JP3728888B2 - Belt conveyor equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a belt conveyor device, and more particularly to a belt conveyor device that supports a carrier side belt and a return side belt by a pair of upper and lower semi-cylindrical pipes, and can convey them while floating by compressed air. It is intended that a belt conveyor device capable of transporting a transported object at a high speed at a high speed can be supplied at a low equipment cost.
[0002]
[Prior art]
In a conventional belt conveyor device, a belt for loading and transferring a conveyed product rolls and moves on a central support roller and a pair of left and right side rollers arranged at a plurality of positions approximately equally in the belt traveling direction. The transported goods are transferred. Similarly, the return side belt also rolls and moves on return rollers arranged in a plurality of places.
[0003]
[Problems to be solved by the invention]
However, in such a conventional belt conveyor device, a large amount of power is required to transport a large amount of transported objects over a long distance, and due to restrictions on the rotational resistance and rotational speed of various rollers, There were the following problems.
(1) It was difficult to increase the speed due to restrictions on the belt conveyance speed.
(2) The work environment was deteriorated due to the generation of noise accompanying the rotation of the rollers.
(3) A lot of labor was required for the maintenance of many rollers.
(4) Equipment vibration occurred due to the rotation of the roller.
(5) The service life is short due to wear due to belt rolling and sliding.
[0004]
[Means for Solving the Problems]
In order to solve the above problems and supply a belt conveyor apparatus with low equipment cost, in the present invention, in the first invention, both the endless belt and the belt are floated on the carrier side and the return side. An air levitation type belt conveyor device having a belt support trough provided with a plurality of compressed air injection holes in the belt running direction, each of the belt support troughs having a semicircular cross section and an open top and bottom The upper semi-cylindrical tube is formed of a pair of horizontal semi-cylindrical tubes, and an upper space of the upper semi-cylindrical tube is provided with a protective cover that covers the upper semi-cylindrical tube. A sealed space is formed through the upper half cylindrical tube and the pair of left and right side walls,
The side wall is fastened to a flange provided on the upper part of the upper semi-cylindrical tube and a flange provided on the upper part of the lower semi-cylindrical pipe, and the bottom of the upper semi-cylindrical pipe is the upper end of the lower semi-cylindrical pipe. The carrier-side belt and the return-side belt are both supported on the lower inner surface of the pair of the semi-cylindrical tubes, and are disposed in the lower semi-cylindrical tube. Compressed air pipes extending along the belt running direction for supplying compressed air to the injection holes are connected to the lower portions of the injection holes formed in the lowermost portions of the pipes. cylindrical tube has a configuration that the compressed air after the belt floating effect is provided an exhaust port for discharging to both said enclosed space surrounding the.
[0008]
And in 2nd invention, a square steel pipe was used for the conveyor frame extended in a belt running direction, and this square steel pipe was utilized as an air supply duct of the compressed air for belt levitation.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, in the first invention, the belt support trough is formed of a pair of upper and lower horizontal semi-cylindrical pipes each having a semicircular cross section and opened upward, A sealed space is formed with a protective cover that covers the upper semi-cylindrical tube, and a sealed space is formed on the upper surface of the lower semi-cylindrical tube via the upper semi-cylindrical tube and a pair of left and right side walls. Fastened to a flange provided on the upper part of the upper semi-cylindrical tube and a flange provided on the upper part of the lower semi-cylindrical pipe, the bottom of the upper semi-cylindrical pipe is located below the upper end of the lower semi-cylindrical pipe. Positioned so as to enter the inside of the lower semi-cylindrical tube, the carrier side belt and the return side belt are both supported on the lower inner surfaces of the pair of the semi-cylindrical tubes ,
In addition, a compressed air pipe extending along a belt traveling direction that communicates with a pressure air source and supplies compressed air to the injection hole is connected to the lower part of the injection hole formed in the lowermost part of each of the semi-cylindrical pipes. In addition, an exhaust port for discharging the compressed air after the belt levitation action is provided in the both sealed spaces surrounding both the semi-cylindrical tubes .
[0013]
In the second invention, a square steel pipe is used for the conveyor frame extending in the belt traveling direction, and the square steel pipe is used as an air supply duct for compressed air for belt levitation. Is promoted.
[0014]
【Example】
The details of the embodiments of the present invention will be described below with reference to the drawings. 1 to 10 relate to an embodiment of the present invention, FIG. 1 is an overall side view of a belt conveyor apparatus, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 4 is a schematic perspective view of a pair of sliding bodies constituting the belt reversing device, FIG. 5 is a transition explanatory diagram of the sliding body of the belt reversing device, FIG. 6 is a front view of the sliding body of the belt reversing device, and FIG. FIG. 8 is a longitudinal sectional view of a trough forming device, FIG. 9 is a front view of a bending guide device, and FIG. 10 is a perspective view of the bending guide device.
[0015]
As shown in FIGS. 1 to 2, 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. As shown in FIG. 2, a pair of upper and lower belt support troughs (carrier-side belt support trough 10 and return-side belt support trough 12) are made of resin pipes such as vinyl chloride or steel pipes in the axial direction. A carrier-side belt support trough (hereinafter referred to as a carrier-side trough) 10 that is formed by a horizontal semi-cylindrical tube having a semi-circular cross section manufactured by cutting in half, and supports the carrier-side belt 1a. A return side belt support trough (hereinafter referred to as a return side trough) 12 corresponding to the lower inner surface of the semi-cylindrical pipe P and supporting the return side belt 1b is as follows. Corresponding to the lower inner surface of the lower half cylindrical tube Q.
[0016]
As shown in FIG. 2, the upper semi-cylindrical pipe P and the lower semi-cylindrical pipe Q are arranged in the belt running direction with horizontal flanges at both ends and open at the top and bottom, and are made of channel steel. Further, it is supported on the upper parts of the two left and right conveyor frames 40 arranged on the upper part of the support 42. That is, the flange of the lower semi-cylindrical pipe Q is mounted on the upper frame 40a that is connected to the conveyor frame 40 and extends in the belt traveling direction in the same manner as the conveyor frame 40, and is bolted and nut-coupled. The flange of the upper semi-cylindrical pipe P is placed on the side wall 28 formed of grooved steel or other structural member, and is bolt-nut coupled.
[0017]
Further, a sealed space is formed on the upper surface portion of the upper semi-cylindrical tube P with a protective cover 26 covering the upper semi-cylindrical tube P, while the upper semi-cylindrical tube P and the upper semi-cylindrical tube P are formed on the upper surface portion of the lower semi-cylindrical tube Q. A sealed space is formed through the pair of left and right side walls 28, 28.
[0018]
The upper semi-cylindrical pipe P and the lower semi-cylindrical pipe Q are provided with through holes (injection port 22a and injection port 32a) for blowing compressed air at regular intervals along the belt running in the lower central portion, and the belt running. Air ducts 22 and 32 disposed along a direction are disposed, and compressed air supplied via air supply pipes 20 and 30 connected to the air ducts 22 and 32 is provided in the upper half cylindrical pipe P and the lower half cylindrical pipe Q. The carrier side belt 1a and the return side belt 1b are levitated respectively.
[0019]
The air after the floating action in the upper semi-cylindrical pipe P is discharged from an exhaust pipe 24 attached to a required portion of the protective cover 26. Similarly, the air after the floating action in the lower semi-cylindrical pipe Q is discharged from an exhaust pipe 34 attached to a required portion of the side wall 28.
[0020]
At one end of the upper semi-cylindrical pipe P on the tail pulley side, an inlet 4 for a transported product M is provided, and end covers 7 and 8 covering the tail pulley 3 and the head pulley 2 are provided, respectively. Is connected to a chute 9 for discharging the transported goods M.
[0021]
In addition, as shown in FIG. 2, an inspection corridor 44, a stand 46, a handrail 48, and the like are provided on one side of the support 42 that projects to one side.
[0022]
A belt reversing device 50 is disposed between the head pulley 2 and the lower semi-cylindrical tube Q and between the tail pulley 3 and the lower semi-cylindrical tube Q.
As shown in FIGS. 3 to 6, the belt reversing device 50 is for reversing the upper and lower surfaces of the belt 1 up and down. For example, the side surface is in contact with the belt 1 and the cross section is circular. Alternatively, a plurality of sets of rectangular bodies (a set of three in the example of FIGS. 3 to 5) formed in a rectangular shape are arranged in parallel at substantially equal intervals so as to extend in the belt running direction. The plurality of sets of the plurality of sets of sliding bodies 52 are arranged in such a manner that the inclination direction is changed little by little in the belt running direction along the reverse direction of the belt 1.
[0023]
That is, in the belt reversing device 50, the belt 1 is guided by the plurality of sets of sliding bodies 52 and transferred in a spiral shape with its upper and lower surfaces reversed. Accordingly, since the belt surface moves while sliding on the side surface of the sliding body 52, the material of the sliding body 52 is made of synthetic rubber, friction material, and the like in order to prevent wear due to friction of the sliding surface of the belt 1. A surface layer made of ultra-high molecular weight polyethylene having a low coefficient μ of 0.07 to 0.22 and excellent slipperiness is coated on the surface contacting the belt 1 to reduce the wear of the belt 1 and extend the life of the belt. Make sure to plan.
[0024]
FIG. 5 shows an example of the arrangement of the sliding body group. In the belt reversing device 50 for reversing the return side belt 1b exiting the lower semi-cylindrical pipe Q and heading toward the tail pulley 3, as shown in FIG. 5, (a), (b),... The sliding bodies 52 are arranged respectively.
On the other hand, in the belt reversing device 50 for reversing the belt that exits the head pulley 2 and enters the lower semi-cylindrical tube Q, the sliding bodies 52 are arranged in the order from (e) to (a). Usually, three to nine sliding bodies 52 are arranged at the same position (three are arranged in the examples of FIGS. 3 to 5).
[0025]
FIG. 6 shows an example of the detailed structure of the sliding body 52. The friction coefficient μ described above is 0.07 to 0.0 on the upper surface of a synthetic rubber main body 52a attached to a metal (aluminum or the like) rail 52c. The coating layer 52b made of ultra-high molecular weight polyethylene having a low 0.22 and excellent lubricity was coated. And it fastens to the support structure which is not illustrated via the T-type volt | bolt 52d. The covering layer 52b is worn away by abrasion because the belt surface slides, and therefore it is desirable that the covering layer 52b be detachable from the main body 52a so that it can be replaced with a new one.
[0026]
Each of the belt reversing devices 50 configured as described above reverses the front and back surfaces of the return belt 1b when the return belt 1b passes from the left side to the right side of FIG. . That is, the return belt 1b is guided to a plurality of sets of sliding bodies 52, 52, 52,. Then, head to the tail pulley 3.
When the belt 1 is reversed by the belt reversing device 50 shown in FIGS. 3 to 6, as shown in FIG. 2, the return is reversed when the height gap between the upper half cylindrical pipe P and the lower half cylindrical pipe Q is small. In order to prevent the side belt 1b from interfering with the lower surface of the upper semi-cylindrical tube P, the return side belt 1b is sandwiched between a pair of upper and lower flat carrier rollers immediately before the return side belt 1b enters the belt reversing device 50. It is desirable to move the return side belt 1b downward in advance.
[0027]
On the other hand, a belt conveyor apparatus 100A shown in FIG. 7 shows another embodiment (corresponding to the second invention) of the present invention, and is different from the belt conveyor apparatus 100 of FIGS. In other words, the trough forming device 60 is disposed between 50 and the lower half cylindrical tube Q.
As shown in FIG. 7 and FIG. 8, the trough forming device 60 is formed by bending the flat belt 1 (actually, the return side belt 1b) that has passed through the belt reversing device 50 into a U-shaped cross section and bending the lower half cylinder. In order to introduce smoothly into the pipe Q, the return side belt 1b near the entrance of the lower cylindrical pipe Q becomes flat due to the effect of the reversal action in the belt reversing device 50, and the belt end is in the lower semi-cylindrical pipe. In order to prevent abrasion due to strong rubbing against the face wall, the belt is installed for the purpose of holding the belt cross section 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 squeezing rollers 63 and 63 and 64 and 64 that sandwich the belt end portion diagonally.
[0028]
Also, a bending guide device 80 shown in FIGS. 9 and 10 is disposed at the inlet and outlet of the upper semi-cylindrical pipe P and the lower semi-cylindrical pipe Q (in the embodiment shown in FIGS. The example which installed only the entrance part of the semi-cylindrical pipe P is shown). The bending guide device 80 has a cross-section of the belt 1a in advance in order to prevent a wear phenomenon in which the belt end of the carrier side belt 1a having a flat cross-sectional shape that has passed through the tail pulley 3 slides on the inner wall of the upper cylindrical tube inlet. A plurality of presser rollers 81, 82, 83, 84, 85 that press the carrier side belt 1a from the outside are arranged in the same cross section.
[0029]
At the entrance and exit of the lower semi-cylindrical tube Q, the return side belt 1b that has passed through the belt reversing device 50 tends to move inward, so that the presser roller 81 in addition to the five outer presser rollers 81-85. On the opposite side of the presser roller 85, an inner presser roller 81a and an inner presser roller 85a sandwiching the edge of the return side belt 1b from the inner side are arranged. Reference numeral 86 denotes a support for the inner pressing roller 81a and the inner pressing roller 85a. FIG. 10 shows an example in which the bending guide device 80 is arranged at the outlet of the lower semi-cylindrical tube Q.
[0030]
Thus, in order to prevent the same wear phenomenon from occurring at the outlet part of the upper semi-cylindrical pipe P and the inlet part and outlet part of the lower semi-cylindrical pipe Q, the bending guide devices 80 are arranged at four locations. desirable.
[0031]
The operation of the belt conveyor apparatus 100 shown in FIGS. 1 to 6 and the belt conveyor apparatus 100A shown in FIGS. 7 to 8 configured as described above will be described.
The transported material M is supplied from the inlet 4 on the tail pulley side onto the carrier side belt 1a on the carrier side trough 10, and is transferred by the carrier side belt 1a driven by the belt driving device and the head pulley 2 (not shown). It is discharged from the side chute 9. During the operation of the belt conveyor device 100 or the belt conveyor device 100A, the carrier side belt 1a and the return side belt 1b are respectively a film layer formed by compressed air formed between the carrier side trough 10 and the return side trough 12. Therefore, the wear with the troughs 10 and 12 is greatly reduced as compared with the conventional model, and the power consumption is reduced. FIG. 2 shows a sectional state of the head pulley side and the tail pulley side, respectively.
[0032]
On the other hand, the belt 1 reversed by the head pulley 2, that is, 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. In response to the floating action of the compressed air introduced and injected, it moves while slightly floating. Then, after passing through the lower semi-cylindrical tube 50, it is returned to its original state when it is turned upside down again by the belt turning device 50, the tail pulley 3 is turned over, and the return side belt 1b becomes the carrier side belt 1a. Reach.
[0033]
In the belt conveyor apparatus 100A, in the above operation, after the belt is reversed by the belt reversing apparatus 50 after the head pulley 2, the belt 1b is passed through the trough forming apparatus 60 and before entering the lower half cylindrical pipe Q in advance. In order to facilitate introduction into the lower semi-cylindrical tube Q by forming a cross-section, and as described above, the belt cross-section when exiting the lower semi-cylindrical tube Q is held in a U shape, and the inner surface of the lower semi-cylindrical tube Q Prevents harmful friction between the belt and the end of the belt.
[0034]
In the belt conveyor apparatus 100 and the belt conveyor apparatus 100A, the reason for reversing the return side belt 1b entering the lower semi-cylindrical tube Q by the belt reversing device 50 is that the carrier side belt 1a is held in the U-shaped cross section by the upper semi-cylindrical pipe P. As the return side belt 1b passes through the lower semi-cylindrical pipe Q as it is, the return side belt 1b is not flat but rather reverse U. This is to prevent the belt end from sliding on the inner side wall of the lower semi-cylindrical tube Q and promoting frictional wear.
[0035]
In the present invention, semi-cylindrical pipes are adopted for the belt support troughs at the top and bottom, compared to a vertical double cylindrical pipe type belt conveyor device having a belt support trough in which two cylindrical pipes are arranged vertically. In addition, the weight is halved and the material cost and production cost are remarkably low. Especially in the case of a large machine with a steel pipe diameter exceeding 700 mm, its economic effect is remarkable, and the air-floating belt support trough is made of stainless steel. When used as a material, the economic effect is extremely large. In the case of a small machine having a steel pipe diameter of 500 mm or less that is difficult for an operator to enter and exit, the drilling work of the compressed air inlets 22a and 32a is extremely easy as compared to the case of a cylindrical pipe.
[0036]
Since the vertical double semi-cylindrical tube system of the present invention has a lower bending rigidity between the belt running direction spans than the vertical double cylindrical tube system, it is necessary to reinforce the bending rigidity of the conveyor support. However, when removing a set of three carrier rollers and a set of return rollers from an existing flat belt conveyor and using the existing conveyor frame as it is to convert it into an air-floating belt conveyor, the flat belt Since the conveyor frame (of many truss structures) is originally designed to have high bending rigidity, the bending rigidity of the air-floating belt conveyor main body is not necessary and space saving is realized. Furthermore, in the present invention, disassembly and inspection are easy, and maintenance is improved.
[0037]
【The invention's effect】
In the belt conveyor apparatus of the present invention described above, a large amount of high-speed transfer over a long distance is possible, and because of the sealed structure, there is no noise generation or contamination of the work environment due to falling ore, and the conventional problems are solved, and maintenance management is performed. This makes it easier to maintain and improves the maintenance, and also enables a significant reduction in running cost and initial cost by reducing power consumption.
Particularly in the present invention, the semi-cylindrical tube by using skillfully economically, since the lower inner surface the bearing troughs of the carrier belt and return side belt, space becomes also improves the maintainability, safety, And it can operate stably for a long time.
[0038]
Further, if a square steel pipe is used for the conveyor frame extending in the belt traveling direction, and the square steel pipe is used as an air supply duct for compressed air for levitation of the belt, reduction of manufacturing costs is promoted.
[0039]
Furthermore, since the belt is passed through a semi-cylindrical tube formed in a sealed space, there is no falling of the transported goods, so that the working environment is clean and good, and there is no loss of the transported goods.
[Brief description of the drawings]
FIG. 1 is an overall side view of a belt conveyor apparatus according to an embodiment of the present invention.
2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a schematic perspective view of a belt reversing device according to an embodiment of the present invention.
FIG. 4 is a schematic perspective view of one of the curved plates constituting the belt reversing device according to the embodiment of the present invention.
FIG. 5 is a transition explanatory diagram of a curved plate of a belt reversing device according to another embodiment of the present invention.
FIG. 6 is a front view of a sliding body of the belt reversing device according to the embodiment of the present invention.
FIG. 7 is an overall side view of a belt conveyor device according to another embodiment of the present invention.
FIG. 8 is a longitudinal sectional view of a trough forming device according to an embodiment of the present invention.
FIG. 9 is a longitudinal sectional view of a bending guide device according to an embodiment of the present invention.
FIG. 10 is a perspective view of a bending guide device according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Belt 1a Carrier side belt 1b Return side belt 2 Head pulley 3 Tail pulley 4 Input port 7 End cover 8 End cover 9 Chute 10 Carrier side belt support trough (carrier side trough)
12 Return side belt support trough (return side trough)
20 Supply pipe 22 Air duct 22a Inlet 24 Exhaust pipe 26 Protective cover 28 Side wall 30 Intake pipe 32 Air duct 32a Inlet 34 Exhaust pipe 40 Conveyor frame 40a Upper frame 42 Support 44 Inspection corridor 46 Stand 48 Handrail 50 Belt reversing device 52 Moving body 52a Main body 52b Cover layer 52c Rail 52d T-bolt 58 Flat roller 60 Trough forming device 61, 62 Pressing roller 63, 64 Stagnation roller 80 Bending guide device 81, 82, 83, 84, 85 Pressing roller 81a, 85a Inner pressing roller 86 Support 100 Belt conveyor device 100A Belt conveyor device M Transported material P Upper half cylindrical tube Q Lower half cylindrical tube

Claims (2)

An air levitation type belt conveyor device having an endless belt and a belt support trough provided with a plurality of compressed air injection holes for levitation of the belt on the carrier side and the return side of the belt in the belt traveling direction. ,
Each of the belt support troughs is formed of a pair of upper and lower horizontal semi-cylindrical pipes having a semicircular cross section and opened upward, and a protective cover that covers the upper semi-cylindrical pipe on an upper surface portion of the upper semi-cylindrical pipe A sealed space is formed with
A sealed space is formed on the upper surface of the lower semi-cylindrical tube via the upper semi-cylindrical tube and a pair of left and right side walls,
The side wall is fastened to a flange provided on the upper part of the upper semi-cylindrical tube and a flange provided on the upper part of the lower semi-cylindrical pipe, and the bottom of the upper semi-cylindrical pipe is the upper end of the lower semi-cylindrical pipe. Located below and inside the lower semi-cylindrical tube,
Both the carrier side belt and the return side belt are supported on the lower inner surface of the pair of semi-cylindrical tubes,
In addition, a compressed air pipe extending along a belt traveling direction that communicates with a pressure air source and supplies compressed air to the injection hole is connected to the lower part of the injection hole formed in the lowermost part of each of the semi-cylindrical pipes. And a belt conveyor device provided with exhaust ports for discharging the compressed air after the belt levitation action in both sealed spaces surrounding both the semi-cylindrical tubes . 2. The belt conveyor apparatus according to claim 1 , wherein a square steel pipe is used for a conveyor frame extending in the belt traveling direction, and the square steel pipe is used as an air supply duct for compressed air for levitation of the belt.

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