JP2015186780A - dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collector capable of efficiently shaking down dust adhering to a bag-like filter arranged in a tank, accompanying operation/stop action.SOLUTION: A dust collector includes: a head 2 having a motor 3 and a dust collection fan 4 rotatably driven by the motor 3; a tank 10 with a suction port 11 for dust having an opening on one side where the head 2 is arranged; a bag-like primary filter 21 provided in the tank that deforms in a direction that it contracts by the suction force while the dust collection fan 4 is rotating; and an elastic body 40 that restores the primary filter 21 when the dust collection fan 4 is in a stop state. The dust collector further includes an inner member 30 having a plurality of protrusions, or a plurality of recesses or window parts located inside the primary filter 21.

Description

  The present invention relates to a dust collector having a dust removing function for removing dust adhering to a filter.

  As a dust collector having this kind of dust removal function, for example, there is Patent Document 1 below. In this dust collector, a bowl-shaped filter gauge composed of a steel wire and a spring steel plate is disposed inside a filter cloth in a tank. The filter gauge is indented together with the filter cloth due to the negative pressure during operation of the dust collector, but when the operation was stopped, the filter gauge returned to the direction of inflating the filter cloth outward by the spring force and adhered to the surface of the filter cloth. It is supposed to remove dust.

JP 2002-45318 A

  The dust removal structure in the dust collector of Patent Document 1 uses the elastic deformation of a bowl-shaped filter gauge composed of a steel wire and a spring steel plate, so that when the filter cloth is contracted, the surface is maintained (the unevenness is large). Therefore, even when the dust collector is stopped and the elastically deformed filter gauge is restored, there is a problem that the filter cloth surface does not move so much that dust cannot be efficiently removed.

  The present invention has been made in view of such a situation, and the purpose of the present invention is to enable the dust attached to the bag-like filter disposed in the tank to be efficiently removed with the operation and stop operation. It is to provide a dust collector.

  The first aspect of the present invention is a dust collector. The dust collector includes a motor, a head having a dust collecting fan that is rotationally driven by the motor, a dust suction port that opens to one side, and a tank in which the head is disposed in the opening, A bag-like filter that is deformed in a direction of contraction by the suction force of the dust-collecting fan when the dust-collecting fan is rotated, and a restoring member that restores the bag-like filter when the dust-collecting fan is stopped. And a plurality of convex portions, or an inner member having a plurality of concave portions or window portions, which are located inside the bag-shaped filter.

  In the first aspect, the restoring member may be a cylindrical elastic body, and may be disposed inside the bag-like filter so as to contract in the axial direction when the dust collecting fan rotates.

  In the first aspect, the cylindrical elastic body is an air-permeable foamed resin molded body that shrinks in the axial direction when the dust collecting fan rotates, and the edge of the outer peripheral portion does not fall inward. There should be.

  In the first aspect, a tubular filter is disposed inside the bag-shaped filter, the inner member is disposed outside the tubular filter, and the tubular elastic body is disposed below the tubular filter. It is good that it is the composition.

  In the first aspect, an intermediate filter may be disposed on the outer peripheral side of the cylindrical filter inside the inner member.

  In the first aspect, the intermediate filter may be fixed to the cylindrical filter via the inner member.

  The second aspect of the present invention is also a dust collector. The dust collector includes a motor, a head having a dust collecting fan that is rotationally driven by the motor, a dust suction port that opens to one side, and a tank in which the head is disposed in the opening, A bag-like filter that is deformed in the direction of contraction by the suction force of the dust-collecting fan when the dust-collecting fan is rotated, and a cylindrical elastic that restores the bag-like filter when the dust-collecting fan is stopped The cylindrical elastic body is a breathable foamed resin molded body that shrinks in the axial direction when the dust collecting fan rotates, and the edge of the outer peripheral portion does not fall inside. It is characterized by.

  The said 2nd aspect WHEREIN: As for the said cylindrical elastic body, the thickness of a cylinder part is good in it being 1/2 or more of an internal diameter.

  The said 2nd aspect WHEREIN: As for the said cylindrical elastic body, the thickness of a cylinder part is good in it being 1/2 or more of the height of an axial direction.

  It should be noted that any combination of the above-described constituent elements, and those obtained by converting the expression of the present invention between methods and systems are also effective as aspects of the present invention.

  According to the dust collector according to the present invention, it is possible to efficiently remove dust adhering to the bag-like filter disposed in the tank along with the operation and stop operation.

It is a sectional side view which shows embodiment of the dust collector which concerns on this invention. It is a decomposition | disassembly side sectional view similarly. It is a partial sectional side view which shows the inner member provided with the uneven | corrugated shape in embodiment, a secondary filter, and a tertiary filter. FIG. 4 is a partially exploded side sectional view showing an A portion of FIG. 3 in an enlarged manner. It is a sectional side view which shows the state which attached the secondary filter to the said inner side member. It is a perspective view which shows the said inner side member. It is a perspective view which shows the cylindrical elastic body used by embodiment. In embodiment, it is a sectional side view which shows the operation | movement during sucking dust. Similarly, it is a partially enlarged side sectional view. In embodiment, it is a sectional side view which shows the state at the time of a suction stop. It is a perspective view which shows the modification of an inner member.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or equivalent component, member, process, etc. which are shown by each drawing, and the overlapping description is abbreviate | omitted suitably. In addition, the embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

  An embodiment of a dust collector according to the present invention will be described with reference to FIGS. In these drawings, a dust collector 1 includes a head cover 2a, an electric motor 3 disposed and fixed inside the head cover 2a, and a dust collecting fan 4 that is rotationally driven by the motor 3 and sucks dust P (see FIGS. 8 to 10). And a bottomed tank 10 having a dust inlet 11 on the side surface and opening upward, and the head 2 is disposed in the opening. The head 2 is arranged so as to close the upper opening of the bottomed tank 10 with a head cover 2 a and is detachable from the tank 10. The head cover 2 a has an exhaust port 5 for discharging the dust P sucked by the dust collecting fan 4. Have. The tank 10 has an internal space for storing the dust P.

  A dust suction port 11 is formed in the tank 10, and a primary filter 21 as a bottomed bag-like filter and a primary filter are formed inside the tank 10 so as to partition the dust collecting fan 4 on the head 2 side. A secondary filter 22 as an intermediate filter located inside the filter 21 and a tertiary filter 23 as a cylindrical filter covering the surface of the secondary filter 22 are arranged.

  The primary filter 21 has a bottomed bag shape of, for example, synthetic fiber with an opening at the top, and an annular hook portion 21 a provided at the opening edge of the primary filter 21 is hooked on the upper opening of the tank 10, thereby 11 and the head 2 can be partitioned.

  The tertiary filter 23 is cylindrical and is held so as to be sandwiched between the top cover 25 and the bottom cover 26. The outer edge of the top cover 25 is located between the tank 10 and the head cover 2a together with the annular hook portion 21a of the primary filter 21. The primary filter 21 and the tertiary filter 23 are fixedly supported with respect to the tank 10.

  As shown in FIGS. 3 to 6, an inner member 30 having an uneven shape portion 31 in which a concave portion and a convex portion are repeatedly formed is fixed (attached) to the bottom cover 26. As shown in FIG. 6, the inner member 30 has a cylindrical shape, and the uneven portion 31 is formed at a plurality of locations in the axial direction (vertical direction). An elastic locking piece 33 rises from the bottom surface portion 32 of the inner member 30, and a locking claw 34 at the tip engages with the upper end of the outer peripheral portion of the bottom cover 26. As can be seen from FIG. 6, the concavo-convex portions 31 are formed in the axial direction (vertical direction) of the cylindrical inner member 30 and are arranged at intervals in the circumferential direction. It becomes part 35. An annular filter insertion groove 36 is formed inside the lower part of the inner member 30.

  The secondary filter 22 as an intermediate filter provided between the primary filter 21 and the tertiary filter 23 is inserted and fixed in the filter insertion groove 36 and is held inside the inner member 30. As a result, the secondary filter 22 surrounds the outer periphery of the tertiary filter 23. Further, the uneven portion 31 of the inner member 30 protrudes outside the secondary filter 22.

  The inner member 30 can be removed from the tertiary filter 23 side by removing the locking claw 34 from the bottom cover 26 using the elasticity of the elastic locking piece 33. That is, the inner member 30 and the secondary filter 22 are detachable from the tertiary filter 23.

As shown in FIGS. 1, 2, and 7, a cylindrical elastic member made of a foamed resin molded body having air permeability is provided inside the primary filter 21 at a position below the tertiary filter 23 (a position below the inner member 30). A body 40 is arranged. The foamed resin material of the cylindrical elastic body 40 is, for example, polyurethane foam, and the density of the molded body is about 30 kg / m ³ so as to have an appropriate hardness. As shown in FIG. 7, when the axial height of the cylindrical elastic body 40 is H, the inner diameter is d, and the thickness of the cylindrical portion is T, the thickness T of the cylindrical portion is 1 of the axial height H. It is preferable to set it to have a thickness T of 1/2 or more, or 1/2 or more of the inner diameter d.

  In the configuration of the above embodiment, if the dust collector 1 is in an operating state and the dust collecting fan 4 is rotationally driven by the electric motor 3, the air flow including the dust P is sucked into the suction port 11 as shown in FIGS. Then, the dust is captured by passing through the tank 10 and passing through the primary filter 21, the secondary filter 22, and the tertiary filter 23, and the air flow from which the dust has been removed is discharged from the exhaust port 5 by the dust collecting fan 4. In the operating state of the dust collector 1, when the dust P is continuously sucked from the suction port 11 by the rotation of the dust collecting fan 4 and the dust P is accumulated on the surface of the primary filter 21, the bag-shaped primary filter 21 is turned on. The side part of the secondary filter 22 shrinks inward along the concave / convex shape portion 31 of the inner member 30 disposed inside the primary filter 21. At the same time, the cylindrical elastic body 40 side portion of the primary filter 21 shrinks the elastic body 40 upward without causing the edge of the outer peripheral portion of the elastic body 40 to fall inward, and the surface of the primary filter 21 also shrinks upward. When the operation is stopped in this state, that is, the fan 4 is stopped, as shown in FIG. 10, the shrunk bag-shaped primary filter 21 is pushed downward by the restoring force of the elastic body 40, and the secondary filter 22 of the primary filter 21. The surface of the side portion is changed from the shape along the concavo-convex shape portion 31 of the inner member 30 to the surface shape with less concavo-convex, so that the dust P accumulated on the surface can be removed to the bottom of the tank 10. The side portion of the cylindrical elastic body 40 of the filter 21 is also changed from a shape collapsed together with the cylindrical elastic body 40 to a surface shape with less unevenness, so that dust P deposited on the surface can be removed to the bottom of the tank 10. it can.

  The head 2 is detachably attached to the tank 10, and when dust P sucked into the tank 10 is accumulated, the operator removes the head 2 from the tank 10 and discards the dust P in the tank 10.

  According to the present embodiment, the following effects can be achieved.

(1) Since the inner member 30 having the concavo-convex shape portion 31 composed of a plurality of concave portions and convex portions and the window portion 35 therebetween is provided in the bag-like primary filter 21, dust P accumulates on the surface of the primary filter 21 during operation. As a result, the side part of the inner member 30 of the bag-shaped primary filter 21 is shrunk inward along the concave-convex shape portion 31 of the inner member 30 to generate a large number of concaves and convexes. Since the cylindrical elastic body 40 that has shrunk at the time of stopping returns to its original shape, the side surface of the bag-like primary filter 21 is restored to a surface with less irregularities, so along with the operation of the dust collector 1 and the stopping operation, The dust adhering to the side part of the inner member 30 of the primary filter 21 can be efficiently removed.

(2) The cylindrical elastic body 40 is an air-permeable foamed resin molded body having an appropriate hardness, for example, a polyurethane foam having a density of about 30 kg / m ^3. Although it shrinks in the (vertical direction), the edge of the outer periphery is assumed not to fall inside. As a result, the cylindrical elastic body 40 is contracted in the vertical direction to form an uneven shape on the outer periphery, and the side surface of the primary filter 21 becomes uneven along this, and the restoration operation of the cylindrical elastic body 40 due to operation stop causes the primary filter 21 The dust P adhering to the side part of the cylindrical elastic body 40 can be efficiently removed.

(3) When the axial height of the cylindrical elastic body 40 is H, the inner diameter is d, and the thickness of the cylindrical portion is T, the thickness T of the cylindrical portion is ½ or more of the axial height H. Or, by setting it to have a thickness T of 1/2 or more with respect to the inner diameter d, the dust collecting fan 4 is shrunk in the axial direction (vertical direction) when rotating, but the edge of the outer peripheral part falls inward. It is possible to avoid it. Thereby, when the elastic body 40 contracts during suction, large irregularities are formed on the outer periphery thereof.

(4) Since the secondary filter 22 and the inner member 30 are integrally attached to the tertiary filter 23 and the secondary filter 22 can be attached to and detached from the tertiary filter 23 at the same time as the inner member 30, the secondary filter 22 Assembly and maintenance at the time of mounting and replacement can be improved.

  The present invention has been described above by taking the embodiment as an example. However, it is understood by those skilled in the art that various modifications can be made to each component and each processing process of the embodiment within the scope of the claims. By the way. Hereinafter, modifications will be described.

  In the above embodiment, the cylindrical inner member 30A of FIG. 11 may be used instead of the inner member of FIG. In this case, annular portions 51 functioning as convex portions are formed at intervals in the axial direction (vertical direction), and the respective annular grooves 51 are connected by connecting portions 52 in the axial direction. A portion without the annular portion 51 and the connecting portion 52 is a window portion 53 that functions as a recess. Other configurations are the same as those of the inner member of FIG.

  Also in the case of the inner member 30A in FIG. 11, the bag-shaped primary filter is greatly deformed with the convex portion of the annular portion 51 and the concave portion of the window portion 53 during dust accumulation, so the primary filter has the original shape. By returning, the dust can be efficiently removed to the bottom of the tank.

  In addition, although an elastic body was used as a restoring member that restores the primary filter shrunk during the operation of the dust collector to its original shape, a weight placed on or attached to the bottom of the primary filter, or a spring provided in the primary filter, etc. It may be used as a restoring member.

DESCRIPTION OF SYMBOLS 1 Dust collector 2 Head 3 Electric motor 4 Dust collector fan 5 Exhaust port 10 Tank 11 Suction port 21 Primary filter 22 Secondary filter 23 Tertiary filter 30, 30A Inner member 31 Uneven shape part 32 Bottom surface part 33 Elastic locking piece 34 Locking claw 35, 53 Window part 36 Filter insertion groove 40 Cylindrical elastic body 51 Annular part 52 Connection part

Claims (9)

A head having a motor and a dust collecting fan that is rotationally driven by the motor;
A tank that has a dust inlet and opens to one side, and the head is disposed in the opening;
A bag-like filter that is provided in the tank and is deformed in a direction of contraction by the suction force of the dust collecting fan when the dust collecting fan is rotated;
A restoring member for restoring the bag-like filter in a stopped state of the dust collecting fan;
A dust collector comprising: a plurality of convex portions, or an inner member having a plurality of concave portions or window portions, which are located inside the bag-shaped filter.   2. The dust collector according to claim 1, wherein the restoring member is a cylindrical elastic body, and is disposed inside the bag-like filter so as to contract in an axial direction when the dust collecting fan rotates.   The cylindrical elastic body is a foamed resin molded body having air permeability, and contracts in an axial direction when the dust collecting fan rotates, and an edge of an outer peripheral portion does not fall inward. Item 3. A dust collector according to Item 2.   A cylindrical filter is arranged inside the bag-shaped filter, the inner member is arranged outside the cylindrical filter, and the cylindrical elastic body is arranged below the cylindrical filter. The dust collector according to claim 2 or 3.   The dust collector according to claim 4, wherein an intermediate filter is disposed on the outer peripheral side of the cylindrical filter inside the inner member.   The dust collector according to claim 5, wherein the intermediate filter is fixed to the cylindrical filter via the inner member. A head having a motor and a dust collecting fan that is rotationally driven by the motor;
A tank that has a dust inlet and opens to one side, and the head is disposed in the opening;
A bag-like filter that is provided in the tank and is deformed in a direction of contraction by the suction force of the dust collecting fan when the dust collecting fan is rotated;
A cylindrical elastic body for restoring the bag filter in a stopped state of the dust collecting fan,
The cylindrical elastic body is an air-permeable foamed resin molded body, and contracts in the axial direction when the dust collecting fan rotates, and the outer peripheral edge does not fall inward. .   The dust collector according to claim 3 or 7, wherein the cylindrical elastic body has a cylindrical portion having a wall thickness of ½ or more of an inner diameter.   9. The dust collector according to claim 7, wherein the cylindrical elastic body has a cylindrical portion having a thickness of ½ or more of an axial height.

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