JP2001019136A - Air-floating type belt conveyer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the manufacturing cost by simplifying the device structure and curtailing the occupying space, to extend the service life of a trough, a conveyer belt, and the like, by reducing the contamination and the abrasion of a return trip trough, and to reduce the maintenance cost and the like. SOLUTION: An forward trip trough 1 and a return trip trough 2 are lined up parallel in the horizontal direction, or the position of the return trip trough 2 is composed to the lower side in the lateral oblique direction, or to the upper side in the lateral oblique direction, to the forward trip trough 1. Or, a pulley for conveyer belt returning is provided in the vertical direction, and the rear surface of the conveyer belt in the forward trip is turned back by contacting to the pulley, and the rear surface is made at the lower side even in the return trip.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-floating type belt conveyor for conveying a conveyed object while supplying compressed air to levitate a conveyer belt, and more particularly to conveying a conveyed object on a conveyor belt. The present invention relates to a belt conveyor device in which both an outward path and a return path after a conveyed object are lowered are of an air floating type.

[0002]

2. Description of the Related Art In recent years, as a belt conveyor capable of reducing noise and vibration and capable of high-speed conveyance, an air-floating belt conveyor which is levitated and supported by an air film has been used.

[0003] As a conventional belt conveyor device of the air floating type for both the outward and return routes, for example, Japanese Unexamined Patent Publication No. 9-1 is disclosed.
There is an invention disclosed in Japanese Patent No. 69418. FIG. 6 shows an outline of the belt conveyor device according to the present invention. This belt conveyor device is configured by providing troughs having a circular cross section at the top and bottom, and connecting the troughs with a connecting member 3. This invention makes the space surrounded by the connecting member and the upper and lower troughs the air chamber of the upper outward trough,
By using it as a support member, the structure is simplified.

[0004]

However, the belt conveyor device according to the invention disclosed in Japanese Patent Application Laid-Open No. 9-169418 has the following problems.

First, it is necessary to separately provide the air chamber for the forward path and the air chamber for the return path, so that the weight of the member increases and the manufacturing cost increases.

Further, since the entire cross-sectional shape is a structure that is taller with respect to the width, it is easy to fall down as it is, and it is necessary to strengthen the lower support structure of the structure. As a result, the overall weight is increased, and at the same time, the installation work is complicated and the production cost is increased.

Further, since the conveying surface (surface) of the conveying belt faces downward on the return path trough, contamination of the return path trough and the like caused by dust falling on the conveying surface, wear progression due to friction with the dirt, and the like, and There is a problem that the maintenance cost increases accordingly.

The present invention solves the above problems by reducing the manufacturing cost by simplifying the structure of the device and reducing the occupied space.
It is an object of the present invention to provide an air-floating belt conveyor device that extends the life of a trough, a conveyor belt, and the like by reducing contamination and wear of a return trough, and further reduces maintenance costs.

[0009]

The above object is achieved by the following invention. The invention according to claim 1 is an air-floating belt conveyor device in which compressed air is supplied from an air chamber provided in a lower portion of a trough to float and convey a conveyor belt disposed in the trough, and the troughs on the outward path and the return path are arranged in parallel. And set a common air chamber under both troughs,
The air-floating belt conveyor device is characterized in that the conveyor belt is made to circulate with the same surface as the surface in the troughs on the outward path and the return path.

According to the present invention, two troughs are arranged in parallel in the horizontal direction, and one trough forwards a conveyed article.
The other is configured to be the return path after the transported object is lowered. An endless conveyor belt is looped between the troughs, and a supply hole for supplying compressed air is provided below each trough. A common air chamber is provided below and between the troughs so as to straddle between the troughs, and compressed air is supplied from the air chamber through the compressed air supply holes to lift the forward and backward conveyor belts. Convey the conveyed object.

As described above, since the troughs on the outward path and the return path are arranged in parallel, the position of the center of gravity of the entire apparatus is lowered and the stability is improved. Further, the air chamber functions as a structure supporting the trough and the air chamber is shared, so that the apparatus can be simplified. When independent air chambers are provided for each trough, the air-tight joining between the troughs can be omitted.

Here, the cross-sectional shape of the trough is preferably a concave curve on an arc or the like in order to stabilize the transport belt, but it may be V-shaped, U-shaped, or horizontal. is there. Further, if the structure of the air chamber is a rectangular structure, it is easy to manufacture, and the stability of the whole apparatus is increased.

According to a second aspect of the present invention, a partition plate is provided in a common air chamber, and the amount of compressed air to be supplied to a forward trough and a backward trough can be arbitrarily adjusted.
It is an air levitation type belt conveyor device as described in the above.

According to the present invention, a partition plate is provided at a position for separating the common air chamber, which is a support structure of the trough, into a forward path and a return path, and the air chambers on the forward path and the return path are provided. Each has a closed structure. Further, flow control valves are respectively provided in the pipes for sending the compressed air from the blower to the respective air chambers, so that the amounts of the compressed air to be supplied to the forward path and the return path can be adjusted arbitrarily.

As described above, since the amount of compressed air sent to each air chamber can be individually adjusted, it is possible to appropriately control the amount of compressed air according to the difference in load applied to the forward and backward transport belts. it can.

By forming the partition plate with an orifice structure having a through hole, it is possible to easily create a pressure difference without separately providing compressed air supply lines in the forward air chamber and the backward air chamber. Becomes

Here, the partition plate can have a thin structure that does not support the trough load, and the structure can be simplified as compared with the case where individual air chambers are provided.

According to a third aspect of the present invention, there is provided an air-floating belt conveyor device according to the first or second aspect, wherein the cross-sectional shape of the trough is circular.

According to the present invention, the cross-sectional shape of the trough is made circular by integrating the upper lid portion. By making the cross section of the trough a circular shape, rigidity is improved, the distance between the support portions can be increased, and the structure can be simplified. In addition, it is possible to prevent dust from being mixed into the conveyed material and to prevent the conveyed material from scattering around.

According to a fourth aspect of the present invention, there is provided an air-floating belt conveyor device according to any one of the first to third aspects, wherein the backward trough is disposed obliquely below or obliquely above the outward trough.

According to the present invention, the position of the return trough is set to be horizontal, diagonally downward or upward with respect to the outward trough, and at this time, the lower trough is positioned so as not to block the lower compressed air supply hole of the upper trough. Are arranged. This makes it possible to arbitrarily design the height and width of the entire device.

According to a fifth aspect of the present invention, a pulley for folding back the conveyor belt is arranged in a vertical direction, and the back surface of the conveyor belt in the forward path is folded back by contacting the pulley, and the back surface is also lower in the return path. The air-floating belt conveyor device according to claim 1, wherein:

According to the present invention, the conveyor belt return pulley is arranged in a vertical direction, and the back side of the transport belt on the outward path (the side opposite to the transport surface) contacts the return pulley and returns. Is arranged so that the back surface is on the lower side. Further, by arranging an arc-shaped guide plate at an end portion where the transport belt enters and exits from each trough, the rotation of the belt is smoothly and reliably performed.

As described above, the pulleys are arranged vertically in the turnover portion of the conveyor belt, and the back surface of the conveyor belt is wound around each of the pulleys, so that the same surface of the conveyor belt in the trough can be used for both the forward path and the return path. Can be surface. Therefore, there is no need to separately provide a belt reversing mechanism, and the structure can be simplified.

According to the present invention, the transport belt is caused to circulate with the same surface as the surface in the forward and backward troughs.
It is possible to reduce the contamination of the return trough and the like due to the fall of the transported object and the like attached to the transport belt, and the wear of the return path trough and the transport belt and the like due to the friction with the attached matter and the dropped object. Further, the deformation (bending in the direction perpendicular to the conveying direction) of the conveying belt on the outward path and the returning path is on the same side, thereby preventing damage to the belt due to fatigue and extending the life of the belt.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

FIG. 1A is a sectional view of an embodiment in which the air chamber is common, and FIG. 1B is a sectional view of an embodiment in which a partition plate is provided in the air chamber.

In the air-floating belt conveyor device of the present invention, an arc-shaped trough having a circular cross section is disposed adjacent to the left and right sides so that one side is a forward path for conveying a conveyed article and the other side is a return path after the conveyed article is lowered. It has a structure in which a box-shaped air chamber D serving also as a support member is arranged below each of the troughs 1 and 2.

When the air chamber is divided into the forward path D1 and the backward path D2, the air chamber can be easily divided by providing the partition plate 8 at the center.

In the present embodiment, a sealing cover 9 is attached to the upper part of each of the arc-shaped troughs 1 and 2 in order to prevent scattering of conveyed articles and the like and invasion of moisture and dust from the outside. However, it is needless to say that the present invention can be implemented without a cover.

FIG. 2 is a schematic diagram showing a compressed air supply system for supplying the outward air chamber and the inward air chamber. By distributing the compressed air supply line from the blower 7 and arranging the flow control valves b1 and b2 in each of the air supply lines L1 and L2, the forward air chamber D1 and the return air can be adjusted according to the loading condition of the conveyed articles. By arbitrarily setting the amount of compressed air to the chamber D2, it is possible to optimize floating conditions.

FIG. 3 shows an embodiment in which a trough having a circular cross section is applied. It has a compressed air supply system similar to that shown in FIG.

FIGS. 4 (a) and 4 (b) show an embodiment in which the return trough is arranged diagonally below and beside the outward trough. Here, a box-shaped air chamber similar to that shown in FIGS. 1A and 1B is arranged.

FIG. 4A shows an embodiment using an arc-shaped trough, and FIG. 4B shows an embodiment using a circular cross-section trough. In this embodiment, the return trough 2 is installed diagonally below the outward trough 1.

FIG. 5 shows an embodiment in which a driving pulley and a driven pulley are provided, and the same surface of the transport belt is the surface of both the forward trough and the backward trough. 5A is a plan view of the entire apparatus, FIG. 5B is a side view of the same apparatus, and FIG.
FIG. 5D is a cross-sectional view of FIG. Here, in FIGS. 5C and 5D, the illustration of the transport belt is omitted. Although FIG. 5 shows a case where the trough is installed horizontally, it is needless to say that the present invention is not limited to this.

The drive pulley 10 and the driven pulley 11 of the transport belt folding section are arranged in the vertical axis direction.
An arc-shaped guide plate 12 is arranged at the end of the conveyor belt B in and out of the conveyor belt 2 to prevent the conveyor belt B from moving.
Further, the back surface of the conveyor belt B (the side opposite to the conveyor surface) is wound around each of the pulleys 10 and 11, and the conveyor belt B is installed so that the back surface of the conveyor belt B is on the lower side even on the return path.

In the present invention, the front and back surfaces of the transport belt are formed in a shape suitable for each application, for example, the transport surface (front surface).
In this case, the unevenness is provided to prevent the transported object from slipping, and on the back surface, a groove or the like for efficiently flowing air can be formed. Furthermore, by making the belt a multi-layered laminated belt, the optimal configuration suitable for the application,
For example, the transport surface (front surface) can be made of a material that does not easily adhere to the transport object and can be easily peeled off, and the rear surface can be made of a material that is not easily worn or a tough material.

[0038]

According to the present invention, it is possible to: 1. The space occupied by the air levitation type belt conveyor device can be reduced. The manufacturing cost of the belt conveyor device can be reduced by simplifying the structure. 3. Further, contamination and wear of the return trough and the belt are reduced, the life of the transport belt and the trough is extended, and the maintenance cost can be reduced. 4. Further, the bending deformation of the transport belt is in the same direction in the forward path and the return path, so that belt damage due to fatigue can be reduced, and the belt life can be extended. 5. Further, the front and back surfaces of the conveyor belt are formed in a shape suitable for each application, for example, a concavo-convex surface is provided on the conveyance surface (front surface) to prevent slippage of a conveyed object, and a groove or the like is provided on the back surface for efficiently flowing air. It can be provided. 6. Further, by forming the belt as a laminated belt having a multilayer structure, an optimum configuration suitable for the application, for example, a transport surface (the front surface) is made of a material to which the transported material is unlikely to adhere and is easy to peel off, and a back surface is made of a material which is hard to be worn. It becomes possible to use a tough material.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of a belt conveyor device related to an arc-shaped trough having a common air chamber. (B) It is sectional drawing of the belt conveyor apparatus which concerns on the arc-shaped trough in which the partition plate was provided in the air chamber.

FIG. 2 is a configuration diagram showing a compressed air supply system that supplies air to a forward air chamber and a backward air chamber.

FIG. 3 shows an embodiment in which a trough having a circular cross section is applied.

FIG. 4 (a) is a cross-sectional view of a belt conveyor device relating to an arc-shaped cross-section trough in which a return-side trough is arranged diagonally below and beside a forward-direction trough. (B) The inbound trough is next to the outbound trough,
It is sectional drawing of the belt conveyor apparatus which concerns on the circular cross-section trough arrange | positioned diagonally downward.

FIG. 5A is an overall plan view of a belt conveyor device. (B) is an overall side view of the belt conveyor device.
(C) It is sectional drawing of AA. (D) It is an arrow view of NN.

FIG. 6 is a schematic diagram of a belt conveyor device according to the related art.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 forward trough 2 return trough 3 connecting member 4 air supply port 5 box-shaped member 6 air supply port 7 blower 8 partition plate 9 hermetic cover 10 drive pulley (head pulley) 11 driven pulley (tail pulley) 12 guide plate 13 inlet 14 discharge Outlet 15 Exhaust port B Conveyor belt D, D1, D2 Air chamber L1, L2 Compressed air supply line b1, b2 Flow control valve

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Shinichiro Aoe 1-2-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 3F023 BA03 BB01 BC01

Claims (5)

[Claims] 1. An air-floating belt conveyor device for supplying compressed air from an air chamber provided at a lower portion of a trough to float and rotate a conveyor belt disposed in a trough,
The air is characterized by arranging troughs in the forward path and the return path in parallel, providing a common air chamber below both troughs, and causing the transport belt to circulate around the same surface in the troughs in the forward path and the return path. Floating belt conveyor device. 2. The air levitation type belt conveyor device according to claim 1, wherein a partition plate is provided in a common air chamber, and an amount of compressed air supplied to a forward trough and a return trough can be arbitrarily adjusted. 3. The air levitation belt conveyor device according to claim 1, wherein the trough has a circular cross section. 4. The return trough is disposed obliquely below or obliquely above the outward trough.
4. An air-floating belt conveyor device according to any one of claims 1 to 3. 5. A conveyance belt folding pulley is disposed in a vertical direction, a back surface of the conveyance belt in the outward path is contacted with the pulley and turned back, and the back surface of the conveyance belt is set to a lower side in the return path. An air-lifting belt conveyor device according to any one of claims 1 to 4.