JP3233908B2 - Dust removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust removing device for catching dust such as algae and grass clumps flowing in a waterway or the like by a screen while scavenging the dust with a rake.

[0002]

2. Description of the Related Art Conventionally, a screen for capturing dust such as algae and a lump of grass is interposed in a waterway or the like, and the dust captured by the screen is raked (rake-shaped scraping member).
A dust removing device which is lifted by a squeeze and carried out of a water channel is generally known.

In this device, the rake is mounted, for example, at the tip of an arm. The rake is moved up and down by driving the arm up and down, and the working position at which the rake comes into contact with the screen is driven by swinging the arm. It is oscillatingly displaced to a position away from the screen. Then, at the time of work, first, lower the arm with the rake set at a position away from the screen, place the rake on the bottom of the water, then swing the arm and set the rake to the work position, then set the arm To raise.
As a result, the trash trapped on the screen can be scooped up by a rake.

[0004]

In the above-described dust removing apparatus, a removing member called a scraper for removing dust scraped up by a rake is provided at an upper end portion of the screen. When the rake is set in place at the top edge of the screen, the scraper
The rake claw moves from the proximal end to the distal end, thereby removing the scraped dust from the rake.

[0005] By the way, the scraper is classified into a power type operated by using a dedicated motor and an electric cylinder, and a non-power type operated by interlocking with the raising and lowering of the rake.

[0006] Here, the power type is advantageous in that dust can be strongly removed, but is disadvantageous in terms of simplification of the apparatus or cost reduction because a dedicated driving means is required. is there. On the other hand, the non-powered type is advantageous in terms of simplification of the device and cost reduction because no driving means is required, but when there is a lot of scraped dust, etc. It has the disadvantage that it may not be able to be removed. Further, in order to operate the scraper, it is necessary to set the rake up / down stroke longer than that of the power type, and there is a drawback that the overall height of the device is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a dust removing apparatus capable of appropriately removing dust from a rake, and which is advantageous in simplifying the apparatus and reducing costs. It is intended to be.

[0008]

In order to solve the above-mentioned problems, the present invention provides a rake for scraping dust caught by a screen at the tip of an arm supported so as to be able to swing and move up and down. A dust removing device configured to displace the rake between a work position approaching the screen and a position away from the screen by swinging the arm, and move the rake up and down along the screen by raising and lowering the arm. In the apparatus, an engaging member engageable with the arm and a driving means for driving the engaging member forward and backward in the swinging direction of the arm are provided, and the removing member for removing the scraped dust from the rake is provided with the engaging member. The rake is disposed at the working position when the engaging member is disposed at a predetermined reference position of the reciprocating stroke, and the engaging member is disposed integrally with the member. When retracted from the reference position, the engaging member engages the arm and displaces the arm in a direction in which the rake moves away from the screen, while when the engaging member is advanced from the reference position, the engaging member moves relative to the arm. The engaging member, the removing member, and the driving means are configured to relatively displace and move the removing member from the base end to the distal end of the rake claw portion (claim 1).

According to this device, when the engagement member is driven forward and backward by the drive means, the arm is displaced in a swinging manner. At this time, when the engaging member is advanced from a predetermined reference position of the reciprocating stroke, the removing member moves along the claw portion of the rake due to the relative displacement of the engaging member with respect to the arm, thereby being lifted up. Waste is removed from the rake. That is, according to this device, the driving means for swinging the rake is shared as the driving means for driving the removing member.

In the above-mentioned device, it is possible to adopt a configuration in which a cylinder is provided as a driving means, and the engaging member is connected to a piston rod of the cylinder. With this configuration, the engaging member can be driven forward and backward with a simple configuration. The cylinder according to claim 2 means various cylinders such as a hydraulic cylinder, an air cylinder, and an electric cylinder.

When the screen width is large, the width of the rake is also widened, and the removing member is correspondingly elongated in the width direction of the rake. It is desirable to provide a guide means for guiding the member in the forward and backward directions (claim 3). With this configuration, the removing member is less likely to be twisted, and the removing member can be operated smoothly.

Preferably, the engaging member is provided with a guide roller for guiding the arm to a portion where the arm is engaged with the arm. With this configuration, even when the arm is moved up and down while the engagement member is engaged with the arm, frictional resistance can be reduced and the arm can be moved up and down smoothly.

[0013]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a dust removing apparatus according to the present invention. As shown in this figure, the dust removing device includes a screen 10 provided in the water channel Ws,
And a device main body 12 that scoops up and removes dust such as algae and grass clumps that are caught by zero.

The screen 10 is a so-called bar screen in which bars are arranged side by side at regular intervals. For example, the width direction of the water channel Ws is set at an interval of about 20 mm (in the figure, a direction perpendicular to the paper surface; hereinafter, simply referred to as the width direction). Are arranged side by side, and the bar is configured to catch dust. Further, the upper end of the screen 10 is extended to above the waterway Ws, and dust is removed by the rake 20 described later.
It can be lifted outside. In addition, as the screen 10, a screen having a mesh-shaped dust collecting surface so as to capture finer dust can be applied in addition to the bar screen.

The apparatus main body 12 includes a fixed frame 1 installed over the water channel Ws above the screen 10.
4a, the frame 14a has a rake 20 for scraping the trapped dust, and a rake 20
And a drive mechanism for raising and lowering and swinging.

The rake 20 is, for example, a screen 1
It has an elongated frame in the width direction of 0, and has a number of claws arranged side by side, and is configured to be lifted from the bottom of the water along the screen 10 so that dust caught by the screen 10 can be scooped up. I have.

The drive mechanism for raising and lowering and swinging the rake 20 is constructed as follows. That is, a shaft 16 extending in the width direction is provided on the fixed frame 14a, and the swing frame 14b is rotatably supported by the shaft 16 and extends vertically in the swing frame 14b. A columnar arm 18 is supported, and the rake 20 is fixed to the lower end of the arm 18.

The arm 18 is supported so as to be able to move up and down in the longitudinal direction with respect to the swing frame 14b. Although not shown, a side surface of the arm 18 (a left side surface in the figure).
A rack is formed in the longitudinal direction of the swing frame 14b.
The pinion 22 supported by this is engaged with this rack. A motor 26 is mounted on the swing frame 14b, and a sprocket 28 mounted on an output shaft of the motor 26 and a sprocket 24 connected to the pinion 22 are mounted.
The chain 30 is mounted between the two. As a result, when the motor 26 is driven forward and reverse, the arm 1
8 moves up and down with respect to the fixed frame 14a, and the rake 20 moves up and down integrally therewith.

An engaging frame 36 (engaging member) capable of engaging with the arm 18 is provided at the upper end portion of the screen 10 and at a position facing the upper end portion.

As shown in FIG. 2 (a), the engagement frame 36 swings the arm 18 in the swinging direction (in the figure, the left and right direction).
The bracket 37a has a U-shaped frame having a pair of brackets 37a extending in a plan view. A scraper 38 described later is attached to a tip portion (right end portion in the figure) of each bracket 37a, and the scraper 38 and the engagement frame 36, the arm 18 penetrates a rectangular hollow portion. In the figure, reference numeral 40 denotes a roller rotatably supported by the scraper 38,
8, specifically, the side opposite to the rack forming side.

As shown in FIG. 1, the engaging frame 36 is attached to the tip of a cylinder rod 34 of an electric cylinder 32 fixed to the fixed frame 14a. It is designed to be driven forward and backward.

The engaging frame 34 engages with the arm 18 in accordance with the driving of the engaging frame 34 so as to swing the rake 20.

That is, when no external force acts on the arm 18, the arm 18 rotates around the shaft 16 by its own weight, thereby bringing the rake 20 into a predetermined working position where the rake 20 approaches the screen 10 (the position shown in FIG. 1). Is held. For more information,
When a part of the rake 20 is engaged with the upper end portion of the screen, the rotation of the arm 18 due to its own weight is prevented, and the rake 20 is restrained at the working position. The state in which the roller 40 is in contact with the side surface of the arm 18 in this state is defined as a reference position (the position shown in FIGS. 1 and 2A) for the reciprocating stroke of the engagement frame 34, and from this position the engagement frame 36, that is, the electric cylinder 32 is set to the rod retracting drive state,
Is moved in a direction away from the screen 10, as shown in FIG.
And the arm 18 is engaged with the arm 18 via the scraper 38, whereby the arm 18 rotates and the rake 20 swings in a direction away from the screen 10. And conversely,
When the engagement frame 36 is advanced, that is, the electric cylinder 32 is switched to the rod protruding drive state, and the engagement frame 3
When the robot 6 is moved in a direction approaching the screen 10, the arm 18 is rotated by its own weight, whereby the rake 20 swings in a direction approaching the screen 10. When the engagement frame 36 is further advanced from the reference position, the rake 2 is moved as described above.
0 engages with the upper end portion of the screen to prevent the rotation of the arm 18, and the engaging frame 36 moves forward relative to the arm 18 as shown in FIG. ing.

The scraper 38 is used for the screen 10
Is a member that removes dust that has been scooped up by the rake 20 along the rake 20. The member is configured to remove dust by moving from the base end to the distal end while in contact with the claw surface (upper surface) of the rake 20. As shown in FIG. 1, when the rake 20 is set at the raised end position and the engagement frame 36 is set at the reference position of the forward / backward stroke, the rake 20 is positioned at the base end of the claw portion of the rake 20. It is provided to be.

In the above-described dust removing apparatus, normally, the dust removing apparatus shown in FIG.
As shown in FIG. 7, the arm 18 is set to the raised end position, and the engaging frame 36 is held at the reference position in the reciprocating stroke, whereby the rake 20 is arranged at the upper end of the screen in the working position. The dust is captured by the screen 10.

Then, by driving the rake 20 at an appropriate time, for example, every day or every week,
To remove the trapped dust.

In this case, first, the electric cylinder 32 is driven from the state shown in FIG.
As shown in FIG. 3A, the rake 20 is moved away from the screen 10 by swinging the arm 18. Then, as shown in FIG. 3B, the motor 26 is driven to rotate forward to lower the arm 18, whereby the rake 20 is disposed near the bottom of the water channel Ws. At this time, since the arm 18 is supported via the roller 40 provided on the engagement frame 36, the roller 18 is rotated as the arm 18 is lowered, so that the arm 18 is smoothly lowered.

Next, the electric cylinder 32 is driven to move the engagement frame 36 forward to dispose it at the reference position, thereby setting the rake 20 to the work position as shown in FIG. 3 (c). Then, the rake 20 is moved upside down along the screen 10 integrally with the arm 18 by inverting and driving the motor 26, and the dust caught thereby is scraped up along the screen 10 by the rake 20.

When the rake 20 is raised to the upper end of the screen 10 (FIG. 4A), the motor 26 is stopped, and the electric cylinder 32 is driven to further advance the engagement frame 36 from the reference position. . In this way, the engagement frame 36 with respect to the arm 18
Move relatively (forward), the scraper 38 moves from the base end of the claw portion of the rake 20 to the front end, and FIG.
(B) As shown in FIG.
While being removed from the upper end of the screen 10 to the outside of the water channel.

After the dust is removed from the rake 20, the engaging frame 36 is reset to the reference position, and the rake 20 is made to stand by at the upper end of the screen as shown in FIG. 1 until the next operation.

As described above, in the above-described dust removing apparatus, the rake 20 is pivotally displaced by driving the engagement frame 36 forward and backward by the electric cylinder 32, and the scraper 38 is integrally attached to the engagement frame 36. Since the dust is removed from the rake 20 by utilizing the advancing and retreating operation of the engagement frame 36 as described above, the scraper 38 is provided without providing a dedicated driving means.
Can be driven to strongly remove dust from the rake 20. Therefore, dust can be appropriately removed from the rake 20, and furthermore, it is possible to respond to requests for simplification of the apparatus and cost reduction.

The dust removing device of the above embodiment is an example of the dust removing device according to the present invention, and its specific configuration can be appropriately changed without departing from the gist of the present invention.

For example, in the above-described dust removing apparatus, the electric cylinder 32 is used as the driving means, and the engagement frame 36 is driven forward and backward by this.
A hydraulic cylinder or an air cylinder may be used instead of 2. Further, the engagement frame 36 may be driven by using a motor as a drive source instead of the cylinder. In this case, for example, a rail extending in the retreating direction of the engagement frame 36 and a ball screw shaft are provided on the fixed frame 14a, and the engagement frame 36 is movably mounted on the rail and screwed to the ball screw shaft. What should I do? In this way, if the ball screw shaft is rotated forward and reverse by the motor, the engaging frame 36 advances and retreats along the rail.
6 can be driven forward and backward. However, in this case, since a configuration for converting the rotational motion of the motor into a linear motion, such as a rail and a ball screw, is required as described above, the above-described configuration in which the engagement frame 36 is merely connected to the electric cylinder 32 is required. The configuration of the device is more complicated than that of the device. Therefore, in order to simplify the device configuration, it is advantageous to operate the engagement frame 36 by the electric cylinder 32 as in the device of the above embodiment.

Since the scraper 38 is an elongated member, the scraper 38 may be twisted during operation. Therefore, a guide means for preventing this may be provided. More specifically, as shown in FIG. 5, rods 44 extending in the forward and backward directions of the engagement frame 36 are attached to both longitudinal ends of the scraper 38, and the rods 44 are guided by guides 46 provided on the fixed frame 14a. You may do so. By guiding both ends of the scraper 38 in this manner, the twisting of the scraper 38 can be effectively prevented, and the scraper 38 can be operated properly. The number of guide points in the scraper 38 is arbitrary, and of course,
One or three or more locations may be provided, and the scrapers 38 may be appropriately provided so as to prevent twisting of the scraper 38 and to operate the scraper 38 in a well-balanced and smooth manner.

In the above embodiment, the arm 18
Is rotated about the shaft body 16 by its own weight, and a part of the rake 20 is engaged with the upper end portion of the screen.
0 is constrained to the above-described working position. For example, a part of the arm 18 or the rake 20 is fixed to the fixed frame 14.
The rake 20 may be restrained at the above-mentioned working position by preventing the rotation of the arm 18 by engaging with the a.

As shown in FIG. 6 (a), an inverted-shaped engagement frame 50 is provided, and this engagement frame 50 is turned around the fixed frame 14a by a shaft 52 extending in the width direction at the bent portion. Movably supported, engaging frame 50
Is rotatably connected to the tip of the rod 34 of the electric cylinder 32, and a guide roller 56 and a scraper 54 which contact the arm 18 at the lower end of the engagement frame 50.
May be provided.

According to such a configuration, the electric cylinder is moved from the state where the rake 20 is set at the working position and the roller 56 of the engaging frame 50 is in contact with the frame 18 (the state shown by the solid line in FIG. 6). When the rod 32 is in the rod retracting drive state, the engagement frame 50 rotates around the shaft 52 as shown by the one-dot chain line in FIG.
The lower end of the engagement frame 50 is engaged with the arm 18 via the arm, whereby the arm 18 rotates and the rake 20 swings in a direction away from the screen 10.

When the engagement frame 50 is set at the position shown by the solid line in FIG. 6 and the electric cylinder 32 is set in the rod protruding drive state from the state where the rake 20 is arranged at the rising end position, FIG. As shown in FIG. 7, the engagement frame 50 rotates in the opposite direction to the above, and the lower end of the engagement frame 36 moves relative to the arm 18. As a result, the scraper 54 moves from the base end to the tip end of the claw portion of the rake 20, and dust is removed from the rake 20 by the scraper 54.

Therefore, the same effects as those of the above-described embodiment can be obtained by such a structure. In addition,
In the configuration shown in FIG. 1, the entire engagement frame 36 functions as the engagement member of the present invention, but in the configuration shown in FIG. 6, the lower end of the engagement frame 50 functions as the engagement member.

[0040]

As described above, the present invention relates to a dust removing apparatus having a rake at the tip of an arm supported so as to be able to swing and move forward and backward, and an engaging member capable of moving forward and backward in the direction of swinging the arm; A drive means for driving the engaging member forward and backward is provided, and a removing member for removing the scraped dust from the rake is provided integrally with the engaging member, and when the engaging means is driven forward and backward by the driving means, the arm is accordingly actuated. Is rockingly displaced, and in a state where the rake is held at a predetermined height position, the removing member moves along the claw surface of the rake, thereby removing the scraped dust from the rake. Therefore, the dust raked up by the rake can be strongly removed without providing a dedicated means for driving the removing member. Therefore, the work of removing dust from the rake can be performed smoothly, and it is possible to meet the demand for simplification of the apparatus or cost reduction.

In particular, in the above-mentioned device, it is possible to adopt a configuration in which a cylinder is provided as a driving means, and the engaging member is connected to a piston rod of the cylinder. Can be driven forward and backward.

By providing a guide means for guiding the removing member in the direction of movement of the engaging member, twisting of the removing member can be prevented, and the removing member can be operated smoothly.

Further, if a guide roller for guiding the arm is provided at a portion where the arm is engaged with the arm, the arm can be moved up and down smoothly even when the engaging member is engaged with the arm. .

[Brief description of the drawings]

FIG. 1 is a sectional view showing a dust removing apparatus according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1 showing a configuration of an engagement frame.

FIG. 3 is a diagram illustrating the operation of the rake device.

FIG. 4 is a diagram illustrating the operation of the rake device.

FIG. 5 is a view corresponding to FIG. 2, showing another configuration of the engagement frame.

FIG. 6 is a view corresponding to FIG. 1 showing another example of the dust removing apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Screen 12 Main body 14a Fixed frame 14b Swing frame 18 Arm 20 Rake 22 Pinion 26 Motor 32 Electric cylinder 34 Cylinder rod 36 Engagement frame 38 Scraper Ws Waterway

Claims (4)

(57) [Claims] A rake is provided at the tip of an arm supported so as to be able to swing and ascend and descend so as to scoop up dust trapped by a screen, and the swing of the arm causes the rake to approach the screen. A dust removing device configured to move the rake up and down along the screen by raising and lowering the arm while displacing the position and a position away from the screen; Drive means for driving the engaging member forward and backward in the swinging direction of the arm, a removing member for removing the scraped dust from the rake is provided integrally with the engaging member, and the engaging member is moved to a predetermined position of the forward and backward strokes. When placed in the reference position, the rake is placed in the above working position,
When the engaging member is retracted from the reference position, the engaging member is engaged with the arm to displace the arm in a direction in which the rake is separated from the screen, while when the engaging member is advanced from the reference position, the engaging member is engaged. The engaging member, the removing member, and the driving means are configured so that the member is displaced relative to the arm and the removing member moves from the base end to the tip of the claw portion of the rake. Dust removal device. 2. The dust removing device according to claim 1, wherein a cylinder is provided as the driving means, and the engaging member is connected to a piston rod of the cylinder. 3. A guide means for guiding the removing member in the direction of movement of the engaging member.
Or the dust removing device according to 2. 4. The dust removal apparatus according to claim 1, wherein a guide roller for guiding the arm is provided on the engagement member.