JP2003252414A - Air-floating type belt conveyer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a return side trough, a cover and the like to be installed, so as to reduce a size of a conveyer as the whole, and to reduce a running cost and a manufacturing cost. <P>SOLUTION: In this air-floating type belt conveyer for making a carrier side belt 1a travel under the condition where the belt 1a is floated up by supplying air between a carrier side trough 2 and the carrier side belt 1a, a return side belt 1b is positioned in an upper side of the carrier side belt 1a, and is arranged to travel under the condition where the belt 1b is supported by a side edge portion 6 of the carrier side trough 2. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air levitation belt for running a carrier-side belt for carrying a lump, granular or powdery load of ore, coal, grain, etc. in a state of being floated by an air layer. Conveyor related.

[0002]

2. Description of the Related Art Generally, a belt conveyor is used to continuously convey lumps, granules, and powders of ores, coal, grains, etc., and one of them has a structure as shown in FIG. Is proposed. The belt conveyor shown in FIG. 7 includes a carrier-side trough 2 and a return-side trough 3 each having an arcuate cross section, and a belt 1 on which an object X is placed on an upper surface side thereof.
The belt 1 and the troughs 22 and 23 are arranged.
An air levitation method is adopted in which air is supplied between the two to form an air layer and the belt 1 travels while levitating.

This belt conveyor is provided with ducts 26 and 27 on the lower surfaces of the troughs 22 and 23 for guiding the belt 1, and a large number of air holes 24 and 25 along the longitudinal direction at the widthwise centers of the troughs 22 and 23. Is provided. And
By sending air from the blower 28 to each duct 26, 27, air is jetted upward from each air hole 24, 25, thereby forming an air layer between the belt 1 and each trough 22, 23. The belt 1 moving on the troughs 22 and 23 is floated. By adopting such a configuration, the resistance acting on the belt is reduced as compared with the roller type belt conveyor, and the load of driving the belt is reduced and the noise and vibration are reduced.

[0004]

By the way, in this air floating type belt conveyor, the carrier side and the return side of the belt 1 are configured to run individually. Therefore, not only the carrier side trough 2 and the return side trough 3 are arranged separately, but also the duct 2
6, 27, etc., each also needs an air supply path for levitating the belt 1, which not only increases the size of the entire conveyor but also increases the manufacturing cost.

Further, when dust such as a powdery substance is generated during transportation, it is necessary to surround the belt 1 to be transported in order to prevent environmental pollution of the surroundings. Therefore, the carrier side trough 22 is provided.
A cover 29 is installed on the upper surface of the. Similarly, since powdery substances are attached to the belt 1 on the return side,
A side plate 30 is installed between the troughs 22 and 23 so as to surround it. Therefore, to prevent these dusts, the cover 2
If the 9 and the side plate 30 are installed over almost the entire length of the conveyor, an increase in cost is inevitable when the entire length of the conveyor is long.

The present invention has been made to solve the above-mentioned problems. The return-side belt is made to run above the carrier-side belt so that it also serves as a cover for the carrier-side trough, and the return-side trough and cover are installed. An object of the present invention is to provide an air levitation type belt conveyor that can reduce the operating cost and the manufacturing cost as well as reduce the size of the entire conveyor by making it unnecessary.

[0007]

In order to achieve the above object, the invention according to claim 1 raises the carrier-side belt by supplying air between the carrier-side trough and the carrier-side belt. An air-floating type belt conveyor that is run in a state in which the return-side belt is arranged to run above the carrier-side belt and supported by the side edge portion of the carrier-side trough. Characterize. In this air levitation type belt conveyor, the air used for levitation of the carrier side belt further acts to support the return side belt from below, so that the return side trough becomes unnecessary. Moreover, since the return side belt travels above the carrier side belt and is supported by the side edge portion of the carrier side trough, the top side of the carrier side belt is blocked by the return side belt and the cover Since air for floating the side plate and the return side belt is not required, the conveyor as a whole can be downsized, and the operating cost and the manufacturing cost can be reduced. Incidentally, in the return side belt, since the load carrying side faces inward, scattering of dust and the like adhering to the return side belt is also prevented at the same time.

According to a second aspect of the present invention, in the air levitation type belt conveyor according to the first aspect, the side edge portion of the carrier side trough is formed in a U-shaped cross section so as to surround the ear portion of the return side belt. Characterize. In this air levitation type belt conveyor, the side edge of the carrier-side trough is formed in a U-shaped cross section so as to surround the ear portion of the return-side belt. By controlling the side edge part and positioning the return side belt in the width direction, it is possible to prevent the closed space above the carrier side belt from being inadvertently opened, and to ensure that the function as a cover is exhibited. There is.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the air levitation type belt conveyor, a predetermined coating is applied to at least one of the side edge portion of the carrier side trough, the surface facing the return side belt, and the ear portion of the belt. In this air-floating belt conveyor, a coating with low wear resistance and a low coefficient of friction is applied to at least one of the side edge portion, the surface facing the return belt, and the ear portion of the belt. Even when the ears come into contact with the side edge portions, it is possible to prevent damage to the side edge portions and the belt ears due to the presence of the coating, and to prevent resistance to belt running.

The invention according to claim 4 is the invention according to claim 1 or 2.
In the air floating type belt conveyor, the roller is arranged at a side edge portion of the carrier side trough and at a portion facing the return side belt. In this air levitation type belt conveyor, the rollers are arranged at the side edge portion facing the return side belt, and therefore even if the return side belt comes into contact with the side edge portion, the rollers are rotated to cause the side rotation. It is possible to prevent damage to the edge portions and the belt ears and to prevent the belt from running.

According to a fifth aspect of the present invention, in the air levitation type belt conveyor according to the first to fourth aspects, a scraper for dropping the load conveyed by the carrier side belt from the belt is arranged. . In this air levitation type belt conveyor, a scraper for dropping the load from the belt is arranged, so that the load carried by the carrier belt can be reliably and easily detached from the belt by the scraper. Become.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. 1 is a front sectional view showing an embodiment of an air levitation type belt conveyor according to the present invention, and FIG. 2 is a perspective view of the air levitation type belt conveyor shown in FIG. As shown in FIGS. 1 and 2, this air-floating belt conveyor is provided with a carrier-side trough 2 having an arcuate cross section, and a carrier-side belt 1a (belt 1) on which an object X is placed is arranged on the upper surface side thereof. Is.

The carrier-side trough 2 for guiding the carrier-side belt 1a is provided with a duct 3 on the lower surface, and a large number of air holes 4 are provided in the widthwise center of the trough along the longitudinal direction. Then, by blowing air from the blower 5 into the duct 3, air is jetted upward from each air hole 4, whereby an air layer is formed between the carrier side belt 1a and the carrier side trough 2, and the carrier side trough is formed. 2 The carrier side belt 1a moving on the upper surface is floated.

Side edge portions 6 on both sides of the carrier side trough 2
Supports the ears 7 of the return-side belt 1b and is formed to have a U-shaped cross section so as to surround the ears 7. The return-side belt 1b is arranged so that the ears 7 on both sides run while being supported by the side edge portions 6 of the carrier-side trough 2. At this time, as shown in FIG. 1, the air ejected from the duct 3 and the air hole 4 is discharged into the carrier side trough 2 through the lower surface of the carrier side belt 1a, but the return side belt 1b causes the carrier side belt 1a. Since the upper part of the trough is blocked, the trough 2 on the carrier side
As a result, the internal pressure is increased, and this internal pressure acts to levitate the return side belt 1b.

The air in the carrier-side trough 2 is discharged to the outside through the space between the return-side belt 1b and the side edge portion 6. Therefore, since an air layer is formed between the return side belt 1b and the side edge portion 6, the return side belt 1b
The ears 7 are separated from the inner surface of the side edge portion 6 in the vertical direction and the width direction, so that a so-called non-contact state is secured. In addition, since the side edge portion 6 is formed in a U-shaped cross section, the return side belt 1a is restricted from moving in the width direction, whereby the return side belt 1b shifts and travels, and the carrier side trough 2 moves. It prevents the upper part from being opened carelessly.

The shape of the side edge portion 6 is not limited to that shown in the figure. For example, if the movement of the return side belt 1b in the width direction is secured by another restricting member, the cross section Instead of the shape, a simple plate shape may be used. The side edge portion 6 can also be used as a flange for installing the carrier side trough 2 on a gantry (not shown).

Further, depending on the load X of the carrier side belt 1a, a large amount of air may be supplied from the duct 3, but in this case, the internal pressure in the carrier side duct 2 becomes too high, and the return side belt 1b is formed. It is assumed that the carrier-side trough 2 is lifted more than necessary, and the carrier-side trough 2 is opened to form a convex shape on the upper side. In order to prevent this,
By arranging the pressing roller 16 above the center of the return side belt 1b at a predetermined interval along the lengthwise direction of the belt, the pressing roller 16 can prevent abnormal floating of the return side belt 1b. .

FIG. 3 shows another embodiment of the side edge portion 6. 1 and 2, the air that has passed through the ears 7 of the return side belt 1b is discharged to the outside, but since this air contains dust and the like, it may pollute the surrounding environment. . Therefore, as shown in FIG. 3, a through hole 8 is provided in the side edge portion 6 and an exhaust duct 9 is installed subsequent to the through hole 8 so that the air passing through the lower surface of the ear portion 7 can pass through the through hole 8 and the exhaust duct 9. It may be guided to, then processed by a dust collector or the like (not shown), and then discharged to the outside. It should be noted that the position and number of the through holes 8 are arbitrary, and the side edge portions 6 may be provided as long as the floating of the ears 7 is ensured.
It is also possible to provide the through hole 8a on the lower surface side of the.

FIG. 4 is a side view of the air levitation type belt conveyor of the present invention. As shown in FIG. 4, in this conveyor, the belt 1 is held by the pulleys 10 and 10a, and the carrier-side belt 1a is located below the return-side belt 1b. It is necessary to carry out from the direction (not shown). Further, since the carrier-side belt 1a is wound upward by the pulley 10, the load X cannot be dropped from the end. Therefore, as shown in FIG. 4, the scraper 11 is arranged on the upper surface side of the carrier-side belt 1a extending from the carrier-side trough 2 in a flattened state, and the load X is moved to the side of the belt 1 by the scraper 11. It is configured to drop.

FIG. 5 shows another embodiment of the side edge portion 6. As shown in FIG. 5, a coating 12 is applied to the inner surface portion of the side edge portion 6. The coating 12 may be, for example, a polymer polyethylene that reduces frictional resistance with respect to the ears 7 of the return side belt 1b, or may improve abrasion resistance. In the former case, even if the ears 7 come into contact with the side edge portions 6, the resistance to belt running is reduced to prevent an increase in the operating cost of the conveyor. In the latter case, the ears 7 come into contact with the side edge portions 6. This prevents the side edge portion 6 and the ear portion 7 from being damaged.

Further, as shown in the drawing, the coating 12 is not limited to being applied to the entire inner surface of the side edge portion 6, and for example, the coating 12 may be applied only to the portion facing the lower surface of the ear portion 7. . Instead of the inner surface of the side edge portion 6, a similar coating may be applied to the surface of the ear portion 7 of the belt 1, and the same coating 12 may be applied to both the side edge portion 6 and the ear portion 7. Good. In this case, for example, it is possible to apply the wear resistant coating 12 to the ears 7 of the belt 1 and the coating 12 having a low friction coefficient to the side edge portions 6.

FIG. 6 shows another embodiment of the side edge portion 6. As shown in FIG. 6, rollers 13, 14, and 15 are arranged in the side edge portion 6 at the portions facing the ears 7, respectively. The roller 13 corresponds to when the ear portion 7 is lowered, the roller 14 corresponds to when the return side belt 1b moves in the width direction, and the roller 15 corresponds to when the ear portion 7 floats. As a result, even when the ears 7 come into contact with the side edge portion 6, the roller 13 or the like rotates and the side edge portion 6
It is possible to prevent the ear portion 7 from being damaged and to prevent the belt 1 from running. It is not limited to disposing the roller 13 and the like as shown in the figure, and for example, only the roller 13 or only the rollers 13 and 14 may be disposed. Further, the arrangement interval of the rollers 13 and the like in the longitudinal direction of the conveyor is arbitrary.

The shapes, combinations and the like of the respective constituent members shown in the above-mentioned embodiment are merely examples, and can be variously modified based on design requirements and the like without departing from the spirit of the present invention. For example, in the illustrated case, the return side belt 1b is configured to run in a substantially flat shape,
Instead of this, the return-side belt 1b may travel in a state of being curved in an upward convex shape or a downward convex shape. The bending of the return-side belt 1b can be realized by adjusting the internal pressure of the carrier-side trough 2 and other members.

[0024]

As described above, in the air levitation type belt conveyor according to the first aspect, the air used for levitation of the carrier side belt further acts to support the return side belt from below, and hence the return side belt. The trough is unnecessary. Moreover, since the return side belt travels above the carrier side belt and is supported by the side edge portion of the carrier side trough, the top side of the carrier side belt is blocked by the return side belt and the cover Since the air for floating the side plate and the return side belt is not required, the size of the entire conveyor can be reduced, and the operating cost and the manufacturing cost can be reduced. In addition,
In the return-side belt, the load-carrying side faces inward, so that scattering of dust or the like attached to the return-side belt can be prevented at the same time.

In the air levitation type belt conveyor according to the second aspect, since the side edge portion of the carrier side trough is formed in a U-shaped cross section so as to surround the ear portion of the return side belt, the return side belt moves in the width direction. The side edge of the U-shaped cross-section regulates the width of the return-side belt to prevent the closed space above the carrier-side belt from being opened accidentally, and functions as a cover. It can be surely demonstrated.

In the air levitation type belt conveyor according to the third aspect, at least one of the side edge portion, the surface facing the return side belt, and the ear portion of the belt is provided with a coating having a low wear resistance and a low friction coefficient. As a result, even if the ears of the return side belt come into contact with the side edges, it is possible to prevent damage to the side edges and the belt ears due to the presence of the coating, and to prevent resistance to belt running. it can.

In the air levitation type belt conveyor according to the fourth aspect, the roller is arranged at the side edge portion facing the return side belt, so that even if the return side belt contacts the side edge portion. It is possible to prevent the side edge portion and the belt ear portion from being damaged by the rotation of the roller and to prevent the belt from running.

In the air levitation type belt conveyor according to the fifth aspect, since the scraper for dropping the load from the belt is arranged, the load carried by the carrier side belt can be reliably and easily removed from the belt by the scraper. Can be detached.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of an air floating belt conveyor according to the present invention.

FIG. 2 is a perspective view showing the air floating belt conveyor shown in FIG.

FIG. 3 is a cross-sectional view showing another embodiment of the side edge portion.

4 is a side view of the air floating belt conveyor shown in FIG. 1. FIG.

FIG. 5 is a cross-sectional view showing another embodiment of the side edge portion.

FIG. 6 is a cross-sectional view showing another embodiment of the side edge portion.

FIG. 7 is a front sectional view showing a conventional air floating belt conveyor.

[Explanation of symbols]

X load 1 belt 1a Carrier side belt 1b Return side belt 2 Carrier side trough 3 ducts 4 air holes 6 side edge 7 ears 11 scrapers 12 coating 13, 14, 15 rollers

Claims (5)

[Claims] 1. An air-floating type belt conveyor that runs in a state where the carrier-side belt is levitated by supplying air between the carrier-side trough and the carrier-side belt, wherein the return-side belt comprises: An air levitation type belt conveyor, which is arranged so as to travel above a carrier side belt and supported by a side edge portion of the carrier side trough. 2. The air levitation type belt conveyor according to claim 1, wherein a side edge portion of the carrier side trough is formed in a U-shaped cross section so as to surround an ear portion of the return side belt. 3. The predetermined coating is applied to at least one of a side edge portion of the carrier side trough, a surface facing the return side belt, and an ear portion of the belt. Air floating type belt conveyor as described. 4. The air levitation type belt conveyor according to claim 1, wherein a roller is arranged at a side edge portion of the carrier side trough, which is opposed to the return side belt. 5. The air levitation type belt conveyor according to claim 1, further comprising a scraper for dropping the load carried by the carrier-side belt from above the belt.