JP5771886B1 - Belt cleaner - Google Patents

Abstract

In a belt cleaner in which a tip is screwed to a free end of a strip-shaped metal plate spring and arranged on a gantry, the tip flexibly follows the wear condition of the belt surface and the adherence of adherents. It is possible to scrape off the adhered material, to allow these tips to escape against obstacles such as strong adhered material and endless peeling, and to easily manufacture and attach the metal leaf spring. Provide the structure. A strip-shaped metal plate spring 30 is provided with a dogleg 31a or a bent portion 31 of an arc, and the length of the spring is increased, so that the rigidity of the strip-shaped metal plate spring can be easily set in a narrow space. Thus, the protrusions on the belt running at a high speed can be avoided by flexing instantaneously, and the deposits are usually scraped off by a large pressing force. Further, a guide is provided on the rear surface side of the chip 20 so that smooth sliding is possible. [Selection] Figure 1

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.

Belt conveyors are the most efficient mass transportation means in thermal power plants, steelworks, chemical plants, waste treatment plants, sewage treatment plants, etc., to transport various raw materials, fuel, processed materials, waste, etc. Many belt conveyors are used. 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 3K work repetition. 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 pressure adjustment of the belt cleaner against the belt with uneven wear is adjusted to the center portion where the wear is greatest, 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 when the belt cleaner exceeds the bending limit, or the endless peeling may be promoted and the belt may be cut if the belt cleaner has a large pressing force. 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 properly maintain the scraper scraping performance of the belt cleaner, it is best to adjust the contact pressure between the belt cleaner and the belt while observing the scraping state of the deposit while the belt is running. It was difficult due to safety issues. 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 the adjustment of rigidity is difficult, the avoidance of protrusions traveling at high speed is delayed, and the belt is damaged, and the deposits are not sufficiently scraped off.

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 the adjustment of rigidity is difficult, the avoidance of protrusions that run at high speed is delayed, and the belt is damaged, and the deposits are not sufficiently scraped off.

JP 2013-252976 PR JP 2014-043332 PR

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) Facilitates the manufacture and attachment of strip-shaped metal leaf springs.

As shown in claim 1, the first solution is to screw the chip onto the free end of the strip-shaped metal leaf spring and fix the stationary end of the strip-shaped metal leaf spring to fix the return belt. In the belt cleaner arranged in the width direction, a sliding guide is provided on the back surface of the strip-shaped metal leaf spring, and the sliding guide side surface between the adjacent sliding guides and the chip side surface between the adjacent chips slide. It is a belt cleaner characterized by moving.

The second solution means is the belt cleaner according to claim 1 , wherein the sliding guide is a sliding guide block.

A third solving means is the belt cleaner according to claim 1 or 2 , wherein the sliding guide is a sliding guide plate.

The effects of the first solving means are as follows. (1) Since the sliding guide is a block, the rigidity of the guide can be increased, so that the sliding movement of the chip is stabilized. (2) The chip can be firmly fixed with a strip-shaped metal plate spring and a sliding guide. (3) Since the tip width is divided into small parts so that it can follow the small unevenness of the belt finely, the tip can flexibly follow the belt surface according to the wear situation and adhesion force Deposits can be scraped off.

The effects of the second solving means are as follows. (1) Since the sliding guide is a block, the rigidity of the guide can be increased, so that the sliding movement of the chip is stabilized. (2) The chip can be firmly fixed with a strip-shaped metal plate spring and a sliding guide.

The effects of the third solving means are as follows. (1) Since the sliding guide is formed by pressing a metal plate, the weight can be reduced. (2) The chip can be firmly fixed with a strip-shaped metal plate spring and a sliding guide.

FIG. 3 is a perspective view of a cleaner in which a chip is attached to a strip-shaped metal plate spring. FIG. 3 is a partial perspective view of a strip-shaped metal leaf spring provided with a dogleg-shaped bent portion. FIG. 3 is a partial perspective view of a strip-shaped metal leaf spring provided with an arc-shaped bent portion. These are the front view and side view of the cleaner which enabled sliding of the side surface of a chip | tip. Fig. 4 is an arrangement diagram of strip-shaped metal leaf springs attached with chips whose side surfaces are slidable. These are a side view and a plan view of a chip to which a sliding guide block is attached. These are a side view and a plan view of a chip to which a sliding guide plate is attached. FIG. 3 is a front view of a strip-shaped metal leaf spring formed by cutting a metal plate. FIG. 3 is a front view of a strip-shaped metal leaf spring formed by cutting a metal plate. FIG. 3 is a front view of a strip-shaped metal leaf spring formed by cutting a metal plate.

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

In the first solution, as shown in claim 1, the chip 20 is fixed to the free terminal 30a of the strip-shaped metal leaf spring 30 with a screw 21 and the fixed terminal 30b of the strip-shaped metal leaf spring 30 is fixed. In the belt cleaner 10 arranged in the width direction of the return side belt 50, a sliding guide 240 is provided on the back surface 30f of the strip-shaped metal leaf spring 30, and the sliding guides between the adjacent sliding guides 240 are provided. The belt cleaner 10 is characterized in that the side surface 240a and the chip side surface 20a between the adjacent chips 20 slide.

FIG. 1 is a view in which strip-shaped metal leaf springs 30 with chips 20 fixed to a free terminal 30 a are arranged on a mount 40 and attached to a return side belt 50. FIG. 2 is a diagram in which strip-shaped metal leaf springs 30 provided with a plurality of dog-shaped bent portions 31 and 31a are arranged in a line. FIG. 3 is a diagram in which strip-shaped metal leaf springs 30 provided with a plurality of arc-shaped bent portions 31 and 31b are arranged in a line. 4A and 4B are diagrams in which a chip 20 whose side surface is slidable is attached to a strip-shaped metal leaf spring 30, FIG. 4A is a front view, and FIG. 4B is a side view. FIG. 5 is a diagram in which a plurality of strip-shaped metal plate springs 30 to which chips 20 whose side surfaces 20a are slidable are attached are arranged in a row. FIG. 6 is a diagram of a strip-shaped metal leaf spring 30 in which a chip 20 provided with sliding guide blocks 240 and 241 is attached to the back surface 30f of the strip-shaped metal leaf spring 30. FIG. FIG. 6B is a cross-sectional view taken along the line AA of FIG. 6B. FIG. 7 is a diagram of a strip-shaped metal leaf spring 30 in which a chip 20 provided with sliding guide plates 240 and 242 is attached to the back surface 30f of the strip-shaped metal leaf spring 30. FIG. FIG. 7B is a sectional view taken along the line AA of FIG. FIG. 8 is a plan view when the strip-shaped metal plate spring 30 is formed by providing the metal plate 32 with the notches 32c. FIG. 9 is a plan view when the metal plate 32 is provided with the notches 32 c to form the strip-shaped metal plate spring 30 and the gap 30 e is provided between the strip-shaped metal plate springs 30. FIG. 10 is a plan view when a metal plate 32 is provided with a notch 32c to form a strip-shaped metal leaf spring 30, and a gap 30e is provided at an intermediate portion between the free terminal 32a and the fixed terminal 32b of the metal plate 32. It is.

The material of the chip 20 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 composite material with a metal such as Co, Ni, or Mo can be used.

Since the strip-shaped metal leaf spring 30 requires a pressing force to press the chip 20 against the return side belt 50 and flexibly follows the delicate unevenness of the return side belt 50, a restoring force is required. Metals such as carbon steel, titanium, copper plate and spring steel can be used.

The strip-shaped metal leaf spring 30 has a strip shape and is elongated in the vertical direction. The thickness of the strip-shaped metal plate spring 30 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 50 is lowered. The width B of the strip-shaped metal plate spring 30 is preferably 10 to 30 mm. 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 to bend properly and the followability to the return side belt 50 is lowered. The width B of the strip-shaped metal leaf spring 30 is at least as small as the width W of the chip. This is because if the width is larger than the width W of the chip, a gap is generated between the chips, and scraping is left. The length of the strip-shaped metal plate spring 30 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 50 is lowered. If it is longer than 300 mm, the amount of deflection is too large and the scraping force is reduced.

The strip-shaped metal leaf spring 30 is required to have a function of flexibly and flexibly in order to instantaneously avoid an impact force received from an endless turn or a strong deposit that collides at high speed. Further, when a biased load is applied to the tip 20, a large torsional moment is generated, so that a large section modulus that does not cause the tip 20 to be twisted is required. When the tip 20 is twisted and becomes inclined, the tip 20 cannot be brought into contact with the return side belt 30 accurately, so that scraping remains. Further, in order to scrape dust in close contact with the return side belt 50, the strip-shaped metal leaf spring 30 needs to have a high rigidity enough to withstand a strong pressing force. In order to satisfy this condition, the strip-shaped metal leaf spring 30 is provided with, for example, the U-shaped bent portions 31, 31a and the arc-shaped bent portions 31, 31b to improve the section modulus and at the same time, It is necessary to increase the length of the metal leaf spring 30 to ensure a flexible amount of bending. The length of the strip-shaped metal plate spring 30 is increased and greatly bent by providing the strip-shaped metal plate spring 30 with the arcuate bent portions 31, 31a and the arc-shaped bent portions 31, 31b. At the same time, the followability to the unevenness and deformation of the return belt 30 is improved, and the deposits can be scraped off strongly.

As shown in FIGS. 2 and 3, the chip 20 is attached to a strip-shaped metal plate spring 30 with a backing plate 23, a screw 21 and a nut 22. A through hole 20b is formed in the chip 20, a through hole 30d is formed in the strip-shaped metal plate spring 30, and a through hole 23a is formed in the contact plate 23 so that the screw 21 can be penetrated. The contact plate 23 is necessary to distribute the tightening force over the entire chip 20 and prevent the chip 20 from being damaged when the chip 20 is tightened with the screw 21. The backing plate 23 can be made of a metal such as carbon steel, SUS, titanium, copper, or spring steel. Since the contact plate 23 has less wear resistance than the chip 20, it quickly wears out, and is always in a position retracted from the chip 20, and does not impair the scraping performance of the chip 20. Two screws 21 are used to prevent the tip 20 from rotating. If the chip 20 is prevented from rotating, such as by applying an adhesive, there is no problem even if only one screw 21 is used.

As shown in FIGS. 1 and 2, the belt cleaner 10 has a structure in which a tip 20 is attached to a free end 30 a of a strip-shaped metal leaf spring 30 and a fixed terminal 30 b is fixed to a gantry 40. In FIG. 2, the example of the fixing method of the strip-shaped metal leaf | plate spring 30 which has the character-shaped bending part 31b is shown. The strip-shaped metal leaf springs 30 with the chips 20 are inserted and arranged in the grooves 40 a of the gantry 40. The gantry 40 includes a pressing plate 41, a receiving plate 42, and a bottom plate 43, and forms a groove 40a. A nut 46 is welded to the pressing plate 41, and a pressing bolt 45 is attached to the nut 46. By pressing the pressing plate 44 with the pressing bolt 45, the strip-shaped metal plate spring 30 with the chip 20 is pressed against the receiving plate 42. It is fixed.

The strip-shaped metal plate spring 30 with the chip 20 is pushed up and set by several millimeters with respect to the return side belt 50. When the return side belt 50 is driven, the strip-shaped metal leaf spring 30 with the chip 20 is tilted in the belt traveling direction under the horizontal force of the return side belt 50. Since the strip-shaped metal plate spring 30 with the chip 20 presses the return side belt 50 with an elastic force, dust can be scraped off while always following the unevenness and deformation of the return side belt 50.

The dogleg-shaped bent portion 31a and the arc-shaped bent portion 31b can be formed by a press machine, for example. In FIG. 2, the number of the bent portions 31 of the dogleg-shaped bent portion 31a is six, but usually three to ten is preferable. If it is two or less, the deflection is too small. If it is 11 or more, it will bend too much. Further, dust accumulates on the bent portion 31a. The height h1 of the U-shaped bent portion 31a is preferably 20 to 60 mm. If it is less than 20, it will bend too much. Further, dust accumulates on the bent portion 31a. The width b1 is preferably 5 to 30 mm. If it is smaller than 5 mm, the deflection is too large. Moreover, dust accumulates. If it is larger than 30 mm, the deflection is too small. In FIG. 3, the number of the bent portions 31 of the arc-shaped bent portion 31b is three, but usually three to ten is preferable. If it is two or less, the deflection is too small. If it is 11 or more, it will bend too much. Further, dust accumulates on the bent portion 31b. The radius R of the arc is preferably 10 to 30 mm. If it is smaller than 10 mm, the deflection is too small. Further, dust accumulates on the bent portion 31b. If it is larger than 30 mm, the deflection is too large.

The strip-shaped metal leaf spring 30 is provided with the bow-shaped bent portions 31 and 31a and the arc-shaped bent portions 31 and 31b, so that it can be flexibly bent with respect to the belt endless turning and strong adhered matter. In addition, since it has a high degree of adhesion to the return side belt 50, the dust scraping performance is excellent. The strip-shaped metal leaf spring 30 is strip-shaped and is subdivided into a width of 10 to 30 mm in the belt width direction, so that the dust can be scraped off without causing unevenness while closely following small irregularities and deformation of the return side belt 50. Can do. The strip-shaped metal leaf spring 30 with the chip 20 is always vibrated by an impact caused by the unevenness or deformation of the return side belt 50, and dust falling on the strip-shaped metal leaf spring 30 is automatically removed. Can do.

As shown in FIG. 4, the chip width W is larger than the strip-shaped metal leaf spring width B, and the chip side surfaces 20a are in contact with each other to slide. Since the chip side surfaces 20a slide in contact with each other, no scraping residue is generated between the chip 20 and the chip 20. Since the chip side surface 20a is shorter than the strip-shaped metal leaf spring 30, even if the chip side surfaces 20a are in contact with each other and slide, the sliding resistance is small, so the chip 20 and the strip-shaped metal leaf spring 30 are smooth. Maintain peristaltic movement. When the adjacent side surfaces 30c of the strip-shaped metal leaf springs 30 come into contact with each other, the sliding resistance is increased and the peristaltic movement of the chip is hindered. Further, when dust is caught in the strip-shaped metal plate spring side surface 30c, the smooth sliding movement of the chip 20 cannot be performed. For this reason, while the chip side surfaces 20a are slid in contact with each other, a large gap (gap between chip sticks) 30e is formed on the strip-shaped metal leaf spring side face 30c so as not to bite dust. It is.

A gap 30 e is formed in the strip-shaped metal plate spring 30. There is a risk that dust accumulates and adheres to the strip-shaped metal leaf spring 30 over time. By providing a gap 30e between the strip-shaped metal leaf springs 30, even if dust enters, it will drop without bridging. Further, since the fine vibration of the strip-shaped metal plate spring 30 destroys the dust bridge, the strip-shaped metal plate spring 30 does not adhere and become inoperable. Therefore, if the gap 30e is small, a dust bridge is generated, so it is necessary to form a large gap 30e. The size of the gap 30e is preferably 1 to 10 mm. If it is smaller than 1 mm, a dust bridge is generated in the gap 30e, and the strip-shaped metal leaf spring 30 is fixed to make the peristaltic motion inoperable. On the other hand, if it is larger than 10 mm, there is a problem that the strip-shaped metal leaf spring 30 cannot withstand the torsional moment when the tip 20 receives an eccentric load and bends. By forming a gap 30e that is large to some extent on the adjacent side surface 30c of the strip-shaped metal leaf spring 30, there is no dust clogging, and it is possible to prevent the strip-shaped metal leaf spring 30 from malfunctioning due to dust adhesion.

Since the side surface 20a of the chip 20 is thin, when the strip-shaped metal plate spring 30 is largely bent, a part of the side surface 20a protrudes and cannot slide, so that when the twist is applied to the strip-shaped metal plate spring 30 Peristaltic movement becomes unstable. For this reason, as shown in FIGS. 6 and 7, a sliding guide 240 is provided on the back surface 30f of the strip-shaped metal leaf spring 30 to widen the sliding area, thereby stabilizing the peristaltic motion.

The side surface 240a of the sliding guide 240 is flush with the side surface 30a of the strip-shaped metal leaf spring 30 so that the sliding guide 240 can slide integrally.

The second solving means is the belt cleaner 10 in which the sliding guide 240 is a sliding guide block 241 as shown in claim 2.

For the sliding guide block 241, resins such as fluororesin and urethane resin, rubber, aluminum, titanium, carbon steel and the like can be used. Fluororesin is suitable as a sliding guide block because of its low coefficient of friction.

Since the side surface 241a of the sliding guide block 241 is flush with the side surface 30a of the strip-shaped metal leaf spring 30, the width W1 of the sliding guide block 241 is formed to be the same as the width W of the chip 20.

Since the sliding guide block 241 has rigidity, the chip 20 is fixed to the strip 20 by integrally fixing the chip 20, the strip-shaped metal plate spring 30, and the sliding guide block 241 with the screw 21. It becomes the reinforcement at the time of attaching to 30.

A third solving means is a belt cleaner 10 in which the sliding guide 240 is a sliding guide plate 242 as shown in claim 3.

The sliding guide plate 242 can be formed by pressing or cutting a plate of aluminum, titanium, carbon steel or the like. Further, the resin block can be formed by cutting out.

Since the side surface 242a of the sliding guide plate is flush with the side surface 30a of the strip-shaped metal leaf spring 30, the width W2 of the sliding guide plate 242 is formed to be the same as the width W of the chip 20.

Since the sliding guide plate 242 is rigid, the chip 20 is fixed to the strip 20 by integrally fixing the chip 20, the strip-shaped metal plate spring 30, and the sliding guide plate 242 with the screws 21. It becomes the reinforcement at the time of attaching to 30.

The metal plate 32 can be made of spring steel, SUS, titanium or the like. The cut 32c of the metal plate 32 can be formed by a laser cutting machine, a plasma cutting machine, a cutting machine, or the like.

The free terminal 32 a of the metal plate 32 is a side on which the chip 20 is attached to the strip-shaped metal plate spring 30. The free terminal 32 a is provided with a through hole 30 d for screwing the chip 20. The strip-shaped metal leaf spring 30 is fixed by attaching the fixed terminal 32 b to the gantry 40. The notch 32c is cut inwardly from the free terminal 32a of the metal plate 32. However, since the notch 32c is cut only halfway through the metal plate 32, the fixed terminal 32b is connected. The shape of the notch 32c may be formed linearly as shown in FIG. Since the side surfaces 30c of the strip-shaped metal plate springs 30 are close enough to come into contact with each other, the strip-shaped metal plate springs support each other and are not easily twisted. A cut 32c may be provided so as to form a gap 30e as shown in FIG. Since the adjacent side surfaces 30c of the strip-shaped metal leaf springs 30 form a large gap 30e, dust can hardly be clogged in the gap 30e, so that a smooth peristaltic motion can be maintained. As shown in FIG. 10, the strip-shaped metal leaf spring 30 may be provided with a notch 32c on the free terminal 30a side and a notch 32e on the fixed terminal 30b side. Since the tip 20 and the free terminal 30a can slide, the tip 20 is hardly twisted. Further, since dust does not accumulate in the gap 30e, a smooth peristaltic motion can be maintained.

10: belt cleaner 20: chip 20a: chip side surface 20b: through hole 21: screw 22: nut 23: contact plate 23a: through hole 240: sliding guide 240a: side surface 241 (of sliding guide) 241: sliding guide block 241a : Side surface 242 (of sliding guide block) 242: Sliding guide plate 242a: Side surface 30 (of sliding guide plate): Strip-shaped metal leaf spring 30a: Free terminal 30b: Fixed terminal 30c: (Strip-shaped metal) Adjacent leaf springs) Side surface 30d: Through hole 30e: Clearance 30f: Back surface 31: Bent portion 31a: Bent-shaped bent portion 31b: Arc-shaped bent portion 32: Metal plate 32a: Free terminal 32b: Fixed terminal 32c: Notch 40: stand 40a: groove 41: pressing plate 42: receiving plate 43: bottom plate 44: holding plate 45: pressing bolt 46: nut 50: return Side belt W: Chip width W1: width of the sliding guide block W2: width of the sliding guide plate B: wide strips of metal plate spring

Claims (3)

In a belt cleaner in which a chip is screwed to a free end of a strip-shaped metal plate spring, and a fixed terminal of the strip-shaped metal plate spring is fixed and arranged in the width direction of the return side belt, the strip-shaped metal A belt cleaner, characterized in that a sliding guide is provided on the back surface of the plate spring, and a sliding guide side surface between adjacent sliding guides and a tip side surface between adjacent chips slide. The belt cleaner according to claim 1, wherein the sliding guide is a sliding guide block. The belt cleaner according to claim 1 or 2, wherein the sliding guide is a sliding guide plate.