JP7194350B2 - dust remover - Google Patents

Description

TECHNICAL FIELD The present invention relates to a dust remover suitable for use in manually removing dust from a screen at a relatively small-scale location such as a water intake.

In order to secure a stable amount of water intake for hydroelectric power plants, screens such as water intakes (multiple bars arranged in parallel in the direction perpendicular to the water flow and multiple plate spacers arranged in parallel in the longitudinal direction of the bars) It is necessary to remove dust adhering to the bar screen with

For this reason, electric dust removers are installed in large-scale locations such as water intakes, but in relatively small-scale locations such as water intakes, the upper part of the screen is narrow and the space is limited, so large equipment is not required. Therefore, a rake 110 (comprising a rake 111 with a plurality of teeth arranged side by side and an operation rod 112 with the rake 111 attached to one end) as shown in FIG. 4 is used. Worker A periodically removes dust from the screen manually.

That is, the worker A holds the other end of the operating rod 112 of the rake 110 by hand, throws the rake 111 side away from the screen 120 as shown by the broken line in FIG. Then, the operation rod 112 is gradually lifted to lift the rake 111 from below the screen 120 along the bar, and the rake 111 is deposited on the screen 120. It is raking up dust.

However, such a screen dust removal work involves water pressure due to water currents, and is labor intensive, inefficient, and dangerous.

Therefore, in Patent Document 1 below, a suspension rail is horizontally supported above a screen provided in a water channel, and a traveling frame is provided so as to be movable in the width direction of the water channel along the suspension rail, thereby controlling the attitude. A group of guide rollers is supported by a power cylinder so that it can swing in the direction of the waterway. A simple dust remover is disclosed in which the dust scraping tool is lifted and lowered by the rotation of the wire drum by being fixed to the lower part of the tool to remove the dust.

In addition, the present applicant discloses a lower moving body slidable along a lower guide rail, an upper moving body slidable along an upper guide rail, and a lower moving body slidable along a connecting bar in Patent Document 2 below. A lower support that is connected to the moving body and slidably supports the rod-shaped rake, and an upper support that is connected to the upper moving body so as to be rotatable about a horizontal axis and slidably supports the rod-shaped rake. body, an electric chain block for raising and lowering the rake of the rake, and a movable opening/closing lever provided on the connecting bar, and by moving the opening/closing lever, the upper support rotates to change the angle of the rake with respect to the screen. We are proposing a dust remover that

JP-A-11-93144 JP 2017-106217 A

However, the simple dust remover disclosed in Patent Document 1 has the following problems.
(a) If the wire is caught in dust during screen dust removal work, it may lead to breakage of the wire.
(b) Since a power cylinder is required, the equipment structure becomes complicated.
(c) high maintenance costs due to the need for periodic wire replacement;
(d) Since it is permanently installed at the site, it cannot be used at other sites.

In the dust remover proposed in Patent Document 2, a cable guide rail extending parallel to the upper guide rail is arranged on the lower surface of each rail support member in order to raise and lower the rake of the rake by means of the electric chain block. There is a problem that it is necessary to movably arrange a plurality of cable pulleys attached to the power cable of the electric chain hoist on the rail so that the power cable can move and extend and contract along the cable guide rail.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a dust remover that can safely remove dust from a screen manually and that has versatility.

The dust remover of the present invention is a dust remover (10) for use in screen dust removal work for removing dust accumulated on a screen (120) having a plurality of bars arranged in parallel in a direction perpendicular to a water flow. a rake (20) comprising a rake (21) and a rack bar (22) to which said rake is attached at one end; and a lifting mechanism (30) for attaching said rake when performing said screen cleaning operation. The lifting mechanism comprises a truck (31) to which casters (31a) with locks are attached, and a manual handle attached to the truck via a first mounting member (32) and on the side of the truck (31). (33a) attached to a driving spur gear (33); a driven spur gear (35) attached to said truck via a second mounting member (34) so as to mesh with said driving spur gear; a braking mechanism (36) mounted on the bogie via the second mounting member and for preventing reverse rotation of the driven spur gear, wherein the rack bar of the rake comprises a plurality of rack pins The driven spur gear is engaged by (22a) so that the driving force of the drive spur gear is transmitted through the driven spur gear . (A) attaches the rake to the lifting mechanism so that the plurality of rack pins of the rack bar of the rake are engaged with the driven spur gear; After the rake is dropped by its own weight so as to reach the vicinity of the lower end of the screen, the manual handle of the drive spur gear is rotated in a state in which the reverse rotation of the driven spur gear is prevented by the brake mechanism, whereby the rake is is pulled up through the driven spur gear to scrape up the dust accumulated on the screen .
Here, the brake mechanism comprises an L-shaped steel mounting member (36a) attached to the second mounting member and an L-shaped steel mounting member rotatably mounted to the L-shaped steel mounting member via an L-shaped steel rotating shaft (36c). a steel member (36b), a brake release lever (36d) attached to said L-shaped steel member, and a steel having one end fixed to said L-shaped steel member and the other end fixed to said second mounting member. a spring (36e) and a stop (36f) attached to the L-shaped steel mounting member for restricting the rotation of the L-shaped steel member by the biasing force of the steel spring. good.
It further comprises a drop-off prevention cover (40) attached to the cart via a third attachment member (37) and for preventing the rake from dropping out of the lifting mechanism during the screen dust removal operation. The drop-off prevention cover may have a structure in which the rack bar of the rake can be attached and the lifting angle of the rake can be adjusted.
The lifting mechanism may further include lifting mechanism overturn prevention means (31b, 38, 39) for preventing overturning during the screen dust removal operation.

The dust remover of the present invention has the following effects.
(1) Since the brake mechanism has a function to prevent reverse rotation of the driven spur gear, it is possible to prevent reverse rotation of the manual handle of the drive spur gear due to the weight of dust (safety of manual screen dust removal work).
(2) Since the lifting mechanism of the rake can be made lightweight (about 5 to 30 kg), it can be carried to other sites for use (versatility).
(3) The screen can be dust-removed without immersing the lifting mechanism in water, and after the work is completed, the screen can be brought back and stored in a warehouse, thereby prolonging the life of the screen (reducing costs).
(4) Since the rake can be lowered by its own weight by releasing the brake mechanism, the effort required to lower the rake can be reduced.
(5) The structure can be simplified, and the number of damaged parts can be reduced to reduce maintenance costs.

Fig. 2 is a view of the dust remover 10 according to one embodiment of the present invention as seen from the right side (a portion of the rack bar 22 and the drop-off prevention cover 40 are shown in cross section); It is the figure seen from the right side of the dust remover 10 for demonstrating the brake with a lock 36 shown in FIG. FIG. 3 is a diagram for explaining a state in which the rake 20 is attached to the lifting mechanism 30, (a) is a diagram viewed from the front side of the dust remover 10, and (b) is a diagram viewed from the rear side of the dust remover 10. FIG. , (c) is a view of the dust remover 10 viewed from the right side, and (d) is a view of the dust remover 10 viewed from the left side. It is a figure for demonstrating the screen dust-removal work by the conventional human power.

The above object is realized by transmitting the driving force of the driving spur gear to the rack bar of the rake through the driven spur gear, and preventing reverse rotation of the driven spur gear during screen dust removal operation by means of a brake mechanism.

An embodiment of the dust remover of the present invention will be described below with reference to the drawings.
The dust remover of the present invention has the following features.
(1) In order to simplify the mechanism for pulling up the rake, by engaging a driving spur gear and a driven spur gear of a size that can be carried by a person, turning a manual handle attached to the driving spur gear pulls up the rake to remove dust. so that it can be scraped up.
(2) A structure in which a plurality of rack pins are provided on the rack bar of the rake and engaged with the driven spur gear so that the driving force of the drive spur gear can be transmitted to the rack bar via the driven spur gear.
(3) A brake mechanism for the driven spur gear is provided to prevent reverse rotation of the driven spur gear, and the brake mechanism is released to allow the rake to descend under its own weight.
(4) In order to prevent the rake from falling off from the lifting mechanism during the screen dust removal operation, the lifting mechanism is provided with a fall prevention cover, and the rack bar of the rake is attached to the fall prevention cover and the lifting angle of the rake is adjusted. It has an adjustable structure.
(5) The lifting mechanism connects one end of the anti-tipping wire to a handrail or the like on the wall to prevent it from tipping over during the screen dust removal work. To enable a person to carry it by removing it from a handrail or the like for prevention.

Therefore, the dust remover 10 according to one embodiment of the present invention comprises a rake 20 and a lifting mechanism 30 for the rake 20, as shown in FIG.

Here, the rake 20 includes a rake 21 having a plurality of teeth arranged side by side, and a rack bar 22 (steel bar) having the rake 21 attached to one end.
The lifting mechanism 30 includes a carriage 31 having a flat plate-like body, and four plate-shaped drive spur gear mounting members 32 (two drive spur gear mounting members 32 on the right side) attached to the upper surface of the body of the carriage 31. (only the gear mounting member 32 is shown), a drive spur gear 33 (made of steel) with a manual handle 33a mounted on the right side, and a plate-like driven spur gear/brake mounting member 34 mounted on the upper surface of the main body of the truck 31. , a driven spur gear 35 (made of steel), a brake with lock 36 (made of steel), a plate-like cover mounting member 37 attached to the upper surface of the main body of the truck 31, an overturn prevention wire 38, and overturn prevention One end of the wire 38 is attached to the wall along the width direction of the screen 120 (perpendicular to the paper surface of FIG. 1) to prevent falling by attaching a safety belt to the wall. ), and a fall prevention cover 40 for preventing the rake 20 from coming off the lifting mechanism 30 and falling.

The rack bar 22 of the rake 20 has a plurality of rack pins 22a arranged in parallel along the longitudinal direction of the rack bar 22 at an integral multiple of the pitch interval of the driven spur gear 35 .
As a result, since the plurality of rack pins 22a and the driven spur gear 35 are engaged, when the driven spur gear 35 is rotated clockwise in FIG. The rake 20 can be pulled up obliquely upward to the right in the drawing.

The main body of the carriage 31 of the lifting mechanism 30 is provided with casters 31a with locks so that the lifting mechanism 30 can be moved when the screen dust removal work is not performed and the lifting mechanism 30 cannot be moved during the screen dust removal work. are attached to the four corners of the bottom surface.

In addition, in order to prevent the lifting mechanism 30 from falling during the screen dust removal operation, a ring for attaching one end of an anti-falling wire 38 is attached to the central portion of the back surface of the main body of the carriage 31 (the right side surface in FIG. 1). A wire mounting bracket 31 b is provided, and the other end of the overturn prevention wire 38 is attached to the overturn prevention handrail 50 via a chill hole 39 .

When the rake 20 is to be moved along the width of the screen 120 (see FIG. 4) during the screen dust removal operation, the casters 31a with locks are unlocked to move the truck 31 and the chill hole 39. At this time, by sliding the other end of the fall prevention wire 38 along the longitudinal direction of the fall prevention handrail 50, it is possible to prevent the lifting mechanism 30 from accidentally falling during movement.

Two of the four driving spur gear mounting members 32 have their upper ends connected and their lower ends standing on the right side of the main body of the truck 31 with a predetermined gap. is set.
The remaining two driving spur gear mounting members 32 out of the two driving spur gear mounting members 32 have their upper ends connected and their lower ends positioned to the left of the central portion of the main body of the truck 31 with a predetermined gap therebetween. It is erected on the face side so as to face the two drive spur gear mounting members 32 on the right side face.

The driving spur gear 33 has one end rotatably attached to the upper ends of the two driving spur gear mounting members 32 on the right side and the other end rotatably attached to the two driving spur gear mounting members 32 on the left side. It is mounted on a drive spur gear axle (not shown) rotatably mounted on the upper end.

The driven spur gear/brake mounting member 34 is vertically erected on the upper surface of the body of the carriage 31 closer to the front side than the two driving spur gear mounting members 32 on the right side.

The driven spur gear 35 is rotatably mounted on the left side of the upper end portion of the driven spur gear/brake mounting member 34 so as to mesh with the drive spur gear 33 .

As a result, the worker A manually rotates the manual handle 33a of the drive spur gear 33 counterclockwise in FIG. 1 to rotate the drive spur gear 33 in this direction (see the arrow in FIG. 35 can be rotated around to raise the rake 20 .

The lock-equipped brake 36 functions as a brake mechanism for the driven spur gear 35, and as shown in FIG. , a brake release lever 36d, a steel spring 36e and a catch 36f.

The back surface of the L-shaped steel mounting member 36a (the right surface in FIG. 2) is attached to the front surface of the driven spur gear/brake mounting member 34 (the left surface in FIG. 2).

The L-shaped steel member 36b has an L-shaped plate shape in which a horizontal piece is integrally attached to the lower end of a vertical piece so as to protrude perpendicularly to the side opposite to the driven spur gear/brake mounting member 34 .

The left end of the L-shaped steel rotating shaft 36c is rotatably attached to the right side surface of the L-shaped steel mounting member 36a, and the right end is fixed to the lower end of the vertical piece of the L-shaped steel member 36b.

The brake release lever 36d is erected on the right side of the horizontal piece of the L-shaped steel member 36b.

The steel spring 36e is a tension spring with one end fixed to the upper end of the vertical piece of the L-shaped steel member 36b and the other end fixed to the right side of the driven spur gear/brake mounting member 34. there is

The latch 36f is for restricting the L-shaped steel member 36b from rotating clockwise in FIG. It is attached to the right side of the attachment member 36a.
In other words, even if the L-shaped steel member 36b is rotated in the urging rotation by the urging force of the steel spring 36e, the vertical piece of the L-shaped steel member 36b abuts against the stopper 36f and remains vertical. It is made not to rotate above.

As a result, normally, the L-shaped steel member 36b is urged by the steel spring 36e to come into contact with the driven spur gear 35, so that the driven spur gear 35 is prevented from rotating in the counter-pull-up rotation.
When the driven spur gear 35 is rotated upward while the L-shaped steel member 36b is in contact with the stopper 36f, the L-shaped steel member 36b is pushed by the driven spur gear 35 and resists the biasing force of the steel spring 36e. Then, the driven spur gear 35 rotates counterclockwise (counterclockwise in FIG. 2) around the L-shaped steel rotary shaft 36c and leaves the driven spur gear 35, so that the driven spur gear 35 can rotate in a pull-up direction. .
Further, as indicated by the arrow in FIG. 2, when the worker A holds the brake release lever 36d and pushes it down, the steel spring 36e extends, and the L-shaped steel member 36b resists the biasing force of the steel spring 36e. The weight of the rake 20 causes the driven spur gear 35 to rotate in the anti-pull-up rotation, so that the rake 20 descends under its own weight (the weight of the rake 21).

As shown in FIG. 1, the cover mounting member 37 is mounted on the upper surface of the main body of the carriage 31 closer to the front side than the driven spur gear/brake mounting member 34. As shown in FIG.
Further, the cover mounting member 37 is mounted so as to be positioned on the left side of the main body of the carriage 31 .

At the upper end of the cover mounting member 37, a threaded hole for screwing with the wing bolt 41 is provided so that the drop prevention cover 40 can be mounted on the upper end of the cover mounting member 37 with the wing bolt 41 so that the angle can be adjusted. It is formed from the surface to the right side (see FIG. 3(a)).

As shown in FIG. 3(b), the drop-off prevention cover 40 has a cylindrical shape with a window on the back side, and is arranged along the longitudinal direction on the left side as shown in FIG. 3(d). It has a two-split structure that is connected by two hinges 43 so that it can be opened and closed.
The drop-off prevention cover 40 can be opened by unlocking two snap locks 42 arranged side by side along the longitudinal direction on the right side as shown in FIGS. If the snap lock 42 is locked, it can be kept closed.

Next, how to use the dust remover 10 will be described.
After setting the lifting mechanism 30 to the working position, the operator A locks the locking casters 31 a of the cart 30 and attaches the other end of the overturn prevention wire 38 to the fall prevention handrail 50 .

After that, the worker A unlocks the two snap locks 42 to open the drop-prevention cover 40, and pulls a part of the rack bar 22 of the rake 20 so that the rack pin 22a meshes with the driven spur gear 35. After putting it inside, the falling prevention cover 40 is closed, two snap locks 42 are locked, and the rake 20 is attached to the falling prevention cover 40.例文帳に追加

After that, the worker A slightly loosens the wing bolt 41 and adjusts the angle so that the rake 20 is substantially parallel to the screen 120 (see FIG. 4). fixed to

After that, the worker A pushes down the brake release lever 36d to separate the L-shaped steel member 36b from the driven spur gear 35 to release the brake with lock 36, and then moves the rake 21 to the vicinity of the lower end of the screen 120 with a rake. 20 is dropped by its own weight.

After that, the worker A pulls up the brake release lever 36d to bring the L-shaped steel member 36b into contact with the driven spur gear 35, and then turns the manual handle 33a of the driving spur gear 33 to pull up the driven spur gear 35 and rotate it. The dust accumulated on the screen 120 is scraped up by pulling up the rake 20.
At this time, even if the worker A accidentally releases the rake 20, the brake with lock 36 can prevent the driven spur gear 35 from rotating in the reverse direction, thereby preventing the rake 20 from falling.

After that, when the screen dust removal work at this working position is completed, the worker A unlocks the lockable casters 31a of the truck 30, moves the truck 31, the fall prevention wire 38 and the chill hole 39, and pulls up. Set the mechanism 30 to the next working position.

After that, worker A performs screen dust removal work by repeating the same procedure.

When the screen dust removal work is completed, the worker A unlocks the two snap locks 42 to open the fall prevention cover 40, removes the rake 20 from the fall prevention cover 40, closes the fall prevention cover 40 and 2 The snap lock 42 is locked.

After that, the worker A removes the fall prevention wire 38 from the chill hole 39 and the fall prevention handrail 50, carries the rake 20 and the lifting mechanism 30, and removes the dust remover 10 from the screen dust removal work place.

10 dust remover 20 rake 21 rake 22 rack rod 22a rack pin 30 lifting mechanism 31 truck 31a caster with lock 31b wire mounting bracket 32 drive spur gear mounting member 33 drive spur gear 33a manual handle 34 driven spur gear/brake mounting member 35 driven spur gear 36 Brake with lock 36a L-shaped steel mounting member 36b L-shaped steel member 36c L-shaped steel rotating shaft 36d Brake release lever 36e Steel spring 36f Stopper 37 Cover mounting member 38 Overturn prevention wire 39 Chill hole 40 Drop prevention cover 41 Butterfly bolt 42 Patch lock 43 Hinge 50 Handrail 110 for fall prevention Rake 111 Rake 112 Operating rod 120 Screen A Worker

Claims (4)

A dust remover (10) for use in screen dust removal work for removing dust accumulated on a screen (120) having a plurality of bars arranged in parallel in a direction perpendicular to the water flow ,
a rake (20) comprising a rake (21) and a rack bar (22) to which said rake is attached at one end;
a lifting mechanism (30) for attaching the rake when performing the screen dust removal work,
The pulling mechanism is
A truck (31) to which lockable casters (31a) are attached;
a drive spur gear (33) attached to the truck via a first attachment member (32) and having a manual handle (33a) attached to its side;
a driven spur gear (35) mounted on the truck via a second mounting member (34) to mesh with the drive spur gear;
a brake mechanism (36) attached to the bogie via the second attachment member and for preventing reverse rotation of the driven spur gear,
The rack bar of the rake has a structure in which the driven spur gear engages with a plurality of rack pins (22a) so that the driving force of the driving spur gear is transmitted through the driven spur gear ,
When performing the screen dust removal work, a worker (A) attaches the rake to the lifting mechanism so that the plurality of rack pins of the rack rod of the rake are engaged with the driven spur gear, and the brake After the mechanism is opened and the rake of the rake is dropped by its own weight so that it reaches the vicinity of the lower end of the screen, the driving spur gear is prevented from rotating reversely by the brake mechanism. By turning the manual handle of the gear, the rake is raised through the driven spur gear to rake up the debris that has accumulated on the screen .
A dust remover characterized by: The brake mechanism
an L-shaped steel mounting member (36a) attached to said second mounting member;
an L-shaped steel member (36b) rotatably attached to the L-shaped steel mounting member via an L-shaped steel rotating shaft (36c);
a brake release lever (36d) attached to the L-shaped steel member;
a steel spring (36e) having one end fixed to the L-shaped steel member and the other end fixed to the second mounting member;
a catch (36f) attached to the L-shaped steel mounting member and for restricting the rotation of the L-shaped steel member by the biasing force of the steel spring;
The dust remover according to claim 1, characterized by: It further comprises a drop-off prevention cover (40) attached to the cart via a third attachment member (37) and for preventing the rake from dropping out of the lifting mechanism during the screen dust removal operation. death,
The drop-off prevention cover has a structure in which the rack bar of the rake can be attached and the lifting angle of the rake can be adjusted.
3. The dust remover according to claim 1 or 2, characterized in that: The dust remover according to any one of claims 1 to 3, characterized in that said lifting mechanism further comprises lifting mechanism overturn prevention means (31b, 38, 39) for preventing overturning during said screen dust removal operation. .

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