JPH0720767B2 - Belt cleaner device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a belt cleaner device that removes residual deposits of conveyed products such as coke deposited on the surface of a conveyor belt on the return side of the belt. [Prior Art] A conventional belt cleaner device is disclosed in Japanese Utility Model Publication No. 52-28308 (corresponding foreign patent: US Pat. No. 384) previously proposed by the applicant.
1470, Australian Patent No. 449142), 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. Therefore, the belt has the above-mentioned curving habit (generally referred to as a trough habit), and after the article is dropped, on the return side, which travels in the direction opposite to the forward direction,
The belt is curved in an arc shape so that the central portion in the width direction bulges upward, and when the scraping parts of the cleaner devices aligned in a straight line contact the belt surface, they do not match the curved belt surface. That is, a gap is formed in the widthwise central portion between the scraping portion of the cleaner device and the belt surface.
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, the amount of residual adhered matter on the belt surface is usually large in the central part of the belt and small on both sides of the belt. The central part of the scraped part is severely worn, and the gap between the belt surface and the scraped part 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 material intervenes between the scraper and the adjacent scraper and is sandwiched between them, the independent swinging of the adjacent scraper is hindered and the scraping part is pressed against the belt surface. As described above, 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 that solves the above problems.
In a belt cleaner device comprising a scraper arranged on the return side of the conveyor belt transversely of the belt and for removing residual deposits on the belt surface: the scraper is curved in an arc in contact with the belt surface. An arc-shaped blade that extends and a pivotally adjustable shaft member that has a pivot axis that extends in the transverse direction of the belt; the pivot shaft is disposed at a position that intersects the arc extension line of the blade, and Connected to both ends of the blade; the blade has an arcuate scraping portion that bulges upward when the shaft member is rotated in a direction to erect the blade, at the upper edge portion of the blade; The point is that elastic means is provided to urge the shaft member to rotate in the direction in which the blade stands up. That is, since the rotating shaft is arranged at a position intersecting the arc extension line of the blade and is connected near both ends of the blade, the upward moving distance of the blade is suppressed to be small when the rotating shaft is rotated. At the same time, it is possible to allow a large rotation angle of the blade, which makes it possible to bulge the scraping portion of the blade largely upward, and to prevent the scraping portion from having a trough habit of the belt. It was able to match the curved surface. Further, since the elastic means as described above is provided, the scraper is automatically rotated in the standing direction, and the scraping portion in the state of bulging upward in an arc shape is always kept in the belt surface without a gap. Contact. [Examples] Examples of the present invention will be described in detail below with reference to the drawings. (Basic Example) In FIGS. 1 to 6, the conveyor belt 1 is shown by an imaginary line (two-dot chain line), and only a part of the return side is shown. The term "return side" is a term for the forward side, which is an endless belt that is wound around a driving pulley and a driven pulley and that travels in a loop, and that carries a conveyed object, travels forward, and drops the conveyed object. Yes, it 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 runs 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. On the return side of the belt, a pair of supports 2 and 3 are fixed on both sides of the belt. One support 2 is
The conveyor has a frame (not shown) or a pillar 4 erected from the ground, and a support plate 5 attached to the pillar.
The other support 3 has a support base 6 fixed to a frame of the conveyor or a hopper (neither shown) below the belt, and a support plate 7 attached to the support base 6. A cylindrical bar 8 forming a shaft member is rotatably installed on the support plates 5 and 7 of the pair of supports 2 and 3. That is, the support plates 5, 7
Form the bearing of the bar 8, and the axis of rotation of the bar 8 is the axis A that traverses the belt 1. A scraper 9 is provided on the bar 8, and the scraper 9 is curved so as to bulge toward the return traveling direction R of the belt 1 as shown in FIG. It is configured, and in the illustrated example, the tip 11 is attached to the blade 10. The tip 11 is made of a wear-resistant material such as cemented carbide or ceramics, and is fixed to the curved inner surface of the blade 10 by means of screws or brazing as shown in FIG. Both ends of the scraper 9 are detachably attached to brackets 12 and 12 which are erected on the peripheral surfaces of the rotary shafts 8a and 8b extending from both ends of the bar 8. As a result, the blade 10 with the tip 11 is curved so as to gradually move away from the axis A from both sides of the belt 1 to the central portion, and as shown in FIGS. When the scraper 9 is erected by rotating the rotary shafts 8a, 8b around, the blade 10 has an arcuate shape so as to bulge upward in the central part, and the tip 11 of the upper edge part is the surface of the belt 1. A scraping part 13 is formed that contacts along. At this time, as shown in FIG. 1, the rotating shaft portions 8a and 8b are arranged at positions where the arc extension line Z of the blade 10 and the rotating axis line A intersect with each other, and are connected near both ends of the blade 10. Therefore, when the rotation shafts 8a and 8b are rotated, it is possible to allow a large rotation angle of the blade 10 while suppressing the upward movement distance of the blade 10 to be small. It is possible to make the scraping portion 13 bulge upwards significantly, thereby enabling an upward arcuate posture as shown in FIGS. 2 to 6. Axis A constituted by the bar 8
Can be arranged below the belt 1 as shown in FIG. 5 or above the belt 1 as shown in FIG. In the latter case, not only when the belt 1 travels in the return direction R, but also when the belt 1 travels in the forward direction F, the scraping portion 13 of the scraper 9 is not caught in the belt surface to break the belt. ． As shown in FIG. 3, an outer cylinder member 14 is externally inserted at the protruding end of the bar 8 protruding through the support plate 5 of the one support 2 and fixed by a fixing means 15 such as a set bolt. There is. A receiving plate 16 is extended in the radial direction on the peripheral surface of the outer cylinder member 14, and an elastic means 17 is attached to the receiving plate 16. In this embodiment, the elastic means 17 comprises a leaf spring,
Three types of leaf springs 17a, 17b, 17c having different lengths are sequentially laminated on the receiving plate 16 and integrally fixed to the extended end of the receiving plate 16 by fasteners 18 such as bolts and nuts. The other end of the longest leaf spring 17a is held by a holder 19 detachably attached to the support plate 5. In the illustrated example, a holder 19 is inserted into the support plate 5 in any of a plurality of holding holes 20 which are located on an arc line centered on the axis A and are spaced apart. The holder 19 can be a U-shaped bolt or a J-shaped bolt. By inserting the holder 19 into the predetermined holding hole 20 and holding the leaf spring 17a by the holder 19, the bar 8 is always urged to rotate in the direction in which the scraper 9 is erected, and the scraping portion 13 is removed. Press contact with the surface of belt 1. (Other Embodiment of Scraper Mechanism) FIG. 8 shows another embodiment for supporting the scraper around the axis extending in the transverse direction of the belt. The scraper 9 includes a blade 10 which is curved in a substantially arcuate shape. And has a chip 11 fixed to the upper edge of the blade.
Similar to the one shown in the figure, the support shafts 8a, 8b arranged concentrically on both ends of the scraper 9 are fixed to the support shafts 8a, 8b.
Is rotatably supported by the support plates 5 and 7 of the support. Therefore, the shaft member 8 is composed of both the support shafts 8a and 8b, and the rotation axis of the shaft member 8 causes the axis A to be oriented in the transverse direction of the belt.
Constitutes. FIG. 9 shows an embodiment in which the scrapers are arranged in double and comprises a first scraper 9a and a second scraper 9b. Each of these scrapers 9a and 9b is configured to include a blade. The second scraper 9b has support shafts 8a, 8b forming shaft members at both ends thereof.
8b is rotatably supported on the support plates 5 and 7, thereby forming an axis A directed in the transverse direction of the belt. Both ends of the first scraper 9a are bolted to the second scraper 9b.
It is rotatably supported by adjusting fixing means 8c, 8d such as nuts. Therefore, the bolts of the adjusting and fixing means 8c and 8d form an axis Aa directed in the transverse direction of the belt, and the first scraper 9a is supported so as to be rotatable around the axis Aa. In the case of this embodiment, the second scraper 9b is turned upright about the axis A so that the second scraper 9b is raised.
The scraping portion 13b of the 9b is brought into contact with the surface of the belt 1, and the first scraper 9a is rotated around the axis Aa so that the scraping portion 13a of the first scraper 9a is moved along the surface of the belt 1. Contact them. As a result, when the belt 1 travels in the return traveling direction R, the deposits on the surface of the belt are doubled by the scraping portion 13a of the first scraper 9a and the scraping portion 13b of the second scraper 9b. The belt surface is cleaned by the scraping action. FIG. 10 shows a combination of the scraper of the present invention and a conventionally known belt cleaner for double scraping. The scraper 9 is supported by the shaft member (bar) 8 that traverses the belt, as in the embodiment shown in FIG. A conventionally known belt cleaner 46 is installed on the bar 8. As the known belt cleaner 46, the above-mentioned Japanese Utility Model Publication No. 52-28308 (corresponding foreign patent: US patent No. 3841470, Australian patent No. 449142) is used.
No.) can be adopted. Alternatively, it is possible to employ a device that sprays a fluid such as water onto the belt surface and wipes off the deposits on the belt surface by the spray pressure. (Other Embodiment of Scraper) FIG. 11 shows another embodiment of the scraper 9. The scraper 9 includes a blade 10, a tip 11 fixed to one side surface at the upper end of the blade 10, and It consists of a groove type holder 21 that holds the blade 10. The groove type holder 21 is the first
Like the scraper 9 shown in the figure, the scraper 9 is curved in an arcuate shape, and both ends of the groove type holder 21 are rotatably supported around an axis A oriented in the belt transverse direction. The base of the blade 10 is inserted and fixed in the groove of the groove-type holder 21. Therefore, the blade 10 with the tip 11 may be formed in the shape of an elongated bow that fits the groove type holder 21 as in the embodiment of FIG. 1, but may be made of many short pieces. , The groove-shaped holder 21 may be arranged in series in the groove and inserted and fixed. FIG. 12 shows another embodiment of the scraper 9. The scraper 9 is composed of a ceramic plate, a metal plate, a high hardness rubber plate, etc., and the scraper 9 shown in FIG.
Similarly to the above, the scraper 9 is formed in a blade shape curved in an arc shape, and both ends of the scraper 9 are supported rotatably around an axis A oriented in the transverse direction of the belt. This scraper 9 does not have a separate chip as described above, but the scraper 13 is constituted by the upper end of the scraper 9 itself. (Other Embodiments of Repulsion Means) FIGS. 13 to 17 show other embodiments of the repulsion means 17, respectively. In the embodiment shown in FIG. 13, an arm 22 extending from the peripheral surface of the rotatable bar 8 supporting the scraper 9 and beyond the scraper 9 is provided. A lever 24, which is pivotally supported 23, is arranged above the arm 22. One end of the lever 24 and the end of the arm 22 are connected by a coil spring or the like.
It is connected by 25. A weight is attached to the other end of the lever 24.
25 is attached, and the lever 24 is urged in the counterclockwise direction as shown by the arrow to urge the arm 22 in the lifting direction via the connecting member 25, whereby the scraping portion is always belted. The scraper 8 is urged in the standing direction so that it is pressed against the surface. It is preferable that the weight 25 be adjustable in the axial direction of the lever 24 via a position adjusting means 26 such as a screw with respect to the lever 24. In the embodiment shown in FIG. 14, an arm 27 is vertically provided on a rotatable bar 8 which supports the scraper 9, and a coil spring 28 for resiliently urging the arm 27 to urge the bar 8 counterclockwise.
Is provided. The spring 28 is held by a holding cylinder 29, and a rod for pressing one end of the spring 28 against the holding cylinder 29.
30 is inserted. The rod 30 is screwed onto a holding table 31 so that it can move back and forth. In the embodiment shown in FIG. 15, the rotatable bar 8 supporting the scraper 9 is provided with an arm 32 protruding therefrom.
32 is inserted in the working chamber member 33. Inside the working chamber member 33, an expandable and contractible bag 34 is arranged above the arm 32, and a fluid from a pump 35 is fed to the bag 34. Therefore, when the bag 34 is inflated by being filled with fluid, the bar 32 is rotated counterclockwise by pushing down the arm 32. Since the fluid pressure from the pump 35 acts on the bag 34, the bar 8 is always urged to rotate counterclockwise. In the embodiment shown in FIG. 16, a support shaft 8b for supporting the scraper 9 is divided into a shaft 8e and a shaft 8f, and both split shafts 8e, 8f are connected via an elastic member 8g such as a rubber block. The shaft 8f located at the end is fixed to the support 3 so that the rotational position can be adjusted.
Therefore, by adjusting the rotational mounting position of the shaft 8f with respect to the support 3, the scraper 9 is brought into the rotational standing posture,
With the elastic member 8g being twisted and deformed, the scraping portion 13 is pressed against the belt surface. Therefore, the scraper 9 is rotatable about the center of twist of the elastic member 8g as the axis A, and is urged by the elastic force of the elastic member 8g so as to be constantly in pressure contact with the belt surface. In the embodiment shown in FIG. 17, the scraper 9 is not attached to the bar as described above. Both ends of the scraper 9 are attached to a support member 36, and the support member 36 is a mounting plate.
It is fixed to 37 via an elastic member 38 such as a rubber block. The mounting plate 37 is a bracket 40 that is erected on the frame 39.
Can be attached to. The frame 39 is supported by columns and the like, and its rotation is adjustable, and it is fixed at the adjustment position. Therefore, if the mounting plate 37 is fixed in an inclined posture by adjusting the rotational position of the frame 39, the scraper 9
Is in contact with the belt surface in a state where the elastic member 38 is elastically deformed, and is constantly urged in the direction of the arrow in the figure by the elastic force of the elastic member 38. In other words, in this embodiment, the elastic member 38 includes the axis A and the scraper 9
Can rotate around this axis A. (Embodiment without Ejection Means) In the embodiment shown in FIG. 18, the device of the present invention does not include the above-mentioned epulsion means. An arm 41 is attached to the rotatable bar 8 supporting the scraper 9.
The arm 41 is connected to the advancing / retreating adjustment member 43 via a joint 42. The advancing / retreating member 43 is composed of, for example, a bolt screwed into a nut 45 fixed to a base 44, and is capable of axially advancing / retreating adjustment through a screw connection. The joint 42 transmits the movement of the advance / retreat adjusting member 43 to the arm 41. When the advancing / retreating member 43 is screwed, the bar 8 is rotated counterclockwise, and the scraping portion of the scraper 9 is pressed against the belt surface. Therefore, the scraping unit scrapes off and removes the residual deposits on the belt surface. When the scraping part is worn and a gap is formed between the scraping part and the belt surface, the advance / retreat adjusting member 43 is again screwed to bulge the arcuate scraping part upward. Stand up,
The scraping part may be brought into contact with the curved surface of the belt. In the present invention, since the scraping portion curved in an arcuate shape is in contact with the surface of the belt having an arcuate cross section, the pressure for strongly pressing the scraping portion onto the belt surface is not necessary.
Therefore, the desired scraping effect can be sufficiently expected without providing elastic means as in the embodiment shown in FIG. As shown in FIG. 1, when the scraper 9 is arranged so as to bulge in the return traveling direction R of the belt 1 in a bow shape,
When the residual adhered matter on the surface of the belt is scraped off, the scraped matter scraped off in the vicinity of both ends of the scraper 9 is collected in the central part as the belt advances, and becomes a lump and falls into the hopper below the belt. ． However, in the case of the embodiment of FIG. 7 and the embodiment of FIG. 18, the scraper 9 does not rotate more than necessary in the upright direction and does not bite into the belt surface, and stops without rotating at a predetermined position. Therefore, it is possible to arrange the scraper 9 in the direction opposite to the direction shown in FIG. 1, that is, so that the scraper 9 bulges in a bow shape in the direction opposite to the return traveling direction R of the belt 1. it can. [Advantage of the Invention] According to the present invention as set forth in the first aspect of the invention, the blade 10 constituting the scraper 9 is supported so as to be pivotally adjustable about the axis A which is oriented in the transverse direction of the belt.
The upper edge of the blade 10 which contacts the belt surface is formed so as to gradually move away from the axis A from both sides of the belt to the center, Since the edge part constitutes the arcuate scraping part 13 which bulges upward, even if the belt has an arcuate trough habit and the belt surface is worn at the center part,
The scraping portion 13 can be brought into contact with and in contact with the belt surface without forming a gap between the scraping portion 13 of the blade 10 and the belt surface, and residual deposits on the belt surface can be suitably scraped. There is an effect that can be done. With respect to this point, even if the blade 10 is formed into an arcuately curved arcuate shape, the rotary shaft portion 8 that defines the rotary axis A thereof is formed.
If a and 8b are provided away from the blade 10, the farther this is, the more the object of the present invention cannot be achieved. That is, in this case, the turning radius connecting the turning axis A and the blade 10 becomes a long distance, and in order to turn the blade 10 by a predetermined angle in the standing direction, a large moving distance of the blade is allowed. You have to do it. However, since the belt cleaner device of the present invention is installed in a narrow space below the conveyor belt, it does not have a space for moving the blade 10 upward and downward over a long distance. Therefore, according to the present invention, the rotary shaft 8 defining the axis A is
Is arranged at a position intersecting the arc extension line Z of the blade 10 and is connected near both ends of the blade 10, the turning radius connecting the turning center A and the blade 10 is as small as possible. Therefore, when the rotating shaft 8 is rotated, it is possible to allow a large rotation angle of the blade 10 while suppressing the upward movement distance of the blade 10 to a small extent. The structure was designed so that it could bulge upwards significantly, and the intended purpose could be achieved. Further, according to the present invention as set forth in claim 2, since the blade 10 is urged by the elastic means 17 to rotate in the upright direction so as to press the scraping portion 13 against the belt surface, When the scraping portion 13 is worn, the scraper 9 automatically rotates the blade 10 in the upright direction so that the scraping portion 13 always contacts the belt surface without a gap in a state where the blade 10 bulges upward in a bow shape. Even if the standing state of the blade 10 is not adjusted, a good scraping function can always be achieved.

[Brief description of drawings]

FIG. 1 is a plan view showing a belt cleaner device according to an embodiment of the present invention, FIG. 2 is a front view of the device, and FIG. 3 is a side view showing a part of the device cut away and a part thereof shown in section. Fig. 4 is an enlarged vertical cross-sectional view of the scraper of the same device, Fig. 5 is a side view of the scraper of the same device in a state in which it is rotated upright, Fig. 6 is a front view of the same, and Fig. 7 is an axial line A. FIG. 8 is a side view showing an embodiment in which the position is changed, FIG. 8 is a plan view showing another embodiment of the support shaft constituting the axis A, and FIG. 9 is a plan view showing an embodiment in which scrapers are arranged in double. FIG. 10 is a plan view showing an embodiment in which the scraper of the present invention and a conventionally known cleaner device are combined, FIG. 11 is an enlarged vertical sectional view of another embodiment of the scraper, and FIG. 12 is still another embodiment of the scraper. FIG. 13 is a side view illustrating another embodiment of the elastic means,
FIG. 14 is a side view for explaining another embodiment of the elastic means,
FIG. 15 is a side view explaining another embodiment of the elastic means,
FIG. 16 is a plan view illustrating still another embodiment of the elastic means,
FIG. 17 is a side view for explaining still another embodiment of the elastic means,
FIG. 18 is a side view for explaining an embodiment in which no elastic means is provided. 1 …… Belt, 8 …… Shaft member, 9 …… Scraper, 10 …… Blade, 13 …… Scraping part, 17 …… Elastic means, A …… Axis line.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B65G 45/16 Z 9245-3F

Claims (2)

[Claims] 1. A belt cleaner device comprising a scraper arranged on the return side of a conveyor belt in the transverse direction of the belt for removing residual deposits on the surface of the belt: the scraper (9) contacting the surface of the belt. An arc-shaped blade (10) that is curved and extends in a bow shape, and a rotation-adjustable shaft member (8) that has a rotation axis A that extends in the belt transverse direction.
The rotating shaft (8) is arranged at a position where the arc extension line Z of the blade (10) and the rotating axis A intersect with each other, and is connected to both ends of the blade (10). The blade (10) has an arcuate scraping portion (13) that bulges upward when the shaft member (8) is rotated in a direction to erect the blade (10). A belt cleaner device characterized by being configured at the upper edge. 2. In a belt cleaner device comprising a scraper arranged on the return side of a conveyor belt in the transverse direction of the belt and removing residual deposits on the belt surface: the scraper (9) is in contact with the belt surface. An arc-shaped blade (10) that is curved and extends in a bow shape, and a rotation-adjustable shaft member (8) that has a rotation axis A that extends in the belt transverse direction.
The rotating shaft (8) is arranged at a position where the arc extension line Z of the blade (10) and the rotating axis A intersect with each other, and is connected to both ends of the blade (10). The blade (10) has an arcuate scraping portion (13) that bulges upward when the shaft member (8) is rotated in a direction to erect the blade (10). A belt cleaner device, characterized in that it is provided at the upper edge portion; and further provided with a resilient means (17) for urging the shaft member (8) to rotate in the direction in which the blade (10) stands.