JP2005225587A - Cleaner device for conveyor belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a glance check a scraper which has reached a wear limit. <P>SOLUTION: The scraper 15 which is made of an elastic material is bent and attached at a retaining shaft 11 disposed in a belt B width direction of a belt conveyor 1. A top edge tip 15a is brought into pressure contact with a belt B surface so that the top edge may be supported by the elastic force of the scraper 15 itself in a shaft circumferential direction of the retaining shaft 11. The pressure contact position of the top edge tip 15a moves in the support direction on the belt B surface together with the friction, and when it reaches the wear limit, it passes the shortest distance position p from the retaining shaft 11 on the belt B surface. Then, it is energized further, and the top edge of the scraper 15 is completely separated from the belt B surface to be tilted and stopped on the opposite side of the first pressure contact position with the shortest distance position p sandwiched. Therefore, the gathered deposit do not affect the whole of the scraper 15, and a difference of the direction of the scraper 15 can be clearly checked, thus facilitating to discover that the wear limit exceeds. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cleaner device for removing deposits on the surface of 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. As shown in FIG. 4, the belt conveyor 1 wraps a rubber belt B having a predetermined width between a driving pulley 2 and a driven pulley (not shown), and rotates the driving pulley 2 to rotate the belt B. It makes the circuit move between both pulleys. Of the belt B that circulates, the conveyed product is placed on one end of the upper surface of the belt B of the carrier unit 6 positioned on the upper side, and the conveyed product is conveyed from one end of the conveyor 1 to the other end as the belt B moves. In the reversing portion 7 at the other end, the belt B is reversed to the return portion 8 positioned on the lower side as indicated by an arrow a shown in FIG. It is dropped and taken off.

  In a conveyor using this type of rubber belt B, the conveyed product tends to adhere to the surface of the belt B, particularly when a wet conveyed product is placed thereon. If this amount of deposits increases, the belt B is meandering with the center of gravity deviating, and the end of the belt B may be damaged by touching the frame. In addition, if the deposit falls to the floor or the like in the middle, not only will the efficiency of transport deteriorate, but it will be dangerous especially if the transport is flammable. Absent.

  Therefore, the cleaners 9 and 10 are attached in the vicinity of the reversing part 7 or in a predetermined place of the return part 8, and the scraper 5 of the cleaners 9 and 10 is pressed against the surface of the belt B so as to scrape off the adhered matter. doing.

  4, the cleaner device 10 provided in the return portion 8 is configured such that when the tip of the scraper 5 or the belt B is worn, the scraper 5 is biased by the elastic force of the spring 4 in accordance with the wear. Since the tip of 5 is always pressed against the surface of the belt B, the attached matter can be removed as long as the wear of the tip does not exceed a predetermined limit.

  A tip made of a hard material such as cemented carbide or ceramic is attached to the tip of the scraper 5 in order to avoid frequent scraper replacement due to rapid wear. In many cases, the wear amount of the scraper within a range that does not become necessary, or the wear amount of the belt B that reaches the minimum thickness at which the belt B can maintain a predetermined strength is set as the wear limit.

Further, like the cleaner device 9 provided in the reversing unit 7 shown in FIG. 4, the scraper 5 is biased in the direction around the axis of the holding shaft that holds the scraper via the biasing means such as the spring 4. There is a cleaner device that is pressed against the surface of the belt B, and there is an example in which a cleaner device having this type of urging means is provided in the return portion 8. (For example, refer to Patent Document 1 and Patent Document 2).
Japanese Patent Laid-Open No. 7-41146 Japanese Patent Laid-Open No. 7-41147

  The cleaner device 10 provided in the return portion 8 presses the scraper 5 against the surface of the belt B from the bottom to the top. Since this pressing position is usually at a relatively low position near the floor surface, it is necessary to look into the portion from the lower side of the conveyor in order to see it close. At this time, since the viewer must bend down, there is a problem that it is difficult to confirm the degree of wear of the scraper 5 provided in the return portion 8.

  Further, a large amount of scraped deposits are accumulated near the tip of the scraper 5, so that the scraper 5 cannot be reliably visually recognized. For this reason, the scraper 5 that has already reached the wear limit and needs to be replaced may be missed.

  In view of this, an object of the present invention is to make it possible to confirm at a glance a scraper that has reached the wear limit.

  In order to solve the above-mentioned problems, the present invention makes it possible to change the pressure contact position of the tip edge of the scraper with the conveyor belt as the scraper tip wears, and when the wear limit is reached, the scraper changes its direction from the belt surface. I tried to leave. If you look at the direction of the scraper, you can see at a glance whether the wear limit has been exceeded.

  Specifically, a scraper in the length direction is attached to the holding shaft arranged in the belt width direction of the belt conveyor, and the tip of the scraper is pressed against the belt surface to remove the deposit on the belt surface. In the cleaner device, the scraper is biased in the direction around the axis of the holding shaft. As a result, the tip at the tip of the scraper is pressed against the surface of the belt, and the position of the pressure contact is reduced from the holding shaft to the tip pressing surface due to wear of the tip. It moves from the pressure contact position toward the shortest distance position from the holding shaft. In the scraper, when the tip reaches the wear limit or before, the pressure contact position passes the shortest distance position, and thereafter, the scraper tip is the first pressure contact position across the shortest distance position. The scraper is automatically energized until it stops facing the other side.

  In this way, after the scraper pressure contact position has passed the shortest distance position, the tip of the scraper is automatically energized and completely separated from the belt surface, so that the entire scraper is not affected by accumulated deposits or the like. Can be seen. At this time, the direction of the scraper from the holding shaft to the tip is such that the scraper is further urged around the axis even after the pressure contact position has passed the shortest distance position. It has moved greatly to the opposite side of the initial contact position. For this reason, the difference in the direction of the scraper can be clearly recognized, and it is easy to discover that the wear limit has been exceeded. Further, when the scraper is replaced, the scraper and the belt are separated from each other. Therefore, the scraper can be removed without touching the belt at that position, and the operation is simple.

  The distance between the belt surface and the holding shaft should be set to be equal to or greater than the distance from the holding shaft to the pressure contact surface of the tip when the scraper tip that is pressed against the belt is worn down and reaches the wear limit. For example, when the tip reaches the wear limit or before, the pressure contact position of the scraper passes through the shortest distance position. As used herein, the wear limit is preferably a state in which the chip is completely worn out.

  Further, the urging means is configured such that the scraper is made of an elastic material, the scraper is bent along the holding shaft, and the tip of the tip is pressed against the belt surface in the bent state. If the elastic force (restoring force) that returns to the state is automatically urged in the direction around the axis, the urging means need not be provided separately from the scraper, and the structure of the cleaner device is simplified.

  Since the present invention is configured as described above, the progress of wear can be grasped at a glance by looking at the pressure contact position of the scraper, and the scraper that has reached the wear limit is not overlooked.

  An embodiment is shown in FIGS. 1 to 3, and a conveyor belt cleaner device 20 of this embodiment has a predetermined width of rubber between a driving pulley 2 and a driven pulley (not shown) as shown in FIG. The belt B is wound around the surface of the belt B of the belt conveyor 1 where the belt B is wound around and rotated around the drive pulley 2 to rotate the belt B between the two pulleys.

  As shown in FIG. 1, the cleaner device pressed against the belt surface of the conveyor belt B includes a reversing unit cleaner device 9 that presses the reversing unit 7 toward the surface of the belt B from the outside of the conveyor 1. After the belt B is reversed to the return portion 8, between the intermediate pulley 3 provided on the return portion 8 and the drive pulley 2, the return portion cleaner device 20 presses the belt B from the lower side upward to the belt B surface. Become. Each of the cleaner devices 9 and 20 includes a holding shaft 11 disposed in the belt width direction of the belt conveyor 1 and a scraper held along the holding shaft 11.

  The name and usage of the belt conveyor 1 are the same as those in the conventional example, and the cleaner device 9 provided in the reversing unit 7 is also the same as that in the conventional example, so that the description thereof is omitted.

  As shown in FIG. 1, the cleaner device 20 provided in the return portion 8 includes a holding shaft 11 disposed in the width direction of the belt B and a scraper 15 erected on the holding shaft 11 below the return portion 8. Have. The holding shaft 11 is inserted into bearings 16 provided on the frames F on both sides with the belt B interposed therebetween, and the tip of the bolt 17 is pressed against the peripheral surface of the holding shaft 11 by a set bolt 17 screwed into the bearing 16. Thus, the holding shaft 11 is fixed so as not to move in the axial direction and around the axis.

  2B, the vertical position of the bearing 16 with respect to the belt B can be adjusted by a pressure adjusting bolt 14 provided on the frame F. As shown in FIG.

  As shown in FIG. 2A, the scraper 15 is divided into a plurality of parts in the width direction of the belt B and is attached to the holding shaft 11 in parallel without any gap. The scraper 15 is configured such that a plate 15b is attached to a flexible rubber plate-like elastic body portion 15c with a fixing bolt 13 with a nut 15 attached thereto, and the belt B is directly attached to the tip of the plate 15b. A chip 15a made of a cemented carbide or ceramics that touches the surface is joined. Of these, the scraper 15 is attached to the holding shaft 11 by fastening the elastic body portion 15c to the fixing plate 11a provided on the holding shaft 11 shown in FIG.

  When the cleaner device 20 having the scraper 15 is attached to the belt conveyor 1, the elastic body portion 15c of the scraper 15 is held by the holding shaft toward the belt B circumferential direction of the return portion 8 as shown by an arrow A in FIG. 11 along the curve. In this state, the holding shaft 11 is inserted into the bearing 16, and the set bolt 17 is screwed and fixed so as not to move. Then, by rotating the pressure adjusting bolt 14, the height direction position can be adjusted, and at the same time, the degree of curvature of the scraper 15 can be adjusted.

  The direction of the scraper 15 with respect to the surface of the belt B is the intersection of the perpendicular lines c dropped from the holding shaft 11 to the surface of the belt B, that is, the shortest distance from the holding shaft 11 on the surface of the belt B shown in FIG. The tip of the scraper 15 is positioned on the left side in the drawing (forward in the circumferential direction) from the position p. Further, the direction of the scraper 15 after bending is such that the tip of the scraper 15 is located on the right side (rear in the circumferential direction) in the drawing with respect to the shortest distance position p.

  As shown in FIG. 3, the pressure contact with the surface of the belt B is caused by the elastic force of the elastic body portion 15c of the scraper 15 to return to the state before the bending, as indicated by the arrow B in the figure. The scraper 15 is urged in the direction around the axis, so that the tip 15a at the tip of the scraper 15 comes into pressure contact with the surface of the belt B.

  When the belt conveyor 1 is used in this pressure contact state, the scraper 15 of the cleaner device 20 removes the deposits that could not be removed by the cleaner device 9 of the reversing unit 7 so as to scrape off at the return unit 8 as the belt B circulates. Go. Since the tip 15a of the scraper 15 slides on the surface of the belt B, the pressure contact surface gradually wears, and the surface of the belt B gradually wears, and the thickness of the belt B becomes thin.

  With this wear, the length of the scraper 15 from the holding shaft 11 to the pressure contact surface is shortened, the length is shortened, and the tip is gradually pressed to the left side by the urging force of the elastic body portion 15c, and the degree of curvature is reduced. Is getting smaller. That is, the pressure contact position of the tip 15a to the surface of the belt B extends from the first pressure contact position indicated by a solid line on the right side of FIG. 3 to the shortest distance position p indicated by a chain line in the center of the drawing. As shown by the arrow B, it automatically moves gradually.

  The height of the holding shaft 11 of the cleaner device 20 reaches a wear limit at which the tip 15a is not worn out when the pressure contact position of the scraper 15 reaches the shortest distance position p indicated by a chain line in the center of FIG. The distance between the holding shaft 11 and the surface of the belt B is set so as to be in the state just before reaching the state. For this reason, when the pressure contact position reaches the shortest distance position p, it can be said that the scraper 15 reaches a predetermined wear amount and needs to be replaced. When the belt conveyor 1 is further used in this state, the pressure contact surface of the chip 15a of the scraper 15 is further worn and shortened, and the tip of the scraper 15 is further urged as indicated by an arrow C and passes through the shortest distance position p. This urging automatically acts on the scraper 15 until there is no restoring force (elastic force) to return to the state before the bending, and the urging force around the holding shaft 11 disappears.

  When the tip of the scraper 15 passes the shortest distance position p, the length from the holding shaft 11 to the pressure contact surface of the scraper 15 tip is already shorter than the distance from the holding shaft 11 to the surface of the belt B. The tip of the scraper 15 does not reach the surface of the belt B. For this reason, the scraper 15 is released from the pressure contact with the surface of the belt B, and as shown by a solid line on the left side in FIG. 3, the scraper 15 tilts at a stretch toward the opposite side of the first pressure contact position across the shortest distance position p. To do. When the scraper 15 reaches a position before being bent, the restoring force of the scraper 15 is lost, and the urging force around the holding shaft 11 is lost, and the scraper 15 stops moving.

  In the process of moving the series of pressure contact positions, the pressure contact position in a state where the scraper 15 has reached the wear limit is set as the shortest distance position p shown in FIG. 3, and from the first pressure contact position when the new scraper 15 is attached. If the change of the pressure contact position toward the shortest distance position p is gradually observed, the progress of wear can be grasped at a glance without observing details of the pressure contact surface of the tip 15a. At this time, setting the pressure contact position when the wear limit is reached on the right side (rear in the circumferential direction of the belt B) in the drawing with respect to the shortest distance position p is a safe measure, so that it does not matter.

  As shown in FIG. 2A, the scraper 15 is divided in the width direction of the belt B, and the divided scraper 15 is attached in parallel along the axial direction of the holding shaft 11 without a gap. Therefore, each of them is deformed separately when it is bent. For this reason, even when there is a difference in the degree of wear of the scraper 15 or the surface of the belt B along the width direction of the belt B, each of the divided scrapers 15 is separately curved at the respective pressure contact positions so as to have an appropriate pressure contact state. Can be maintained.

  In this embodiment, the attachment position of the cleaner device 20 is provided between the drive pulley 2 below the return portion 8 and the intermediate pulley 3 as shown in FIG. 1, but the installation location is not limited. The return unit 8 or the reversing unit 7 other than this place can also be used. Note that the installation angle of the scraper with respect to the surface of the belt B, that is, the angle of the scraper 15 before bending with respect to the surface of the belt B and the same angle when bent, can be freely set according to the urging force and pressure contact strength required. Can be set to

  In this embodiment, the cleaner device 9 is arranged in the reversing unit 7 and the cleaner device 20 is arranged in the return unit 8 in parallel. However, the present invention is not limited to this embodiment. Accordingly, a configuration in which the cleaner 9 of the reversing unit 7 is omitted may be employed.

  The scraper 15 can be made of any material as long as it has an elastic body portion 15c having elasticity in any part of the scraper 15 in order to give the urging force. Further, the scraper 15 as a whole may be an elastic body portion 15c made of an elastic body, and the tip of the elastic body portion 15c may form the tip 15a. In this case, a separate chip 15a may be attached, or an elastic material integrated with the elastic body portion 15c may be used.

A case where the bending direction of the scraper 15 is reverse is also conceivable, that is, in the aspect shown in FIG. 3, the rotating direction of the belt B is opposite to the arrow A in the drawing. The action of the pressure contact between the scraper 15 and the surface of the belt B for scraping off the adhering matter is the same, and the action by the biasing is also the same.
Further, a configuration in which the scraper 15 itself is not divided in the width direction of the belt B can also be adopted, and even in the case of division, the division location and the number of division are arbitrary.

  Further, in this embodiment, in order to urge the scraper 15, an elastic body portion 15 c is provided on the scraper 15 and the urging force is applied by bending the elastic body portion 15 c, but the urging means is used as the scraper 15. By providing separately from 15, the structure used as the scraper 15 which does not have the elastic-body part 15c can be employ | adopted. The urging means provided separately may be a known elastic material such as a spring that is attached to the holding shaft 11 or the scraper 15 and applies an urging force to the scraper 15 around the holding shaft 11, The holding shaft 11 may be rotated or the scraper 15 may be pressed by supplying pressure fluid to a separately provided circuit, and the biasing means of the scraper is not limited to this embodiment.

Sectional drawing which shows one Embodiment The cleaner apparatus of FIG. 1 is shown, (a) is a front view, (b) is a side view. Schematic diagram showing the pressure contact state of the scraper Cross section of conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Belt conveyor 2 Drive pulley 3 Intermediate pulley 5,15 Scraper 6 Carrier part 7 Inversion part 8 Return part 9,10,20 Cleaner apparatus 11 Holding shaft 12,13 Mounting bolt 14 Pressure adjustment bolt 15a Tip 15b Plate 15c Elastic body part 16 Bearing 17 Set bolt B Belt p Shortest distance position

Claims (2)

The scraper 15 in the length direction is attached to the holding shaft 11 disposed in the belt width direction of the belt conveyor 1, and the chip 15a at the tip of the scraper 15 is pressed against the surface of the belt B. In the cleaner device to remove
The scraper 15 is urged in the direction around the holding shaft 11, and the tip 15a at the tip of the scraper is pressed against the surface of the belt B by the urging, and the pressure contact position is determined by the wear of the tip 15a. 11 and the tip 15a pressure contact surface is shortened, and the belt B surface is automatically moved from the first pressure contact position toward the shortest distance position from the holding shaft 11,
When the tip 15a reaches the wear limit or before, the pressure contact position passes the shortest distance position, and thereafter, the tip of the scraper 15 is opposite to the first pressure contact position across the shortest distance position. A cleaner device, wherein the scraper is automatically energized until it stops facing the side.   The scraper 15 is made of an elastic material, and the scraper 15 is bent along the holding shaft 11, and the tip 15a at the tip is pressed against the surface of the belt B in the bent state, so that the scraper 15 returns to the state before the bending. The cleaner device according to claim 1, wherein the cleaner device is automatically urged in a direction around the axis of the holding shaft 11 by an elastic force.

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