JPH0720766B2 - Belt cleaner device and scraper used in the device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a belt cleaner device for removing residual deposits of conveyed products such as coke deposited on the surface of a conveyor belt on the return side of the belt, and Regarding the scraper used in the device. [Prior Art] A conventional belt cleaner device is disclosed in US Pat. No. 3841470.
As shown in No. 6, it has a plurality of cleaner bodies arranged on the return side of the conveyor belt in the transverse direction of the belt. In these cleaners, the scraping part that contacts the belt surface is aligned in a straight line. Specifically, a scraper having a scraping part composed of chips at the upper end is elastically supported by an elastic member such as a rubber block, and the scraping part is pressed against the belt surface through elastic deformation of this elastic member. There is. [Problems to be Solved by the Invention] Generally, when a conveyor belt is wound endlessly between a driving pulley and a driven pulley and travels around,
In the forward process of loading and transporting the transported items (forward side), in order to stably load the transported items, the guide pulleys arranged with a trough angle support the belt cross section so that it has an arched shape. ing. That is, on the forward side of the belt that carries the conveyed items and travels forward, the center portion of the belt in the width direction is curved and supported so as to bulge downward. As described above, since the conveyed articles are repeatedly loaded on the central portion of the curved surface of the belt, the central portion of the belt surface is worn more than the both side portions. As described above, the belt has the above-mentioned curl (generally referred to as a trough habit), and after the conveyed object is dropped, the belt is moved backward in the direction opposite to the forward direction, and the belt is It is curved in an arcuate shape so that the central part in the width direction bulges upward. Therefore, in the case of the above-described conventional cleaner device, when the scraping portions of the cleaner bodies aligned in a straight line contact the belt surface, they do not match the curved belt surface. That is, a gap is formed at the central portion in the width direction of the belt between the scraping portion of the cleaner device and the belt surface which are aligned in a straight line. This gap becomes larger as the wear of the central part of the belt progresses as described above. as a result,
In the central part of the belt, the scraping part of the cleaner device cannot scrape off the deposits on the belt surface well. Moreover, a large amount of residual deposits on the surface of the belt is generated in the center of the belt.
Usually, both sides of the belt are small, and the scraping amount of the adhered matter by the scraping unit corresponds to this, so that the wear of the centrally located part of the scraping units arranged in a straight line. The gap between the surface of the belt and the scraping part is gradually increased, and the gap is gradually increased. Further, as described above, since the plurality of cleaner bodies each have the scraper elastically supported by the elastic member, and each scraper swings independently, when one scraper tilts, When the scraped foreign matter intervenes between the scraper and the adjacent scraper and bites between them, the independent swinging of the adjacent scraper is obstructed, and the scraped part is pressed against the belt surface. This causes a situation in which the scraper cannot return and rotate from the tilted position to the original position. [Means for Solving the Problems] The present invention provides a belt cleaner device and a scraper used in the device, which solve the above problems. According to the belt cleaner device of the present invention, the scraper is disposed on the return side of the conveyor belt in the transverse direction of the belt and removes the residual deposits on the surface of the belt. The scraper is oriented in the transverse direction of the belt. The scraping part, which is supported so as to be rotatable about the axis and is in contact with the belt surface of the scraper, gradually moves away from the axis toward the return traveling direction of the belt from both sides of the belt to the central part. It is curved and formed. Therefore, when the scraper is rotated around the above-mentioned axis to stand up, the scraping part has an arcuate shape so that the central part bulges upward. Therefore, as described above, the belt has the bow-shaped trough habit, and even when the central part of the belt surface is worn, the scraping part of the scraper can be brought into contact with the belt surface in conformity, The conventional problems mentioned above can be solved. Further, according to the scraper of the present invention, a large number of supporting members provided with scraping portions are embedded in the elastic member in a parallel state, and adjacent supporting members are flexibly connected to each other through the elastic member. There is. Therefore, even if the scraper is not formed in a predetermined bow shape in advance, when the scraper is attached to the holder of the belt cleaner, the scraper is bent and bent.
It is possible to respond appropriately to the trough habit of the belt under a predetermined radius of curvature. Further, according to the scraper of the present invention, the supporting member embedded in the elastic member is connected via the connecting portion so as not to separate the adjacent supporting members from each other in the belt traveling direction. Therefore, when one of the adjacent support members swings in the traveling direction of the belt, the other support member also swings along with the support member. The member swings independently in the belt traveling direction, and the adhered matter scraped between the scraping portions of the adjacent support members is intervened in a biting manner to return the support member to the original position. There is nothing to prevent. [Embodiment] A preferred embodiment of the present invention will be described in detail below with reference to the drawings. In the drawing, the conveyor belt 1 shows only a part on the return side. This "return side" is a term for the forward side, which is the endless belt that is wound around a driving pulley and a driven pulley and that travels in a loop, that carries a conveyed object, travels forward, and drops the conveyed object. This means the part of the return process in which after the article is dropped, it is folded back at the winding part on the pulley and travels backward in the direction opposite to the forward direction. Therefore, the process of being located on the pulley immediately after the turning point is included. (Overall Configuration of Belt Cleaner Device) On the return side of the belt 1, a pair of supports 2 are fixedly provided on both sides of the belt 1. Although only one support 2 is shown in the drawing, the other support has the same configuration as the one support 2 and is symmetrically configured with the belt 1 interposed therebetween. The support 2 has a column 4 and a window frame 5 framed in a rectangular shape with the column 4 as one side. The column 4 is fixed to the side wall of a chute or hopper (not shown) arranged below the belt, and the window frame 5 borders a window hole formed in the side wall of the chute or hopper. The pillar 4 is provided with a rod 6 extending in the vertical direction, and the upper and lower ends of the rod 6 are provided at the pillar 4.
It is supported by support plates 7 and 8 fixed to the. A slide body 9 is slidably inserted in the middle of the rod 6, and is fixed at a predetermined position by a fixing means 10 such as a set bolt. A pair of holding arms 11 and 12 are provided on the sides of the slide body 9 so as to extend in the direction crossing the window frame. The arms 11 and 12 are arranged at intervals in the vertical direction, and the tips of both arms 11 and 12 are connected by a pin 13.
In the case of the example shown in the figure, the pin 13 is composed of a head bolt, the upper holding arm 11 is inserted, and the lower holding arm 12 is screwed. The scraper 14 is a holder 15 formed in a substantially arcuate shape so as to bulge in the return traveling direction R of the belt 1.
Removably retained by the fixing means such as a set bolt 16
(Figs. 5 and 6). That is, the scraper 14 is curved so as to fit the arched holder 15, and is attached to the holder 15 in a curved state. Fourth
As shown in the figure, the scraper 14 has a chip 17 made of a wear resistant material such as cemented carbide or ceramics at the tip of the back surface.
Is stuck. An upper edge of a flexible sheet 18 such as a rubber sheet is fixed to the back surface of the scraper 14 located below the tip 17, and the sheet 18 is hung downward so as to cover the back of the scraper 14. ing. Scraper 14
Details of will be described later. The holder 15 constitutes a holding means for holding the scraper 14, by holding rail-shaped holding walls 20 and 21 in parallel on a bottom member 19 curved in an arc shape, and a holding groove 40 in the illustrated example. As shown in FIG. 3, both ends of the bottom member 19 and the holding wall 21 of the back portion form extended portions 22, 22 extending in the direction opposite to the return traveling direction R of the belt. Support shaft 23a,
23b is stuck. The support shafts 23a and 23b are arranged concentrically with each other, and are provided with a rotation axis A of the scraper 14 by a common axis line of both support shafts. The holder 15 equipped with the scraper 14 is arranged such that the rotation axis A traverses the belt 1, and the support shafts 23a and 23b are held by the support 2. In this state, scraper 14
Is curved from both sides of the belt 1 to the central portion and gradually moves away from the axis A. As shown in the state of FIG. 5 to the state of FIG.
When the scrapers 14 are erected by rotating a and 23b, the scraper 14 has an arcuate shape so that the upper edge of the tip 17 bulges upward in the central portion and contacts along the curved surface of the belt 1. The scraping unit 32 is configured. When attaching the support shaft 23a to the support 2, the support shaft 23a penetrates the window frame 5 of the support 2 and the holding arms 11, 1
It is inserted between 2. A bearing 24 made of synthetic resin such as nylon is externally attached to the support shaft 23a. The bearing 24 is clamped and fixed to the holding arms 11 and 12 by fastening the pin 13. In this state, the support shaft 23a is rotatable with respect to the bearing 24.
Following the bearing 24, a stopper body 25 is externally inserted on the support shaft 23a and fixed by a fixing means 26 such as a set bolt. This stopper body 25 is provided with a pair of stopper pieces 27 and 28 arranged vertically, and both stopper pieces 27 and 28 are slide bodies 9.
It is located in the vertical direction of the fixing means 10 of. Therefore, as shown in FIG. 7, when the support shaft 23a is rotated, the upper and lower stopper pieces 27 and 28 contact the fixing means 10, whereby the support shaft 23a
The rotation range of is limited. Following the stopper body 25, the actuating body 29 is externally inserted on the support shaft 23a and fixed by a fixing means 30 such as a set bolt. The actuating body 29 includes an actuating arm 31 extending in a direction traversing the window frame 5, and the arm is connected to an elastic means described later. A push-up bolt 41 is screwed into the lower support plate 8, and when the position of the slide body 9 is adjusted up and down with the fixing means 10 released, the push-up bolt 41 pushes down the holding arm 12 below. The slide body 9 can be lifted by pushing up the bottom part. Although not shown, the other support shaft 23b is similarly attached and held to the other support. An elastic means 33 is attached to the side wall of the chute or hopper located above the operating arm 31. The elastic means 33 includes a fixing member 34 fixed to a side wall of a chute or the like.
And a tension member 38 connected to the adjusting member 37, and an adjusting member 37 composed of a hook bolt screwed to the fixing member 34 via nuts 35 and 36 so as to be able to move back and forth. The lower end of the tension spring 38 is connected to the operating arm 31. Therefore, the nuts 35 and 36 are rotated to adjust the adjustment member 37.
When the lever is pulled up, the tension of the spring 38 increases and the actuating arm 31 is pulled upward, and as a result, the support shafts 23a and 23b are constantly urged to rotate the scraper 14 upright, as shown in FIG. The scraping part 32 is pressed against the surface of the belt 1. (Detailed Configuration of Scraper) The scraper 14 has the following structure as shown in FIGS. 8 and 9.
A large number of supporting members 42 made of a metal plate having the tip 17 constituting the scraping portion 32 fixed to the upper end by brazing or the like are arranged in parallel,
The support members 42 are embedded in an elastic member 44 such as natural rubber or synthetic rubber in a state in which a large number of support members 42 are arranged in parallel while the 17 are aligned on the same line. The supporting member 42, as shown in FIG. 10 and FIG.
17 is displaced in the width direction of the support member 42 and fixed, and
One end of the chip 17 protruding from one side of the chip 17 forms a protrusion 17a, and the other side of the support member 42 has the chip 1
The other end of 7 is overlapped to form a recess 17b that is not positioned, and the protrusion 17a of one of the supporting members 42 arranged in parallel is formed into the other supporting member 17
It is fitted in the concave portion 17b of, and the fitting portion constitutes a connecting portion 50 described later. On the other hand, the elastic member 44 is provided with a covering wall 45 covering from the back surface of the supporting member 42 (the surface opposite to the chip mounting surface) to the back surface of the chip 17, a seat wall 46 covering the bottom portion of the supporting member 42, and adjacent to each other. The hinge part 43 filled between the supporting members 42, 42 and the extension parts 47 in which the supporting member 42 is not embedded are integrally formed at both longitudinal ends of the scraper 14. The covering wall 45
Forms an inclined surface 48 so as to reach the upper end of the tip 17 and gradually reduce the wall thickness. Further, when molding the elastic member 44,
On the front surface of the support member 42, the above-mentioned flexible sheet 18 is made of natural rubber,
It is made of elastic material such as synthetic rubber. In such molding, as shown in FIGS. 10 to 12, a large number of the support members 42 to which the chips 17 are fixed in advance are aligned and loaded into the molding die 49 together with the unvulcanized rubber material, and the rubber is This is done by vulcanizing the material. At this time, an adhesive treatment is performed in advance so that the elastic member 44 is firmly adhered to the chip 17 and the support member 42. On the other hand, for the flexible sheet 18, the support member 42
An adhesive treatment is applied in advance so as to adhere to the upper part of the front surface of the chip and the lower end of the chip 17, but the flexible sheet 18 is adhered to the lower part H of the front surface of the support member 42 so as not to adhere. The release distance is positively applied with no agent treatment or with a masking sheet. Thus, although the scraper 14 is formed in a substantially strip shape as shown in the thirteenth illustration, it can be bent as shown in the fourteenth illustration, so that it can be mounted in the curved holding groove 40 of the holder 15. be able to. Since each support member 42 is elastically held in the holding groove 40 via the elastic member 44, the minute vibrations transmitted from the tip 17 to the support member 42 during the work of scraping off the adhered matter on the belt are held by the holder. Resonance with 15 and amplification of noise are prevented. Further, since the adhered matter scraped off by the tip 17 is guided by the flexible sheet 18 and falls to the lower hopper, the adhered matter is prevented from accumulating on the holder 15. Further, the support member 42 in which the elastic member 44 is embedded and juxtaposed includes a connecting portion 50 formed by fitting the protrusion 17a and the recess 17b, and connects adjacent support members 42 so as not to separate from each other in the belt traveling direction. Has been done. Therefore, when one of the support members 42 adjacent to each other swings in the traveling direction of the belt, the other support member 42 also swings along with the other support member 42. It is possible to prevent widening the gap between each other and biting the scraped deposits into the gap. That is, in the case where the adjacent supporting members 42 do not have such a connecting portion 50 and can be rocked independently of each other, each supporting member is moved to the belt while scraping the adhering material on the belt surface. It is possible to swing independently in the direction of travel, widen the gap between the chips of adjacent support members, and intervene in the gap in a scraped-in adherent matter, and return the support member to its original position. While there are problems that prevent
By providing the above-mentioned connecting portion 50, such a problem does not occur. (Other embodiment of connecting portion) Figs. 15 and 16 show another embodiment of the connecting portion 50. That is, in this embodiment, the chip 17 is fixed to the upper end of the support member 42 so as to project from both sides of the support member 42 so as to be slightly longer than the width of the support member 42. Multiple support members aligned
42 are embedded in the elastic member 44 in a state of being arranged side by side. Each support member 42 includes wing piece portions 42a and 42b that extend to both sides of the body portion.
The connecting portion 50 is configured by fitting and connecting the projecting edge of the blade piece portion 42a of the adjacent one supporting member 42 with the concave groove of the blade piece portion 42b of the other supporting member 42. Therefore, the connecting member 50 does not separate the adjacent supporting members 42 in the belt traveling direction. [Effect of the Invention] According to the belt cleaner device of the present invention, when the scraper 14 is rotated around the axis A to stand up, the scraping portion 32 has an arcuate shape so that the central portion bulges upward. Therefore, even if the belt 1 has an arched trough, and the surface of the belt is worn at the center, the scraping portion of the scraper 14 is removed.
The scraping portion can be brought into contact with and in contact with the belt surface without forming a gap between 32 and the belt surface, and residual deposits on the belt surface can be suitably scraped. In particular, according to the scraper 14 of the present invention, the scraper 14 is bendable so as to fit the curved holding means 40 of the holder 15, and therefore the entire scraper 14 is previously held by the holding means 40.
It is not necessary to form the same shape as the curved shape of, and its manufacture is easy. Moreover, the belt 1 to which the belt cleaner device is attached has various belt widths, and therefore the present invention is such that the radius of curvature of the trough habit imparted to the belt is also different. It suffices to design the holding means 40 of 15 so as to adapt to the radius of curvature of the trough habit of the belt, and the scraper 14 itself can be bent to the desired radius of curvature by mounting it on the holding means 40. The range of application can be expanded. Further, in the scraper 14 as described above, in the present invention, the supporting members 42 embedded in the elastic member 44 are connected via the connecting portion 50 so as not to separate the adjacent supporting members 42 from each other in the belt traveling direction. Therefore, when one support member 42 adjacent to the belt is swung in the traveling direction of the belt, the other support member 42 is also swung along with the support member 42. Each supporting member 42 swings independently in the belt traveling direction, a gap is widened between the scraping portions 32 of the adjacent supporting members, and the deposits scraped in the gaps are bitten. It has the particular advantage of not intervening and preventing the support member 42 from returning to its original position. Of course, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the claims based on the spirit of the invention. For example, with respect to the holding means 40 of the holder 15, the holding groove which is curved and continuous is shown in the above-mentioned embodiment, but the holding means 40 is not limited to the continuous groove, but the scraper 14
Partial holding means may be used as long as it holds the bent state. Further, the scraping portion 32 of the scraper 14 may be formed by the tip 17 as in the above embodiment, or may be formed by other members or the upper end itself of the supporting member 42.

[Brief description of drawings]

FIG. 1 is a belt cleaner device according to an embodiment of the present invention, in which a support shaft for a scraper, a support for supporting the support shaft, and an elastic means for rotating and urging the scraper are disassembled. 2 is a side view of the belt cleaner device according to the same embodiment; FIG. 3 is a partial sectional view showing a state where one support shaft of the belt cleaner device according to the embodiment is attached to a support. 4 is a plan view showing the scraper of the belt cleaner device according to the same embodiment taken along the line IV-IV in FIG. 3; FIG. 5 is a belt cleaner device according to the same embodiment; FIG. 6 is a front view of the state in which the scraper is not rotatably raised; FIG. 6 is a front view of the belt cleaner device according to the embodiment in which the scraper is rotatably raised; FIG. 7 is a belt cleaner device according to the embodiment. Is the range of rotation of the support shaft due to the stopper piece FIG. 8 is a vertical sectional view taken along the longitudinal direction of the scraper according to one embodiment of the present invention; FIG. 9 is a sectional view taken along line IX-IX in FIG. FIG. 10 is a vertical sectional view showing a state in which the scraper according to the embodiment is insert-molded with a molding die; FIG. 11 is a vertical sectional view taken along the line XI-XI in FIG. 10; 12 is a longitudinal sectional view taken along line XII-XII in FIG. 10; FIG. 13 is a perspective view showing a normal state of the scraper according to the embodiment; FIG. 14 is a perspective view showing the curved normal state; FIG. 15 is a front view illustrating a state in which a scraper having a connecting portion according to another embodiment is insert-molded with a molding die;
The figure is an enlarged cross-sectional view taken along the line XVI-XVI in FIG. 1 …… Conveyor belt, 2 …… Support, 14 …… Scraper, 15 …… Holder, 17 …… Chip, 18 …… Flexible sheet, 40…
... Holding means (holding groove), 42 ... Support member, 44 ... Elastic member, 50 ... Connecting part.

Claims (4)

[Claims] 1. A belt cleaner for removing residual deposits on the surface of a conveyor belt on the return side thereof: a scraper (14) arranged in the transverse direction of the belt, and a holder (15) for holding the scraper. In the scraper (14), a large number of support members (42) having scraping parts (32) contacting the belt surface are embedded in parallel in the elastic member (44), and adjacent support members (42) are provided. ) Are flexibly connected to each other via the elastic member (44), and
Adjacent support members (42) are connected to each other via a connecting portion (50) so as not to separate from each other in the belt traveling direction; the holder (15) is provided around the axis (A) extending in the belt transverse direction. A state in which the scraper (14) has a rotatable support shaft (23a, 23b) and the scraper (14) is gradually curved away from the axis (A) from both sides of the belt toward the center. And a holding means (40) for holding the belt cleaner. 2. The belt cleaner device according to claim 1, wherein the holding means (40) of the holder (15) comprises groove means for holding the scraper. 3. The belt cleaner device according to claim 1, wherein the holder (15) is supported so as to be rotatable about the axis (A). 4. A support member (42) adjacent to a support member (42), wherein a large number of support members (42) each having a scraping portion (32) contacting the surface of the belt are embedded in an elastic member (44) in parallel with each other in the belt transverse direction. )
Are flexibly connected to each other via the elastic member (44), and adjacent support members (42) are connected to each other via a connecting portion (50) so as not to separate from each other in the belt traveling direction. A scraper used in a belt cleaner device characterized by being formed.