JP2000016542A - Curved belt conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curved guide device not marring an edge guide. SOLUTION: In is furnished with a fan-type conveyor belt 1 suspended around an idler arranged by crossing a shaft center and provided with the edge guide 2 along an outer peripheral part 13 and a curved guide device to guide the conveyor belt 1 in a fan shape by clamping the edge guide 2 from above and below, the edge guide 2 has an inside inclined surface, the curved guide device is arranged along the outer peripheral part 13, and an elastic belt 3 free to make contact with and separate from the inside inclined surface of the edge guide 2 vertically, making a set free to rotate is furnished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved conveyor belt device having a curved conveying path and used for a curved portion thereof.

[0002]

2. Description of the Related Art An outline of a conventional curved conveyor belt device used for a bending section is shown in a partially omitted plan view in FIG. 3 (a), and FIG. 3 (b) is a side view (bending guide) of the device. As shown in the figure, the sector is suspended by idlers 12 and 12 ′ arranged with their axes intersecting and the ear bar 2 is attached along the outer peripheral portion 13. And a bending guide device (such as a frame 5) that guides the conveyor belt 1 by curving it in a fan shape with the ear bar 2 sandwiched from above and below. The guiding device is the idler 1
It prevents the outer peripheral portion 13 of the conveyor belt 1 from sagging or wrinkling, which cannot be sufficiently tensioned by only 2 and 12 '. The conveyor belt 1 is driven by a driving unit (not shown).

The ear rail 2 is formed as a continuous ridge having a substantially triangular cross section on the upper surface of the outer peripheral portion 13 of the conveyor belt 1 suspended in a fan shape, and the bottom surface thereof is bonded to the upper surface (conveying surface) of the conveyor belt. (See FIG. 3B).

As shown in a partially enlarged side view (partial sectional view) of FIG. 4, a bending guide device 14 includes a frame 5 (see FIG. 3) disposed above the outer peripheral portion 13 and a frame 5 (see FIG. 3). 5, and can be vertically contacted and separated from the inner inclined surface of the ear bar 2 (referred to as a surface in the main direction of the fan),
A plurality of rotatable upper rollers 6 ′ whose axis x is parallel to the inner inclined surface of the ear bar 2, and a supporting roller 6 for supporting the back side (lower surface) of the surface of the conveyor belt 1 to which the ear bar 2 is attached. It has.

[0005] The frame 5 is supported along a peripheral portion 13 of the conveyor belt 1 on a gantry (not shown) that supports the conveyor belt 1. The upper part of the frame 5 projects above the inner inclined surface of the ear bar 2 of the conveyor belt 1. The upper roller 6 ′ is attached to the projecting portion of the frame 5 such that its axis x is parallel to the inner inclined surface of the ear bar 2 so as to be able to contact and separate from the inner inclined surface. The upper roller 6 'is individually designed according to the size and strength of the conveyor belt 1, but usually uses a commercially available metal roller bearing. A support roller 6 supporting the back side surface of the ear rail 2 supports the ear rail 2 from below, and an upper roller 6 ′.
Has the function of extending the conveyor belt 1 to the outside in cooperation with.

[0006]

However, in the curved conveyor belt device having the above-described bending guide device, the inner inclined surface of the ear bar is made of a hard material in accordance with the pulling force of the conveyor belt working inward. Since the upper roller is pressed more strongly, there is a problem that the ear rail is cracked in a short time of operation and tears occur. An object of the present invention is to provide a conveyor belt device having a bending guide device that does not damage the ear rail.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a curved conveyor belt device of the present invention is suspended by an idler arranged so as to intersect with an axis, and an ear bar is formed along an outer peripheral portion. A conveyor belt device comprising: a fan-shaped conveyor belt attached thereto; and a bending guide device for guiding the conveyor belt so as to sandwich the ear bar from above and below, so that the conveyor belt has a fan shape, wherein the ear bar has an inner inclined surface. A plurality of pulleys attached to the upper surface of the conveyor belt, wherein the bending guide device is disposed along the outer peripheral portion and is rotatable and can be vertically contacted with and separated from the inner inclined surface of the ear bar. An elastic belt suspended around the pulleys.

[0008] The curved portion of the curved conveyor belt device is such that the outer peripheral portion of the conveyor belt is longer than the inner peripheral portion and has a flat fan shape when extended, so that the idlers at both ends of the conveyor belt device have the same shape. It is provided in a fan shape with the axes intersecting. At the outer peripheral portion of the conveyor belt suspended around the idler, a continuous ridge is provided on at least one of the upper and lower sides, and in cooperation with a bending guide device described later in detail, the outer peripheral portion due to the inner and outer peripheral difference is provided. Prevent sagging of parts and wrinkling. In the case of only one of the upper side and the lower side, backup means (for example, a support roller) is required on the surface opposite to the surface on which the ear rail is attached.

The cross section of the ear bar is substantially triangular,
The bottom surface is adhered along the outer peripheral portion of the conveyor belt, and one side forms an inner inclined surface inclined inward. This cross section may be a trapezoid having an inner inclined surface as described in detail below. The conveyor belt is, for example, a polyester canvas used as a tensile member, and a sheet of polyurethane, soft vinyl chloride, or the like is laminated as a cover material on both surfaces or a transport surface thereof. Alternatively, it is formed by extruding a bondable material. In addition,
As described in detail below, it is preferable that the material of the ear bar is softer than the cover material.

[0010] In the bending guide device, a frame is arranged along the outer periphery of the conveyor belt to guide the outer periphery of the conveyor belt. The frame protrudes above the inner inclined surface of the ear rail, and supports a plurality of rotatable pulleys having an axis parallel to the inner inclined surface so as to be able to contact and separate from the inner inclined surface. ing. The number of pulleys is designed by the length of the outer periphery of the conveyor belt and the inward forces acting on it. An elastic belt is suspended between two or more sets of pulleys of the plurality of pulleys, and the elastic belt comes into contact with or separates from the inner inclined surface of the ear bar by the movement of the pulley. That is, by pushing the ear rail to the outer peripheral side by the elastic belt, the outer peripheral portion of the conveyor belt is prevented from being drawn inward and wrinkled. Further, by contacting the soft elastic belt with the inner inclined surface, the ear bar made of polyurethane, soft vinyl chloride or the like is not damaged. Further, since the axis of the pulley for suspending the elastic belt is parallel to the inner inclined surface, the elastic belt abuts perpendicularly to the inner inclined surface,
Due to the increased contact area, the earpiece is less likely to be damaged.

According to a second aspect of the present invention, there is provided the curved conveyor belt device, wherein the inside of the elastic belt suspended between the pulleys forming the set of the bending guide device is not in contact with the pulley, and the rear surface thereof is not in contact with the pulley. A slider is provided at a portion facing the ear rail.

The elastic belt suspended between the pair of pulleys abuts on the inner inclined surfaces of the ear bars at the portions suspended by the pulleys, but does not abut on the pulleys.
That is, the portion that is not backed up travels straight and does not contact the inner inclined surface, so that the outer peripheral portion (ear rail) of the conveyor belt cannot be pushed and spread. Therefore, the slider is pressed against a portion which does not contact the pulley inside the elastic belt and whose back surface faces the ear bar, that is, a portion where the ear bar is not held down, thereby holding down the elastic belt. As a result, the elastic belt is pressed against the inner inclined surface in a wider range, and the holding force per unit length of the ear bar works with a lighter force, so that the ear bar is less damaged.

[0013] In the curved conveyor belt device according to the third aspect, the material of the back surface of the elastic belt is formed of an elastic body which is more flexible than the ear rail. The ear rail is designed with a material close to the cover material of the conveyor belt, and the back surface of the elastic belt that comes into contact with the ear rail is made of an elastic material (rubber, polyurethane, or the like) softer than the ear rail. As a result, by repeating contact and separation, only the elastic belt is damaged, the damage to the ear rail is reduced, and the life thereof can be extended.

According to a fourth aspect of the present invention, there is provided a curved conveyor belt device, wherein the bending guide device is disposed along an outer peripheral portion of the conveyor belt, and is capable of abutting / separating perpendicularly to an inner inclined surface of the ear bar and rotatable. A plurality of pulleys are provided, and an elastic body which is more flexible than the ear studs is wound around the outer periphery of the pulleys. In order to urge the outer peripheral portion of the conveyor belt in the outer peripheral direction, the ear rail was conventionally pushed by a metal roller, but by replacing this with a pulley wound with an elastic body softer than the ear rail around the outer peripheral edge. Since only the soft elastic body comes into contact with the ear rail, the damage to the ear rail can be reduced.

According to a fifth aspect of the present invention, the cross section of the ear rail is trapezoidal having an inner inclined surface.
The cross section of the conventional ear bar is substantially triangular, and when the inner inclined surface is urged in the outer circumferential direction, the upper end of the ear bar is easily bent outward, which may cause cracks or scratches, but the cross section is trapezoidal This reduces the bending of the upper part, reduces the damage to the ear rail, and extends the life of the conveyor belt.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a curved conveyor belt device according to the present invention will be described below with reference to the drawings.

The outline of the curved conveyor belt apparatus of this embodiment is similar to that of the conventional apparatus except for the bending guide device 14, and FIG.
FIG. 3A is a plan view (partially omitted), and FIG. 3B is a side view (partly omitted, such as a bending guide device, and a partial cross section). FIG.
1 is a partially enlarged view of the bending guide device 14 of the present invention, FIG. 1 (a) is a partial side view (partial cross section), and FIG. 1 (b) is a partial plan view. FIG. 2 is a plan view showing a state where the slider 10 according to claim 2 is mounted.

As shown in FIG. 3 (a), the outline of the curved conveyor belt device of this embodiment is suspended around idlers 12, 12 'arranged so as to intersect with the axis, and along the outer peripheral portion 13. A conveyor belt 1 having a fan-shaped plan view in which continuous ear bars 2 are provided, a bending guide device 14 for sandwiching the ear bars 2 from above and below and guiding the outer periphery so as to form the conveyor belt 1 in a fan shape; It has.

For example, the conveyor belt 1 is formed by laminating two layers of polyester canvas with polyurethane to form a core, and further laminating a polyurethane sheet on the surface thereof to form a belt having a predetermined thickness (for example, 1.5 mm). Then, it is punched into a fan shape and joined into a fan-shaped ring shape having a predetermined length. The joining method is designed according to the application such as a finger method and an overlap method. The conveyor belt 1 is suspended by idlers 12, 12 'arranged so as to intersect with the axis, and travels in the reverse direction with the forward and backward paths approaching up and down (drive means not shown). A table (a metal plate or a plastics plate, not shown) or a plurality of guide rollers is provided in contact with the lower surface of the forward conveyor side (upper side) conveyor belt 1 to prevent the conveyor belt 1, particularly its outer peripheral portion 13, from sagging. Often do.

At least one of the upper and lower surfaces (upper surface in the embodiment) of the outer peripheral portion 13 of the conveyor belt 1 is provided with the inner inclined surface 1.
An ear bar 2 having an arm 5 is attached all around. The cross section of the ear bar 2 is substantially triangular, and the bottom side is adhered to the surface of the conveyor belt 1 (see FIG. 1A). The cross section may have a trapezoidal shape as long as it has the inner inclined surface 15. In the case of the trapezoid, there is a feature that even when the inner inclined surface 15 is pressed by the pulley or the elastic belt 3, the upper portion is not distorted and the ear bar 2 is less damaged. The ear rail 2 is an elastic body that repeatedly withstands bending, and is attached or physically attached to the outer peripheral portion 13.

As shown in FIG. 1 (a), the bending guide device 14 has a frame 5 arranged along the outer peripheral portion 13 and has an axis x parallel to the inner inclined surface 15 of the ear bar 2. A large number of free pulleys 4 are brought into contact with the inner slope 15 of the ear bar 2.
It is attached so that it can be separated.

The frame 5 is supported on a gantry (not shown) that supports the conveyor belt 1 along an outer peripheral portion 13 of the conveyor belt 1, and the upper portion thereof is disposed on the conveyor belt 1.
Project above the inner inclined surface 15 of the ear bar 2. The pulley 4 has an axial center parallel to the inner inclined surface 15 of the ear rail 2 at the projecting portion of the frame 5, and has an inner inclined surface 15.
It is installed so that it can contact and separate. The number of pulleys 4 is individually designed according to the size and strength of the conveyor belt 1.

As shown in FIG. 1B, the elastic belt 3 is hung by the adjacent pulleys 4 and 4 ', and when the pulleys 4 and 4' approach the inner inclined surface 15, the back of the elastic belt 3 Abuts on the inner inclined surface 15. When the conveyor belt 1 runs, the elastic belt 3 rotates while urging the ear bar 2 outward by the driving force. The elastic belt 3
Is a rubber belt used for an ordinary power transmission belt and the like, and the back portion thereof is made of an elastic material such as rubber or polyurethane. There is no damage to the ear bar 2. Further, by making the elastic belt 3 a material softer than the ear rail 2, only the elastic belt 3 is damaged without damaging the ear rail 2, and it is not necessary to replace the conveyor belt 1 by replacing this.

The number of pulleys 4 for suspending one elastic belt 3 may be two. However, by suspending the elastic belt 3 around three or more pulleys 4, at least three places are provided by the one elastic belt 3. Can be energized. As a result, the pressing force can be designed to be small at one place, and the damage to the ear rail 2 is further reduced.

FIG. 2 is a plan view showing another embodiment of the present invention.
The elastic belt 3 is suspended around the two pulleys 4, 4 ′, and the slider 10 is provided inside a portion of the elastic belt 3 that does not come into contact with the pulleys 4, 4 ′, and whose back surface faces the ear bar 2. The elastic belt 3 is urged outward so that the
Press against Thus, the ear bar 2 can be suppressed in a wider range. The portion of the slider 10 that comes into contact with the elastic belt 3 has a shape along the inner inclined surface 15 of the ear bar 2 and is formed of metal, plastics, or the like and has a small coefficient of friction with the inside of the elastic belt 3. . As a result, the slider 10 is supported by the frame 5 and approaches and separates from the ear rail 2 integrally with the elastic belt 3.
Is urged in the direction of the ear bar 2 while sliding. Since the force for urging the ear bar 2 is supported by a continuous surface, the urging force per unit length can be designed to be small, so that the load on the ear bar 2 can be reduced.

The ear rail 2 of the conveyor belt 1 may be attached to either the upper or lower side, or may be attached to both sides.
In the former case, a support roller 6 for sandwiching and supporting the ear rail 2 is provided on the opposite surface to which the ear rail 2 is attached. This prevents the urging force of the elastic belt 3 from being eliminated by the escape of the ear bar 2.

Further, instead of the elastic belt 3 shown in FIG.
An elastic body can be wound directly around the pulley 4. As the elastic body, a material similar to the material of the back surface of the elastic belt 3 is used, and the thickness may be any as long as it can exhibit elasticity.
mm to 10 mm are preferred. It has a feature that the structure is simpler than the elastic belt 3.

[0028]

As is apparent from the above description,
In the curved conveyor belt device according to the first aspect, the ear rail is urged in the outer circumferential direction by the elastic belt whose back surface is an elastic body, so that the ear rail can be used for a long time without being damaged. Assuming the same specifications and operating conditions for the conveyor belt,
In an actual machine running test, a running time approximately twice as long as that of the conventional pressing roller system was obtained.

According to the curved conveyor belt device of the second aspect, since the ear rail is urged in the outer circumferential direction within the range where the slider backs up, the urging force in the unit length of the ear rail can be reduced. This can further extend the life of the ear bar.

According to the curved conveyor belt device of the third aspect, the back surface of the elastic belt is made of a material softer than the ear bar, and when the elastic belt comes into contact with, separates from, and slides from each other, only the soft elastic belt side is distorted. , The life of the ear bars can be further extended.

According to the curved conveyor belt device of the fourth aspect, since a pulley having a soft elastic body wound around the ear bar is used instead of the metal roller, the roller can be used without damaging the ear bar. The life of the ear rail can be extended only by replacing the pulley.

In the curved conveyor belt device according to the fifth aspect, since the cross section of the ear bar is trapezoidal, even if a pressing force in the outer circumferential direction is applied to the inner inclined surface by the bending guide device, the cross section is smaller than the triangular ear bar. As a result, the upper portion has less distortion, and is less likely to be damaged or cracked.

[Brief description of the drawings]

FIG. 1 is a partially enlarged view of a curved conveyor belt device according to an embodiment of the present invention, and FIG. 1 (a) is a partial cross section showing a state in which a pulley 4 around which an elastic belt 3 is suspended is in contact with an ear bar 2; Figure,
FIG. 1B is a plan view thereof.

FIG. 2 is a partially enlarged plan view showing a bending guide device equipped with a slider 10 according to the embodiment of the present invention.

3 (a) is a plan view (partially omitted) of the present invention and a conventional curved conveyor belt device, and FIG.
Is a side view (partially omitted, partially represented in cross section).

FIG. 4 is a partial cross-sectional view of a conventional roller type bending guide device.

[Explanation of symbols]

 1: Conveyor belt 2: Ear rail 3: Elastic belt 4: Pulley 5: Frame 6: Support roller 10: Slider 12, 12 ': Idler 13: Outer peripheral portion 14: Bend guide device 15: Inside inclined surface

Claims (5)

[Claims] 1. A fan-shaped conveyor belt suspended by idlers arranged with their axes crossing each other and provided with ear bars along an outer peripheral portion; and a fan-shaped conveyor belt sandwiching the ear bars from above and below. A curved conveyor belt device having a bending guide device for guiding the outer peripheral portion of the outer peripheral portion, wherein the ear bar has an inner inclined surface and is attached to an upper surface of the conveyor belt, and the bending guide device is provided on the outer periphery. A plurality of pulleys which are arranged along the portion, and which are rotatable and vertically contactable / separable from the inner inclined surface of the ear bar, and an elastic body suspended between pulleys forming a set of the pulleys A curved conveyor belt device comprising a belt. 2. A slider is provided inside the elastic belt suspended by the pair of pulleys, the slider not being in contact with the pulley and having a rear surface facing the ear rail. 3. The curved conveyor belt device according to claim 1. 3. The curved conveyor belt device according to claim 1, wherein a material of a back surface of the elastic belt is an elastic body having better flexibility than the ear rail. 4. A fan-shaped conveyor belt suspended by idlers arranged with their axes crossing each other and provided with an ear bar along an outer peripheral portion, and the conveyor belt has a fan-shaped conveyor belt sandwiching the ear bar from above and below. A curved conveyor belt device provided with a bending guide device for guiding to become, wherein the ear rail is attached to the upper or lower surface of the conveyor belt with an inner inclined surface, the bending guide device, A plurality of pulleys are disposed along the outer peripheral portion, are rotatable perpendicularly to an inner inclined surface of the ear bar, and are rotatable. A curved conveyor belt device characterized by winding an elastic body having excellent flexibility. 5. The curved conveyor belt device according to claim 1, wherein the cross section of the ear bar is a trapezoid having an inner inclined surface.