JPH1191919A - Belt conveyer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a belt conveyer device with little belt abrasion which can carry out a curve running at random, and a large amount transporting at a high speed, has no drop of a meneral matter of the transporting article, and a special consideration is given to the bending position in the vertical direction, particularly. SOLUTION: A carrier side belt 1 is supported to an upper side tube body P, a return side belt 12 is supported to a lower side tube body Q, and while air ducts 22 and 32 are provided along the belt running direction, to the lower parts of filling holes formed at the lowermost parts of the tube bodies respectively, a compressed air feeding pipe 36 communicating to a pressure air source, and to feed the compressed air to the filling holes is connected to the air ducts 22 and 32, and an exhaust port 24 to exhaust the compressed air after the floating operation is provided to a holizontal pipe. And at a bending position forming a convex at the upper side in the side surface view of the bending position, of the whole bending position, the running direction pitch of the filling hole of the compressed air formed at the lowermost part of a belt supporting trough is made smaller than the running direction pitch of the compressed air filling hole at the straight line part of a nonbending position, and such filling holes are provided closely.

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 that has a curved section that is arbitrarily curved in the vertical direction. It is capable of curving, and is capable of transporting a large amount of transported goods at high speed over a long distance, especially for belt transfer in a curved section in the vertical direction (vertical direction). The present invention is intended to supply a belt conveyor device capable of transporting between tracks in a bendable manner 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. In addition, in carrier type flat belt conveyors,
Since the belt on the return side is flat and transported in a horizontal state, there is also a problem that it is difficult to provide a curvature. Further, in a belt conveyor device having a curved portion which is curved in a vertical direction along the belt traveling direction, in a curved portion where the side view of the curved portion is convex upward, the belt lower surface contacts the belt lower surface due to the driving tension of the belt. In other words, there is a problem that the belt lower surface is separated from the roller at a curved portion where the side view of the curved portion is concave upward and the running becomes unstable.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned various problems and to provide a belt conveyor device which can be bent and whose equipment cost is low in consideration of belt transfer particularly at a curved portion in a vertical direction, In the present invention, in the first invention, an endless belt and a belt support trough provided with 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 are provided. A belt conveyor device comprising an air-floating belt conveyor having at least one curved portion that is curved in a vertical direction along a belt traveling direction, wherein the belt conveyor device is inverted by a driving pulley at an edge of the belt conveyor device. A belt for reversing the upper and lower surfaces of the immediately following return side belt and a return side belt immediately before being reversed by the tail pulley at the edge of the belt conveyor device. The belt support trough is formed of a pair of upper and lower resin pipes or a cylindrical pipe or an elliptical pipe formed of a steel pipe, and the carrier-side belt is formed of a pair of cylindrical pipes. The lower belt is supported on the lower inner surface of the upper cylinder, and the return belt is supported on the lower inner surface of the lower cylinder of the pair of cylinders, and
An air duct is provided in the lower part of the injection hole formed at the lowermost part of each of the cylinders along the belt running direction and communicates with a compressed air source to supply compressed air to the injection hole along the belt running direction. The extended compressed air supply pipe is connected,
An exhaust port for discharging the compressed air after the belt floating action is provided in the horizontal pipe, and compressed air perforated at the lowest part of the belt support trough at a curved portion of the curved portion where the side view of the curved portion is convex upward. The pitch of the injection hole in the belt running direction is smaller than the pitch of the compressed air injection hole in the straight portion of the non-curved portion in the belt running direction, and the injection holes are densely arranged, and the side view of the curved portion is concave upward. In the curved part, the pitch of the compressed air injection hole drilled at the bottom of the belt support trough in the belt running direction is made larger than the pitch of the compressed air injection hole in the straight part of the non-curved part in the belt running direction to make the injection hole rough. Was placed.

According to a second aspect of the present invention, there is provided an endless belt and a belt support trough provided with 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. A belt conveyor device comprising an air-floating belt conveyor having at least one curved portion that is curved in a vertical direction along a belt traveling direction, wherein the belt conveyor device is inverted by a driving pulley at an edge of the belt conveyor device. A belt reversing device for reversing the upper and lower surfaces of the immediately following return-side belt and the return-side belt immediately before reversing by the tail pulley at the edge of the belt conveyor device is provided, and the belt-supporting trough is a pair of upper and lower resin, respectively. It is formed of a cylindrical body made of a pipe or a steel pipe or a cylindrical pipe made of an elliptical pipe, and the carrier side belt is The lower belt of the pair of cylinders is supported on the lower inner surface of the upper cylinder, and the return-side belt is supported on the lower inner surface of the lower cylinder of the pair of cylinders, and at the bottom of each of the cylinders. An air duct is provided below the perforated injection hole along the belt running direction, and a compressed air supply pipe extending along the belt running direction that communicates with a pressure air source and supplies compressed air to the injection hole is connected. An exhaust port for discharging the compressed air after the belt floating action is provided in the cylindrical body, and distribution pipes connecting the upper and lower air ducts and the compressed air supply pipe are arranged at substantially constant intervals along the belt traveling direction. A plurality of pipes are provided, and a flow control valve is provided in each of the distribution pipes.

According to a third aspect of the present invention, there is provided an endless belt and a belt support trough provided with 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 at least one curved portion that is curved in a vertical direction along a belt traveling direction, wherein the belt conveyor device is inverted by a driving pulley at an edge of the belt conveyor device. A belt reversing device for reversing the upper and lower surfaces of the immediately following return-side belt and the return-side belt immediately before reversing by the tail pulley at the edge of the belt conveyor device is provided, and the belt-supporting trough is a pair of upper and lower resin, respectively. It is formed of a cylindrical body made of a pipe or a steel pipe or a cylindrical pipe made of an elliptical pipe, and the carrier side belt is The lower belt of the pair of cylinders is supported on the lower inner surface of the upper cylinder, and the return-side belt is supported on the lower inner surface of the lower cylinder of the pair of cylinders, and at the bottom of each of the cylinders. An air duct is provided below the perforated injection hole along the belt running direction, and a partition for dividing the air duct into two chambers is provided inside the air duct, and one of the two divided chambers is provided. Communication between the chamber and the pressure source,
A flow control valve is provided between the one chamber and the other chamber communicating with the injection hole, and the cylindrical body is provided with an exhaust port for discharging the compressed air after the belt floating action.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a first aspect of the present invention, an endless belt and a plurality of compressed air injection holes for floating the belt on both the carrier side and the return side of the belt are provided in the belt running direction. With a belt bearing trough,
A belt conveyor device including an air-floating belt conveyor having at least one curved portion that is curved in a vertical direction along a belt traveling direction, the return immediately after being inverted by a driving pulley at an edge of the belt conveyor device. A belt reversing device for reversing the upper and lower surfaces of the side belt and the return belt immediately before reversing by a tail pulley at the edge of the belt conveyor device, wherein the belt support trough is a pair of upper and lower resin pipes or steel pipes, respectively. The carrier-side belt is supported on the lower inner surface of the upper cylinder (ie, the upper cylinder) of the pair of cylinders, and is formed on the return side. The belt is supported on a lower inner surface of a lower cylinder (that is, a lower cylindrical tube) of the pair of cylinders, and each of the cylinders is An air duct is provided below the injection hole formed in the lowermost portion along the belt running direction and communicates with a pressure air source to supply compressed air to the injection hole. A pipe is connected, and an exhaust port for discharging the compressed air after the belt levitation action is provided in the cylindrical body, and at the lowermost part of the belt support trough at a curved portion where the side view of the curved portion protrudes upward in the curved portion. The pitch in the belt running direction of the compressed air injection hole to be bored is smaller than the pitch in the belt running direction of the compressed air injection hole in the straight portion of the non-curved portion, and the injection holes are densely arranged, and the curved portion is viewed from the side. In the curved part where the upper part is concave upward, the pitch in the belt running direction of the compressed air injection hole formed in the lowermost part of the belt support trough is larger than the pitch in the belt running direction of the compressed air injection hole in the straight part of the non-curved part. Since placing the comb injection hole coarse, it can be provided with a Kyokuhashi portion having an arbitrary curvature in the range not interfering with the position required, and,
By moving the running belt while levitating the air, it is possible to convey the goods continuously at high speed in a closed structure. Also, in particular, a large amount of compressed air is supplied to a curved portion having a convex side view, and the supply of compressed air is reduced to a curved portion having a concave side view, so that the belt is smoothly transferred.

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 overlap portion is located at the upper side. Is transported.

Further, since the belt whose section is bent in a U-shape on the carrier side in the upper cylindrical tube passes through the lower cylindrical tube while being bent in the U-shape also on the return side, the belt which is not inverted on the return side is also used. As compared with the above, the wear phenomenon due to the sliding operation on the inner surface of the cylindrical tube at the end of the belt is reduced, and the life of the belt is extended.

[0010] In the second invention, as an alternative to the first invention, an endless belt and a compressed air injection hole for floating the belt on both the carrier side and the return side of the belt are provided in the belt running direction. A belt conveyor device comprising an air-floating belt conveyor having a plurality of belt bearing troughs and having at least one or more curved portions curved vertically 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. The belt support trough is formed of a cylindrical body formed of a pair of upper and lower resin pipes or a cylindrical pipe or an elliptical pipe formed of a steel pipe, and the carrier side belt is an upper cylindrical body of the pair of cylindrical bodies. The return belt is supported on the lower inner surface of the lower body of the pair of cylindrical bodies, and the return-side belt is mounted on the lower part of the injection hole formed in the lowermost part of each of the cylindrical bodies. Is provided with an air duct along the belt running direction and connected to a compressed air supply pipe extending along the belt running direction communicating with the compressed air source and supplying compressed air to the injection hole, An exhaust port for discharging the compressed air after the belt floating action is provided in the cylindrical body, and a plurality of distribution pipes connecting the upper and lower air ducts and the compressed air supply pipe are arranged at substantially constant intervals along the belt running direction. In addition to providing a flow control valve in each of the distribution pipes, the supply amount of compressed air to the curved portion is increased compared to the non-curved portion,
Since it can be reduced, the same operation and effect as the first invention can be obtained.

According to a third aspect of the present invention, there is provided an endless belt and a belt support trough provided with 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. A belt conveyor device comprising an air-floating belt conveyor having at least one curved portion that is curved in a vertical direction along a belt traveling direction, wherein the belt conveyor device is inverted by a driving pulley at an edge of the belt conveyor device. A belt reversing device for reversing the upper and lower surfaces of the immediately following return-side belt and the return-side belt immediately before reversing by the tail pulley at the edge of the belt conveyor device is provided, and the belt-supporting trough is a pair of upper and lower resin, respectively. It is formed of a cylindrical body made of a pipe or a steel pipe or a cylindrical pipe made of an elliptical pipe, and the carrier side belt is The lower belt of the pair of cylinders is supported on the lower inner surface of the upper cylinder, and the return-side belt is supported on the lower inner surface of the lower cylinder of the pair of cylinders, and at the bottom of each of the cylinders. An air duct is provided below the perforated injection hole along the belt running direction, and a partition for dividing the air duct into two chambers is provided inside the air duct, and one of the two divided chambers is provided. Communication between the chamber and the pressure source,
A flow control valve is provided between the one chamber and the other chamber communicating with the injection hole, and the cylindrical body is provided with an exhaust port for discharging the compressed air after the belt floating action. Since the amount of compressed air flowing into the other chamber communicating with the injection hole can be controlled, the same operation and effect as described above can be obtained.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 19 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, FIG. 16 is a sectional perspective view of a curved portion (curved portion) of the cylindrical tube, FIG. 17 is an explanatory diagram of a force acting on the belt at the curved portion, and FIG. FIG. 19 is a longitudinal sectional view of a belt conveyor device (sixth embodiment) showing another embodiment, and FIG. 19 is a vertical sectional view of a belt conveyor device (sixth embodiment) showing another embodiment.

FIG. 1 shows a belt conveyor device 1 according to the present invention.
Reference numeral 00 denotes the belt conveyor devices 100A, 100B, 100C, 1 shown in FIGS. 8, 12, 13, 18, and 19.
Similar to 00D and 100E, the air-floating belt conveyor 200 and the reversing device 50 are connected at required places, and the air-floating belt conveyor 200 is bent to an arbitrary number of necessary places. By providing a curved portion to be bent and carrying a curve, the transported object is transported while bending the transport line. Further, as described later, a trough forming device 60 and a bending guide device 80 are arranged at necessary places,
It is configured so that transported goods can be efficiently transported without any trouble. In particular, the belt conveyor device is provided with technical considerations for a curved portion bent in the vertical direction. Hereinafter, the details will be described.

As shown in FIGS. 1 and 2, an air-floating belt conveyor 200 in a belt conveyor device 100 is used.
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. In an intermediate portion between the head pulley 2 and the tail pulley 3, as shown in FIG. The pair of upper and lower belt support troughs (the carrier-side belt support trough 10 and the return-side belt support trough 12) are made of a cylindrical tube made of a resin tube or a steel tube of vinyl chloride or the like, or an elliptic tube made of a resin tube or a steel tube. It is formed of a cylindrical body. That is, the cylindrical body of the present invention is any one of a steel pipe cylindrical pipe, a steel pipe elliptic 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 cylindrical pipe P and the lower cylindrical pipe Q, any of a steel pipe cylindrical pipe, a steel pipe elliptic pipe, a resin pipe cylindrical pipe, and a resin pipe elliptic pipe may be used. Carrier side belt 1a
Is a carrier-side belt support trough (hereinafter, referred to as a carrier-side trough) 10 that corresponds to the lower inner surface of the upper cylindrical tube P, and is 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 cylindrical tube Q. The upper cylindrical tube and the lower cylindrical tube are collectively referred to as a “tube”.

The upper cylindrical tube P and the lower cylindrical tube Q are connected by an air duct 22 disposed along the belt running direction, and are formed at the lowermost portion of the upper cylindrical tube P at substantially equal intervals in the belt running direction. Air duct 22 through the inlet 22a provided.
Compressed air supplied via the upper side enters the upper cylindrical pipe P and floats the carrier side belt 1a. The air after the floating action is discharged from the exhaust pipe 24. Similarly to the above, an air duct 32 is provided below the lower cylindrical tube Q along the belt running direction.
In addition, compressed air is supplied into the lower cylindrical tube Q through the inlet 32a to move the return side belt 1b while floating. The air after the floating action is exhausted from an exhaust pipe 34 provided on the oblique side surface of the lower cylindrical pipe Q.

The air duct 22 and the air duct 32
Compressed air supply pipe 36 extending along the belt running direction
Accordingly, the flow is communicated by a distribution pipe 38 branched into two at regular intervals in the belt running direction, and flow control valves 38a for controlling the flow rate of the compressed air flowing in the distribution pipe 38 are provided in the middle of the distribution pipes. .

At one end of the upper cylindrical pipe P on the tail pulley side, an inlet 4 for the transported material 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 cylindrical tube 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.

A belt reversing device 50 is provided between the head pulley 2 and the lower cylindrical tube Q and between the tail pulley 3 and the lower cylindrical 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 cylindrical 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 the 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 cylindrical roller leaving the lower cylindrical tube 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 cylindrical tube 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 shows a second embodiment of the present invention, which is different from the belt conveyor device 100 (first embodiment) of FIGS.
The trough forming device 60 is provided between the belt reversing device 50 and the lower cylindrical tube Q. Trough forming device 60
As shown in FIGS. 8 and 9, the flat belt 1 (actually, the return side belt 1 b) that has passed through the belt reversing device 50 is curved into a U-shaped cross-section and smoothly placed on the lower cylindrical pipe Q. For the introduction, the return side belt 1b near the entrance of the lower horizontal pipe Q becomes flat due to the influence of the reversing action of the belt reversing device 50, and the belt end is strongly rubbed against the inner wall of the lower cylindrical pipe. In order to prevent abrasion, the belt is installed for the purpose of holding the cross section of the belt in a U-shape. Specifically, it is composed of 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 scissors rollers 63, 63 and 64 and 64 which sandwich the belt end obliquely.

The inlet and outlet of the upper cylindrical pipe P and the lower cylindrical pipe Q are provided with bending guide devices 8 shown in FIGS.
0 is disposed (the examples of FIGS. 1 and 8 show an example in which only the inlet portion of the upper cylindrical pipe P is installed). 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 cylindrical pipe inlet, 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 cylindrical tube 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 cylindrical tube Q. As described above, it is desirable to dispose the bending guide devices 80 at all four points at the outlet of the upper cylindrical pipe P and at the inlet and outlet of the lower cylindrical 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 addition, as shown in FIG. 16, at the curved portion of FIG.
In addition to taking care to inject compressed air densely into the cylindrical pipes P and Q by reducing the pitch in the belt running direction of the a and 32a, in the case of a horizontal curve (corresponding to FIG. 12), Since the belt on the convex side is lowered and the belt on the concave side (the side with the center of curvature) tends to be raised, the inlets 22a and 32a are also located at positions deviated more concavely than the lowest points of the cylindrical tubes P and Q. It is desirable to provide. The amount of eccentricity is larger on the return side than on the carrier side.

On the other hand, at a curved portion which bends in the vertical direction along the belt running direction, a force as shown in FIG. 17 acts on the belt 1 (carrier side belt 1a) during transfer. That is, the curved portion which becomes convex side view the upper, as shown in FIG. 17 (a), the since the force F _A is added by tension in addition to belt load cargo (conveyed), a non-curved portion The lower surface of the belt is cylindrical (upper cylindrical tube) than the straight part of
Since the inner surface is strongly pressed and the air levitation force is weakened, it is necessary to increase the amount of compressed air supplied to the injection hole 22a in order to reinforce this.

Conversely, at the curved portion concaved upward in side view,
As shown in FIG. 17 (b), the relative weight of cargo (conveyed), since the force pushing up the belt upward from below the force F _B by tension of the belt is added, the linear portion of the non-curved portion Therefore, the amount of compressed air supplied to the injection hole 22a needs to be reduced as compared with the linear portion. The above is generally true for the lower cylindrical tube Q, although the load on the load is removed.

In view of the above, the invented invention is the above-described belt conveyor device 100 (corresponding to the second invention of the present invention) of FIGS. The amount of compressed air is increased by adjusting the valve 38a, and the amount of compressed air is decreased by adjusting the flow control valve 38a at a concave curved portion.

FIG. 18 is a diagram (belt conveyor device 100D) corresponding to the first invention of the present invention.
In FIG. 8 (a), the arrangement pitch of the injection holes 22a and the injection holes 32a is reduced at the convex curved portions to increase the amount of compressed air, and the arrangement pitch of the injection holes 22a and the injection holes 32a is increased at the concave curved portions. To reduce the amount of compressed air. FIG. 18B shows the injection holes 22a and 32a based on the same concept.
In FIG. 18 (c), both the concepts (a) and (b) were adopted at the same time.

FIG. 19 shows a belt conveyor device 100E showing still another embodiment, which corresponds to the third invention of the present invention. That is, the partition 22b that divides each of the air ducts 22 and 32 into two chambers,
32b is provided, a through hole is provided through the partition walls 22b, 32b, and the flow control valves 22c, 32c are provided.
The amount of compressed air supplied to the injection holes 22a and 32a is controlled in the same manner as described above.

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.
3 belt conveyor device 100C (fourth embodiment), FIG.
8 belt conveyor device 100D (fifth embodiment), FIG.
The operation of the ninth belt conveyor device 100E (sixth 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. The belt conveyor device 100 or the belt conveyor devices 100A, 100B, 100C, 100D,
During operation of 100E, the carrier-side belt 1a and the return-side belt 1b move while slightly floating due to the film layer of compressed air formed between the carrier-side trough 10 and the return-side trough 12, respectively. 10, 1
The wear with No. 2 is greatly reduced as compared with the conventional model, and the 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 the case of 100C, the carrier-side belt 1a travels while floating above the lower inner surface of the upper cylindrical tube P, and the belt traveling direction is curved horizontally or vertically.

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 replaced with the top and bottom as described above.
Due to the floating action of the compressed air introduced into and injected into the lower cylindrical pipe Q of FIG. Then, after passing through the lower cylindrical tube Q, the belt is turned upside down again by the belt reversing device 50, 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 is passed through the trough forming device 60 before entering the lower cylindrical tube Q in advance. It is formed in a U-shaped cross section to facilitate introduction into the lower cylindrical tube Q, and as described above, the belt cross section when exiting the lower cylindrical tube Q
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, 100C, 100D, and 100E, the reason for inverting the return side belt 1b in the lower cylindrical tube Q by the belt inverting device 50 is that the carrier side belt 1a is held in the U-shaped cross section by the upper cylindrical tube P, M moves over a long distance while loading M, so the return side belt 1
When b is passed through the lower cylindrical tube Q as it is, the return side belt 1b is not flat but rather tends to have an inverted U-shaped cross section (curved shape). This is to prevent the sliding of the inner side wall of Q from promoting frictional wear.

Further, the belt conveyor device 100 of the present invention
2 to 14E, a pair of upper and lower carrier-side belt support troughs 10 (upper cylindrical tube P) and a return-side belt support trough 12 (lower cylinder) connected by an air duct 22 as shown in FIGS. 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, the pair of upper and lower cylindrical pipes P, Q themselves are relatively lightweight, but have rigidity and also function as a cross beam, so that the gantry as the 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.

In addition to the case where the belt conveyor device is used for a long-span belt conveyor device as described above, a material having a large rigidity such as a long-span portion of a cargo handling facility such as a stacker, a reclaimer, an unloader, and a ship loader. When members (structural members) are required, it is convenient to employ 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 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.

Further, in the present invention, the lower inner surface is used as a support trough for a carrier-side belt or a return-side belt by 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. By providing
Since the wear of the belt has been significantly reduced, the maintainability is improved, and the operation can be performed safely and stably for a long period of time.

Further, in the present invention, the supply amount of the compressed air can be appropriately changed in consideration of the pressing force of the belt against the cylindrical body due to the belt tension and the phenomenon of lifting of the belt particularly at the curved portion in the vertical direction. Therefore, the belt can be smoothly transported at the curved portion, the belt wear phenomenon can be reduced, and the life can be extended.

[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 cylindrical tube of the belt conveyor device of the present invention.

FIG. 17 is an explanatory diagram of a force acting on the belt at a curved portion of the belt conveyor device according to the embodiment of the present invention.

FIG. 18 is an arrangement diagram of injection holes in a belt conveyor device (fifth embodiment) showing another embodiment of the present invention.

FIG. 19 is a longitudinal sectional view of a belt conveyor device (sixth embodiment) 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 Inlet 22b Partition wall 22c Flow control valve 24 Exhaust pipe 30 Air supply pipe 32 Air duct 32a Inlet 32b Partition wall 32c Flow control valve 34 Exhaust pipe 36 Compressed air supply pipe 38 Minute piping 38a Flow control valve 39 Compressed air source 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 pressing Holding roller 59a inner holding roller 60 trough forming device 61,62 holding roller 63,64 scissors roller 80 bending guide device 81,82,83,84,85 holding roller 81a, 85a inner holding roller 86 support 100 belt conveyor device (first) Example) 100A Belt Conveyor Device (Second Example) 100B Belt Conveyor Device (Third Example) 100C Belt Conveyor Device (Fourth Example) 200 Air Levitated Belt Conveyor M Transport P Upper Cylindrical Tube Q Lower Cylindrical Tube R radius of curvature

Claims (3)

[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. A belt conveyor device comprising an air-floating belt conveyor having at least one or more curved portions curved vertically in the direction of the belt conveyor, and a return side belt immediately after being inverted by a driving pulley at an edge of the belt conveyor device. 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 belt conveyor device, wherein the belt support trough is formed of a pair of upper and lower resin pipes or steel pipes, respectively. And a carrier-side belt is formed in the upper part of the pair of cylinders. A return-side belt is supported on a lower inner surface of the cylindrical body, and a return-side belt is supported on a lower inner surface of a lower cylindrical body of the pair of cylindrical bodies, and a lower portion of the injection hole drilled at a lowermost portion of each of the cylindrical bodies. Is connected to a compressed air supply pipe extending along the belt running direction, which is provided with an air duct along the belt running direction and communicates with the compressed air source to supply compressed air to the injection hole, and the belt floats on the horizontal pipe. An exhaust port for discharging the compressed air after the operation is provided. Of the curved portions, at a curved portion in which a side view of the curved portion is convex upward, a belt travel of a compressed air injection hole formed at a lowermost portion of a belt support trough. The direction pitch is smaller than the pitch in the belt running direction of the compressed air injection hole in the straight portion of the non-curved portion, and the injection hole is densely arranged. In the curved portion where the side view of the curved portion is concave upward, the belt support trough is used. Most The pitch in the belt running direction of the compressed air injection hole formed in the part is made larger than the pitch in the belt running direction of the compressed air injection hole in the straight part of the non-curved part, and the injection holes are roughly arranged. Belt conveyor device. 2. An endless belt and a belt support trough having a plurality of compressed air injection holes in the belt running direction for floating the belt on both the carrier side and the return side of the belt, and the belt running direction. A belt conveyor device comprising an air-floating belt conveyor having at least one or more curved portions curved vertically in the direction of the belt conveyor, and a return side belt immediately after being inverted by a driving pulley at an edge of the belt conveyor device. 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 belt conveyor device, wherein the belt support trough is formed of a pair of upper and lower resin pipes or steel pipes, respectively. And a carrier-side belt is formed in the upper part of the pair of cylinders. A return-side belt is supported on a lower inner surface of the cylindrical body, and a return-side belt is supported on a lower inner surface of a lower cylindrical body of the pair of cylindrical bodies, and a lower portion of the injection hole drilled at a lowermost portion of each of the cylindrical bodies. An air duct is provided along the belt running direction, and a compressed air supply pipe extending along the belt running direction that communicates with the compressed air source and supplies compressed air to the injection hole is connected to the cylindrical body, and the belt floats on the cylindrical body. An exhaust port for discharging the compressed air after the operation is provided, and a plurality of distribution pipes connecting the upper and lower air ducts and the compressed air supply pipe are arranged at substantially constant intervals along the belt traveling direction, and A belt conveyor device comprising a flow control valve in each of distribution pipes. 3. An endless belt and a belt support trough having a plurality of compressed air injection holes in the belt running direction for floating the belt on both the carrier side and the return side of the belt. A belt conveyor device comprising an air-floating belt conveyor having at least one or more curved portions curved vertically in the direction of the belt conveyor, and a return side belt immediately after being inverted by a driving pulley at an edge of the belt conveyor device. 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 belt conveyor device, wherein the belt support trough is formed of a pair of upper and lower resin pipes or steel pipes, respectively. And a carrier-side belt is formed in the upper part of the pair of cylinders. A return-side belt is supported on a lower inner surface of the cylindrical body, and a return-side belt is supported on a lower inner surface of a lower cylindrical body of the pair of cylindrical bodies, and a lower portion of the injection hole drilled at a lowermost portion of each of the cylindrical bodies. The air duct is provided along the belt running direction, and a partition is provided inside the air duct to divide the air duct into two chambers, and one of the two divided chambers communicates with the compressed air source. A belt provided with a flow control valve between the one chamber and the other chamber communicating with the injection hole, and an exhaust port for discharging compressed air after the belt floating action is provided in the cylindrical body. Conveyor device.