JP2000016541A - Curved conveyor belt device - Google Patents

Abstract

(57) [Problem] In a conventional curved conveyor belt device having an ear rail and a bending guide device, the area of the upper surface of the conveyor belt is restricted by the overhanging portion of the frame, and the area on which the conveyed object is loaded and conveyed is limited. There are problems. SOLUTION: Idler 12, 12 'arranged in a fan shape.
And a bending guide device 14 that guides the ear bar 2 of the conveyor belt 1 from above and below so as to form a fan shape. , The ear rail 2 has a continuous groove 20 in its longitudinal direction at the upper part, and the bending guide device 14 is vertically moved up and down with the frame arranged along the outer peripheral part 13, and the groove of the ear rail 2 20 is provided with a large number of rotatable pressing rollers 4 which can be fitted and separated and are rotatable.

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 used in a curved portion of a conveyor belt device having a curved conveyance path.

[0002]

2. Description of the Related Art An outline of a conventional conveyor belt device used for a bending portion will be described with reference to FIG. 2 showing an embodiment of the present invention. FIG. 2B is a side view (partly sectional view) of the device. As shown in the figure, a fan-shaped conveyor is suspended around idlers 12, 12 'arranged so that their axes intersect, and is fitted with an ear bar 2' (see FIG. 3) along the outer peripheral portion 13. It has a belt 1 and a bending guide device (frame 5 or the like) for guiding the ear bar 2 so that the conveyor belt 1 has a fan shape with the ear bar 2 ′ (see FIG. 3) sandwiched from above and below. This is because the outer peripheral portion 13 of the conveyor belt 1 cannot be sufficiently fan-shaped by only the idlers 12 and 12 ', and the outer peripheral portion has a problem of sagging or wrinkling. The conveyor belt 1 is driven by a driving unit (not shown).

An ear bar 2 '(see FIG. 3) 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, the bottom surface of which is the upper surface of the conveyor belt. (Conveying surface). As shown in a partially enlarged side view (partial cross-sectional view) of FIG. 3, the bending guide device 14 includes a frame 5 (see FIG. 2) disposed along the outer peripheral portion 13 and supported by the frame 5. The rotation is such that it can be perpendicularly contacted and separated from the inner inclined surface of the ear bar 2 ′ (the surface in the direction of the fan) and the axis x is parallel to the inner inclined surface of the ear bar 2 ′. It comprises a plurality of freely movable upper rollers 6 'and a supporting roller 6 for supporting the back side (lower surface) of the surface of the conveyor belt 1 on which the ear bars 2' are attached.

[0004] 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 ′ (see FIG. 3) of the conveyor belt 1. The upper roller 6 '
The overhanging portion has its axis parallel to the inner inclined surface of the ear bar 2 'and is attached to the inner inclined surface so as to be able to contact and separate therefrom. 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. The support roller 6 supporting the back side surface of the ear rail 2 ′ supports the ear rail 2 ′ from below,
It has a function of extending the conveyor belt 1 outward in cooperation with the upper roller 6 '.

[0005]

However, in the curved conveyor belt device having the above-described bending guide device, the inner slope of the ear rail is in response to the pulling force of the conveyor belt acting inward (in the direction of the sector). It is necessary to press the surface, and the frame supporting the upper roller projects more inward than above the ear rail. On the other hand, the conveyor belt is preferably such that the upper surface thereof is opened as widely as possible in order to convey the goods on the upper surface thereof.
There is a problem that the area of the upper surface of the conveyor belt is restricted by the overhanging portion of the frame.

It is an object of the present invention to provide a curved conveyor belt device having a wide conveying surface.

[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 with its axis intersecting, and has a continuous ear along an outer peripheral portion. A curved conveyor belt device comprising: a fan-shaped conveyor belt provided with bars, and a bending guide device that guides the conveyor belt so as to form a fan shape by sandwiching the ear bars from above and below, wherein an upper portion of the ear bars is provided. The bending guide device has a groove portion that is continuous in the length direction, and the bending guide device is provided along the outer peripheral portion of the conveyor belt, and is supported by the frame, and is vertically movable and rotatable in a vertical direction. And a plurality of rollers whose peripheral portions can be fitted into the grooves of the ear bars.

The curved portion of the conveyor belt device has a longer outer peripheral portion than the inner peripheral portion of the conveyor belt, and has a flat fan shape when extended. Accordingly, the idlers at both ends of the curved conveyor belt device are provided such that their axes intersect. The outer peripheral portion of the conveyor belt suspended by the idler is provided with a continuous protruding ridge, and the outer peripheral portion of the conveyor belt is formed in cooperation with a bending guide device described later in detail by an inner and outer peripheral difference. To prevent wrinkles from occurring. A back-up means (for example, a support roller) is attached to the back of the surface of the conveyor belt on which the ear rail is attached.

The ear rail is a ridge attached along the outer periphery of the curved conveyor belt, and has a continuous groove in its length direction at the top. Therefore, the cross section of the ear bar is substantially trapezoidal with a concave shape at the top. In addition, the conveyor belt is, for example, a polyester canvas used as a tensile member, a polyurethane material as a cover material on both sides or a transport surface, a sheet of soft vinyl chloride or the like is laminated,
The ear bar is formed by extruding an elastic material which is the same as or can be bonded to the cover material.

[0010] The bend guide device includes a frame along the outer periphery of the conveyor belt. A plurality of rollers described later are rotatably and vertically supported so as to be vertically movable, and are provided along an outer peripheral portion thereof to guide the conveyor belt in a fan shape. Since the roller is rotatably supported, it rotates according to the running of the conveyor belt when fitted in the groove of the ear rail,
There is no load on the running of the conveyor belt. Since the rollers vertically move up and down above the ear rail, the frame and the like do not protrude inward from the ear rail, and a wide conveying surface of the conveyor belt can be secured.

Since the outer peripheral edge of the roller can be fitted in the groove of the ear rail, when the roller is lowered, the outer peripheral edge fits in the groove of the ear rail to guide the conveyor belt. The outer peripheral edge of the roller urges the ear rail in the outer peripheral direction to guide the conveyor belt without wrinkling in the outer peripheral part.

[0012] In the curved conveyor belt device according to the second aspect, an elastic body softer than the ear rail is wound around the outer peripheral edges of the plurality of rollers. The ear rail is designed from a material close to the cover material of the conveyor belt, but the outer peripheral edge of the pulley that comes into contact with the ear rail is made of an elastic material (rubber, polyurethane, or the like) softer than the material of the ear rail. Thus, when the outer peripheral portion of the conveyor belt is urged in the outer peripheral direction to repeatedly contact and separate from each other, only the outer peripheral edge portion of the roller is damaged, the ear rail is less damaged, and the life of the conveyor belt is prolonged. be able to.

According to a third aspect of the present invention, the inner side wall of the groove of the ear bar is designed to be lower than the outer side wall. If the inner side wall of the ear rail is high, it is necessary to raise the roller higher than the inner side wall when replacing a roller damaged by use. Since the rollers are mounted inside the frame, the replacement of the rollers is to be removed in the inward direction, and the lower inner side wall facilitates the removal and mounting. In addition,
By designing the outer side wall to be thicker than the inner side wall, it is possible to prevent the ear rail from rolling over due to the outer side wall being urged outward, thereby extending the life of the ear rail.

[0014]

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 curved conveyor belt device of the present embodiment is shown in FIG.
2A is a plan view, FIG. 2B is a side view (partial cross section), FIG. 1 is a partially enlarged view of the bending guide device 14, and FIG. 1 (b) is a front view of a part thereof.

The outline of the curved conveyor belt device is the same as that of the conventional one, and as shown in FIG. 2 (a), it is suspended by idlers 12, 12 'whose upper surfaces are horizontally arranged across the axis. A conveyor belt 1 provided with an ear bar 2 continuous along an outer peripheral portion 13, and a bending guide device 1 for guiding the conveyor belt 1 in a fan shape with the ear bar 2 sandwiched from above and below.
4 is provided.

The conveyor belt 1 is formed, for example, 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 in a fan shape crossing the axis, and travels in the reverse direction with the forward and backward paths approaching vertically (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 conveyor belt 1 on the outward transport side (upper side) to prevent the conveyor belt 1, especially its outer peripheral portion 13 from hanging down. Often prevents. On the upper surface of the outer peripheral portion 13 of the conveyor belt 1, an ear bar 2 having a groove 20 at the top is attached to the entire periphery. The ear bar 2 has a concave trapezoidal shape having a semicircular groove 20 at the top in cross section, and the bottom part is a conveyor belt 1.
(See FIG. 1A). In addition, ear bar 2
Is an elastic body that withstands repeated bending, and is bonded or physically attached to the outer peripheral portion 13.

As shown in a partial sectional view of FIG. 1 (a), the bending guide device 14 fits the frame 5 arranged along the outer peripheral portion 13 and the outer peripheral edge portion 21 into the groove portion 20 of the ear bar 2. A possible pressing roller 4 is rotatably mounted on the groove 20 so as to be able to approach and separate therefrom. The frame 5 is supported by a gantry (not shown) that supports the conveyor belt 1, and the upper portion of the frame 5 stands vertically near the outer peripheral portion 13 of the conveyor belt 1. The pressing roller 4 is located above the ear bar 2 and is perpendicular to the frame 5 (arrow x).
It is supported to be able to move up and down. Since the pressing roller 4 moves up and down in a direction perpendicular to the ear rail 2, the frame 5 and the pressing roller 4 do not protrude inside the ear rail 2, and the conveyor belt 1
The upper surface (transport surface) can be used to the maximum. The number of the pressing rollers 4 is individually designed according to the size and strength of the conveyor belt 1.

The outer peripheral edge 21 of the pressing roller 4 has a shape that can be fitted in the groove 20 of the ear bar 2, and when it is lowered, it fits in the groove 20. When the conveyor belt 1 travels in this state, the pressing roller 4 urges the outer side wall (the side wall facing the frame 5) of the ear bar 2 in the outer peripheral direction, and suppresses the inward force due to the tension of the conveyor belt. This prevents wrinkles in the outer peripheral portion of the conveyor belt. Thereby, the outer peripheral portion 13 of the conveyor belt 1 is
Runs in a fan shape. The outer peripheral edge 21
Is shaped to fit into the groove 20, and is formed of a material softer than the material of the ear bar 2 (polyurethane, soft PVC, etc.). Thereby, the outer peripheral edge 2 of the pressing roller 4
Even if 1 repeatedly fits into and separates from the groove 20 of the ear bar 2, the ear bar 2 will not be damaged.

The back surface of the conveyor belt 1 to which the ear rail 2 is attached is provided with a support roller 6 for supporting the ear rail 2 from below. This prevents the biasing force of the pressing roller 4 in the outer peripheral direction from being canceled by the escape below the ear rail 2. Further, an elastic body can be fitted to the outer peripheral edge of the support roller 6. The elastic body can prevent the back surface of the outer peripheral portion of the conveyor belt from being damaged.

[0021]

As is apparent from the above description,
In the curved conveyor belt device according to the first aspect of the present invention, the pressing roller 4 vertically moves up and down, presses the ear bar, cancels the tension in the inward direction, and wrinkles around the outer peripheral portion of the conveyor belt. To prevent At this time, since the pressing roller 4 moves up and down vertically, the supporting frame does not protrude inward from above the ear rail, so that the conveying surface of the conveyor belt can be used most widely.

In the curved conveyor belt device according to the second aspect, an elastic body softer than the material of the ear bar is wound around the outer peripheral edge of the pressing roller, so that the outer peripheral edge of the pressing roller is pressed against the ear bar to move in the outer circumferential direction. When energized, the outer peripheral edge is damaged, and the ear rail is less damaged. As a result, the life of the ear bar, that is, the life of the conveyor belt can be further extended.

In the curved conveyor belt device according to the third aspect, the inner side wall of the groove of the ear rail is designed to be lower than the outer side wall, so that the damaged holding roller can be easily replaced and the setup time can be shortened.

[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-sectional view showing a state in which a pressing roller 4 is in contact with an ear bar 2, and FIG. ) Is the front view.

FIG. 2 shows an outline of a curved conveyor belt device according to an embodiment of the present invention, and FIG.
(b) is the same side view.

FIG. 3 is a partial sectional view of a conventional curved conveyor belt device.

[Explanation of symbols]

 1: Conveyor belt 2: Ear rail 4: Holding roller 5: Frame 6: Support roller 12, 12 ': Idler 13: Outer peripheral portion 14: Bending guide device 20: Groove portion 21: Outer peripheral edge portion

Claims (3)

[Claims] 1. A fan-shaped conveyor belt which is suspended by an idler arranged with its axis intersecting and provided with a continuous ear bar along an outer peripheral portion, and said conveyor belt sandwiching said ear bar from above and below. A curved conveyor belt device having a bending guide device that guides the conveyor belt so that it has a fan shape, comprising a groove portion that is continuous in a length direction at an upper portion of the ear bar, and wherein the bending guide device is provided on the conveyor belt. A frame provided along the outer peripheral portion, and a plurality of rollers supported by the frame, which are vertically movable and rotatable, and whose outer peripheral portion is fittable into the groove of the ear bar. A curved conveyor belt device. 2. The curved conveyor belt device according to claim 1, wherein an elastic body having higher flexibility than the ear rail is wound around an outer peripheral edge of the roller. 3. The curved conveyor belt device according to claim 1, wherein an inner side wall of the groove is lower than an outer side wall.