JP5712450B1 - Belt cleaner - Google Patents

Abstract

Provided is a belt cleaner that eliminates dust accumulation on chip sticks and prevents dust from entering between chip sticks and has a highly efficient scraping performance over a long period of time. In a belt cleaner in which chip sticks each having a chip attached to a tip of a rectangular rod-shaped rubber elastic body or a strip-shaped metal plate spring are arranged, strip-shaped dustproof sheets 40 and 41 are attached to the chip stick. Thus, dust intrusion into the gap between the chip sticks is prevented, and a plurality of strips are formed by inserting cuts 40b and 41b into the end portion of one dustproof sheet. By fixing to the elastic body 22 or the strip-shaped metal plate spring 23, a dust-proof sheet having no opening other than the notch was obtained. [Selection] Figure 2

Description

  The present invention relates to a belt cleaner that scrapes off deposits adhering to the belt surface of a belt conveyor used for transporting raw materials.

Since belt conveyors are the most efficient mass transport means, many belt conveyors are used to transport various raw materials, fuels, processed materials, wastes and the like. In general, a belt conveyor is configured such that a rubber belt having a predetermined width is wound endlessly between a drive pulley and a driven pulley, and the belt is rotated between both pulleys by rotating the drive pulley. Normally, the transported material is transported on a carrier belt (conveying belt), is discharged on the drive pulley side, becomes a return belt (returning side belt), and returns to the driven pulley. ) Dropped on the way and accumulated under the belt. In addition, there are problems that the return roller and the carrier roller are worn or that the belt adheres to the roller and causes the belt to meander.

When the conveyed product adheres to the belt, the adhering material on the surface of the return belt falls and accumulates under the belt, but it tends to selectively fall and accumulate particularly under the snap pulley, tension pulley, and return roller. If the deposit is left unattended, it grows up to the position of the return roller and the return belt and wears them. In addition, since leaving the fallen object causes a deterioration of the work environment and resource loss, the fallen object is regularly collected. However, since it falls over the entire length of the belt, a great deal of labor and cost is required. It depends. Also, the falling ore recovery work is difficult to mechanize, and it is necessary to rely on human power, which is a repetition of 3K work. The fallen fallen object may be collected and reused. However, since it is necessary to screen with earth and sand or pebbles and the cost is high, it is often discarded and wastes resources. For this reason, a method has been adopted in which a fallen object is scraped off at a fixed location using a belt cleaner as much as possible to recover efficiently. There are two types of belt cleaners: a scraper type that presses a fixed scraping plate against the belt to scrape off deposits with a scraper, a brush method that makes the brush contact the belt, and a cleaning method that removes deposits by spraying high-pressure fluid. However, a scraper method with a simple structure and excellent maintainability is often used.

The conveyor belt gradually wears as it is used, but it does not wear uniformly, but the central portion selectively wears greatly. Therefore, when the belt becomes old, a thickness difference of 5 to 6 mm occurs at the central portion and the end portion of the belt. In addition, when the belt length is longer than 100m, belt replacement may not be performed over the entire length due to cost and work time constraints, and the old belt with a large central wear is not worn. New belts may be mixed. The belt cleaner pressing adjustment to the belt with uneven wear is adjusted to the center portion where the wear is the largest, but the pressing force is uneven in the width direction of the belt. Further, the endless portion of the belt peels off over time, and the endless end portion peels off. Since the peeled portion protrudes from the belt surface, the belt cleaner may be damaged if the belt cleaner exceeds the bending limit, or the endless peeling may be promoted if the belt cleaner has a large pressing force, which causes belt damage. Therefore, the belt cleaner is an indispensable item for scraping off deposits on the surface of the belt, but if the proper installation or usage is wrong, the belt may be damaged, resulting in production failure. In order to maintain the scraping performance of the belt cleaner properly, it is best to adjust the contact pressure between the belt cleaner and the belt while observing the scraping status while the belt is operating. It was difficult. In this way, there are many issues that the belt cleaner must clear, and it is extremely difficult to deal with all issues in terms of the greatest common denominator. Up to now, belt cleaners of various shapes and functions have been proposed, but no belt cleaner with excellent maintenance and scraping efficiency has yet been realized.

The requirements for a scraper belt cleaner are as follows. (1) The deposits can be reliably scraped off over a long period of time. (2) It is easy to replace the chip. (3) The chip life of the scraping part is long and the adjustment cycle and replacement cycle are long. (4) No deposits adhere to the belt cleaner body or the amount of deposits is extremely small. (5) When the adherent is firmly attached to the belt or when the endless portion (connecting portion) of the belt is peeled off, the tip is greatly bent in the belt conveying direction to pass over these obstacles. This prevents damage to the belt cleaner. (6) The structure of the belt cleaner is simple and compact, and the belt cleaner can be easily attached and detached. A wide variety of belt cleaners have been proposed so as to satisfy the above characteristics, but each has a problem and a fundamental method has not been realized.

Japanese Patent Application Laid-Open No. 2013-252976, a belt cleaner in which a tip stick is formed by embedding an anchor portion in a free end portion of an elastic body made of rubber, and a plurality of chip sticks are arranged on a gantry arranged in the width direction of a return side belt However, there is a problem that there is no dustproof sheet, dust adheres to the surface of the chip stick, the friction of the sliding surface of the chip stick increases, and the followability to the belt decreases.

In Japanese Laid-Open Patent Publication No. 2014-043332, a plurality of chip sticks formed by joining a chip and a metal leaf spring are arranged in the width direction of the belt, and the lower part of the chip stick is fixed to a gantry arranged in the width direction of the belt. However, there is a problem that there is no dustproof sheet, dust adheres to the surface of the chip stick, the friction of the sliding surface of the chip stick increases, and the followability to the belt decreases.

In the publicity of Japanese Patent Application No. 2014-121127, a belt cleaner is proposed in which a strip cleaner is provided on a belt cleaner composed of a chip stick in which a tip is screwed to a rectangular rod-shaped rubber elastic body or a strip-shaped metal leaf spring. However, since dust invades through the gaps in the strip-shaped dustproof sheet, the dust is deposited and fixed on the chip stick.

A belt cleaner with a cover sheet has been proposed in the manufacturer's catalog and devised to prevent the scraped deposits from adhering to the belt cleaner, but the cover sheet is divided in the width direction of the belt for each scraping plate. Since dust entered from the break of the cover sheet, it accumulated at the boundary of the chip and hindered the movement of the chip.

JP 2013-252976 PR JP 2014-043332 PR Japanese Patent Application No. 2014-121127

Belt cleaner with cover sheet (Manufacturer catalog)

The present invention solves the following problems. (1) The chip is allowed to follow flexibly according to the wear state of the belt surface and the adhesion force of the deposit, so that the deposit can be surely scraped off. For that purpose, the width of the chip is divided into small parts so that the small unevenness of the belt can be followed finely. (2) The chip should be able to escape against obstacles such as strong deposits and endless peeling. As a means for this, the chip is greatly bent in the belt conveying direction so that these obstacles can be passed over. Also, in order to instantly avoid obstacles that collide at high speed, the width of the chip stick is made as small as possible to reduce its weight and reduce the moment of inertia of the chip stick. (3) A dust-proof cover is provided on the chip stick so that dust does not enter the adjacent side surfaces of the chip stick. (4) The dust accumulated on the dust-proof cover can be removed by the vibration of the chip. The present invention embodies a belt cleaner that satisfies the above problems.

The first solving means is, as shown in claim 1, a plurality of chip sticks formed by screwing a tip to a free end of a rectangular bar-shaped rubber elastic body or a strip-shaped metal leaf spring, In the belt cleaner with the dust-proof sheet attached thereto, the chips are attached one by one to the rectangular bar-shaped rubber elastic body or the strip-shaped metal leaf spring, and the dust-proof sheet Is a belt cleaner that is attached to the chip stick by cutting the end portion of the dustproof sheet to form a plurality of strips and fixing the strips with the chips.

According to a second aspect of the present invention, in the belt cleaner in which the tip is attached to the end face of the rectangular rod-shaped rubber elastic body to form a tip stick and the dustproof sheet is attached, A plurality of strips having the same width as the rectangular rod-shaped rubber elastic body or strip-shaped metal leaf spring are provided, and the strips are elastically formed from the chip and the rectangular rod-shaped rubber. It is a belt cleaner that is sandwiched and attached to the end face of a body or strip-shaped metal leaf spring.

The effects of the first solving means are as follows. (1) The chip can flexibly follow the surface of the belt and the adhesion force of the deposit, and the deposit can be reliably scraped off. For this reason, the width of the chip is divided into small parts so that the small unevenness of the belt can be followed finely. (2) The chip is allowed to escape against obstacles such as strong deposits and endless peeling. As a means for this, the chip is greatly bent in the belt conveying direction so that these obstacles can be passed over. Further, in order to instantly avoid obstacles that collide at high speed, the width of the chip stick is made as small as possible to reduce the weight and reduce the moment of inertia of the chip stick. (3) Since a dustproof cover is provided, dust does not accumulate on the chip stick. (4) Since there is a notch in the attachment portion of the dustproof sheet and the chip stick, each chip stick can independently swing and the followability to the belt is smooth. (5) Even if the chip stick breaks, it will not drop off because it is secured to the dustproof sheet. (6) By forming the dustproof sheet with a single sheet, the joints of the dustproof sheet are eliminated and dust does not enter. (7) Since the chip stick slightly vibrates according to the unevenness of the belt, the vibration is transmitted to the dust-proof cover, and the accumulated dust can be removed.

The effects of the second solving means are as follows. (1) Since the front and rear surfaces of the chip stick can be covered with a single dustproof sheet, attachment is easy, and since there is no joint between the dustproof sheets, there is no dust intrusion. (2) Since a dustproof cover is provided, dust does not accumulate on the chip stick. (3) There is a notch in the attachment part of the dustproof sheet and the chip stick, and each chip stick can be oscillated independently, and the followability to the belt is smooth. (4) Even if the chip stick breaks, it will not drop off because it is secured to the dustproof sheet. (5) The opening of the dustproof sheet is only a short slit, and dust can be prevented from accumulating on the surface of the chip stick, so that a smooth sliding motion can be maintained without dust entering the sliding surface of the chip stick. . (6) Since the chip stick vibrates slightly according to the unevenness of the belt, the vibration is transmitted to the dust-proof cover, and the accumulated dust can be removed.

FIG. 3 is a perspective view of a strip-shaped metal leaf spring chip stick attached to a belt. FIG. 3 is a partial perspective view of a strip-shaped metal leaf spring chip stick attached to a belt. FIG. 3 is a perspective view in which a dustproof sheet is attached to a rubber elastic chip stick. FIG. 3 is a perspective view in which a dustproof sheet is attached to a chip stick of an elastic plate spring. FIG. 3 is a perspective view in which a dustproof sheet is attached to a rubber elastic chip stick. FIG. 3 is a front view of a dustproof sheet provided with a single-sided strip. FIG. 3 is a front view of a dustproof sheet provided with a double strip.

An embodiment of the present invention will be described with reference to the claims and FIGS.

The first solution is a plurality of chips formed by screwing 24 the free ends 22a, 23a of a rectangular bar-shaped rubber elastic body 22 or a strip-shaped metal leaf spring 23 as shown in claim 1. In the belt cleaner 10 in which the sticks 20 are arranged and fixed in the belt width direction on the return side and the dustproof sheet 40 is attached, the tip 21 is attached to the rectangular bar-shaped rubber elastic body 22 or the strip-shaped metal leaf spring 23. The dustproof sheet 40 is attached one by one, and the dustproof sheet 40 is formed with a plurality of strips 40c by making cuts 40b in the end portions 40a of the dustproof sheet 40, and the plurality of strips 40 are one by one in the chip 21. and sandwiching the washer 25, or sandwiched by the tip stick 20 and the tip 21, one at the tip stick 20 Ne That is attached to stop 24 is a belt cleaner 10, characterized in.

The material of the chip 21 can be ceramics, cemented carbide or cermet. As the ceramic, for example, alumina, silicon nitride, zirconia, silicon carbide, or the like can be used. As the cemented carbide, for example, a WC—Co alloy, a WC—TiC—Co alloy, a WC—TaC—TaC—Co alloy and the like can be used. The cermet is mainly composed of TiC, TiN, or NbC, and a sintered product of a composite material with a metal such as Co, Ni, or Mo can be used. The width W of the chip 21 is preferably 10 to 30 mm. If it is smaller than 10 mm, the rigidity of the rectangular rod-shaped rubber elastic body 22 or the strip-shaped metal leaf spring 23 becomes small, and there is a problem that the deflection is too large. If it is larger than 30 mm, the small unevenness of the return side belt 30 cannot be followed and the scraping performance deteriorates.

As the material of the dustproof sheet 40, resin sheets and glass fibers such as fluorine, polyurethane, polyimide, aramid, nylon, silicon, acrylic, and polyester can be used. A fluororesin sheet is excellent for dust releasability. Further, a sheet in which a glass fiber is impregnated with a fluororesin is excellent in tensile strength and abrasion resistance and is suitable as a dustproof sheet.

Since dust scraped off by the belt cleaner 10 accumulates on the dustproof sheet 40, it must be a material with good slipperiness. By using the glass fiber impregnated with fluorine for the dustproof sheet, the slipperiness can be improved and the dustproof sheet 40 having high strength can be formed. Since the cuts 40b, 41b, and 42b are made in the dustproof sheet 40, the cut end can be prevented from being torn due to stress concentration. The dustproof sheet 40 can be integrally formed with a single sheet and can share the thrust force in the width direction of the return belt acting on the chip stick 20, so that the chip stick can be prevented from spreading laterally.

FIG. 1 is a view in which chip sticks 20 made of strip-shaped metal plate springs 23 are arranged on a stand 50 and attached to a return side belt 31. FIG. 2 is a partially enlarged view when a chip stick made of a strip-shaped metal plate spring is attached to the return side belt 31. FIG. 3 is a diagram in which the chip sticks 20 in which the chips 21 are fixed to the front surface 22c of the rectangular bar-shaped rubber elastic body 22 with screws 24 are arranged in a row. FIG. 4 is a diagram in which a plurality of chip sticks 20 each having the chip 21 fixed to the front surface 23c of the strip-shaped metal plate spring 23 with screws 24 are arranged. FIG. 5 is a diagram in which the chip sticks 20 in which the chips 21 are fixed to the end surfaces 22 d of the rectangular bar-shaped rubber elastic bodies 22 with screws 24 are arranged.

A chip stick 20 composed of a rectangular bar-shaped rubber elastic body 22 and a strip-shaped metal plate spring 23 is pushed up and set several millimeters from the return side belt 31. When the return side belt 30 is driven, the chip stick 20 receives the horizontal force of the return side belt 30 and tilts in the belt traveling direction. Since the chip stick 20 presses the return side belt 30 with an elastic force, the dust is scraped off while always following the unevenness and deformation of the return side belt 30. The chip stick 20 is rod-shaped or strip-shaped, and is subdivided into a width of 10 to 30 mm in the belt width direction, so that dust can be scraped off without unevenness while closely following small irregularities and deformation of the return side belt 30. . Further, the chip stick 20 constantly vibrates due to the impact caused by the unevenness or deformation of the return side belt 30, and this vibration is transmitted to the dustproof sheet 40, and the dust falling on the dustproof sheet is automatically wiped out. Dust does not accumulate on the sheet.

If the chip 21 slides on the side surfaces 21a adjacent to each other, dust does not enter between the chips. On the other hand, since there are gaps 20b on the adjacent side surfaces 20a of the rectangular rod-shaped rubber elastic body 22 and the strip-shaped metal leaf spring 23 that constitute the chip stick 20, even if dust enters, it adheres. Since the tip stick 20 is immediately dropped without being moved, the smooth movement of the chip stick 20 is maintained. However, when dusts accumulated on the surface of the chip stick 20 are bonded together, a large lump is formed, and the sliding motion of the chip stick 20 may be reduced. In order to solve this, it is necessary to provide the dustproof sheet 40. Even if dust falls once on the dust-proof sheet, it will slide down immediately and will not accumulate on the chip stick 20, so that the smooth movement of the chip stick 20 is maintained. Further, the slight vibration due to the swinging of the chip stick 20 is transmitted to the dustproof sheet 40, and the dropped dust can be forcibly separated.

As shown in FIGS. 3 and 4, when the chip 21 is attached by protruding from the rectangular bar-shaped rubber elastic body 22 or the strip-shaped metal plate spring 23, a dustproof sheet 40 is attached to the front surface of the chip 21. Since the space 10a is formed between the dustproof sheet 40 and the rectangular rod-shaped rubber elastic body 22 or the strip-shaped metal plate spring 23, when dust accumulates on the dustproof sheet 40, it is applied to the chip stick 20 by the weight of the dust. Since it does not adhere, smooth sliding movement of the chip stick 20 can be maintained.

The strip 41c of the dustproof sheet 41 shown in FIG. 6 is formed by inserting a notch 41b into the end 41a of the dustproof sheet 41, so that one side is released and one side is connected and fixed to the dustproof sheet 41 to become a single-clamped strip 41c. Yes. 3 and 4 show a method in which a strip 41c is sandwiched between a chip 21 and a washer 25 and fixed to a rectangular bar-shaped rubber elastic body 22 or a strip-shaped metal leaf spring 23. FIG. In addition, there is a method in which the strip 41c is sandwiched and fixed between the chip 21 and a rectangular rod-shaped rubber elastic body 22 or a strip-shaped metal plate spring 23. In any case, the strip 41 c is sandwiched between the chips 21 and attached to the chip stick 20. Alternatively, there is a method in which the dust-proof sheet 41 is preliminarily fixed to the rectangular rod-shaped rubber elastic body 22 or the strip-shaped metal plate spring 23 with screws 24 and then the dust-proof sheet 41 is cut into 41b to form the single-sided strip 41c. By pressing the strip 41c of the dustproof sheet 41 with the washer 25 or the chip 21 having a large area, the surface pressure applied to the strip 41c can be reduced, so that the dustproof sheet 41 is not easily damaged.

Although the strip-shaped metal leaf springs 23 may be damaged due to thinning due to corrosion or vibration due to horizontal force from the return side belt 30, the strip-like metal leaf springs 23 are connected to each other by the dustproof sheet 40, and thus fall off even if broken. It will not damage the downstream belt.

The vertical length H of the dustproof sheet 41 shown in FIG. 6 is preferably longer than that of the chip stick 20. If it is short, there is a problem that dust enters between the chip sticks 20. If it is too long, it becomes heavier and hinders the sliding movement of the chip stick 20. The thickness of the dustproof sheet 41 is preferably 0.1 to 2.0 mm. If it is thinner than 0.1 mm, there is a problem that rigidity is lost and the dustproof sheet 41 is in close contact with the chip stick 20 due to the weight of dust. If it is thicker than 2.0 mm, the rigidity of the dustproof sheet 41 increases, and the slidability of the chip stick 20 is hindered when the dustproof sheet 41 slides next to each other. The role of the strip 41c formed by cutting the notch 41b into the dustproof sheet 40 is to allow each chip 21 to perform a peristaltic motion independently. By the strip 41c, the chip 21 can freely swing without being influenced by the adjacent chip 21. Therefore, the width W1 of the strip 41c is made equal to or smaller than the chip width W. When the strip 41 c protrudes from the chip width W, the sliding movement with the adjacent chip 21 is hindered, and the chip 21 returns flexibly and cannot follow the unevenness of the belt 30. The length of the cut 41b, that is, the strip length h is preferably 10 to 30 mm. If it is smaller than 10 mm, the resistance to the peristaltic motion of the chip stick 20 is large. When it is larger than 30 mm, there is a problem that dust enters from the notch 41b. The length L of the dustproof sheet 41 in the belt width direction is preferably equal to or longer than the length of the chip sticks 20 arranged in a row.

The rectangular rod-shaped rubber elastic body 22 requires a pressing force for pressing the chip 21 against the return side belt 30 and also needs to have a restoring force by flexibly following the delicate unevenness of the return side belt 30. Is used. As the rubber, for example, natural rubber, acrylic rubber, nitrile rubber, urethane rubber, fluorine rubber, or the like can be used.

As shown in FIG. 3, the rectangular rod-shaped rubber elastic body 22 has a rectangular cross section, but is preferably a square or a rod shape close to a square. By making it square, the tip 21 is less likely to be twisted when subjected to an offset load. The width B of the rectangular rod-shaped rubber elastic body 22 is preferably 10 to 30 mm square. If it is 10 mm or less, the rigidity is weak and the scraping ability becomes small. When it is larger than 30 mm, the rigidity is too large and the bending becomes small, and the small unevenness of the return side belt 30 cannot be flexibly followed. The length of the rectangular rod-shaped rubber elastic body 22 is preferably 50 to 300 mm. If it is shorter than 50 mm, the deflection is too small and the followability of the belt 30 is reduced. If it is longer than 300 mm, the amount of deflection is too large and the scraping force is reduced.

The strip-shaped metal plate spring 23 needs a pressing force to press the chip 21 against the return side belt 30 and flexibly follows the delicate unevenness of the return side belt 30 and needs a restoring force. Metals such as steel, SUS, carbon steel, titanium, and copper plate can be used.

As shown in FIG. 4, the cross-section of the strip-shaped metal plate spring 23 is strip-shaped and is a rectangle elongated in the vertical direction. The thickness of the strip-shaped metal plate spring 23 is preferably 1 to 5 mm. If it is thinner than 1 mm, the rigidity is too weak and it bends too much. If it is thicker than 5 mm, the rigidity is too large and the deflection becomes small, and the followability to the unevenness of the return side belt 30 is lowered. The width B of the strip-shaped metal plate spring 23 is preferably 10 to 30 mm. If it is 10 mm or less, the rigidity is weak and the scraping ability becomes small. If it is larger than 30 mm, the rigidity is too large to bend properly and the followability to the return side belt 30 is lowered. The length of the strip-shaped metal plate spring 23 is preferably 50 to 300 mm. If it is shorter than 50 mm, the deflection is too small and the followability to the return side belt 30 is lowered. If it is longer than 300 mm, the amount of deflection is too large and the scraping force is reduced.

In FIG. 2, the example of the fixing method of the chip stick 20 which consists of a strip-shaped metal leaf | plate spring 23 is shown. The chip stick 20 is inserted and arranged in the groove 50 a of the gantry 50. The gantry 50 includes a pressing plate 51, a receiving plate 52, and a bottom plate 53, and forms a groove 50a. A nut 55 is welded to the pressing plate 51, and a pressing bolt 54 is attached to the nut 55. By pressing the pressing plate 56 with the pressing bolt 54, the chip stick 20 is pressed against the receiving plate 52 and fixed. The method of fixing the rectangular bar-shaped rubber elastic body 22 is the same.

According to a second solution, as shown in claim 2, a plurality of chip sticks 20 formed by fixing the chips 21 to the free terminals 22a of the elastic bodies 22 made of a square bar-shaped rubber are fixed in the belt width direction of the return side. In the belt cleaner 10 in which the dust-proof sheet 40 is attached while being arranged and fixed, the chip stick 20 is formed by attaching the chip 21 to the end face 22d of the elastic body 22 made of the square bar rubber, and the dust-proof sheet 40 A notch 42b is formed in the interior 42a of the slab, and a plurality of strips 42c having substantially the same width as the elastic body 22 made of the rectangular bar-shaped rubber are provided, and each of the plurality of strips 41c, one chip 21 and one each. A belt cleaner characterized by being attached to the end face 22d of the elastic body 22 made of a rectangular bar-shaped rubber by being clamped with screws 24. It is 0.

As shown in FIG. 7, the dustproof sheet 42 is formed with a strip 42 c by making a cut 42 b in the interior 42 a. Therefore, both ends of the strip 42 are connected to the dustproof sheet 42 to form a double-stopped strip 42c. The vertical length H of the dustproof sheet 42 is preferably at least twice the length of the chip stick 20 because it covers the front and back sides of the chip stick 20. If it is short, there is a problem that dust enters between the chip sticks 20. If it is too long, it becomes heavier and hinders the sliding movement of the chip stick 20. The thickness of the dustproof sheet 42 is preferably 0.1 to 2.0 mm. If it is thinner than 0.1 mm, there is a problem that rigidity is lost and the dustproof sheet 42 is in close contact with the chip stick 20 due to the weight of dust. If it is thicker than 2.0 mm, the rigidity of the dustproof sheet 42 increases, and the slidability of the chip stick 20 is hindered when the dustproof sheet 42 slides next to each other. The width W1 of the strip 42c is substantially the same as or smaller than the chip width W so that the resistance from the strip 42c attached to the adjacent chip 21 is not received when the chip 21 swings in the moving direction of the return side belt 30. To do. The length h of the notch 42b is preferably 20 mm + W0 to 60 mm + W0 in order to secure the strip length on the front side and the back side. If it is smaller than 20 mm + W0, the resistance to the peristaltic motion of the chip stick 20 is large. When it is larger than 60 mm + W0, there is a problem that dust enters from the cut 42b. W0 is the thickness of the chip 21.

In FIG. 5, a notch 42b is formed in the interior 42a of the dustproof sheet 42 to form a double-clamping strip 42c having the same width as that of the chip stick, and the double-clamping strip 42c is placed on the end surface 22d of the rectangular rubber elastic body 22. Then, the dust-proof sheet 42 is fixed to the square bar-shaped rubber elastic body 22 by fixing the chip 21 to the end surface 22d with the screw 24. Alternatively, the dust-proof sheet 42 may be placed in advance on the end surface 22d of the rectangular rod-shaped rubber elastic body 22, and the chip 21 may be fastened to the end surface 22d with the screw 24, and then the dust-proof sheet 42 may be cut to form the strip 42c. . As shown in FIG. 5, if the dustproof sheets 42 on the front side and the back side of the chip stick 20 are formed with a single dustproof sheet 42, there is no joint, so the dust blocking effect is improved.

10: Belt cleaner 10a: Space 20: Chip stick 20a: Adjacent side surface 20b (between chip sticks): Clearance 21: Tip 21a: Adjacent side surface (of chip) 22: Square rod rubber elastic body 22a: Free terminal 22b: Fixed terminal 22c: Front face 22d: End face 23: Strip metal leaf spring 23a: Free terminal 23b: Fixed terminal 23c: Front face 24: Screw 30: Return side belt 40: Dustproof sheet 40a: End 40b : Notch 40c: strip 41: dustproof sheet 41a: end 41b: notch 41c: (one-sided) strip 42: dustproof sheet 42a: inside 42b: notch 42c: (two-sided) strip 50: mount 50a: groove 51: pressing plate 52: receiving plate 53: bottom plate 54: pressing bolt 55: nut 56: presser plate H: vertical width of the dustproof sheet : Width of the dust-proof sheet h: strip length W: Chip width W0: Chip Thickness W1: strip width

Claims (2)

A plurality of chip sticks formed by screwing the chips to the free end of a rectangular bar-shaped rubber elastic body or a strip-shaped metal leaf spring are fixed in a row in the width direction of the return side belt, and a dustproof sheet is attached. In the belt cleaner, the chips are attached one by one to the rectangular bar-shaped rubber elastic body or the strip-shaped metal leaf spring, and the dust-proof sheet has a plurality of cuts at the end of the dust-proof sheet. The plurality of strips are sandwiched between the chip and the washer one by one, or are sandwiched between the chip and the chip stick, and attached to the chip stick by screwing one by one. A featured belt cleaner. In the belt cleaner to which a plurality of chip sticks formed by screwing the chips to the free end of the rubber elastic body made of a square bar and arranged in the return side belt width direction are fixed and attached with a dustproof sheet, the square bar shape Attaching the chip to the end face of a rubber elastic body to form the chip stick , cutting into the dustproof sheet, providing a plurality of strips having the same width as the rectangular bar rubber elastic body, A belt cleaner characterized in that each of the plurality of strips is attached to each of the end surfaces of one chip and one elastic rubber body made of a square bar by screwing each of the strips.