JP2010105796A - Conveyor belt for inclined conveyance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveyor belt for inclined conveyance, exhibiting sufficient conveying ability even when a conveyance line has an inclination for making articles go up and down and reducing the occurrence of noise even when a layout in which a conveyance face comes in contact with a pulley is used. <P>SOLUTION: Wave-shaped irregularities 4 formed in a diagonal direction with respect to a belt running direction on a conveyance face 3 are provided over the whole circumference of the conveyance face 3, a vertical groove in the belt running direction is provided in the conveyance face 3, and the irregularities 4 are divided in the belt width direction. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a conveyor belt used for conveying articles on the back side of the belt, and in particular, an inclined conveyor belt having a high conveyance capability that can be used where an inclined conveyance path is provided. The present invention relates to a conveyor belt for inclined conveyance that generates little noise even when the pulley layout is such that the pulley is in contact with the pulley.

  2. Description of the Related Art Conventionally, a conveyor belt having various patterns formed on a conveyance surface has been proposed as a conveyor belt for applications such as an inclined conveyance line for raising and lowering a load. Some belts have protrusions such as a shelf on which the articles are placed on the conveyance surface, and other belts are simply conveyed by grip force with the articles. A conveyor belt of the type that conveys by gripping force requires a high gripping force between the belt and the object to be transported, especially in the up line, leading to a functional failure that makes it impossible to carry articles if the gripping force is insufficient. End up. The grip force on the surface is affected by the environment in which the belt is used, and may change over time due to adhesion of dust or dust.

  There are those in which the conveyance surface is flat and the gripping force is exhibited by the friction coefficient of the material, and others are provided with a gripping force by forming a pattern on the conveyance surface. Patterns on the belt conveyance surface include vertical grooves in the running direction of the belt, shapes formed by transferring the texture when forming the conveyance surface, and patterns provided with many diamond-shaped (square pyramid) patterns, etc. There is.

  Further, as a material constituting the conveying surface, thermoplastic elastomers such as soft rubber, polyurethane and soft polyvinyl chloride, which have a low hardness (40 to 70 ° JIS A) are generally used.

  Further, Patent Document 1 discloses a conveyor belt used for inclined conveyance, in which a number of patents are provided on the conveyance surface.

JP 2003-31822 A

  Problems with such a conveyor belt include a problem that the grip force is insufficient and hinders the conveyance of articles and that the noise is large. As a noise generation source, in the case of the layout as shown in FIG. 3 where the conveyance surface is in contact with the pulley, if the belt is provided with a pattern on the conveyance surface, pitch noise or the like due to the pattern is likely to occur. Pitch noise is likely to occur due to intermittent contact between the belt and the pulley.

  In the case of a belt that has a flat conveyance surface and gives grip force depending on the material, even if it is run in a layout where the conveyance surface is in contact with the pulley, there is almost no noise generation, but since there is no pattern on the surface, the material In addition to the fact that the conveyance is carried out relying solely on the frictional force, the gripping force is not originally large, and there is a problem that the gripping force decreases with time.

  In the case of a belt with a longitudinal groove in the belt running direction on the conveying surface, there is an effect that dust and dust etc. are dropped into the longitudinal groove so as not to intervene between the belt and the article. The improvement is not so great, and the grip force is reduced by the adhesion of dirt on the conveying surface.

  In the case of a belt with a diamond-shaped pattern on the conveying surface, the article is physically hooked and conveyed by the unevenness of the surface, so the conveying ability is high even if it is inclined, and the conveying ability declines over time Can be said to be a small belt, but pitch noise is inevitably large due to large pattern irregularities and intermittent contact when the transport surface contacts the pulley. There is a problem of becoming.

  Therefore, in the present invention, even if the conveying line has an inclination to raise or lower the article, it can exhibit a sufficient conveying ability and is used in a layout in which the conveying surface comes into contact with the pulley. Even in such a case, an object of the present invention is to provide a conveyor belt for inclined conveyance with less noise generation.

  In order to achieve the above object, in claim 1 of the present invention, the back surface of the belt is a transport surface for transporting articles, and in a conveyor belt used in an inclined road, the transport surface is directed to the belt running direction. In addition, the present invention has a wave-shaped unevenness formed in a slanting direction, further provided with a longitudinal groove in the belt running direction on the conveying surface, and the unevenness is divided in the belt width direction by the longitudinal groove. To do.

  According to a second aspect of the present invention, the conveyor belt for inclined conveyance according to the first aspect, wherein the unevenness is always present somewhere in the belt width direction at an arbitrary position in the belt traveling direction.

  According to a third aspect of the present invention, the pitch of the corrugated irregularities in the belt running direction is in the range of 4 to 8 mm. The inclined conveyor belt according to any one of the first and second aspects.

  In Claim 4, it is set as the conveyor belt for inclined conveyance in any one of Claims 1-3 whose curvature radius R of the convex part front-end | tip in a waveform unevenness | corrugation is the range of 1-2 mm.

  In Claim 5, it is set as the conveyor belt for inclined conveyance in any one of Claims 1-4 whose angle with respect to the belt running direction of an unevenness | corrugation is the range of 15-75 degrees.

  According to a sixth aspect of the present invention, the inclined conveying conveyor belt according to any one of the first to fifth aspects is configured such that the direction of inclination of the uneven surface with respect to the belt running direction is set in the opposite direction across the longitudinal groove.

  In claim 1, since the corrugated irregularities are provided on the transport surface, a transport mode in which the article is physically hooked and transported is adopted, and the transport capability can be maintained at a high level over a long period of time. In addition, the contact between the belt and the conveyed product is a line contact at the tip of the convex portion, so even if dust or dirt such as dust adheres to the conveyance surface, the grip force between the belt and the article may be greatly affected. Absent. In addition, since the unevenness of the conveying surface has an oblique angle with respect to the traveling direction, dust accumulated on the conveying surface as the belt travels can be discharged to the side of the belt, The vertical grooves that divide the concavities and convexities are provided, so that the contact between the conveyed product and the belt is not a line but a surface, and dust and the like on the belt surface are easily discharged.

  According to the second aspect of the present invention, since the unevenness provided on the belt conveyance surface is always provided somewhere in the belt width direction at an arbitrary position in the belt traveling direction, even when the conveyance surface travels in contact with the pulley, the pulley Is always in contact with the convex and concave portions of the bumps, and the pitch noise generated by intermittent contact between the pulley and the concave and convex pattern on the belt conveyance surface can be reduced, and the running noise of the belt can be reduced. Can be greatly reduced.

  In claim 3, since the pitch of the corrugated uneven pattern in the belt running direction is in the range of 4 to 8 mm, the carrying capacity of the conveyed product is high and the noise during the belt running is also small. be able to.

  According to the fourth aspect of the present invention, the radius of curvature R at the tip of the convex portion in the wave-shaped concave / convex pattern is in the range of 1 to 2 mm, and the frictional force with the conveyed product can be increased.

  According to claim 5, the angle of the uneven pattern with respect to the belt running direction is in the range of 15 to 75 °, and when dust or dirt accumulates on the conveying surface, it is easy to discharge to the side surface of the belt, and the conveying surface is a pulley. Since the pulley and the convex portion can always be in contact with each other when they are in contact with each other, it is possible to reduce the occurrence of pitch noise that occurs when the conveying surface and the pulley are in intermittent contact.

  According to the sixth aspect of the present invention, since the inclination of the unevenness with respect to the belt traveling direction is opposite to the vertical groove, the belt meandering can be prevented.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a side view of an inclined conveying belt according to the present invention, FIG. 2 is an enlarged plan view of a main part of the inclined conveying belt according to the present invention, and FIG. 3 uses the inclined conveying belt according to the present invention. It is a schematic diagram which shows the layout which a conveyance surface contacts with a pulley.

  The inclined conveying belt 1 of the present invention is composed of a belt body 2 and irregularities 4 formed on the conveying surface 3 which is the back surface thereof, and the irregularities 4 improve the ability to convey a conveyed product.

  The irregularities 4 are as shown in FIG. 2, and the corrugated irregularities 4 formed on the conveying surface 3 in an oblique direction with respect to the belt running direction are provided over the entire circumference of the conveying surface 3. 3 is provided with a longitudinal groove 5 in the belt running direction. The vertical grooves divide the irregularities 4 into a plurality in the belt width direction.

  Although the unevenness 4 is inclined with respect to the belt running direction, even if dust or dust accumulates on the carrying surface, it can be discharged in the belt side direction as the belt runs, It is possible to keep the conveyance capacity of the conveyed product high without reducing the friction coefficient of the surface.

  When the unevenness 4 provided on the conveying surface is a pattern in the width direction of the belt, the driving pulley 100 and idler pulleys 101 and 102 and guide pulleys 103 and 104 as shown in FIG. And the guide pulleys 103 and 104 are used in a layout where they contact each other, the conveyance surface 3 and the guide pulleys 103 and 104 are in contact with each other only at the tip of the convex portion in the case of a conveyance surface having an uneven pattern on the surface. Contact, and pitch noise is generated as the belt travels. However, in the inclined conveyor belt 1 of the present invention, the unevenness 4 provided on the conveying surface 3 is inclined with respect to the belt running direction, and the convex portion 4a and the guide pulley 103 are always provided somewhere in the belt width direction. , 104 can be brought into contact with each other, the pitch noise as described above can be greatly reduced, and the noise during running of the belt 1 can be made as low as possible. Therefore, it is preferable to set the inclination angle θ of the unevenness with respect to the belt running direction within an angle range of 15 to 75 °. If the inclination angle θ deviates from this, it is difficult to discharge dust and dust to the side surface of the belt.

  In addition, a plurality of longitudinal grooves 5 are provided along the belt conveying direction, and the corrugated irregularities 4 are divided by the longitudinal grooves 5 in the middle of the belt width direction and become discontinuous in the belt width direction. Yes. By doing so, the dust, dust, etc. collected in the recess 4b of the unevenness 4 are easily discharged from the recess to the vertical groove. Further, the unevenness 4 is divided by the vertical grooves 5, so that the contact between the conveyed product and the belt conveying surface 3 can be prevented from approaching the contact on the surface, and when dust or the like accumulates on the conveying surface 3. It is possible to prevent the transport capability from being significantly reduced.

  As described above, the unevenness 4 is formed with an inclination in an oblique direction with respect to the belt traveling direction, and is divided into a plurality by the bell and the longitudinal groove 5 in the traveling direction. The direction of the inclination with respect to is preferably opposite to the opposite direction on both sides of the vertical groove 5. For example, if the direction of inclination of the unevenness 4 is the same throughout the belt, there is a tendency for the belt to meander during traveling, and the occurrence of meandering can be prevented by reversing the direction of inclination. Furthermore, the effect of preventing meandering can be further enhanced by shifting the pitch of the irregularities 4.

  The belt main body 2 of the inclined conveyor belt 1 of the present invention has a structure as shown in FIG. 2, for example, and woven fabric made of polyester fiber, aramid fiber, polyamide fiber, etc. is used as the core canvas 2a, 2b. In addition, a base material in which a core canvas suitable for the application is laminated with an adhesive 22 in a predetermined number of plies is used. In addition, the upper surface of the upper cover layer 23 made of polyurethane, polyvinyl chloride, olefin-based thermoplastic elastomer or the like excellent in durability can be used.

  As the irregularities 4 formed on the belt body 2, the same resin or rubber as the resin used as the cover layer of the belt body 2 such as polyurethane, polyvinyl chloride, and olefin-based thermoplastic elastomer can be used.

(Example)
As an embodiment, there is a conveyor belt for inclined conveyance having a surface pattern composed of corrugated irregularities included in the present invention as shown in FIG. 1, the entire width of the belt is 1200 mm, and the inclination angle of the irregularities with respect to the belt running direction. Was 45 °, the radius of curvature R at the tip of the convex portion was 1.75 mm, the height of the convex portion was 1.5 mm, and the pitch between the convex and concave portions was 5 mm. A plurality of grooves having a width of 2 mm were formed as the longitudinal grooves in the belt running direction, and the distance between the longitudinal grooves was 8 mm. The pitch of the unevenness on both sides across the vertical groove is shifted by 2 mm.

(Comparative Example 1)
As Comparative Example 1, the shape of the unevenness 14 formed on the conveying surface 13 is not a wave shape, but the same as the inclined conveying conveyor belt 11 except that a trapezoidal unevenness 14 as shown in FIG. 4 is formed. The trapezoidal irregularities are such that the top surface of the convex portion has a width of 2 mm. The configuration of the belt body 12 is the same as that in the embodiment.

(Comparative Example 2)
As Comparative Example 2, the same conveyor belt for inclined conveyance as that in Example was used except that the conveyance surface as shown in FIG. 5 was formed of polyurethane resin and only vertical grooves were formed without providing irregularities. The configuration of the belt body 12 is the same as that in the embodiment.

(Comparative Example 3)
As Comparative Example 3, as shown in FIG. 6, the conveying surface is not provided with corrugated irregularities and vertical grooves, and the same inclined conveying belt as that of the example except that a large number of diamond-shaped eyes are provided. . The configuration of the belt body 12 is the same as that in the embodiment.

(Comparative Example 4)
As Comparative Example 4, as shown in FIG. 7, the conveyance surface is not provided with corrugated irregularities and vertical grooves, but the same inclined conveyance belt as that of the example is provided except that lattice-like grooves are provided. The configuration of the belt body 12 is the same as that in the embodiment.

(Comparative Example 5)
As Comparative Example 5, as shown in FIG. 8, the conveyance surface is not provided with corrugated irregularities and vertical grooves, and the same inclined conveyance belt as that of the example is provided except that a pattern having a texture transferred is provided. The configuration of the belt body 12 is the same as that in the embodiment.

The following inclined conveyance test was performed using the inclined conveyance belts of the above Examples and Comparative Examples 1 to 4. As shown in FIG. 9, a cardboard box D adjusted so as to have a load of 10 g / cm ² is placed on the conveyor belt, the inclination angle V of the conveyor device is increased, and the cardboard is ejected at a belt speed of 20 m / min. The maximum inclination angle θ that can be conveyed without sliding down was measured.

  The test was conducted at two levels: when the belt conveying surface was used in its original state, and when it was used in a state in which dust consisting of talc was intentionally attached assuming dust.

  Further, in order to measure the noise generated when the belt conveying surface comes into contact with the pulley, a noise measurement test as described below was performed. The conveyor belt for inclined conveyance was mounted so that the conveyance surface having a pattern on the surface in the four-axis layout as shown in FIG. The belt width was 100 mm, the pulley diameter at this time was 50 mm, the tension was 4.0 N / mm, and the speed was 120 m / min. The noise was measured by installing a sound level meter S at a position 100 mm from the end of the belt at the center of the four axes, and measuring the total noise on the A scale. The background noise at this time was 63 to 64 dB, and the motor sound measured without wearing a belt was 69 to 70 dB. The test results are shown in Table 1.

  In the waveform of the example, the maximum inclination angle in the original state was the largest. Moreover, when comparing the implementation rate with the comparative example 1 in which the convex portion is trapezoidal and the tip is a surface and is in surface contact with the embodiment rate, there is a difference in the maximum inclination angle in the state where talc is adhered. It can be seen that the shape of the example is advantageous to dust and dust adhesion.

  The conveyor belt for inclined conveyance of the present invention can be applied to an application in which a conveyed product is conveyed up and down on an inclined road.

It is a partial side view of the conveyor belt for inclined conveyance which concerns on this invention. It is a partial top view of the conveyor belt for inclination conveyance concerning the present invention. It is a schematic diagram which shows the layout which a conveyance surface contacts a pulley. 6 is a partial side view of a conveyor belt according to Comparative Example 1. FIG. It is a partial side view of the conveyor belt which concerns on the comparative example 2. It is a partial side view of the conveyor belt which concerns on the comparative example 3. It is a partial side view of the conveyor belt which concerns on the comparative example 4. 10 is a partial side view of a conveyor belt according to Comparative Example 5. FIG. It is a schematic diagram which shows the layout of an inclination conveyance test. It is a schematic diagram which shows the layout of a noise measurement test.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyor belt for inclined conveyance 2 Belt main body 3 Conveying surface 4 Concavity and convexity 5 Vertical groove 11 Conveyor belt for inclined conveying 12 Belt main body 13 Conveying surface

Claims (6)

  The belt rear surface is a conveying surface for conveying articles, and in a conveyor belt used on an inclined path, the conveying surface has corrugated irregularities formed in an oblique direction with respect to the belt traveling direction, and further the conveying surface A conveyor belt for inclined conveyance, wherein a vertical groove is provided in the belt running direction, and the concave and convex portions are divided in the belt width direction by the vertical groove.   The conveyor belt for inclined conveyance according to claim 1, wherein the unevenness is always present somewhere in the belt width direction at an arbitrary position in the belt traveling direction.   The inclined conveyor belt according to any one of claims 1 to 2, wherein the pitch of the corrugated irregularities in the belt running direction is in the range of 4 to 8 mm.   The inclined conveyor belt according to any one of claims 1 to 3, wherein a radius of curvature R of the tip of the convex portion in the corrugated irregularities is in a range of 1 to 2 mm.   The inclined conveyor belt according to any one of claims 1 to 4, wherein an angle of the unevenness with respect to the belt running direction is in a range of 15 to 75 °.   The inclined conveyor belt according to any one of claims 1 to 5, wherein the inclination direction of the unevenness with respect to the belt running direction is set in the opposite direction across the vertical groove.

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