JP6191935B1 - Belt cleaner - Google Patents

Abstract

In a belt cleaner in which a plurality of rectangular rod-shaped rubber elastic bodies are arranged in a groove of a gantry, the rectangular rod-shaped rubber elastic bodies are prevented from coming out of the groove even if they are not connected by a horizontal skewer. In addition, after the height adjustment, the rectangular elastic rubber body can be fixed to the frame from both sides of the conveyor. Further, the scraping performance is maintained for a long period of time so that the adhered matter after scraping does not accumulate between the tip of the rectangular bar-shaped rubber elastic body and the return side belt. A rectangular metal plate is fixed by attaching a metal plate for fixing a rectangular bar-shaped rubber elastic body facing the longitudinal direction of the gantry, and pressing a protrusion of the metal plate for fixing against the elastic body made of rubber rubber with a tightening bolt. The rubber elastic body was prevented from coming out. Also, bend the tip mounting part of the elastic body made of square bar rubber into a square shape to make the angle formed between the tip and the return side belt an obtuse angle, and deposit deposits after scraping between the tip and the return side belt Prevented. [Selection] Figure 1

Description

  The present invention relates to a belt cleaner that scrapes off deposits adhering to the return belt surface of a belt conveyor used for transporting raw materials, and relates to a belt cleaner that enables the height of the scraping portion to be adjusted in accordance with the shape of the belt. is there.

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 (return side belt), and returns to the driven pulley, but the transported material (to the belt) attached to the return side belt surface. The adhering material) drops in the middle and accumulates under the return belt. Further, there is a problem that the adhering matter wears the return roller and the snap pulley, or adheres to these rollers and causes the return side belt to meander.

Usually, a belt cleaner is installed at the forefront of the return side belt in order to efficiently scrape and collect the deposits on the return side belt. Belt cleaners include a scraper type that presses a fixed scraper against the return side belt to scrape off deposits with the scraper plate, a brush type that makes the brush contact the return side belt, and a cleaning type that sprays high-pressure fluid. However, a scraper method with a simple structure and easy replacement is frequently 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 several millimeters occurs between the central portion and the end portion of the belt. In the case of a long PIC belt, replacement of the belt may not be performed all over the length due to cost and work time constraints, and there is an old belt with a heavily worn center and a new belt with no wear. Sometimes mixed. For belts with uneven wear, the height of the belt cleaner is adjusted to the largest wear part, but the pressing force is uneven in the belt width direction. Further, the endless part (joint part) of the belt peels off over time, and the endless end part peels off. Since the peeled portion protrudes from the return side belt surface, there is a risk of damaging the belt cleaner if the bending limit of the belt cleaner is exceeded. Further, if the pressing force of the belt cleaner is large, it causes belt wear and endless peeling promotion. Accordingly, the belt cleaner is indispensable for scraping off the deposits on the belt surface, but if it deviates from proper attachment and usage, the belt may be damaged and production may be hindered. 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) When the belt cleaner is attached to the surface of the return side belt, the scraper (chip) of the cleaner can be brought into precise contact with the unevenness in the width direction of the return side belt. (2) The chip follows the chip in accordance with the decrease in the scraping performance due to the wear of the chip, and can automatically recover the scraping performance. (3) In response to strong adhesion of the return belt and peeling of the endless part (connecting part), the tip bends greatly in the running direction of the return belt, and the obstacle is instantly passed to avoid damage to the belt cleaner. At the same time, it must be able to return to normal scraping status instantly. (4) The deposits can be reliably scraped off over a long period of time. (5) The tip has a long life, the belt cleaner has a long adjustment cycle and replacement cycle, and is easy to adjust and attach / remove. (6) No deposits adhere to the belt cleaner body or the amount of deposits is extremely small. A wide variety of belt cleaners have been proposed to satisfy the above characteristics, but no satisfactory method has been realized.

Japanese Patent Application Laid-Open No. 2013-142027 discloses a method in which a holding plate and a chip stick are pressed and fixed to a receiving plate of a long groove with a bolt. In this method, as the bolt is tightened and the presser plate is pressed, the push side plate falls down due to the reaction force of the bolt. Could not be restrained.

In the publication of Japanese Patent Laid-Open No. 2015-036327, a chip stick fixing portion is provided with a through hole in the width direction of the return side belt, the skewer is passed through the through hole, and fixing portions are provided at both ends of the skewer. A method is shown in which the stick is fixed and integrated, and the integrated chip stick is fixed to the long groove portion. In this method, when exchanging a specific stick, it is necessary to once pull the skewer from the chip stick, and the trouble at the time of exchanging is complicated. Further, if the bolts at both ends of the skewer were tightened too much, the upper end of the chip stick spread out in a fan shape, and a linear scraping residue was generated.

In Japanese Patent Application Laid-Open No. 2002-046851, a steel plate blade body brazed with a tip at the upper end of the blade is tilted forward at 165 °, and when the tip is bent by the frictional force of the belt, It shows how to keep the angle 90 °. In this method, it is difficult to hold the tip and belt at 90 ° because precise adjustment is required. Also, since the tip mounting portion is not bent but the blade made of steel plate is bent, the tip and the bent portion are largely separated from each other, so that a large moment acts on the bent portion, and the tip tilt angle increases. It was difficult to maintain °.

JP 2013-142027 PR JP2015-036327 Japanese Laid-Open Patent Publication No. 2002-046851

The present invention solves the following problems. (1) The rectangular elastic rubber body is easily replaced. (2) The rectangular rod-shaped rubber elastic body should not come out of the frame groove. (3) A rectangular rod-shaped rubber elastic body can be fixed from the outside of the belt conveyor. The height of the scraper of the belt cleaner can be adjusted without human beings entering the lower part of the return side belt. (4) Even if precise adjustment is not performed, the angle formed between the tip and the belt is always 90 ° or more to maintain the scraping ability to the maximum. (5) The tip automatically rises in accordance with the wear of the scraper (tip) so that the tip and the surface of the return side belt can always come into proper contact with each other. (6) The rectangular rod-shaped rubber elastic body can instantly avoid the protrusion on the return side belt. In addition, the elastic body made of a rectangular bar-shaped rubber is greatly bent so that it can be properly returned to the normal scraping position when the projection is avoided.

The first solution, as shown in patent claim 1, a plurality of square rod-shaped rubber elastic body, the belt cleaner that are arrayed in a groove of the frame disposed in the width direction of the return belt, said gantry is composed of at least the front plate and the rear side plate and a bottom plate or, et al., on the rear side plates, opposite to the longitudinal direction of the rear side plate, fixing the metal plate is attached, the fixing metal plate Is fixed with a fastening bolt that penetrates the through hole of the front plate and the through hole of the rear plate along the same center line, and a protrusion is provided in the longitudinal direction of the fixing metal plate, In the vicinity of the upper end of the rear plate, the rectangular bar-shaped rubber elastic body is brought into contact with the square bar-shaped rubber elastic body, the projection is pressed against the square bar-shaped rubber elastic body by the fastening bolt, and the square bar-shaped rubber elastic body is returned to the return plate. Opposite the direction of travel of the side belt A belt cleaner characterized in that it is tilted forward and pressed against the front plate, and is fixed so that the rectangular bar-shaped rubber elastic body does not come out of the groove by a frictional force received from the return side belt. It is.

The second solution means, as shown in claim 2, is a tip made of an abrasion-resistant material attached to the free end of the rectangular bar-shaped rubber elastic body, and the free end is connected to the tip of the tip. From the vicinity of the lower end, it is bent into a dogleg shape in the direction opposite to the traveling direction of the return side belt to form a one-step bent portion, and the protrusion of the fixing metal plate is made of the square bar rubber When pressed against the elastic body and applied with a pressing force, the square bar-shaped rubber elastic body is bent obliquely in a direction opposite to the traveling direction of the return side belt to form a two-step bent portion. When the bending force due to the frictional force in the traveling direction of the return side belt acts on the tip, the first step bending portion and the second step bending portion are opposed to the traveling direction of the return side belt. 1st moment each By allowed to rise to the second moment, a belt cleaner, wherein the angle formed the return belt and the chip is always perpendicular or obtuse.

According to a third solving means, as shown in claim 3, a tip made of a wear-resistant material is attached to a free end of the rectangular bar-shaped rubber elastic body, and the square bar-shaped rubber elastic body has the tip. A rectangular stick-shaped rubber, wherein the tip mounting portion is bent into a U-shape from the vicinity of the lower end of the tip in a direction opposite to the advancing direction of the return side belt. It is an elastic body.

According to a fourth solving means, as shown in claim 4, a through hole is provided in the width direction of the return belt of the rectangular bar-shaped rubber elastic body, and a flexible connecting rod is provided in the through hole. The rectangular rubber elastic body is connected through, a flexible thin plate is laid on the groove bottom, and a plurality of height adjustment bolts are rotatably attached to the groove bottom, and the height adjustment After the height of the rectangular bar-shaped rubber elastic body is adjusted by pushing up the thin plate and the fixed end of the rectangular bar-shaped rubber elastic body with a bolt, the fixing metal plate is attached to the rectangular bar-shaped rubber elastic body. The belt cleaner is characterized in that the rectangular bar-shaped rubber elastic body is pressed and fixed to the frame.

According to a fifth solving means, as shown in claim 5, a fixing shaft of a smooth cylinder is attached to the fixed end of the rectangular bar-shaped rubber elastic body in the central axis direction of the rectangular bar-shaped rubber elastic body. The fixing shaft is inserted into a holding guide hole provided in the bottom plate of the gantry, holds the rectangular bar-shaped rubber elastic body vertically, and a spring is attached to the fixing shaft. The quadrangular bar-shaped rubber elastic body is pushed upward by the spring, and the spring is contracted by pressing the quadrangular bar-shaped rubber elastic body against the return side belt so that the quadrangular bar-shaped rubber After the height of the elastic body is adjusted, the fixing metal plate is pressed against the rectangular bar-shaped rubber elastic body so that the square bar-shaped rubber elastic body is fixed to the gantry. Is Tokurina.

As the sixth solution means in patent claim 6, the flange of the frame, the return belt width direction in the through hole of are provided, the screw is provided in the through holes, in the screw A thrust bolt is rotatably attached in the width direction of the return side belt, and the thrust bolt is pressed against the rectangular bar-shaped rubber elastic body, so that the movement of the square bar-shaped rubber elastic body in the thrust direction is fixed. After that, the fixing metal plate is pressed against the rectangular bar-shaped rubber elastic body, and the rectangular bar-shaped rubber elastic body is fixed to the gantry.

According to a seventh solving means, as shown in claim 7, a spacer ring for inserting the fastening bolt is inserted between the rectangular bar-shaped rubber elastic body and the thrust bolt, and the spacer ring is After being pressed against the rectangular bar-shaped rubber elastic body by a thrust bolt, the fixing metal plate is pressed against the square bar-shaped rubber elastic body, and the square bar-shaped rubber elastic body is fixed to the gantry. It is a belt cleaner characterized by.

The effects of the first solving means are as follows. (1) Since the rectangular rod-shaped rubber elastic body is only inserted into the groove of the gantry, any rectangular rod-shaped rubber elastic body can be easily pulled out from the groove and replaced. (2) The rectangular bar-shaped rubber elastic body can be firmly fixed by tightening the front plate fixing metal plate with a tightening bolt and pressing the protrusion of the fixing metal plate against the rectangular bar-shaped rubber elastic body. (3) Since the tightening bolts are provided at both ends of the gantry, a rectangular rod-shaped rubber elastic body can be easily and safely secured by tightening the tightening bolt from the machine side of the conveyor without human beings under the conveyor gantry. Can be fixed to the mount. (4) Since the rectangular rod-shaped rubber elastic body is always elastically bent in the direction of travel of the return side belt due to the frictional force of the return side belt, it flexibly follows the unevenness of the return side belt and strong deposits. it can. Large deposits can be flexed instantaneously and can be avoided without damaging the return belt or the cleaner itself. (5) When the fixing metal plate is tightened with the tightening bolt, it is elastically deformed and presses the rectangular rubber elastic body, so that the tightening bolt is not loosened by vibration and the pressing force is not reduced.

The effects of the second solving means are as follows. (1) The rectangular rod-shaped rubber elastic body is pressed with a fixing metal plate in a direction opposite to the traveling direction of the return side belt, and the tip mounting portion is bent into a U shape, so that the tip and the belt are formed. Since an angle of 90 ° or more can always be ensured, efficient scraping performance can be maintained without depositing deposits after scraping between the tip and the return side belt. (2) The 1-step bending portion and the 2-step bending portion have a rigid rigid frame structure of a rectangular rod-shaped rubber elastic body having a uniform cross-sectional shape, and by an elastic force that causes the square rod-shaped rubber elastic body to bend. Since a resistance moment is generated by the drag, a strong scraping force can be exhibited. (3) A quadrangular bar-shaped rubber elastic body is formed with a one-step bent portion, and by a pressing force of the fixing metal plate, a two-step bent portion is formed at the action point of the upper end portion of the rear side plate. Since the bending strength of the rod-shaped rubber elastic body can be improved, the scraping performance can be improved.

The effects of the third solving means are as follows. (1) Since a single-step bent portion is formed at the tip mounting portion, a resistance moment due to the drag of the elastic force is generated by the ramen structure when receiving a frictional force in the traveling direction of the return side belt. Can do. (2) By storing the rectangular rod-shaped rubber elastic body in the groove of the frame, a two-step bent portion is formed in the pressing portion of the rectangular rod-shaped rubber elastic body by the fixing metal plate, and the resistance against the friction force of the return side belt Since the bending resistance moment can be increased by the bending resistance moment, the scraping performance can be improved. (3) By forming the bent portion of the square shape in the simple structure of a rectangular bar-shaped rubber elastic body, it becomes a ramen structure, a bending moment is formed, the bending rigidity against the frictional force of the return side belt is increased, and the scraping performance Can be improved.

The effects of the fourth solving means are as follows. (1) A through hole is provided in the width direction of the return side belt of the rectangular rod-shaped rubber elastic body, and a flexible connecting rod is passed through the through hole to connect the rectangular rod-shaped rubber elastic body; By laying a flexible thin plate at the bottom of the groove and pushing the thin plate up with a height adjustment bolt, the thin plate and the connecting rod bend in an arc shape at the same time, and the fixed-side end surfaces of the plurality of the rectangular rod-shaped rubber elastic bodies are fixed. Since it pushes up, the free-side terminal of the plurality of rectangular rod-shaped rubber elastic bodies can be formed in a smooth arc shape with a small number of height adjustment bolts. (2) After adjusting the height of the rectangular bar-shaped rubber elastic body with the height adjustment bolt, the fixing metal plate is pressed against the square bar-shaped rubber elastic body, so that the rectangular bar-shaped rubber elastic body can be easily removed from the conveyor side. Can be fixed to the gantry.

The effects of the fifth solving means are as follows. (1) When the free-side end of the rectangular bar-shaped rubber elastic body is pressed against the surface of the return side belt, the spring is bent so that the square bar-shaped rubber elastic body and the return side belt can be automatically brought into precise contact with each other. (2) As the quadrangular stick rubber elastic body wears, the quadrangular stick rubber elastic body is pushed up by the spring, and the quadrangular stick rubber elastic body and the return side belt are automatically maintained in an appropriate contact state. (3) Since the fixing shaft is attached to the stationary terminal, and the fixing shaft is inserted into the holding guide hole of the bottom plate, the rectangular bar-shaped rubber elastic body can be vertically and firmly attached to the gantry. (4) Since the rectangular bar-shaped rubber elastic body and the fixing shaft are integrated, the rectangular bar-shaped rubber elastic body and the pedestal can be accurately and easily simply inserted into the holding guide hole of the bottom plate. Can be assembled. (5) The rectangular bar-shaped rubber elastic body is pressed against the return side belt, the spring is contracted, and the height of the square bar-shaped rubber elastic body is adjusted, and then the fixing metal plate is fixed to the square bar-shaped rubber elastic body. By pressing against the body, it is possible to adjust the height of the rectangular bar-shaped rubber elastic body from the machine side of the belt conveyor and to fix it after the height adjustment.

The effects of the sixth solving means are as follows. (1) Since the rectangular rod-shaped rubber elastic body is fixed in the longitudinal direction of the groove of the frame, the square rod-shaped rubber elastic body is moved in the width direction (thrust direction) of the return side belt by the friction force of the return side belt. It became possible to prevent falling. (2) By pressing the quadrangular stick rubber elastic bodies in the thrust direction, there is no gap between the quadrangular stick rubber elastic bodies adjacent to each other, and the adjacent chips can be set accurately.

The effects of the seventh solving means are as follows. (1) The length of the thrust bolt can be shortened by the spacer ring. (2) Since the tightening bolt is inserted into the spacer ring, the tightening bolt and the spacer ring do not interfere with each other, so that the mounting height of the thrust bolt to the flange can be arbitrarily set. (3) Since the spacer ring is formed of a thin plate, the spacer ring is elastic and can absorb and mitigate the vibration of the thrust force acting on the rectangular bar-shaped rubber elastic body and the fall prevention plate. (4) When the square rod rubber elastic body or the fall prevention plate is pressed only with the thrust bolt, it is pressed at only one point, so there is a problem that the fall prevention plate tilts due to the thrust force of the return side belt, but the spacer ring Because the side of the return side belt is pressed with, the fall prevention plate does not tilt.

FIG. 3 is an overall perspective view in which a belt cleaner is partially sectioned. FIG. 3 is a perspective view in which a belt cleaner is partially sectioned. Fig. 3 is a detailed view of mounting a metal plate for fixing. These are various embodiments of the metal plate for fixing. FIG. 3 is a front view of a belt cleaner to which a fixing metal plate is attached. FIG. 3 is a partial sectional front view of a belt cleaner to which a fixing metal plate is attached. FIG. 3 is a cross-sectional view of a belt cleaner in which a free end of a rectangular bar-shaped rubber elastic body is bent. FIG. 3 is a schematic view of a shape change of a rectangular bar-shaped rubber elastic body. FIG. 3 is a side view of a rectangular bar-shaped rubber elastic body with a free end bent. FIG. 3 is a partial sectional front view of a belt cleaner provided with a height adjusting spring.

Embodiments of the present invention will be described with reference to claims 1 to 7 and FIGS. 1 to 10.

A first solution is a belt cleaner in which a plurality of rectangular rod-shaped rubber elastic bodies 20 are arranged in a groove 40 a of a gantry 40 disposed in the width direction of the return side belt 30 as shown in claim 1. in 10, the frame 40 is a rear side plate 42 and the bottom plate 43 or al structure with at least the front side plate 41, the rear side plate 42, opposite the longitudinal direction of the rear side plate 42, fixing the metal plate 50 is attached, and the fixing metal plate 50 is fixed by a fastening bolt 51 that penetrates the through hole 41a of the front side plate 41 and the through hole 42a of the rear side plate 42 along the same center line. A protrusion 50 a is provided in the longitudinal direction of the metal plate 50, and the protrusion 50 a is in contact with the rectangular bar-shaped rubber elastic body 20 in the vicinity of the upper end 42 b of the rear side plate 42. Projection 5 a is pressed against the rectangular rubber elastic body 20, and the rectangular rubber elastic body 20 is tilted forward in a direction opposite to the traveling direction of the return belt 30 and pressed against the front plate 41, The belt cleaner 10 is characterized in that a rectangular bar-shaped rubber elastic body 20 is fixed so as not to come out of the groove 40 a by a frictional force received from the return side belt 30.

As shown in FIG. 1, a belt cleaner 10 in which a plurality of rectangular rod-shaped rubber elastic bodies 20 are arranged in a groove 40 a of a gantry 40, and the free end 20 a of the square rod-shaped rubber elastic body 20 is wear-resistant. A chip 80 made of a conductive material is attached. The groove 40 a of the gantry 40 includes a front side plate 41, a rear side plate 42, a bottom plate 43, a flange 44, and a support pipe 45. The front side plate 41 is located upstream with respect to the traveling direction of the return side belt 30, and the rear side plate 42 is located downstream with respect to the traveling direction of the return side belt 30. The flange 44 connects the front side plate 41, the rear side plate 42, and the bottom plate 43, and is connected to the support pipe 45. The support pipe 45 is attached to an attachment base 46 for supporting the belt cleaner 10. The attachment base 46 is fixed to the belt conveyor base 47 or the like by welding or bolts, for example.

As shown in FIG. 2, a fixing metal plate 50 is attached to face the rear plate 42 of the gantry 40. The fixing metal plate 50 is attached by tightening bolts 51 penetrating through holes 41 a, 42 a, and 50 c made of the same center line provided in the front side plate 41, the rear side plate 42, and the fixing metal plate 50. Tightened. Two fastening bolts 51 are provided on both sides of the groove 40a. By providing the fastening bolts 51 on both sides of the groove 40a, the fastening work can be performed from the outside of the conveyor base, and the dangerous work at the lower part of the conveyor belt can be eliminated. The rectangular bar-shaped rubber elastic body 20 receives the friction force F of the return side belt 30 and is tilted in the traveling direction of the return side belt 30. Therefore, the fixing metal plate 50 is attached to the rear plate 42 on the downstream side with respect to the traveling direction of the return side belt 30 to support the falling of the quadrangular bar-shaped rubber elastic body 20 and to fix the quadrangular bar-shaped rubber elastic body 20. The square elastic rubber body 20 is pressed against the front side plate 41 and restrained from coming out of the groove 40a. The fixing metal plate 50 applies a pressing force to the rectangular bar-shaped rubber elastic body 20 in advance, thereby tilting the square bar-shaped rubber elastic body 20 forward in the direction opposite to the traveling direction of the return side belt 30. The bending rigidity of the rectangular rod-shaped rubber elastic body 20 can be increased.

As shown in FIG. 3, the pressing surface 50 b of the protrusion 50 a of the fixing metal plate 50 presses the rectangular rod-shaped rubber elastic body 20 in the vicinity of the upper end 42 b of the rear side plate 42. By making the through hole 50c of the fixing metal plate 50 into a long hole, the pressing portion C of the rectangular bar-shaped rubber elastic body 20 can be changed in the vertical direction. By changing the position of the pressing portion C of the quadrangular bar-shaped rubber elastic body 20, the bending rigidity of the quadrangular bar-shaped rubber elastic body 20 can be adjusted. When the position of the pressing portion C is increased, the forward tilt amount of the rectangular bar-shaped rubber elastic body 20 is increased, and the fall due to the frictional force of the return side belt 30 can be reduced.

As shown in FIG. 4, the fixing metal plate 50 can have various modes. For example, as shown in FIG. 4A, one side of the angle of JIS G 3192 can be cut to an appropriate length to form the protrusion 50a, or the protrusion 50a can be formed by bending a metal plate. . Further, by forming the protrusions, it is possible to increase the rigidity against bending in the traveling direction of the return side belt 30 of the fixing metal plate 50. FIG. 4B shows a structure in which a protrusion 50a is welded in the middle of a vertical metal plate to increase the bending rigidity of the fixing metal plate 50 in the traveling direction of the return side belt 30. FIG. FIG. 4C is a view in which a vertical metal is welded to the protrusion 50 a to further increase the bending rigidity of the fixing metal plate 50 in the traveling direction of the return side belt 30. In FIG. 4D, the tip 50b of the protrusion 50a is chamfered, and the surface pressure is increased to increase the biting of the tip 50b. Further, a fulcrum protrusion 50d is provided at the lower part of the fixing metal plate 50. With the fulcrum protrusion 50d as a fulcrum, the protrusion 50a can reliably press the rectangular bar-shaped rubber elastic body 20. In FIG. 4E, the metal plate is bent into an arch shape to form a projection 50a and a fulcrum projection 50d, and the metal plate 50 is molded. By forming the fixing metal plate into an arch shape, the rigidity of the fixing metal plate 50 is improved, and the protrusion 50a can be strongly pressed against the rectangular bar-shaped rubber elastic body 20 with the fulcrum protrusion 50d as a fulcrum. The fixing metal plate 50 has a function as a leaf spring, and can apply a pressing force flexibly in accordance with the movement of the rectangular bar-shaped rubber elastic body 20.

As the material of the fixing metal plate 50, an iron plate, a SUS plate, or the like can be used. As shown to Fig.4 (a), the thickness t of the metal plate 50 for fixation is 5-9 mm. The length b of the protrusion 50a is 8 to 15 mm. The length h of the fixing metal plate 50 is 20 to 60 mm. A clamping margin S is provided between the rear plate 42 and the fixing metal plate 50. By adjusting the tightening allowance S, it is possible to adjust the pressing force and the forward tilt amount of the rectangular bar-shaped rubber elastic body 20 by the fixing metal plate 50.

The rectangular rod-shaped rubber elastic body 20 needs to have a pressing force for pressing the free side terminal 20b against the return side belt 30 and needs to flexibly follow the delicate unevenness of the return side belt 30. For this reason, the rectangular bar-shaped rubber elastic body 20 uses rubber. As the rubber, for example, natural rubber, synthetic natural rubber, styrene, butadiene rubber, chloroprene rubber, acrylic rubber, nitrile rubber, urethane rubber, fluorine rubber, or the like can be used.

The cross section of the rectangular rod-shaped rubber elastic body 20 is a quadrangle as shown in FIG. The width W1 in the width direction of the return side belt 30 and the width W2 in the advancing direction of the return side belt 30 of the elastic body 20 made of a square bar rubber are preferably 10 to 30 mm. If the width W1 is 10 mm or less, the rigidity is weak and the scraping ability is small. If it exceeds 30 mm, the rigidity increases, the deflection of the return side belt 30 in the traveling direction decreases, and it does not follow the small irregularities flexibly, and also precisely contacts the small irregularities in the width direction of the return side belt 30. The scraping performance decreases. Therefore, when the rigidity of the rectangular rod-shaped rubber elastic body 20 in the traveling direction of the return side belt 30 is increased, the width W2 should be larger than the width W1. The length L of the rectangular rod-shaped rubber elastic body 20 is preferably 50 to 300 mm. As shown in FIG. 2, the length L is the length from the upper surface 41 b of the front side plate 41 to the free side terminal 20 a of the rectangular bar-shaped rubber elastic body 20. 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 the conventional belt cleaner, a scraper plate with a chip attached to a rubber elastic plate or metal plate having a width of about 100 to 500 mm is the mainstream, and the width of the scraper plate is too wide so that the entire surface of the chip is uniform on the surface of the return belt 30. It was impossible to abut and scraping was left behind. Further, if the scraper is forced to come into contact with the return side belt 30 in order to eliminate the scraping residue, the pressing force increases, so that the return side belt 30 is worn and peeling of the endless portion (protrusions) is promoted. Or damaged the belt. In order to solve this problem, the width W1 of the rectangular bar-shaped rubber elastic body 20 is made as small as possible so that the free-side end 20a of the square bar-shaped rubber elastic body 20 uniformly presses the surface of the return side belt 30, and the belt It is indispensable to avoid the 30 protrusions instantly and to return to the normal position instantly after the avoidance.

As shown in detail in FIG. 9, the free end 20 a of the rectangular rod-shaped rubber elastic body 20 has a scraping performance or extends the life against wear of the rectangular rod-shaped rubber elastic body 20. It is desirable to attach a wear resistant tip 80. The chip 80 is attached to the side surface 20 b facing the traveling direction of the return side belt 30 with a bolt 81 with a reinforcing plate 82 interposed therebetween. There are various other methods for attaching the chip 80 to the rectangular bar-shaped rubber elastic body 20, for example, an attachment method in which the chip 80 is embedded in the rectangular bar-shaped rubber elastic body 20 by a mold forming method. is there.

The material of the chip 80 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, or 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.

According to a second solving means, as shown in claim 2, a tip 80 made of a wear-resistant material is attached to the free-side end 20a of the rectangular bar-shaped rubber elastic body 20, and the free-side end 20a is The tip 80 is bent from the vicinity of the lower end 80a of the tip 80 in a direction opposite to the traveling direction of the return belt 30 to form a one-step bent portion C, and the fixing metal plate 50 When the protrusion 50a is pressed against the rectangular bar-shaped rubber elastic body 20 and a pressing force F1 is applied, the square bar-shaped rubber elastic body 20 is inclined in a direction opposite to the advancing direction of the return side belt 30. Are bent to form a two-step bent portion A, and when the bending force due to the frictional force F in the traveling direction of the return side belt 30 acts on the tip 80, the first-step bent portion C and the two-step bent portion A are formed. In step bend A By generating a first moment M1 and a second moment M2 in directions opposite to the traveling direction of the return side belt 30, the angle θ1 formed by the return side belt 30 and the tip 80 is always vertical. Alternatively, the belt cleaner 10 has an obtuse angle.

  FIG. 8 schematically shows changes in the shape of the rectangular rod-shaped rubber elastic body 20 when receiving the frictional force F of the return side belt 30 and the pressing force F <b> 1 by the fixing metal plate 50. A point is a contact point between the rectangular rod-shaped rubber elastic body 20 and the upper end 42b of the rear side plate 42, which is a two-step bent portion. Point B is a contact point between the rectangular bar-shaped rubber elastic body 20 and the tip 50b of the protrusion 50a of the fixing metal plate 50. Point C is a one-step bent portion and is formed in the vicinity of the lower end 80 a of the chip 80. Point D is a contact point between the tip 80 and the return side belt 30.

FIG. 8 shows the rectangular rod-shaped rubber elastic body 20 as a beam model fixed on one side. 8A, 8 </ b> B, and 8 </ b> C schematically illustrate a case where the free-side end 20 a of the rectangular rod-shaped rubber elastic body 20 is bent into a dogleg shape in a direction opposite to the traveling direction of the return side belt 30. It is shown in FIG. 8A shows a state in which the frictional force F of the return side belt 30 and the pressing force F1 of the fixing metal plate 50 are not applied to the rectangular bar-shaped rubber elastic body 20. FIG. 8B shows a state in which the protrusion 50a tip 50b of the fixing metal plate 50 is pressed and a pressing force F1 is applied to the rectangular bar-shaped rubber elastic body 20. FIG. By the pressing force F1, the rectangular rod-shaped rubber elastic body 20 can be tilted in the direction opposite to the traveling direction of the return side belt 30, and a bending resistance force can be generated against the frictional force of the return side belt 30. FIG. 8C shows a state in which the pressing force F1 is applied to the rectangular rod-shaped rubber elastic body 20, and the frictional force F in the traveling direction of the return side belt 30 is applied to the tip 80.

Due to the frictional force F and the pressing force F1, a moment M1 is generated in the first-step bending portion C and a moment M2 is generated in the two-step bending portion A. For this reason, from the point A to the point C, the rectangular rod-shaped rubber elastic body 20 has a bent shape that protrudes in a direction opposite to the traveling direction of the return side belt 30. The angle θ1 formed between the tip 80 and the return side belt 30 forms an obtuse angle. When θ1 is an obtuse angle, as in the case of cutting with a lathe, the degree of peeling of the adhered material after scraping is improved, and the scraping efficiency is increased.

FIG. 8D shows a case where the free-side end 20a of the rectangular rod-shaped rubber elastic body 20 has no dogleg-shaped bend and the pressing force by the fixing metal plate 50 is not applied. FIG. 8E shows a state in which the frictional force F acts on the chip 80 and the rectangular bar-shaped rubber elastic body 20 is bent. The angle θ2 formed between the tip 80 and the return side belt 30 is an acute angle. In such a case, the scraped material is clogged between the chip 80 and the return side belt 30, and the scraping efficiency is reduced.

In the invention of Patent Document 3, the tip is inclined in a direction opposite to the traveling direction of the return side belt, but is not bent from the base of the tip as in the present application, but is a blade body leg portion far from the tip. The bending resistance is reduced, and the model is similar to the model shown in FIG. 8E, and the angle θ2 formed by the tip 80 and the belt is an acute angle, so that the adhered matter after scraping between the tip 80 and the return side belt 30 is removed. There is a problem in that it accumulates and scraping efficiency decreases.

According to a third solution, as shown in claim 3, a tip 80 made of a wear-resistant material is attached to the free-side end 20a of the rectangular bar-shaped rubber elastic body 20, and the square bar-shaped rubber elastic body The mounting portion of the chip 80 of the body 20 is bent from the vicinity of the lower end 80a of the chip 80 into a square shape in a direction opposite to the traveling direction of the return side belt 30. Elastic body 20.

FIG. 9 shows a rectangular rubber elastic body 20 in which the free end 20a, that is, the tip mounting portion is bent into a dogleg shape to form a one-step bent portion C immediately below the tip and the tip 80 is attached. Is shown. The chip 80 is fixed to the rectangular bar-shaped rubber elastic body 20 by bolts 81. It is desirable to assist the rigidity of the chip 80 by inserting an auxiliary plate 82 between the chip 80 and the rectangular bar-shaped rubber elastic body 20.

The bend angle θ3 of the center axis 20c of the rectangular rod-shaped rubber elastic body 20 and the free end 20a having a dogleg shape is suitably 5 to 15 degrees. If θ3 is smaller than 5 degrees, the angle θ1 formed by the tip 80 and the return side belt 30 becomes an acute angle, and the scraping ability is reduced. In addition, deposits after scraping accumulate between the tip 80 and the return side belt 30, and the contact property between the tip 80 and the return side belt 30 is lowered, resulting in a further reduction in scraping performance. If θ3 is greater than 15 degrees, there is a risk that the risk of the tip 80 damaging the return side belt 30, a strong deposit, endless turning, or the like cannot be avoided instantaneously.

By bending the free-side end 20a to which the chip 80 of the rectangular rod-shaped rubber elastic body 20 is attached into a U-shape, a one-step bent portion C is formed. When receiving a frictional force, a resistance moment due to the drag of the elastic force can be generated. For this reason, the angle θ1 formed by the tip 80 and the return side belt 30 can be formed as an obtuse angle. Further, by housing the rectangular rubber elastic body 20 in the groove 40a of the gantry 40, a two-step bent portion A is formed in the groove fixing portion, and a synergistic effect with the one-step bent portion C allows the return side belt 30 to A drag force is generated against the frictional force, and the bending resistance can be increased by the bending resistance moment, so that the scraping performance can be improved. In addition, by incorporating a square-shaped ramen structure into the simple rod-shaped structure of the rectangular rod-shaped rubber elastic body 20, a large bending resistance can be generated, and the scraping performance can be dramatically improved by the repulsive force.

There are various methods for forming the free-side end 20a of the rectangular bar-shaped rubber elastic body 20 into a dogleg shape. For example, there is a method in which the free-side end 20a of the rectangular bar-shaped rubber elastic body 20 is corrected with a jig or the like, and is left in a room temperature or high temperature environment in a state where it is bent into a dogleg shape and then creeped. There are also a method of cutting a rubber plate into a U-shape and a method of manufacturing by molding with a U-shaped mold.

According to a fourth solution, as shown in claim 4, a through hole 20d is provided in the width direction of the return side belt 30 of the rectangular bar-shaped rubber elastic body 20, and a flexible hole is provided in the through hole 20d. A certain connecting rod 71 is penetrated to connect the rectangular rod-shaped rubber elastic body 20, a flexible thin plate 70 is laid on the groove bottom 43 a, and a plurality of height adjusting bolts 60 are provided on the groove bottom 40 a. After the thin plate 70 and the fixed end 20e of the rectangular bar-shaped rubber elastic body 20 are pushed up by the height adjusting bolt 60 and the height of the rectangular bar-shaped rubber elastic body 20 is adjusted. The belt cleaner 10 is characterized in that the fixing metal plate 50 is pressed against the rectangular bar-shaped rubber elastic body 20, and the square bar-shaped rubber elastic body 20 is fixed to the gantry 40.

FIG. 5 is a partial cross-sectional view of the front of the belt cleaner 10 in which the rectangular rod-shaped rubber elastic body 20 is fixed to the gantry 40 with the fixing metal plate 50 and the height adjusting bolt 60 and the height adjusting thin plate 70 are provided. It is. The rectangular rod-shaped rubber elastic body 20 is fixed to the gantry 40 with a fixing metal plate 50. A thin plate 70 is laid on the bottom plate 43. When the height adjustment bolt 60 is raised and the thin plate 70 is raised, the fixed-side terminals 20e of the plurality of rectangular rod-shaped rubber elastic bodies 20 are simultaneously pushed up with the height adjustment bolt 60 as a vertex. That is, it is possible to push up the plurality of rectangular bar-shaped rubber elastic bodies 20 into a smooth arc shape with one height adjusting bolt 60. The connecting rod 71 is bent into a convex arc shape and restrains the rectangular rod-shaped rubber elastic body 20 from spreading in the width direction of the return side belt 30. After adjusting the height of the rectangular bar-shaped rubber elastic body 20, the fastening bolt 51 of the fixing metal plate 50 is tightened, and the protrusion 50a of the fixing metal plate 50 is pressed against the rectangular bar-shaped rubber elastic body 20, thereby making the rectangular bar-shaped rubber elastic body 20. The elastic body 20 is fixed to the gantry 40.

As shown in FIG. 6, when the fall prevention plate 21 is provided, it is attached to both sides of the rectangular rod-shaped rubber elastic bodies 20 arranged on the gantry 40. Since the width W3 of the return side belt 30 in the width direction of the fall prevention plate 21 is wider than the width W1 of the rectangular bar-shaped rubber elastic body 20, the rigidity in the width direction of the return side belt 30, that is, in the thrust direction is great. When one point of the plate 21 is pressed by the thrust bolt 90, a uniform pressing force is transmitted to the square bar-shaped rubber elastic body 20, and the quadrangular bar-shaped rubber elastic body 20 can be prevented from falling in the thrust direction. Further, when the return side belt 30 meanders, even if the return side belt 30 protrudes from the range of the rectangular bar-shaped rubber elastic body 20, it can be supported by the fall prevention plate 21, so that the return side belt 30 is prevented from being damaged. Can do. Since the falling prevention plate 21 can prevent the quadrangular bar-shaped rubber elastic body 20 from falling in the thrust direction, the gap between the adjacent quadrangular bar-shaped rubber elastic bodies 20 does not widen, thereby preventing streaks from being left behind.

A fall prevention plate 21 is provided on both sides of the rectangular bar-shaped rubber elastic body 20, and the square bar rubber elastic body 20 and the fall prevention plate 21 are fixed to the gantry 40 with a fixing metal plate 50. It is the figure which carried out the partial cross section of the front of the belt cleaner 10 which provided the floor board 70 for thickness adjustment, and the thrust volt | bolt 90. FIG. The thrust bolt 90 is for restraining the movement in the thrust direction of the rectangular rod-shaped rubber elastic body 20 and the fall prevention plate 21. By adjusting the height of the height adjusting bolt 60 and the height adjusting floor plate 70, the height of the rectangular rubber elastic body 20 is adjusted, and after adjusting the height of the rectangular rubber elastic body 20, the thrust bolt 90 is lightly tightened. Thus, the movement in the width direction of the return side belt 30 of the fall prevention plate 21 and the rectangular bar-shaped rubber elastic body 20 is restrained. The thrust bolt 90 may be lightly pressed to such an extent that the gap between the adjacent rectangular rod-shaped rubber elastic bodies is eliminated. Thereafter, the rectangular bar-shaped rubber elastic body 20 is fixed to the gantry 40 with the fastening bolts 51 of the fixing metal plate 50 so that the friction force of the return side belt 30 does not cause the groove 40 a to come out.

According to a fifth solving means, as shown in claim 5, a smooth cylindrical fixing shaft 22 is provided at the fixed end of the rectangular bar-shaped rubber elastic body 20 in the direction of the central axis 20 c of the rectangular bar-shaped rubber elastic body. The fixing shaft 22 is inserted into a holding guide hole 43b provided in the bottom plate 43 of the gantry 40, holds the rectangular bar-shaped rubber elastic body 20 vertically, and A spring 23 is inserted into the fixing shaft 22, and the square bar-shaped rubber elastic body 20 is pushed upward by the spring 23, and the square bar-shaped rubber elastic body 20 is pressed against the return side belt 30. Thus, after the spring 23 is contracted and the height of the rectangular bar-shaped rubber elastic body 20 is adjusted, the fixing metal plate 50 is fixed to the square bar-shaped rubber elastic body 20. Pressed, a belt cleaner 10, characterized in that the square rod-shaped rubber elastic body 20 is fixed to the frame 40.

As shown in FIG. 10, when the rectangular rod-shaped rubber elastic body 20 is pressed against the return side belt 30 by the elastic force of the spring 23, the spring 23 contracts in accordance with the unevenness of the return side belt 30, and the square rod-shaped rubber elastic body is formed. Since 20 abuts precisely on the return side belt 30, the height of the elastic body 20 made of a square bar rubber can be automatically set. Thereafter, the rectangular bolt rubber elastic body 20 can be securely fixed to the gantry 40 by tightening the tightening bolt 51 and pressing the fixing metal plate 50 against the rectangular bar rubber elastic body 20. The square bar-shaped rubber elastic body 20 is pulled in the direction of movement of the return side belt 30 by the frictional force in the direction of travel of the return side belt 30, but the quadrangular bar rubber elastic body 20 is attached to the fixing metal plate 50 and the front side plate 41. Since it is firmly sandwiched, it does not come out of the groove 40a of the gantry 40.

In order to set the belt cleaner 10 on the return side belt 30, first, the gantry 40 is pushed up until it contacts the surface of the return side belt 30. Next, corresponding to the unevenness of the return side belt, the springs 23 attached to the rectangular bar-shaped rubber elastic bodies are compressed using the fixing shaft 22 as a guide, and the square bar-shaped rubber elastic body 20 is compressed to the return side belt 30. Press on. By bending the spring 23, the rectangular bar-shaped rubber elastic body 20 can precisely contact the return side belt 30 with an appropriate pressing force against the unevenness in the width direction of the return side belt 30. Thereafter, the rectangular bar-shaped rubber elastic body 20 is firmly sandwiched between the fixing metal plate 50 and the front side plate 41, whereby the rectangular bar-shaped rubber elastic body 20 is fixed to the gantry 40. By this method, even if the operator does not enter the lower part of the return side belt 30, the height of the rectangular rubber elastic body 20 can be adjusted and fixed to the frame, and the belt cleaner 10 can be secured in terms of safety and environment. Installation work can be greatly improved.

The smooth cylindrical fixing shaft 22 attached to the rectangular rod-shaped rubber elastic body 20 can use a metal rod such as carbon steel, SUS, titanium, or copper, or a resin such as plastic. The diameter of the fixing shaft 22 is preferably 3 to 10 mm. If it is thinner than 3 mm, there is a risk of bending due to the thrust force or horizontal force due to the frictional force of the return side belt 30. On the other hand, if it is thicker than 10 mm, the diameter of the holding guide hole 43b of the bottom plate 43 of the gantry 40 becomes large, and there is a problem that the rigidity of the bottom plate 43 is lowered. The fixing shaft has a smooth cylindrical shape and needs to slide smoothly through a holding guide hole provided in the bottom plate.

The fixing shaft 22 can be attached to the quadrangular bar-shaped rubber elastic body 20 by providing a hole in the quadrangular bar-shaped rubber elastic body 20, inserting the fixing shaft 22, and joining them with an adhesive. Further, when the rectangular bar-shaped rubber elastic body 20 is molded with a mold, the fixing shaft 22 is set in advance in the mold so that the square bar-shaped rubber elastic body 20 and the fixing shaft 22 are integrally molded. be able to.

The inner diameter of the spring 23 is preferably 4 to 12 mm. If it is thinner than 4 mm, it will come into contact with the fixing shaft 22 and hinder expansion and contraction. If it is thicker than 12 mm, it interferes with the adjacent spring 23 and hinders expansion and contraction. The expansion / contraction amount of the spring 22 is preferably 5 to 30 mm. If it is 5 mm or less, it will be smaller than the amount of unevenness on the surface of the return side belt 30 and precise contact will not be possible. If it is larger than 30 mm, there arises a problem that the rectangular rod-shaped rubber elastic body 20 is completely pulled out by the frictional force in the traveling direction of the return side belt 30. Stainless steel or spring steel is suitable for the material of the spring 23.

By inserting the spring 23 into the fixing shaft 22 attached to the rectangular bar-shaped rubber elastic body 20, and inserting it into the holding guide hole 43b of the bottom plate 43, the height adjustment of the rectangular bar-shaped rubber elastic body 20 can be easily performed. Moreover, it can be made precise. By accurately drilling the holding guide holes 43b in the bottom plate 43 of the gantry 40, the rectangular bar-shaped rubber elastic bodies 20 can be arranged in the grooves 40a of the gantry 40 with high accuracy. The clearance between the holding guide hole 43b and the fixing shaft 22 is preferably 0.1 to 1.0 mm. If smaller than 0.1 mm, the expansion and contraction of the spring 23 is obstructed by the friction between the holding guide hole 43 b and the fixing shaft 22. If it is larger than 1.0 mm, the fixing shaft 22 cannot be held vertically. By keeping the clearance small, it is possible to keep the rectangular rod-shaped rubber elastic body 20 substantially vertical and prevent rattling and falling in the thrust direction.

The sixth solving means as shown in claims 6 and flange 44 of the frame 40, the width direction in the through hole 44a of the return belt 30 is provided, the screw 91 in the through hole 44a is A thrust bolt 90 is rotatably attached to the screw 91, and the thrust bolt 90 is pressed against the rectangular bar-shaped rubber elastic body 20, so that the square bar-shaped rubber elastic body 20 moves in the thrust direction. After the belt is fixed, the fixing metal plate 50 is pressed against the rectangular bar-shaped rubber elastic body 20, and the square bar-shaped rubber elastic body 20 is fixed to the gantry 40. It is.

  6 and 10 are cross-sectional views of the belt cleaner 10 in which flanges 44 having through holes 44a are provided on both sides of the gantry 40, nuts 91 are attached to the flanges 44 to form screws 91, and thrust bolts 90 are screwed together. FIG. The screw 91 may be formed by directly tapping the through hole 44a. Alternatively, the screw 91 may be formed by welding a nut 91 as shown in FIGS. The flange 44 is fixed by welding so that the front side plate 41, the rear side plate 42, and the bottom plate 43 are integrated.

The quadrangular bar-shaped rubber elastic body 20 always receives a strong frictional force (thrust force) from the return side belt 30 in the width direction of the return side belt 30, that is, the thrust direction. Therefore, the free-side end 20a of the rectangular rod-shaped rubber elastic body 20 swings in the thrust direction, and a gap is generated between the adjacent rectangular rod-shaped rubber elastic bodies 20. When this gap becomes large, streaky scraping remains are generated on the surface of the return side belt 30, and the scraping performance deteriorates. The thrust bolt 90 can prevent a phenomenon in which the rectangular rod-shaped rubber elastic body 20 swings in the thrust direction, so that no streaked scrap remains.

As shown in FIG. 10, spacers 24 may be inserted into adjacent gaps of the rectangular rod-shaped rubber elastic body 20. When the thrust bolt 90 is pressed in the thrust direction, there is a problem that the rectangular rubber elastic bodies 20 come into strong contact with each other and the swinging motion of the swinging portion 25 outside the groove 40a is hindered. By inserting the spacer 24, the fixing portions 26 in the groove 40a are pressed against each other and the movement in the thrust direction is fixed, but a gap remains in the swinging portion 25 outside the groove 40a. The swinging part 25 of the body 20 can swing smoothly.

As a seventh solution, as shown in claim 7, a spacer ring 92 for inserting the fastening bolt 51 is inserted between the rectangular bar-shaped rubber elastic body 20 and the thrust bolt 90. After the spacer ring 92 is pressed against the square bar-shaped rubber elastic body 20 by the thrust bolt 90, the fixing metal plate 50 is pressed against the square bar-shaped rubber elastic body 20, and the square bar-shaped rubber elastic body is pressed. The belt cleaner 10 is characterized in that 20 is fixed to the mount 40.

As shown in FIG. 10, a spacer ring 92 is inserted between the fall prevention plate 21 and the thrust bolt 90. As shown in FIG. 10, the spacer ring can be formed by forming a thin plate such as a metal plate or resin into a ring shape and taking the fastening bolt 51 inside the ring. The spacer ring 92 can shorten the length of the thrust bolt 90. Further, since the fastening bolt 51 is inserted into the spacer ring 92, the fastening bolt 51 and the spacer ring 92 do not interfere with each other, so that the mounting height of the thrust bolt 90 to the flange 44 can be arbitrarily set. Further, since the spacer ring 92 is formed of a thin plate, the spacer ring 92 is elastic and can absorb and mitigate the vibration of the thrust force acting on the fall prevention plate 21. Further, when the fall prevention plate 21 is pressed only by the thrust bolt 90, it is pressed at only one point, so there is a problem that the fall prevention plate 21 is inclined due to the thrust force of the return side belt 30. However, the spacer ring 92 faces the return side belt. Since the side surface 30 is pressed, the fall prevention plate 21 does not tilt.

10: Belt cleaner 20: Square bar rubber elastic body 20a: Free side terminal 20b (of the square bar rubber elastic body): Side face 20c (opposite to the traveling direction of the return side belt of the square bar rubber elastic body): Center Shaft 20d: Through hole 20e: Fixed side terminal 21 (of a rectangular rubber elastic body): Falling prevention plate 22: Fixing shaft 23: Spring 24: Spacer 25: Swing part 26: Fixing part 30: Return side belt 40 : Base 40a: Groove 41: Front side plate 41a: Through hole 42 (of front side plate): Rear side plate 42a: Through hole 42b (of rear side plate): Upper end 43 of rear side plate: Bottom plate 43a: Through hole 43b (of bottom plate): (Bottom plate) holding guide hole 44: flange 44a: through hole 45: support pipe 46: belt cleaner mounting base 47: belt conveyor mount 50: fixing metal plate 50a: protrusion 50b: tip 5 0c: Through hole 50d: (For fulcrum) Projection 51: Tightening bolt 52: Nut 60: Height adjustment bolt 61: Nut 70: Thin plate 71: Connecting rod 80: Tip 80a: (Tip) lower end 81: Bolt 82: Reinforcing plate 90: Thrust bolt 91: Nut 92: Spacer ring W1: Width W2 (of the rectangular rod-shaped rubber elastic body in the width direction of the return side belt): Width W3 (of the square rod-shaped rubber elastic body in the direction of travel of the return side belt) : Width L (of the fall prevention plate): Length t of the rectangular rubber elastic body t: Thickness of the fixing metal plate h: Length of the fixing metal plate b: Length of the protrusion of the fixing metal plate s: Fixing Tightening allowance of metal plate A: Two-step bent portion B: Action point of protrusion tip of fixing metal plate C: One-step bent portion D; Contact point F between tip and return side belt F: Friction force F1 of return side belt Metal plate pressing force M1: acting on point C The first moment M2 that: the second moment θ1 acting on point A: an angle formed by the chip and the return belt (obtuse angle)
θ2: Angle formed by tip and return side belt (acute angle)
θ3: Bending angle of a rectangular rod-shaped rubber elastic body

Claims (7)

A plurality of square rod-shaped rubber elastic body, the belt cleaner that are arrayed in a groove of the frame disposed in the width direction of the return belt, said frame is composed of at least the front plate and the rear side plate and the bottom plate or al A fixing metal plate is attached to the rear side plate so as to face the longitudinal direction of the rear side plate, and the fixing metal plate includes a through hole in the front side plate and a through hole in the rear side plate. Are fixed by fastening bolts that pass through the same center line, and a protrusion is provided in the longitudinal direction of the fixing metal plate, and the protrusion is in the vicinity of the upper end of the rear plate, and the elastic made of the rectangular bar rubber The protrusion is pressed against the rectangular bar-shaped rubber elastic body by the clamping bolt, and the square bar-shaped rubber elastic body tilts forward in a direction opposite to the traveling direction of the return side belt, and Pressed against the front plate Belt cleaner wherein the square rod-shaped rubber elastic body, characterized in that it is fixed so as not to slip out from the groove by frictional force from the return belt. A tip made of an abrasion-resistant material is attached to the free end of the rectangular rod-shaped rubber elastic body, and the free end is located near the lower end of the tip in a direction opposite to the traveling direction of the return side belt. Bent into a U-shape to form a one-step bent portion, and the protrusion of the metal plate for fixing is pressed against the elastic body made of rubber from a rectangular bar, and a pressing force is applied, The quadrangular rod-shaped rubber elastic body is bent obliquely in a direction opposite to the traveling direction of the return side belt to form a two-step bent portion, and the bending force due to the frictional force in the traveling direction of the return side belt is When acting on the tip, a first moment and a second moment are generated in the first-step bending portion and the two-step bending portion in directions opposite to the traveling direction of the return side belt, respectively. Belt cleaner according to claim 1, wherein the Ri side belt and the tip angle to form is always perpendicular or obtuse. A tip made of an abrasion-resistant material is attached to the free end of the rectangular bar-shaped rubber elastic body, and the tip mounting portion of the square bar-shaped rubber elastic body is returned from the vicinity of the lower end of the chip. The quadrangular bar-shaped rubber elastic body according to claim 2, wherein the one-step bent portion is formed by being bent into a dogleg shape in a direction opposite to the traveling direction of the side belt. A through hole is provided in the width direction of the return side belt of the rectangular bar-shaped rubber elastic body, a flexible connecting rod is passed through the through hole , and the rectangular bar-shaped rubber elastic body is connected, A flexible thin plate is laid on the groove bottom, and a plurality of height adjustment bolts are rotatably attached to the groove bottom. The height adjustment bolt is used to fix the thin plate and the rectangular rubber elastic body. After the terminal is pushed up and the height of the rectangular bar-shaped rubber elastic body is adjusted, the fixing metal plate is pressed against the square bar-shaped rubber elastic body, and the square bar-shaped rubber elastic body is pressed against the gantry. The belt cleaner according to claim 1, wherein the belt cleaner is fixed. A fixed shaft of a smooth cylinder is attached to the fixed end of the rectangular bar-shaped rubber elastic body in the central axis direction of the rectangular bar-shaped rubber elastic body, and the fixing shaft is provided on the bottom plate of the gantry. Inserted into the holding guide hole, and holds the rectangular bar-shaped rubber elastic body vertically, and a spring is inserted into the fixing shaft, and the square bar-shaped rubber elastic body is the spring. And the rectangular elastic rubber body is pressed against the return side belt, the spring is contracted, and the height of the rectangular elastic rubber body is adjusted. 2. The belt cleaner according to claim 1, wherein a metal plate is pressed against the rectangular bar-shaped rubber elastic body, and the square bar-shaped rubber elastic body is fixed to the frame. The flange of the frame, the return belt width direction in the through hole is provided in the screw is provided in the through-hole, the said screw rotatably thrust bolt in the width direction of the return belt After the thrust bolt is pressed against the rectangular rod-shaped rubber elastic body and the movement of the square rod-shaped rubber elastic body in the thrust direction is fixed, the fixing metal plate is elastic to the rectangular rod-shaped rubber elastic body. The belt cleaner according to claim 1, 4 or 5, wherein the elastic body made of a rectangular bar-shaped rubber is pressed against a body and fixed to the frame. After a spacer ring for inserting the fastening bolt is inserted between the rectangular bar-shaped rubber elastic body and the thrust bolt, and after the spacer ring is pressed against the square bar-shaped rubber elastic body by the thrust bolt the fixing metal plate is pressed against the square rod-shaped rubber elastic body, the square belt cleaner 請 Motomeko 6 wherein you characterized in that rod-like rubber elastic member is fixed to the frame.