JP4601194B2 - Air-floating belt conveyor device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air levitation belt conveyor device for smoothly conveying grains such as roses, wheat, soybeans, and rice, and more specifically, an air levitation belt conveyor device in which a guide plate on which the conveyor belt runs is devised. It is about.
[0002]
[Prior art]
Traditionally, bulk materials such as coal, gypsum and wet ash in thermal power plants, iron ore and secondary materials in steelworks, etc., and grains such as wheat, soybeans, and rice (hereinafter referred to as “conveyed materials”) In order to carry smoothly, a conveyor device is used. Recently, an air-floating belt conveyor device using air is useful as a measure against dust and noise.
[0003]
As this type of prior art, there are inventions described in Japanese Patent No. 3027539, Japanese Patent Application Laid-Open No. 9-169418, and Japanese Patent Application Laid-Open No. 9-175618. These inventions are shown in FIGS. 7 (a), (b), (c) as shown in a cross-sectional view showing an example of a conventional air levitation belt conveyor device, a circular tube, a two-stage tube, a V-shape, etc. The guide plate is formed in various shapes.
[0004]
For example, in the air-floating belt conveyor device 51 shown in FIG. 5A, a two-stage guide plate 53 is provided in a circular trough 52 having a sealed structure, and an air supply duct provided at the lower center of these guide plates 53. The conveyed object 57 is transported in a state where the conveyor belt 56 is floated by a predetermined amount from the inner surface of the guide plate 53 by the pressurized air supplied from the blower 55 to 54.
[0005]
Further, in the air-floating belt conveyor device 58 shown in (b), the two-stage trough 59 serves as a guide plate for the conveyor belt 60. In this case, the conveyor belt 60 is levitated by the pressurized air supplied from the blower 62 to the air supply duct 61 that connects the centers of the troughs 59.
[0006]
Further, in the air-floating belt conveyor device 63 shown in (c), a V-shaped guide plate 64 is provided upside down and supplied from an air supply duct 65 provided at the lower center of these guide plates 64. The conveyor belt 66 is lifted by the pressurized air. Also in this case, pressurized air is supplied to the air supply duct from a blower (not shown).
[0007]
[Problems to be solved by the invention]
However, in the case of the air levitation belt conveyor devices 51, 58, 63 as described above, the circular or trough guide plates 53, 59, 64, the air supply ducts 54, 61, 65, etc. are made of a metal material such as steel. It is manufactured using.
[0008]
Therefore, when manufacturing a guide plate with such a metal material, it will be bent to a desired shape by plate bending. However, the bending process has a low processing accuracy, and it is impossible to manufacture curved guide plates 53, 59, and 64 having no irregular shape in terms of the working accuracy.
[0009]
In addition, when the air supply ducts 54, 61, 65 are provided on the guide plates 53, 59, 64, they are usually provided by welding joints. However, when welding is performed, it is unavoidable that residual thermal deformation is caused by the heat. Accordingly, it is difficult to obtain a uniform cross-sectional shape in the longitudinal direction of the guide plates 53, 59, 64. For example, as shown in FIG. 8A, FIG. 8B, and FIG. 8C showing the guide plate shown in FIG. ), The guide plate 53 (59, 64) is bent by a plate bending process, or the air supply duct 54 (61, 65) as shown in the vertical cross-sectional view of (b). ) May cause residual thermal deformation at the welded part.
[0010]
Furthermore, in the case of such an air levitation type belt conveyor device, the length of the belt may be several tens to several hundreds of meters. Therefore, the guide plate is usually divided in the longitudinal direction. When the manufactured guide plate 53 (59, 64) is joined by welding, residual thermal deformation due to welding deformation also occurs at the joint portion, and a small projection due to a weld bead occurs. For example, as shown in the enlarged enlarged view of the welded joint in FIG. 8 (c), the joint portion 67 where the guide plate 53 (59, 64) is joined is subjected to corner bending deformation or a protrusion due to the weld bead 68, and there is no shape irregularity. It is difficult to manufacture a guide plate 53 (59, 64) having a simple shape.
[0011]
When trying to float the conveyor belt using the guide plate 53 (59, 64) having such an irregular shape, the belt and the guide plate 53 (59, 64) are locally located at the irregular portion. The contact surface pressure between the belt and the guide plate increases, and a large contact resistance is generated between the belt and the guide plate. For this reason, the driving force required to realize the predetermined conveyance performance is increased.
[0012]
[Means for Solving the Problems]
In order to solve the above problems, the present invention relates to a guide plate having a semicircular curved surface, a conveyor belt that runs along the inner surface of the guide plate, and the conveyor belt and the guide plate. provided a pressure air supply apparatus for floating the conveyor belt to supply pressure air, together with the molding by pressure-bonding cured a guide plate having a curved surface portion by laminating a predetermined thickness of the fiber-reinforced plastic, the guide plates Air supply holes for supplying pressurized air between the conveyor belt and the conveyor belt at the time of molding are integrally formed at a predetermined pitch in the central longitudinal direction of the curved surface portion, and air supply for supplying pressurized air between the guide plate and the conveyor belt A duct is formed by laminating a fiber reinforced plastic having a predetermined thickness, and the air supply duct is positioned at the air supply hole of the guide plate. Integrally molded by pressure-bonding to, together with the split forming the guide plate in the longitudinal direction is provided integrally with joint mechanically joined to the ends of the divided forming the guide plate. By molding using fiber reinforced plastic in this way, a guide plate having a predetermined curved surface portion can be produced without irregular shapes such as corner bending and sudden curvature change. It is possible to prevent the local contact and realize the predetermined conveying performance of the belt conveyor device. In addition, since the guide plate is formed of fiber reinforced plastic, the weight of the guide plate can be reduced, so that the assembly of the guide plate at the conveyor device installation location can be easily performed. In addition, it is possible to manufacture a guide plate having no irregular shape including the air supply duct, and it is possible to integrally form the air supply holes for supplying the pressure air from the air supply duct without requiring post-processing. In addition, the guide plates that are divided in the longitudinal direction can be mechanically joined to each other without causing distortion and the like so that there is no shape irregularity.
[0015]
Further, by providing a low friction layer on the conveyor belt side surface of the guide plate to reduce the frictional force caused by the contact between the conveyor belt and the guide plate, even if the conveyor belt contacts the guide plate, the friction resistance at the time of contact Can be reduced so that the stable conveyance performance is not impaired.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a drawing of a guide plate showing a first embodiment of the present invention, in which (a) is a perspective view and (b) is a sectional view. FIG. 2 is a drawing of a mold for manufacturing the guide plate, (a) is a perspective view of the mold, and (b) is a perspective view showing a state at the time of manufacture. In this embodiment, a trough-shaped guide plate is taken as an example.
[0018]
As shown in FIGS. 1 (a) and 1 (b), a guide plate 1 in this embodiment is formed by integrating a substantially semicircular curved surface portion 2 and flange portions 3 formed on both sides of the curved surface portion 2. It is molded into. The guide plate 1 is formed of a fiber reinforced plastic (hereinafter referred to as “FRP”) 4 that is laminated and pressure-bonded. In this example, the guide plate 1 is formed of FRP 4 having a four-layer structure. The rubbing conveyor belt 5 runs in a curved shape along the curved surface portion 2 on the inner surface of the guide plate 1. In addition, as shown in FIG. 1A, air supply holes 6 for supplying the pressure air for lifting the conveyor belt 5 are provided at a predetermined pitch in the central longitudinal direction (belt running direction) of the curved surface portion 2. As a feeder for supplying pressurized air to the air supply holes 6, a blower is generally used, and compressed air is sent from the blower. The air supply holes 6 may be provided by a machine tool after the guide plate 1 is formed, or may be provided simultaneously with the formation of the guide plate 1.
[0019]
As shown in FIG. 2 (a), the mold for producing the guide plate 1 has a convex curved surface 7 that forms the curved surface portion 2 in the center, and a flat surface portion 8 that forms the flange portions 3 on both sides. A mold 9 having the following is used. Then, as shown in (b), the integral guide plate 1 is formed by laminating an FRP 4 having a predetermined thickness on the surface of the mold 9 and press-curing it.
[0020]
Therefore, by forming the guide plate 1 by laminating the FRP 4 on the molding die 9 formed in advance with the predetermined curved surface 7, the curved surface portion 2 of the molded guide plate 1 has the same shape as the molding die 9. It is formed into a completely curved shape without irregular shapes. Thus, since it is always formed in the state without irregular shape, the guide plate 1 without irregular shape such that the conveyor belt 5 contacts can be manufactured.
[0021]
By manufacturing the carrier-side and return-side guide plates 1 using such FRP, the conveyor belt 5 exhibits a predetermined conveyance performance without local contact with the guide plate 1 due to the presence of irregular shapes. can do.
[0022]
FIG. 3 is a drawing of a guide plate showing a second embodiment of the present invention, wherein (a) is a perspective view and (b) is a sectional view. FIG. 4 is a perspective view of a mold showing a state in which the guide plate is manufactured. This embodiment is an example in which an air supply duct is integrally formed with the trough-shaped guide plate.
[0023]
As shown in FIGS. 3A and 3B, the guide plate 10 is also formed by integrally forming a substantially semicircular curved surface portion 11 and flange portions 12 formed on both sides of the curved surface portion 11. An air supply duct 13 is integrally formed at the center of the curved surface portion 11. In this example, an air supply duct 13 formed of three layers of FRP 14 is disposed on the outer surface of two layers of the FRP 14 forming the guide plate 10, and the two layers of FRP 14 are bonded to the outer surface thereof. The formed guide plate 10 is formed. The guide plate 10 is also formed of a four-layer FRP 14 that is laminated and pressure-bonded. The rubbing conveyor belt 15 travels in a curved shape along the curved surface portion 11 on the inner surface of the guide plate 10.
[0024]
Further, as shown in FIG. 3 (a), air supply holes 16 for supplying the pressure air for lifting the conveyor belt 15 are provided at a predetermined pitch in the central longitudinal direction (belt running direction) of the curved surface portion 11. The air supply holes 16 may be provided by a machine tool after the guide plate 10 is formed, or may be provided simultaneously with the formation of the guide plate 10.
[0025]
As shown in FIG. 4, the mold for producing the guide plate 10 has a convex curved surface 17 that forms the curved surface portion 11 at the center, and flange portions on both sides, as in the first embodiment. A mold 19 having a flat portion 18 forming 12 is used.
[0026]
Then, a predetermined thickness FRP 14 located on the inner surface side of the guide plate is laminated on the surface of the mold 19 (in this example, two layers), the air supply duct 13 is disposed on the outer surface side, and the FRP 14 having a predetermined thickness is disposed on the outer surface. Are laminated (in this example, two layers), and these are integrally pressed together to form the guide plate 10.
[0027]
Accordingly, the integrally formed guide plate 10 has a curved surface portion 11 having a completely curved surface that has the same shape as the mold 19 and has no irregularities, and supplies air to the curved surface portion 11. The duct 13 is also an integrally formed guide plate 10.
[0028]
In this way, the FRP 14 is laminated on the molding die 19 formed in advance with the predetermined curved surface 17 to form the guide plate 10, and the air supply duct 13 is integrally molded with the guide plate 10, thereby forming the guide plate 10. The curved surface portion 11 on the inner surface is not always irregular in shape, and the guide plate 10 having no irregular shape can be formed in the joint portion of the air supply duct 13, so that there is no irregular shape such that the conveyor belt 15 contacts. The guide plate 10 can be manufactured.
[0029]
FIG. 5 is a drawing of a guide plate showing a third embodiment of the present invention, wherein (a) is a perspective view and (b) is a sectional view. In addition, since the structure of the guide plate in this embodiment is the same as 1st Embodiment mentioned above, the same code | symbol is attached | subjected to the same structure and the description is abbreviate | omitted. In this embodiment, a low friction layer 20 is provided on the conveyor belt side surface of the guide plate 1 to reduce the frictional force when contacting the conveyor belt 5.
[0030]
As shown in the figure, the guide plate 1 according to this embodiment is provided with a low friction layer 20 on the surface on the conveyor belt side, which is the inner surface, for reducing the frictional force at the time of contact with the conveyor belt 5. The low friction layer 20 is formed by applying a low friction material such as a gel coat to the surface of the mold 9 in advance when the guide plate 1 is formed by laminating the FRP 4 on the surface of the mold 9 shown in FIG. Can be easily provided.
[0031]
By providing such a low friction layer 20 on the curved surface portion 2 of the guide plate 1, even if the conveyor belt 5 and the guide plate 1 are locally contacted, the low friction layer 20 increases the frictional resistance. Stable conveyance performance can be exhibited without any problems. Note that the low friction layer 20 may have another configuration as long as it does not generate a large frictional resistance even when the conveyor belt 5 contacts.
[0032]
FIGS. 6A and 6B are diagrams showing an end joint structure of a guide plate according to the present invention. FIG. 6A is a sectional view of the first example, and FIG. 6B is a sectional view of the second example. In this embodiment, the same reference numerals are given to the same components as those in the first embodiment described above, and the description thereof is omitted.
[0033]
In the first example shown in FIG. 6A, one is formed with a recess 21 for fitting at the end of the guide plate 1 to be joined, and the other is formed with a protrusion 22 fitted into the recess 21.
And the convex part 22 is inserted in this recessed part 21, and it is made to join. A groove 24 formed on the inner surface of the fitted joint 23 is filled with a resin material 25 so that the inner surface of the joint 23 is a smooth surface. According to such mechanical joining, a plurality of guide plates 1 can be joined without causing irregular shapes in the joining portion 23 of the guide plate 1.
[0034]
Further, in the second example shown in FIG. 6 (b), at the end portion of the guide plate 1 to be joined, one is a thick portion 26 and the other is a step portion 27 that is in contact with the outer surface side of the thick portion 26. Forming. The step portion 27 is joined to the thick portion 26 with a bolt 28 in a state where the step portion 27 is overlapped on the outer peripheral side of the thick portion 26. The groove portion 30 formed on the inner surface of the joint portion 29 is filled with a resin material 31 so that the inner surface of the joint portion 29 is a smooth surface. Even by such mechanical joining, a plurality of guide plates 1 can be joined without causing irregular shapes at the joining locations of the guide plates 1.
[0035]
Thus, by mechanically joining the guide plates 1 that are divided and manufactured in the longitudinal direction, it is possible to manufacture a guide plate that does not cause shape irregularities at the guide plate joining locations in the longitudinal direction. The joint portions 23 and 29 of the guide plate 1 are not limited to the above-described embodiment, and any configuration may be used as long as the joint portions are not distorted due to distortion or the like.
[0036]
In the above-described embodiment, the trough-shaped guide plates 1 and 10 are taken as an example, but the form of the guide plates 1 and 10 may be other forms and is limited to the above-described embodiment. It is not a thing.
[0037]
Furthermore, the above-described embodiment is an embodiment, and various modifications can be made without departing from the scope of the present invention, and the present invention is not limited to the above-described embodiment.
[0038]
【The invention's effect】
The present invention is implemented in the form described above, and has the following effects.
[0039]
Since the guide plate that supports the conveyor belt can be manufactured so as not to be irregular in shape, the air levitation belt conveyor that prevents the conveyor belt from contacting the guide plate locally and exhibits a predetermined conveyance performance An apparatus can be configured.
[Brief description of the drawings]
FIG. 1 is a drawing of a guide plate showing a first embodiment of the present invention, in which (a) is a perspective view and (b) is a cross-sectional view.
2 is a drawing of a mold for manufacturing the guide plate shown in FIG. 1. FIG. 2 (a) is a perspective view of the mold, and FIG. 2 (b) is a perspective view showing a state at the time of manufacture.
FIG. 3 is a drawing of a guide plate showing a second embodiment of the present invention, in which (a) is a perspective view and (b) is a cross-sectional view.
4 is a perspective view of a mold showing a state in which the guide plate shown in FIG. 3 is manufactured.
FIG. 5 is a drawing of a guide plate showing a third embodiment of the present invention, wherein (a) is a perspective view and (b) is a cross-sectional view.
6A and 6B are diagrams showing an end joint structure of a guide plate according to the present invention. FIG. 6A is a cross-sectional view of a first example, and FIG.
7 (a), (b), and (c) are cross-sectional views showing an example of a conventional air levitation belt conveyor device.
8A and 8B are views showing a conventional guide plate, wherein FIG. 8A is a perspective view, FIG. 8B is a longitudinal sectional view, and FIG. 8C is an enlarged view of a welded joint portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Guide plate 2 ... Curved surface part 3 ... Flange part 4 ... Fiber reinforced plastic 5 ... Conveyor belt 6 ... Air supply hole 7 ... Curved surface 8 ... Plane part 9 ... Mold 10 ... Guide plate 11 ... Curved part 12 ... Flange part 13 ... Air supply duct 14 ... Fiber reinforced plastic 15 ... Conveyor belt 16 ... Air supply hole 17 ... Curved surface 18 ... Flat part 19 ... Mold 20 ... Low friction layer 21 ... Concave part 22 ... Convex part 26 ... Thick part 27 ... Step part 28 ... Bolts 23, 29 ... joints 24, 30 ... grooves 25, 31 ... resin material

Claims (2)

A guide plate having a curved surface portion of the semi-circular, pressure air for floating and the conveyor belt running along the inner surface of the guide plate, the conveyor belt to supply pressure air to the question of the guide plate and the conveyor belt And a guide plate having the curved portion is formed by laminating a fiber reinforced plastic having a predetermined thickness and then being pressure-cured and cured , and at the time of forming the guide plate, pressurized air is supplied to the conveyor belt. The air supply holes are integrally formed at a predetermined pitch in the central longitudinal direction of the curved surface portion,
An air supply duct for supplying pressurized air between the guide plate and the conveyor belt is formed by laminating a fiber reinforced plastic having a predetermined thickness, and the air supply duct is pressure-bonded to a position of an air supply hole of the guide plate. Molded in one piece,
An air-floating type belt conveyor device in which the guide plate is divided and formed in the longitudinal direction, and a joining portion that mechanically joins the end portion of the divided and formed guide plate is integrally provided . 2. The air levitation belt conveyor device according to claim 1, wherein a low friction layer for reducing a frictional force caused by contact between the conveyor belt and the guide plate is provided on a surface of the guide plate on the conveyor belt side.

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