JP2022143522A - Bead guide and curve belt conveyor - Google Patents

Abstract

To provide a bead guide and a curve belt conveyor which can reduce more than before generation of abrasion powder and sliding resistance during conveyor operation.SOLUTION: A bead guide 30 positions a conveying belt and suppresses the movement of the conveying belt to the inner circumference through contact of at least a part of a rod-shaped part 32 on bead of the conveying belt in a curve belt conveyor, and is configured with a support part 31 fixed to a pedestal and a rod-shaped part 32 which is made of resin, supported by the support part 31, extends from the support part 31 in a direction along the outer peripheral edge and is provided at least partially in contact with the beads.SELECTED DRAWING: Figure 2

Description

The present invention relates to bead guides and curved belt conveyors.

With belt conveyors, a curved belt conveyor is often interposed between the conveyors in order to transfer to the front and back conveyors in different conveying directions. In this case, when the objects to be conveyed are food products such as small grains of chocolate, or small electronic parts, small-diameter end rollers are often used at both ends of the curved belt conveyor for smooth delivery. That is, these end rollers are arranged so that their axes intersect at a predetermined angle, and an endless conveying belt is stretched between the end rollers to form a plane fan-shaped conveying surface.

For this reason, conventionally, a method has been employed in which a conveyor belt and a driving body for driving the conveyor belt are separated and connected between them by a connection fitting or the like, thereby using a small-diameter end roller. Allows for small items to be transported.

Patent Document 1 discloses a conveyor main body, a beaded conveyor belt stretched on the conveyor main body, a movement prevention member that prevents the beaded conveyor belt from moving inward, and a drive unit that rotates the beaded conveyor belt. , a motor with a speed reducer in the driving part, a cover covering the inner and outer peripheral parts of the conveyor belt with a movement blocking member on the upper surface side and a bead, and a leg for arranging the main body of the conveyor at an appropriate height. It is

Further, Patent Document 2 discloses two end rollers whose axes intersect at a predetermined angle, an endless conveying belt that is stretched between the end rollers and has a plane fan shape, and two end rollers. A drive roller and a tail roller which are provided on the outer side in the axial direction and whose axes are in the same direction as those of the two end rollers, and a drive roller and a tail roller which are stretched between the drive roller and the tail roller and extend radially outward with respect to the conveying belt. An endless driving flat belt positioned apart from a conveying belt and a plurality of elastic bodies connecting the flat belt and the conveying belt are provided. A curved belt conveyor is disclosed with beads attached continuously along the perimeter.

In curved belt conveyors, the conveyor belt moves inward during conveyor operation. In order to prevent this, it is known to provide a bead made of resin near the end of the conveyor belt on the outer peripheral side, and to provide a bead guide that contacts the bead to prevent the conveyor belt from moving inward. there is As a member of the bead guide that abuts against the bead, a metal rod-like member with both ends rounded and coated with a fluorocarbon resin is used.

JP-A-2002-338022 JP 2009-234766 A

The bead and the bead guide provided on the outer circumference of the conveyor belt are configured to be in constant contact with each other. When the bead and the bead guide are in constant contact with each other in this manner, there is a risk that the bead and the bead guide will rub against each other during the conveyor operation, generating abrasion powder. In addition, if the bead and the bead guide are in constant contact with each other, the friction between the bead and the bead guide increases sliding resistance during conveyor operation. It gets bigger.

For this reason, it has been considered to apply grease to the bead to reduce the generation of abrasion powder and sliding resistance due to friction between the bead and the bead guide. , there is a problem that the cost is generated by the amount of grease used. Therefore, it is desired to reduce the generation of abrasion powder and the sliding resistance at the contact point between the bead and the bead guide without using grease.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bead guide and a curved belt conveyor that can reduce the generation of abrasion powder and sliding resistance during conveyor operation.

The bead guide of the present invention is provided on a frame, and includes two end rollers whose axes intersect at a predetermined angle, and a fan-shaped plane extending between the two end rollers to position the belt at the outer peripheral edge. In a curved belt conveyor having an endless conveying belt to which a bead is attached, at least a part contacts the bead to position the conveying belt and suppress the movement of the conveying belt A bead guide, which is made of a support fixed to the pedestal and a resin, is supported by the support, and extends from the support in a direction along the outer peripheral edge, and a rod-like portion, at least a portion of which is provided so as to contact the bead.

The curved belt conveyor of the present invention is provided on a frame, and has two end rollers whose axes intersect at a predetermined angle. An endless conveying belt to which a positioning bead is attached, and a bead guide, wherein the bead guide is formed of resin and a support portion fixed to the base, and a rod-shaped portion supported by a support portion, extending from the support portion in a direction along the outer peripheral edge portion, and provided so that at least a portion thereof contacts the bead; Contact with the bead positions the conveying belt and suppresses the movement of the conveying belt.

According to the bead guide and curved belt conveyor of the present invention, it is possible to reduce the generation of abrasion powder and sliding resistance during conveyor operation more than before.

1 is a perspective view of a curved belt conveyor according to an embodiment of the invention; FIG. 1 is a perspective view of a bead guide according to an embodiment of the invention; FIG. FIG. 3 is a perspective view of the bead guide of FIG. 2 from a direction different from that of FIG. 2; FIG. 2 is a sectional view across the vicinity of a bead guide of the curved belt conveyor of FIG. 1; FIG. 2 is a side view of a bead guide of the curved belt conveyor of FIG. 1; FIG. 2 is a plan view of a bead guide of the curved belt conveyor of FIG. 1; 4 is a graph showing dynamic friction coefficients according to Examples. It is a graph which shows the cumulative wear amount which concerns on an Example. It is a graph which shows the time change of the wear amount which concerns on an Example. 5 is a graph showing changes over time in current values according to the example. FIG. 11 is a perspective view of a bead guide according to another embodiment; FIG. 11 is a perspective view of a support portion of a bead guide according to another embodiment; FIG. 11 is a perspective view of a rod-shaped portion of a bead guide according to another embodiment; FIG. 11 is a perspective view of a height adjusting portion of a bead guide according to another embodiment;

Embodiments of the present invention will be described below. However, the embodiments described below are only examples, and can be modified as appropriate within the scope obvious to those skilled in the art.

<Embodiment>
(Structure of curved belt conveyor and bead guide)
FIG. 1 is a perspective view of a curved belt conveyor 1 according to this embodiment. As shown in FIG. 1, the curved belt conveyor 1 according to this embodiment includes a base 10, two end rollers 11, 11, a conveyor belt 12, and a bead guide 30. As shown in FIG. The curved belt conveyor 1 is installed between an upstream conveyor and a downstream conveyor (not shown), conveys an article from the upstream conveyor onto a conveying belt 12, and conveys the article to the downstream conveyor. and pass smoothly.

The pedestal 10 is a stand on which members constituting the curved belt conveyor 1 such as the two end rollers 11, 11, the conveying belt 12, and the bead guide 30 are attached.

The two end rollers 11, 11 are arranged so that their longitudinal axes intersect at a predetermined angle, and are mounted on the frame 10 while being rotatably held by bearings (not shown). The two end rollers 11, 11 are small diameter rollers each having a diameter in the range of 6 to 20 mm, for example. The end rollers 11, 11 are, for example, of a divided type composed of a plurality of rollers divided in the circumferential direction. A peripheral speed difference, which is a difference in peripheral speed, is absorbed, and the peripheral speed difference can be mitigated. Although the angle at which the axes of the end rollers 11, 11 intersect is not particularly limited, the angle at which the axes of the end rollers 11, 11 intersect is about 90° in the curved belt conveyor 1 shown in FIG.

The conveying belt 12 is an endless belt, and is stretched between two end rollers 11 and 11 while being properly tensioned by a tension adjusting unit (not shown). It is arranged so as to be supported by a fixed conveyor base 14 (FIG. 4), which will be described later, and has a planar fan shape. The transport belt 12 is provided with a drive unit such as a drive roller to which a motor is connected. The drive unit allows the transport belt 12 to move in the circumferential direction of the plane sector shape. The conveying belt 12 has a bead 12b (FIG. 4) attached to the surface of the conveying belt 12 along its outer peripheral edge, as will be described later.

At least a portion of the bead guide 30 contacts the bead 12b to position the conveying belt 12 and suppress the movement of the conveying belt 12 toward the inner periphery.

FIG. 2 is a perspective view of the bead guide 30 according to this embodiment, showing the bead guide 30 shown in FIG. 1 in detail. FIG. 3 is a perspective view of the bead guide 30 of FIG. 2 from a direction different from that of FIG. The bead guide 30 of this embodiment includes a support portion 31 , a rod portion 32 and a height adjustment portion 33 .

Further, in the bead guide 30 of this embodiment, the support portion 31 is made of the same resin as the rod-shaped portion 32, and the support portion 31 and the rod-shaped portion 32 are integrally formed. Furthermore, the height adjusting portion 33 is also made of the same resin as the supporting portion 31 and the rod-shaped portion 32 and is formed integrally with the supporting portion 31 and the rod-shaped portion 32 .

2 and 3 indicates the height direction of the bead guide 30. As shown in FIG. X indicates the width direction of the support portion 31 of the bead guide 30 . Y is a direction orthogonal to the height direction Z and the width direction X, and is the radial direction of the conveying belt 12 when the bead guide 30 is installed on the conveyor base 14 .

The support portion 31 is fixed to the conveyor base 14 . The support portion 31 has a fixing portion 31a fixed to the conveyor base 14 on one end side, and a frame portion 31c integrally formed with the fixing portion 31a on the other end side. The frame portion 31c is provided with a pair of side plate portions 31e and 31f whose ends are formed integrally with the fixed portion 31a and opposed to each other, and a tip plate portion 31g that connects the tips of the side plate portions 31e and 31f. there is

In the frame portion 31c, the side plate portions 31e and 31f and the tip plate portion 31g are arranged in a U shape in a plan view, and the region surrounded by the fixing portion 31a, the side plate portions 31e and 31f, and the tip plate portion 31g has a thickness. is provided with an opening 31b passing through.

A fixing portion 31 a of the support portion 31 fixed to the conveyor base 14 may be provided with a concave portion or the like for fixing to the conveyor base 14 . The supporting portion 31 extends from a fixing portion 31a fixed to the conveyor base 14 to a frame portion 31c extending from the outer peripheral edge portion of the conveying belt 12 to the inner peripheral side. The frame portion 31c is configured to extend.

Here, since the entire supporting portion 31 according to the present embodiment is integrally molded with resin and is provided with the opening portion 31b, for example, an external force applied to the rod-shaped portion 32 causes the rod-shaped portion 32 to move. When it is applied to the frame portion 31c through the feed belt 12, the shapes of the frame portion 31c and the opening portion 31b can be appropriately deformed, and the rod-like portion 32 can be brought into uniform contact with the bead 12b of the conveying belt 12. As shown in FIG.

The height adjusting portion 33 is made of the same resin as the supporting portion 31 and the bar-shaped portion 32 and formed into a plate shape, and is formed integrally with the tip plate portion 31g of the supporting portion 31 and the bar-shaped portion 32 . The height adjusting portion 33 is provided for supporting the outer cover. As shown in FIG. 2, the height adjusting portion 33 according to the present embodiment has a planar wall surface 33a including the height direction Z and the width direction X, and from the wall surface 33a to the peripheral surface of the bar-shaped portion 32 is formed flat through the connecting portion 33b. The connecting portion 33b is provided between the wall surface 33a and the peripheral surface of the rod-shaped portion 32, and eliminates a step between the wall surface 33a and the peripheral surface of the rod-shaped portion 32 to separate the wall surface 33a and the peripheral surface of the rod-shaped portion 32. flattening.

The bar-shaped portion 32 is formed in a round bar shape, is integrally formed with the support portion 30 , and is supported by the support portion 31 . The bar-shaped portion 32 extends from the side (frame portion 31c) of the support portion 31 farther from the fixed portion 31a fixed to the conveyor base 14 along the outer peripheral portion of the conveyor belt 12 in one direction of the outer peripheral portion. and a second rod-shaped portion 32b formed to extend in the other direction opposite to the one direction along the outer peripheral edge of the conveying belt 12. and

FIG. 4 is a sectional view across the vicinity of the bead guide 30 of the curved belt conveyor 1 of FIG. A conveyor belt 12 is supported on a conveyor base 14 . The conveying belt 12 includes a belt body 12a and beads 12b. The belt main body 12a is formed by processing a sheet made of canvas such as polyester as a core and a conveying surface made of thermoplastic polyurethane or the like into an endless belt. The bead 12b has a plate-like portion 21a and a wall-like thick portion 21b. The bead 12b is made of a synthetic resin material such as polyamide resin. The bead 12b is attached by sewing along the outer peripheral edge of the conveying belt 12 or the like.

5 is a side view of the bead guide 30 of the curved belt conveyor 1 of FIG. 1. FIG. FIG. 5 is a side view of the bead guide 30 attached to the conveying belt 12 provided parallel to the XY plane as seen from the Y direction. The direction perpendicular to the upper surface of the conveying belt 12 is the Z direction. In FIG. 5, the position (height) in the Z direction of the root portion 32aA supported by the support portion 31 of the first rod-shaped portion 32a is H1 with respect to the position (height) in the Z direction of the upper surface of the conveyor belt 12. , and the position (height) in the Z direction of the tip portion 32aB of the first rod-shaped portion 32a is indicated by H2. Based on the height of the transport belt 12, the first bar-shaped part 32a is arranged such that the height of the tip part 32aB is higher than the height of the root part 32aA, and the height of the transport belt 12 increases from the base part 32aA toward the tip part 32aB. gradually tilts away from That is, it is preferable that the first bar-shaped portion is inclined so that the distance from the conveying belt 12 to the tip portion 32aB is greater than the distance from the conveying belt 12 to the root portion 32aA. Thereby, the stability of the circumferential movement of the transport belt 12 can be enhanced. Although FIG. 5 shows the first rod-shaped portion 32a, the same applies to the second rod-shaped portion 32b.

6 is a plan view of the bead guide 30 of the curved belt conveyor 1 of FIG. 1. FIG. FIG. 6 is a plan view of the bead guide 30 attached to the conveying belt 12 provided parallel to the XY plane as viewed from the Z direction. The bar-shaped portion 32 is, for example, curved along the outer peripheral edge of the conveying belt 12 (curved with a curvature along the outer peripheral edge). As shown in FIG. 6, the curvature 32R of the rod-shaped portion 32 is larger than the curvature 12R of the outer peripheral edge of the conveying belt 12. It is preferably smaller than the radius of curvature of the peripheral portion. Thereby, the stability of the circumferential movement of the transport belt 12 can be enhanced.

The bar-shaped portion 32 is provided so that at least a portion of the rod-shaped portion 32 is in contact with the inner peripheral side surface of the bead 12b. The bar-shaped portion 32 has, for example, a shape of a round bar in which only a short range of the end portion is tapered, and is formed in an arc shape with a radius of curvature that abuts on the inclined surface on the inner peripheral side of the thick portion 21b. .

In the bead guide 30 of this embodiment, the support portion 31, the height adjusting portion 33 and the rod-shaped portion 32 (first rod-shaped portion 32a, second rod-shaped portion 32b) are made of resin. The resin constituting the support portion 31, the height adjustment portion 33 and the rod-shaped portion 32 includes fluorine-containing polyacetal (polyoxymethylene: POM), silicon-containing POM, polyphenylene sulfide, polyamide made of hexamethylenediamine and adipic acid, and the like. Polyamide or the like can be used, and fluorine-containing POM is particularly preferably used from the viewpoint of abrasion resistance.

Since the bead guide 30 can be manufactured by, for example, injection molding, there is no need to assemble the parts. .

(Action and effect)
In the bead guide 30 of the present embodiment, the rod-shaped portion 32 contacting the bead 12b is made of resin. Since the rod-shaped portion 32 can move more flexibly than the conventional one according to the applied external force, the load applied from the bead 12b can be reduced in the rod-shaped portion 32, and abrasion powder is generated at the contact point with the bead 12b. sliding resistance can be reduced.

In addition, since the rod-shaped portion 32 made of resin of the bead guide 30 is flexibly movable in response to the external force applied from the bead 12b, the rod-shaped portion 32 can be brought into uniform contact with the bead 12b. Inward movement can be reliably prevented.

By the way, as a conventional bead guide, a rod-shaped base body made of a metal such as stainless steel is coated with Teflon (registered trademark) on the surface of the rod-shaped base body, and a resin layer is formed on the surface of the rod-shaped base body. Bead guides having portions have been considered. In this conventional bead guide, the resin layer of the rod-shaped portion coated with grease is brought into contact with the bead 12b and slid, thereby suppressing the inward movement of the conveying belt 12 during operation of the conveyor. Further, in the conventional bead guide, a rod-shaped portion, a metal plate height adjustment portion, and a resin support portion are separately configured. work was required to assemble the

On the other hand, in the bead guide 30 according to the present embodiment, since the entire inside of the rod-shaped portion 32 is made of resin, it is more flexible than the conventional rod-shaped portion provided with a metal rod-shaped base body inside. The rod-like portion 32 moves in response to the external force applied from the bead 12b during conveyor operation, thereby reducing the load applied from the bead 12b. As a result, the bead guide 30 according to the present embodiment can further reduce the generation of abrasion powder and the sliding resistance at the contact portion with the bead 12b as compared with the conventional one.

With such a bead guide 30, it is possible to reduce the generation of abrasion powder and the sliding resistance at the contact portion of the rod-shaped portion 32 with the bead 12b without using the conventionally used grease. Since grease is not used, grease application work can be reduced and costs can be reduced.

Further, in the bead guide 30, the load on the motor for driving the conveying belt 12 can be reduced by the amount of the sliding resistance when the bar-shaped portion 32 slides on the bead 12b during the conveyor operation. Power consumption can be reduced.

In addition, in the bead guide 30 according to the present embodiment, the frame portion 31c made of resin can be deformed according to the external force applied from the bead 12b via the rod-like portion 32, thereby Since the applied load can be further reduced, it is possible to correspondingly reduce the generation of abrasion powder and the sliding resistance at the contact portion with the bead 12b.

Furthermore, in the bead guide 30 according to the present embodiment, the support portion 31, the rod-shaped portion 32, and the height adjustment portion 33 are integrally molded with resin, thereby eliminating the conventional assembly work. It is possible to reduce the burden on the worker during installation. In the bead guide 30, the support portion 31, the rod-shaped portion 32, and the height adjustment portion 33 are integrally molded with resin, so that the number of parts can be reduced, and the cost can be reduced accordingly. can be planned.

<Example>
(dynamic friction coefficient)
Next, the dynamic friction coefficient of the resin used for the bead guide 30 was measured. Here, test plate materials corresponding to the rod-shaped portion 32 of the bead guide 30 were manufactured by changing the type of resin, etc., and the dynamic friction coefficient of each test plate material was measured.

As Example 1, a test plate material (50 mm long, 50 mm wide, 50 mm thick) made of polyphenylene sulfide resin (PPS: Poly Phenylene Sulfide Resin) (manufactured by DIC Corporation, product name: FZL-4033) was prepared. , As Example 2, a test plate material (50 mm long, 50 mm wide, 50 mm thick) made of fluorine-containing POM (polyacetal) (manufactured by Mitsubishi Engineering-Plastics Co., Ltd., product name FL2020) was prepared. As 3, a test plate material (50 mm long, 50 mm wide, 50 mm thick) made of POM containing silicon (manufactured by Mitsubishi Engineering-Plastics Corporation, product name: FL2022) was prepared.

Further, as Comparative Example 1, a rod-shaped portion of a conventional bead guide was prepared by coating a rod-shaped stainless steel rod-shaped portion substrate having a diameter φ of 8 mm with polytetrafluoroethylene.

These Examples 1 to 3 and Comparative Example 1 were slid on nylon (manufactured by Toray Industries, Inc., product name CM3003G1000) at a sliding speed of 5 mm/s and a load of 4.9 N using a Haydon surface property measuring instrument. Each dynamic friction coefficient at that time was measured.

FIG. 7 is a graph showing the measurement results of the dynamic friction coefficient obtained as a result. As shown in FIG. 7, the dynamic friction coefficient of Example 1 was 0.15, the dynamic friction coefficient of Example 2 was 0.10, and the dynamic friction coefficient of Example 3 was 0.10. On the other hand, the dynamic friction coefficient of Comparative Example 1 was 0.16. The dynamic friction coefficients of Examples 1 to 3 were smaller than that of Comparative Example 1, and in particular, Examples 2 and 3 were the smallest.

(Total amount of wear)
Next, using a pico abrasion tester, each cumulative wear amount was measured when the cutting edge of the tester was applied to Examples 1 to 3 and rotated. Here, a load of 44 N is applied and the number of rotations is 60 rpm, and the blades of the testing machine are applied to Examples 1 to 3 to rotate 20 rotations in the forward and reverse directions alternately, for a total of 80 rotations. A total amount of wear was measured when 3 sets of tests were conducted.

FIG. 8 is a graph showing the measurement results of the cumulative wear amount obtained as a result. As shown in FIG. 8, the cumulative wear amount of Example 1 is 18.8 mg, the cumulative wear amount of Example 2 is 8.8 mg, and the cumulative wear amount of Example 3 is 18.1 mg. there were. Among Examples 1 to 3, the cumulative wear amount of Example 2 was the smallest.

(Time change of wear amount)
Next, a bead guide (Example 4) was prepared in which a rod-like portion, a support portion, and a height adjusting portion were integrally molded with the same fluorine-containing POM as in Example 2 above. In addition, a conventional bead guide (comparative Example 2) was prepared. Then, the bead guides of Example 4 and Comparative Example 2 were set in a curved belt conveyor for testing, and changes over time in the wear amount of the sliding portions of the beads and the bead guides during long-term operation were measured.

Four EC-I 90-20-50 (no load) were prepared as test machines, three of which were fitted with the bead guide of Example 4, and one of which was fitted with the bead guide of Comparative Example 2. The operating speed was 30 m/min, the slip torque set value was 6.0 to 7.0 kg·cm (rated value 5.5 to 7.0 kg·cm), and the current value was rated 0.45 A or less.

FIG. 9 is a graph showing the change in wear amount over time, which is the measurement result. In FIG. 9, the vertical axis indicates the amount of wear (gf), and the horizontal axis indicates the operating time (h). The results of Example 4 are shown by straight lines ac. The results of Comparative Example 2 are indicated by straight line x. In Example 4, as indicated by straight line a, the amount of wear was almost 0 during operation from 0 to 2,000 hours, and as indicated by straight line b, the amount of wear was 0.7 gf during operation from 2,000 to 4,000 hours, which is indicated by straight line c. As shown, the wear amount was 1.0 gf after 2000 to 6000 hours of operation. On the other hand, in Comparative Example 2, as indicated by the straight line x, the wear amount was 1.8 gf during operation from 0 to 6000 hours. It was confirmed that the wear amount of Example 4 was smaller than that of Comparative Example 2.

(Time change of current value)
Next, with respect to the bead guides of Example 4 and Comparative Example 2 described above, the time change of the current value was also measured at the same time as the measurement of the time change of the wear amount, and the results shown in FIG. 10 were obtained. rice field.

FIG. 10 is a graph showing measurement results of changes in current value over time, where the vertical axis indicates the current value (A) and the horizontal axis indicates the operating time (h). The results of Example 4 are shown in graphs ac. The results of Comparative Example 2 are shown by graph x. In Example 4, the current values in all of graphs a to c were smaller than graph x in Comparative Example 2.

<Other embodiments>
In the above-described embodiment, as shown in FIGS. 2 and 3, the bead guide 30 is formed flat without a step between the peripheral surface of the rod-shaped portion 32 and the wall surface 33a of the height adjusting portion 33. is applied, the present invention is not limited to this. As a bead guide according to another embodiment, for example, as shown in FIG. good too.

The bead guide 30X has a configuration in which a support portion 31X, a rod-like portion 32X, and a height adjustment portion 33X are integrally molded with resin. Note that this support portion 31X also has a fixed portion 31Xa fixed to the conveyor base 14 and a frame portion 31Xc integrally formed with the fixed portion 31Xa, as in the above-described embodiment. The frame portion 31Xc is provided with a pair of side plate portions 31Xe and 31Xf whose ends are integrally formed with the fixed portion 31Xa and opposed to each other, and a tip plate portion 31Xg that connects the tips of the side plate portions 31Xe and 31Xf. there is

In the frame portion 31Xc, the side plate portions X31e and 31Xf and the tip plate portion 31Xg are arranged in a U shape in plan view, and the region surrounded by the fixing portion 31Xa, the side plate portions 31Xe and 31Xf, and the tip plate portion 31Xg has a thickness An opening 31Xb penetrating through is provided.

The rod-shaped portion 32X is formed integrally with the support portion 31X configured as described above, and is supported by the support portion 31X. The rod-shaped portion 32X has a first rod-shaped portion 32Xa extending in one direction along the outer peripheral edge of the conveyor belt 12 from one side plate portion 31Xf of the frame portion 31Xc, and the other side plate portion of the frame portion 31Xc. From 31Xe, it also has a second rod-shaped portion 32Xb extending along the outer peripheral edge of the conveying belt 12 in the other direction opposite to the one direction.

In the above-described embodiment, the rod-shaped portion 32 extends from the end of the support portion 31 in one direction and the other direction along the outer peripheral edge of the conveyor belt 12. In the bead guide 30X concerned, a rod-shaped portion 32X is formed at a predetermined distance from a height adjustment portion 33X integrally formed with the tip plate portion 31Xg of the support portion 31X. A step is provided between the wall surface 33Xa of the .

In the bead guide 30X having the above-described configuration, similarly to the bead guide 30 according to the above-described embodiment, the rod-shaped portion 32X in contact with the bead 12b is made of resin, so that abrasion powder during conveyor operation is reduced. and the sliding resistance can be reduced more than before.

<Bead guide with separate bar>
In the above-described embodiment, the case where the bead guide 30 in which the support portion 31, the rod-like portion 32, and the height adjustment portion 33 are integrally molded with resin is applied as the bead guide, but the present invention is limited to this. First, as long as the rod-shaped portion is a bead guide made of resin, bead guides having various shapes and configurations may be applied.

If the rod-shaped portion is a bead guide made of resin, for example, as shown in FIGS. may be

As a bead guide, the support portion 31Y, the rod-shaped portion 32Y, and the height adjustment portion 33Y may all be made of resin. may be made of resin.

The support portion 31Y, the rod-shaped portion 32Y, and the height adjustment portion 33Y may be made of the same resin, or may be made of different resins. The support portion 31Y and the height adjustment portion 33Y do not have to be made of resin.

The support portion 31Y has a fixed portion 31Ya fixed to the conveyor base 14 and a frame portion 31Yc integrally formed with the fixed portion 31Ya. The frame portion 31Yc is provided with a pair of side plate portions 31Ye and 31Yf that are integrally formed with the fixed portion 31Ya and oppositely arranged at the ends thereof, and a tip plate portion 31Yg that connects the tips of the side plate portions 31Ye and 31Yf. there is

In the frame portion 31Yc, the side plate portions Y31e and 31Yf and the tip plate portion 31Yg are arranged in a U shape in a plan view, and the region surrounded by the fixing portion 31Ya, the side plate portions 31Ye and 31Yf, and the tip plate portion 31Yg has a thickness. An opening 31Yb penetrating through is provided.

In this case, the rod-shaped portion 32Y is attached to the attachment portion 31Yd of the support portion 31Y configured as described above. In this embodiment, the support portion 31Y, the rod-shaped portion 32Y, and the height adjustment portion 33Y may be fixed to each other using screws or the like, or may be fixed using an adhesive or the like.

As described above, like the bead guide according to another embodiment, at least the rod-shaped portions 32X and 32Y in contact with the bead 12b are made of resin. When sliding in contact, similar to the above embodiment, the rod-shaped portions 32X and 32Y can move more flexibly than before according to the external force applied from the bead 12b. can be reduced at the rod-shaped portions 32X and 32Y, and the generation of abrasion powder and the sliding resistance at the contact points with the beads 12b can be reduced accordingly.

In the above-described embodiment, the case where the support portions 31, 31X, and 31Y provided with the frame portions 31c, 31Xc, and 31Yc forming the openings 31b, 31Xb, and 31Yb are applied as the support portions has been described. The invention is not limited to this, and for example, a supporting portion in which the insides of the openings 31b, 31Xb, and 31Yb are formed solid without providing the openings 31b, 31Xb, and 31Yb may be applied.

Further, in the present embodiment described above, the rod-shaped portion 32 in which the first rod-shaped portion 32a and the second rod-shaped portion 32b are formed symmetrically with respect to the support portion 31 was described, but the present invention is not limited to this. For example, a rod-shaped portion in which one first rod-shaped portion 32a is shorter than the other second rod-shaped portion 32b, a rod-shaped portion in which the curvature of the first rod-shaped portion and the curvature of the second rod-shaped portion are different, etc. The rod-shaped portion may be such that the first rod-shaped portion and the second rod-shaped portion are formed asymmetrically with respect to 31 . Incidentally, in the bead guide 30X shown in FIG. 11, similarly, the first rod-shaped portion 32Xa and the second rod-shaped portion 32Xb may be formed asymmetrically with respect to the support portion 31X. Similarly, the bead guide formed by assembling the support portion 31Y shown in FIG. 12, the rod-shaped portion 32Y shown in FIG. 13, and the height adjustment portion 33Y shown in FIG. The two rod-shaped portions 32Yb may be formed asymmetrically with respect to the support portion 31Y.

In addition, in the above-described embodiment, for example, the case where the bead guide 30 provided with the height adjustment portion 33 is applied has been described, but the present invention is not limited to this, and the support is provided without providing the height adjustment portion 33. A bead guide consisting of the portion 31 and the rod-shaped portion 32 may be applied. In this case, it is desirable that the bar-shaped portion 32 is integrally formed with the tip plate portion 31g of the support portion 31. As shown in FIG.

1 Curved Belt Conveyor 10 Frame 11 End Roller 12 Conveying Belt 12a Belt Body 12b Bead 14 Conveyor Base 21a Plate-like Part 21b Thick Part 30 Bead Guide 31 Supporting Part 31a Supporting Part Main Body 31b Opening 32 Rod-shaped Part 32a First Rod-shaped Part 32b Second rod-shaped part 33 Height adjustment part

Claims (8)

Two end rollers which are provided on a frame and whose axes intersect at a predetermined angle, and which are spanned between the two end rollers to form a planar fan shape, and a bead for belt positioning is attached to the outer peripheral edge. In a curved belt conveyor having an endless conveying belt, at least a part of the bead guide contacts the bead to position the conveying belt and suppress movement of the conveying belt,
a support fixed to the pedestal;
a rod-shaped portion formed of resin, supported by the support portion, extending from the support portion in a direction along the outer peripheral edge portion, and provided so that at least a portion thereof contacts the bead; ,
bead guide with 2. The bead guide according to claim 1, wherein said support portion is made of the same resin as said rod-shaped portion, and said support portion and said rod-shaped portion are integrally molded. The rod-shaped portion has a root portion supported by the support portion, and is inclined so that the distance from the conveying belt to the tip portion is greater than the distance from the conveying belt to the root portion. 3. The bead guide according to claim 1 or 2. The bead guide according to any one of claims 1 to 3, wherein the bar-shaped portion is curved along the outer peripheral edge. 5. The bead guide according to claim 4, wherein the rod portion has a curvature larger than the curvature of the outer peripheral portion of the conveying belt. two end rollers provided on a frame and whose axes intersect at a predetermined angle;
an endless conveying belt that is stretched between the two end rollers to form a planar fan shape and that has a belt positioning bead attached to the outer peripheral edge thereof;
a bead guide;
The bead guide is
a support fixed to the pedestal;
a rod-shaped portion formed of resin, supported by the support portion, extending from the support portion in a direction along the outer peripheral edge portion, and provided so that at least a portion thereof contacts the bead; , has
at least a part of the contacting the bead to position the transport belt and suppress the movement of the transport belt;
curved belt conveyor. 7. The curved belt conveyor according to claim 6, wherein the supporting portion is made of the same resin as the rod-shaped portion, and the supporting portion and the rod-shaped portion are molded integrally. The bead has a plate-like portion and a thick portion,
The curved belt conveyor according to claim 6 or 7, wherein the bead guide is provided so that the rod-like portion contacts at least the side surface of the thick portion.

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