JP2003227122A - Multistage arm telescopically driving dust remover by using single-row roller chain - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multistage arm telescopically driving dust remover by using a single-row roller chain, which is compact and small in size and light in weight. <P>SOLUTION: The multistage arm telescopically driving dust remover by using the single-row roller chain is formed of a multistage arm telescopic mechanism 1, an arm opening/closing mechanism 5, and a holding mechanism 4. The multistage arm telescopic mechanism 1 has a rake 2 attached to a lower end of a front-end arm 1a, and has a telescopic structure using the single-row roller chain 9. The single-row roller chain 9 is connected to an upper end of the front- end arm, and has a reverse bending preventive function. The arm opening/ closing mechanism 5 can open an arm central shaft of the telescopic mechanism from a vertical shaft to a predetermined angle. The holding mechanism 4 holds these mechanisms. The multistage arm telescopically driving dust remover comprises square pipe-shaped housing arm 1d which telescopically houses therein the front-end arm and square pipe-shaped multistage arms which are slidably serially connected to each other by slide holding means 8. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a single-row roller chain to make it compact, small, and lightweight, and to scoop up and remove dust trapped on the screen bar. Regarding the machine.

[0002]

2. Description of the Related Art There are various types of prior art dust removers. For example, in Japanese Patent Laid-Open No. 2000-144690 "Dust remover", a telescopic mechanism for extending and retracting a multi-stage arm is arranged along both sides of the multi-stage arm. , There is a dust remover provided with one rope connected to each other, and the dust remover has a dust scraping mechanism, and the dust scraping mechanism is driven by a drive motor.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
JP-A-2000-144690, "Dust remover" paragraph (002
As described in 7), the telescopic mechanism is a rope type in which the wire rope is extended by unwinding it from a pair of winding drums and contracted by winding it up. It is difficult to overcome a failure such as clogging of the multi-stage arm because it depends only on, and it is difficult to equip a horizontal movement mechanism that moves the rake to a predetermined position because it becomes large and complicated. ，
There was a problem.

In the conventional dust remover, as described in the paragraph (0040) of the above "Dust remover", since the dust scraping mechanism is driven by the drive motor, it requires a power source and the mechanism becomes complicated. There was a problem that maintenance was difficult.

[0005]

In order to solve the above-mentioned problems, a multistage arm telescopic drive type dust remover using a single row roller chain according to claim 1 of the present invention is provided with a rake at the lower end of the tip arm. , A multi-stage arm extension / contraction mechanism having a structure in which it is extendable / contractible using a single row roller chain having a reverse bending preventing function, which is connected to the upper end of the tip arm,
The multi-stage arm expansion / contraction mechanism is characterized by comprising an arm opening / closing mechanism capable of opening / closing the arm central axis at a predetermined angle from the vertical axis, and a holding mechanism for holding these mechanisms.

A multi-stage arm telescopic drive type dust remover using a single-row roller chain according to claim 2 of the present invention is equipped with a scraping means having a function of scraping off by a mechanical self-weight effect in the vicinity of the upper part of the multi-stage arm telescopic mechanism. It is characterized by doing.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A multi-stage arm telescopic drive type dust remover using a single-row roller chain according to claim 1 of the present invention is provided with a rake at the lower end of the tip arm and is connected to the upper end of the tip arm in a reverse bend. A multi-stage arm extending / contracting mechanism having an expandable / contractible structure using a single-row roller chain having a prevention function, an arm opening / closing mechanism capable of opening / closing the arm central axis of the multi-stage arm extending / contracting mechanism at a predetermined angle from a vertical axis,
A multistage arm telescopic drive type dust remover comprising a holding mechanism for holding these mechanisms, wherein the multistage arm telescopic mechanism is a first arm which is slidably connected in series using the tip arm and a slide holding means. And a square pipe-shaped multi-stage arm composed of a second arm and a square pipe-shaped storage arm for retractably storing the other end of a single row of the roller chain having one end locked at the upper end of the tip arm. Chain storage means for guiding and storing the parts in a hierarchical manner from the opening of the storage arm through the inside of the multi-stage arm through a gear driven by a chain drive means such as an electric motor. Is formed on the outer side of the chain storage means,
A semi-circular guide plate is attached so that the roller chain can be guided and stored in a hierarchical manner, and the rake can be installed along the vertical direction of the screen bar of the screen facility installed at the intake, irrigation canal, etc. of the power plant. Is moved up and down to scoop up the dust trapped on the screen bar.

In a multistage arm telescopic drive type dust remover using a single-row roller chain according to claim 1 of the present invention,
The roller chain has a pair of rollers which are rotatably sandwiched between the roller links, and a plurality of the roller links are connected in series, and pin rollers on both sides sandwich the adjacent rollers so that the rollers are connected together. A roller chain having a roller pitch of, and a stopper projecting outward from one longitudinal side of the roller link is formed between the adjacent rollers, and a predetermined position outside the pin link in the longitudinal direction. A protrusion is formed in the roller link, and a reverse bending prevention function is formed to allow the pin link only in a specific rotation direction around the roller shaft located in the longitudinal direction of the roller link. And

According to a second aspect of the present invention, a multi-stage arm telescopic drive type dust remover using a single-row roller chain is the multi-stage arm telescopic drive type dust remover of claim 1 in which the dust scooped up by the rake is contracted. It is characterized by equipping the apron of the screen facility from above the rake, with a scraping means having a function of scraping off by mechanical self-weight near the upper part of the multi-stage arm expansion / contraction mechanism.

In a multistage arm telescopic drive type dust remover using a single-row roller chain according to claim 2 of the present invention,
The scraping means is provided with a holding portion near the bottom of the storage arm on the side opposite to the protruding direction of the rake, and holds the comb portion at a predetermined position on the rake side having guide rollers facing downward on both sides. A hang member rotatably in the protruding direction of the rake using a hanging member, and when the multistage arm is in an extended state, the comb portion has a stop portion that stops by tilting in the extension direction of the multistage arm. On the other hand, when the multistage arm contracts and the rake approaches the vicinity of complete contraction, the tip of the comb part lands on the rake bottom plate near the front of the rake back plate of the rake and the rake bottom plate and the guide roller. Land on the top of the rake side plates on either side of the rake, and then
Guided on the rake side plate, the tip of the comb part pushes the dust forward along the rake bottom plate, and finally provides a function of scraping the dust forward by mechanical self-weight. It is characterized by doing.

In a multistage arm telescopic drive type dust remover using a single-row roller chain according to claim 1 of the present invention,
The arm opening / closing mechanism has a cylinder / piston type expansion / contraction member fixed part that is driven by a drive source such as a motor, and is movably attached to the lower surface of the holding mechanism on the surface extending from the vertical axis to the arm central axis. The telescopic end of the telescopic member is pivotally attached to a predetermined position of the storage arm via a link, and the upper end of the storage arm is attached to the holding mechanism, and the surface extending from the vertical axis to the arm central axis is attached. The feature is that it is movably attached to the shaft.

A multistage arm telescopic drive type dust remover using a single-row roller chain according to claim 1 of the present invention,
The holding mechanism can be equipped with a horizontal movement mechanism that moves the rake to a predetermined position along the horizontal direction of the screen bar.

In a multistage arm telescopic drive type dust remover using a single row roller chain according to claim 1 of the present invention,
As a slide holding means, a plurality of sliding members, which are also called oil-free metal bushes, which form a smooth sliding surface between the arm sliding on the outside and the arm sliding on the inside, are connected in series in the longitudinal direction of the arm end. Alternatively, the sliding member may be attached to a predetermined position of the arm that slides outside by using a fixing member.

In a multistage arm telescopic drive type dust remover using a single row roller chain according to claim 1 of the present invention,
Since the roller chain forms a reverse bending prevention function, the series of the roller chain allows only a specific rotation direction and is aligned in the longitudinal direction of the roller chain even when receiving an external force of the opposite rotation. When extending inside the multi-stage arm, the multi-stage arm inner wall not only has a guiding function, but also in addition to the sliding action of the roller, at least one of the arm inner wall and the roller chain is The roller chain has a rigid body, has a power transmission function, and has an effect of easily extending the multistage arm, and when it further contracts, the roller chain is compactly guided and housed in a hierarchical manner inside the chain housing means. Since it has a built-in arm and operates in a single row, it is easy to maintain and can be made compact and lightweight. , Easily it can also be equipped with a horizontal movement mechanism for stacking the retention mechanism.

In a multistage arm telescopic drive type dust remover using a single row roller chain according to claim 2 of the present invention,
Since the scraping means has a function of scraping the dust in front of the rake by its own mechanical weight, it does not require a driving force, contributes to energy saving, and has a function of preventing the dust from falling off the rake side plate. Moreover, since it has a simple structure, it has an effect of easy maintenance.

In a multistage arm telescopic drive type dust remover using a single-row roller chain according to claim 1 of the present invention,
The arm opening / closing mechanism causes rake when the elastic member contracts.
The link serves as a buffer without overloading the elastic member, and has a function of pressing against the screen bar only by its own weight of the multi-stage arm elastic mechanism.
Even if it is sandwiched between the rake and the screen bar, the link serves as a buffer, and the rake can be raised as it is and the dust can be collected.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings of the embodiment of the present invention, FIG.
FIG. 3 is a partially cutaway side view of a multistage arm telescopic drive type dust remover using a single row roller chain, showing an embodiment of the present invention;
FIG. 2 is a partially cutaway front view thereof. Fig. 3 shows a state of use in a multi-stage arm telescopic drive type dust remover using a single-row roller chain. (A) is a partially cut-away side view in which the multi-stage arm telescopic mechanism is extended and the rake tip is brought into contact with the screen. (B) is a partially cut-away side view in which the multi-stage arm expansion / contraction mechanism is contracted and dust is scraped off using a scraping means, and (C) is a partially cut-away front view including a horizontal movement mechanism. . Fig. 4 shows a multistage arm telescopic drive type dust remover using a single-row roller chain. (A) is a partially cut-away vertical center sectional view of the multistage arm telescopic mechanism, and (B) is the multistage arm telescopic mechanism. FIG. 3 is a partially cutaway vertical center sectional view. Fig. 5 shows a roller chain with a reverse bending prevention function in a multi-arm extension / contraction drive type dust remover using a single-row roller chain, (A) is a partially omitted enlarged side view, and (B) is a partially omitted It is an enlarged front view. FIG. 6 is a partially-enlarged vertical center cross-sectional view of (A), and (B) shows a part of a multi-stage arm extension / contraction mechanism including a slide holding means in a multi-stage arm extension / contraction drive type dust remover using a single-row roller chain. FIG. FIG. 7 shows a state in which the scraping means is used when the multi-stage arm extension / contraction mechanism is contracted in the multi-stage arm extension / contraction drive type dust remover using a single-row roller chain. FIG. 3B is an enlarged side view of a partially mounted side view, FIG. 2B is an enlarged side view of the partially mounted side view in an end state, and FIG. FIG. 8 is a side view of a partially omitted side view of (A) showing a state in which a large-sized dust is collected in a multistage arm telescopic drive type dust remover using a single-row roller chain.
FIG. 7 is an enlarged side view of a part of the arm opening / closing mechanism in the vicinity thereof.

An embodiment of the present invention will be described below. A multistage arm telescopic drive type dust remover using a single-row roller chain according to claim 1 is, as shown in FIGS. 1 and 2, a lower end portion of a tip arm (1a). A multi-stage arm extending / contracting mechanism (1) having a structure in which a rake (2) is attached to the upper end of the tip arm and the structure is expandable by using a single row roller chain (9) having a reverse bending preventing function, A multistage arm telescopic drive type dust remover comprising an arm opening / closing mechanism (5) for opening and closing the arm central axis of the arm telescopic mechanism at a predetermined angle from a vertical axis, and a holding mechanism (4) for holding these mechanisms. , Screen (10) installed in power plant intake, irrigation canal, etc. screen bar (10
It is characterized in that the rake is moved up and down along the vertical direction of a) to scoop up the dust (12) captured by the screen bar.

In a multistage arm telescopic drive type dust remover using a single-row roller chain according to an embodiment corresponding to claim 1 of the present invention, a holding mechanism (4) has a horizontal structure of a screen bar (10a) as shown in FIG. Rake along the direction (2)
It is also possible to equip a horizontal movement mechanism (7) for moving the to a predetermined position.

In the multistage arm telescopic drive type dust remover using the single row roller chain of the embodiment corresponding to claim 1 of the present invention, the horizontal movement stroke of the horizontal movement mechanism (7) is
Adopted about 4.5m.

A multistage arm telescopic drive type dust remover using a single row roller chain according to an embodiment corresponding to claim 2 of the present invention is the multistage arm telescopic drive type dust remover of claim 1,
As shown in FIG. 3 (B) and FIG. 7, the dust (12) scooped up in the rake (2) is mechanically weighed from the contracted rake to the inside of the apron (10b) of the screen (10) facility. It is characterized in that a scraping means (6) having a function of scraping by action is provided in the vicinity of the upper part of the multi-stage arm expansion / contraction mechanism (1).

In the multistage arm telescopic drive type dust remover using the single row roller chain of the embodiment corresponding to claim 1 of the present invention, the multistage arm telescopic mechanism (1) has a tip arm (1a) as shown in FIG. And a square pipe-shaped multistage arm composed of a first arm (1b) and a second arm (1c) slidably connected in series using a slide holding means (8), and a square pipe shape for retractably storing the same. Storage arm (1
d), one end of which is locked to the upper end of the tip arm, and the other end of the single-row roller chain (9) passes through the inside of the multi-stage arm and through the upper opening of the storage arm to an electric motor or the like. A chain storing means (3) for guiding and storing in a hierarchical manner via a gear driven by a chain driving means (1e) is formed at the back of the storing arm, and the chain storing means is the chain storing means. A semi-circular guide plate is attached to both ends in the longitudinal direction of the roller chain so that the roller chain can be guided and stored in a hierarchical manner.

In the multistage arm telescopic drive type dust remover using the single row roller chain of the embodiment corresponding to claim 1 of the present invention, the size of the multistage arm telescopic mechanism (1) is such that the movable stroke of the multistage arm is about 4 m and the total length. : About 6 m, the square pipe side diameter of the tip arm (1a): 75 mm, the square pipe side diameter of the first arm (1b): 100 mm, the square pipe side diameter of the second arm (1c): 125 mm, and the storage arm ( The square pipe side diameter of 1d): 150 mm was adopted, and in each case, a stainless steel material having a thickness of about 6 mm was used, and a lateral width of the rake (2): 80 cm was used.

In the multistage arm telescopic drive type dust remover using the single-row roller chain of the embodiment corresponding to claim 1 of the present invention, the roller chain (9) having the reverse bending preventing function is provided on both sides as shown in FIG. Roller link (9
In b), a pair of rollers (9a) is rotatably sandwiched and attached, and further, a plurality of the roller links are connected in series, and pin rollers (9c) on both sides sandwich and attach the adjacent rollers,
A roller chain having a predetermined roller pitch, wherein a stopper (9e) projecting outward from one longitudinal side of the roller link is formed between adjacent rollers, and the longitudinal outside of the pin link is formed. A protrusion is formed at a predetermined position of the roller link, and a reverse-bending prevention function is formed so that the pin link can only rotate in a specific rotation direction around the roller shaft positioned in the longitudinal direction of the roller link. Therefore, the series of the roller chains is characterized in that it is possible to rotate only in a specific rotation direction and is aligned in the longitudinal direction of the roller chain even when receiving an external force of the opposite rotation.

In the multistage arm telescopic drive type dust remover using the single row roller chain of the embodiment corresponding to claim 1 of the present invention, the roller chain (9) has a roller pitch of about 10 cm and a roller (9a). Diameter: Approximately 3 cm was adopted.

In a multistage arm telescopic drive type dust remover using a single row roller chain according to an embodiment corresponding to claim 1 of the present invention, as a slide holding means (8) for slidably connecting square pipe-shaped multistage arms in series. , As shown in FIG. 6, a non-lubricating metal bush (for example, a lubricant-added brass) that forms a smooth sliding surface between the arm (1c) sliding on the outside and the arm (1b) sliding on the inside. Also, a plurality of sliding members (8a) may be provided in series in the arm end longitudinal direction, and the sliding members may be attached to a predetermined position of the outer sliding arm by using a fixing member (8b). I can. Furthermore, as a stopper when each of the arms is completely contracted, a total stop member (8c) is provided at the lower end of each sliding arm so that the arm can stop at the lower end of the arm on the outside thereof. As a stopper when each of the arms is completely extended, a full extension stop member may be provided at the upper end of each sliding arm so that the full extension stop member is stopped by the fixing member.

In a multistage arm telescopic drive type dust remover using a single-row roller chain according to an embodiment corresponding to claim 2 of the present invention, the dust (12) scooped up by the rake (2) is removed from above the contracted rake. As shown in FIG. 7, the scraping means (6) having a function of scraping off by mechanical self-weight, the holding part (6b) is provided near the lower part of the storage arm (1d) on the side opposite to the protruding direction of the rake. And a comb portion (6a) having guide rollers (6d) facing downward on both sides, and a hanging member (6) at a predetermined position on the rake side from the holding portion.
e) is rotatably suspended in the protruding direction of the rake, and when the multistage arm is in the extended state, the comb portion has a stop portion (6c) that stops by tilting in the extension direction of the multistage arm due to its own weight. On the other hand, when the multistage arm contracts and the rake approaches the vicinity of complete contraction, as shown in FIG. 7 (A), the tip of the comb portion is located near the front of the rake back plate (2c) of the rake. While landing on the rake bottom plate (2d) accommodating the dust, the guide rollers land on the upper ends of the rake side plates (2a) on both sides of the rake, and then are guided on the rake side plate and the comb part The tip pushes the dust forward along the rake bottom plate, and finally, as shown in FIG.
As shown in (B), it is characterized by providing a function of scraping the dust forward by a mechanical self-weight effect.

In the multistage arm telescopic drive type dust remover by the single row roller chain of the embodiment corresponding to claim 1 of the present invention, the arm central axis of the multistage arm telescopic mechanism (1) can be opened and closed at a predetermined angle from the vertical axis. As shown in FIG. 8, the arm opening / closing mechanism (5) is a cylinder / piston type expansion / contraction member (5) driven by a drive source such as a motor.
The fixed part of b) is rotatably attached to the lower part of the holding mechanism (4) on the surface extending from the vertical axis to the arm central axis, and the expandable end of the expandable member is stored via the link (5a). The arm (1d) is pivotally attached to a predetermined position, and the holding arm is movably attached to a surface extending from the vertical axis to the arm central axis from the upper end of the storage arm. When the elastic member contracts, as shown in FIG. 3A, the rake (2) does not overload the elastic member, the link serves as a buffer, and only the self-weight of the multi-stage arm elastic mechanism is used. It has a function of pressing it against the screen bar (10a), and as shown in FIG.
Even if 2) is sandwiched between the rake (2) and the screen bar, the link serves as a buffer and the rake can be raised as it is to collect the dust.

[0029]

The present invention is carried out in the form as described above and has the effects as described below.

In the multistage arm telescopic drive type dust remover using the single row roller chain of the present invention, since the roller chain has a function of preventing reverse bending, when the multistage arm is extended, it is slidably extended in the extending direction. In addition to the effect of transmitting power, it has the effect of easily extending the multistage arm, and when it further contracts, it has the effect of compactly guiding and accommodating it in the chain accommodating means in a hierarchical manner, and Since it operates in a single row, it is easy to maintain and maintain, and it can be made compact and lightweight.
It is compact and lightweight, and can be equipped with a horizontal movement mechanism to easily load the holding mechanism.

The multistage arm telescopic drive type dust remover using the single row roller chain of the present invention does not need a driving force because it uses a scraping means and has a function of scraping dusts in front of the rake by mechanical self-weight action. It contributes to energy saving, has an effect of preventing the dust from falling off from the rake side plate, and has an effect that maintenance is easy because of its simple structure.

The multistage arm telescopic drive type dust remover using the single-row roller chain of the present invention uses an arm opening / closing mechanism, and when the telescopic member contracts, the rake does not overload the telescopic member and the link cushions. It has the effect of pressing against the screen bar only by its own weight of the multi-stage arm expansion and contraction mechanism. Moreover, even if a large dust is sandwiched between the rake and the screen bar, the link becomes a buffer part and remains as it is. It is also possible to raise the rake and collect the dust.

[Brief description of drawings]

FIG. 1 is a partial cutaway side view of a multistage arm telescopic drive type dust remover using a single-row roller chain, showing an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of a multistage arm telescopic drive type dust remover using a single row roller chain, showing an embodiment of the present invention.

FIG. 3 shows an embodiment of the present invention in a multistage arm telescopic drive type dust eliminator using a single row roller chain, (A) shows the multistage arm telescopic mechanism extended and the rake tip portion brought into contact with the screen. ， Partially missing side view, (B)
Shrank the multi-stage arm expansion and contraction mechanism and scraped off dust using a scraping means. Partial missing side view, and (C)
Is a partially omitted front view including a horizontal movement mechanism.

FIG. 4 is a partially cut-away vertical center sectional view of a multistage arm telescopic drive type dust remover using a single-row roller chain showing an embodiment of the present invention, in which a multistage arm telescopic mechanism is extended, and (B). ) Is a partially cut-away vertical center sectional view of the multi-stage arm expansion / contraction mechanism contracted.

FIG. 5 is a partially omitted enlarged side view (A) of a roller chain having a reverse bending preventing function in a multistage arm telescopic drive type dust remover using a single-row roller chain, showing an embodiment of the present invention; B) is a partially omitted enlarged front view.

FIG. 6 (A) is a partially omitted enlarged vertical central sectional view of a multi-stage arm extension / contraction mechanism including a slide holding means in a multi-stage arm extension / contraction drive type dust remover using a single-row roller chain, showing an embodiment of the present invention. , And (B) is a partially omitted enlarged cross-sectional view.

FIG. 7 is a view showing an embodiment of the present invention, showing the use state of scraping means when the multistage arm telescopic mechanism is contracted in the multistage arm telescopic drive type dust remover using a single row roller chain,
(A) is a partially omitted enlarged side view of the state in which dust is being scraped off, (B) is a partially omitted enlarged side view of the finished state, and (C) is an partially omitted enlarged state of the initial state. Rear view.

FIG. 8 is a partially cutaway side view of (A) in a use state for collecting large dust in a multistage arm telescopic drive type dust remover using a single row roller chain, showing an embodiment of the present invention. (B) is an enlarged side view of a part of the arm opening / closing mechanism in the vicinity thereof.

[Explanation of symbols]

1 Multi-stage arm extension mechanism 1a Tip arm 1b First arm 1c Second arm 1d storage arm 1e Chain drive means 2 rake 2a Rake side plate 2b Rake guide roller 2c rake backboard 2d rake bottom plate 3 Chain storage means 4 holding mechanism 5 Arm opening / closing mechanism 5a link 5b Elastic member 5c drive 6 scraping means 6a comb part 6b holding part 6c Stop part 6d guide roller 6e Hanging member 7 Horizontal movement mechanism 7a running rail 7b Guide roller 8 Sliding holding means 8a sliding member 8b fixing member 8c Full reduction member 9 Roller chain 9a roller 9b Roller link 9c pin link 9d pin 9e Stopper 9f Reverse bend prevention claw 10 screens 10a screen bar 10b apron 11 Intake 11a Flow direction 11b Water surface 12 dust

Claims (2)

[Claims] 1. A rake (2) at the lower end of the tip arm (1a).
And a multi-stage arm extending / contracting mechanism (1) having a structure capable of expanding and contracting by using a single-row roller chain (9) having a reverse bending preventing function, which is connected to the upper end of the tip arm, and an arm of the multi-stage arm expanding / contracting mechanism. A multistage arm telescopic drive type dust remover comprising an arm opening / closing mechanism (5) for opening and closing a central axis at a predetermined angle from a vertical axis, and a holding mechanism (4) for holding these mechanisms. The mechanism is
The tip arm has a square pipe-shaped storage arm (1d) for retractably storing the tip arm and a square pipe-shaped multistage arm slidably connected in series using a slide holding means (8). The other end of the single row of roller chains, one end of which is locked at the upper end, is guided in a hierarchical manner by the chain drive means (1e) from the upper opening of the storage arm through the inside of the multistage arm. Chain accommodating means (3) for accommodating is formed outside the accommodating arm, and the chain accommodating means allows the roller chains to be hierarchically guided and accommodated at both longitudinal ends of the chain accommodating means,
And along the vertical direction of the screen bar (10a),
A multistage arm telescopic drive type dust remover using a single-row roller chain, characterized by raising and lowering the rake and picking up the captured dust (12). 2. A function of a multi-stage arm extension / contraction mechanism (1) for scraping dust (12) scooped up by a rake (2) from the contracted rake to the inside of the apron (10b) by a mechanical self-weight effect. The multistage arm telescopic drive type dust remover by a single-row roller chain according to claim 1, characterized in that the scraping means (6) having the above is provided near the upper part of the multistage arm telescopic mechanism.