Slip Powder Coating Device for Floating Belt Conveyor

Abstract

To provide a sliding powder application device of a floating type belt conveyor which enables a belt floating in a belt pivotally supporting trough to stably travel.SOLUTION: A sliding powder application device 50 of a floating type belt conveyor comprises: a loop-like belt 12 which is laid between a head pulley 49 and a tail pulley 45; and cylindrical belt pivotally supporting troughs 20, 30 which are arranged in the conveyance direction of the belt 12. The sliding powder application device 50 of the floating type belt conveyor is arranged in a floating type belt conveyor 10 which floats the belt 12 on a lower inner peripheral surface of the belt pivotally supporting troughs 20, 30 to travel, applies sliding powder 51 to a belt surface opposed to the lower inner peripheral surface, and includes application means 52A, 52B which applies the sliding powder 51 via a rotator that is driven by being in contact with the belt surface opposed to the lower inner peripheral surface on the inlet side of the belt pivotally supporting troughs 20, 30.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a slip powder applying device for a floating belt conveyor that is arranged on a floating belt conveyor that floats and runs a belt in a belt support trough and supplies slip powder to a belt surface facing the lower inner peripheral surface of the belt support trough.

Background Art

[0002] Conventionally, as a belt conveyor for conveying an object to be conveyed, a floating belt conveyor that conveys the belt in a floating state by supplying gas to the lower surface of the belt has been used. This floating belt conveyor has less wear due to sliding between the roller and the belt compared to a roller type belt conveyor, and the belt can be made to have a longer life. However, the gap between the lower inner peripheral surface of the belt support trough (hereinafter sometimes simply referred to as the trough) that floats the belt and the belt is only about several millimeters, and the belt and the lower inner peripheral surface may come into local contact for some reason during conveyance. Then, the belt may wear and the running resistance and frictional resistance may increase. Therefore, in order to reduce the frictional resistance generated when driving the belt inside the trough, slip powder is applied to the belt surface facing the lower inner peripheral surface of the trough. As a specific method of supplying the slip powder, fine powder, a low friction body, etc. are mixed into the gas supplied to the lower surface of the belt, and the sliding resistance and frictional resistance between the belt and the lower inner peripheral surface are reduced by the mixed gas. (For example, see Patent Document 1)

[0003] However, in the method of mixing and supplying fine powder etc. into the gas, unevenness may occur in the fine powder adhering to the belt surface, and it may not contribute to reducing the frictional resistance. In addition, there is a risk that the adhesion efficiency to the belt surface with respect to the application amount of the fine powder is poor.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0005] In view of the problems of the above prior art, the problem to be solved by the present invention is to provide a slip powder coating device for a floating belt conveyor that can reduce the frictional resistance of a belt floating in a belt support trough and enable stable running. Another object is to provide a slip powder coating device for a floating belt conveyor that can efficiently apply slip powder.

MEANS FOR SOLVING THE PROBLEMS

[0006] As a first means for solving the above problems, the present invention includes a loop-shaped belt wound around a head pulley and a tail pulley, and a cylindrical belt support trough disposed in the conveying direction of the belt. The floating belt conveyor is arranged to float and run the belt on the lower inner peripheral surface of the belt support trough, and is a slip powder coating device for a floating belt conveyor that applies slip powder to the belt surface facing the lower inner peripheral surface. There is provided a slip powder coating device for a floating belt conveyor, characterized in that it includes coating means for applying the slip powder through a rotating body that contacts and is driven by the belt surface facing the lower inner peripheral surface on the inlet side of the belt support trough. According to the first means, the slip powder can be efficiently applied by directly (physically) contacting the belt surface facing the lower inner peripheral surface of the belt support trough. Therefore, stable running with reduced frictional resistance of the belt floating in the belt support trough can be achieved. In addition, the slip powder can be applied to the belt surface with an inexpensive and simple configuration without using a new drive source.

[0007] As a second means for solving the above problems, in the first means, the coating means for coating from the lower surface side of the belt includes a brush that contacts the lower surface of the belt and rotates passively to apply the slip powder, and a casing that surrounds along the outer periphery of the brush and stores the slip powder inside and contacts the rotating brush to provide a slip powder coating device for a floating belt conveyor, characterized in that it is provided with the casing. According to the above second means, due to the simple configuration of the brush that contacts and rotates passively on the lower surface of the running belt, the slip powder can be applied by directly (physically) contacting the belt surface.

[0008] As a third means for solving the above problems, in the first or second means, the coating means for coating from the upper surface side of the belt includes a brush that contacts and rotates passively on the upper surface of the belt and rubs and applies the slip powder on the upper surface of the belt, a rotating drum that rotates through a rotational motion transmission part that transmits the rotational motion of the brush and sprays a predetermined amount of the slip powder on the upper surface of the belt, and a hopper that supplies the slip powder to the rotating drum, to provide a slip powder coating device for a floating belt conveyor, characterized in that it is provided with the hopper. According to the above third means, due to the simple configuration of the brush that contacts and rotates passively on the upper surface of the running belt, the slip powder can be applied by directly (physically) contacting the belt surface.

[0009] As a fourth means for solving the above problems, in the first or second means, the coating means for coating from the upper surface side of the belt includes a driven roller that contacts and rotates passively on the upper surface of the belt, a spraying roller that sprays a predetermined amount of the slip powder on the upper surface of the belt through a rotational motion transmission part that transmits the rotational motion of the driven roller, a hopper that supplies the slip powder to the spraying roller, and a coating part that rubs and applies the slip powder on the upper surface of the belt, to provide a slip powder coating device for a floating belt conveyor, characterized in that it is provided with the coating part. According to the fourth means described above, by the configuration of the roller that contacts and is driven by the upper surface of the running belt, slip powder can be sprayed on the upper surface of the belt and applied directly (physically) by contact with a mop serving as the application part.

[0010] As a fifth means for solving the above problems, the present invention provides a slip powder application device for a floating belt conveyor, characterized in that in any one of the second to fourth means, lifting means for bringing the rotating body of the application means into contact with or out of contact with the belt surface is provided. According to the fifth means described above, it is possible to switch between the application of slip powder and the stop of application.

Effects of the Invention

[0011] According to the present invention, slip powder can be efficiently applied by directly (physically) contacting the belt surface facing the lower inner peripheral surface of the belt support trough. Therefore, stable running with reduced frictional resistance of the belt floating in the belt support trough can be achieved. In addition, slip powder can be applied to the belt surface with an inexpensive and simple configuration without using a new drive source.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0013] An embodiment of a lubricant powder coating device for a floating belt conveyor of the present invention will be described in detail below with reference to the drawings.

[0014] [Floating Belt Conveyor 10] FIG. 1 is a schematic side view showing a floating belt conveyor. FIG. 2 is a cross-sectional view taken along line A-A' of FIG. 1. Note that the floating belt conveyor in the present embodiment shown in FIG. 1 is exemplified as one equipped with a so-called belt reversing device, but the present invention can also be applied even when it is not equipped with such a device. As shown in FIGS. 1 and 2, a floating belt conveyor (hereinafter sometimes simply referred to as a belt conveyor) 10 provided with a lubricant powder coating device according to the present embodiment mainly includes a pair of upper and lower cylindrical carrier side belt support troughs (hereinafter sometimes referred to as carrier troughs) 20 and a U-shaped cylindrical return side belt support trough (hereinafter sometimes referred to as a return trough) 30, and a loop-shaped (endless) belt 12 arranged so as to pass through these carrier troughs and return troughs 20 and 30.

[0015] The floating belt conveyor 10 ejects gas such as compressed air from gas injection holes 21 and 31 (see FIG. 2) formed at predetermined intervals along the running direction of the belt 12, for example, below the carrier trough and the return trough 20 and 30, so that the curved lower inner peripheral surfaces 21a and 31a of the carrier trough and the return trough 20 and 30 and the lower surface of the belt 12 are separated from each other, and the belt 12 is run in a floating state. Below the gas injection holes 21 and 31, gas ducts 24 and 34 extending in the running direction of the belt 12 are arranged, and air supply pipes 25 and 35 are connected to the respective gas ducts 24 and 34. Gas such as compressed air is supplied to the air supply pipes 25 and 35 from a gas supply device (not shown). The gas supplied from the gas injection holes 21 and 31 into the internal spaces of the respective troughs 20 and 30 is discharged to the outside through exhaust pipes 26 and 36 provided in the respective troughs 20 and 30. Further, the floating belt conveyor 10 is provided with belt bending guide devices 40 for bending the flat belt 12 into a U-shaped (arc-shaped) cross-sectional shape on the inlet and outlet sides of the belt 12 at the respective ends of the carrier trough and the return trough 20, 30.

[0016] The belt bending guide device 40 is installed to prevent, for example, both end portions in the width direction of the belt 12 from being strongly rubbed against the respective lower inner peripheral surfaces 21a, 31a when the belt 12 becomes flat within the carrier trough and the return trough 20, 30, resulting in uneven wear of the belt 12 and the lower inner peripheral surfaces 21a, 31a. Furthermore, the floating belt conveyor is provided with a belt reversing device (hereinafter sometimes simply referred to as a reversing device) 42 for reversing the front and back surfaces of the belt 12 at the start and end of the return trough 30. The floating belt conveyor 10 is also provided with a supply side chute cover 44 and a tail pulley 45 on the supply port 43 side of the conveyed material, and an end cover 47, a discharge side chute cover 48, and a head pulley 49 on the discharge port 46 side of the conveyed material.

[0017] [Slip powder coating device 50] The slip powder coating device 50 includes coating means 52 for applying slip powder through a rotating body that contacts and is driven by the belt surface facing the lower inner peripheral surface on the inlet side of the belt support trough. (Mounting position of the slip powder coating device 50) FIG. 3 is an explanatory diagram of the mounting position of the slip powder coating device. The slip powder coating devices 50 attached to the carrier side belt support trough 20 and the return side belt support trough 30 are both attached to the belt surface side facing the lower inner peripheral surface of the trough. The specific mounting positions are as follows. The floating belt conveyor 10 shown in FIG. 3(1) has a configuration including a reversing device 42, and the slip powder coating device 50 is attached to the lower belt surface side at the inlet of the carrier side belt support trough 20 and the upper belt surface in front of the reversing device 42 at the inlet of the return side belt support trough 30. The floating belt conveyor 10 shown in FIG. (2) is configured with a reversing device 42, and the slip powder coating device 50 is attached only to the upper surface of the belt in front of the reversing device 42 on the inlet side of the return side belt support trough 30. The floating belt conveyor 10A shown in FIG. (3) is not configured with a reversing device, and the slip powder coating device 50 is attached to the lower surface side of the belt in front of the inlet of the carrier side belt support trough 20 and the lower surface side of the belt in front of the inlet of the return side belt support trough 30. In addition, it may be configured to be attached only to the lower surface side of the belt in front of the inlet of the carrier side belt support trough 20.

[0018] The coating means of the present invention includes a configuration (52A) for coating from the lower surface side of the belt and configurations (52B, 52C) for coating from the upper surface side of the belt. (Coating means 52A from the lower surface side of the belt) FIG. 4 is an explanatory view of the coating means for applying slip powder from the lower surface side of the belt. The coating means 52A for coating from the lower surface side of the belt 12 includes a brush 54 that contacts the lower surface of the belt 12 and is driven to apply the slip powder 51, and a casing 55 that surrounds along the outer periphery of the brush 54 and stores the slip powder 51 inside and brings the slip powder into contact with the rotating brush 54. The brush 54 that serves as a rotating body is a rotating brush having substantially the same length as the width direction of the belt 12, and is attached across the direction orthogonal to the longitudinal direction of the belt 12. The tip of the brush hair of the brush 54 is arranged to contact the belt surface with a predetermined pressure, and during the running of the belt 12, the brush 54 whose brush hair contacts the belt surface is driven to rotate. The casing 55 surrounds the outer periphery of the brush 54 in a U-shape in cross-sectional view, and is arranged across the width direction of the belt 12 so that the upper opening faces the lower surface of the belt. The inner peripheral surface of the lower part of the casing 55 is set so that the brush hair of the brush 54 contacts it, and is filled with the slip powder 51 inside. In the coating means 52A configured as such, while the belt 12 is running, the brush 54 whose brush tips contact the lower surface of the belt rotates passively. The brush 54 rotating within the casing 55 surrounding the outer periphery contacts the lubricant powder 51 with its brush tips on the lower inner peripheral surface of the casing 55, and the lubricant powder 51 adheres thereto. The brush tips to which the lubricant powder 51 has adhered can directly (physically) contact the upper surface of the belt above and apply the lubricant powder 51.

[0019] (Coating means 52B from the upper surface side of the belt) FIG. 5 is an explanatory diagram of the coating means for applying the lubricant powder from the upper surface side of the belt. The coating means 52B for applying from the upper surface side of the belt 12 includes a brush 54 that contacts the upper surface of the belt 12 and rotates passively to rub and apply the lubricant powder 51 onto the upper surface of the belt, a rotating drum that rotates via a rotational motion transmission unit 56 that transmits the rotational motion of the brush 54 and serves as a spraying roller 57 for spraying a predetermined amount of the lubricant powder onto the upper surface of the belt 12, and a hopper 58 for supplying the lubricant powder to the rotating drum. The brush 54 serving as a rotating body is a rotary brush having substantially the same length as the width direction of the belt 12, and is attached so as to straddle in a direction orthogonal to the longitudinal direction of the belt 12. The brush tip of the brush 54 is arranged to contact the belt surface with a predetermined pressure, and while the belt 12 is running, the brush 54 whose brush tips contact the belt surface rotates passively. The rotating drum serving as the spraying roller 57 is a drum that is arranged in front of the brush 54 in the conveying direction of the belt 12 and supplies the lubricant powder 51 that falls from the hopper 58 storing the lubricant powder 51 arranged above, little by little, onto the upper surface of the belt 12 while rotating. The rotating drum and the brush 54 are connected via a rotational motion transmission unit 56 that transmits the rotational motion of the brush 54. The rotational motion transmission unit 56 is composed of a combination of gears, chains, and gears, etc., and transmits the rotational motion of the brush 54 to the rotating drum. In the coating means 52B configured as described above, while the belt 12 is running, the brush 54 whose bristles contact the upper surface of the belt rotates passively. The rotary drum also rotates via the rotary motion transmission unit 56 that transmits the rotary motion of the brush 54, and a predetermined amount of slip powder 51 is scattered onto the upper surface of the belt. The brush 54 disposed behind the rotary drum in the conveyance direction of the belt 12 can rub and apply the slip powder 51 onto the upper surface of the belt.

[0020] FIG. 6 is an explanatory view of a modified example of the coating means for applying the slip powder from the upper surface side of the belt. The coating means 52C for applying from the upper surface side of the belt in the modified example includes a driven roller 59 that contacts and is driven on the upper surface of the belt 12, a spraying roller 57 that sprays a predetermined amount of slip powder 51 onto the upper surface of the belt 12 via a rotary motion transmission unit 56 that transmits the rotary motion of the driven roller 59, a hopper 58 that supplies the slip powder 51 to the spraying roller 57, and a mop 60 that serves as a coating part for rubbing and applying the slip powder 51 onto the upper surface of the belt. The driven roller 59 that is a rotating body is a cylindrical body having substantially the same length as the width direction of the belt 12, and is attached so as to straddle in a direction orthogonal to the longitudinal direction of the belt 12. The outer peripheral surface of the driven roller 59 is arranged to contact the belt surface with a predetermined pressure, and while the belt 12 is running, the driven roller 59 whose outer peripheral surface contacts the belt surface rotates passively. The spraying roller 57 shown in FIG. 6 is a roller provided with uneven portions that is arranged behind the driven roller 59 in the conveyance direction of the belt 12 and supplies a predetermined amount of the slip powder 51 that falls from the hopper 58 storing the slip powder 51 disposed above while rotating onto the upper surface of the belt 12. This roller has uneven portions on its surface, and when the slip powder 51 passes through the hopper 58 on the roller, the uneven portions are filled with the slip powder 51, and when it rotates downward facing the surface of the belt 12, the slip powder falls from the uneven portions and can be scattered onto the belt 12 in predetermined amounts. The spraying roller 57 and the driven roller 59 are connected via a rotary motion transmission unit 56 that transmits the rotary motion of the driven roller 59. The rotary motion transmission unit 56 is composed of a combination of gears, chains, gears, etc., and transmits the rotary motion of the driven roller 59 to the spraying roller 57. The mop 60 serving as the coating section is arranged behind the spraying roller 57 in the conveying direction of the belt 12, contacts the upper surface of the belt 12 with a predetermined pressure, and is a member that stretches and applies the slip powder 51 onto the upper surface of the belt. The mop 60 is made of a material having a predetermined elastic force such as corduroy cloth, a puff with a raised surface, a sponge, or a plastic resin, and can stretch the slip powder 51 without damaging the upper surface of the belt 12 when contacting it. In the coating means 52C configured as described above, during the running of the belt 12, the driven roller 59 that contacts the upper surface of the belt rotates in a driven manner. The spraying roller 57 also rotates via the rotational motion transmission section 56 that transmits the rotational motion of the driven roller 59, and a predetermined amount of the slip powder 51 is sprayed onto the upper surface of the belt. The mop 60 arranged behind the spraying roller 57 in the conveying direction of the belt 12 can stretch and apply the slip powder 51 onto the upper surface of the belt. Note that although the spraying roller 57 shown in FIG. 5 has been described in terms of the configuration of a rotating drum, it is not limited to this as long as it can spray a predetermined amount while rotating. For example, as shown in FIG. 6, uneven portions may be formed on the outer peripheral surface of the roller, the slip powder falling from the hopper 58 may be filled in the recesses, and the roller may be configured to drop the slip powder from the recesses during rotation. In addition to the mop 60 that stretches and applies the slip powder 51 onto the upper surface of the belt, a configuration may also be adopted in which the slip powder 51 is stretched and applied by a brush that is driven by the contact of the brush tips with the belt surface.

[0021] (Lifting means of the coating means) FIG. 7 is an explanatory view of the elevating means of the coating means. As shown in the figure, the elevating means 70 includes a telescopic mechanism that brings the rotating bodies of the coating means 52A, 52B, and 52C into contact with or out of contact with the belt surface. The specific elevating means 70 is composed of, for example, a rod with one of the coating means 52A, 52B, or 52C (the figure shows an example with the coating means 52A attached, and in the case of the coating means 52B or 52C, it is shown by a dotted line) attached to its tip and a cylinder. It has a first telescopic member 72 that moves the rod horizontally in a telescopic manner, and a second telescopic member 74 that is composed of a rod to which the first telescopic member 72 is attached and a cylinder, and moves the rod vertically in a telescopic manner. The elevating means 70 is arranged on the side of the conveyor belt 12 where the coating means 52A, 52B, and 52C are arranged. Note that the elevating means 70 may use a drive source such as an electric type, a hydraulic type, or a compressed air type, or may be a manual type using a telescopic and a jack. In the case of the coating means 52A that applies the slip powder 51 from the lower surface side of the belt 12, such an elevating means 70 with such a configuration arranges the coating means 52A on the upper surface of the tip of the rod of the first telescopic member 72. When applying the slip powder 51, extend the first telescopic member 72 to arrange the coating means 52A on the lower surface of the belt 12, and further extend the second telescopic member 74 so that the brush 54, which is the rotating body of the coating means 52A, contacts the lower surface of the belt with a predetermined pressure. On the other hand, when not applying the slip powder 51, contract the second extension member 74 to separate the rotating body of the coating means 52A from the lower surface of the belt. Also, when replenishing the slip powder 51 and performing maintenance such as inspection and repair, contract the first and second telescopic members 72 and 74 to arrange the coating means 52A on the side of the belt 12 and then perform the operations. In the case of the coating means 52B and 52C that apply the slip powder 51 from the upper surface side of the belt 12, arrange the coating means 52B and 52C on the lower surface of the tip of the rod of the first telescopic member 72. When applying the slip powder 51, extend the first telescopic member 72 to arrange the coating means 52B and 52C on the upper surface of the belt 12, and further contract the second telescopic member 74 so that the rotating bodies of the coating means 52B and 52C contact the upper surface of the belt with a predetermined pressure. On the one hand, when not applying the lubricant powder 51, the second telescopic member 74 is extended (and further the first telescopic member 72 is contracted) to separate the rotating bodies of the applying means 52B and 52C from the upper surface of the belt. Also, when replenishing the lubricant powder 51 or performing maintenance such as inspection and repair, the second telescopic member 74 is extended, the first telescopic member 72 is contracted, and the applying means 52B and 52C are arranged on the side of the belt 12 before proceeding.

[0022] The lubricant powder applying device of the present invention may have a configuration combined with a belt cleaning device. [Belt cleaning device on the side opposite to the surface of the belt on which the conveyed object is placed] FIG. 8 is an explanatory view of the belt cleaning device. As shown in the figure, in the belt cleaning device, the floating belt conveyor 10 to which the second cleaning means 80 is attached includes a reversing device 42 and a first cleaning means 90 for cleaning the belt on the conveyed object placement surface of the belt 12. The second cleaning means 80 is attached in front of the reversing device 42 on the inlet side of the return side belt supporting trough 30, that is, on the side facing the lower inner peripheral surface of the belt supporting trough, which is the side opposite to the conveyed object placement surface of the belt 12. The second cleaning means 80 includes a scraper 82 for scraping off the deposits adhering to the belt surface, a cleaning nozzle 84 for spraying cleaning water onto the belt surface, and a tension roller 86 located between the first cleaning means 90 and the second cleaning means 80 and applying tension to the belt surface to stretch the belt by sandwiching the belt 12 from both sides. The second cleaning means 80 configured as described above can scrape off the deposits on the side opposite to the conveyed object placement surface of the belt 12 in front of the reversing device 42 on the inlet side of the return side belt supporting trough 30 with the belt surface under tension by the tension roller 86 using the scraper 82 and wash them away with the cleaning water from the cleaning nozzle 84. Then, with the belt surface under tension by the tension roller 86, the deposits can be scraped off by the scraper 92 of the first cleaning means 90 attached to the conveyed object placement surface side of the belt 12 and washed away with the cleaning water from the cleaning nozzle 94. The scraped or washed-away deposits are discharged to the outside together with the cleaning water from the water collecting chute 96. As a result, compared with the conventional configuration in which the frictional resistance of the belt 12 cannot be reduced in a combination where the belt surface on which the return-side belt support trough 30 travels is inverted using the reversing device 42 in front or the deposits on the conveyance placement surface of the belt 12 are cleaned by the first cleaning means 90, the frictional resistance of the belt 12 can be surely reduced by removing the deposits on the surface facing the lower inner peripheral surface of the belt support trough. In addition, the second cleaning means 80 can sufficiently clean the opposite surface of the belt 12 even in a configuration including only the scraper 82 in addition to the configuration combining the scraper 82 and the cleaning nozzle 84. Also, by arranging at least one of the tension rollers 86 between the scraper 82 and the scraper 92 to adjust the tension, the pressing force for pressing the scraper 82 and the scraper 92 against the belt 12 can be adjusted and controlled to different pressing forces. When the slip powder application device and the cleaning device are used in combination, it is desirable to provide the slip powder application device behind the cleaning device of the belt 12 to apply the slip powder.

[0023] According to such a present invention, the slip powder can be efficiently applied in direct (physical) contact with the belt surface facing the lower inner peripheral surface of the belt support trough. Therefore, stable running with reduced frictional resistance of the belt floating in the belt support trough can be realized. Also, the slip powder can be applied to the belt surface with an inexpensive and simple configuration without using a new drive source. The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments at all, and various modifications are possible without departing from the gist of the present invention. Also, the present invention is not limited to the combinations shown in the embodiments, and can be implemented by various combinations.

Explanation of Reference Numerals

[0024] 10 Floating belt conveyor 12 Belt 20 Carrier-side belt support trough 21 Gas injection hole 21a Lower inner peripheral surface 24 Gas duct 25 Air supply pipe 26 Exhaust pipe 30 Return side belt support trough 31 Gas injection hole 31a Lower inner peripheral surface 34 Gas duct 35 Air supply pipe 36 Exhaust pipe 40 Belt bending guide device 42 Belt reversing device 43 Supply port 44 Supply side chute cover 45 Tail pulley 46 Discharge port 47 End cover 48 Discharge side chute cover 49 Head pulley 50 Slip powder coating device 51 Slip powder 52A, 52B, 52C Coating means 54 Brush 55 Casing 56 Rotary motion transmission part 57 Spraying roller 58 Hopper 59 Driven roller 60 Mop 70 Lifting means 72 First telescopic member 74 Second telescopic member 80 Second cleaning means 82 Scraper 84 Cleaning nozzle 86 Tension roller 90 First cleaning means 92 Scraper 94 Cleaning nozzle 96 Water collecting chute

Claims

1. A floating belt conveyor disposed on a loop-shaped belt stretched between a head pulley and a tail pulley and having a cylindrical belt support trough disposed in the conveying direction of the belt, the floating belt conveyor floating and running the belt on the lower inner peripheral surface of the belt support trough, and a lubricant application device for the floating belt conveyor that applies lubricant powder to the belt surface facing the lower inner peripheral surface, The lubricant application device for the floating belt conveyor is characterized in that it includes an application means for applying the lubricant powder through a rotating body that is in contact with and driven by the belt surface facing the lower inner peripheral surface on the inlet side of the belt support trough.

2. The lubricant application device for the floating belt conveyor according to Claim 1, The application means for applying from the lower surface side of the belt includes a brush that is in contact with the lower surface of the belt and is driven to rotate to apply the lubricant powder, and a casing that surrounds along the outer periphery of the brush and stores the lubricant powder inside and brings the lubricant powder into contact with the rotating brush. The lubricant application device for the floating belt conveyor is characterized by this.

3. The lubricant application device for the floating belt conveyor according to Claim 1 or 2, The application means for applying from the upper surface side of the belt includes a brush that is in contact with and driven by the upper surface of the belt to rub and apply the lubricant powder to the upper surface of the belt, a rotating drum that rotates through a rotational motion transmission unit that transmits the rotational motion of the brush and sprays a predetermined amount of the lubricant powder onto the upper surface of the belt, and a hopper that supplies the lubricant powder to the rotating drum. The lubricant application device for the floating belt conveyor is characterized by this.

4. The lubricant application device for the floating belt conveyor according to Claim 1 or 2, The application means for applying from the upper surface side of the belt includes a driven roller that is in contact with and driven by the upper surface of the belt, a spraying roller that sprays a predetermined amount of the lubricant powder onto the upper surface of the belt through a rotational motion transmission unit that transmits the rotational motion of the driven roller, a hopper that supplies the lubricant powder to the spraying roller, and an application unit that rubs and applies the lubricant powder to the upper surface of the belt. The lubricant application device for the floating belt conveyor is characterized by this.

5. The lubricant application device for the floating belt conveyor according to any one of Claims 2 to 4, The lubricant application device for the floating belt conveyor is characterized by including a lifting means for bringing the rotating body of the application means into contact with or out of contact with the belt surface.

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