JPH10237848A - Screen bar and dust removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide sufficient strength and improve the assembling precision and working efficiency by integrating a connecting part protruded to the rear surface side with a lengthy bar body in the longitudinal direction of the bar body, and forming overhang parts on both lateral sides of the connecting part. SOLUTION: The work of mutually superposing overhang parts 34a, 34b of juxtaposed adjacent screen bars 30 and screwing them by a bolt 42 is performed in a plurality of connecting parts 34 in the longitudinal direction to mutually connect the bars 30, and this is successively repeated, whereby a bar screen 12 is formed. The bar screen 12 is connected to a screen beam 24, and the end surfaces of the overhang parts 34a, 34b of the screen bars 30 are brought into contact with the side surface of each connecting part 34, 34 of the other bar 30, respectively. The pitch (p) of the bars 30, 30 can be made constant by the easy positioning of the screen bars 30, and the bar screen 12 is made of a resin to provide a sufficient strength. Further, the bar screen 12 is fixed to the screen beam 24 through the arm part 32b of each screen bar 30. Thus, the interference of the bar screen 12 with a rake is prevented, and scraping property can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust remover for removing dirt in waterways by a bar screen and a screen bar used for the same.

[0002]

2. Description of the Related Art Conventionally, there has been known a dust removing device for mechanically removing dust and coarse solids caught by a bar screen provided in a water channel such as a service water or a drainage channel. FIG. 5 is a perspective view showing the entire configuration of the dust removing device.
Avant-garde screen 11 (bar screen) and main screen 12 (bar screen) provided across the width of waterway W, screen beam 24 supporting main screen 12,
A pair of left and right side frames 25 for supporting both ends of the screen beam 24, a plurality of rows of rakes 13 for scraping up dust along the avant-garde screen 11 and the main screen 12, and a traveling path of the plurality of rows of rakes 13. A lower guide plate 20, an upper guide plate 21, and a pair of left and right endless rake chains 14 for supporting both ends of the rakes 13 in a plurality of rows are provided.

[0003] A pair of endless rake chains 14
A pair of sprockets 16 fixed to both ends of the drive shaft 15
Is engaged. A sprocket 17 adjacent to one sprocket 16 and fixed to the drive shaft 15 is motively connected via a drive chain 18 to a drive device 19 composed of a speed reducer and a motor. And the driving device 19
Is driven, the drive shaft 15 is driven to rotate, the pair of endless rake chains 14 and 14 are run, and the dust caught by the screens 11 and 12 is scraped up by the rake 13.

A lower guide plate 20 and an upper guide plate 21 which is continuous at an angle with respect to the lower guide plate 20 are provided along the movement trajectory of the rake 13. The scraped-up garbage is in the lower guide plate 2
0 and the upper guide plate 21. A hopper 22 is provided below the upper end of the upper guide plate 21, and a garbage carry-out conveyor 23 is provided below the hopper 22. The scraped-up dust is carried out to the outside.

FIG. 6 shows a main screen (bar screen).
12 is a diagram showing a detailed structure of FIG. 12, FIG.
FIG. 6B is a side view. As is clear from FIG.
The main screen 12 is made of a steel material, and a large number of screen bars 12a extending in a plate-like and elongated shape are arranged side by side at a predetermined pitch in a horizontal direction, and are welded to a horizontal bar 12b made of a steel material arranged on the rear side. It is constituted by fixing by. The main screen 12 is mounted on the screen beam 24 and disposed inside the dust removing device A as described above.

When the bar screen 12 is made of a resin material as shown in FIG.
2a, a through hole 12c is formed at a predetermined position, and a hollow spacer 1 is provided between each screen bar 12a.
The bar screen 12 is also formed by inserting a 2d and passing a bolt 12e alternately penetrating the inside of the through hole 12c and the spacer 12d, and then tightening both ends of the bolt 12e with nuts 12f.

[0007]

However, the bar screen 12 shown in FIG. 6 can be applied only to a material which can be welded and has sufficient rigidity.
It was unable to respond to the demand for a resin that was lightweight and had excellent corrosion resistance. In addition, when the screen bars 12a are arranged side by side at a predetermined pitch in a horizontal direction, a special jig is required to perform this positioning, and this operation is considerably troublesome.

In the latter case, the screen bar 1
Since the through-hole 12c is provided at a predetermined position inside the 2a, not only the strength of the screen bar 12a is reduced, but also the spacer 12
There is a problem that the spacer 12d may be an obstacle when the rake 13 is used to scrape up the dirt.

The present invention has been made in view of the above-mentioned circumstances, and provides a screen bar and a dust removing device that can make use of the advantages of a resin material, and that can achieve sufficient strength, assembling accuracy and work efficiency. The purpose is to:

[0010]

According to the first aspect of the present invention, an elongated bar main body and a connecting portion projecting rearward at a predetermined position in the longitudinal direction of the bar main body are integrally formed. A screen bar characterized in that a projecting portion projecting from both sides in the lateral direction is formed in the connecting portion.

According to the present invention having such a configuration, the screen bars are positioned via the projecting portions of the connecting portions of the screen bars, and are bolted to each other or to the screen beams, thereby impairing the strength of the screen bar. Without connecting screen bars, a bar screen can be formed. Also, by taking the front and rear widths of the screen bar sufficiently, the distance between the rake and the overhang that runs on the entire surface is set sufficiently to prevent mutual interference,
The scraping property can be improved.

[0012] In the invention described in claim 2, the overhanging portion is
2. The screen bar according to claim 1, wherein the projecting portions of adjacent screen bars are formed so as to overlap each other. As a result, the overhangs can be directly connected by bolts or the like in a state where the overhangs are overlapped, and the ease of assembly and the structural strength can be improved.

According to a third aspect of the present invention, the overhang portion is formed with a bolt hole for bolting the overhang portions of the adjacent screen bars to each other. Screen bar.

According to a fourth aspect of the present invention, there is provided the screen bar according to the first aspect, wherein a bolt hole for connecting the screen bar to a screen beam is formed in the connecting portion.

According to a fifth aspect of the present invention, there is provided the screen bar according to any one of the first to fourth aspects, wherein the screen bar is formed of a resin molded product. By forming with such a resin, advantages such as corrosion resistance, low noise, and low vibration can be fully utilized, and the molding operation can be easily performed.

[0016] The invention according to claim 6 is the invention according to claims 1 to 5.
And a rake that runs along the bar screen and rakes up debris locked to the bar screen. It is a dust removing device.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a main screen (bar screen) 12 according to a first embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. The bar screen 12 is formed by forming a screen bar 30 having the same shape extending in the longitudinal direction with a resin in advance and sequentially connecting the screen bars 30 in the lateral direction. Each screen bar 30 is formed integrally with a bar body 32 extending in the longitudinal direction and a connecting portion 34 projecting rearward (downward in FIG. 1) at a predetermined position in the longitudinal direction of the bar body 32. Bar body 32
Has a head 32a having a substantially circular cross section,
The arm portion 32b has a rectangular cross section extending rearward from the arm and a tapered portion 32c extending rearward.

These parts are integrally formed by a molding method in which dicyclopentadiene (DCPD) is injected into a mold as a main raw material. That is, tricyclic norbornene monomers such as dicyclopentadiene and hydrodicyclopentadiene, tetracyclic norbornene monomers such as tetracyclododecene, and pentacyclic norbornene monomers such as tricyclopentadiene;
A heptacyclic norbornene-based monomer such as tetracyclopentadiene or the like, or two or more of these alkyl-substituted or alkylidene-substituted monomers are used as a liquid raw material containing dicyclopetadiene as a main raw material. The above liquid material is introduced into a mixing chamber, mixed, and injected into a cavity of a molding die, thereby forming a screen bar 30.
Is formed. These ingredients have a high degree of chemical activity and polymerize and solidify in the mold to form a resilient or rigid polymer.

The connecting portion 34 of each screen bar 30 includes
Overhang portions 34a having the same thickness and the same width projecting in the lateral direction at different positions in the front-rear direction (vertical direction in FIG. 1).
34b are provided. These are formed in such a size and position that the overhang portions 34a and 34b of the adjacent screen bar 30 overlap each other. Each overhang 34
bolt holes 36a, 36b at corresponding positions of
Is provided, and a bolt 38 is screwed to this. At the opening end of the bolt hole 36b on the back surface of the overhang portion 34b, a concave portion 36c for accommodating the head of the bolt 38 is provided.

The connection portion 34 of a specific one of the screen bars 30 constituting the bar screen 12 is formed with a bolt hole 40a opened on the back side, and the bolt hole 40a formed in the screen beam 24 at an appropriate interval. A bolt 42 that passes through the hole 40b is screwed. Thereby, the bar screen 12 is connected to the screen beam 24 and is incorporated in the dust removing device. Such a screen beam 2
The screen bars 30 connected to 4 are set to be arranged at appropriate intervals in consideration of the connection strength.

When assembling the dust removing apparatus constructed as described above, as shown in FIG.
Are arranged in parallel, and the bolts 42 are screwed together by overlapping the front projections 34a and the rear projections 34b of the adjacent screen bars 30 with each other. This is performed by a plurality of connecting portions 34 in the length direction, and the adjacent screen bars 30 are connected to each other.
And The connection to the screen beam 24 is achieved by connecting a bar screen having bolt holes 43 set at every third
4, the steps may be performed sequentially, or may be performed after the bar screen is assembled.

Here, one screen bar 30
The end surface of the overhang portion 34a of the other screen bar 30 corresponds to the side surface of the connection portion 34 of the other screen bar 30, and the end surface of the overhang portion 34b of the other screen bar 30 corresponds to the side surface of the connection portion 34 of the one screen bar 30. Touch, both screen bar 3
Positioning of 0 and 30 is performed. Accordingly, the screen bar 30 can be easily and quickly positioned without using any special jig, and the pitch p of the screen bars 30, 30 can be made constant.

In the dust removing apparatus using the bar screen 12 having such a configuration, the bar screen 12 is made of resin, so that effects such as corrosion resistance, light weight, low noise and low vibration can be obtained, and Due to the tight connection between the screen bars 30, a sufficient structural strength can be obtained.
In addition, since each screen bar 30 is provided with the arm 32b and fixed to the screen beam 24 via the arm 32b, the interference between the bar screen 12 and the rake 13 (see FIG. 5) is prevented, and the screen bar 30 is scraped off. Performance can be improved.

The connecting portion 34 of the screen bar 30 is provided with bolt holes 36a and 36b.
Since this is a portion different from the bar main body 32, the strength of the bar screen 12 does not decrease even if the bolt holes are provided. This is the same in the case of the bolt hole 40a for connection with the screen beam 24. In addition, since the concave portion 36c is provided on the back surface of the overhang portion 34b, the head of the bolt 38 connecting the screen bars 30, 30 does not protrude, and the attachment to the screen beam 24 is performed smoothly. Done.

FIG. 4 shows a second embodiment of the present invention. This embodiment is different from the first embodiment in that the screen bars 50 are not connected to each other, 50 is connected to the screen beam 24 by bolts. That is, this screen bar 50
From the connecting portion 54 from the same position in the front-rear direction.
4a and 54b project right and left.

Accordingly, to assemble the bar screen 12, the screen bars 50 are sequentially arranged on the screen beam 24, and the bolts 62 are inserted through the bolt holes 60b and screwed into the bolt holes 60a. This is performed by a plurality of connecting portions 54 in the length direction, and the other screen bars 50 are sequentially arranged and attached, whereby the bar screen 12 is configured. Also in this example, it goes without saying that the same effects as those of the previous embodiment can be obtained.

[0027]

As described above, according to the present invention, a bar screen can be formed and disposed inside a dust remover without welding, whereby, for example, dicyclopentadiene is used as a main raw material. The bar screen is composed of a screen bar made of resin molded product, while taking advantage of the corrosion resistance, light weight, low noise, low vibration, etc. of the resin material,
It is possible to provide a bar screen which has sufficient strength in a simple process and has good scraping properties while preventing interference with a rake or the like.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a bar screen (main screen) used in a dust removal apparatus according to a first embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a perspective view showing an assembling process of the embodiment of FIG. 1;

FIG. 4 is a sectional view showing a bar screen (main screen) according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing the entire configuration of the dust removing device.

FIG. 6 is a diagram showing a main screen in a conventional dust removing device.

FIG. 7 is a view showing another main screen in the conventional dust removing apparatus.

[Explanation of symbols]

 11 Avant-garde screen 12 Main screen 13 Rake 20,21 Guide plate 24 Screen beam 30,50 Screen bar 32,52 Bar body 32a, 52a Arm part 34,54 Connecting part 34a, 34b, 54a, 54b Overhang part 38,42, 62 volts

Claims (6)

[Claims] An elongated bar main body and a connecting portion projecting rearward at a predetermined position in the longitudinal direction of the bar main body are integrally formed, and the connecting portion has a projecting portion projecting to both sides in a lateral direction. A screen bar, characterized by having a pattern formed thereon. 2. The screen bar according to claim 1, wherein the overhang is formed so that the overhangs of adjacent screen bars overlap each other. 3. The screen bar according to claim 2, wherein a bolt hole is formed in the overhang portion for bolting the overhang portions of adjacent screen bars. 4. The screen bar according to claim 1, wherein the connection portion has a bolt hole for connecting the screen bar to a screen beam. 5. The screen bar according to claim 1, wherein the screen bar is formed of a resin molded product. 6. A bar screen obtained by assembling the screen bar according to any one of claims 1 to 5 in a laterally adjacent manner, and garbage traveling along the bar screen and locked by the bar screen. A dust removing device comprising a rake for scraping.