JP2005059996A - Cleaner device for conveyer belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a scraper easy to closely adhere to a belt surface, even if the scraper is unevenly worn. <P>SOLUTION: This device is provided with a holding shaft 5 disposed in a belt width direction of a belt conveyor 1 and the planar scraper 12 held along the holding shaft 5 and having flexibility. The device removes deposited substances on the belt surface by bringing the scraper 12 into pressure contact with the belt surface. Since plate thickness of the scraper 12 is made thinner from the center part toward both end parts, deformation performance at both end parts of the scraper 12 is enhanced as compared with the center part. As a result, the pressure contact surfaces at both the projected end parts are deformed along the belt surface to be in even pressure contact with the center part when a pressure contact surface of the scraper center part is greatly worn out and the pressure contact surfaces at both end parts become projecting states to the belt surface side as compared with the worn out pressure contact surface at the center part, and thereby the scraper 12 is capable of closely adhering to the belt surface, even if the pressure contact surfaces are in unevenly worn out states. If each of the scrapers 12 is fixed as one divided in the belt width direction to the holding shaft 5, only a highly worn out part of the scraper 12 can be replaced and the scraper 12 becomes economical. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cleaner device for removing deposits on a conveyor belt.

  In a thermal power plant, a steel mill, a chemical plant, a sewage treatment plant, a garbage disposal plant, and the like, a belt conveyor that conveys various raw materials, fuels, treated materials, wastes, and the like is used. In the belt conveyor 1, a belt B having a predetermined width is wound endlessly between a driving pulley 2 and a driven pulley (not shown), and the driving pulley 2 is rotated to rotate the belt B. This will be described with reference to FIG. 2, which is an embodiment of the present invention. A conveyed product is placed on one end of the carrier B 6 positioned above the belt B that circulates. 1 is conveyed from one end to the other end. At the other end, the belt B is reversed to the return portion 8 positioned below as indicated by an arrow a in FIG. 2, and at the reversing portion 7, the conveyed product falls from the belt surface and is removed. The

  Since the belt B is usually made of rubber, a conveyed product often adheres to the belt surface. Since such deposits proceed to the return unit 8 without being removed by the reversing unit 7, at the return unit 8, the deposits fall off the belt surface due to vibration or the like and fall to the floor surface or the like. There is. For this reason, it is not preferable that deposits remain on the belt surface in terms of conveyance efficiency and safety of the conveyor operation.

  Therefore, as shown in FIG. 10, a cleaner device having a plate-shaped scraper is pressed against the belt surface of the reversing unit 7 and the return unit 8 to remove the adhering matter.

  As shown in FIG. 10, the cleaner device includes a reversing portion cleaner 10 that presses toward the belt surface from the side in the belt reversing portion 7, and the belt B after reversing to the return portion 8, and at that position from below. It comprises an intermediate cleaner 20 that presses upward toward the belt surface.

  Each cleaner device has a scraper made of a plate whose thickness is uniform in the belt width direction, and the scraper is erected on a holding shaft 5 arranged in the belt width direction. By rotating the holding shaft 5 of the reversing part cleaner 10 around the axis as indicated by the arrow c in FIG. 10, the upper end of the scraper is pressed toward the belt surface. 5 is raised toward the belt surface as indicated by an arrow h, so that the upper end of the scraper is pressed toward the belt surface.

  Further, when the scraper receives a reaction force from the belt surface, the impact is absorbed by the elastic force of the spring 4 interposed between the holding shaft 5 and the frame F, and the pressure contact force of each scraper. Is maintained.

  However, when a rubber scraper is used in the cleaner device, the scraper is worn by rubbing against the belt surface. Since the conveyed object is usually loaded in the central part with a large amount at the both ends with respect to the belt width, the deposits tend to increase in the central part. For this reason, as shown in FIG. 10, the scraper that is in pressure contact with the belt surface is greatly scraped only at the center pressure contact surface, and the pressure contact surfaces at both ends are closer to the belt surface side than the pressure contact surface at the center portion. It may become a state of uneven wear protruding. This is because the deposit increases the friction coefficient between the belt surface and the scraper. Since the central portion of the scraper that has been unevenly worn does not adhere to the belt, deposits on the belt surface cannot be efficiently removed.

  As a means for reducing the wear of the scraper, a hard material such as cemented carbide or ceramic can be used for the scraper. However, if the scraper is hard, the wear of the belt is accelerated, so that the life of the conveyor belt B can be extended. It may not be preferable from the viewpoint.

  Therefore, an object of the present invention is to allow the scraper to be in close contact with the belt surface even when the scraper is worn away.

  In order to solve the above-mentioned problem, the present invention attaches a flexible plate-shaped scraper in the belt width direction to a holding shaft disposed in the belt width direction of a belt conveyor, and attaches the leading edge of the scraper to the holding shaft. In the cleaner device that removes deposits on the belt surface by being pressed against the belt surface, the scraper plate thickness is gradually reduced from the center in the belt width direction to both ends. .

  As the scraper and a mechanism for press-contacting the scraper, the holding shaft is rotatably supported by a bearing of a conveyor frame, and the scraper rotates around the axis of the holding shaft and the side surface of the scraper tip is in the belt width direction. It shall be in close contact over the entire length and pressed against the belt surface.

  In this way, since the scraper gradually becomes thinner as it approaches both ends, the deformability of the scraper both ends is higher than the center, allowing large deformation of the end and allowing the scraper to follow the belt surface. Will be better.

  For this reason, when the pressure contact surface at the center portion of the scraper is greatly worn away and the pressure contact surfaces at both ends protrude toward the belt surface side with respect to the pressure contact surface at the center portion, the scraper wears down. Since the center part is pressed against the belt surface, the pressed contact surfaces at both protruding ends are deformed along the belt surface and come into uniform pressure contact with the center part. Even in such a state, it can be uniformly adhered to the belt surface.

  As another mechanism for bringing the scraper into pressure contact with the scraper, the holding shaft is fixed to a bearing supported by a conveyor frame so as to be movable up and down, and the scraper has an upper surface at the tip of the scraper as the holding shaft rises. It is assumed that it is in close contact over the entire length in the belt width direction and pressed against the belt surface.

  In this way, as in the configuration in which the holding shaft is rotationally supported, a large deformation of the end portion is allowed and the followability to the belt surface of the scraper is improved, so that the pressure contact surface of the scraper central portion is greatly worn away. When the pressure contact surfaces at both ends protrude toward the belt surface side than the pressure contact surfaces at which the central portion is worn away, the scraped center portion of the scraper presses against the belt surface and both ends protruded The pressure contact surface is curved and deformed so as to bend in the operation direction of the belt surface, so that it comes into uniform pressure contact with the central portion. For this reason, the scraper can be in close contact with the belt surface even in a state where the pressure contact surface is partially worn.

  Further, since the upper surface of the scraper is pressed against the belt surface, even when the conveyor is operated in the reverse direction, the scraper easily follows the belt surface and deforms.

  Furthermore, if the scraper having the above-described configuration is provided so as to be in contact with the belt surface with a width within a range in which deposits are generated on the belt surface with respect to the belt width of the belt conveyor, the belt width of the scraper is reduced. The direction end is also in pressure contact with the deposit generation range. At this time, not only the central part of the scraper but also the part where the plate thickness of the end part gradually decreases wears appropriately, and the end part follows the belt surface according to the degree of wear of the central part. It becomes easier to deform. For this reason, a scraper becomes easy to adhere | attach more uniformly over the belt width direction full length, and a cleaner effect is high.

  As described above, the present invention makes it easy to deform both end portions of the scraper, so that even if the central portion of the scraper is partially worn, it can be in close contact with the belt surface.

  An embodiment is shown in FIGS. 1 to 7, and a conveyor belt cleaner device according to this embodiment includes a driving pulley 2 and a driven pulley (not shown), and an intermediate pulley 3 positioned therebetween, as shown in FIG. A belt B having a predetermined width is wound endlessly between the belt conveyor 1 and the drive pulley 2 is rotated to rotate the belt B so that the belt B rotates and is used in contact with the belt surface of the belt conveyor 1.

  The conveyor belt B has a carrier portion 6 positioned on the upper side on which a conveyed product is placed and a return portion 8 positioned on the lower side, and the conveyed product is placed on one end on the carrier portion 6. As the belt moves, the conveyed product is conveyed from one end of the conveyor 1 to the other end, and the belt B moves to the lower return unit 8 as shown by the arrow a in the reversing unit 7 along the curved surface of the driving pulley 2 at the other end. And the conveyed product is pulled down as indicated by an arrow b at that position.

  As shown in FIG. 2, the cleaner device pressed against the belt surface of the conveyor belt B has a reversing portion cleaner 11 that presses the reversing portion 7 toward the belt surface from the outside of the conveyor 1, and a belt. After reversing to the return part 8, the intermediate part cleaner 21 is pressed between the intermediate pulley 3 provided in the return part 8 and the drive pulley 2 from below and upward toward the belt surface. Each of the cleaner apparatuses 11 and 21 includes a holding shaft 5 disposed in the belt width direction of the belt conveyor 1 and a plate scraper made of urethane rubber that is held along the holding shaft 5 and has flexibility. .

  As shown in FIG. 1, the reversing part cleaner 11 has a holding shaft 5 disposed in the belt width direction on the outer side of the reversing part 7 and a scraper 12 erected on the holding shaft 5. ing. As shown in FIG. 3C, the holding shaft 5 is rotatably supported by a bearing 15 fixed to the frame F, and extends between the support plate 14 extending from the holding shaft 5 to the side and the frame F. The bolt 13 is connected, and the spring 13 is interposed between the support plate 14 and the frame F, and a nut 13 a is attached to the tip of the bolt 13 to adjust the amount of movement of the support plate 14.

  By adjusting the tightening of the bolt 13, the spring 4 moves up and down together with the bolt 13 and adjusts the vertical position of the support plate 14. By this adjustment, when the holding shaft 5 is rotated as shown by an arrow c, the surface side of the upper end side surface of the scraper 12, that is, the side surface facing the conveyor 1, faces the belt surface of the reversing unit 7 in the figure. It is pressed to the side as indicated by the arrow d and presses against the belt surface. By fixing the holding shaft 5 at this position, the scraper 12 removes the deposits on the belt surface so as to scrape off at the reversing portion 7.

  When the scraper 12 receives a reaction force from the belt surface in the direction opposite to the arrow d, the support plate 14 moves away from the frame F due to the elastic force of the interposed spring 4. Repulsively, the holding shaft 5 tries to rotate around the axis as indicated by the arrow c in the figure, and maintains the pressure contact with the belt surface.

  The scraper 12 has a scraper 12a having a uniform thickness in the belt width direction at the center in the belt width direction, and the back surface side of the pressure contact surface at both ends in the belt width direction, that is, the conveyor 1. The scraper 12b is formed so that the thickness of the scraper upper end gradually decreases from the center to both ends by making the side opposite the side facing the taper into a taper shape. 12c. Further, as shown in FIG. 1, the scrapers 12a, 12b, and 12c are thinner as they approach the upper end. That is, the scraper 12 has a thickness that gradually decreases from the center toward both ends, and a thickness that gradually decreases from the bottom toward the upper end.

  As shown in FIGS. 3A and 3B, these scrapers 12a, 12b, and 12c are each divided as a separate member in the belt width direction. Further, the scraper 12a has three in the belt width direction. They are divided and fixed to the holding shaft 5 respectively. As shown in FIG. 5, the holding shaft 5 has a fixing piece 5a protruding from the shaft, and a bolt 18 is inserted into a hole 5b provided in the front and back direction of the fixing piece 5a. Since the scraper 12 is fixed to the holding shaft 5 by stopping, the replacement is easy.

  When the cleaner 1 is used while the conveyor 1 is in operation, as shown in FIG. 4 (a), the central portion of the scraper 12 is relatively greatly worn as time passes, and the pressure contact surface 17a is worn away. Also, the pressure contact surfaces 17b, 17c at both ends protrude from the belt surface side. In this state, when the scraper 12 is pressed against the belt surface, as shown in FIG. 4B, the protruding pressure contact surfaces 17b and 17c at both ends are deformed along the belt surface, and the central pressure contact surface. 17a is further pushed toward the belt surface as indicated by arrow f, and conversely, the pressure contact surfaces 17b and 17c at both ends are pushed toward the opposite side of the belt surface as indicated by arrow g, so that the center portion and both end portions are pressed. And come to press against the belt surface uniformly.

  As described above, since the deformability of both end portions of the scraper 12 is higher than that of the central portion, the scraper 12 can be uniformly adhered to the belt surface even in a state where the pressure contact surface is partially worn.

  Further, since the scraper 12 is divided in the belt width direction as described above, it is economical that only a portion where the wear is severe can be replaced.

  As shown in FIG. 2, the position of the scraper is preferably located on the side of the reversing portion 7 in the horizontal direction or slightly below, but the installation location is not limited, and the angle at which the scraper is installed is relative to the belt surface. By adjusting to a predetermined angle, it is possible to use other than the reversing unit 7 such as the return unit 8.

  As shown in FIG. 3, the scraper 12 has a pressure contact angle with respect to the belt surface by inclining the side surface on the pressure contact surface side toward the conveyor toward the upper end. This pressure contact angle can be freely set according to the attachment position to the cleaner device 11 (the angle of the scraper pressure contact position with respect to the belt surface) and the required pressure contact strength to the belt surface.

  On the other hand, as shown in FIG. 1, the intermediate cleaner 21 includes a holding shaft 5 disposed in the belt width direction and a scraper 22 erected on the holding shaft 5 below the return portion 8. . As shown in FIG. 6, the holding shaft 5 is fixed to a bearing 25 supported by a frame F so as to be movable up and down, and the bearing 25 is fixed with a spring 4 interposed between the bearing 25 and the frame F. .

  When the bolts 23 are rotated and screwed in the direction of the arrow j to raise the bearing 25 and the holding shaft 5 with respect to the frame F as shown by the arrow h, the upper surface of the scraper 22 is moved to the return portion 8. Toward the belt surface and pressed upward as indicated by an arrow i in FIG. By fixing the holding shaft 5 at this position, the scraper 22 removes the deposits that could not be removed by the reversing unit 7 so as to be scraped off by the return unit 8.

  When the scraper 22 receives a reaction force from the belt surface in the direction opposite to the arrow i, the support plate 24 rises with respect to the frame F by the elastic force of the interposed spring 4. The holding shaft 5 tends to rise as shown by an arrow h in the figure, and maintains the pressure contact with the belt surface. At this time, since the support plate 24 is provided with a stopper 24a shown in FIG. 6C, the stopper 24a abuts against the frame F to prevent the holding shaft 5 from repelling upward more than necessary. It is out.

  The scraper 22 has a scraper 22a having a uniform thickness in the belt width direction at the center in the belt width direction, and both front and back sides, that is, the conveyor belt B, at both ends in the belt width direction. The scrapers 22b and 22c have a scraper 22b, 22c in which the thickness at the upper end of the scraper decreases from the center to both ends by making the both sides intersecting in the traveling direction into a taper shape in the thickness direction. Yes. As shown in FIG. 6, the taper surface 26 has a plate thickness that becomes thinner toward the upper surface.

  As shown in FIG. 6, the scrapers 22a, 22b, and 22c are each divided as a separate member in the belt width direction. Further, the scraper 22a is divided into three pieces in the belt width direction, and each holding shaft 5 is divided. It is fixed to. The fixing method and the effect of the division are the same as those of the scraper 12 shown in FIG.

  When the conveyor 1 is operated and the cleaner device 21 is used, as shown in FIG. 7A, the central portion of the scraper 22 is relatively greatly worn with time, and the pressure contact surface 27a in which the central portion is worn down is obtained. As a result, the pressure contact surfaces 27b and 27c at both ends protrude to the belt surface side. In this state, when the scraper 22 is pressed against the belt surface, as shown in FIG. 7 (c), the protruding pressure contact surfaces 27b and 27c along the belt surface indicate the direction of operation of the belt. As shown in FIG. 7B, the central portion and both end portions are uniformly pressed against the belt surface.

  As described above, since the deformability of both end portions of the scraper 22 is higher than that of the central portion, the scraper 22 can be in close contact with the belt surface even in a state where the pressure contact surface is partially worn.

  In addition, since both the front and rear surfaces of the scraper 22 are tapered at both ends, the scraper 22 has a tapered surface symmetrically on both sides of the belt movement direction with respect to the contact portion of the upper surface of the scraper with the belt surface. It will have. For this reason, even when the conveyor is operated in the reverse direction, the scraper is deformed to the same extent, so that the belt surface easily follows and adheres regardless of the operation direction.

  As shown in FIG. 6C, the position of the scraper 22 is preferably below the return portion 8, but the installation location is not limited. The angle at which the scraper is installed is a predetermined angle with respect to the belt surface. It is possible to use other than the return unit 8 by adjusting to the above. The installation angle of the scraper with respect to the belt surface can be freely set at any installation location.

  In the above embodiment, the two cleaner devices of the reversing portion cleaner 11 and the intermediate portion cleaner 21 are provided side by side. However, the present invention is not limited to this embodiment, and one cleaner device is provided depending on the quality and quantity of the deposit. An omitted configuration can also be adopted. Moreover, the material of a scraper is not limited to urethane rubber, What is necessary is just a raw material which has flexibility.

  In any of these scrapers 12, 22, a configuration in which the scraper itself is not divided in the belt width direction can be adopted, and in the case of division, the division location and the number of division are arbitrary. Further, the scraper 22 used in the intermediate cleaner 21 may have a tapered surface 26 on one of the front and back side surfaces. In any scraper 12, 22, the taper surface 16, 26 in the belt width direction. The mounting length of is free.

  Further, in this embodiment, the spring 4 is used to maintain the pressure contact force at a certain level in the scraper. However, any known elastic material having an elastic force can be used instead of the spring 4. The pressure welding method is not limited to this embodiment. Further, the elastic material may be omitted when the variation of the pressure contact force is allowed to some extent.

  As another embodiment, for example, as shown in FIG. 8A, the scraper 12 has a back surface side of the pressure contact surface, that is, a side surface opposite to the side facing the conveyor 1 in the plate thickness direction. A configuration is also conceivable in which the thickness of the upper end of the scraper 12 is gradually reduced from the central portion to both end portions by using an arc shape. Further, as shown in FIG. 8B, a configuration is also possible in which the length of the taper surface in the belt width direction is increased so that the cross section of the upper end of the scraper becomes a triangle.

  On the other hand, as another embodiment relating to the scraper 22, as shown in FIG. 9 (a), the front and back both sides, that is, both sides intersecting with the moving direction of the conveyor belt B are formed in an arc shape in the plate thickness direction. Therefore, a configuration in which the thickness of the upper end of the scraper 22 is reduced as it goes from the central portion to both end portions is also conceivable. Further, as shown in FIG. 9B, one of the side surfaces intersecting the traveling direction of the conveyor belt B is tapered in the thickness direction, and the thickness of the upper end of the scraper 22 is changed from the center portion to both ends. A configuration is also conceivable in which the thickness is reduced toward the part.

  In each aspect of the scrapers 12 and 22 having the above-described configuration, the width of the scrapers 12 and 22, that is, the scraper length in the belt width direction, is the belt width (the belt B is in a flat state at the reversing portion). The width is preferably set within a range of 2/3 to 4/5 length. In a general belt conveyor, various materials are loaded and transported within the range of the belt width, and therefore, a large amount of deposits are generated in this portion, and the deposits are generated in the outer portion. It hardly occurs.

  For this reason, if the scraper length is set so that the scraper is in pressure contact with the belt surface within the range where the deposits are generated, not only the central portion of the scraper, but also the portion where the thickness of the end portion becomes gradually thinner Is moderately worn, and the end portion follows the belt surface in accordance with the degree of wear of the central portion, and is further easily deformed. For this reason, the scraper is preferable because it becomes easier to adhere more uniformly over the entire length in the belt width direction and the cleaner effect is further enhanced.

Perspective view of one embodiment Cut side view of the same embodiment The reverse part cleaner of the embodiment is shown, (a) is a plan view, (b) is a front view, and (c) is a side view. Fig. 3 shows the worn state of the scraper in Fig. 3, (a) when not pressed, (b) when pressed FIG. 3 shows a detailed view of the scraper of FIG. 3, (a) is a side view, (b) is a plan view, and (c) is a front view. The intermediate | middle part cleaner of the embodiment is shown, (a) is a top view, (b) is a front view, (c) is a side view. Fig. 6 shows the worn state of the scraper in Fig. 6, where (a) is not pressed and (b) and (c) are pressed. The top view of the scraper of the inversion part cleaner of other embodiment The perspective view of the scraper of the intermediate | middle cleaner of other embodiment Perspective view of conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyor 2 Drive pulley 3 Intermediate pulley 4 Spring 5 Holding shaft 6 Carrier part 7 Inversion part 8 Return part 10, 11 Inversion part cleaner 12, 12a, 12b, 12c, 22, 22a, 22b, 22c Scraper 13, 23 Bolt 13a, 23a Nut 14, 24 Support plate 24a Stopper 15, 25 Bearing 16, 26 Tapered surface 17, 27 Pressure contact surface 18, 28 Fixing bolt 20, 21 Intermediate cleaner

Claims (3)

By attaching a flexible plate-shaped scraper 12 in the belt width direction to the holding shaft 5 disposed in the belt width direction of the belt conveyor 1 and pressing the leading edge of the scraper 12 against the belt surface, In the cleaner device that removes deposits on the belt surface,
The holding shaft 5 is rotatably supported by a bearing 15 of the conveyor frame F, and the scraper 12 rotates around the holding shaft 5 and the scraper tip side surface 17 closely contacts the entire belt width direction. A conveyor belt cleaner, wherein the scraper 12 is pressed against the surface, and the thickness of the scraper 12 gradually decreases from the center in the belt width direction to both ends. By attaching the flexible plate-shaped scraper 22 in the belt width direction to the holding shaft 5 disposed in the belt width direction of the belt conveyor 1 and pressing the leading edge of the scraper 22 against the belt surface, In the cleaner device that removes deposits on the belt surface,
The holding shaft 5 is fixed to a bearing 25 supported by a conveyor frame F so as to be movable up and down, and the scraper 22 has a scraper tip upper surface 27 that is in close contact with the entire length in the belt width as the holding shaft 5 is raised. A conveyor belt cleaner, wherein the scraper 22 is pressed against the surface, and the thickness of the scraper 22 gradually decreases from the center in the belt width direction to both ends.   The scraper is provided so as to be in pressure contact with the belt surface with a width within a range in which deposits on the belt surface are generated with respect to the belt width of the belt conveyor 1. The cleaner apparatus for conveyor belts of description.

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