JPH1060863A - Dust cleaner with multi-stage expansion arm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the length of an expansion arm from being expended by providing a slide shoe on an inner surface of the bottom of a fixed arm, a guide roller in front of the upper end of a lower stage arm and a slide shoe on the rear surface. SOLUTION: A telescopic expansion arm comprising a fixed arm 4, an intermediate arm 5 and a lower stage arm 6 is provided on a dust cleaner 1. A rake 7 is provided on the lower stage arm 6. The rake 7 is laid out on the upstream side of a bar screen slantingly provided on a water current. A slide shoe 2 is provided on the inner surface of the lower part of the fixed arm 4 while a guide roller 26 is provided in front of the lower end of the lower stage arm 6 and a slide shoe 28 is provided on the rear surface. When dust and dirt are caught with the bar screen and scraped up with the rake 7 by extending the expansion arm, a maximum pressure during the extension of the arm is received with a guide roller 26. Even if a large reaction force is inflicted, it is turned into a rolling friction, thereby minimizing the resistant value and minimizing the spacing of a guide support member. It is, therefore, possible to shorten the length of the arm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust remover with a multi-stage telescopic arm.

[0002]

2. Description of the Related Art In general, one of the operations for removing coarse suspended matters in water is screening. When this screening device is classified, it can be classified into a screen having a fixed screen surface and a movable screen. It is roughly divided into what became.

[0003] One of the fixed type screens is a bar screen. The screen is formed by arranging flat steels at regular intervals vertically and forming them in a lattice. The dust (sieve residue) captured by the eyes is continuously or intermittently scraped up.

[0004] In this intermittent automatic dust-removing type bar screen, the rake which lifts up the captured dust is raised and lowered by a multi-stage telescopic arm (also referred to as telescopic boom).

[0005] In particular, this multi-stage telescopic arm is fitted with a plurality of box-shaped arms having a cross section in a telescopic shape (also referred to as a monocoque boom shape having a stress outer skin structure) so as to be freely detachable. Make up. Conventionally, each arm is guided at the time of expansion and contraction via a roller.

However, in this roller type expansion / contraction arm, the mounting structure of the roller is complicated, and if the surface pressure of the roller is to be reduced, the roller diameter must be increased. Therefore, there is a problem that the cross section of each arm itself becomes large, and consequently the telescopic arm becomes large.

[0007] This problem has an effect on the intermittent dust-removing bar screen, because the purpose of the intermittent dust-removing bar screen is to simplify the system compared to the continuous dust-removing bar screen. large.

For this purpose, a guide rail is provided on the entire length of the outer surface of each telescopic arm in the longitudinal direction, and a slider (also referred to as a slide shoe) sliding on the guide rail is provided on the inner surface of each telescopic arm. A fixed shoe type telescopic arm has been developed (see, for example, Japanese Utility Model Publication No. 57-43941). The slider is provided at two locations, upper and lower, in each telescopic arm.

[0009]

However, such a dust-type dust remover with a telescopic arm of the shoe type has the following problems.

That is, assuming that the telescopic arm comprises, for example, a fixed arm, an intermediate arm and a lower arm, each arm of the intermediate arm and the lower arm is provided. Are two-point upper and lower supports of a main shoe for pivoting at the time of expansion and contraction and a secondary shoe for merely supporting at the time of expansion and contraction, and the distance between these slides is wide. As the surface pressure of the secondary shoe decreases,
Although the backlash due to the clearance is reduced, if the supporting interval is widened in this way, each arm needs to have a long length, and the telescopic arm including the fixed arm, the intermediate arm and the lower arm is used. -It is uneconomical for

Also, with regard to the attachment of the slide shoe, the slide shoe attached to the back of the inside of the ceiling with which each arm fits is to be attached in a narrow place within a box-shaped section. It is also difficult to adjust the clearance by the thickness of the liner material attached to the back of the shoe.

[0012] It should be noted that the above-mentioned applicant has presented a Japanese publication No. 5
The slide shoe described in Japanese Patent Publication No.
Since the shoe mounting hole is opened in the arm and a shoe mounting bracket provided with a slide shoe from the shoe mounting hole is mounted on the inner surface of the outer fitting arm, the strength of the arm is reduced. There was a risk of doing so.

The present invention has been made to solve the above problems.

[0014]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a lower arm of a telescopic arm for catching dust caught by a bar screen inclined in a water channel. In a dust remover that is lifted up by a rake provided on the arm, the telescopic arm is telescopically formed by at least a lower arm having a box-shaped cross section and a fixed arm having a box-shaped cross section provided on a waterway.
The fixed arm is provided with a slide shoe on the lower inner surface of the fixed arm to serve as one guide support member, and a guide roller is provided in front of the upper end of the lower arm. A multistage telescopic arm-equipped dust remover is characterized in that a slide shoe is provided on the rear surface of the upper end portion to serve as the other guide support member.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

FIG. 1 is an overall view of an embodiment of the present invention, FIG. 2 is an explanatory view of the operation of FIG. 1, FIG. 3 is a cross-sectional view of FIG. FIG.

The multistage telescopic dust remover 1 of the present embodiment is conveniently installed in, for example, a sand basin, an agricultural waterway, an intake channel of a power plant, and the like.

First, an outline of the dust remover 1 with a telescopic arm will be described.

In FIG. 1, a dust remover 1 with a telescopic arm is shown.
Is installed in the culvert channel 2, and its telescopic arm 3 is
A fixed arm 4 provided above the water channel 2, an intermediate arm 5 below the fixed arm 4, and a lower arm 6 further below the fixed arm 4 are formed in a telescopic shape (also referred to as a monocoque beam shape, indicating a stressed skin structure).
It is configured to be fitted to.

At the lower end of the lower arm 6, a rake 7 serving as a dust scraper is provided. This rake 7
The bar screen 8 is disposed on the upstream side of the bar screen 8 provided at an inclination in the water channel 2, and a bar 9 is connected to the upper end of the bar screen 8. Dust captured in 1
0 is raked up by a rake 7 and dropped from the shot 9 onto a discharge conveyor (not shown).

The fixed arm 4 of the telescopic arm 3 is attached to a machine frame 11 (or a movable carriage) via a pivot 12 so as to be tiltable, and a pivot 12 of the fixed arm 4 is provided.
A tilting cylinder 13 is provided above the machine frame 11.

Next, the operation of the telescopic arm dust remover 1 will be described.

When the dust 10 is caught by the bar screen 8 or when the time set by the timer is reached, the rake 7 descends, but the tilting cylinder 13 contracts immediately before the rake. Therefore, the telescopic arm 3 rotates about the pivot 12 and the rake 7 separates from the bar screen 8. In this state, the telescopic arm 3 is extended to lower the rake 7.

Next, when the rake 7 comes to the lower limit position in the underwater part, the tilting cylinder 13 is extended and the rake 7 is fitted to the surface of the bar screen 8, especially between the grids. Let it.

Next, the telescopic arm 3 is shortened so as to raise the rake 7 along the bar screen 8.

The above-described dust remover 1 with a telescopic arm has the basic structure of a general multi-stage dust extractor with a telescopic arm. The telescopic arm is formed by forming a telescopic shape by forming a box-shaped cross section.
Is expanded and contracted by a chain 14. Of course, it may be performed by a rope.

The expansion and contraction operation will be described.

The intermediate arm 5 is fitted in the fixed arm 4 having a rectangular box shape with a ceiling section, and the lower arm 6 is fitted in the intermediate arm 5. -The telescopic mechanism is configured to be stretchable.

A drive sprocket 15 is provided on the upper part of the fixed arm 4 and a chain 14 is hung thereon. One end of the drive sprocket 15 is directly fixed to the first fixed part 16 above the lower arm 6. I do.

The other end is fixed to the second fixing portion 21 of the upper bracket of the lower arm 6 via guide sprockets 17, 18, 19, and 20 described later.

Accordingly, the structure is such that the lower arm 6 is interposed in the middle of the stepless chain 14.

In these guide sprockets, 17 is on the shoulder of the fixed arm 4 and 18 is the fixed arm 4
, 19 is provided on the shoulder of the intermediate arm 5 and 20 is provided on the skirt of the intermediate arm 5 so as to be rotatable.

Therefore, when the driving sprocket 15 is rotated left and right (forward / reverse rotation) in the drawing, the intermediate arm 5 and the lower arm 6 are driven by the chain 14 to move the chain on the supply side to the driving sprocket 15. -Forcibly expands and contracts with the tensile force of-.

That is, by rotating the driving sprocket 15 clockwise (clockwise), the intermediate arm 5 and the lower arm 6 are rotated.
Elongates and descends, and shortens and ascends by turning left (counterclockwise). Therefore, the chain 14 does not extend, and does not require a take-up device or the like used for the rope, and can operate reliably.

Here, in order to facilitate the adjustment of the gap of the telescopic arm 3 and the replacement of the slide shoe, etc., and to reduce the surface pressure and the resistance during the telescopic operation of each of the arms 4, 5, and 6. The telescopic arm 3 was constructed as follows.

That is, in FIGS. 2A and 2B, the intermediate arm 5 is supported by a first lower slide shoe 22 fixed to the fixed arm 4, and the lower arm 6 is It is supported by a second lower slide shoe 23 fixed to the intermediate arm 5.

The first and second lower slides (hereinafter simply referred to as slides) 2
As shown in FIG. 3, reference numerals 2 and 23 denote corner inner surfaces 24 and 24 of the fixed arm 4 and the intermediate arm 5 which are formed in a rectangular box cross section.
A pair of intermediate arms 5 mounted and supported orthogonally to
And outer corners 25 of the lower arm 6 made of rails,
It holds 25 ... and surrounds all four corners.

The first and second lower slides 22 and 23 can be said to be main guide and support members that perform a pivot action, and since they are lower portions, their replacement and clearance adjustment are facilitated.

In FIGS. 2A and 2B, the cross section 4
A guide roller device (referred to as the upstream side of the bar screen 8; hereinafter the same) at the upper end of each of the middle arm 5 and the lower arm 6 formed in the square box is provided. In this specification, guide roller units 26 and 27 are provided, and these guide roller units 26 and 2 are provided at the upper end portions of the intermediate arm 5 and the lower arm 6, respectively.
On the opposite surface, that is, on the rear surface of the plate 7, a plate-shaped sliding shoe material (also referred to simply as a sliding shoe in this specification).
28 and 29 are fixed.

Therefore, the intermediate arm 5 and the lower arm
The front and rear surfaces of each upper end of the arm 6 are guided by guide roller devices 26 and 27 and sliding shoes 28 and 29, respectively, to the front of the fixed arm 4 and the intermediate arm 5 which are externally fitted. It is supported on the back inside.

Therefore, these guide roller devices 2
6, 27 and the sliding shoes 28, 29 can be referred to as auxiliary guide supporting members which merely perform a supporting action.

If the guide sprockets 17, 18, 19, 20 are attached as described above, a large fulcrum reaction force when the telescopic arm 3 extends is received by the guide roller devices 26, 27. That is, the resistance value at the time of extension is reduced by the rolling friction caused by the rollers.

Only when the telescopic arm 3 is shortened,
A small reaction force is generated on the rear surface at the upper ends of the beams 5 and 6, and this small reaction force is supported by the sliding shoes 28 and 29.

Next, these guide roller devices 26, 2
7 and the sliding shoe members 28 and 29 will be described in further detail.

In order to roll the guide roller devices 26 and 27 on the front inner surface of the fixed arm 4 having an externally fitted ceiling and the intermediate arm 5, as shown in FIG. A front space 30 is formed between the middle arm 5 and a front space 31 is formed between the middle arm 5 and the lower arm 6.

In the front space 31, as shown in FIG. 4, the guide roller device 27 is sandwiched between a bracket 32 having a U-shape in a plan view and standing upright on the ceiling of the lower arm 6. A roller bearing member 33 that moves in the front-rear direction, a roller shaft 34 fixed to the roller bearing member 33, and a roller with a collar rotatably supported by the roller shaft 34. And a bolt nut 36 for adjusting the roller bearing member 33 to move back and forth.

The rollers 35 with the collar are provided with an intermediate arm 5.
The rail 37 provided on the front inner surface in the longitudinal direction is rolled.

The clearance in the front space 31 can be adjusted by screwing and adjusting the bolt and nut 36.

A sliding shoe 29 is provided on the rear surface opposite to the guide roller device 27. Since the sliding shoe 29 is fixed via a liner plate 38, By changing the thickness of the liner plate 38, the gap in the front space 31 can be adjusted.

Reference numeral 39 denotes a rail provided on the front inner surface of the fixed arm 4 in the longitudinal direction, and reference numerals 40, 40 denote space frames for forming the front spaces 30, 31, and these space frames. Each of the corner inner surfaces 24 is formed by a part of the cam 40, and one of the lower slides 22 and 23 is fixed thereto. Therefore, the cross section of each arm is larger than that of the shoe type by only one space 40 on one side.

Note that the telescopic arm 3 of this embodiment is
Although the fixed arm 4, the intermediate arm 5, and the lower arm 6 are provided, the present invention is not limited to this, and may be a two-stage or four-stage telescopic arm.

[0052]

According to the present invention, a slide shoe is provided on the lower inner surface of the fixed arm, a guide roller is provided in front of the upper end of the lower arm, and a slide shoe is provided on the rear surface.
The following beneficial effects can be obtained.

Since the guide roller is provided only on the front side and the slide surface is provided on the rear surface, a box-shaped arm can reduce the cross section.

Since the guide roller receives the maximum reaction force at the time of arm extension, even if there is a large reaction force, the resistance value as rolling friction can be reduced, and the distance between the guide support members can be reduced. . As a result, the length of the arm can be reduced.

A slide shoe is provided on the lower inner surface of the fixed arm.
Is provided, replacement and clearance adjustment can be easily performed.

A mixture of the roller type and the shoe type can be conveniently embodied.

[Brief description of the drawings]

FIG. 1 is an overall view of an embodiment of the present invention.

FIG. 2 is an operation explanatory view of FIG. 1;

FIG. 3 is a sectional view taken along the arrow B in FIG. 2 (A).

FIG. 4 is a sectional view taken along line A to arrow in FIG.

[Explanation of symbols]

1 ... dust remover with telescopic arm, 2 ... water channel, 3 ... telescopic arm,
4: fixed arm, 6: lower arm, 7: rake, 2
2, 23 ... lower slide shoe, 26, 27 ... guide roller device, 28, 29 ... slide shoe material

Claims (1)

[Claims] 1. A lane provided on a lower arm of a telescopic arm for catching dust caught by a bar screen provided at an inclination in a water channel.
In a dust remover that is scraped up by a key, the telescopic arm is configured to be telescopically fitted with at least a box-shaped lower arm in section and a box-shaped fixed arm provided on a water channel, A slide shoe is provided on the lower inner surface of the fixed arm to serve as one guide support member, and a guide roller is provided in front of the upper end of the lower arm and a slide shoe is provided on the rear surface of the upper end. A dust remover with a multi-stage telescopic arm, wherein the dust support is provided as the other guide support member.