boundary line 17 on the opposite side of the first boundary line 16. Also, the occurrence of cracks is prevented.

  As is clear from FIG. 1, it is the surface 12 </ b> S of the rib 12 and the first and second boundary lines 16 and 17 that are loaded by the object to be transported such as the pachinko ball 46. For this reason, in the present embodiment, the canvas 18 substantially covers only the surface 12S of the rib 12, that is, only the periphery of the rib surface 12S and the first and second boundary lines 16 and 17, and the back surface of the belt body. The area away from the rib 12 in 14 </ b> R is not covered by the canvas 18. However, not only the surface 12S of the rib 12 but also the entire belt main body back surface 14R may be covered with the canvas 18.

  The rib 12 has a thin and high shape as compared with a rib of a general conveyance belt. For example, the height 12H of the rib 12 shown in FIG. 3 is about 2 cm, and the maximum thickness 12T is about 2 to 3 mm. Thus, the ratio of the height 12H of the rib 12 to the maximum thickness 12T is approximately 5 to 10, and the conveyance belt 10 having the thin and high-shaped rib 12 is manufactured as follows. The rib 12 has a tapered shape with a thickness that is thicker toward the root side, that is, the first and second boundary lines 16 and 17, so that the maximum thickness 12T is equal to the first and second boundary lines 16 and 17. Is the distance between.

  Next, a method for manufacturing the conveyor belt 10 will be described. FIG. 4 is a cross-sectional view showing a rib forming process for forming the rib 12. FIG. 5 is a side view showing a sticking process for sticking the rib 12 to the belt body 14. FIG. 6 is a side view showing a recess provided on the pulley surface of the belt main body 14.

  The mold 20 is used in a step (rib forming step) for forming the rib 12 (see FIGS. 1 to 3). For this reason, the mold 20 is provided with a plurality of recesses 20C having a shape corresponding to the shape of the rib 12 to be manufactured. First, the canvas 18 (see FIG. 3) is inserted into the recessed portion 20C in a folded state. Further, the rib material 24, which is a sheet-like material for forming the rib 12, is appropriately heated and pressed against the gap of the canvas 18 as indicated by the arrow E.

  Thus, the rib 12 is formed by pressing the rib material 24 toward the canvas 18 placed on the recess 20C and vulcanizing the deformed material while deforming the rib material 24. When the vulcanization of the rib material 24 is completed, the canvas 18 on the mold 20 is cut at the end of the rib 12. The canvas 18 is made of nylon, for example, and the rib material 24 is made of, for example, chloroprene rubber.

  At the time of vulcanization of the rib material 24 in this rib forming step, a moderately heated metallic pressing member (not shown) is pressed against the central portion of the rib bottom surface 12B. At this time, a first recess 12C (not shown in FIGS. 1 to 3) is provided (first recess forming step). That is, the vulcanization of the rib material 24 as a part of the rib forming process and the first recess forming process are performed simultaneously.

  An adhesive (not shown) is applied to the bottom surface 12B (see FIG. 5) of the rib 12 thus manufactured which is not covered with the canvas 18 and is pressed against the back surface 14R of the belt body 14 as indicated by an arrow F. And paste (paste process). The belt body 14 is manufactured in advance prior to the pasting step, and a glass fiber core wire 21 is embedded in a rubber layer 19 of chloroprene rubber, and a pulley surface 14P is covered with a reinforcing cloth 15.

  Simultaneously with the step of attaching the rib 12, as shown in FIG. 6, a second recess 14C (not shown in FIGS. 1 to 3) is formed on the pulley surface 14P of the belt body 14 (second recess formation step). That is, when the bottom surface 12B (see FIG. 5) of the rib 12 is affixed to the belt main body back surface 14R, the belt main body pulley surface 14P side is also pressed by a pressing member (not shown), and as a result, the second recess 14C is formed. It is formed. 14C of 2nd recessed parts are provided in the position corresponding to the rib bottom face 12B in the pulley surface 14P, ie, the area | region on the opposite side to the rib bottom face 12B.

  As will be described later, the second recess 14C is provided for smooth engagement of the transport belt 10 with respect to the driving and driven pulleys 42 and 44 (see FIG. 1). Then, by providing the first recess 12C on the rib bottom surface 12B, the belt main body 14 is prevented from being distorted when the second recess 14C is provided.

  Further, by forming the first recess 12C, a slight recess (not shown) is formed on the pulley surface 14P side of the belt body 14 prior to the second recess forming step. For this reason, by forming the first recess 12C directly above the position where the second recess 14C should be formed, the pulley surface 14P side where the ribs 12 affixed to the belt body 14 cannot be directly seen. Therefore, the position where the second recess 14C should be formed can be easily determined, and the work of the second recess forming step is facilitated.

  FIG. 7 is a side view showing a state in which the conveyor belt 10 of the present embodiment is engaged with the drive pulley 42. FIG. 8 is a side view showing a state in which the conveyance belt of the comparative example is engaged with the drive pulley 42.

  The second recess 14C is provided to ensure that the pulley surface 14P is in contact with the driving and driven pulleys 42 and 44 when the conveying belt 10 is engaged with the driving and driven pulleys 42 and 44 (see FIG. 1). Yes. For this reason, the second concave portion 14C corresponds to the curvatures of the driving and driven pulleys 42 and 44, and is substantially a recess having the same curvature as these curvatures. However, the shape of the second recess 14 </ b> C is adjusted as appropriate according to the rigidity of the belt body 14.

  As described above, by providing the second recess 14C on the pulley surface 14P, the peripheral area of the rib 12 in the belt body 14 is thicker than the other areas, but the conveyor belt 10 is driven and driven pulley. Also when engaged with 42, 44, the entire region of the pulley surface 14P is reliably driven and contacts the driven pulleys 42, 44 as shown in FIG.

  On the other hand, in the conveyance belt 30 of the comparative example in which the second concave portion 14C is not provided (see FIG. 8), the peripheral portion of the rib 32 in the belt main body 34 is less likely to bend than the other regions. A gap S is formed between the reinforcing cloth 15 that forms the belt and the driving or driven pulleys 42 and 44, and there is a concern that stable traveling may be hindered.

  FIG. 9 is a cross-sectional view showing a sticking step and a rib forming step performed simultaneously.

  As described above, the rib material 24 is heated and cured in the rib forming step (see FIG. 4), and the rib 12 is heated and pressed against the belt main body 14 in the attaching step (see FIG. 5). In this way, the sticking process and the rib forming process, both of which apply heat, can be performed simultaneously.

  In this case, the belt main body 14 is pressed onto the upper part of the rubber material 24 having an appropriate viscosity poured into the mold 20 so as to push the canvas 18 as indicated by an arrow G. In this state, the rubber material 24 is vulcanized. Thus, when performing a sticking process and a rib formation process simultaneously, the conveyance belt 10 can be manufactured more efficiently. Note that the interval between the recesses 20 </ b> C of the mold 20 is the same as the interval between the ribs 12 in the manufactured conveyor belt 10.

  As described above, according to this embodiment, it is possible to improve the strength of the rib 12 by selectively covering the surface 12S of the rib 12 with the canvas 18 and to realize the transport belt 10 that can be used for a long period of time. Furthermore, it is possible to manufacture the conveyor belt 10 having such ribs 12 by an efficient manufacturing method.

  Although it is conceivable that the rib 12 and the belt main body 14 are integrally formed by pouring a material into the mold, such a manufacturing method has a height 12H (see FIG. 3) with respect to the maximum thickness 12T. It is difficult to manufacture the conveyance belt 10 of the present embodiment having the rib 12 that is large and substantially has only the surface 12S covered with the canvas 18. This is because when a mold for integrally molding the rib and the belt main body is used, the rib material can be poured into the depression for forming the tip of the elongated rib, or the canvas can be provided only on the rib surface. This is because it is difficult.

  The material, shape, and the like of each member constituting the conveyance belt 10 such as the rib 12, the belt main body 14, and the canvas 18 are not limited to those of the present embodiment. For example, as the material of the rib 12 and the belt body 14, (H-) NBR, NR, EPDM, CSM, urethane rubber, etc. can be used in addition to chloroprene rubber (CR). Further, the reinforcing cloth 15 and the canvas 18 are not limited to nylon but may be polyester, aramid, cotton, or the like.

It is a figure which shows the state in which the conveyance belt of this embodiment is used. It is a perspective view which shows a conveyance belt. It is a perspective view which expands and shows the rib of a conveyance belt. It is sectional drawing which shows the rib formation process which forms a rib. It is a side view which shows the sticking process which affixes a rib on a belt main body. It is a side view which shows the recessed part provided in the pulley surface of the belt main body. It is a side view which shows the state which the conveyance belt of this embodiment engages with a drive pulley. It is a side view which shows the state which the conveyance belt of a comparative example engages with a drive pulley. It is sectional drawing which shows the sticking process and rib formation process which are performed simultaneously.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Conveying belt 12 Rib 12B Bottom surface 12C 1st recessed part 12S Surface 14 Belt main body 14C 2nd recessed part 14P Pulley surface 14R Back surface 18 Canvas 20 Mold 20C Recessed part 24 Rib material 42 Drive pulley (pulley)
44 Driven pulley (pulley)

Claims (8)

A method of manufacturing a conveyor belt in which the surface of a rib is covered with canvas,
A rib forming step of pressing the rib material against the canvas placed in the recess of the mold to form the rib;
And a sticking step of sticking a bottom surface of the rib not covered with the canvas to a back surface of the endless belt body.   The method for manufacturing a conveyor belt according to claim 1, further comprising a first recess forming step of providing a first recess on a bottom surface of the rib.   The method for manufacturing a transport belt according to claim 2, wherein the rib forming step and the first concave portion forming step are performed simultaneously.   2. A second recess forming step of providing a second recess corresponding to a curvature of a pulley used together with the conveyor belt on a side opposite to a bottom surface of the rib on a pulley surface of the belt main body. Item 4. A method for producing a conveyor belt according to any one of Items 1 to 3.   The method for manufacturing a conveyor belt according to claim 4, wherein the attaching step and the second recess forming step are performed simultaneously.   The method for manufacturing a conveyor belt according to any one of claims 1 to 5, wherein the rib forming step and the sticking step are performed simultaneously. Canvas,
An endless belt body,
A rib provided on the back of the belt body,
A transport belt, wherein a surface of the rib is covered with the canvas.   8. The concave portion corresponding to the curvature of the pulley used together with the conveyor belt is provided in a rib region on the opposite side of the bottom surface of the rib on the pulley surface of the belt main body. Conveyor belt.

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