JPH1179338A - Belt conveyor device - Google Patents

Abstract

(57) [Abstract] (with revisions) [Problem] Small and high-speed mass transportation is possible, and there is little noise, vibration and environmental pollution, running costs and equipment costs are low, and there is no dropping of transported goods. Provided is a belt conveyor device which can be bent and has less belt wear. SOLUTION: A carrier-side belt support trough 10 is formed of a cylindrical trough-shaped horizontal cylinder (upper cylinder P), and a return-side belt support trough 12 is arranged below an upper cylinder of the carrier-side belt support trough. , Return side belt 1b
A plurality of wrapping rollers 52 are arranged in a cylindrical shape, and a closed space is formed on the upper surface of the upper cylindrical body with a protective cover 11, and the compressed air after the belt floating action is discharged into the closed space. A compressed air pipe communicating with a pressurized air source and supplying compressed air to the injection hole is connected to a lower portion of the injection hole 22a formed at the lowermost portion of the upper cylinder, and an exhaust port 24 is provided inside the upper cylinder. (Concave side) Compressed air injection hole 28 on the side
a was drilled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor device, and more particularly, to a carrier-side belt supported by a cylindrical trough-shaped horizontal cylinder (upper-circle), which can be conveyed while floating with compressed air. A belt conveyor device that can transport a large amount of goods at a high speed over long distances with a belt having a relatively small belt width and that can change the direction in the horizontal or vertical direction at a low equipment cost. It is intended to be able to supply.

[0002]

2. Description of the Related Art In a conventional belt conveyor device, a belt for loading and transporting a conveyed product rolls on a central support roller and a pair of left and right side rollers arranged at a plurality of locations at substantially equal intervals in the belt traveling direction. The transported material is transferred while moving. Similarly, the return side belt is configured to roll and move on return rollers arranged at a plurality of locations.

[0003] However, in such a conventional belt conveyor device, a large amount of power is required to convey a large amount of conveyed objects over a long distance, and the rotational resistance and the number of revolutions of various rollers are required. There were the following problems due to restrictions. It was difficult to increase the speed due to the restriction of the belt conveyance speed. The work environment was degraded due to the noise generated by the rotation of the rollers. Labor was required to maintain a large number of rollers. There was vibration of the equipment due to the rotation of the rollers. Life is short due to wear due to belt rolling and sliding.

As an alternative to such a conventional belt conveyor device, the present applicant has disclosed in Japanese Patent Application Laid-Open
Japanese Patent Application Publication No. 150929/1995 (Japanese Patent Application No. 7-311132) has proposed an air-floating belt conveyor device of a vertical double cylindrical tube type. For example, as shown in FIG. 9, this belt conveyor device passes a carrier-side belt and a return-side belt through a pair of upper and lower cylindrical tubes extending in the belt traveling direction, and injects the cylindrical tube from the lowermost portion of the cylindrical tube. The belt is conveyed while being floated by the compressed air.

[0005]

However, in the above-described air-floating belt conveyor device using the vertical double cylindrical pipe system, the belt end is located at or near the center horizontal line of the cylindrical pipe, and the load M to be loaded is Since the length of the belt cannot be made larger than the end of the belt and the loading cross section cannot be increased, the transporting force is not large enough for a large-diameter cylindrical pipe.
Also, in the conventional air-floating belt conveyor device using the vertical double cylindrical tube method, when the cross section of the flat belt is bent into a circular state, the belt near the belt end tends to be in a straight line state. Because the outer edge of the portion slides in strong contact with the inner surface of the cylindrical tube, the trough index of the belt could not be reduced. Furthermore, in this type of air levitation type belt conveyor device, it is difficult to change the direction of the belt in the horizontal or vertical direction, and it is difficult to change the direction. And the location of the belt conveyor was limited. Further, at a curved portion in the horizontal direction, the traveling carrier-side belt is pulled by the traveling driving force of the head pulley and slides while the inner (concave side) side portion of the curved portion is strongly pressed against the inner surface of the cylindrical tube. There was a problem that belt wear due to movement was severe and the life of the belt was shortened.

[0006]

In order to solve the above-mentioned problems, the transport capacity is large and the direction can be changed to some extent in order to divide the diameter of the cylindrical tube. Reduced belt wear in curved areas,
In order to supply a belt conveyor device with low equipment cost, in the present invention, in the first invention, an endless belt and an injection hole of compressed air for floating the belt on the carrier side of the belt are provided in the belt traveling direction. An air-floating type belt conveyor device having a plurality of carrier-side belt bearing troughs and having at least one or more curved portions bent in a horizontal direction along a belt traveling direction, wherein the carrier-side belt bearing is provided. The troughs are formed in a cylindrical trough-shaped horizontal cylinder (upper cylinder) having an upper portion cut out so as to overhang the belt end, and are arranged in the belt traveling direction. A plurality of wrapping rollers arranged in a belt running direction below the upper cylindrical body of the belt support trough and wrapping the return side belt in a cylindrical shape are formed by a bell. A plurality of sets are arranged in the running direction, and the upper surface of the upper cylinder is provided with a protective cover for covering the upper cylinder to form a closed space, and the compressed air after the belt floating action is discharged into the closed space. An exhaust port is provided, and the carrier-side belt is supported on the inner surface of the lower part of the upper cylinder, and the lower part of the injection hole drilled at the lowermost part of the upper cylinder communicates with a compressed air source to be compressed into the injection hole. A compressed air pipe extending along a belt running direction for supplying air is connected, and the curved portion is inside the concave portion of the upper cylindrical body at the curved portion.
An injection hole for injecting compressed air was also formed in the side surface portion, and a compressed air pipe communicating with a compressed air source and supplying compressed air to the injection hole was connected.

According to a second aspect of the present invention, in the first aspect, the supporting rollers for supporting each of the overhanging belt ends are disposed at appropriate intervals in the belt running direction.

Further, in the third aspect of the present invention, the upper cylindrical body is formed in an elliptical shape having a long axis in the vertical direction in the horizontal curved portion which is curved in the horizontal direction along the belt traveling direction, and extends along the belt traveling direction. In the inclined curved portion curved in the inclined direction, the upper cylindrical body was formed in an elliptical shape having a short axis in the vertical direction.

According to the fourth aspect of the present invention, a belt cross-section in which a plurality of rollers for bending the belt cross-section into a U-shape are arranged in the same cross-section at at least one of an inlet portion and an outlet portion of the upper cylindrical body. Of the present invention.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, in the first aspect, there is provided an endless belt and a carrier side provided with a plurality of compressed air injection holes for floating the belt on the carrier side in the belt traveling direction. An air levitation type belt conveyor device having a belt supporting trough and having at least one or more curved portions bent in the horizontal direction along the belt traveling direction, wherein the carrier-side belt supporting trough has a belt end portion. It is formed of a cylindrical trough-shaped horizontal cylinder (upper cylinder) cut off at the top so as to overhang and is arranged in the belt running direction, and the return-side belt support trough is located above the carrier-side belt support trough. A plurality of sets of wrapping rollers arranged in the belt running direction are arranged below the cylindrical body in the belt running direction and wrap the return side belt in a cylindrical shape. Ri, the upper surface portion of said upper cylindrical body closed space is formed by a protective cover covering said upper cylindrical body,
An exhaust port for discharging the compressed air after the belt floating action is provided in the closed space, and the carrier-side belt is supported on an inner surface of a lower portion of the upper cylinder, and the injection hole formed in a lowermost portion of the upper cylinder. A compressed air pipe extending in the belt running direction that communicates with a compressed air source and supplies compressed air to the injection hole is connected to a lower part of the upper part of the upper cylindrical body of the curved part. (Concave side) An injection hole for injecting compressed air is also formed in the side surface, and a compressed air pipe that communicates with the compressed air source and supplies compressed air to the injection hole is connected. The running belt, which wraps the transported material in a state almost full in the belt thus moved, is smoothly moved while air floating. In the upper cylindrical body, both ends of the traveling belt are overhanged from the upper cylindrical body, so that the abrasion phenomenon due to the sliding operation of the belt end to the upper cylindrical body surface is eliminated, and the belt is strongly pressed. Compressed air is injected into the inner (concave side) side of the location to reduce belt sliding wear and extend the life of the belt.

In the second aspect of the present invention, the supporting rollers for supporting each of the overhanging belt ends are disposed at appropriate intervals in the belt running direction. The occurrence of a local gap with the outer surface of the belt is suppressed, and the belt can be evenly levitated over the entire inner surface of the upper cylinder, so that a smooth and efficient levitation operation is ensured.

According to the third aspect of the present invention, the upper cylinder is formed in an elliptical shape having a long axis in the vertical direction in the horizontal curved portion which is curved in the horizontal direction along the belt traveling direction, and extends along the belt traveling direction. Since the upper cylindrical body is formed into an elliptical shape having a short axis in the vertical direction in the inclined bending section that bends in the inclined direction, the bending action of the belt in the horizontal direction or the inclined direction can be smoothly and smoothly promoted.

Further, in the fourth invention, at least one of the inlet portion and the outlet portion of the upper cylinder has a U-shaped cross section of the belt.
A belt guiding device having a belt section in which a plurality of rollers that bend in a V-shape are arranged in the same section is provided, so that the belt edge is guided into the cylindrical pipe without causing sliding wear, so that the belt edge is Part wear can be avoided.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 8 relate to an embodiment of the present invention. FIG. 1 is an overall configuration diagram of a belt conveyor device (an upper half is an overall side view, a lower half is an overall plan view), and FIG.
FIG. 3 is a cross-sectional front view of a trough forming device, FIG. 5 is a cross-sectional front view of a belt guiding device, and FIG. 6 is a cross-sectional front view of a belt conveyor device showing another embodiment. FIG. 7 is a front view of the bending guide device, FIG. 7 is a perspective view of the bending guide device, and FIG. 8 is a front view of the cylinder forming device.

As shown in FIGS. 1 and 2, the belt conveyor device 100 is structured such that an endless smooth belt 1 is wound between a head pulley 2 and a tail pulley 3 and can move endlessly. As shown in FIG. 2, a pair of upper and lower belt support troughs (a carrier-side belt support trough 10 and a return-side belt support trough 12) are provided at an intermediate portion between the pulley 2 and the tail pulley 3.

The carrier-side belt support trough 10 is manufactured by cutting a resin pipe or a steel pipe made of vinyl chloride or the like by partially cutting the pipe in the axial direction, and has a cylindrical section having a cylindrical trough-like shape (an upper part lacking a circle). A carrier-side belt support trough (hereinafter, referred to as a carrier-side trough) 10 formed of (upper cylinder P) and supporting the carrier-side belt 1a corresponds to a lower inner surface of the upper cylinder P, and a cutout range of the upper cylinder P. Is 30 to 60 in angle
°.

A return side belt support trough for supporting the return side belt 1b (hereinafter referred to as a return side trough).
A plurality 12 is disposed below the upper cylindrical body P, is housed in a box-shaped casing 50a having a rectangular cross section, and rounds and wraps the return side belt 1b into a cylindrical shape (in the example of FIG. 2,
A belt enveloping device 50 including three wrapping rollers 52, 52, 52.

That is, as shown in FIG. 2, the belt enveloping device 50 includes a rectangular casing 50a connected below the air duct 22 with the return side belt 1b having a transport surface as an inner side and having both end portions. Are overlapped with each other and are wrapped in a cylindrical shape so that a plurality of
A plurality of wrapping rollers 52, 52, 52 are arranged in a polygonal shape, and a plurality of sets are arranged at regular intervals in the belt running direction, and this is usually called a pipe conveyor.

As shown in FIG. 2, the upper cylindrical body P is provided with horizontal flanges 10a at both ends of a notched opening, and is arranged in the belt running direction with the upper part being open. A sealing cover 11 for covering the opening is attached to the flange by bolt-nut coupling to form a closed space.

In the center of the lowermost part of the upper cylinder P, injection holes 22a for compressed air are formed at regular intervals along the running of the belt, and compressed air supplied from an air duct 22 provided at the lower part of the cylinder. It is configured to be able to inject air, so that the carrier-side belt 1a floats.

At a curved portion in the horizontal direction along the belt running direction (for example, a central portion shown in the plan view of the lower half of FIG. 1), the carrier side belt 1a receives the pulling force of the rotational driving of the head pulley 2. Therefore, the belt travels in the belt running direction while being strongly pressed against the inner side surface of the upper cylindrical body P inside the concave portion (concave side), so that the belt is greatly worn due to sliding. An injection hole 28a for injecting compressed air is also formed in the inside (concave side) of the curved portion of P. Then, as shown in FIG. 2, an air duct 28 for supplying compressed air to the injection hole 28a and a connection pipe 29 provided with a control valve 29a on the way are connected to the air supply pipe 20.

The support 42, the stand 46, and the handrail 48 fixed to the side wall of the casing 50a are laid on the side surfaces of the upper tubular body P and the belt enclosing device 50 which are vertically connected as described above.

The air after the floating action in the upper cylindrical body P is exhausted from an exhaust pipe 24 attached to a required portion of the closed cover 11.

At one end of the upper cylindrical body P on the tail pulley side,
An inlet 4 for the transported object M is provided, and end covers 7 and 8 for covering the tail pulley 3 and the head pulley 2 are provided. A chute 9 for discharging the transported object M is connected to a lower portion of the end cover 8. You.

A bending guide device 80 shown in FIGS. 6 and 7 is provided at the entrance of the upper cylinder between the tail pulley 3 and the upper cylinder P. In order to prevent a wear phenomenon in which the belt end of the carrier-side belt 1a having a flat cross-sectional shape that has passed through the tail pulley 3 slides on the inner wall of the upper cylindrical body entrance, the bending guide device 80 adjusts the cross-section of the belt 1a in advance. The carrier-side belt 1
a, a plurality of pressing rollers 81, 82 for pressing a from outside;
83, 84 and 85 were arranged in the same cross section. Also, at the outlet of the upper cylinder P, when the belt 1 that has exited the upper cylinder P is guided to the head pulley 2, the cross section of the belt 1 changes from a cylindrical shape to a horizontal flat shape. In order to prevent both ends of the upper cylindrical body P from sliding on the inner surface of the upper cylindrical body P to cause abrasion, that is, to prevent a wear phenomenon similar to that at the upper cylindrical body inlet part, the bending guide device 80 is disposed. Is desirable.

On the other hand, the belt conveyor device 10 shown in FIG.
0A shows another embodiment of the present invention, which is different from the belt conveyor device 100 of FIGS.
That is, the trough forming device 60 is disposed between the belt envelop device 50 and the belt envelop device 50. As shown in FIG. 4, the trough forming device 60 curves the flat belt 1 (actually, the return side belt 1b) into a bowl-shaped mountain-shaped (inverted U-shaped) cross section, and smoothly moves the belt to the belt envelope device 50. Specifically, a pair of upper and lower pressing rollers 61, 62 at the center of the belt cross section and a pair of upper and lower scissoring rollers 63, 63, 64, 64 for holding the belt end at an angle.
It is composed of

FIG. 5 shows a belt guide device 70, which is similar to a flat return-side belt 1b or a return-side belt 1b previously curved in an inverted U-shape by the trough forming device 60 described above. Cylindrical pressing rollers 71, 7 for holding down the belt end.
4 and a pressing roller 727 having a belt contact rolling surface curved.
4 are arranged inside each so as to surround the return side belt 1b. The return side belt 1b that has passed through the belt guide device 70 is smoothly introduced into the belt envelope device 50 disposed after the belt guide device 70. The belt guide device 70 is disposed and used between the head pulley 2 and the belt enveloping device 50. By using the above-described trough forming device between the belt guide device 70 and the head pulley 2, Further, the return side belt can be easily and smoothly formed into a cylindrical shape.

The operation of the thus configured belt conveyor device 100 shown in FIG. 1 and the belt conveyor device 100A shown in FIG. 3 will be described. The transported material M is supplied from the input port 4 on the side of the tail pulley 3 onto the carrier side belt 1a on the carrier side trough 10, and is transported by a belt driving device (not shown) and the carrier side belt 1a driven by the head pulley 2 and the head. It is discharged from the pulley-side chute 9. This belt conveyor device 1
00, or during operation of the belt conveyor device 100A, the carrier-side belt 1a moves while slightly floating due to a film layer formed by compressed air formed between the carrier-side belt 1 and the carrier-side trough 10 (upper cylinder P). Wear with the side trough 10 is greatly reduced as compared with the conventional model, and power consumption is reduced.

On the other hand, the belt 1 inverted by the head pulley 2, that is, the return side belt 1b, enters the trough forming device 60 and the belt guide device 70, and after being formed into an inverted U shape or a shape approximate to a cylinder, respectively. Belt guide device 5
Tail pulley 3 with cylindrical shape with transport surface inside at 0
The transported goods are returned to the supply line, the tail pulley 3 is reversed, and the return side belt 1b becomes the carrier side belt 1a. Reach mouth 4.

Further, the belt conveyor device 1, 1 of the present invention
A is a horizontal curved portion in which the return side belt 1b is wrapped in a cylindrical shape and conveyed, so that it is easy to change the direction in the horizontal or vertical direction, and the carrier side belt 1a is also curved in the horizontal direction along the belt running direction. The upper cylinder is formed in an elliptical shape with the major axis in the vertical direction, and the upper cylinder is formed in the elliptical shape with the minor axis in the vertical direction in the inclined curved portion that curves in the inclined direction along the belt running direction. By doing so, the direction can be changed more easily without any trouble.

Further, the belt conveyor device 1 of the present invention,
1A transports the return side belt 1b as it is without using a reversing device without reversing it, so that the installation length of the reversing device becomes unnecessary, and the belt conveyor device can be shortened to the machine length.

In the present invention, a cylindrical trough-like (upper-circle) horizontal tubular body manufactured by cutting a resin pipe or a steel pipe in the upper part in the axial direction is used for the belt-supporting trough of the carrier-side belt. 2. Compared to a belt conveyor device having a belt support trough in which two cylindrical tubes are arranged vertically, the weight is reduced, and the diameter of a steel tube to which an operator has difficulty entering and leaving is 500 mm.
mm or smaller, the compressed air inlet 22
The drilling operation of the holes a and 32a is extremely easy as compared with the case of using a cylindrical tube.

Also, compared to the vertical double cylindrical tube type,
Because the belt has been wrapped to a nearly perfect circle and the area of the loading section has been increased, the transport capacity is large in comparison with the diameter of the cylindrical pipe (the transport capacity is larger than that of the vertical double cylindrical pipe type with the same diameter). And the end of the belt does not come into contact with the upper and lower cylinders P, so there is less fear of wear, and a thicker belt with a smaller trough index can be adopted.
Even a large lump of goods can be transported safely, and the curvature of the horizontal curve can be made smaller than that of the same transportation capacity, so that the applicable range is expanded.

[0034]

According to the belt conveyor apparatus of the present invention described above, a large amount of high-speed transfer can be performed over a long distance, and the closed structure eliminates noise and contamination of the working environment due to falling down. As a result, maintenance and management are facilitated, maintenance is improved, and running costs and initial costs can be significantly reduced by saving power consumption. In particular, in the present invention, a horizontal cylindrical tube is skillfully utilized, and the upper end is cut off, the belt end is overhanged from the cut-out cylindrical tube, and the lower inner surface of the cylindrical tube is transported by air levitation as a bearing trough of a carrier-side belt. Therefore, the ratio of the conveyed material to the cylindrical cross section is increased to improve the transport capacity, and the wear of the belt is remarkably reduced, and a belt envelope device is provided on the return side, and a trough forming device and a belt guiding device are provided. By providing the belt, the belt is smoothly formed into a desired cylindrical shape, so that deterioration of the belt can be reduced and life can be prolonged. Less and the PIC can be shorter.

Therefore, the maintainability is improved,
It can operate safely and stably for a long time. In addition, since the belt is passed through the inside of the cylindrical pipe and the return belt is returned in a cylindrical shape with the ends overlapped, there is no dropping of transported goods, so the working environment is clean and good, and there is no loss of transported goods. is there. Furthermore, since the bending guide device is disposed at the entrance and / or the exit of the cylindrical tube, the belt end is prevented from sliding on the inner wall of the cylindrical tube, the belt is prevented from being deteriorated due to abrasion, and the life is extended. Can be.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a belt conveyor device according to an embodiment of the present invention.

FIG. 2 is a transverse sectional view taken along line AA of FIG.

FIG. 3 is a schematic overall side view of a belt conveyor device according to another embodiment of the present invention.

FIG. 4 is a sectional front view of the trough forming apparatus according to the embodiment of the present invention.

FIG. 5 is a sectional front view of the belt guide device according to the embodiment of the present invention.

FIG. 6 is a front view of the bending guide device according to the embodiment of the present invention.

FIG. 7 is a perspective view of a bending guide device according to an embodiment of the present invention.

FIG. 8 is a front view of the cylinder forming apparatus according to the embodiment of the present invention.

FIG. 9 is a longitudinal sectional view of a conventional air levitation type belt conveyor device.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 belt 1 a carrier side belt 1 b return side belt 2 head pulley 3 tail pulley 4 input port 7 end cover 8 end cover 9 chute 10 carrier side belt support trough (carrier side trough) 11 closed cover 12 return side belt support trough (return side trough) 13) Sealing cover 20 Air supply pipe 22 Air duct 22a Inlet 24 Exhaust pipe 26 End support roller 28 Air duct 28a Injection hole 29 Connecting pipe 29a Control valve 30 Air supply pipe 32 Air duct 32a Inlet 34 Exhaust pipe 40 Blower 42 Support 44 Inspection corridor 46 Stand 48 Handrail 50 Belt wrapping device 50a Casing 52 Wrapping roller 60 Trough forming device 61, 62 Holding roller 63, 64 Scissoring roller 70 Belt guiding device 71, 72, 73, 74 Holding Roller 80 Bending guide device 81, 82, 83, 84, 85 Holding roller 81a, 85a Inner holding roller 86 Support 90 Cylindrical forming device 91, 92, 93 Holding roller 100 Belt conveyor device 100A Belt conveyor device M Transported material P Upper cylinder body

Claims (4)

[Claims] An endless belt and a carrier-side belt support trough provided with a plurality of compressed air injection holes for floating the belt on the carrier side of the belt in the belt traveling direction are provided along the belt traveling direction. An air-floating belt conveyor device having at least one or more curved portions bent in the horizontal direction, wherein the carrier-side belt-supporting trough has a cylindrical trough shape in which an upper end is cut out so that a belt end is overhanged. The return-side belt support trough is formed of a horizontal cylinder (upper cylinder) and is arranged in the belt traveling direction, and the return-side belt support trough is arranged below the upper cylinder of the carrier-side belt support trough in the belt travel direction. A plurality of sets of wrapping rollers for wrapping the side belt in a cylindrical shape are arranged in a plurality in the belt running direction, and an upper surface of the upper cylinder covers the upper cylinder. A closed space is formed with a protective cover which is provided with an exhaust port for discharging the compressed air after the belt floating action is provided in the closed space, and the carrier side belt is supported on the lower inner surface of the upper cylindrical body, and A compressed air pipe is connected to a lower portion of the injection hole formed at the lowermost portion of the cylindrical body and communicates with a pressure air source and extends along a belt running direction that supplies compressed air to the injection hole. In addition, an injection hole for injecting compressed air is also formed in an inner (concave side) side portion of the upper cylindrical body at the curved portion, and a compressed air pipe which communicates with a compressed air source and supplies compressed air to the injection hole is provided. A belt conveyor device, wherein the belt conveyor device is connected. 2. The belt conveyor device according to claim 1, wherein support rollers for supporting each of the overhanging belt ends are disposed at appropriate intervals in the belt running direction. 3. In a horizontal curved portion which is curved in the horizontal direction along the belt running direction, the upper cylindrical body is formed in an elliptical shape having a long axis in the vertical direction, and is inclined in the inclined direction along the belt running direction. 3. The belt conveyor device according to claim 1, wherein the upper cylindrical body is formed in an elliptical shape having a short axis in a vertical direction in the curved portion. 4. A belt cross-section bending guide device in which a plurality of rollers for bending a belt cross-section into a U-shape are arranged in the same cross section at at least one of an inlet portion and an outlet portion of an upper cylindrical body. The belt conveyor device according to claim 1, wherein