JP3666199B2 - Filter dust remover - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a device that shakes off dust adhering to a filter in a cleaning vehicle or the like.
[0002]
[Prior art]
Conventionally, the following dust removing devices are known.
First conventional example: An apparatus in which a vibration generator is installed at the center of a filter cover, and a vibration transmission member is interposed between the vibration generator and the filter (Japanese Patent Laid-Open No. 3-146109).
Second conventional example: A filter is slidably supported on the mounting portion, a vibration generator is installed on the surface of the filter, the entire filter is repeatedly slid with vibration energy, and is struck against the mounting portion (Japanese Patent Laid-Open No. Hei 5-). 154320).
Third conventional example: A device for rotating and moving a brush in contact with a filter to scrape off dust (Japanese Patent Laid-Open No. Hei 5-161815).
[0003]
[Problems to be solved by the invention]
However, the conventional dust removal device has the following problems.
First conventional example: vibrations are not easily transmitted to the entire area of the filter, dust is likely to remain in the corners, and the center of the filter may be damaged early.
Second conventional example: The support structure of the filter is complicated, the sliding part and the contact part are easily damaged by wear, and not only a loud noise is generated, but also the vibration energy is wasted for sliding the filter.
Third conventional example: A complicated brush driving mechanism is required, and the manufacturing cost of the apparatus is high, and the filter is easily damaged by the contact of the brush.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide a simple and excellent apparatus capable of efficiently exciting the entire filter and reliably shaking off dust.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problem, the dust removing device of the present invention rotatably supports the vibration generator on a support body separated from the filter, and the vibration generator is provided with an excitation unit that applies vibration to the filter. The vibration generator is oscillated by the repulsive force of the filter, and the filter is configured to be repeatedly struck by a vibration unit (claim 1).
[0006]
Further, in the dust removal apparatus of the present invention, the excitation unit is provided in the vicinity of the position of the center of gravity of the vibration generator so that high-energy vibration can be generated by effectively using the weight of the vibration generator. .
[0007]
Further, in order to largely swing the vibration generator by the repulsive force of the filter, a shaker motor is installed in the vibration generator to vibrate the excitation portion in a direction substantially perpendicular to the contact surface of the filter.
[0008]
In this case, it is preferable to provide a stopper for holding the filter at a fixed position on the opposite side of the vibration portion so as to suppress the loss of vibration and tapping energy.
[0009]
In order to improve the durability of the apparatus, it is desirable to provide an anti-vibration rubber at the rotation fulcrum of the vibration generator so that vibration wear does not occur at the attachment portion of the vibration generator.
[0010]
In particular, in order to improve the dust removal efficiency of the filter installed in the cleaning vehicle, the dust removing device of the present invention is a cleaning vehicle provided with a filter in the upper part of the hopper chamber, and the ceiling wall of the hopper chamber separated from the filter upward. The vibration generator is rotatably supported, and an excitation part that applies vibration to the filter is provided near the center of gravity of the vibration generator. The vibration generator is oscillated by the repulsive force of the filter, and the filter is moved by the excitation part. It is comprised so that it may beat repeatedly (Claim 6).
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the form which carried out the present invention to a road sweeper is described based on a drawing. As shown in FIG. 1, this road surface cleaning vehicle travels on a vehicle body 1, sweeps dust on the road surface with a side brush 2, sweeps it up into a hopper chamber 4 with a main brush 3, and collects the hopper chamber 4. Air is sucked through the duct 6 by the blower 5, dust in the polluted air is removed by the filter 7, and if the dust adheres to the filter 7 and the performance is reduced, the suction from the duct 6 is stopped or weakened. In this state, the dust attached to the filter 7 is shaken off by the dust removing device 8.
[0012]
As shown in FIGS. 2 and 3, a partition wall 10 having a vent hole 10 a is obliquely provided in the upper portion of the hopper chamber 4, and a filter 7 is placed on the partition wall 10 via a rubber packing 11. . The filter 7 has a filter paper 13 stretched inside a rectangular frame 12 covering the vent hole 10a. The frame 12 is sandwiched between the partition wall 10 and the two pressers 14 by bolts 15 and wing nuts 16. It is fixed.
[0013]
The dust removal device 8 includes a vibration generator 18 that excites the filter 7 from the rear side. A bracket 20 for attaching a vibration generator 18 is fixed to the ceiling wall 19 of the hopper chamber 4 that is spaced upward from the filter 7. The vibration generator 18 includes an upward U-shaped frame 21, and the upper end of the frame 21 is rotatably supported by the bracket 20 via an anti-vibration rubber 22. A shaker motor 24 having an eccentric weight 23 and a weight 25 are provided at the lower end of the frame 21, and the center of gravity position of the vibration generator 18 is set near the center of the shaker motor 24.
[0014]
In the vicinity of the center of gravity, a vibration unit 27 for applying high-frequency vibration of the shaker motor 24 to the filter 7 is provided on the lower front surface of the frame 21 so as to contact the rear side surface of the frame body 12 from the vertical direction. Further, a stopper 29 made of a highly rigid material such as a metal for holding the filter 7 at a fixed position is provided on the front wall 28 of the hopper chamber 4 on the opposite side of the vibration unit 27. In the dust removing device 8, the shaker motor 24 vibrates the vibration unit 27 in a direction substantially perpendicular to the contact surface of the filter 7, and the vibration generator 18 is damped by the repulsive force of the filter 7 due to the vibration. The filter 7 is configured to swing in a pendulum shape obliquely back and forth around the center 22, and the filter 7 is repeatedly struck by the vibration unit 27.
[0015]
According to the dust removing device 8 having the above configuration, since the vibration exciter 27 is provided in the vicinity of the center of gravity of the vibration generator 18, the high weight vibration of the vibration generator 18 can be effectively utilized by utilizing the weight of the vibration generator 18. Can act on. Since the shaker motor 24 vibrates the vibration unit 27 in a direction substantially perpendicular to the contact surface of the filter 7, the repulsive force of the filter 7 becomes strong. As a result, the vibration generator 18 swings greatly, and the vibration unit 27 Strike the filter 7 strongly. Since the filter 7 is held at a fixed position by the stopper 29 on the opposite side of the vibration unit 27, the tapping energy is efficiently spread to the filter paper 13 without being wasted on the movement of the filter 7. Therefore, the entire filter 7 can be efficiently excited by the synergistic action of the high-frequency vibration and repeated tapping, and the dust adhering to the filter paper 13 can be reliably shaken off.
[0016]
Further, in this road cleaning vehicle, the dust removal device 8 is configured to excite the filter 7 by external force, so that the filter 7 and the vibration generator 18 are separately installed in the hopper chamber 4. The structure of the filter 7 can be simplified, the vibration generator 18 can be easily assembled, and maintenance such as replacement of the filter paper 13 and inspection of the motor 24 can be easily performed. In addition, since the vibration generator 18 comes into contact with the filter 7 only by the vibration unit 27, the wear location due to vibration can be minimized and the durability of the filter 7 and the vibration generator 18 can be improved. In particular, since the anti-vibration rubber 22 is provided at the rotation fulcrum of the vibration generator 18, vibration wear at the mounting portion of the vibration generator 18 can be prevented in advance.
[0017]
4 and 5 show another embodiment of the dust removal apparatus according to the present invention. The same reference numerals as those in FIG. In the dust removing device 8 shown in FIG. 4, the vibration generator 18 is installed above the filter 7, and the upper end of the frame 21 is rotatably supported by the bracket 20 of the ceiling wall 19 via the vibration isolating rubber 22. Yes. The frame 21 is provided with a shaker motor 24 having an eccentric weight 23 and a weight 25, and the position of the center of gravity of the vibration generator 18 is set slightly below the center of the shaker motor 24.
[0018]
Near the position of the center of gravity, a vibration unit 27 is provided at the lower end of the frame 21 to apply high-frequency vibration of the shaker motor 24 to the filter 7 through the metal 31. The metal 31 is fixed to the presser foot 14 of the filter 7 with bolts 32, and the shaker motor 24 vibrates the vibration portion 27 in a direction substantially perpendicular to the contact surface of the metal 31 and vibrates by a repulsive force from the filter 7 side. The generator 18 swings up and down around the vibration isolating rubber 22, and the excitation unit 27 is configured to repeatedly strike the central part of the metal 31. Note that the frame 21 is rotatably supported by the vibration isolating rubber 22 at the rear end of the upper bent portion 21a in order to bring the vibration portion 27 into contact with the metal 31 substantially perpendicularly.
[0019]
Therefore, also with this dust removing device 8, as in the previous embodiment, the entire filter 7 is efficiently excited by the synergistic action of high frequency vibration and repeated tapping, and dust attached to the filter paper 13 is reliably shaken off. Can do. However, in the case of this embodiment, since a part of vibration and tapping energy is absorbed by the rubber packing 11 between the filter 7 and the partition wall 10, the output of the vibration generator 18 needs to be set slightly higher. .
[0020]
In the dust removing device 8 shown in FIG. 5, the vibration generator 18 is rotatably supported on the bracket 20 of the ceiling wall 19 via a pin 34 at the rear end of the frame 21. The filter 7 is disposed below the partition wall 10 via a rubber packing 11 and is fixed between the partition wall 10 and the stopper 29 by a bolt 15 and a wing nut 16. On the upper surface of the filter 7, a presser foot 14 and an abutment 31 are arranged vertically and horizontally, and are fixed to the stopper 29 with a bolt 35 and a wing nut 36. The vibration unit 27 of the vibration generator 18 contacts the central portion of the metal 31 from a substantially vertical direction so that the filter 7 synergizes with the high frequency vibration and repeated tapping.
[0021]
According to this configuration, since the rubber packing 11 is provided on the vibration unit 27 side of the filter 7, unlike the apparatus of FIG. 4, there is no possibility that vibration and tapping energy is attenuated by the rubber packing 11. Further, since the filter 7 is held at a fixed position by the stopper 29 on the opposite side of the vibration unit 27, the filter 7 can be efficiently spread over the entire area of the filter paper 13 without wasting vibration and tapping energy. There is an advantage that the dust removing effect can be improved in the dust removing device 8 of the type provided with the generator 18 above the filter 7.
[0022]
In addition, this invention is not applied only to a road surface cleaning vehicle, It can also be applied to the dust removal apparatus of the filter in various machines which process granular materials, such as a dust collector and a milling machine. Further, in the road cleaning vehicle, it is possible to appropriately change the shape and configuration of each part without departing from the spirit of the present invention, such as attaching a vibration generator to the rear wall of the hopper chamber.
[0023]
【The invention's effect】
As described above in detail, according to the first aspect of the present invention, the vibration is applied to the filter from the outside by the vibration generator of the vibration generator, the vibration generator is swung by the repulsive force of the filter, and the filter is rotated by the vibration section. In this way, the entire filter can be excited efficiently, dust can be reliably shaken off, and the apparatus can be configured easily and robustly.
[0024]
According to the second aspect of the present invention, since the excitation unit is provided in the vicinity of the center of gravity position of the vibration generator, there is an effect that high energy vibration can be generated by effectively utilizing the own weight of the vibration generator.
[0025]
According to the invention of claim 3, the shaker motor vibrates the vibration portion in a direction substantially perpendicular to the contact surface of the filter. Therefore, the repulsive force of the filter is strengthened, the vibration generator is greatly swung, and the filter is moved. There is an effect that can be beaten strongly.
[0026]
According to the fourth aspect of the present invention, the filter is held at a fixed position by the stopper on the opposite side of the vibrating portion, so that it is possible to suppress the loss of vibration and tapping energy.
[0027]
According to the fifth aspect of the present invention, since the anti-vibration rubber is provided at the rotation fulcrum of the vibration generator, there is an effect that vibration wear at the mounting portion of the vibration generator can be prevented.
[0028]
According to the invention of claim 6, since the vibration generator is rotatably supported on the ceiling wall of the hopper chamber away from the filter in the cleaning vehicle, the filter and the vibration generator are separately installed in the hopper chamber. The filter structure can be simplified, the vibration generator can be easily assembled, and the maintenance can be facilitated.
[Brief description of the drawings]
FIG. 1 is a cutaway side view of an essential part of a road cleaning vehicle showing an embodiment of the present invention.
2 is a cross-sectional view of a hopper chamber showing a filter dust removing device in the cleaning vehicle of FIG. 1. FIG.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
FIG. 4 is a cross-sectional view of a hopper chamber showing another embodiment of the dust removing device.
FIG. 5 is a cross-sectional view of a hopper chamber showing still another embodiment of the dust removing device.
[Explanation of symbols]
4 .. Hopper chamber, 7 .. Filter, 8 .. Dust removal device, 18 .. Vibration generator, 19 .. Ceiling wall, 22 .. Anti-vibration rubber, 24 .. Shaker motor, 27. 29. Stopper.

Claims (6)

A vibration generator is rotatably supported on a support body away from the filter, and a vibration generator that applies vibration to the filter is provided in the vibration generator. The vibration generator is swung by the repulsive force of the filter, and the vibration generator A filter dust removal device configured to repeatedly strike a filter. The filter dust removing device according to claim 1, wherein the excitation unit is provided in the vicinity of the center of gravity of the vibration generator. The filter dust removing device according to claim 1 or 2, wherein a shaker motor that vibrates the excitation unit in a direction substantially perpendicular to the contact surface of the filter is installed in the vibration generator. The filter dust removing device according to claim 3, further comprising a stopper for holding the filter in a fixed position on the opposite side of the vibration unit. 5. A dust removing device for a filter according to claim 1, wherein a vibration proof rubber is provided at a pivot point of the vibration generator. In a cleaning vehicle equipped with a filter at the top of the hopper chamber, the vibration generator is pivotally supported on the ceiling wall of the hopper chamber, which is spaced upward from the filter, and the vibration generator that applies vibration to the filter has a center of gravity of the vibration generator. A filter dust removing device provided near a position, wherein the vibration generator is swung by the repulsive force of the filter, and the filter is repeatedly struck by a vibrating portion.

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