JP2013078703A - Dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collector which has a higher capacity to brush away dust.SOLUTION: In the dust collector 1 provided with a tank 6 which has a suction port 6a to suck dust, a pouched primary filter 7 installed within the tank 6, a cover 8b, 8c adjusted at the inner side of the primary filter 7, a fan 2a installed at the upper side of the cover 8b, 8c and a motor 2 to drive the fan 2a, an elastomer 9 is installed at the inner side of the primary filter 7 and yet at the lower side of the cover 8b, 8c, so that the elastomer is movable to the up and down directions.

Description

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

  The dust collector shown in Patent Document 1 is provided with a filter cage that is elastically deformed by negative pressure on the inner surface of the filter, and when the operation is stopped, the filter cage is restored to expand the filter and to remove dust accumulated on the filter surface. Met.

JP 2002-045318 A

  However, in the dust collector shown in Patent Document 1, since the filter cage is fixed to the filter, the magnitude of the expansion of the filter is only about the same as the magnitude of the elastic deformation of the filter cage, and the effect of dusting off is not effective. It was small.

  An object of the present invention is to solve the above-described problems and provide a dust collector having a higher ability to remove dust.

  To achieve the above object, a tank having a suction port for sucking dust, a bag-like primary filter provided in the tank, a cover provided inside the primary filter, and an upper part of the cover In the dust collector having a fan and a motor for driving the fan, an elastic body is provided inside the primary filter and below the cover so as to be movable in the vertical direction.

  Further, the secondary filter is supported by the cover, the elastic body is disposed below the secondary filter and the cover, and the outer peripheral surface of the secondary filter and the inner peripheral surface of the primary filter face each other. To do.

  Further, a part of the elastic body is drawn out to form a drawing-out portion so that the primary filter can be deformed to the inside of the elastic body.

  According to the first aspect of the present invention, since the elastic body is provided inside the primary filter and below the cover so as to be movable in the vertical direction, the filter contracts due to negative pressure during operation and the elastic body is moved upward. When the operation is stopped, the elastic body expands and falls downward to collide with the filter vigorously. Due to this impact, the filter is greatly deformed, and the dust accumulated on the filter surface can be strongly wiped off.

  According to invention of Claim 2, even if an elastic body is compressed at the time of a driving | operation, it becomes difficult to contact an elastic body and a secondary filter, and it can prevent that it becomes difficult to flow air with an elastic body.

  According to the third aspect of the invention, the capacity of the tank can be secured even if an elastic body is added.

Whole sectional view which shows the state at the time of the stop of the dust collector which concerns on this invention Whole sectional view showing a state during operation of the dust collector according to the present invention

  The dust collector 1 which concerns on this invention is demonstrated referring FIG.1 and FIG.2.

  On the upper part of the dust collector 1, there is provided a head portion 4 having a motor 2, a fan 2 a that is rotationally driven by the motor 2, and a switch 3 for controlling the start and stop of the motor 2. A tank 6 having an upper opening for storing the sucked dust 5 is provided at the lower part of the head part 4. A suction port 6 a to which a duct hose (not shown) for conveying the dust 5 is connected is provided on the side surface of the tank 6.

  At the upper part of the tank 6, a primary filter 7 having an opening at the upper end is held so as to be sandwiched between the tank 6 and the head part 4. A hook portion 7b that forms an opening is provided at the upper end of the primary filter 7, and a bag-shaped filter cloth material 7a is continuously provided below the hook portion 7b.

  Inside the primary filter 7, a secondary filter 8a supported so as to be sandwiched between the top cover 8b and the bottom cover 8c is provided. The secondary filter 8a is made of a bellows-like filter cloth, and is formed so as to form an annular shape around the rotation axis of the motor-2 as viewed from above. The secondary filter unit 8 is constituted by the secondary filter 8a, the top cover 8b, and the bottom cover 8c. The top cover 8b and the bottom cover 8c function as the covers described in the claims. The primary filter 7 and the secondary filter unit 8 are held with respect to the tank 6 by the hook portion 7 b and the top cover 8 b being sandwiched between the tank 6 and the head portion 4.

  An elastic body 9 made of a breathable sponge or the like is provided inside the primary filter 7 and below the bottom cover 8c. The elastic body 9 is formed in an annular shape from above, and is not fixed to either the primary filter or the bottom cover 8c, but is accommodated inside the primary filter 7 so as to be freely movable in the vertical direction and the horizontal direction. .

  When the dust collector 1 configured as described above is operated, when the switch 3 is turned on, the motor 2 is started, the inside of the tank 6 becomes negative pressure by the rotation of the fan 2a, and the air containing the dust 5 from the duct hose becomes the tank 6 Sucked into the inside. Air is sucked into the tank 6 from the duct hose through the suction port 6a, passes through the primary filter 7 and the secondary filter 8a, and is discharged to the outside of the dust collector 1. When the air passes through the primary filter 7, the dust 5 adheres to the outside of the primary filter 7 and is filtered, and when the air passes through the secondary filter 8a, the remaining dust 5 adheres to the outside of the secondary filter 8a. And filtered.

  When the amount of dust 5 adhering to the primary filter 7 increases, the primary filter 7 becomes clogged and it becomes difficult for air to pass through the primary filter 7, and the primary filter 7 is moved inward by resistance when air passes. Pulled to contract. The elastic body 9 is lifted upward by the force of the primary filter 7 to contract and comes into contact with the lower surface of the bottom cover 8c. The elastic body 9 is sandwiched between the bottom cover 8c and the primary filter 7 and compressed.

  When the operation is stopped by turning off the switch 3, there is no flow of air trying to pass through the primary filter 7, and there is no force to pull the primary filter 7 inward. Then, the elastic body 9 is released from the compressed state and expands downward, and begins to drop vigorously downward due to its own weight. Along with this, the primary filter 7 is also released from the contracted state and extended downward, and when the primary filter 7 returns to its original state, the elastic body 9 further strikes the primary filter 7 and expands the primary filter further. Then, the primary filter 7 is contracted again by the reaction, and the elastic body 9 is lifted upward so that the primary filter 7 bounces like a trampoline and the dust 5 attached to the primary filter 7 can be strongly wiped off.

  The elastic body 9 is disposed below the secondary filter 8a, and even when contracted, the bottom cover 8c serves as a barrier and is difficult to contact the secondary filter 8a. Even when the primary filter 7 and the elastic body 9 are contracted, the outer periphery of the secondary filter 8 a faces the primary filter 7, and the air flow is not blocked by the elastic body 9.

  Further, since the elastic body 9 is annular when viewed from above and the center is drawn out to form a drawn-out portion 9a, the primary filter 7 is more elastic than the elastic body 9 at the center of the elastic body 9, as shown in FIG. Is further contracted inward, and the capacity reduction of the tank 9 due to the addition of the elastic body 9 can be suppressed.

DESCRIPTION OF SYMBOLS 1 Main body 2 Motor 2a Fan 3 Switch 4 Head part 5 Dust 6 Tank 6a Suction port 7 Primary filter 7a Filter cloth 7b Hook part 8 Secondary filter unit 8a Secondary filter 8b Top cover 8c Bottom cover 9 Elastic body 9a Pull-out part

Claims (3)

A tank having a suction port for sucking dust;
A bag-like primary filter provided in the tank;
A cover provided inside the primary filter;
A fan provided above the cover and a motor for driving the fan;
In a dust collector having
A dust collector characterized in that an elastic body is provided inside the primary filter and below the cover so as to be movable in the vertical direction. The secondary filter is supported by the cover, the elastic body is disposed below the secondary filter and the cover, and the outer peripheral surface of the secondary filter and the inner peripheral surface of the primary filter are configured to face each other. The dust collector according to claim 1. 2. The dust collector according to claim 1, wherein a part of the elastic body is drawn out to form a drawing-out portion so that the primary filter can be deformed to the inside of the elastic body.