JP2000237519A - Dust collecting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily dislodge the dust on a filter cloth surface and to improve the efficiency of dust removal work by disposing a dust removing element in a position where this element engages a peak part disposed at the filter cloth and bringing a rotating member having the dust removing element into contact with the filter cloth surface. SOLUTION: The lower end face of the filter cloth 13 is fixed to the base surface 16 of a cylinder-shaped frame by an adhesive 17. The upper end face thereof is fixed to an annular member 18 by the adhesive 17. The annular member 18 is fixed to the frame of the cylindrical shape by means of screws 19, etc. The base surface 16 of the frame is provided with a projecting part 20 and a handle 21 is pivotally supported atop the projecting part 20 rotatably around a central shaft 15 of the cylindrical and comes into contact with the inside surface of the filter cloth 13. The handle 21 is provided with the dust removing element 22 for repelling the pleat type peak part of the inside surface of the filter cloth 13. The dust removing element 22 disposed at the front end of the handle 21 repels the peak part of the inside surface of the filter cloth 13 when the handle 21 is rotated and, therefore, the dust sticking to the outside surface of the filter cloth 13 may be dislodged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter device for a dust collector, which is folded in a pleated shape and formed in a cylindrical shape.

[0002]

2. Description of the Related Art A conventional filter device of a portable dust collector will be described with reference to FIGS. A portable dust collector is mainly used for cleaning a floor surface and collecting cutting dust discharged from a power tool or the like. Although there are various types of filter devices provided in the dust collector, the filter devices formed in a cylindrical shape generally have the following structures.

[0003] 1. The filter cloth 30 is folded in a pleated shape and is formed in a cylindrical shape. A disc member 32 is formed on an open surface on one side of the cylinder on a plane substantially perpendicular to the central axis 31 of the cylinder.
The filter filter cloth 30 is hermetically sealed by adhering it with an adhesive 33 or the like, and the other open surface has a ring-shaped member 34 having a hole at the center, and a substantially parallel surface to the disk member 32. And the filter cloth 30 is fixed with an adhesive 33 or the like. The filter device 35 is an intake port of a dust collecting fan 37 formed on a lower surface of a motor case 38 having a motor 36, a dust collecting fan 37, a power cord, and a power switch.
39 is provided so that the hole of the ring-shaped member 34 is located, and a seal packing 40 is disposed on the contact surface between the ring-shaped member 34 and the motor case 38 so that the motor case 38 Filter fixing rib 41 protruding downward
Are detachably fastened via screws. Usually, such a filter device 35 is provided with a perforated iron plate 43 or a wire mesh formed in a cylindrical shape inside the filter filter cloth 30 in order to keep the shape of the filter filter cloth 30 constant.
43 and the wire mesh are fixed to the disk member 34 and the ring-shaped member 33 by welding or the like.

[0004] 2. The filter cloth 30 is folded in a pleated shape and is formed in a cylindrical shape. A disc member 32 is formed on an open surface on one side of the cylinder on a plane substantially perpendicular to the central axis 31 of the cylinder.
, And both end surfaces of the filter cloth 30 are fixed with urethane rubber 46 or the like. The filter device 35 includes an electric motor 36,
A dust collecting fan 37, a power cord, and a power switch are arranged so that a hole of the filter end face is located at an intake port 39 of the dust collecting fan 37 formed on a lower surface of a motor case 38 having a power switch therein. It is detachably fastened via a screw 42 to a filter fixing rib 41 projecting downward from the case 38. By this fastening, the urethane rubber 46 on the end face of the filter filter cloth 30 is sandwiched between the motor case 38 and the disk member 32, crushed, and sealed. Usually, such a filter device 35 has a perforated iron plate 43 or a wire mesh formed in a cylindrical shape inside the filter filter cloth 30 in order to keep the shape of the filter filter cloth 30 constant. Some of the wire 43 and the wire mesh are fixed to the disk member 34 by welding or the like.

[0005] The filter device 35 such as the above 1 and 2
In the portable dust collector in which the filter device 35 is mounted, the inside of the filter device 35 becomes negative pressure when the dust collection fan 37 directly connected to the electric motor 36 rotates. As a result, dust and air are sucked into the inside of the dust case 44 from the hose mounting suction port 45 provided on the side surface of the dust case 44, and tend to pass through the filter cloth surface. Dust is collected and adhered on the filter cloth surface, and air is separated by passing through the filter cloth surface. As the dust collection operation is continued, dust is formed in a layer on the filter filter cloth surface and becomes clogged. At this time, the pressure difference between the inside and the outside of the filter filter cloth 30 increases, and the force as shown in FIG. The filter cloth 30 receives 47. In order to prevent the filter filter cloth 30 from being curved by the force 47, additional parts such as a perforated iron plate and a wire mesh are supported or supported, or a strong adhesive 33 capable of sufficiently withstanding the force 47,
Alternatively, a large amount of adhesive 33 is used so that no gap is formed between the filter filter cloth 30 and the disk member 32 or the motor case 38. In addition, the conventional filter device 35 removes dust adhering to the surface of the filter
When the motor case 38 is removed from the dust case 44 as shown in FIG. 3, the filter device 35 fastened to the motor case 38 can be taken out, whereby the filter cloth surface of the filter to which the dust has adhered can be exposed. The dust adhering to was washed off. In addition, a vibrator or the like that applies electromagnetic vibration to the filter fixing rib 41 for fastening the filter device 35 is attached to remove dust.

[0006]

If the dust collection operation is continued with the above-mentioned filter device, dust is formed in a layer on the surface of the filter filter cloth and becomes clogged. The outer pressure difference increases, and the filter cloth receives the force as shown in FIG. If parts such as perforated iron plate and wire mesh are not added and supported, this force causes the filter filter cloth to bend as shown in FIG. 7 and in the case of a filter device in which the end face of the filter filter cloth is fixed with urethane rubber,
Due to this curvature, a gap is formed between the filter filter cloth and the disk member or the motor case, and dust leaks therefrom. Further, in the case of a filter device in which the end face of the filter cloth is hardened with an adhesive, a strong adhesive or a large amount of adhesive that can sufficiently withstand this force is required. Also,
The method of removing dust with a brush or the like with the above filter device has the advantage that dust can be removed relatively easily and reliably.However, removing the filter device from the dust case and removing the dust Since the dropping operation (removal operation) is performed, there is a problem that hands and the like become dirty with dust and the dust is scattered around. In addition, the method of vibrating the filter fixing ribs with an electromagnetic exciter and transmitting vibration to the filter cloth surface of the filter device fastened to the filter fixing ribs to remove dust without removing the filter device from the dust case It has the advantage that dust can be removed, so that hands are not stained with dust and dust is not scattered around.However, the filter surface is not directly vibrated, and the dust removal ability is low. And, to add an electromagnetic shaker,
There was a problem that it became relatively expensive.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent a filter filter cloth from being bent, prevent dust from leaking, or reduce the amount of adhesive used, and form a filter filter cloth into a fixed shape without having to hold a filter supporting material. The purpose of the present invention is to remove dust that can be held and adhere to the surface of a filter cloth easily and without scattering it around the dust and without soiling the hands and the like.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to provide a filter filter in which a filter element for directly repelling the filter cloth surface is uniformly applied to the inner peripheral surface of the cylindrical filter filter cloth inside the cylindrical filter filter surface. The filter device is installed so that it can rotate around the axis of the filter, the member provided with this duster contacts the inner surface of the filter, and when the motor case is removed, the filter device remains in the dust case. Is achieved by

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The motor 2 is located inside the motor case 1.
Is disposed so that its output shaft 3 is vertically downward, and the output shaft 3 is provided with a directly connected centrifugal dust collecting fan 4, and the intake port 5 of the dust collecting fan 4 is connected to the lower surface of the motor case 1. Provide at the center. Below the motor case 1, a filter device 6 and a dust case 7 are provided. The outer peripheral portion 8 of the upper surface of the filter device 6 is sandwiched between the seal packing 10 provided on the outer peripheral portion 9 of the lower surface of the motor case 1 and the outer peripheral portion 11 of the upper surface of the dust case 7, and the motor case 1 and the dust case 7 are fastened by a clamp or the like. By doing so, it is pressed and sealed.
The upper surface outer peripheral portion 8 of the filter device 6 has a flat ring shape so that the upper surface outer peripheral portion 11 of the dust case 7 comes into contact, and a rib 12 having an open window on a part of a side surface is provided below the ring-shaped member. A filter frame 13 is formed into a cylindrical shape, and the filter filter cloth 13 is folded in a pleated shape on the inner side of the frame body, and is formed into a cylindrical shape so that the filter filter cloth 13 is positioned on the open window of the frame body. To be installed in The vertices of the pleated ridges 14 formed on the inner surface of the filter cloth 13 are arranged at substantially equal distances and intervals around the center axis 15 of the cylinder. The lower end face of the filter cloth 13 is fixed to the bottom face 16 of the cylindrical frame by an adhesive 17, and the upper end face is fixed to the ring-shaped member 18 by an adhesive 17. The ring-shaped member 18 is fixed to a cylindrical frame by screws 19 or the like. On the bottom surface 16 of the frame, a protrusion
A handle 21 is rotatably supported on the upper surface of the projection 20 so as to be rotatable about the central axis 15 of the cylinder, and is in contact with the inner surface of the filter cloth 13. The handle 21 is provided with a dust remover 22 for repelling the pleated ridges 14 on the inner surface of the filter cloth. A suction port 23 for connecting a dust collection hose is provided on a side surface of the dust case 7. In the filter device 6 of the portable dust collector configured as described above, the suction portion generated by the rotation of the dust collection fan 4 generates a negative pressure inside the filter device 6. As a result, air and dust flow into the dust case 7 from the suction port 23, are separated into dust and air by the filter filter cloth 13, and the dust is collected and adhered on the outer peripheral surface of the filter filter cloth 13. Then, the air passes through the filter cloth 13, passes through the inside of the filter device 6, and is drawn into the motor case 1. If the dust collecting operation is continued, dust is formed in a layer on the surface of the filter cloth and becomes clogged, and the suction capacity of the dust collector is reduced. At this time, filter cloth 13
Receives a force 47 as shown in FIG. 7, and this force is supported by the handle 21. When the suction capacity is reduced, the operator removes the motor case 1 and rotates the handle 21 provided inside the filter device 6 while the filter device 6 is incorporated in the dust case 7.
By rotating the handle 21, the dust remover 23 disposed at the tip of the handle 21 repels the crests 14 on the inner surface of the filter filter cloth 13, so that dust adhering to the outer surface of the filter can be removed. Since the handle 21 is disposed so as to be able to rotate 360 degrees all around, the dust remover 22 can directly repel the ridges 14 formed on the inner surface of the filter cloth 13 over the entire circumference.

The position (dimension C) at which the dust filter 22 is disposed is determined by the length of the filter filter cloth 13 in the axial direction (D).
The size of the filter is set to about one-half of the size because the dust filter 22 receives little reaction from the filter cloth surface and the vibration can be given uniformly in the vertical direction of the filter cloth surface. Good dust efficiency. Also, the position (dimension C) at which the handle 21 is disposed is set to a position which is about 1/2 of the axial length (dimension D) of the filter filter cloth 13 in the cylindrical shape.
Since the filter cloth 13 is supported, the efficiency is high.

[0011] From the above, it is possible to prevent the filter filter cloth from being bent, prevent dust leakage, or reduce the use of an adhesive, and hold the filter filter cloth in a fixed shape without having to hold a filter supporting material. Since the dust removal operation can be performed with the filter device installed in the dust case, the dust can be removed from the dust case and the hands and the like can be cleaned. Since all the peaks of the filter filter cloth folded in a shape can be directly flipped to remove dust, it is possible to obtain an effect that a simple and more effective dust removing operation can be performed.

[0012]

According to the present invention, a dust filter is arranged at a position where the dust filter is engaged with a ridge provided on the filter filter cloth, and a rotating member having the dust filter is brought into contact with the filter filter cloth surface. The efficiency of dust removal operation can be improved.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal side view showing one embodiment of a filter device of a portable dust collector according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a partially longitudinal side view showing an assembled state when a dust collecting operation is performed by incorporating the filter device of the portable dust collector according to the present invention into the dust collector body.

FIG. 5 is a partially longitudinal side view showing a state of a filter device and a dust case when a motor case is removed from a dust case in order to perform dust removal work in the present invention.

FIG. 6 is a perspective view showing an embodiment of a handle in the filter device of the portable dust collector according to the present invention.

FIG. 7 is a partially enlarged view including a partial cross section of FIG.

FIG. 8 is a partially longitudinal side view showing a filter device of a portable dust collector according to the related art.

FIG. 9 is a sectional view taken along line BB of FIG. 7;

FIG. 10 is a partially longitudinal side view showing an assembled state when a dust collecting operation is performed by incorporating a filter device of a conventional portable dust collector into a dust collector body.

FIG. 11 is a side view showing a state of a motor case and a filter device when a motor case is detached from a dust case in order to perform a dust removal operation in the related art.

FIG. 12 is a partially longitudinal side view showing a filter device of a conventional portable dust collector.

[Explanation of symbols]

12 is a rib, 13 is a filter cloth, 16 is a bottom, 18
Is a ring-shaped member, 21 is a handle, and 22 is a dust remover.

Claims (2)

[Claims] 1. A dust collector comprising: a filter filter cloth; a disc-shaped member provided on one end face of the filter filter cloth; and a ring-shaped member provided on the other end face of the filter filter cloth; A dust collector, wherein a dust filter is disposed at a position where the dust filter is engaged with the ridge portion, and a rotating member having the dust filter is brought into contact with the surface of the filter cloth. 2. The dust collector according to claim 1, wherein both end faces of the filter cloth are fixed with urethane rubber.