JPH0312733Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a belt cleaner device that removes residual adhesion from the belt surface when conveyed objects remain on the belt surface on the return side of a conveyor belt. Regarding.

[Conventional technology and problems]

Conventionally, a belt cleaner device is known in which a plurality of cleaners are installed in the longitudinal direction of a beam and the scrapers of the cleaners are brought into pressure contact with the return side outer surface of a conveyor belt. Since this scraper-type belt cleaner device is configured to scrape off residual deposits on the belt surface with a chip at the tip of the scraper, there is a problem that the chip wears out prematurely.

On the other hand, a belt cleaner device is known that injects a fluid such as water onto the outer surface of the belt on the return side, thereby causing residual deposits on the belt surface to scatter and fall. This fluid injection type belt cleaner device has the advantage that it does not cause wear of parts like the above-mentioned scraper type belt cleaner device.
There is a problem in that it is not possible to completely remove residual deposits such as sticky substances that are firmly attached to the belt surface. In addition, when spraying water, a large amount of water adheres to the belt surface and the conveyed material in the next rotation contains water, so a separate device must be installed in parallel to wipe away the adhered water. There is an unavoidable problem.

[Means for solving problems]

The present invention was devised to solve the above problem, and as a means thereof, a plurality of cleaners are installed in the longitudinal direction of the beam, and the elastically held scraper of each cleaner is attached to the return side of the conveyor belt. In the case where the belt is brought into pressure contact with the outer surface, a nozzle device for injecting fluid onto the return side outer surface of the belt prior to the pressure contact of the scraper is disposed in the vicinity of adjacent portions of the pair of cleaners and is provided on the beam. , a fluid passage communicating with the nozzle device is formed in the longitudinal direction of the beam, and a connection portion of a fluid supply pipe is provided in communication with the fluid passage; a belt return is connected from near the pressure contact portion of the scraper against the belt. A guide plate covering the scraper is provided for each cleaner, facing in the same direction, and a cutout is formed spanning the mutually adjacent edges of the pair of guide plates corresponding to the pair of cleaners, and an opening formed by the cutout is provided. The above-mentioned nozzle device is placed in front of the nozzle device.

Therefore, most of the remaining deposits on the belt surface can be removed by jetting the fluid, and the remaining deposits that were not completely removed from the belt surface even with this jetting are subsequently removed by a scraper. Therefore, the degree of wear of the tip at the end of the scraper is small, the replacement life is extended, and the problems peculiar to conventional scraper-type belt cleaner devices can be solved.

Furthermore, when using liquid for fluid jetting, the liquid adhering to the belt surface can be suitably wiped off with a scraper, and problems specific to conventional fluid jet belt cleaners can be solved.

In particular, the present invention utilizes the beam as opposed to the conventional scraper belt cleaner device in which a plurality of cleaners are installed in the longitudinal direction of the beam and the scrapers of the cleaners are brought into pressure contact with the outer surface of the return side of the conveyor belt. In addition to forming a fluid passage through the beam, a nozzle device is provided on the beam, thereby combining the functions of a conventional fluid injection type belt cleaner device.In this way, although it is one device, it has the functions of two conventional devices. It is characterized by having both. Therefore, unlike the case where two devices, a conventional fluid injection type belt cleaner device and a scraper type belt cleaner device, are installed separately and side by side on a conveyor belt, it is sufficient to install the one device described above. Work is quick and easy;
Furthermore, the cost of the device itself is low.

Furthermore, the present invention provides a guide plate for each cleaner that covers the scraper facing in the belt return direction from near the pressure contact portion of the scraper against the belt, and a pair of guide plates corresponding to a pair of cleaners are provided adjacent to each other. It is characterized in that a notch is formed across the edge, and the nozzle device is exposed to the opening formed by the notch. As a result, the scraping piece of residual deposits scraped off from the surface of the belt falls along the guide plate. Moreover, even if the scraping pieces adhere and accumulate in the opening as a clogging,
When the scrapers in the pair of cleaners are oscillated independently of each other due to vibrations when the belt advances, the adhering deposits are guided so that the mutually adjacent edges of both guide plates are deviated and the opening is distorted. It can be separated from the notch in the board and allowed to fall.

〔Example〕

One embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. distinguished.
That is, on the forward side 1a, the conveyed object A is conveyed and dropped at the winding part, but
After the conveyed object falls, residual deposits B adhere to the belt surface on the return side 1b (therefore, in the present invention, the "return side 1b" refers to the belt surface regardless of whether it is on the winding part or not). Refers to the belt in its travel direction after the conveyed object has fallen in the direction of belt movement). A beam 3 is arranged below the return side 1b of the belt 1, and the beam 3 is supported at both ends by supports 4, 4, as shown in the second figure. That is,
The pillars 4, 4 are appropriately mounted on a fixed member such as a frame or a hopper of a belt conveyor device, and the beam 3
It has a holder 5 for holding. As shown in the third figure, the holder 5 is composed of a pair of divided bodies 5a and 5b, and the beam 3 is held by holding the beam 3 between the two divided bodies and tightening them with bolts 6, 6.
One of the divided bodies 5a is attached to the column 4 with bolts and nuts 7, and the bolt insertion hole of the column 4 is a long hole 8 that is elongated in the vertical direction. Further, a pedestal 9 is located below the holder 5 and is fixed to the column 4 with bolts and nuts 10.
An adjustment bolt 11 is screwed into the holder so that it can move forward and backward. Therefore, by loosening the bolt/nut 7 and pushing up the holder 5 with the adjustment bolt 11, the position of the holder 5 holding the beam 3 can be adjusted in the vertical direction.

As shown in FIGS. 1 and 4, the beam 3 is
It consists of a hollow tubular member, and a bracket 12 extending along the longitudinal direction is fixed to the outer peripheral surface of the beam by welding or the like. In the cleaner 13, a scraper plate 15 and a mounting plate 16 are integrally fixed by sandwiching an elastic body 14 such as rubber, and a bolt 17 protruding from the rear of the mounting plate 16 is connected to the bracket 1 through a nut 18.
It is attached to 2. The scraper plate 15 extends above the elastic body 14 and is provided with a chip base 19 at its extending end. The chip base 19 is attached with a chip 20 that protrudes upward.
The bolt 21 protruding from the rear of the scraper plate 15
It is attached via a nut 22 near the upper end. Thus, the tip 20 is pressed against the outer surface of the return side 1b of the belt 1 via the elasticity of the elastic body 14.

The above constitutes a scraper type belt cleaner device, and the present invention has the following configuration in order to make such a device also have a fluid injection type belt cleaner device.

That is, the beam 3 constitutes a fluid passage 23 with a tubular hollow portion. As shown in the second figure, one end of the passage 23 is closed by a cap member 24 attached to one end of the beam 3, and the other end is a connecting member 25 for connecting a fluid supply pipe (not shown).
is installed. This connecting member 25 is connected to the beam 3
The other end is removably screwed to the housing part 26 and has a strainer inside and a valve housing 27 that has a pressure reducing valve inside, and the end of the valve housing 27 is removably screwed to the fluid supply pipe. It has a connecting part 28 for connecting. A plurality of nozzle devices 29 are arranged on the beam 3 at intervals in the longitudinal direction. In the illustrated example, for four cleaners 13, there is one nozzle device 29 each near the adjacent portion of the pair of cleaners 13, 13 located on both sides (therefore, two in total).
is located. This nozzle device 29 has a fourth
As shown in the figure, it has a nozzle holding cylinder 30 fixed to the outer peripheral surface of the beam 3 by welding or the like, and a nozzle piece 31 inserted into the holding cylinder. The nozzle holding cylinder 3
0 is a fluid discharge hole 32 formed in the peripheral wall of the beam 3
The fluid passageway 23 is connected to the fluid passageway 23 via the fluid passageway 23 . The nozzle piece 31 is inserted into the holding cylinder 30 via a screw means so as to be able to move forward and backward, and is held in an airtight or watertight manner by a packing or the like, although not shown. A fluid supply pipe is connected to the connecting portion 28, and the pressure reducing valve in the valve housing 27 is connected to the handle 33.
When a predetermined amount is opened through the fluid passage 23, the fluid supplied to the fluid passage 23 is injected from the nozzle device 29 under a predetermined pressure. At this time, as shown in the fourth diagram, the injection angle θ of the fluid by the nozzle device 29 is as follows. Preferably, it is about 45 degrees upward from the horizon. Also,
The nozzle piece 31 has a nozzle hole that flatly expands to a wide width (for example, about 30 cm) when the ejected fluid reaches the belt return side 1b.

The nozzle piece 31 is protected by a cap 34 in the illustrated example. This cap 34 is the fifth
As shown in the figure, the outer periphery of an elastic tube 35 made of an elastic material such as rubber is covered with a protective tube 36 made of metal, etc., and the tail end flanges of both tubes 35 and 36 can be attached to and detached from the nozzle piece 31. Screwed tightening ring 37
It is maintained by The elastic tube 35 has an integral tip wall 35a which is shaped like a tube bottom, and a cross-shaped slit 35b is formed in the tip wall. Therefore, when fluid is to be force-fed to the fluid passage 23 and jetted from the nozzle device 29 as described above, the tip wall 35a is elastically deformed by the fluid jetting pressure from the nozzle piece 31 to open the slit 35b. , perform the injection as described above. Meanwhile, stop pumping the fluid,
When no fluid is ejected from the nozzle piece 31, the tip wall 35a elastically recovers to close the slit 35b. Therefore, when scraping residual deposits on the belt surface using only the cleaner 13 without jetting fluid, as in the conventional scraper-type belt cleaner device, the nozzle hole of the nozzle piece 31 removes the accumulated debris. There is no possibility that the fluid will be blocked and the subsequent fluid ejection will be impossible.

Furthermore, in the illustrated embodiment, FIGS.
As shown in the figure, the cleaner 13 has a guide plate 38.
is attached. This guide plate 38 is made of a metal plate or a synthetic resin plate with excellent wear resistance, and is provided for each cleaner 13 in the illustrated example. This guide plate 3 has the same width as the chip 20 and the chip base 1
It has a length from 9 to below the beam 3,
A portion near the upper edge of the plate 38 is sandwiched and held between the chip base 19 and the scraper plate 15 so as to overlap the front side of the scraper plate 15. That is, the tip base 19, the guide plate 38, and the scraper plate 15 are fastened together with bolts 21 and nuts 22. As a result, each guide plate 38 is connected to each cleaner 1.
The cleaner 1 faces in the belt return direction from the vicinity of the pressure contact part (chip 20) with respect to the belt of No. 3.
It will cover 3. Further, the guide plate 38 has a notch 39 opened at a portion corresponding to the nozzle device 29. In the illustrated example, a pair of mutually adjacent guide plates 38, 38 have symmetrical notches 39 facing each other at their adjacent edges, and both the notches 39, 39 form a circular opening. Part nozzle device 2
9 is coming. Therefore, the four guide plates 38 shown in FIG. 2 have the same shape,
Depending on the position of the nozzle device 29, the nozzle device 29 is alternately used upside down. In addition, in the illustrated example, the nozzle device 29
Although the tip of the nozzle device 29 protrudes from the notch 39, the tip of the nozzle device 29 may be configured to be recessed so as not to protrude from the guide plate 38.

Therefore, whether the fluid is injected from the nozzle device 29 or not, the remaining deposits on the belt scraped off by the chips 20 of the cleaner 13 fall appropriately along the guide plate 38. This prevents the particles from accumulating on the elastic body 14 and the nozzle device 29.

Further, when the fluid ejected from the nozzle device 29 is a liquid such as water, the liquid adhering to the surface of the belt 1 is suitably wiped off by the cleaner 13, and this wiped liquid falls suitably along the guide plate 38. This prevents it from being sprayed onto the elastic body 14 or the beam 3.

By the way, when the scraping piece of the residual deposit is dropped along the guide plate 38, it adheres to the notch 39 of the guide plate 38 in the form of a clogging. As this adhesion progresses, it will encourage the accumulation of scraped pieces on the notch 39.
According to the above embodiment, when the scraper plates 15, 15 in the pair of cleaners 13, 13 are caused to swing independently from each other due to vibrations during belt movement, etc., the guide plates 38, 3 of both cleaners 13, 13
The mutually adjacent edges of 8 are shifted from a flush state to be displaced in the belt traveling direction, and as a result,
Since the opening is made difficult, the adhered deposits can be separated from the notch of the guide plate and fall, and the accumulation of scrapings on the notch 39 is prevented.

[Effect of idea]

As a result of the configuration of the present invention as described above, the following remarkable effects are achieved.

(1) Most of the remaining deposits on the belt surface can be removed by jetting fluid, and the remaining deposits that were not completely removed from the belt surface even with this jetting are subsequently removed using a scraper. Therefore, compared to conventional scraper-type belt cleaner devices, the degree of wear of the tip at the end of the scraper is small, and the replacement life of the tip is extended.

(2) When a liquid is used as the jetting fluid, the liquid adhering to the belt surface can be appropriately wiped off with a scraper, and the conveyed object to be placed on the belt in the next rotation will not be impregnated with the liquid.

(3) In particular, in a conventional scraper type belt cleaner device, the beam is used to form a fluid passage, and the beam is provided with a nozzle device, thereby providing the function of a fluid injection type belt cleaner device. As a result, although it is a single device, it has the functions of two devices, so the installation work is quick and easy, and the cost of the device itself is low.

(4) Also, since each cleaner is equipped with a guide plate,
Scraping pieces of residual deposits scraped off from the belt surface are suitably dropped below the cleaner along the guide plate, and such scraping pieces are deposited on the elastic body of the cleaner. Therefore, there is no problem such as corrosion of the metal parts of the cleaner or deterioration of the elastic material parts due to adhesion and accumulation of the scraping pieces.

(5) Furthermore, when installing the nozzle device, the nozzle device is placed near the adjacent portions of the pair of cleaners, and a notch is formed across the mutually adjacent edges of the pair of guide plates corresponding to the pair of cleaners. Since the nozzle device faces the opening formed by the notch, the scraping piece of residual deposits scraped off from the surface of the belt falls along the guide plate, so that the opening is visible. Even if the deposit builds up in the form of a blockage, when the scrapers in the pair of cleaners swing independently from each other due to vibrations when the belt moves, the mutually adjacent edges of both guide plates are displaced and the opening is made difficult. , the adhered deposits can be separated from the notch of the guide plate at an early stage and allowed to fall, thereby maintaining the desired fall guiding function of the guide plate and the desired fluid jetting function of the nozzle device.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of a belt conveyor to which the belt cleaner device of the present invention is applied, FIG. 2 is a partially cutaway front view showing an embodiment of the present invention, and FIG. FIG. 4 is an enlarged cross-sectional view taken along the - line in FIG. 2, and FIG. 5 is an enlarged cross-sectional view showing the cap of the nozzle piece. 1...Belt, 1b...Return side, 3...Beam, 12...Bracket, 13...Cleaner,
14...Elastic body, 15...Scraper plate, 16...
...Mounting plate, 19...Chip base, 20...Chip, 23...Fluid passage, 25...Connection material, 28...
...Connecting portion, 29... Nozzle device, 34... Cap, 35b... Slit, 38... Guide plate, 3
9...Notch.

Claims (1)

[Claims for Utility Model Registration] A plurality of cleaners 13 are installed in the longitudinal direction of the beam 3, and the elastically held scraper 15 of each cleaner 13 is brought into pressure contact with the outer surface of the return side of the conveyor belt: A nozzle device 29 that injects fluid onto the return side outer surface of the belt prior to the pressure contact of the scraper 15 is provided on the beam 3 near the adjacent portion of the pair of cleaners 13, 13, and A fluid passage 23 is formed which communicates with the nozzle device 29 in the direction, and a connection part 28 of a fluid supply pipe is provided in communication with the fluid passage 23; a pressure contact part 2 of the scraper 15 with respect to the belt.
The guide plate 38 that covers the scraper 15 faces the belt return direction from the vicinity of the cleaner 1.
3, and a pair of cleaners 13, 13.
Notches 39, 39 are formed across mutually adjacent edges of a pair of guide plates 38, 38 corresponding to
A belt cleaner device characterized in that the nozzle device 29 is made to face an opening formed by 9 and 39.