JPH10237849A - Rake rocking type dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the dropping speed of a wiper it returns to an operation starting position. SOLUTION: A rake rocking type dust collector includes a screen placed in a channel to block a remainder; a chain placed parallel to the screen and made to travel on a path of travel while describing a circling orbit; a rake secured to the chain to scrape the remainder stuck to the screen; a wiper 75 supported in a predetermined position on the path of travel in such a way as to rock freely between an operation starting position and an operation ending position and rocked as the rake moves, to remote the remainder stuck to the rake; and a shock absorber 80 producing a frictional force as the wiper 75 rocks. Therefore, the dropping speed of the wiper 75 when it returns to the operation starting position can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rake swing type dust removing machine.

[0002]

2. Description of the Related Art Conventionally, sedimentation basins, drainage stations,
In facilities such as agricultural irrigation canals and sedimentation basins of water purification plants, various automatic dust removers are provided to remove dirt and dirt from the water. Of these, the front scraping type automatic dust remover is most frequently used.

FIG. 2 is a side view of a main part of a conventional front-hand-lifting type automatic dust remover. In the figure, 11 is an automatic dust remover, 12 is a water channel in which a water flow is formed in the direction of arrow A, and 13 is the water channel 12
It is a screen that is arranged at an angle to the surface of the screen and blocks and blocks trash such as dust and contaminants in water. The waterway 1
On the upstream side of the screen 13 in 2, two chains 14 are arranged in parallel with the screen 13 and at an angle so as to face the front surface of the screen 13.
The chain 14 is connected to sprockets 21 and 22.
By driving a motor (not shown) to rotate the sprocket 21, the sprocket 21 is caused to travel along the field track-shaped travel path 55 in the direction of arrow B.

A plurality of attachments 16 are provided at a plurality of positions in the length direction of the chain 14 at a constant interval from each other, and the rake unit 51 swings with respect to the chain 14 via the attachments 16. Freely supported. The rake unit 51 includes left and right rake side plates 17 rotatably supported by the respective chains 14 via the attachments 16, and the respective rake side plates 17.
A connecting member (not shown) for connecting between the rake side plates 1
7, a rake 18 having a plurality of rake claws (not shown) protruding radially outward, and each of the rake side plates 1
7, rollers 23, 2 rotatably arranged at both ends
Consists of four.

A linear roller guide 52 connecting the sprockets 21 and 22 is provided on the inner peripheral side of the traveling path 55, and a field track-shaped roller guide 53 is provided on the outer peripheral side of the traveling path 55. The rollers 23 and 24 are guided by the respective roller guides 52 and 53. Therefore, the rake unit 51 is moved as the chain 14 travels, and the rake 18 is raised along the screen 13, so that the residue adhering to the screen 13 can be scraped off. At a predetermined position on the traveling path 55 on the upstream side of the sprocket 21, a spill drop position P1 for dropping the scum scooped up by the rake 18 is set. Unit 5
1 is rotated. At this time, the residue adhering to the rake 18 along with the frying falls naturally onto a conveyor (not shown) and is discharged as the conveyor runs.

For this purpose, the roller guide 52 has
A concave portion 56 for deflecting the roller 23 inward at the residue drop position P1 is formed. In the automatic dust remover 11 configured as described above, when the motor is driven to rotate the sprocket 21 and run the chain 14, the rake unit 51 is moved. After passing through the sprocket 22, the rake unit 51 is moved upward along the screen 13 and
The residue adhering to 3 is scooped up by a rake 18.

Subsequently, when the rake unit 51 reaches the residue drop position P1, the roller 23 is guided by the concave portion 56 and is deflected inward, and accordingly, the rake unit 51 is moved clockwise in FIG. Rotated. At this time, the residue adhering to the rake 18 falls naturally on the conveyor. In addition, assuming that it is difficult to drop the residue naturally, there is also provided a device in which an external wiper (not shown) is provided to forcibly unload the residue.

However, in the automatic dust remover 11, when an obstacle such as sand or wood exists near the lower end of the screen 13, the rake unit 51 moving along the sprocket 22 moves near the lower end of the screen 13. When it reaches, bite between the rake 18 and the obstacle
This causes the chain 14 to lock and become inoperable.

In view of the above, there is provided a rake swing type dust remover in which no bite occurs between the rake 18 and an obstacle near the lower end of the screen 13. FIG. 3 is a sectional view of a main part of a conventional rake swing type dust remover. In the figure, 61 is an automatic dust remover, 12 is a water channel in which a water flow is formed in the direction of arrow A, and 13 is a screen.

On the upstream side of the screen 13 in the water channel 12, two chains 14 are provided in parallel with the screen 13 so as to face the front surface of the screen 13, and
It is arranged at an angle. And the chain 14 is
It is installed between the sprockets 21 and 22 and drives a motor (not shown) to rotate the sprocket 21, whereby the field track-shaped travel path 55 can travel in the direction of arrow B.

A plurality of attachments 66 are provided at a plurality of positions in the length direction of the chain 14 at a constant interval from each other, and the rake unit 62 swings with respect to the chain 14 via the attachments 66. Freely supported. The rake unit 62 includes left and right rake side plates 67 rotatably supported by the respective chains 14 via attachments 66, and the respective rake side plates 67.
A connecting member (not shown) for connecting between the rake side plates 6
7, a rake 18 having a plurality of rake claws (not shown) projecting radially outward, and each of the rake side plates 6
7, rollers 68, 6 rotatably disposed at both ends.
Consists of nine. In this case, the attachment 66
And the roller 69 are disposed on the same axis.

An inverted "U" -shaped roller guide 72 connecting the sprockets 21 and 22 is provided on the inner peripheral side of the traveling path 55, and a field track-shaped roller guide is provided on the outer peripheral side of the traveling path 55. Guides 73 are provided, respectively, and the rollers 68, 6 are
9 is guided. In the automatic dust remover 61 having the above configuration,
When the motor is driven to rotate the sprocket 21 and run the chain 14, the rake unit 62 is moved. Then, after passing through the sprocket 22, the rake unit 62 is moved upward along the screen 13, and the residue adhered to the screen 13 is scraped up by the rake 18.

Since the rake unit 62 is configured to swing about the attachment 66, the center of swing of the rake unit 62 is different from the center of gravity. Therefore, in order to prevent the rake unit 62 from overturning during the lowering process of the chain 14, rollers are provided on the inner peripheral side and the outer peripheral side of the traveling path 55, respectively, except for the sprocket 22 in the traveling path 55. Guides 72 and 73 are provided. On the other hand, since the rake unit 62 does not fall over at the sprocket 22 in the traveling path 55, the roller guide 72 is not provided on the inner peripheral side of the traveling path 55, and The roller guide 73 is disposed only on the outer peripheral side of the roller guide 73.

Therefore, during normal operation, the roller 68 following the roller 69 is under its own weight and is
The rake unit 6 moves along the sprocket 22 when there is an obstacle such as sand or wood near the lower end of the screen 13.
When 2 reaches the vicinity of the lower end of the screen 13, the rake side plate 67 rotates clockwise to avoid an obstacle. As a result, it is possible to prevent the rake 18 from being caught between the obstacle and the obstacle, so that the chain 14 is prevented from being locked and becoming inoperable.

However, since the center of gravity of the rake unit 62 is located on the upstream side (rearward) of the swing center in the movement direction of the rake unit 62, the rake unit 62 cannot be rotated by gravity. Therefore, the residue adhering to the rake 18 due to the frying cannot be dropped naturally. Therefore, at a predetermined position on the traveling path 55 on the upstream side of the sprocket 21, a residue drop position P2 for dropping the residue scraped by the rake 18 is set, and the wiper 75 is moved to the residue drop position P2. Are arranged. The wiper 75 is swingably disposed, and has an arm 77 supported by a shaft 76 and a wiper attached to a tip of the arm 77 to rub (rub) the surface of the rake 18 with the rotation of the arm 77. It consists of a blade 78. The wiper 75 is swung between an operation start position PS1 and an operation end position PS2 shown in the figure, and a stopper (not shown) is provided at the operation start position PS1 so as not to rotate the arm 77 further clockwise. Is arranged.

When the rake unit 62 reaches the residue drop position P2 as the chain 14 travels,
The wiper blade 78 hits one end of the rake 18,
Thereafter, as the rake unit 62 moves upward, the arm 77 is rotated counterclockwise,
The wiper blade 78 is moved by sliding on the rake 18. As a result, the residue adhering to the rake 18 is scraped off by sliding of the wiper blade 78, falls naturally on a conveyor (not shown), and is discharged as the conveyor runs.

Thereafter, when the rake unit 62 further moves upward, the wiper 75 reaches the operation end position PS2, the tip of the wiper blade 78 comes off the rake 18, and the wiper 75 rotates clockwise by gravity. And returns to the operation start position PS1.

[0018]

However, in the conventional rake swing type dust remover, the wiper blade 7
Since the rotation of the arm 77 ends when the tip of the arm 8 comes off the rake 18, the displacement amount of the wiper 75 during operation, that is, the swing angle of the arm 77 is large.

Therefore, after the residue is scraped off, the falling speed when the wiper 75 returns to the operation start position PS1 due to gravity is high, and an impact sound when the stopper and the wiper 75 collide at the operation start position PS1. Increases or vibration occurs. Therefore, in order to reduce the falling speed when the wiper 75 returns to the operation start position PS1, a damper such as a hydraulic cylinder or an air cylinder (not shown) is provided, and the kinetic energy when returning to the operation start position PS1 is reduced by the damper. It is conceivable to absorb the kinetic energy. However, when the damper is used, the kinetic energy of the wiper 75 is absorbed by the damper performing the linear motion, so that the number of movable parts increases and the structure becomes complicated.

The present invention solves the problems of the conventional rake swing type dust remover, and provides a rake swing type dust remover capable of reducing the falling speed when the wiper returns to the operation start position. The purpose is to:

[0021]

In order to achieve the object, a rake swing type dust remover according to the present invention is provided in a waterway, a screen for closing up the residue, and a screen arranged in parallel with the screen to provide a running path. And a rake fixed to the chain to scoop up the residue adhering to the screen, and at a predetermined position on the traveling path, between an operation start position and an operation end position. Swingably supported, oscillated with the movement of the rake,
The wiper has a wiper for removing the residue adhering to the rake, and a shock absorber for generating a frictional force as the wiper swings.

[0022]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 4 is a sectional view of a main part of the rake swing type dust remover according to the embodiment of the present invention. In the figure, 61 is an automatic dust remover, 12 is a water channel in which a water flow is formed in the direction of arrow A, and 13 is a bottom surface 1 of the water channel 12.
The screen is arranged to be inclined with respect to 2a, and blocks the residue such as dust and contaminants in the water.

On the upstream side of the screen 13 in the water channel 12, two chains 14 are arranged facing the front surface of the screen 13 in parallel with the screen 13, and
It is arranged at an angle. And the chain 14 is
It is installed between the sprockets 21 and 22, and by rotating the sprocket 21 by a motor (not shown),
The vehicle is caused to travel in a direction indicated by an arrow B along a trajectory along a field track-shaped travel path 55.

A plurality of attachments 66 are provided at a plurality of positions in the length direction of the chain 14 at regular intervals, and the rake unit 62 swings with respect to the chain 14 via the attachments 66. Freely supported. The rake unit 62 includes left and right rake side plates 67 rotatably supported by the respective chains 14 via attachments 66, and the respective rake side plates 67.
A connecting member (not shown) for connecting between the rake side plates 6
7, a rake 18 having a plurality of rake claws (not shown) projecting radially outward, and each of the rake side plates 6
7, rollers 68, 6 rotatably disposed at both ends.
Consists of nine. In this case, the attachment 66
And the roller 69 are disposed on the same axis.

An inverted "U" -shaped roller guide 72 connecting the sprockets 21 and 22 is provided on the inner peripheral side of the traveling path 55, and a field track-shaped roller guide is provided on the outer peripheral side of the traveling path 55. Guides 73 are provided, respectively, and the rollers 68, 6 are
9 is guided. In the automatic dust remover 61 having the above configuration,
When the motor is driven to rotate the sprocket 21 and run the chain 14, the rake unit 62 is moved. Then, after passing through the sprocket 22, the rake unit 62 is moved upward along the screen 13, and the residue adhered to the screen 13 is scraped up by the rake 18.

Since the rake unit 62 is swingable about the attachment 66, the swing center of the rake unit 62 is different from the center of gravity. Therefore, in order to prevent the rake unit 62 from overturning during the lowering process of the chain 14, rollers are provided on the inner peripheral side and the outer peripheral side of the traveling path 55, respectively, except for the sprocket 22 in the traveling path 55. Guides 72 and 73 are provided. On the other hand, since the rake unit 62 does not fall over at the sprocket 22 in the traveling path 55, the roller guide 72 is not provided on the inner peripheral side of the traveling path 55, and The roller guide 73 is disposed only on the outer peripheral side of the roller guide 73. That is, the roller guide 72 is connected to the sprockets 21 and 22.
Linear portions 72a, 72c extending between the sprocket 2
The roller guide 73 includes linear portions 73a and 73c extending between the sprockets 21 and 22, a semicircular portion 73b extending along the outer periphery of the sprocket 21, and a semicircular portion 73b extending along the outer periphery of the sprocket 21. It has a semicircular portion 73d extending along.

Therefore, during normal operation, the roller 68 following the roller 69 is under its own weight and is
The rake unit 6 moves along the sprocket 22 when there is an obstacle such as sand or wood near the lower end of the screen 13.
When 2 reaches the vicinity of the lower end of the screen 13, the rake side plate 67 rotates clockwise to avoid an obstacle. As a result, it is possible to prevent the rake 18 from being caught between the obstacle and the obstacle, so that the chain 14 is prevented from being locked and becoming inoperable.

However, since the center of gravity of the rake unit 62 is located on the upstream side (rearward) of the swing center in the moving direction of the rake unit 62, the rake unit 62 cannot be rotated by gravity. Therefore, the residue adhering to the rake 18 due to the frying cannot be dropped naturally. Therefore, at a predetermined position on the traveling path 55 on the upstream side of the sprocket 21, a residue drop position P2 for dropping the residue scraped by the rake 18 is set, and the wiper 75 is moved to the residue drop position P2. Are arranged. The wiper 75 includes an arm 77 supported on a shaft 76 and a wiper blade 78 attached to the tip of the arm 77 and rubbing the surface of the rake 18 with the rotation of the arm 77. . The wiper 75 is swung between an operation start position PS1 and an operation end position PS2 shown in the figure. Is arranged.

When the rake unit 62 reaches the residue drop position P2 as the chain 14 travels,
The wiper blade 78 hits one end of the rake 18,
Thereafter, as the rake unit 62 moves upward, the arm 77 is rotated counterclockwise,
The wiper blade 78 is moved by sliding on the rake 18. As a result, the residue adhering to the rake 18
It is scraped off by the sliding of the wiper blade 78, falls naturally on a conveyor (not shown), and is discharged as the conveyor runs.

Thereafter, when the rake unit 62 moves further upward, the wiper 75 reaches the operation end position PS2, the tip of the wiper blade 78 comes off the rake 18, and the wiper 75 rotates clockwise by gravity. And returns to the operation start position PS1. By the way, if the falling speed at which the wiper 75 returns to the operation start position PS1 due to gravity after the residue is scraped off is high, the impact sound when the stopper and the wiper 75 collide at the operation start position PS1 increases. Would.

Therefore, the wiper 75 is moved to the operation start position PS1.
In order to lower the falling speed when returning to
A shock absorber is provided on a bearing portion (not shown) of the reference numeral 7. FIG. 1 is a schematic diagram of a shock absorber according to an embodiment of the present invention.
In the figure, 75 is a wiper, 76 is a shaft, 77 is an arm, 78 is a wiper blade, and 80 is a shock absorber that generates a frictional force as the wiper 75 swings. The arm 77 is rotatably supported by a bearing 43 fixed to a bearing bracket 44, and the bearing bracket 44 is fixed to a casing 45.

A hub 46 is fixed to an end of the shaft 76 via a key 47. The hub 46 is formed of a sleeve portion 46a and a flange portion extending radially outward from one end of the sleeve portion 46a. 46b. Then, the annular friction member 48, the annular plate 49, and the disc spring 91 are successively externally fitted to the sleeve portion 46a, and are regulated in the axial direction by the adjusting nut 92. The portion of the annular friction member 48 that contacts the flange 46 b and the annular plate 49 is formed of a friction material, and is fixed to the bracket 93 via the torque arm 50. By rotating the adjusting nut 92 with respect to the hub 46, the annular friction member 48 and the flange portion 46b are rotated.
And the frictional force generated between the ring and the annular plate 49 can be adjusted. The bracket 93 is fixed to the casing 45. Reference numeral 54 denotes a plain bearing. When the capacity of the plain bearing 54 is increased, the bearing 43 can be omitted. further,
When the plain bearing 54 is a cam clutch mechanism, it is possible to prevent a friction force from being generated when the wiper 75 rotates from the operation start position PS1 (FIG. 4) to the operation end position PS2.

In the shock absorber 80 having the above-described structure, when the rake unit 62 is moved upward in FIG. 4 by receiving power from the chain 14, the arm 77 is rotated counterclockwise. Thereafter, when the rake unit 62 moves further upward, the wiper 75 reaches the operation end position PS2, the tip of the wiper blade 78 comes off the rake 18, and the wiper 75 is rotated clockwise by gravity, The operation returns to the operation start position PS1 due to gravity.

At this time, the falling speed when the wiper 75 returns to the operation start position PS1 can be reduced by the frictional force generated between the annular friction member 48, the flange 46b, and the annular plate 49. Start position P
The impact sound, vibration, and the like generated in S1 can be suppressed. Further, since there is no need to use a damper such as a hydraulic cylinder or an air cylinder, the number of movable parts can be reduced, and the structure can be simplified.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.

[0036]

As described above in detail, according to the present invention, in a rake swing type dust remover, a screen disposed in a water channel to block residue and a screen disposed in parallel with the screen. A chain that is made to travel along a trajectory along a traveling path, a rake that is fixed to the chain and scoops up the residue adhering to the screen, and an operation start position and an operation end position at predetermined positions on the traveling path. And a wiper that swings with the movement of the rake and removes the residue adhering to the rake, and a buffer that generates a frictional force with the swing of the wiper. Device.

In this case, the rake is moved as the chain travels, and scrapes off the residue adhering to the screen. Thereafter, when the rake reaches the residue dropping position, the wiper removes the residue attached to the lake. Further, when the rake moves and the wiper reaches the operation end position, the wiper returns to the operation start position by gravity. At this time, since the frictional force is generated by the shock absorber, the falling speed when the wiper returns to the operation start position can be reduced, and the impact sound, vibration, and the like generated at the operation start position can be suppressed. .

Since there is no need to use a damper such as a hydraulic cylinder or an air cylinder, the number of movable parts can be reduced, and the structure can be simplified.

[Brief description of the drawings]

FIG. 1 is a schematic view of a shock absorber according to an embodiment of the present invention.

FIG. 2 is a side view of a main part of a conventional front-hand-raising automatic dust remover.

FIG. 3 is a sectional view of a main part of a conventional rake swing type dust remover.

FIG. 4 is a sectional view of a main part of the rake swing type dust remover according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Waterway 13 Screen 14 Chain 18 Rake 55 Runway 61 Automatic dust remover 75 Wiper 80 Buffer device PS1 Operation start position PS2 Operation end position

Claims (1)

[Claims] (A) a screen arranged in a waterway to block residue, and (b) a chain arranged in parallel with the screen and run along a traveling path along a traveling path. c) a rake fixed to the chain for scooping up the residue adhering to the screen, and (d) swingably supported between an operation start position and an operation end position at a predetermined position on the traveling path, A wiper that is swung with the movement of the rake to remove residue adhering to the rake, and (e) a shock absorber that generates a frictional force as the wiper swings. Rake swing type dust remover.