JPH1191921A - Belt conveyer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air floating type belt conveyer device which can carry out a curve running and a large amount transporting. SOLUTION: An upper and lower surfaces reversing device of a return side belt 1b at the immediately after the reversing by the drive pulley at the edge end of a conveyer device, and at the immediatly before the reversing by the tail pulley at the edge end, is provided. Belt supporting troughs 10 and 12 are formed of a pair of upper and lower resin pipes, or holizontal pipes consisting of a steel pipe cylindrical pipe or oval pipe, a carrier side belt 1a is supported to the lower inner surface of an upper side holizontal pipe P, the return side belt 1b is supported to the lower inner surface of a lower side holizontal pipe Q, a compressed air piping communicating with a pressure air source is connected to the lower parts of filling holes 28a and 38a formed at the lowermost parts of the holizontal pipes, an exhaust port 24 of the compressed air after the belt floating operation is provided to the holizontal pipes, compressed air filling holes 22a and 32a are formed to the inner side of the upper side holizontal pipe P, and at the inner side of the lower holizontal pipe Q, the filling holes 22a and 32a are communicated to the pressure air source, and the compressed air piping is connected to the filling hole 22a and 32a.

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 pneumatic belt capable of supporting a carrier side belt and a return side belt with a pair of upper and lower horizontal tubes, respectively, and carrying the belt while floating with compressed air. This is a belt conveyor device that has a curved section that is arbitrarily curved in the left and right direction at a desired location, and is capable of curved and capable of traveling a large amount of goods at high speed over long distances. It is intended to be able to supply a belt conveyor device which can be transported to China at low equipment cost.

[0002]

2. Description of the Related Art In a conventional carrier type flat belt conveyor device, a belt for loading and transporting a conveyed product is provided 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 conveyed material is transferred while rolling and moving. Similarly, the return side belt is configured to roll and move on return rollers arranged at a plurality of locations. Then, a cross beam-shaped pedestal (conveyor frame) that supports these support rollers, side rollers, and return rollers at appropriate intervals in the belt running direction is supported on the ground via a plurality of pillars. I have.

[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 various types of rollers are required. There were the following problems due to restrictions on rotational resistance and rotational speed. 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. Since the load side of the belt on the return side is on the lower side, some of the load attached to the load side may fall off during traveling on the return side and fall off, polluting the inside of the equipment and the surrounding environment. there were. In the carrier-type flat belt conveyor, a certain amount of tension must be applied to the belt on the carrier side in order to eliminate slack between two adjacent rollers in the belt running direction. Because it was close to the inside, the curvature was limited and it was not suitable for running. Further, in the carrier type flat belt conveyor, since the belt on the return side is usually transported in a flat state in a horizontal state, there is a problem that it is difficult to give a curvature.

[0004]

[Means for Solving the Problems] By solving the above problems,
In order to supply a belt conveyor device capable of bending and having low equipment cost, in the present invention, in the first invention, an endless belt and compressed air for floating the belt on both the carrier side and the return side of the belt are provided. And a belt bearing trough having a plurality of injection holes in the belt running direction, and having at least one curved portion bent horizontally in the belt running direction. A belt reversing device for reversing the upper and lower surfaces of the return belt immediately after being reversed by the driving pulley at the edge of the belt conveyor device and the return belt just before being reversed by the tail pulley at the edge of the belt conveyor device. And the belt support trough is a horizontal pipe formed of a pair of upper and lower resin pipes or a cylindrical pipe or an elliptic pipe formed of a steel pipe, respectively. And the carrier-side belt is supported on the lower inner surface of the upper horizontal tube of the pair of horizontal tubes, and the return-side belt is supported on the lower inner surface of the lower horizontal tube of the pair of horizontal tubes, A compressed air pipe is connected to a lower portion of the injection hole formed at the lowermost portion of each of the horizontal pipes and extends along a belt running direction that communicates with a pressure air source and supplies compressed air to the injection hole. An exhaust port for discharging the compressed air after the belt floating action is provided in the horizontal tube, and at the curved portion, an inner (concave side) side portion of the upper horizontal tube and an inner side (concave side) of the lower horizontal tube at the curved portion. ) An injection hole for injecting compressed air was formed in both side surfaces, 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, when an elliptical tube is used as the pair of upper and lower horizontal tubes, the ratio of the long side to the short side of the steel elliptic tube is 1.5 or less. In the resin tube elliptic tube, the length ratio of the long side and the short side of the resin tube elliptic tube is set to 2.0 or less, and the radius of curvature at the curved portion of the pair of upper and lower horizontal tubes is 35 times the pipe diameter in the steel tube cylindrical tube. As described above, in the case of a resin tube cylindrical tube, the tube diameter is 30 times or more the tube diameter, in the case of a steel tube elliptic tube, the tube average diameter is 25 times or more, and in the case of a resin tube elliptic tube, the tube average diameter is 20 times or more.

In a third aspect of the present invention, the belt reversing device according to the first or second aspect of the present invention provides a belt cross-section at at least one of an inlet portion and an outlet portion of the upper horizontal pipe and the lower horizontal pipe. A bending guide device having a belt section in which a plurality of rollers to be bent in a U-shape are arranged in the same section is provided.

In the fourth invention, a horizontal scissoring roller provided on the pulley side, a cylindrical supporting roller provided on the lower cylindrical tube side, and the same cross section provided at an intermediate portion between the two rollers. A plurality of rounding rollers arranged in a cylindrical shape, or a rounding roller composed of a pair of upper and lower inclined inner pressing rollers that support both ends of a bent belt and both ends of a bent belt from the inside, respectively, or It is formed by an inclined roller that projects at a plurality of locations separated by a predetermined distance in the axial direction from the inclined support and that projects and changes the projection angle to abut and roll on the back surface of the belt.

According to a fifth aspect of the present invention, in the first to third aspects, the upper and lower upper and lower rolls abut on the upper and lower surfaces of the cross-section central portion of the return side belt between the belt reversing device and the lower cylindrical tube. There is provided a trough forming device which comprises a pair of pressing rollers and a pair of upper and lower scissors rollers which roll while sandwiching both ends of the belt of the return belt at an angle.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, there is provided a belt support trough provided with an endless belt and a plurality of compressed air injection holes for floating the belt on both a carrier side and a return side of the belt in the belt running direction. A belt conveyor device of an air levitation type having at least one curved portion bent in the horizontal direction along the belt traveling direction, immediately after being inverted by a driving pulley at an edge of the belt conveyor device. And a belt reversing device for reversing the upper and lower surfaces of the return belt just before being reversed by the tail pulley at the edge of the belt conveyor device, and the belt support trough is a pair of upper and lower resin pipes. Or a horizontal pipe formed of a cylindrical pipe or an elliptical pipe formed of a steel pipe, and the carrier-side belt is provided with the pair of horizontal pipes. And a return side belt is supported on a lower inner surface of a lower horizontal tube of the pair of horizontal tubes, and is formed at a lowermost portion of each of the horizontal tubes. A compressed air pipe connected to a pressure air source and supplying compressed air to the injection hole and extending along a belt running direction is connected to a lower portion of the injection hole, and the horizontal tube discharges the compressed air after the belt floating action. Provide an exhaust port,
In the curved portion, an injection hole for injecting compressed air is formed in both the inner (concave side) side portion of the upper horizontal tube and the inner (concave side) side portion of the lower horizontal tube at the curved portion,
A configuration in which a compressed air pipe communicating with a compressed air source and supplying compressed air to the injection hole is connected, a curved portion having an arbitrary curvature can be provided in a necessary portion within a range that does not cause trouble, and a curved portion can be provided. To reduce belt sliding wear in
In addition, by moving the running belt while floating the air, it is possible to convey the goods continuously at high speed in a closed structure.

The belt on the return side is reversed by the belt reversing device and then enveloped in a substantially cylindrical shape, and furthermore, the belt overlapped portion is located at the upper side, so that the return side belt is completely removed without any falling of the transported goods. Is transported. In addition, since the belt whose cross section is bent in a U-shape on the carrier side in the upper horizontal pipe passes through the lower horizontal pipe while being bent in the U-shape on the return side as well, compared with a belt that is not inverted on the return side. The wear phenomenon due to the sliding operation on the inner surface of the horizontal pipe at the end of the belt is reduced, and the life of the belt is extended.

According to the second aspect of the present invention, a condition for adopting a pair of upper and lower horizontal pipes having a curved portion is grasped, so that there is no problem in bending of the horizontal pipes and the belt is damaged during running. The minimum radius of curvature of a cylindrical tube or an elliptical tube with a smooth and curved belt deformed without any difficulty in actual operation was presented.

According to the third aspect of the present invention, a belt cross-section bending guide device is provided in which a plurality of rollers for bending the belt cross section into a U-shape are arranged in the same cross section, so that the belt edge slides. Since the belt is guided into the cylindrical tube without abrasion, abrasion of the belt edge can be avoided.

[0013] In the fourth invention, the belt reversing device is provided with a horizontal scissor roller provided on the pulley side, a cylindrical support roller provided on the lower cylindrical tube side, and an intermediate portion between the two rollers. It is composed of a plurality of rounding rollers arranged in a cylindrical shape on the same cross section, or a pair of upper and lower inclined inner pressing rollers for supporting both ends of a bent belt and both ends of a bent belt from the inside, respectively. Rolling roller,
Alternatively, the belt can be easily and easily inverted because the projection is formed by changing the projection angle sequentially at a plurality of locations separated by a fixed distance in the axial direction from the inclined support and projecting from the inclined support to abut and roll on the back surface of the belt.

Further, in the fifth invention, the trough forming device is disposed between the belt reversing device and the lower cylindrical tube, and the U-shaped along the inner surface of the cylindrical tube for guiding the belt after reversing in advance. Since the belt is formed in a cross section, the belt is smoothly introduced into the cylindrical pipe without contacting the edge portion with the inner surface of the cylindrical pipe, so that unnecessary wear phenomenon is prevented.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 14 relate to an embodiment of the present invention. FIG. 1 is an overall configuration diagram of a belt conveyor device (first embodiment), in which an upper half shows a side view and a lower half shows a plan view. 2 is a longitudinal sectional view taken along line AA of FIG. 1, FIG. 3 is a schematic side view of the belt reversing device, FIG. 4 is a schematic perspective view of the belt reversing device, and FIG. 5 is a belt reversing device showing another embodiment. FIG. 6 is a schematic perspective view, FIG. 6 is a cross-sectional view of a main part of an inclined roller unit of the belt reversing apparatus of FIG. 5, FIG. 7 is a cross-sectional view of a main part of a belt reversing apparatus showing another embodiment, and FIG. FIG. 9 is a longitudinal sectional view of a trough forming device, FIG. 10 is a front view of a bending guide device, FIG. 11 is a perspective view of the bending guide device, and FIG. 12 is another view of the belt conveyor device (second embodiment). 13 is an overall plan view of a belt conveyor device (third embodiment) showing an embodiment, FIG. 13 is a longitudinal sectional view taken along line BB of FIG. 12, and FIG. 14 is a curved portion (curved portion) of a horizontal pipe showing another embodiment. FIG.

As shown in FIG. 1, the belt conveyor device 100 of the present invention has a structure in which an air-floating belt conveyor 200 and a reversing device 50 are connected at required places. In this case, an arbitrary number of necessary curved portions are provided at the required curved portions to be curved, thereby transporting the transported object while bending the transport line. As will be described later, the trough forming device 60 and the bending guide device 80 are arranged at necessary places so that the transported object can be efficiently transported without any trouble.

Hereinafter, the details will be described. Figure 1
As shown in FIG. 2, an air-floating belt conveyor 200 in the belt conveyor device 100 is configured such that an endless smooth belt 1 is wound between a head pulley 2 and a tail pulley 3 and can move endlessly. At the intermediate portion between the head pulley 2 and the tail pulley 3, 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 1).
2) is formed of a cylindrical tube made of a resin tube or a steel tube of vinyl chloride or the like, or a horizontal tube made of an elliptic tube made of a resin tube or a steel tube. That is, the horizontal pipe of the present invention is any one of a steel pipe cylindrical pipe, a steel pipe elliptical pipe, a resin pipe cylindrical pipe, and a resin pipe elliptic pipe, or a combination thereof.

If the elliptical tube is too flat in the horizontal or vertical direction, it may hinder the transportation of the goods at the bend,
Since there is a possibility that structural defects such as crushing or cracking may occur in the pipe during bending at the time of forming a curved portion, the flatness, that is, the ratio of the major axis to the minor axis of the ellipse (with respect to the minor axis) is as follows. Restrictions on the ratio of major axis). Flatness (ratio of major and minor diameters) In the case of a steel pipe elliptic pipe, the ratio of the long and short sides of the steel pipe elliptic pipe is 1.5.
The following is assumed. In the resin tube elliptic tube, the ratio of the long and short sides of the resin tube elliptic tube is set to 2.0 or less. The radius of curvature R is at least 35 times the pipe diameter for a steel pipe circular pipe, at least 30 times the pipe diameter for a resin pipe cylindrical pipe, at least 25 m times the pipe average diameter for a steel pipe elliptical pipe, and at the average pipe diameter for a resin pipe elliptic pipe. 20 times or more.

As the upper horizontal pipe P and the lower horizontal pipe Q, any of a steel pipe cylindrical pipe, a steel pipe elliptic pipe, a resin pipe cylindrical pipe, and a resin pipe elliptical pipe may be used. Carrier side belt 1a
A carrier-side belt support trough (hereinafter, referred to as a carrier-side trough) 10 that supports the return-side belt 1b and a return-side belt support trough (hereinafter, referred to as a return-side trough) 12 that supports the return-side belt 1b.
Corresponds to the lower inner surface of the lower horizontal pipe Q.

The upper horizontal pipe P and the lower horizontal pipe Q are connected by an air duct 22 arranged along the belt running direction, and are formed at the lowermost part of the upper horizontal pipe P at substantially equal intervals in the belt running direction. Compressed air supplied via the air supply pipe 20 and the air duct 22 through the provided injection hole 22a enters the upper horizontal pipe P and floats the carrier side belt 1a. The air after the floating action is discharged from the exhaust pipe 24. In the same manner as described above, the lower horizontal pipe Q is also provided with an air duct 32 below in the belt running direction, and the air supply pipe 30, the air duct 30, and the injection hole 32a are provided.
Compressed air is supplied to the lower horizontal pipe Q through the lower side to move the return side belt 1b while floating. Then, the air after the floating action is discharged from the exhaust pipe 34 provided on the oblique side surface of the lower horizontal pipe Q.

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 and the return side belt 1b are The belt travels in the belt running direction while being strongly pressed by the inner (concave side) side portion of the upper horizontal tube P and the inner (concave side) side portion of the lower horizontal tube Q at the curved portion to receive the pulling force of the rotational drive. Therefore, belt wear due to sliding is intense.
Injection holes 28a and 38a for injecting compressed air are also formed in the inner (concave side) side of the curved portion of the lower horizontal pipe Q, respectively. As shown in FIG. 2, in the upper horizontal pipe P, an air duct 28 for supplying compressed air to the injection hole 28a and a connection pipe 29 provided with a control valve 29a in the middle are connected to the air supply pipe 20, and the lower horizontal pipe P is connected to the lower horizontal pipe P. In the pipe Q, an air duct 38 for supplying compressed air to the injection hole 38a and a connection pipe 39 provided with a control valve 39a on the way are connected to the air supply pipe 30.

At one end of the upper horizontal pipe P on the side of the tail pulley, an inlet 4 for the goods M is provided, and end covers 7 and 8 for covering the tail pulley 3 and the head pulley 2 are provided, respectively. A chute 9 for discharging the transported material M is connected to a lower portion of the chute 8. As shown in FIG. 2, a plurality of column bases 40 are fixed to the lower horizontal pipe Q in the belt running direction.
An inspection corridor 44, a stand 46, a handrail 48 and the like are provided via the support 42.

Belt reversing devices 50 are provided between the head pulley 2 and the lower horizontal tube Q, and between the tail pulley 3 and the lower horizontal tube Q. The belt reversing device 50
As shown in FIGS. 3 to 5, a horizontal scissor roller 52 is provided on one pulley side, and a cylindrical support roller 52a is provided on the other lower horizontal tube side.
A rounding roller 5 is provided at an intermediate portion between the
4 (FIG. 3), a cylindrical holding roller 59 (FIG. 4), or an inclined roller 58 (FIG. 5). That is, the horizontal scissoring roller 52 horizontally sandwiches a flat belt from above and below, and the cylindrical supporting roller 52a has a plurality of rollers arranged in a semicircular shape, and the cross section of the roller leaving the lower horizontal pipe Q is half. Circular bent return belt 1b
Is maintained as it is, or the return belt 1b is formed into a semicircular shape immediately before entering the lower horizontal pipe Q.

On the other hand, the rounding roller 54 is a roller for rounding the return belt 1b into a cylindrical shape.
) Rollers are arranged in the same cross section in a polygonal shape. Further, as shown in FIG. 7, the cylindrical holding roller 59 is
Vertical press roller 59a and bent return belt 1b
And a pair of upper and lower inclined inner pressing rollers 59b, 59b that support both ends from the inside. Furthermore, as shown in FIGS. 5 and 6, the inclined roller 58
6 (generally, a pipe is used), it is configured to protrude at a plurality of locations separated by a predetermined distance in the axial direction while sequentially changing the projection angle, and to abut and roll on the back surface of the belt. The belt reversing devices 50 (shown in FIG. 3), 50A (shown in FIG. 4), and 50B (shown in FIG. 5) configured as described above are all from the left side to the right side of the drawing or the right side of the drawing. When the return belt 1b passes from the left to the right, the front and back surfaces of the return belt 1b are turned upside down.

On the other hand, the belt conveyor device 10 shown in FIG.
0A is the second embodiment of the present invention (corresponding to the third invention)
And the belt conveyor device 100 of FIG.
The difference from the embodiment is that a trough forming device 60 is disposed between the belt reversing device 50 and the lower horizontal pipe Q.

As shown in FIG. 8 and FIG. 9, the trough forming device 60 curves the flat belt 1 (actually, the return belt 1b) passing through the belt reversing device 50 into a U-shaped cross section. For smooth introduction into the lower horizontal pipe Q, the return side belt 1b near the entrance of the lower horizontal pipe Q is flattened due to the influence of the reversing action of the belt reversing device 50, and the belt end is lowered horizontally. In order to prevent the inner wall of the tube from being strongly rubbed and worn, the belt is installed in a U-shaped cross section. Specifically, a pair of upper and lower pressing rollers 61 and 62 at the center of the belt cross section and a pair of upper and lower scissoring rollers 6 for holding the belt end portion at an angle.
3, 63 and 64, 64.

The inlet and outlet portions of the upper horizontal pipe P and the lower horizontal pipe Q are provided with bending guide devices 8 shown in FIGS.
0 is provided (the examples of FIGS. 1 and 8 show examples in which only the entrance of the upper horizontal pipe P is provided). Bending guide device 80
In order to prevent a wear phenomenon in which the belt end of the carrier-side belt 1a having a flat cross-section passing through the tail pulley 3 slides on the inner wall of the upper horizontal pipe entrance, the cross-section of the belt 1a is bent in advance into a U-shape. A plurality of pressing rollers 81, 82, 83, 84 and 85 for pressing the carrier side belt 1a from the outside are arranged in the same cross section.

At the entrance and exit of the lower horizontal pipe Q, the return side belt 1b passing through the belt reversing device 50 tends to move inward.
In addition to 1 to 85, an inner pressing roller 81a and an inner pressing roller 85a sandwiching the edge of the return side belt 1b from the inside on the opposite side of the pressing roller 81 and the pressing roller 85 are arranged. Reference numeral 86 denotes a support for the inner pressing roller 81a and the inner pressing roller 85a. FIG. 11 shows an example in which the bending guide device 80 is arranged at the outlet of the lower horizontal pipe Q.

As described above, in order to prevent the same wear phenomenon from occurring at the outlet of the upper horizontal pipe P and the inlet and outlet of the lower horizontal pipe Q, the bending guide devices 80 are arranged at all four places. Is desirable.

On the other hand, FIGS. 12 and 13 show an embodiment in which a curved portion which bends two-dimensionally is provided on the air-floating conveyor 200. FIGS. 12 and 13 each show a steel tube cylindrical tube or a resin tube. This shows a state in which a cylindrical tube is curved at a curved portion (curved portion) in the horizontal direction within the range of the above-described limited curvature (the radius of curvature R is set to be equal to or more than the above-described limited value). Changes to an elliptical shape in which the major axis is arranged in the vertical direction. In addition, in the tune running place of FIG. 12 and FIG.
As shown in FIG. 14, both the carrier side and the return side are designed to reduce the pitch of the compressed air injection holes 22a and 32a in the belt running direction and to inject compressed air densely into the horizontal pipes P and Q. Since the belts on the convex side of the curved portion tend to go down and the belts on the concave side (the side with the center of curvature) tend to go up, the injection holes 22a, 32a also have horizontal tubes P, Q.
It is desirable to provide at a position deviated to the concave side from the lowermost point of. The amount of eccentricity is larger on the return side than on the carrier side.

If the injection holes 22a and 32a are arranged obliquely to the inside (concave side) of the curved portion instead of the lowermost portion, the injection holes 28a and 38a can be omitted.

The belt conveyor device 100 (first embodiment) shown in FIGS. 1 to 7 and the belt conveyor device 100A (second embodiment) shown in FIG.
The operation of the second belt conveyor device 100B (third embodiment) will be described.

The transported material M is supplied from the inlet 4 on the tail pulley side onto the carrier belt 1a on the carrier trough 10, and is transported by a belt driving device (not shown) and the carrier belt 1a driven by the head pulley 2. Is discharged from the chute 9 on the head pulley side. During operation of the belt conveyor device 100 or the belt conveyor devices 100A, 100B, 100C, the carrier-side belt 1a and the return-side belt 1b are compressed between the carrier-side trough 10 and the return-side trough 12, respectively. It moves while slightly rising due to the film layer due to air, and the abrasion with the troughs 10 and 12 is greatly reduced as compared with the conventional model, and power consumption is reduced.

On the other hand, the belt 1 reversed by the head pulley 2, ie, the return side belt 1b, enters the belt reversing device 50, and the upper surface and the lower surface are turned upside down as described above.
Due to the floating action of the compressed air introduced into and injected into the lower horizontal pipe Q of FIG. Then, after passing through the lower horizontal pipe Q, the belt is turned upside down again by the belt reversing device 50 and returned to the original state, the tail pulley 3 is reversed, and the return side belt 1b becomes the carrier side belt 1a and reaches the input port 4. .

In the belt conveyor device 100A, during the above operation, after the belt is inverted by the belt inverting device 50 after the head pulley 2, the belt 1b passes through the trough forming device 60 and enters the lower horizontal tube Q beforehand. It is formed into a U-shaped cross section to facilitate the introduction into the lower horizontal pipe Q, and as described above, the belt cross section when exiting the lower horizontal pipe Q is formed as U-shaped.
It is held in the shape of a letter to prevent harmful friction between the inner surface of the lower cylindrical tube Q and the end of the belt.

The belt conveyor devices 100, 100A, 1
In 00B, the reason for inverting the return side belt 1b entering the lower horizontal tube Q by the belt inverting device 50 is that the carrier side belt 1a is loaded with the transported material M while being held in the U-shaped cross section by the upper horizontal tube P. Because you travel a long distance,
When the return side belt 1b passes through the lower horizontal pipe Q as it is, the return side belt 1b tends to have a rather inverted U-shaped cross section instead of being flat, and a belt end portion is formed. This is to prevent sliding on the inner side wall of the lower horizontal pipe Q to promote frictional wear.

The belt conveyor device 100 of the present invention
2 to 13, a pair of upper and lower carrier-side belt support troughs 10 (upper horizontal pipe P) and a return-side belt support trough 12 (lower horizontal pipe Q) connected by an air duct 22 as shown in FIGS. Is a main structure, which is only supported on the ground by column bases 40 intermittently arranged in the belt running direction. Therefore, many are arranged in the belt running direction as in the conventional belt conveyor device. A frame (also called a conveyor frame) for supporting the carrier roller is not required, and the equipment cost is greatly reduced. That is, since the pair of upper and lower horizontal pipes P and Q themselves are relatively lightweight, they have rigidity and also function as cross beams, so that the gantry as a cross beam of the conventional belt conveyor device is used. May be omitted. Therefore, in the case of a long distance span or an inclined conveyor, the effect of omitting the gantry becomes remarkable. Further, in addition to the above-described case where the belt is used for a long-span belt conveyor device, a strength member (structure) having a large rigidity such as a long-span portion of cargo handling equipment such as a stacker, a reclaimer, an unloader, and a ship loader. When a member is required, it is convenient to adopt the belt conveyor device of the present invention instead of the flat belt type belt conveyor.

[0038]

The belt conveyor apparatus of the present invention described above employs a long-span air-floating belt conveyor, and arranges a curved position in a horizontal direction at an arbitrary position as necessary, thereby forming a curved portion. Running is possible, and a large amount of high-speed transfer over long distances is possible. In addition, the air-floating type belt conveyor has a closed structure, so there is no noise or contamination of the work environment due to dropping, and there is no loss due to dropping of transported goods. As well as improving the running cost, the running cost due to the reduction in power consumption and the initial cost due to the omission of the gantry can be greatly reduced. Furthermore, in the present invention, the lower inner surface is used as a support trough for the carrier-side belt or the return-side belt by skillfully utilizing a horizontal cylindrical tube or an elliptic tube, and a belt reversing device or a trough forming device is provided on the return side. Since the wear of the belt is significantly reduced, the maintainability is improved, and the operation can be performed safely and stably for a long period of time. In addition, since the bending guide device is disposed at the inlet or the outlet of the horizontal pipe, the belt end is prevented from sliding on the inner wall of the cylindrical pipe, and compressed air is injected from the side of the horizontal pipe at the curved portion. Belt sliding wear can be reduced, belt deterioration due to wear can be prevented, and life can be extended.

[Brief description of the drawings]

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

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

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

FIG. 4 is a schematic perspective view of a belt reversing device according to an embodiment of the present invention.

FIG. 5 is a schematic perspective view of a belt reversing device according to another embodiment of the present invention.

FIG. 6 is a sectional view of a main part of an inclined roller portion of the belt reversing device of FIG. 5;

FIG. 7 is a schematic perspective view of a belt reversing device according to another embodiment of the present invention.

FIG. 8 is an overall side view of a belt conveyor device according to another embodiment (second embodiment) of the present invention.

FIG. 9 is a longitudinal sectional view of a trough forming apparatus according to an embodiment of the present invention.

FIG. 10 is a front view (longitudinal sectional view) of the bending guide device according to the embodiment of the present invention.

FIG. 11 is a perspective view of a bending guide device according to an embodiment of the present invention.

FIG. 12 is an overall plan view of a belt conveyor device according to another embodiment (third embodiment) of the present invention.

FIG. 13 is a cross-sectional view taken along line BB of FIG.

FIG. 14 is a cross-sectional perspective view of a curved portion (curved portion) of a horizontal tube of a belt conveyor device showing another embodiment of the present invention.

[Explanation of symbols]

Reference Signs List 1 belt 1a carrier side belt 1b return side belt 2 head pulley 3 tail pulley 4 slot 7 end cover 8 end cover 9 chute 10 carrier side belt support trough (carrier side trough) 12 return side belt support trough (return side trough) 20 supply Trachea 22 Air duct 22a Injection hole 24 Exhaust pipe 28 Air duct 28a Injection hole 29 Connecting pipe 29a Control valve 30 Air supply pipe 32 Air duct 32a Injection hole 34 Exhaust pipe 38 Air duct 38a Injection hole 39 Connecting pipe 39a Control valve 40 Column base 42 Support 44 Inspection corridor 46 Stand 48 Handrail 50, 50A, 50B Belt reversing device 52 Horizontal scissors roller 52a Cylindrical support roller 54 Rounding roller 56 Support 58 Inclined roller 59 Cylindrical holding roller 59a Vertical press roller 9a Inner press roller 60 Trough forming device 61, 62 Press roller 63, 64 Scissors roller 80 Bending guide device 81, 82, 83, 84, 85 Press roller 81a, 85a Inner press roller 86 Support 100 Belt conveyor device (first embodiment) 100A Belt Conveyor Device (Second Embodiment) 100B Belt Conveyor Device (Third Embodiment) 200 Air Levitated Belt Conveyor M Transport P Upper Horizontal Tube Q Lower Horizontal Tube R Curvature Radius

Claims (5)

[Claims] An endless belt and a belt support trough having a plurality of compressed air injection holes for floating the belt on both the carrier side and the return side of the belt in the belt running direction. An air-floating belt conveyor device having at least one or more curved portions that bend in the horizontal direction along a return belt immediately after being inverted by a driving pulley at an edge of the belt conveyor device, and a belt. A belt reversing device for reversing the upper and lower surfaces of each of the return side belts immediately before reversing by the tail pulley at the edge of the conveyor device is provided, and the belt support trough is a cylinder formed by a pair of upper and lower resin pipes or steel pipes, respectively. It is formed of a horizontal pipe consisting of a pipe or an elliptic pipe, and the carrier side belt is a lower part of the upper horizontal pipe of the pair of horizontal pipes The return side belt is supported on the lower inner surface of the lower horizontal pipe of the pair of horizontal pipes, and a pressure source is provided at the lower part of the injection hole formed at the bottom of each of the horizontal pipes. A compressed air pipe extending in the running direction of the belt that supplies compressed air to the injection hole and is connected to the horizontal hole; and an exhaust port for discharging the compressed air after the belt floating action is provided in the horizontal pipe; In addition, an injection hole for injecting compressed air is formed in both the inner (concave side) side portion of the upper horizontal tube and the inner (concave side) side portion of the lower horizontal tube at the curved portion,
A belt conveyor device, which is connected to a compressed air pipe that communicates with a compressed air source and supplies compressed air to the injection hole. 2. In the case where an elliptical tube is adopted as a pair of upper and lower horizontal tubes, the ratio of the long side to the short side of the steel tube elliptic tube is set to 1.5 or less, and the elliptic tube of the resin tube elliptical tube is used. The ratio of the long side to the short side of the pipe is 2.0 or less, and the radius of curvature at the curved portion of the pair of upper and lower horizontal pipes is 35 times or more the pipe diameter in the case of a steel pipe cylindrical pipe, and the diameter of the pipe in the case of a resin pipe cylindrical pipe. 2. The belt conveyor device according to claim 1, wherein the length is at least 30 times, at least 25 m times the average diameter of the steel pipe elliptic tube, and at least 20 times the average diameter of the resin oval tube. 3. A belt 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 the entrance and the exit of the upper horizontal pipe and the lower horizontal pipe. 3. The belt conveyor device according to claim 1, further comprising a bending guide device having a cross section. 4. A belt reversing device comprising: a horizontal scissor roller provided on a pulley side; a cylindrical support roller provided on a lower cylindrical tube side; and a cylinder having the same cross section provided at an intermediate portion between the two rollers. A plurality of rounding rollers arranged in a circle, or a rounding roller composed of a pair of vertical pressing rollers and a pair of upper and lower inclined inner pressing rollers that support both ends of a bent belt from the inside, respectively, 4. The belt conveyor device according to claim 1, wherein the belt conveyor device is formed by an inclined roller which projects at a plurality of locations separated by a predetermined distance in the axial direction from the support, and which protrudes while abutting and rolling on the back surface of the belt. . 5. Between the belt reversing device and the lower horizontal tube,
The return belt is composed of a pair of upper and lower pressing rollers that roll by contacting the upper and lower surfaces of the cross-section central part and a pair of upper and lower scissors rollers that roll while holding both ends of the return belt at an angle. The belt conveyor device according to claim 1, further comprising a trough forming device that forms the troughs in a bowl shape.