JP6767957B2 - Return road side derailment prevention structure of chain flight type sludge scraper - Google Patents

Description

The present invention relates to a return path side derailment prevention structure for a chain flight type sludge scraper.

Conventionally, as a chain flight type sludge scraper equipped with a guide shoe on the return route side, for example, in the sludge scraper of Japanese Patent Application Laid-Open No. 2014-161769, a plurality of sprocket can be circulated in the settling basin in the longitudinal direction. On the other hand, a pair of chains that are hung endlessly and arranged at a required interval in the width direction perpendicular to the longitudinal direction of the settling basin, and a pair of chains that are attached so as to hang between the pair of chains and in the settling basin. A flight that scrapes sludge, a pond bottom rail that is laid at the bottom of the settling basin so as to extend in the longitudinal direction and guides the sludge scraping run at the bottom of the flight, and its length at a required position inside the settling basin. A return rail that is laid so as to extend in the direction and guides the return run of the flight that has finished the sludge scraping run, and a shoe that is attached to the flight and slides on the pond bottom rail during the sludge scraping run of the flight. In a sludge scraper equipped with a return shoe attached to the flight and sliding on the return rail when the flight returns.
Legs are projected from both width ends of the sliding portion of the shoe with respect to the upper surface of the pond bottom rail, and the width end portion from the width center side of the shoe is provided at the lower end of the leg portion during sludge scraping running of the flight. Forming a tapered part that becomes a downward slope toward the side,
Legs are projected from both width ends of the sliding portion of the return shoe with respect to the upper surface of the return rail, and a hook shape protruding toward the center of the width of the return shoe at the lower end of the leg portion when the flight returns. It is known that the portion is formed and a tapered portion having a downward slope from the width center side to the width end side of the return shoe is formed.
Further, in Patent No. 5727075, in the return route side guide shoe that guides the flight arranged in the chain flight type sludge scraper along the return route side guide rail, the return route side guide shoe slides with respect to the return route side guide rail. The head of the return guide rail has a projecting piece only at one end in the width direction of the surface, and the return guide shoe has a protrusion at both ends of the sliding surface of the return guide shoe with respect to the return guide rail in the width direction. It has a projecting piece portion that is positioned so as to face each other with the portion sandwiched in the middle, and one of the projecting piece portions overlaps with the projecting piece portion of the return path side guide shoe and protrudes downward. At the same time, a configuration is disclosed in which a guide plate is attached so that the space between the projecting pieces is located above the sliding surface.
However, in the former configuration, since the leg portion having the hook leg portion at the lower end is projected at both width ends of the sliding portion with respect to the upper surface of the return rail of the return shoe, the guide is provided for a constant sliding width. The shoe could be large and could not be set compactly. Moreover, it could not be retrofitted to the existing guide shoe.
Further, in the latter configuration, a guide plate is provided so that it can be retrofitted, but even in this structure, the guide plate has a pair of protrusions so as to be sandwiched from both sides in the width direction with respect to each guide rail. Since the protrusion protrudes downward from the protrusion of the guide shoe on the return path side, the sliding surface between the protrusions of the guide plate becomes narrower.
Further, when the return route side guide shoe is provided at the outer end of the flight, it is necessary to arrange the projecting piece portion of the return path side guide shoe and the projecting piece portion of the guide plate so as to overlap each other in the front-rear direction. To increase the strength of the part, the outer end of the guide plate may protrude outward from the outer end of the guide shoe on the return path side.
Therefore, when the flight meanders to the left or right due to the sloshing phenomenon, there is a risk that one of them may collide with the existing equipment or pinch the return rail.
On the other hand, if the guide shoes on the return path side are aligned with the same outer end, the strength of the projecting piece portion of the guide plate cannot be increased, and there is a problem that the sloshing phenomenon cannot be sufficiently dealt with.

Japanese Unexamined Patent Publication No. 2014-161769 Japanese Patent No. 5727075

This invention was devised in view of the above circumstances, and the problem to be solved is that in a chain flight type sludge scraper, the undulation (sloshing phenomenon) of the pond surface of the settling basin during an earthquake , Chains and flights can be prevented from falling off the return route side guide rail by providing a guide plate with a simple structure on the return route side guide shoe, and the attached guide plate can be used for existing pillars, walls, and other equipment. The purpose is to provide a structure that does not come into contact or pinch the return rail.

In order to achieve the above object, the return path side guide shoe of the invention of claim 1 is
In the return route side guide shoe structure that guides the flight arranged in the chain flight type sludge scraper along the return route side guide rail.
The return path side guide shoe has a projecting piece portion that projects downward inward in the width direction of the sliding surface with respect to the return path side guide rail.
With a guide plate that is aligned with the outer end of the return path side guide shoe and is fixed so as to overlap the front and rear, and the surface of the lower end with respect to the return path side guide rail is set at the same position as the sliding surface of the return path side guide shoe or at a position separated upward. ,
It protrudes downward longer than the projecting piece at the end of the sliding surface with respect to the return-side guide rail in the lateral width direction, and is equidistant from the projecting piece via the center line of the return-side guide rail. Auxiliary protrusions are provided at the positions where the rails are
The outer end of the width of the guide plate does not protrude outward from the outer end of the width of the return route side guide shoe and is aligned at least on the same surface, and the inner end is inside beyond the inner end of the width of the return side guide shoe. It is characterized in that the width of the auxiliary projecting piece portion is set wider than the width of the projecting piece portion.

In the chain flight type sludge scraper provided with the return side guide shoe of the present invention, even if the flight is lifted by the sloshing phenomenon and the return side guide shoe is separated from the return side guide rail, it is attached to the return side guide shoe. Since the auxiliary protrusion of the guide plate is maintained in a position facing the head of the guide rail on the return route side, the auxiliary protrusion prevents the chain and flight from falling off from the guide rail without causing misalignment. be able to.
Further, the auxiliary projecting piece portion of the guide plate is formed only at the end portion where the auxiliary projecting piece portion is inside the sliding surface of the return path side guide shoe with respect to the return path side guide rail in the width direction, so that the guide plate is enlarged. There is nothing to do.
Further, since the outside of the sliding surface in the width direction with respect to the return route side guide rail has a normal shape in which only the projecting piece portion of the return route side guide shoe is provided, the arrangement is assumed in advance even if there are pillars or walls around it. There are no structural restrictions.
On the other hand, since the auxiliary projecting piece portion is arranged inside the sliding surface with the return path side guide rail, one of the return path side guide shoes provided on the left and right when the flight or the chain swings left and right. The return path side guide rail is restrained by the auxiliary projecting piece portion, and it is possible to prevent the return path side guide rail from falling off.

It is a front view which shows the state at the time of the return trip of a flight which provided the return trip side guide shoe at the end of the flight. It is a front view which shows the state at the time of the return trip of a flight which provided the return trip side guide shoe inside from the end of the flight. It is a side view of the flight. It is a front view which shows the state at the time of the return trip of a flight provided with the guide shoe on the return trip side in the case of the structure of a different guide rail. It is a front view which shows the different embodiment which provided the auxiliary protrusion piece to the guide shoe on the return path side.

An embodiment of the chain flight type sludge scraper provided with the return guide shoe of the present invention will be described below with reference to the drawings.
In each drawing, the chain is not shown for convenience of explanation, but it may be attached to a known position.

The return path side guide shoe 1 of this embodiment is used in a conventional chain flight type sludge scraper.
Although not shown, the chain flight type sludge scraper is installed in the settling basin 1 and has a drive shaft and a pair of left and right endless chains stretched along the inner side surface of the settling basin 1 in the longitudinal direction. A large number of flights 4 are attached at regular intervals while being stretched between sprocket wheels provided on the support shaft.

In this chain flight type sludge scraper, a pair of left and right guide shoes 11 are fixed to the center of the flight 4 by bolts or the like, so that the flight 4 is turned upside down and turned downward when the sludge is scraped.
On the other hand, on the pond bottom side, a pond bottom rail (not shown) is arranged at a position slidably facing the outbound guide shoe 11 when the flight 4 travels on the outbound route.

The return-side guide shoe 12 attached upward to the flight 4 during the outbound route has the flight 4 inverted and displaced downward to the flight 4 during the return route, and is displaced to the left and right ends or ends of the flight 4. The left and right guide shoes 12 are arranged in pairs on the left and right sides, and the return path side guide shoes 12 are fixed to the flight 4 with bolts B or the like.
The return route side guide rail 9 facing the outward route side guide rail separated above the outward route side guide rail is arranged at a lower position so as to be slidable by the return route side guide shoe 12 traveling on the return route. (See FIG. 1).

The lower end surface of the pair of return path side guide shoes 12 is a sliding surface 12b that slides guided by the head portion 9a of the return path side guide rail 9, and is on the outer end side of the sliding surface 12b. To prevent the return guide shoe 12 from falling off from the return guide rail 9 by protruding downward (when traveling on the outward route) and colliding with the head 9a of the return guide rail 9 when the chain or flight 4 swings. A projecting piece portion 12a to be restrained is formed.

Therefore, one of the projecting piece portions 12a of the pair of return path side guide shoes 12 can collide with the left end side of the head 9a of the left guide rail 9, and the other is the right end side of the head 9a of the right guide rail 9. It is possible to collide with the flight 4 and prevent the chain from falling off.
Similarly, the outward guide shoe 11 is also formed with the projecting piece portion 11a at the same position.

In this embodiment, since the return path side guide shoe 12 uses the same member as the outward path side guide shoe 11 as in the conventional case, the projecting piece portion 11a and the projecting piece portion 12a have the same protruding length. , The protrusion length is suppressed and set low so as not to interfere with sliding.

However, since the return path side guide shoe 12 needs to deal with the sloshing phenomenon caused by a large earthquake in advance, in this embodiment, the guide plate 13 is mounted on the return path side guide shoe 12 (FIG. 1, FIG. (See FIG. 3).
The guide plate 13 is aligned at the same position so as not to exceed the outer end of the return path side guide shoe 12 further outward.
Then, at the inner end of the guide plate 13 (closer to the center of the flight 4), an auxiliary protrusion 14 having a higher strength and protruding longer than the projecting piece portion 12a is provided.

Here, in the auxiliary projecting piece portion 14, the distance in the lateral width direction from the center line C of the head portion 9a of the return path side guide rail 9 is from the projecting piece portion 12a of the return path side guide shoe 12 to the center line C of the head portion 9a. It is set to be equal to the distance in the width direction of the above, and although a part of the sliding surface 12b is blocked by the auxiliary projecting piece portion 14, it is possible to slide with a width substantially the same as before. Is set to.

Therefore, the outer ends of the width of each guide plate 13 are aligned at least on the same surface so as not to protrude outward from the outer end of the width of the return guide shoe 12, and the inner end is the width of the return guide shoe 12. Since it extends inward beyond the inner end of the auxiliary projecting piece portion 14, the width of the auxiliary projecting piece portion 14 can be widened to increase the strength.

As a result, the end of the guide plate 13 does not protrude outward beyond the return guide shoe 12, so that when the outer end of the return guide shoe 12 coincides with the outer end of the flight 4, the scraper There is no possibility that the guide plate 13 will collide with pillars or structures installed outside the above with a slight gap, and the guide plate 13 can be attached to the existing scraper.

Further, in the present embodiment, the lower end portion 13b of the guide plate 13 excluding the auxiliary projecting piece portion 14 is positioned above the sliding surface 12b of the return path side guide shoe 12 and is separated from the head portion 9a of the return path side guide rail 9. Since there is no contact, the contact area during sliding does not increase.

In the illustrated example, the auxiliary projecting piece portion 14 is separated from the adjacent end portion (inner end) of the head portion 9a by 34 mm in the lateral width direction L1, which is the projecting piece portion 14a of the return path side guide shoe 12 and the head portion 9a. It has the same length as the width direction with the adjacent end (outer end) of the guide plate 13 (the width of the guide plate 13 is 125 mm, which is set slightly wider inward than the guide shoe 12 on the return path side).
Further, the vertical length L2 between the upper end of the bolt 9b for fixing the return guide rail 9 and the auxiliary projecting piece portion 14 is shorter than that of the projecting piece portion 12a, but the distance is 10 mm, which is the same as the margin dimension at the time of wear due to long-term use. Because it is, there is no problem.

FIG. 1 shows a case where the outer end of the return route side guide rail 9 is arranged so as to be aligned with the outer end of the flight 4, but the same applies to the case where the return route side guide rail 9 is arranged closer to the inside than the outer end. Therefore, the same components are designated by the same reference numerals, and the description thereof will be omitted (see FIGS. 2 and 3).

In the first and second embodiments, since the existing flight 4 can be installed without changing the maximum width, it is possible to prevent new contact with existing brackets, columns, walls, and the like.
Further, when the flight 4 meanders, since the auxiliary projecting piece portion 14 of the guide plate 13 is installed only inside the flight 4, the auxiliary projecting piece portion 14 does not pinch the guide rail 9 on the return route side, and more. Effective sloshing measures can be realized.

The guide plate 13 of the third embodiment shown in FIG. 4 has the same structure as that of the first embodiment.
In this case, the case where the return route side guide rail 9 uses the guide rail structure in the rail fixing structure of the sludge scraper according to Japanese Patent Application Laid-Open No. 2014-24038 which the applicant has already applied for is shown.

Here, the sliding surface of the return path side guide shoe 12 corresponding to the head portion 9a of the return path side guide rail 9 of the above embodiment is the horizontal piece 22 that is bent at a substantially right angle at the upper end of the substantially vertical standing piece 21. It becomes.
Here, the center line C'of the horizontal piece 22 corresponds to the center line C of the head 9a, L1 is 29 mm, and L2 is 17 mm. In this case as well, effective sloshing measures are taken according to the above embodiment. It can be realized.

The fourth embodiment shown in FIG. 5 has a configuration in which the guide plate of the above embodiment is not provided and the auxiliary projecting piece portion 14 is directly provided on the return path side guide shoe 12.
In this case, at least on the return path side guide shoe 12, a projecting piece portion 12a is formed on the outer end side of the sliding surface, and an auxiliary projecting piece portion 14'is integrally formed on the inner end side.
Since other configurations are the same as those in each of the above-described embodiments, the same configurations are designated by the same reference numerals and the description thereof will be omitted.

The present invention is not limited to each of the above embodiments, and in short, various design changes can be made without changing the gist of the present invention.

1 Settling basin 2 Chain 4 Flight 9 Return route side guide rail 9a Head 11 Outward route side guide shoe 11a Projection piece 12 Return route side guide shoe 12a Projection piece 13 Guide plate 14 Auxiliary protrusion (integrated with the guide plate)
14'Auxiliary protrusion (integrated with the guide shoe on the return route))

Claims (1)

In the return route side guide shoe structure that guides the flight arranged in the chain flight type sludge scraper along the return route side guide rail.
The return path side guide shoe has a projecting piece portion that projects downward inward in the width direction of the sliding surface with respect to the return path side guide rail.
With a guide plate that is aligned with the outer end of the return path side guide shoe and is fixed so as to overlap the front and rear, and the surface of the lower end with respect to the return path side guide rail is set at the same position as the sliding surface of the return path side guide shoe or at a position separated upward. ,
It protrudes downward longer than the projecting piece at the end of the sliding surface with respect to the return-side guide rail in the lateral width direction, and is equidistant from the projecting piece via the center line of the return-side guide rail. Auxiliary protrusions are provided at the positions where the rails are
The outer end of the width of the guide plate does not protrude outward from the outer end of the width of the return route side guide shoe and is aligned at least on the same surface, and the inner end is inside beyond the inner end of the width of the return side guide shoe. The return path side guide shoe structure is characterized in that the width of the auxiliary projecting piece portion is set wider than the width of the projecting piece portion.

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