JPH083370Y2 - A flat belt conveyor that hides the transport surface on the return path - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor which is configured to roll a belt in a lower traveling portion which is a return path so that its conveying surface faces inward.

[0002]

2. Description of the Related Art A flat belt conveyor of the type in which a flat endless belt is run in a flat state on both the forward and backward paths is well known, and the intermediate portion of the endless belt except for the forward and backward ends thereof is also known. Also known are so-called pipe conveyors that are rolled into a cylindrical shape and run (for example, Japanese Patent Publication No. 32-8725, Japanese Patent Publication No. 43-22698, Japanese Patent Publication No. 57-151508).
Is.

[0003]

[Problems to be solved by the invention] In the flat belt conveyor, since the conveying surface faces downward in the return path, when conveying the powder or granular material, the powder or granular material adhered to the conveying surface in the outward path is not returned. At, there is a risk that it will fall and scatter and contaminate the vicinity. This must be avoided as much as possible when the transported product is a poisonous substance, a combustible substance, or an expensive substance.

In order to prevent the scattering of the transported object, the entire conveyor may be covered with a cover. In such a case, the adhered matter that has fallen on the backward path side of the belt is
The belt accumulates on the bottom of the cover, and the belt comes into contact with and passes through the deposit, which increases the running resistance of the belt, and the deposit enters the shaft part of the guide roller to rotate the roller. There are problems such as causing defects.

Further, the conventional pipe conveyor has the following problems. (a) In a pipe conveyor where the outward path is rounded, the transport amount is determined by its cross-sectional area,
If overcharged, the belt and guide rollers will be overloaded, damaging them or rendering them inoperable.

(B) Therefore, in order to convey the same amount of objects as the flat belt, the lateral width of the belt must be significantly longer than that of the flat belt, for example, twice or more. However, the cost of the belt is much higher than that of the flat belt.

(C) The rubber on the outer surface of the pipe conveyor, which is rolled into an annular shape, is exposed to direct sunlight in an outdoor environment where no special cover is provided, and is therefore prone to deterioration.
This is particularly remarkable in the upper outward path.

(D) In a pipe conveyor in which both reciprocating paths are rolled into an annular shape, the rollers are once flattened by the rollers in the reversing running portion and then rounded. The number of times is 2 during one run. The outer rubber is stretched when it is rolled and it is rolled, which causes severe belt fatigue.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a novel belt conveyor which solves the above-mentioned problems in the conventional flat belt conveyor and pipe conveyor, and is characterized by a pair of front and rear drive drums. A belt conveyor in which an endless flat belt (1) is wound around (2) and a driven drum (3) and the drive drum (2) is rotated to circulate the flat belt (1). The support frames (5) are installed at appropriate intervals along the running direction of the flat belt (1) between the drums (2) and (3), and the support frames are provided.
A supporting roller (8) for supporting the flat belt (1) on the outward path in a flat or shallow gutter shape is provided on the upper part of (5), and the supporting frame (5) closest to the starting end of the flat belt on the return path side. ) At the bottom of
A plurality of rounding rollers (12) (13) for guiding the flat belt (1) to be gradually rolled in the traveling direction are arranged so as to form a gate shape in a front view, and other supporting frames (5) A plurality of shape-retaining rollers (11) are arranged in a lower part of the so as to form an annular shape in a front view, and a return path side of the flat belt (1) is arranged in a gate-shaped rounding roller (12) ( 13), and by passing between the shape-retaining rollers (11) arranged in an annular shape, the conveying surface is made inward, and both side ends are rolled into a cylindrical shape in which they overlap each other inward and outward so as to be rotated. The feature is that the conveyance surface is hidden on the return path.

[0010]

The flat belt has a flat or shallow gutter shape on the forward path on the transport side, and is automatically and smoothly rolled so that the transport surface is inward on the return path.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a belt conveyor according to the present invention, in which an endless flat conveyor belt (1) is wound around a rear driving drum (2) and a front driven drum (3) to form a flat belt (1). ) Is supported by a plurality of quadrangular support frames (5) arranged in parallel with each other at a predetermined interval by a connecting rod (4) which is parallel to (4). In addition, (6) in the same figure is a goods sending hopper, (7) is a goods receiving hopper.

As shown in FIG. 2, the outward belt (1a) is opened on the upper surface of each support frame (5) so that the outward belt (1a) is oriented in a direction perpendicular to the outward belt (1a) and the central portion is recessed. The support rollers 8 are arranged in a U shape, and are supported by a plurality of sets of supporting rollers 8 in the form of a trough that is shallowly curved in an upward arc shape. In addition, all the support rollers (8) may be horizontal and the outward belt (1a) may be supported in a flat shape.

A regular hexagonal hole is formed in the center of each support frame (5).
A support plate (9) having a hole (9a) is fixed, and six shape-maintaining rollers are provided with a pivot metal fitting (10) fixed along each side of the hexagonal hole (9a). The (11) is annularly arranged so as to form an inscribed circle having a diameter slightly smaller than the inscribed circle of the hole (9a).

The return belt (1b) passes through the holes (9a) in the support frames (5) and the shape-retaining rollers (11) arranged in an annular shape so that the conveying surface is inward. It is rolled into a cylindrical shape and runs.

Even with the above configuration alone, the return belt (1
b) is a flat-plate-shaped rear end (following drum (3) side) that gradually rolls naturally and passes through the first shape-maintaining roller (11) until both ends are inside and outside each other. Although they are in the form of overlapping cylinders, a belt rounding device as shown in FIG. 3 is provided between the rear end and the first shape-maintaining roller (11), or the front end (drive drum (2) side). A belt unfolding device symmetrical to the belt rolling device may be provided between the belt-rolling device and the shape-retaining roller (11) closest to the belt unrolling device.

FIG. 3 shows such a belt rounding device, in which the support frame (5) closest to the driven drum (3) faces the traveling direction of the return belt (1b) from the driven drum (3). There are provided two sets of rounding rollers (12), (12), (12) and (13), (13), (13) which form one set of three arranged in a generally gate shape in a front view.
Vertical rollers (12) (12) and (13) (1) on each side of each pair.
3) The mutual intervals are set so as to become gradually narrower between the width of the outward belt (1a) and the diameter of the inward belt (1b).

Therefore, the flattened return belt (1b) which drops the conveyed article on the load receiving hopper (7) is used as a driven drum.
After going around (3) from above, while passing through the above-mentioned rounding device, the upper and side surfaces are supported by the rounding rollers (12) and (13) to gradually form a gutter shape, and finally the overlapping portion is lowered. Rolled smoothly and surely into a cylindrical shape,
1) Enter inside.

Although not shown, the return belt (1b)
Return belt (1b) when passing through the belt deployment device.
Is deployed while being guided by a deployment roller (not shown) of the same configuration provided in the reverse order of the above-described rounding rollers (12) and (13) in the traveling direction, and is uniformly and smoothly deployed. It

[0019]

According to the present invention, the following effects can be obtained. (a) Run the endless flat belt on the outward side in a flat state,
In addition, since the return path side is rounded into a cylindrical shape and is run, it is possible to prevent the deposits from falling from the return path side in the flat belt conveyor.

(B) In order to convey the same amount of objects to be conveyed,
It is possible to use a belt having a width that is significantly narrower than the width of the belt of a conventional pipe conveyor.

(C) Since a rounding roller is provided in addition to the shape-retaining roller, the belt is gradually rolled smoothly, or conversely,
It can be deployed from the rolled state.

(D) Since the return path side of the belt is rolled in a cylindrical shape in which the conveying surface is inward and both ends overlap each other inward and outward, the belt is rolled so that the belt ends are butted against each other. Compared to the ones, it is less likely that the material to be transported attached to the transportation surface will fall off between the both end portions of the belt.

(E) In the pipe conveyor, the rubber on the outer surface which is rolled into an annular shape is used in the outside where no special cover is provided, particularly in the upper outward path.
It is prone to deterioration because it is exposed to direct sunlight, but according to the present invention, this is not the case.

(F) In a pipe conveyor in which both the reciprocating paths are rounded in an annular shape, in the reversing running portion, once flattened, the number of rounding is two times during one run, and the rounding is performed. At this time, the outer rubber is often stretched, and the belt is heavily fatigued. However, in the present invention, the number of times the rubber is once flattened and then rolled is halved.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view taken along the line AA in FIG.

FIG. 3 is an enlarged arrow view taken along the line BB in FIG.

[Explanation of symbols]

(1) Flat belt (1a) Forward belt (1b) Return belt (2) Drive drum (3) Driven drum (4) Connecting rod (5) Support frame (6) Load hopper (7) Load hopper (8) Support roller (9) Support plate (10) Pivot bracket (11) Shape retention roller (12) (13)
Rounding roller

Claims (1)

[Scope of utility model registration request] 1. An endless flat belt (1) is wound around a pair of front and rear driving drums (2) and driven drums (3), and the driving drum (2) is rotated to thereby rotate the flat belt (1). In a belt conveyor configured to circulate and circulate, the support frames (5) are installed at appropriate intervals along the traveling direction of the flat belt (1) between the drums (2) and (3). The support frame
A supporting roller (8) for supporting the flat belt (1) on the outward path in a flat or shallow gutter shape is provided on the upper part of (5), and the supporting frame (5) closest to the starting end of the flat belt on the return path side. ) At the bottom of
A plurality of rounding rollers (12) (13) for guiding the flat belt (1) to be gradually rolled in the traveling direction are arranged so as to form a gate shape in a front view, and other supporting frames (5) A plurality of shape-retaining rollers (11) are arranged in a lower part of the so as to form an annular shape in a front view, and a return path side of the flat belt (1) is arranged in a gate-shaped rounding roller (12) ( 13), and by passing between the shape-retaining rollers (11) arranged in an annular shape, the conveying surface is made inward, and both side ends are rolled into a cylindrical shape in which they overlap each other inward and outward so as to be rotated. A flat belt conveyor that conceals the conveying surface on the return path.