JP2017119579A - Belt cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem in that: since fine sticking matter adheres to recesses in and projections on a belt surface, simply by accurately bringing chips into contact with the belt surface does not suffice to scrape the matter; in a cleaner with chips attached to a narrow square bar-like rubber elastic body, a streak residue of scrape occurs if a gap is caused between adjacent chips, resulting in incomplete scrape of adhering matter; accurate contact of chips with a deformed belt is difficult, which causes slip of adhering matter from a gap between chip and the belt, resulting in a residue of scrape.SOLUTION: Two belt cleaners, front and rear, are provided in parallel in a belt advancing direction.Front belt cleaner chips and rear belt cleaner chip are disposed in zigzag and overlapped, thereby preventing a streaky residue of scrape. In addition, a thin plate is laid on a frame bottom and a thin plate is pushed up with height adjustment bolts, thereby accurately bringing the chips into contact with a belt surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an attachment jig for attaching a belt cleaner to a conveyor base in a belt cleaner that scrapes off deposits adhering to the surface of a return belt of a belt conveyor used for transporting raw materials.

In the belt conveyor, normally the conveyed product is carried on a carrier belt (conveying side belt), discharged on the driving pulley side and becomes a return belt (returning side belt) and returns to the driven pulley, but the adhering to the return side belt surface. There was a problem that an object (attachment to the belt) dropped in the middle and accumulated under the return side belt. In addition, the adhering matter has a problem of causing the return roller and the snap pulley to wear or adhering to these rollers to meander the return side belt.

The transport material deposit that has fallen under the return belt is regularly collected, but it falls and accumulates over the entire length of the return belt, which is very labor intensive and expensive. . In order to scrape off the adhering matter on the return side belt, a belt cleaner such as a scraper type, a brush type or a cleaning type is installed. Of these, scraper belt cleaners are often used. The scraper belt cleaner has a structure in which a tip made of a wear-resistant material is attached to a free end of a scraper plate or a rectangular bar-shaped rubber elastic body, and the tip is pressed against the surface of the return side belt to scrape off the adhered matter.

In order to efficiently and stably exert the scraping function of the belt cleaner, a wear-resistant tip attached to the free end of the scraper is brought into precise contact with the surface of the return side belt. Therefore, the belt cleaner continuously receives various external forces from the belt. For example, horizontal force due to frictional force in the belt belt traveling direction, thrust force due to frictional force in the belt width direction due to belt meandering, vertical vibrational force due to belt unevenness, tension vibration due to changes in the conveying material, and strong attachment to the belt. It is the impact force by the kimono. In order for the belt cleaner to exhibit scraping performance while supporting various heavy loads, it is necessary to have a strength that can withstand heavy loads and a function that instantaneously avoids a large external force. For this reason, various types of belt cleaner structures have been proposed.

Japanese Patent Application Laid-Open No. 2008-127176 discloses a belt cleaner in which scraping members are arranged in a plurality of rows and zigzags in the width direction of the belt. In this method, since the scraping member and the scraping tip have the same width, a space is formed between adjacent scraping members, and deposits after scraping accumulate in this space, and a belt cleaner is attached. It ’s buried in kimono. There was a problem that the scraping function was impaired.

In the publicity of Japanese Patent Application Laid-Open No. 2001-139130, the belt conveying force is detected when the belt is in contact with the surface of the conveyed conveyor belt at an angle with respect to the belt conveying direction and in contact with the surface of the conveyed conveyor belt. A belt cleaner is shown that includes a cleaner body that scrapes off surface deposits from an oblique direction with respect to the belt conveying direction by using an oblique component force. In this method, the cleaner bodies overlap each other and come into contact with the belt body, but the cleaner body and the belt cannot be brought into precise contact. Further, since the cleaner body protrudes obliquely with respect to the belt traveling direction, there is a problem of damaging the belt. In addition, there is a problem that deposits after scraping accumulate between adjacent cleaner bodies, and the scraping performance is impaired.

Japanese Patent Laid-Open No. 7-215443 discloses a scraper type belt cleaner according to claim 1, wherein a plurality of stages of cleaner blades are arranged in a staggered manner in the belt traveling direction. In this method, the scraping performance is lost because the deposits after scraping are clogged between the scrapers.

Japanese Patent Application Laid-Open No. 2013-142027 discloses a belt cleaner in which small rectangular rubber elastic bodies are arranged in a line. In this method, when a gap is generated between adjacent chips, a streaky scraping residue is generated.

Japanese Laid-Open Patent Publication No. 2008-127176 JP 2001-139130 PR JP-A-7-215443 JP 2013-142027 PR

The present invention solves the following problems. (1) Since fine deposits get into the belt surface irregularities, they cannot be scraped off only by precisely contacting the chip. Even if the chip is pressed firmly against the belt, the belt will escape, so there is a limit to increasing the pressing force. (2) In a cleaner with a chip attached to a narrow rectangular rubber elastic body, if there is a gap between adjacent chips, a streak-like scraping residue will be generated, and the deposits could not be completely scraped off. . (3) It is difficult to abut the tip precisely on the belt that is deformed in an upward convex arc shape, and even if the pressing force of the tip is increased, there is a portion where the tip and the belt are not in contact with each other, There was scraping left behind. There was no specific method for bringing the tip into precise contact with the belt surface. (4) If the belt cleaner is too rigid with respect to the horizontal force or thrust force from the belt, there is a problem that the belt is damaged. The realization of a structure that maintains the scraping performance while flexibly avoiding the force received from the belt has been demanded.

The first solution is a composite belt cleaner comprising a front belt cleaner disposed upstream and a rear belt cleaner disposed downstream with respect to the traveling direction of the return belt, as shown in claim 1. In the composite belt cleaner, a plurality of rectangular elastic rubber bodies each having a chip attached to a free end are arranged in a groove of a frame disposed in the width direction of the return side belt, and the return side of the chip The width W1 in the width direction of the belt is narrower than the width W2 in the width direction of the return side belt of the rectangular rod-shaped rubber elastic body, and the chip has an interval P between the chips adjacent to each other. In order to satisfy the following equation P = W2-W1, the adjacent rectangular rod-shaped rubber elastic bodies are arranged close to each other, and the rear belt cleaner is the tip of the front belt cleaner. The center line of the space P between the center line and the rear belt cleaner is set so as to be substantially collinear with the traveling direction of the return belt, and the tip of the rear belt cleaner is the tip of the front belt cleaner. The composite belt cleaner is characterized in that the overlap H satisfies the following formula, H = (W1-P) / 2.

According to a second aspect of the present invention, as shown in claim 2, the quadrangle formed by frictional forces in the width direction of the return side belt at both ends in the width direction of the return side belt of the front belt cleaner and the rear belt cleaner. A fall prevention plate for preventing the rubber elastic body from falling is attached, the tip is attached to the fall prevention plate, and the fall prevention plate has friction in the direction of travel of the return side belt. An arc-shaped notch is provided so as to be flexibly bent with respect to force, and the width W3 in the width direction of the return side belt is wider than the width W2 of the rectangular bar-shaped rubber elastic body. The composite belt cleaner.

According to a third solving means, as shown in claim 3, a through hole is provided in the width direction of the return side belt of the rectangular bar-shaped rubber elastic body, and a flexible connecting rod passes through the through hole. The rectangular rod-shaped rubber elastic body is connected by the connecting rod, a flexible thin plate is laid on the bottom of the groove, and the thin plate is pushed up by a height adjusting bolt, whereby the rectangular rod-shaped rubber elastic body is The composite belt cleaner is characterized in that the fixed side end face of the body is pushed up, the thin plate and the connecting rod are bent in an arc shape, and the height of the rectangular rubber elastic body is adjusted.

According to a fourth solving means, as shown in claim 4, the tip is attached to a center portion of the width W2 of the free-side end of the rectangular bar-shaped rubber elastic body, and the return side belt of the tip is attached. A width W1 in the width direction is narrower than a width W2 in the width direction of the return side belt of the rectangular bar-shaped rubber elastic body, and the side surface of the chip in the width direction of the return side belt and the square bar shape The rubber elastic body is formed with a square rod-shaped rubber elastic body, on the side surfaces in the width direction of the return side belt, each of which satisfies the following formula P / 2 = (W2−W1) / 2. It is.

The effects of the first solving means are as follows. (1) Since the front belt cleaner and the rear belt cleaner are of a two-stage type, the deposits that could not be scraped off at the front stage can be completely scraped off at the rear stage. (2) Since a gap is provided between adjacent chips, the pressing force of the chip against the return side belt increases, so that the amount of bite of the chip into the return side belt increases and the scraping performance improves. (3) Since a gap is provided between adjacent chips, the adhered material after scraping with the chip is also discharged to both sides of the chip, so the time for the accumulated material to stay in the chip scraping portion is short. Increases scraping performance. (4) Since the quadrangular stick rubber elastic bodies are arranged close to each other, they support each other against the frictional force (thrust force) in the width direction of the return side belt. It does not fall down in the thrust direction.

The effects of the second solving means are as follows. (1) The fall prevention plates are provided at both ends in the width direction of the return side belt of the rectangular bar-shaped rubber elastic body, and the width W3 of the fall prevention plate is made wider than the width W2 of the square bar rubber elastic body. Therefore, it is possible to prevent movement of the rectangular rod-shaped rubber elastic body that tends to fall in the thrust direction. (2) Since the notch is provided in the fall-preventing plate, it can flex flexibly with respect to the frictional force in the traveling direction of the return side belt in the same manner as the rectangular bar-shaped rubber elastic body. Since the notch is formed in the width direction of the return side belt, it is easily bent in the traveling direction of the return side belt, but is not easily bent in the width direction of the return side belt.

The effect of the third solving means is that a through-hole is provided in the width direction of the return side belt of the rectangular bar-shaped rubber elastic body, and a flexible connecting rod is passed through the through-hole to form a rectangular bar-shaped rubber elastic Connecting the body, laying a flexible thin plate at the bottom of the groove, and pushing up the thin plate with the height adjustment bolt, the thin plate and the connecting rod bend in an arc shape at the same time, and a plurality of the above-mentioned square rod-shaped rubber elastic bodies Since the fixed side terminal end face is pushed up, the free side terminals of the plurality of rectangular bar-shaped rubber elastic bodies can be formed in a smooth arc shape with a small number of height adjusting bolts.

The effects of the fourth solving means are as follows. (1) Since the chip width W1 is narrower than the width W2 of the rectangular rod-shaped rubber elastic body, the adhered material scraped off by the chip can be released to both sides of the chip, so that the adhered material stays on the front surface of the chip. Since the length becomes shorter, the scraping performance is improved. (2) The structure in which the chip is attached to the rectangular bar-shaped rubber elastic body allows the width W2 of the rectangular bar-shaped rubber elastic body and the width W1 of the chip to be narrowed. Can escape to the side. (3) Since the adjacent rectangular rod-shaped rubber elastic bodies can be arranged in close proximity to each other in the frame of the gantry, they can fall against the frictional force (thrust force) in the width direction of the return side belt due to the meandering of the return side belt. Therefore, the chip spacing can be accurately maintained, and the scraping performance does not deteriorate.

The whole perspective view which carried out partial section of a belt cleaner. The schematic diagram of the positional relationship of a front | former stage and a back | latter stage belt cleaner. The flow schematic diagram of the deposit | attachment after scraping off a front | former stage and a back | latter stage belt cleaner. Schematic diagram of deposit discharge after scraping. The front view of a front | former stage and a back | latter stage belt cleaner. The positional relationship figure of a front | former stage and a back | latter stage belt cleaner. The chip | tip attachment figure to a rectangular stick-shaped rubber elastic body. Partial sectional view showing the mounting structure of the height adjustment bolt Side view and front view of fall prevention plate Top view of composite belt cleaner

Embodiments of the present invention will be described with reference to claims 1 to 4 and FIGS.

The first solving means is a composite belt cleaner comprising a front belt cleaner 11 arranged on the upstream side and a rear belt cleaner 12 arranged on the downstream side with respect to the traveling direction of the return side belt 50 as shown in claim 1. 10, the composite belt cleaner 10 includes a plurality of rectangular rod-shaped rubber elastic bodies 20 each having a tip 30 attached to a free end 20 a arranged in a groove 40 a of a gantry 40 disposed in the width direction of the return side belt 50. The width W1 in the width direction of the return side belt 50 of the chip 30 is narrower than the width W2 in the width direction of the return side belt 50 of the rectangular bar-shaped rubber elastic body 20. The chips 30 are arranged adjacent to each other so that the adjacent rectangular elastic rubber bodies 20 are adjacent so that the interval P between the chips 30 adjacent to each other satisfies the following formula P = W2-W1. The rear belt cleaner 12 is configured such that the center line C of the tip 30 of the front belt cleaner 12 and the center line C of the interval P between the rear belt cleaner 12 are in the traveling direction of the return side belt 50. The tip 30 of the rear belt cleaner 12 overlaps the tip 30 of the front belt cleaner 11, and the overlap H is expressed by the following equation: H = (W1 -P) / 2, the composite belt cleaner 10 is characterized.

As shown in FIGS. 1 to 3, the composite belt cleaner 10 has two front belt cleaners 11 and two rear belt cleaners 12 mounted in parallel in a direction perpendicular to the traveling direction of the return side belt.

The material of the chip 30 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.

The width W1 in the width direction of the return side belt 50 of the chip 30 is preferably 10 to 30 mm. If it is narrower than 10 mm, there is a risk that the return side belt 50 will bite too much and the return side belt 50 will be partially worn. Further, the contact state between the tip wider than 30 mm and the return side belt 50 is lowered, and there is a problem that the scraping performance is lowered.

The rectangular bar-shaped rubber elastic body 20 needs to have a pressing force for pressing the free end 20a against the return side belt 50, and needs to flexibly follow the delicate unevenness of the return side belt 50. 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.

As shown in FIGS. 2, 3, and 7, the transverse cross section of the rectangular bar-shaped rubber elastic body 20 is a rectangle having a long side parallel to the width direction of the return side belt 50. The width W2 of the rectangular rod-shaped rubber elastic body 20 is preferably 15 to 40 mm. When the width is less than 15 mm, the rigidity of the rectangular rod-shaped rubber elastic body 20 is reduced, and the deflection is increased due to the frictional force in the traveling direction of the return side belt 50 (hereinafter referred to as horizontal force), and the scraping performance is reduced. On the other hand, if the width is larger than 40 mm, the rigidity of the elastic body made of a rectangular bar-like rubber becomes too large, the deflection due to the horizontal force becomes small, the instantaneous vibration of the return side belt cannot be followed, and the scraping performance deteriorates. is there.

As shown in FIGS. 5, 6, and 7 (a), the tip 30 can be attached by protruding the tip end 30 a from the tip end portion 20 b of the rectangular bar-shaped rubber elastic body. In this case, the protruding amount L is 3 to 15 mm. When it is 3 mm or less, the life of the chip 30 is shortened. If it is 15 mm or more, there is a problem of breakage of the chip 30. Further, as shown in FIG. 7B, the tip 30 can be attached at the same height as the tip of the tip 30 and the tip 20b of the rectangular bar-shaped rubber elastic body. Since the rectangular bar-shaped rubber elastic body 20 is made of rubber and wears before the chip 30, the chip 30 can always be scraped off while protruding from the front end portion 20 b of the rectangular bar-shaped rubber elastic body 20. Further, since the pressing force between the tip 30 and the return side belt 50 is relieved, the return side belt 50 is not damaged. The chip 30 can be screwed to the free end 20a of the rectangular bar-shaped rubber elastic body 20 with a screw 33. Further, as shown in FIG. 7C, the chip 30 can be embedded by being embedded in the rectangular bar-shaped rubber elastic body 20.

As shown in FIGS. 5 and 9, it is preferable to provide the fall prevention plates 21 at both ends in the width direction of the return side belt 50 of the front belt cleaner 11 and the rear belt cleaner 12. By making the width W3 of the return side belt 50 in the width direction of the fall prevention plate 21 wider than the width W2 of the square bar rubber elastic body 20, the square bar rubber elastic body is caused by the thrust force caused by meandering of the return belt 50. 20 can be prevented from falling in the thrust direction. The fall prevention plate 21 is made equal to the rigidity of the rectangular bar-shaped rubber elastic body 20. This is because, when the rigidity of the fall prevention plate 21 is larger than the rigidity of the rectangular bar-shaped rubber elastic body 20, the fall prevention plate 21 strongly presses the return side belt 50 and wears the return side belt 50. Therefore, a notch 34a for adjusting the rigidity in the width direction of the return side belt 50 is provided. In addition, a plurality of tips 30 are preferably attached to the fall prevention plate 21 in order to prevent wear. The chip 30 is preferably compatible with the chip 30 attached to the rectangular bar-shaped rubber elastic body 20. Therefore, the width W3 of the fall prevention plate 21 is preferably an integer multiple of the width W1 of the chip 30. When N is an integer, N = W3 / W1 is satisfied.

As shown in FIG. 2, the center line C (meaning CC) of the width W1 center of the tip 31 of the front belt cleaner 11 is the contact between the side surfaces 20c of the rectangular rod-shaped rubber elastic body 20 of the rear belt cleaner 12. The front belt cleaner 11 and the rear belt cleaner 12 are attached so as to coincide with the center line C that passes through the center of the interval P of the rear belt cleaner 12. That is, since the center of the distance P between the center of the tip 31 of the front belt cleaner 11 and the rear belt cleaner 12 is arranged so that the center line C coincides, the tip 31 of the front belt cleaner 11 and the center of the rear belt cleaner 12 are aligned. The chip 32 can form an overlap H. The overlap H satisfies the following formula H = (W1) / 2−M = (W1) / 2−P / 2 = (W1) / 2− (W2−W1) / 2 = W1− (W2) / 2. . The overlap H can be increased by increasing the width W1 of the chip 30 or by decreasing the width W2 of the rectangular bar-shaped rubber elastic body 20. By making the overlap H wider, scraping remains less.

The width W1 of the chip 30 is narrower than the width W2 of the rectangular bar-shaped rubber elastic body 20, and the side surface 30b of the chip 30 facing the width direction of the return side belt 50 and the return of the rectangular bar-shaped rubber elastic body. An interval M is formed on the side surface 20c facing the width direction of the side belt. The interval M satisfies the following formula M = P / 2 = (W2−W1) / 2. Further, since the rectangular rod-shaped rubber elastic bodies 20 are arranged close to each other, the distance P between the chips 30 adjacent to each other satisfies the following formula P = W2-W1. The proximity indicates a contact state that does not affect each other with respect to the movement of the rectangular rod-shaped rubber elastic body 20 swinging with respect to the horizontal force of the return side belt 50.

FIG. 10 is a plan view showing the positional relationship between the front belt cleaner 11 and the rear belt cleaner 12. The rectangular rod-shaped rubber elastic bodies 20 are arranged in the groove 42 a of the gantry 40 so that the center of the interval P between the tip center of the front belt cleaner 11 and the rear belt cleaner 12 is located on the same center line C. Therefore, for example, when the composite belt cleaner 10 is formed by providing the front belt cleaner 11 and the rear belt cleaner 12 together, the dimension A1 between the center line C1 and the pipe end 48a of the support pipe 48 is the same as the dimension A2. Install in.

As shown in FIG. 3, most of the deposit 51 scraped by the front belt cleaner is dropped onto the front surface 30b of the chip 30, but partially passes through the side surface 30b of the chip and is held behind the chip 30. To go. Further, the deposit 51 that has passed through the interval P between the tips 30 is scraped off by the tips 30 of the rear belt cleaner 12. Since the tip 30 of the front belt cleaner 11 and the tip 30 of the rear belt cleaner 12 overlap each other, the deposits can be completely scraped off.

FIG. 4A schematically shows a scraping mechanism of a conventional belt cleaner. Since the scraping tip 30 is long and connected, the attached matter 51 after scraping falls to the front surface 30c of the tip. However, since the traveling speed of the return side belt 50 is fast, Part stays on the front surface 30 c of the chip 30. For this reason, the adhering matter 51 that has been scraped off is attached to the return side belt 50 again and escapes in the running direction of the return side belt 50, and drops and accumulates in a large amount on the downstream side of the return side belt 50. It was. FIG. 4B schematically shows the flow of the deposit 51 after scraping according to the present invention. Since the deposit 51 is discharged not only from the front surface 30c of the chip 30 but also from the chip side surface 30b, the deposit 51 does not stay on the front surface 30c of the chip, and the scraping performance is improved. Since the deposit 51 discharged from the side surface 30b of the chip 30 is not strongly pressed against the return side belt 50, it can be easily scraped off by the chip 32 of the rear belt cleaner 12. Further, since the adhering matter 51 in the portion of the interval P remaining without being scraped by the front belt cleaner 11 is small, it can be scraped almost completely by the rear belt cleaner 12.

FIG. 1 is a partial perspective view of belt cleaners 10, 11, 12 in which a chip 30 is attached to a rectangular rod-shaped rubber elastic body 20. The rectangular rod-shaped rubber elastic body 20 is inserted into a groove 40 a provided in the groove-type gantry 40. The groove 40 a includes a push side plate 41, a receiving side plate 42 and a bottom plate 43. A nut 46 is attached to the pushing side plate 41, and a pressing bolt 45 is rotatably attached thereto. When the pressing plate 44 is pressed by the pressing bolt 45, the rectangular bar-shaped rubber elastic body 20 is pressed against the receiving side plate 42 and fixed. doing. A flange 47 is attached to both sides of the gantry 40, and a support pipe 48 is attached to the flange 47.

The support pipe 48 is sandwiched and fixed by a pipe clamp 60 including a U-bolt 62 welded to the inside of the groove-type base 61 and a pipe presser plate 64 fitted to the U-bolt 62. A height adjustment bolt 71 for adjusting the height of the pipe clamp 60 is attached to the bottom plate 70a of the pipe clamp table 70, and the pipe clamp 60 is The fastening bolt 65 attached to the side surface 61a of the groove base 61 is fixed by passing through a long hole 70c provided on one side surface 70b of the pipe clamp table 70. The pipe clamp table 70 is A frame receiver in which a fixing bolt 73 provided on the other side surface 70d of the pipe clamp table 70 is attached to the conveyor frame 90. And allowed to penetrate the section 80, the pipe clamp table 70 and fixed by tightening the frame receiving base 80, is attached to the conveyor frame 90.

As shown in FIG. 6, the effect obtained by combining the front belt cleaner 11 and the rear belt cleaner 12 to form the composite cleaner 10 is as follows. (1) Since the front belt cleaner 11 and the rear belt cleaner 12 are in a two-stage system, the deposit 51 that could not be scraped off by the front cleaner 11 can be completely scraped off by the rear cleaner 12. When a gap is formed between adjacent chips 30 as in the prior art, scraping is left, but the tips 30 of the front belt cleaner 11 and the rear belt cleaner 12 are attached so as to overlap each other. It became possible to scrape off almost completely. (2) Since the interval P is provided between the adjacent chips 30, the pressing force of the chip 30 against the return side belt 50 increases, so the amount of biting of the chip 30 into the return side belt 50 increases and the scraping performance. Is up. Conventionally, the tip 30 is uniformly abutted over the entire width of the return side belt 51, so that the tip 30 cannot be bite into the surface of the return side belt 50. In the present invention, since the interval P is provided between the adjacent chips 30, the chip 30 can be incorporated. (3) Since the interval P is provided between the adjacent chips 30, the deposit 51 after scraping with the chip 30 is also discharged to both sides of the chip 30, so that the deposit 51 is scraped off the chip 30. The residence time in the part is shortened and the scraping performance is improved. In the conventional cleaner, since the deposit 51 after scraping is deposited on the front surface 30c of the chip 30 and dropped, the deposit 51 stays on the front surface 30c of the chip 30 and a part of the deposit 51 is formed. The tip 30 slipped through and was reattached to the return side belt 50. (4) Since the quadrangular bar-shaped rubber elastic bodies 20 are arranged close to each other, the quadrangular bar-shaped rubber elastic bodies 20 are in contact with each other against the frictional force (thrust force) in the width direction of the return side belt 50. Since they support each other, the rectangular rod-shaped rubber elastic body 20 does not fall down in the thrust direction.

According to a second solving means, as shown in claim 2, the frictional force in the width direction of the return side belt 50 is provided at both ends of the front side belt cleaner 11 and the rear stage belt cleaner 12 in the width direction of the return side belt 50. Is attached to the fall prevention plate 21 for preventing the fall of the rectangular bar-shaped rubber elastic body 20, and the tip 30 is attached to the fall prevention plate 21. An arc-shaped notch 21a is provided so as to be flexibly bent with respect to the frictional force in the traveling direction of the return side belt 50, and the width W3 in the width direction of the return side belt 50 is a rectangular bar-shaped rubber elastic. The composite belt cleaner 10 is wider than the width W2 of the body 20.

As shown in FIGS. 5 and 9, the fall prevention plates 21 are provided at both ends in the width direction of the return belt 50 of the front belt cleaner 11 and the rear belt cleaner 12. By making the width W3 of the return side belt 50 in the width direction of the fall prevention plate 21 wider than the width W2 of the square bar rubber elastic body 20, the square bar rubber elastic body is caused by the thrust force caused by meandering of the return belt 50. 20 can be prevented from falling in the thrust direction. The fall prevention plate 21 is provided with an arc-shaped notch 21 a in the width direction of the return side belt 50. By making the notch 21a into an arc shape, breakage from the notch due to stress concentration can be prevented. A plurality of the notches 21a may be provided depending on the size and shape of the notches 21a. The curvature of the notch 21a is preferably 5 to 10R. If it is 5R or less, the stress concentration increases and there is a risk of breakage from the notch. On the other hand, if it is larger than 10R, the deflection becomes too large and the scraping performance is lowered. The number of the notches 21a and the size of the arc curvature are adjusted as appropriate so that the rigidity of the fall prevention plate is equal to the rigidity of the rectangular bar-shaped rubber elastic body 20. This is because the pressing force of the fall prevention plate and the rectangular bar-shaped rubber elastic body are made equal, and the belt is uniformly brought into contact with the belt. A plurality of tips 30 are attached to the fall prevention plate 21 to prevent wear.

According to a third solving means, as shown in claim 3, a through hole 20e is provided in the width direction of the return side belt 50 of the rectangular bar-shaped rubber elastic body 20, and the through hole 20e is flexible. The connecting rod 100 is penetrated, the rectangular rod-shaped rubber elastic body 20 is connected by the connecting rod 100, a flexible thin plate 110 is laid on the groove bottom 43, and the thin plate 110 is connected with a height adjusting bolt 120. By pushing up, the fixed-side end face 20f of the square bar-shaped rubber elastic body 20 is pushed up, the thin plate 110 and the connecting bar 100 are bent in an arc shape, and the height of the square bar-shaped rubber elastic body 20 is adjusted. The composite belt cleaner 10 is characterized by the above.

As the material of the thin plate 110, a resin thin plate such as urethane, fluorine, rubber, or plastic, a metal thin plate such as SUS, copper, titanium, or carbon steel, or carbon fiber can be used. It should be flexible enough to bend flexibly when pushed up by the height adjustment bolt 120 and has a strength capable of pushing up the plurality of rectangular bar-shaped rubber elastic bodies 20 at the same time.

The thickness of the thin plate 110 is preferably 3 to 6 mm in the case of resin. If it is 3 mm or less, the plurality of rectangular rod-shaped rubber elastic bodies 20 cannot be pushed up. On the other hand, when the thickness is 6 mm or more, a proper arc cannot be formed and a linear shape is obtained. In the case of the metal thin plate 110, 1 to 4 mm is preferable. If it is 1 mm or less, it is not possible to push up a plurality of rectangular rod-shaped rubber elastic bodies 20. If it is 1 mm or more, an appropriate circular arc cannot be formed and a linear shape is obtained.

As shown in FIG. 8, when the flexible thin plate 110 is pushed up by the height adjusting bolt 120, the thin plate 110 automatically bends into a convex arc shape. Since the fixed side end face 20f of the elastic body 20 also rises, the height of the rectangular rod-shaped rubber elastic body 20 can be adjusted with a small number of height adjustment bolts 120. Further, since the flexible and strong thin plate 110 is curved in a smooth convex arc shape, the shape of the free side end face 20d of the square-shaped rubber elastic bodies 20 arranged in a row is changed to the shape of the return side belt 50. It can be formed in a stepped smooth convex arc shape. The height adjusting bolt 120 is rotatably attached to the fixing nut 121.

According to a fourth solving means, as shown in claim 4, the tip 30 is attached to a central portion of the width W2 of the free-side end 20a of the rectangular rod-shaped rubber elastic body 20, and the tip 30 The width W1 in the width direction of the return side belt 50 is narrower than the width W2 of the rectangular rod-shaped rubber elastic body 20, and both of the tips 30 are opposed to the width direction of the return side belt 50 in the chip 30. There is an interval M between the side surface 30b and the side surface 20c of the rectangular bar-shaped rubber elastic body 20 facing the width direction of the return belt, and the interval M is expressed by the following equation: M = P / 2 = (W2−W1) / 2. This is a rectangular rod-shaped rubber elastic body 20 that satisfies the above.

As shown in FIGS. 5, 6, and 7 (a), the tip 30 can be attached by projecting the tip end 30 a from the tip end portion 20 b of the rectangular rod-shaped rubber elastic body 20. In this case, the protruding amount L is 3 to 15 mm. When it is 3 mm or less, the life of the chip 30 is shortened. If it is 15 mm or more, there is a problem of breakage of the chip 30. Further, as shown in FIG. 7B, the tip 30a of the chip 30 and the tip 20b of the quadrangular stick rubber elastic body 20 can be attached at the same height. Since the rectangular bar-shaped rubber elastic body 20 is made of rubber and wears before the chip 30, the chip 30 can always be scraped off while protruding from the front end portion 20 b of the rectangular bar-shaped rubber elastic body 20. Further, since the pressing force between the tip 30 and the return side belt 50 is relieved, the return side belt 50 is not damaged. The chip 30 can be screwed to the free end 20a of the rectangular bar-shaped rubber elastic body 20 with a screw 33. Further, as shown in FIG. 7C, the chip 30 can be embedded by being embedded in the rectangular bar-shaped rubber elastic body 20.

Since the width W1 of the chip 30 is narrower than the width W2 of the rectangular rubber elastic body 20, the adhering matter 51 scraped off by the chip 30 can be released to both sides of the chip 30, so that the adhering matter is the front surface 30c of the chip 30. Since the time for staying in is shortened, the scraping performance is improved. Further, the structure in which the chip 30 is attached to the rectangular rubber elastic body 20 can reduce the width W2 of the rectangular rubber elastic body 20 and the width W1 of the chip, so that the adhered matter 51 after scraping can be further smoothed. It can escape to the both side surfaces 30b of the chip 30. Further, since the adjacent rectangular rod-shaped rubber elastic bodies 20 can be arranged in the groove 40a of the gantry 40 in close proximity to each other, it does not fall down against the thrust force of the return side belt 50 due to the meandering of the return side belt 50. Since the interval P between the chips 30 can be accurately maintained, the scraping performance does not deteriorate.

10: Composite belt cleaner 11: Front belt cleaner 12: Rear belt cleaner 20: Square bar rubber elastic body 20a: Free end 20b (of the square bar rubber elastic body): End part (of the square bar rubber elastic body) 20c: Side surface 20d (of the rectangular bar-shaped rubber elastic body) Contact portion 20e (on the side surface of the rectangular bar-shaped rubber elastic body) Through hole 20f (of the rectangular bar-shaped rubber elastic body): (of the rectangular bar-shaped rubber elastic body) ) Fixed terminal end face 21: Square rod rubber elastic body 22 (of the front belt cleaner): Square rod rubber elastic body 23 (of the rear belt cleaner) 23: Fall prevention plate 23a: Notch 30: Chip 30a: (chip ) Tip portion 30b: Side surface 30c (of tip): Front surface 31 (of tip): Tip 32 (of front belt cleaner): Tip 33 (of rear belt cleaner): G 40: frame 40a: groove 41: push side plate 42: receiving side plate 43: bottom plate 44: pressing plate 45: pressing bolt 46: nut 47: flange 48: support pipe 50: return side belt 51: with return side belt Kimono 60: Pipe clamp 61: Channel base 61a: Side surface 61b: Bottom plate 62: U bolt 62b: Arc part 62c: Body 63: Nut 64: Presser plate 65: Tightening bolt 66: Nut 67: Welding 70: Pipe clamp stand 70a: bottom plate 70b: one side surface 70c: long hole 70d: other side surface 70e: through hole 71: height adjustment bolt 72: nut 73: fixing bolt 74: nut 80: gantry receiving base 80a: through hole 90: conveyor frame 100: Connecting rod 110: Thin plate 120: Height adjusting bolt 121: Fixing nut W1: Width W2 in the width direction of the return side belt of the tip Width P in the width direction of the return side belt of the rectangular bar-shaped rubber elastic body: the interval M (between adjacent chips) M: the distance H (between the chip side surface and the side surface of the rectangular bar rubber elastic body): (the front belt cleaner chip and the rear stage) Overlap L of the belt cleaner tip: protrusion amount C of the tip C: center line C1 (in the space between the front belt cleaner tip and the rear belt cleaner) A1: center line A1 of the front belt cleaner and the rear belt cleaner A1: front belt cleaner Dimension A2 between the center of the belt and the support pipe end: Dimension between the center of the rear belt cleaner and the end of the support pipe

Claims (4)

In the composite belt cleaner comprising the upstream belt cleaner disposed upstream and the downstream belt cleaner disposed downstream with respect to the traveling direction of the return belt, the composite belt cleaner includes a plurality of tips each having a tip attached to a free terminal. Quadrangular bar-shaped rubber elastic bodies are arranged in a groove on a gantry arranged in the width direction of the return side belt, and the width W1 of the tip in the width direction of the return side belt is equal to the elastic width of the square bar rubber. The width is narrower than the width W2 in the width direction of the return belt of the body, and the chips are adjacent so that the interval P between the adjacent chips satisfies the following formula P = W2-W1 The rectangular rod-shaped rubber elastic bodies are arranged close to each other, and the rear belt cleaner has an interval P between the center line of the tip of the front belt cleaner and the rear belt cleaner. The core wire is installed so as to be substantially collinear with the traveling direction of the return belt, and the tip of the rear belt cleaner overlaps the tip of the front belt cleaner, A lap H satisfies the following formula, H = (W1-P) / 2, and a composite belt cleaner. An anti-falling plate for preventing the quadrangular bar-shaped rubber elastic body from falling down due to frictional force in the width direction of the return side belt at both ends in the width direction of the return side belt of the front belt cleaner and the rear belt cleaner The tip is attached to the fall-preventing plate, and the fall-preventing plate has an arc shape so as to flexibly bend against the frictional force in the traveling direction of the return side belt. 2. The composite belt cleaner according to claim 1, wherein a notch is provided, and a width W3 in the width direction of the return side belt is wider than a width W2 of the rectangular bar-shaped rubber elastic body. 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 by the connecting rod. A flexible thin plate is laid on the bottom of the groove, and the thin plate is pushed up by a height adjusting bolt, whereby the fixed side end face of the rectangular bar-shaped rubber elastic body is pushed up, and the thin plate and the connection 3. The composite belt cleaner according to claim 1, wherein the bar is bent in an arc shape, and the height of the rectangular bar-shaped rubber elastic body is adjusted. The tip is attached to the central portion of the width W2 in the width direction of the return side belt of the rectangular bar-shaped rubber elastic body, and the width W1 of the tip in the width direction of the return side belt is made of the square bar rubber. Both side surfaces of the chip that are narrower than the width W2 of the chip are opposed to the width direction of the return side belt of the chip and the side surfaces of the rectangular bar-shaped rubber elastic body that are opposed to the width direction of the return side belt. 4. The quadrangle according to claim 1, wherein the space M satisfies the following formula M = P / 2 = (W2−W1) / 2. Stick-shaped rubber elastic body.