JPH10139118A - Belt conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a belt conveyor device in which curved running can be arbitrarily performed, high speed and large quantity transportation is possible, noise, vibration and environmental contamination are reduced, running cost and installation cost are low, dropping of objects to be transported is eliminated and belt abrasion is reduced. SOLUTION: A return side belt 16 just after it is reversed by a driving pully of an edge end part and a belt reversing device 50 reversing each of the top and bottom faces of the return side belt 16 just before it is reversed by a tail pulley 3 are arranged. Each of belt supporting troughs 10 and 12 is formed by a pair of upper and lower horizontal pipes P and Q. A carrier side belt 1a is supported by the lower inner surface of the upper horizontal pipe P and a return side belt 1b is supported by the lower inner surface of the lower horizontal pipe Q. Compressed air pipes 22 and 32 supplying compressed air into an injection hole punched on the lowermost part of each horizontal pipe are connected. The horizontal pipes are provided with exhaust ports exhausting compressed air after a belt floating action is applied. The pair of upper and lower horizontal pipes P and Q have curved portions curved at the same curvature in left and right directions or the up and down directions.

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. Conveyor, and at the desired location, left or right, or
The present invention relates to a belt conveyor device having a curved portion that is arbitrarily curved in the vertical direction. The belt conveyor device capable of curving and transporting a large amount of goods at high speed over a long distance can be manufactured at low cost. It is intended to be able to be supplied by.

[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. Conveyor belt comprising an air-floating belt conveyor having a belt support trough having a plurality of injection holes in the belt traveling direction, and a return side immediately after being inverted by a driving pulley at an edge of the belt conveyor device. A belt and a belt reversing device for reversing the upper and lower surfaces of the return side belt immediately before reversing with the tail pulley at the edge of the belt conveyor device are provided, and the belt bearing trough is a pair of upper and lower resin pipes or steel pipes, respectively. It is formed of a horizontal tube formed of a formed cylindrical tube or an elliptic tube, and the carrier-side belt is formed of a pair of horizontal tubes. The inlet hole is supported on the lower inner surface of the upper horizontal tube, and the return side belt is supported on the lower inner surface of the lower horizontal tube of the pair of horizontal tubes, and is formed at the bottom of each of the horizontal tubes. A compressed air pipe is connected to a lower portion of the compressed air source and extends along a belt running direction for supplying compressed air to the injection hole and communicating with the compressed air source, and an exhaust port for discharging the compressed air after the belt floating action to the horizontal pipe. The pair of upper and lower horizontal tubes were curved at the same curvature in the horizontal direction or the vertical direction at any position in the longitudinal direction.

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. Further, in the third invention, the belt reversing device according to the first or second invention is such that the belt cross section is U-shaped at at least one of the inlet portion and the outlet portion of the upper horizontal pipe and the lower horizontal pipe. And a bending guide device having a belt cross-section in which a plurality of rollers to be bent are arranged in the same cross-section. In the fourth invention, a horizontal scissor roller provided on the pulley side, a cylindrical support roller provided on the lower cylindrical tube side, and a cylindrical member having the same cross section provided at an intermediate portion between the two rollers. A rounding roller composed of a plurality of arranged rounding rollers, 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, or an inclined support. It is formed by an inclined roller that projects at a plurality of locations separated by a certain distance in the axial direction and sequentially projects at a protruding angle and abuts and rolls on the back surface of the belt. Further, in a fifth invention, in the first to third inventions, a pair of upper and lower retainers rolling between the belt reversing device and the lower cylindrical tube by contacting the upper and lower surfaces of the cross-section central portion of the return side belt. A trough forming device is provided which comprises a pair of upper and lower scissoring rollers which roll by rolling the roller and both ends of the return belt at an angle, and forming a belt cross section in a bowl shape.

[0006]

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 comprising an air-floating belt conveyor having
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. The belt supporting trough is formed of 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 an upper horizontal pipe of the pair of horizontal pipes. The return belt is supported on the lower inner surface of the lower pipe of the pair of horizontal pipes, and the return side belt is mounted on the lower inner surface of the lower horizontal pipe of the pair of horizontal pipes. Is connected to a compressed air pipe extending in the running direction of the belt for supplying compressed air to the injection hole in communication with the compressed air source, and compressing the compressed air after the belt floating action to the horizontal pipe. A pair of upper and lower horizontal pipes is provided at a desired position in the longitudinal direction at a desired position because the horizontal pipe has a curved portion curved at the same curvature in the left-right direction or the up-down direction. It is possible to provide a curved section having an arbitrary curvature within a range that does not hinder,
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. Then, the return side belt is reversed by the belt reversing device and then enveloped in a substantially cylindrical shape, and since the belt overlap portion is located above, the return side belt is transferred in a state where there is no ore dropping of the transported goods. You. 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.

In the second invention, the condition for adopting a pair of upper and lower horizontal pipes having a curved portion is grasped, so that there is no hindrance to the 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. Further, in the third invention, the belt cross-section bending guide device in which a plurality of rollers for bending the cross-section of the belt into a U-shape are arranged in the same cross-section is provided. Since the belt is guided into the cylindrical tube without any trouble, wear of the belt edge can be avoided. According to the fourth aspect of the present invention, the belt reversing device includes a horizontal scissors roller provided on the pulley side, a cylindrical support roller provided on the lower cylindrical tube side, and an intermediate portion provided between the two rollers. A rounding roller composed of a plurality of rounding rollers arranged in a cylindrical shape in cross section, or 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 in the same cross section. Alternatively, the belt can be easily and easily turned over because it is formed of a plurality of portions that are spaced apart from each other by a predetermined distance in the axial direction from the inclined support, and are formed by projecting angles that are sequentially changed and formed by a protruding roller that abuts and rolls 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 belt after the reversal is formed into a U-shaped cross section along the inner surface of the cylindrical tube for guiding the belt in advance. As a result, the belt is smoothly introduced into the cylindrical tube without contacting the edge portion with the inner surface of the cylindrical tube, so that unnecessary wear phenomenon is prevented.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 16 relate to an embodiment of the present invention, FIG. 1 is an overall side view of a belt conveyor device (first embodiment), FIG. 2 is a longitudinal sectional view taken along line AA of FIG. 1, and FIG. FIG. 4 is a schematic perspective view of a belt reversing device, FIG. 5 is a schematic perspective view of a belt reversing device showing another embodiment, and FIG. FIG. 7 is a cross-sectional view of a main part of a belt reversing device showing another embodiment. FIG. 8 is an overall side view of a belt conveyor device (second embodiment) showing another embodiment. FIG. 10 is a front view of the bending guide device, FIG. 11 is a perspective view of the bending guide device, and FIG. 12 is an overall plan view of a belt conveyor device (third embodiment) showing another embodiment. 13 is an overall perspective view of a belt conveyor device (fourth embodiment) showing another embodiment, and FIG. 14 is a view taken along BB of FIG. Vertical sectional view, FIG. 1
5 is a longitudinal sectional view taken along the line CC of FIG. 12, and FIG. 16 is a sectional perspective view of a curved portion (curved portion) of the horizontal pipe.

As shown in FIGS. 1 and 12 to 13, 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. Air levitated belt conveyor 20
For 0, an arbitrary number of necessary curved portions are provided to bend and 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.

The details will be described below. 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 elliptic 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 disposed along the belt running direction, and are formed at the lowermost portion 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 inlet 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 inlet 32a.
Compressed air is supplied to the lower horizontal pipe Q through the lower side to move the return side belt 1b while floating. The air after the levitation action is exhausted by an exhaust pipe 34 provided on the oblique side
Is discharged from

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, a 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 FIGS. 8 and 9, the trough forming device 60 is a flat belt 1 that has passed through the belt reversing device 50.
(Actually, the return side belt 1b) is curved into a U-shaped cross section and smoothly introduced into the lower horizontal pipe Q. In order to prevent the return side belt 1b near the entrance of Q from being flat and the belt end portion being strongly rubbed against the inner wall surface of the lower horizontal pipe and being worn, the belt section is installed for the purpose of holding the belt cross section in a U-shape. is there. 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 63 that sandwich the belt end obliquely,
63, 64 and 64.

The inlet and outlet 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 that has passed through the belt reversing device 50 tends to move inward.
In addition, on the opposite side of the pressing roller 81 and the pressing roller 85, an inner pressing roller 81a and an inner pressing roller 85a sandwiching the edge of the return side belt 1b from the inside 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, it is desirable to dispose the bending guide devices 80 at all four points at the outlet of the upper horizontal pipe P and at the inlet and outlet of the lower horizontal pipe Q in order to prevent the same wear phenomenon from occurring.

On the other hand, FIGS. 12 and 13 show an embodiment in which a curved portion is provided on the air-floating conveyor 200.
FIG. 12 is an example (third embodiment) of a belt conveyor device 100B provided with planar curved portions, and FIG. 13 is an example (fourth embodiment) of a belt conveyor device 100C provided with vertical curved portions. 12 and 13 show a state in which a steel pipe cylindrical pipe or a resin pipe cylindrical pipe is curved in a curved portion (curved portion) in the horizontal or vertical direction within the above-described limited curvature range (the radius of curvature R is set to the above-described value). Above the limit).
In each case, the cylindrical tube has changed to an elliptical shape due to the influence of the curvature. In the curved portions shown in FIGS. 12 and 13, as shown in FIG. 16, the pitches of the compressed air injection ports 22a and 32a in the belt running direction are reduced on both the carrier side and the return side so that compressed air is densely distributed in the horizontal pipe. Care should be taken to inject into the P and Q, and in the case of a horizontal curve (corresponding to FIG. 12), the belt on the convex side of the curved portion goes down, and conversely, the belt on the concave side (the side with the center of curvature). Since the belt tends to rise, the inlets 22a and 32a are also desirably provided at positions deviated from the lowermost points of the horizontal pipes P and Q to the concave side. The amount of eccentricity is larger on the return side than on the carrier side.

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

FIG. 2, FIG. 14, and FIG. 15 show cross sections on the head pulley side and the tail pulley side, respectively.
In addition, the belt conveyor device 100B of FIGS.
In 100C, the carrier-side belt 1a travels while floating above the lower inner surface of the upper horizontal pipe P, and the belt traveling direction is curved horizontally or vertically.

On the other hand, the belt 1 inverted by the head pulley 2, ie, the return side belt 1b, enters the belt inverting 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 and 100C, the reason that the return side belt 1b entering the lower horizontal tube Q is inverted by the belt reversing device 50 is that the carrier M is loaded while the carrier side belt 1a is held in the U-shaped cross section by the upper horizontal tube P. When the return side belt 1b passes through the lower horizontal pipe Q as it is, the return side belt 1b is not flat but rather an inverted U-shaped cross section (curved shape).
This is to prevent the belt end from sliding on the inner side wall of the lower horizontal pipe Q to promote frictional wear.

Further, the belt conveyor device 100 of the present invention
2 to 14C, as shown in FIGS. 2, 14 and 15, 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) connected by an air duct 22. Since the pipe Q) is the main structure and is only supported on the ground by column bases 40 intermittently arranged in the belt running direction, a large number of pipes Q) are provided in the belt running direction as in the conventional belt conveyor device. A frame (also called a conveyor frame) for supporting the arranged carrier rollers becomes unnecessary, 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.

[0027]

The belt conveyor apparatus of the present invention described above employs a long-span air-floating belt conveyor, and can be curved by arranging a curved position at an arbitrary position as required. Thus, 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 provided at the entrance and / or exit of the horizontal pipe, it is possible to prevent the belt end from sliding on the inner wall of the cylindrical pipe, prevent belt deterioration due to abrasion, and prolong the service life. Can be.

[Brief description of the drawings]

FIG. 1 is an overall side view 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 an overall perspective view of a belt conveyor device according to another embodiment (fourth embodiment) of the present invention.

FIG. 14 is a transverse sectional view taken along line BB of FIG. 12;

FIG. 15 is a transverse sectional view taken along the line CC of FIG. 13;

FIG. 16 is a sectional perspective view of a curved portion (curved portion) of the horizontal pipe of the belt conveyor device 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 Inlet 24 Exhaust pipe 30 Intake pipe 32 Air duct 32a Inlet 34 Exhaust pipe 40 Pillar 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 pressing roller 59a inner pressing roller 60 trough forming device 61, 62 pressing roller 63, 64 scissors roller 80 bending guide device 81 82, 83, 84, 85 Pressing rollers 81a, 85a Inner pressing roller 86 Support 100 Belt conveyor device (first embodiment) 100A Belt conveyor device (second embodiment) 100B Belt conveyor device (third embodiment) 100C Belt conveyor Apparatus (fourth embodiment) 200 Air levitated belt conveyor M Transported material P Upper horizontal pipe Q Lower horizontal pipe R Radius of curvature

Claims (5)

[Claims] 1. An air-floating belt conveyor having an endless belt and a belt-supporting trough having a plurality of compressed air injection holes for floating the belt on both a carrier side and a return side of the belt in a belt running direction. A return-side belt immediately after being inverted by a drive pulley at an edge of the belt conveyor device, and a return-side belt immediately before being inverted by a tail pulley at the edge of the belt conveyor device. A belt reversing device for reversing the upper and lower surfaces is provided. Each of the belt support troughs is formed of a pair of upper and lower resin pipes or a horizontal pipe made of a cylindrical pipe or an elliptic pipe formed of a steel pipe, and the carrier side belt is The return belt is supported on the lower inner surface of the upper horizontal pipe of the pair of horizontal pipes, The lower part of the injection hole, which is supported on the lower inner surface of the horizontal pipe and is formed at the lowermost part of each of the horizontal pipes, communicates with a pressurized air source along the belt running direction for supplying compressed air to the injection hole. An extended compressed air pipe is connected, and an exhaust port for discharging the compressed air after the belt floating action is provided in the horizontal pipe. A belt conveyor device having a curved portion curved at the same curvature in a direction. 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.