JPH0820421A - Cleaning method and device of conveyor system - Google Patents

Abstract

PURPOSE:To provide the cleaning method and device of a conveyor system, capable of recovering powder and granular materials stuck to an inner wall of a trough guding a belt. CONSTITUTION:A cleaner 40 is provided with a travel carriage consisting of a pair of curved members 41 and 42 circularly curved along the inner wall of a trough, four connecting members 46 connecting these curved members 41, 42 at the specified interval, and two travel rollers 47 supporting these paired members 41 and 42 in a three-point suspension manner. Another pair of curved members 43 and 44 curved at a yet smaller radius of curvature are set up in each upper part of these curved members 41 and 42, and they are clamped tight via a spacer member. In addition, two clamps 48 for holding a conveyor belt 1 between are set up at the center of these members 43 and 44 and both the sides. In succession, a wire brush 53 to rub the inner wall is attached to the front curved member 41. Likewise, a halved cylindrical scraper member 52 curved along the inner wall form is installed in the rear curved member 42.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for cleaning a conveyor device for smoothly carrying general loose materials such as sand, crushed stone, coal and cement and grains such as wheat, soybean and rice.

[0002]

2. Description of the Related Art Conventionally, a belt conveyor has been used as a means for transporting powdered or granular material. However, a considerable amount of powdered or granular material being transported drops from both ends of the belt, so that a worker can scoop a scoop or the like. Used to collect the spilled powder.

Instead of such manual collection work, up to a scraping device for scraping powder particles falling on the floor below the belt with a scraper and a conveyor belt located above the powder particles are scraped up. A powder / granular material cargo recovery device using a lifting device for lifting has been proposed.
No. 38178).

Further, one scraper is attached to the wire rope, and the scraper is moved by a winch to collect the powder particles that have fallen on the floor surface, and then the recovered powder particles are transferred to a conveyor belt by an air transport pipe. A powder and granular material recovery device that is returned is proposed (Japanese Utility Model Laid-Open No. 6-23928).

In the above-mentioned collecting device, the powder particles that have fallen from the belt are collected on the floor surface and collected on the belt located above, so that the device becomes large, complicated and costly. There is a tendency.

On the other hand, a rollerless conveyor which does not use a row of conveyor rollers has been recently developed. This is a system in which a double pipe structure including an inner pipe and an outer pipe is adopted, and a flexible conveyor belt is run along the lower inner wall of the inner pipe and the outer pipe. Furthermore, if necessary, air pressure is supplied between the conveyor belt and the inner pipe and the outer pipe to levitate the conveyor belt to reduce friction. The rollerless method has a feature that the conveyor belt is supported by the inner wall of the pipe, so that the structure is simple and high-speed conveyance is possible with low noise and low vibration.

[0007]

In such a rollerless conveyor, when the granular material being conveyed falls from both sides of the belt and the granular material accumulates in the gap between the conveyor belt and the inner pipe, the belt runs. Friction increases and it becomes difficult to float air. Also, when the conveyor belt of the inner tube on which the powder particles are placed passes through the inversion path, a part of the powder particles adheres to the back surface of the conveyor belt of the outer tube, leaving a gap between the conveyor belt and the outer tube. It may be accumulated.

Further, as the total length of the belt conveyor becomes longer, the amount of powder particles that have fallen also increases. However, since manual collection work is structurally difficult, the powder particles that have fallen onto the wall surfaces of the inner pipe and the outer pipe in the rollerless conveyor are structurally difficult. The method and apparatus for collecting the particles have not been developed yet.

It is an object of the present invention to provide a cleaning method and device for a conveyor device which can efficiently collect the powder particles adhering to the inner wall of the gutter guiding the conveyor belt.

[0010]

SUMMARY OF THE INVENTION The present invention is a method of cleaning a conveyor device in which a conveyor belt is run along the lower inner wall of a gutter and pressurized gas is supplied between the conveyor belt and the gutter to float the conveyor belt. After fixing a traveling carriage having a scraping member for scraping the inner wall of the gutter to the conveyor belt, the traveling carriage is caused to travel by the traveling of the conveyor belt, and the granular material adhered to the inner wall of the gutter is scraped and collected. The method for cleaning a conveyor device is characterized in that

Further, according to the present invention, a conveyor belt is stretched between a head pulley and a tail pulley, and the conveyor belt is run along each inner bottom wall of an inner gutter and an outer gutter arranged around the inner gutter, In a method for cleaning a conveyor device in which a pressure gas is supplied between a conveyor belt and inner and outer gutters to float the conveyor belt, a traveling carriage having a scraping member for scraping an inner wall of the gutter is provided with an inner gutter on a head pulley side. The process of fixing to the conveyor belt in the vicinity of the opening, and driving the conveyor belt to run the traveling carriage toward the tail pulley side, scrape off the powder particles adhering to the inner wall of the inner gutter, and place it on the conveyor belt of the outer gutter. And a step of further traveling the conveyor belt in the same direction to convey the powder particles collected on the conveyor belt of the outer gutter to the head pulley side and collect the powder particles. It is method of cleaning a conveyor device according to claim.

Further, according to the present invention, in a cleaning device for a conveyor device, in which a conveyor belt is run along a lower inner wall of a gutter, and pressurized gas is supplied between the conveyor belt and the gutter to float the conveyor belt, the inner wall of the gutter is A scraping member for scraping, a traveling carriage equipped with the scraping member and traveling along the inner wall of the gutter, and a fixing means for fixing the conveyor belt and the traveling carriage. It is a cleaning device for the conveyor device.

Further, the present invention is characterized in that the traveling carriage is provided with a brush for rubbing the inner wall of the gutter in front of the scraping member in the traveling direction.

[0014]

According to the cleaning method of the present invention, since it becomes possible to drive the traveling carriage having the scraping member by the conveyor belt, it is not necessary to install a special driving device such as a wire or winch, and the gutter can be used. Cleaning work for collecting the fallen powder can be easily performed. Further, due to this cleaning work, there is no obstacle in the gap between the conveyor belt and the inner wall of the gutter, so that the traveling of the conveyor belt becomes stable.

Further, when the traveling carriage having the scraping member is fixed to the conveyor belt near the inner gutter opening on the head pulley side, which is the belt drive source, and the conveyor belt is caused to travel in the opposite direction to the normal operation, the traveling The dolly runs from the head pulley side to the tail pulley side. As a result, the powder particles adhering to the inner wall of the inner gutter are scraped off and fall onto the conveyor belt of the outer gutter from the opening of the inner gutter on the tail pulley side. In this way, most of the granular material remaining in the inner gutter is collected by the conveyor belt below. Next, when the traveling carriage in the inner gutter is removed and the conveyor belt is continued to run in the opposite direction to the normal operation, the granular material collected from the inner gutter is conveyed to the head pulley side, for example, to the conveyor belt. By installing the diagonal scraping member, the powder particles on the conveyor belt are discharged laterally and collected in the chute below. Therefore, the powder particles remaining in the inner gutter are collected by the chute on the head pulley side used during normal operation, and it is not necessary to separately install a special chute. Furthermore, in order to collect the powder and granules remaining in the outer gutter,
It suffices to drive the traveling carriage having the scraping member from the outer gutter opening on the tail pulley side, and the traveling carriage is collected by the chute on the head pulley side. In this way, all the powder particles remaining in the inner gutter and the outer gutter can be collected in the chute on the head pulley side.

Further, according to the cleaning apparatus of the present invention, since the traveling carriage is caused to travel by the conveyor belt, a special drive device such as a wire is unnecessary. The traveling carriage is provided with a scraping member for scraping the inner wall of the gutter, and when the traveling carriage travels, powder particles remaining in the gutter are scraped off,
The powder and granular material can be easily collected.

Further, since the traveling carriage is provided with a brush for rubbing the inner wall of the gutter forward of the scraping member in the traveling direction, even if the granular material is firmly fixed to the inner wall of the gutter,
The brush is roughened to weaken the adhesive force of the powder and granules, and the collection efficiency of the scraping member is improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall schematic view showing the structure of a conveyor device according to the present invention. FIG. 1 (a) is a partially cutaway plan view and FIG. 1 (b) is a partially cutaway front view. 2A is a sectional view taken along line A1-A1 in FIG. 1B, and FIG. 2B is a cutaway perspective view of a portion A2 in FIG. 1B. This conveyor device has a structure in which an inner gutter 10 and an outer gutter 20 are arranged in a double tubular shape, and has a flexible conveyor belt 1
Runs in a curved shape along the lower inner walls of the inner gutter 10 and the outer gutter 20. The conveyor belt 1 is stretched around a head pulley 2 and a tail pulley 3 installed on both sides of the inner gutter 10 and the outer gutter 20, and the outward belt 1a passes from the tail pulley 3 through the inner gutter 10 toward the head pulley 2. When traveling, the return belt 1b moves from the head pulley 2 to the outer gutter 20.
Drive through the inside toward the tail pulley 3. The head pulley 2 is a cylindrical member that is driven to rotate by a motor 32, and the tail pulley 3 is a cylindrical member that is driven to rotate.
The conveyor belt 1 is wound around the outer peripheral surface of each cylindrical member.
Therefore, the sectional shape of the conveyor belt 1 is such that the head pulley 2, the tail pulley 3, the inner gutter 10 and the outer gutter 20 are formed.
The linear shape is converted to an arc shape between and. In addition, rollers 8 and 9 that contact the back surface of the return belt 1b and change the traveling path are arranged on both sides of the outer gutter 20. Further, immediately after the traveling direction is reversed by the head pulley 2, the return belt 1b
A belt cleaner 30 for cleaning the back surface of the belt is installed.

In the vicinity of the upper portion of the outer gutter 20 on the side of the tail pulley 3, an input port 4 for inputting a conveyed product M such as powder or granular material is formed, and the introduced conveyed product M is the forward belt 1 of the inner gutter 10.
It is mounted on a. When the conveyed article M is conveyed by the outward belt 1a and reaches the head pulley 2, it is dropped downward due to the reversal of the conveyor belt 1 and is collected by the chute 7.

In order to reduce the running friction of the conveyor belt 1, a blower device 33 for supplying a pressure gas such as compressed air is installed between the conveyor belt 1 and the inner gutter 10 and the outer gutter 20. The blower device 33 takes in, for example, air from the outside via a dust filter or the like, and
Compressed air is supplied to 4, 35.

As shown in FIG. 2, a duct 21 is installed in the lower part of the outer wall of the outer gutter 20 along the longitudinal direction of the outer gutter 20 to connect the inner space of the duct 21 and the inner space of the outer gutter 20. A large number of communication holes 22 are formed at predetermined intervals. The duct 21 is connected to the pipe line 34 of the blower device 33 and is supplied with air pressure adjusted by a damper or the like. The air in the duct 21 is blown out vigorously from the large number of communication holes 22 to form an air layer between the back surface of the return path belt 1b and the inner wall of the outer gutter 20 to float the return path belt 1b. The air leaking from the air layer passes through the inner space of the outer gutter 20 and is discharged from the exhaust pipe 6 installed on the upper portion of the chute 7.

As shown in FIG. 2, a duct 11 is installed in the lower part of the outer wall of the inner gutter 10 along the longitudinal direction of the inner gutter 10 to connect the inner space of the duct 11 and the inner space of the inner gutter 10. A large number of communication holes 12 are provided at predetermined intervals. The duct 11 is connected to the conduit 35 of the blower device 33 and is supplied with air pressure adjusted by a damper or the like. The air in the duct 11 blows out vigorously from the large number of communication holes 12 to form an air layer between the back surface of the outward path belt 1a and the inner wall of the inner gutter 10 to float the outward path belt 1a. The air leaking from the air layer passes through the inner space of the inner gutter 10 and is discharged from the exhaust pipe 5 and the head portion exhaust pipe 6 which are installed side by side with the inlet 4.

In this way, the conveyor belt 1 is allowed to travel along the inner walls of the inner gutter 10 and the outer gutter 20 while being floated by air, so that smooth conveyance is realized. In addition,
An openable / closable inspection window 31 for inspecting the inside of the inner gutter 10 or the outer gutter 20 is appropriately installed, for example, on the upper and side portions of the outer gutter 20 or the upper portion of the chute 7.

FIG. 3 is a plan view showing an embodiment of the present invention, and FIG. 4 is a sectional view taken along line A3-A3 in FIG.
FIG. 5 is a side view. The cleaning device 40 includes a pair of bending members 41, 42 curved in an arc shape along the inner wall of the inner gutter or the outer gutter.
And a traveling carriage including four connecting members 46 that connect the bending member 41 and the bending member 42 at predetermined intervals, and a running roller 47 that supports the bending members 41 and 42 at three points.

A pair of bending members 43, 44 curved with a smaller radius of curvature are arranged above the bending members 41, 42, and fixed via a spacer member 45. A clamp 48 for sandwiching the conveyor belt 1 is installed at the center of each of the bending members 43 and 44 and both sides thereof. The clamp 48 connects the conveyor belt 1 to the bending members 41, 42.
Pressing plate 49 for pressing against the pressing plate 4
Bolt 50 for vertically displacing 9, and bolt 50
And a lock nut 51 for fixing the position.

On the front surface of the front bending member 41, a wire brush 53 for rubbing the inner walls of the inner gutter and the outer gutter to roughen the surface is attached in an arc shape. The wire brush 5
The brush 3 may be a brush such as a rotating brush which itself moves. Further, the rear bending member 42 is provided with a half-cut cylindrical scraping member 52 which is curved along the shape of the inner wall. The tip 52a of the scraping member 52 has a circular arc shape that is recessed from both ends toward the center, whereby the powder particles adhering to the inner wall are scraped toward the center, and the scraping member 52 is efficiently positioned on the scraping member 52. To be collected.

Next, the cleaning method according to the present invention will be described. When the cleaning device 40 configured as described above is mounted on the conveyor belt 1, the upper curved members 43 and 44 and the spacer member 45 are removed from the traveling carriage, and the traveling carriage is circled between the conveyor belt 1 and the inner wall. It is inserted along the circumferential direction and the conveyor belt 1 is positioned around the center. next,
The upper bending members 43 and 44 and the spacer member 45 are fixed to the traveling carriage. Then, the vertical position of the clamp 48 is adjusted to clamp the conveyor belt 1 to the traveling carriage. Thus, the fixing of the conveyor belt 1 and the traveling carriage is completed.

Next, when the conveyor belt 1 is run to the left in FIG. 4, the cleaning device 40 runs integrally, and the wire brush 53 rubs the powder particles adhering to the inner wall so that they can be easily peeled off. The rear scraping member 52 scrapes the granular material and collects it in the space above the conveyor belt 1. When the cleaning device 40 reaches the vicinity of the opening of the gutter, the conveyor belt 1 is stopped and the collected powder and granules are dropped to a chute or the like below. In this way, the inner walls of the inner gutter and the outer gutter can be easily cleaned, and the remaining granular material can be easily collected. If the cleaning device 40 is lightweight, it may float during traveling and contact with the inner wall may become insufficient. Therefore, by placing a weight on the cleaning device 40, floating can be prevented.

When the cleaning device 40 is removed from the conveyor belt 1 after the cleaning operation, the procedure is the reverse of the above. That is, the vertical position of the clamp 48 is adjusted to release the fixation of the conveyor belt 1, and the upper curved members 43 and 44 and the spacer member 45 are removed from the traveling carriage. Next, after the traveling carriage between the conveyor belt 1 and the inner wall is moved in the circumferential direction and taken out, the bending members 43 and 44 and the spacer member 45 are returned to their original positions. Thus, the removal of the cleaning device 40 is completed.

Although the cleaning device 40 has a construction in which the conveyor belt 1 is clamped and fixed by the clamp 48, it has a high friction coefficient such as rubber or ceramic on the upper surfaces of the curved members 41 and 42 of the traveling carriage. Alternatively, a liner may be attached and a weight may be placed on the conveyor belt 1 and fixed by applying a load.

6 and 7 are schematic configuration diagrams showing another embodiment of the cleaning method according to the present invention. FIG. 6 is an overall configuration diagram of the conveyor device shown in FIG. 1. When performing a cleaning operation, one cleaning device 40 is fixed to the outward belt 1a near the opening on the head pulley 2 side of the inner gutter 10. ,
The other cleaning device 40 is fixed to the return belt 1b near the opening on the tail pulley 3 side of the outer gutter 20.

Therefore, in FIG. 7A, the cleaning device 40
After mounting the conveyor belt 1, the conveyor belt 1 is driven in the direction opposite to the traveling direction during the normal conveying operation, that is, in the direction in which the forward path belt 1a moves from the head pulley 2 to the tail pulley 3. Also in this case, the conveyor belt 1 is floated by air, but the traveling speed is set to be lower than that during normal conveyance. Then, as shown in FIG. 7 (b), the cleaning device 40 for the outward belt 1 a travels toward the tail pulley 3 while scraping the inner wall of the inner gutter 10, while the returning belt 1 a
The cleaning device 40 of b runs toward the head pulley 2 while scraping the inner wall of the outer gutter 20.

Next, referring to FIG. 7C, each cleaning device 40
When reaches the opening of the inner gutter 10 and the outer gutter 20, it is detected by the limit switch installed in each opening,
The motor 32 that drives the head pulley 2 is stopped. The granular material collected by the cleaning device 40 for the outward belt 1a is the inner gutter 1
It falls downward from the end portion of 0 and is collected on the return path belt 1b. Further, the powder particles collected by the cleaning device 40 for the return path belt 1b fall downward from the end portion of the outer gutter 20 and are collected by the chute 7.

Next, in FIG. 7D, each cleaning device 40
Is removed from the belt conveyor 1, and the head pulley 2
A scraper 60 having a scraping surface inclined with respect to the traveling direction is installed on the upper surface of the return path belt 1b in the vicinity. Next, the conveyor belt 1 is run in the same direction, and the powder particles collected on the return path belt 1b are conveyed to the head pulley 2 side. Next, in FIG. 7E, the powder particles on the return belt 1b collide with the scraper 60, are scraped to the side of the belt, and fall to the chute 7 below.

As described above, the granular material remaining on the outer gutter 20 is collected by the chute 7 by the cleaning device 40, while the granular material remaining on the inner gutter 10 is temporarily put on the return belt 1b by another cleaning device 40. After being collected, it is conveyed to the chute 7 side by the return belt 1b and collected.

If the cleaning device 40 travels only once and the cleaning is insufficient, as shown in FIG.
Each of the cleaning devices 40 removed in (d) is transferred and fixed to the outward belt 1a and the backward belt 1b. Next, in FIG. 7 (g), as in FIG. 7 (b), the cleaning device 40 for the outward belt 1a removes the inner wall of the inner gutter 10 while scraping the tail pulley 3a.
Traveling toward the other side, while cleaning device 4 for return belt 1b
No. 0 runs toward the head pulley 2 while scraping the inner wall of the outer gutter 20 to be in the state of FIG. 7 (c). Similarly, the powder particles of the inner gutter 10 are collected on the return path belt 1 b, and the powder particles of the return path belt 1 b are collected by the chute 7.

Thereafter, similarly to the above, the powder particles collected on the return belt 1b are scraped off by the scraper 60 and collected by the chute 7.

FIG. 8 is a perspective view showing an example of a drive device for the head pulley 2. The head pulley 2 rotates in a direction indicated by a broken line during a normal carrying operation, and rotates in a direction indicated by a solid line during the above-described cleaning work. The rotary shaft 61 of the head pulley 2 is connected to a speed reducer 62, and the speed reducer 62 is driven by a motor 32 of double shaft specifications via a coupling 63. The shaft of the motor 32 is connected to a recovery motor 66 with a speed reducer 65 via a clutch 64 that operates electrically or manually.

In the drive device thus constructed, the motor 32 is turned on and the clutch 6
4 and the recovery motor 66 are turned off, the speed reducer 62 reduces the speed, and the traveling speed of the belt conveyor 1 is, for example, 30.
It is set to about 0 m / min. On the other hand, during the cleaning work, the motor 32 is off and the clutch 64 and the recovery motor 6 are
6 is turned on, the two speed reducers 62 and 65 reduce the speed,
The belt conveyor 1 is set to run in the opposite direction at a speed of about 10 m / min, for example.

FIG. 9 is a sectional view showing another example of a conveyor device to which the present invention can be applied. With this conveyor system,
The inner gutter 10 is composed of a curved member that vertically divides a cylinder and a flat member that covers the upper portion thereof, and the outer gutter 20 cuts a part of the cylinder in the longitudinal direction, and the cut surface is used as the curved member of the inner gutter 10. It is fixedly configured. The outward belt 1a is arranged on the lower inner wall of the inner gutter 10 and the duct 11 is installed on the lower portion of the outer wall thereof. The outward path belt 1 a is floated by the compressed air ejected from the large number of communication holes 12. On the other hand, a return belt 1b is arranged on the lower inner wall of the outer gutter 20 and a duct 21 is installed on the lower portion of the outer wall thereof. The return belt 1b floats by the compressed air ejected from the large number of communication holes 22.
Also in the conveyor device having such a configuration, the cleaning device 40 described above is used in the forward belt 1a and the backward belt 1b.
By fixing and running the inner gutter 10 and the outer gutter 20, the cleaning and collecting work of the inner gutter 10 and the outer gutter 20 can be easily performed.

FIG. 10 is a sectional view showing another example of the conveyor device to which the present invention can be applied. In this conveyor device, only the outward belt 1a is supported by the air floating type. The inner gutter 10 is a hollow cylindrical member, and the outward belt 1a is arranged on the inner wall of the lower part thereof, and the duct 11 is formed on the lower part of the outer wall thereof.
Is installed. The outward path belt 1 a is floated by the compressed air ejected from the large number of communication holes 12. On the other hand, the return belt 1b is supported by a large number of support rollers 25. Even in a conveyor device having such a configuration,
By fixing the above-described cleaning device 40 to the outward belt 1a and running the cleaning device 40, the cleaning work of the inner gutter 10 can be easily performed.

In the above description, an example in which the inner gutter 10 and the outer gutter 20 are closed tubular is shown, but at least one of the inner gutter 10 and the outer gutter 20 has an original gutter shape with an open upper part. However, the present invention can be similarly applied.

[0043]

As described above in detail, according to the present invention, the traveling carriage having the scraping member can be driven by the conveyor belt, so that the collecting and cleaning operation of the powder particles remaining in the gutter is simple. Can be carried out. Further, the cleaning work stabilizes the traveling of the conveyor belt. Further, all the powder particles remaining in the inner gutter and the outer gutter can be collected in the chute on the head pulley side.

Further, according to the cleaning device of the present invention, a special driving device such as a wire is not required, and the work of collecting and cleaning the powdery particles becomes easy. Further, since the traveling carriage is provided with the brush, the efficiency of collecting the powdery particles by the scraping member is improved.

In this way, it is possible to efficiently collect the powder particles attached to the inner wall of the gutter guiding the conveyor belt.

[Brief description of drawings]

1 is an overall schematic view showing a configuration of a conveyor device according to the present invention, FIG. 1 (a) is a partially cutaway plan view, and FIG. 1 (b).
Is a partially cutaway front view.

2 (a) is a sectional view taken along line A1-A1 in FIG. 1 (b), and FIG. 2 (b) is a cutaway perspective view of a portion A2 in FIG. 1 (b). .

FIG. 3 is a plan view showing an embodiment of the present invention.

FIG. 4 is a cross-sectional view taken along the line A3-A3 in FIG.

FIG. 5 is a side view showing an embodiment of the present invention.

FIG. 6 is a schematic configuration diagram showing another embodiment of the cleaning method according to the present invention.

FIG. 7 is a schematic configuration diagram showing another embodiment of the cleaning method according to the present invention.

8 is a perspective view showing an example of a drive device for the head pulley 2. FIG.

FIG. 9 is a cross-sectional view showing another example of a conveyor device to which the present invention can be applied.

FIG. 10 is a sectional view showing another example of a conveyor device to which the present invention can be applied.

[Explanation of symbols]

 1 Conveyor Belt 1a Outgoing Belt 1b Returning Belt 2 Head Pulley 3 Tail Pulley 4 Inlet 7 Chute 10 Inner Gutter 11, 21 Duct 12, 22 Communication Hole 20 Outer Gutter 31 Inspection Window 33 Blower Device 40 Cleaning Device 41, 42, 43, 44 Curved member 45 Spacer member 46 Connection member 47 Traveling roller 48 Clamp 52 Scraping member 53 Wire brush

Claims (4)

[Claims] 1. A cleaning method for a conveyor device, wherein a conveyor belt is run along the lower inner wall of a gutter, and pressurized gas is supplied between the conveyor belt and the gutter to float the conveyor belt. After fixing a traveling carriage having a removing member to a conveyor belt, the traveling carriage is caused to travel by traveling of the conveyor belt, and the powder and granular material adhered to the inner wall of the gutter is scraped and collected to clean the conveyor device. Method. 2. A conveyor belt is stretched between a head pulley and a tail pulley, and the conveyor belt is run along the lower inner walls of the inner gutter and the outer gutter arranged around the inner gutter, In a method of cleaning a conveyor device in which a pressure gas is supplied between an inner gutter and an outer gutter to float a conveyor belt, a traveling carriage having a scraping member for scraping an inner wall of the gutter is provided near an opening of the inner gutter on a head pulley side. The process of fixing to the conveyor belt of, and driving the conveyor belt to run the traveling carriage toward the tail pulley side, scrape the powder particles adhering to the inner wall of the inner gutter, and collect it on the conveyor belt of the outer gutter. And a step of further moving the conveyor belt in the same direction to convey the powder particles collected on the conveyor belt of the outer gutter to the head pulley side and collect the powder particles. Cleaning method for conveyor equipment. 3. A cleaning device for a conveyor device, comprising: running a conveyor belt along a lower inner wall of a gutter and supplying pressurized gas between the conveyor belt and the gutter to levitate the conveyor belt, for scraping the inner wall of the gutter. A scraping member, a traveling carriage mounted with the scraping member and traveling along the inner wall of the gutter, and a fixing means for fixing the conveyor belt and the traveling carriage to the conveyor device. Cleaning device. 4. The cleaning device for a conveyor device according to claim 3, wherein the traveling carriage is provided with a brush for rubbing the inner wall of the gutter in front of the scraping member in the traveling direction.