JPH01209035A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To increase a collectability by sandwiching a secondary filter between a motor housing cylinder to have an inlet hole at a bottom surface and a filter pressing body to cover a housing cylinder lower part, and forming plural recessed line parts to the pressing body. CONSTITUTION:On a bottom surface 19 of a housing cylinder 15 of a motor 17, an inlet hole 20 is provided. To a pressing body 24 to press a bag filter 5, a cylinder part 25 with a diameter larger than that of the housing cylinder 15 and a lower surface 26 opposite to the bottom surface 19 of the housing cylinder 15 are provided, and the housing cylinder 15 is covered with the pressing body 24. A secondary filter 23 is arranged and sandwiched between the housing cylinder 15 bottom surface 19 and the lower surface 26 of the pressing body 24, and further, plural recessed line parts 28 in a lower direction are formed to the lower surface 26 of the pressing body 24. By such a constitution, even when a blinding is generated due to the dust in the bag filter 5 part opposite to an air hole 27 of the pressing body 26, an air intake from the other part of the bag filter 5 can be exhausted through the concave line parts 28 from the secondary filter 23 through the inlet hole 20 of the housing cylinder. Consequently, the dusts can be collected up to the full of the capacity of the bag filter 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a vacuum cleaner having a bag-like filter that is detachable.

←) Conventional technology The main body and a dust collection case containing a bag-shaped filter such as a paper filter are arranged one above the other, and the secondary filter is supported by a filter holder at the bottom of the storage cylinder of the electric blower in the main body. A vacuum cleaner according to the present invention is disclosed in Japanese Utility Model Application Publication No. 47-27576.

However, in this conventional technology, when the bag-shaped filter comes into close contact with the filter presser as the vacuum cleaner operates, most of the suction airflow passes through this contact area, causing clogging, and other parts are Although it is not clogged, there is a drawback that the dust suction performance is reduced.

In addition, bag-shaped filters such as paper filters are required to have high air permeability to increase the suction power and high collection performance to keep the exhaust air clean, so they have a double bag structure. Since these bags are all made of paper, they have the disadvantage that the filters will tear if sharp dust or sand particles are inhaled. 34425 (see Japanese Patent Laid-Open No. 61-109557), it is known that a sponge is provided inside (see Japanese Patent Application Laid-open No. 109557/1983), but the dust collection efficiency becomes poor and the collection capacity decreases. There are also disadvantages in that the structure becomes complicated and manufacturing costs increase.

(c) Problems to be Solved by the Invention The present invention has been made in view of the above points, and a technical problem is to obtain a vacuum cleaner with improved dust suction performance by eliminating clogging of the bag-shaped filter. It is said that

Another technical problem is to obtain a vacuum cleaner having a tear-resistant bag-like filter that has high air permeability, high collection performance, and increased strength.

B) Means for Solving the Problems In order to achieve the above-mentioned first problem, the vacuum cleaner of the present invention includes a dust collection case with an opening on the top surface, which removably houses a bag-shaped filter and is provided with a suction port; The main body includes a main body that covers the upper opening so as to be openable and closable, the main body houses an electric blower and has an intake hole on the bottom surface, and covers a blower storage tube that enters the dust collection case and a lower part of the storage tube. The present invention is characterized in that it includes a filter holding body that holds the secondary filter between it and the bottom surface, and that the filter holding body is formed with a ventilation hole and a plurality of grooves for passing the suction airflow.

Furthermore, in order to achieve the latter object, the vacuum cleaner of the present invention has a bag-like filter removably housed in a dust collection case, wherein the bag-like filter has a mouth plate,
It is characterized by a double-walled bag body consisting of an outer filter bag made of paper and an inner filter bag made of composite fibers having a heat-adhesive non-woven fabric structure.

(e) Depending on the configuration of the front stage of the operation, the intake airflow that passes through the bag-shaped filter due to the operation of the electric blower enters the main body from the air hole of the filter holder, through the secondary filter, and from the air intake hole of the blower storage tube. At the same time, a part of the intake airflow passes through the concave portion of the filter holder and then enters the main body from the intake hole via the secondary filter. Even if the part of the bag-shaped filter facing the ventilation hole becomes clogged with dust in the suction airflow, the suction airflow passing through the grooves passes through the other part, so that clogging does not occur as a whole. . Further, the grooved portions serve as legs when the main body is removed from the dust collection case and placed on the floor.

Furthermore, due to the latter structure, the filter interior of the bag body of the bag-like filter is made of composite fibers that are heat-adhesive and have a non-woven structure, so it has high strength, and even if sharp dust or sand particles are inhaled, the bag-like filter will not tear. do not have. Furthermore, by utilizing the thermal adhesive properties of the filter inner bag, a bag-shaped filter can be easily produced by integrating it with a paper filter outer bag.

(f) Example Hereinafter, the vacuum cleaner of the present invention will be explained based on FIGS. 1 to 5.

Ill f'i A dust collection case made of a small cylindrical metal with a bottom and an opening on the top (2), with a suction port (4) for connecting a suction hose (3) on the side, and a disposable pipe as described below inside. A bag-shaped filter (5) of the type is housed in a filter storage box (6) with an open top and air permeability, and is detachably installed.

(7) is a main body of the vacuum cleaner which covers the top opening (2) of the dust collection case +11 in an openable and closable manner, and is secured by a pair of clamp means (81 (9)) provided opposite to the peripheral edge of the vacuum cleaner. It is integrated with the dust case (1).

C11 is a synthetic resin wheel mounting base larger than the outer peripheral surface of the dust collecting case (1) into which the lower bottom of the dust collecting case (1) is fitted and fixed; Attach wheel α2.

The main body (7) consists of an upper case (141) provided with a handle (131) at the upper part, and a lower case (16) in which a blower storage cylinder f151 that enters the dust collection case (1) is formed to protrude downward from the center. , electrical components such as an electric blower (1"rI and a power switch (not shown)) are housed.The blower housing tube (151) has its lower part reduced to a small diameter to form an annular stepped portion 085, The bottom surface (1!J) has a plurality of intake holes (■...) arranged concentrically and four support lips Q11... ) is housed in the blower storage tube (151) with the suction side facing downward by locking the annular buffer gasket (through the edge to the annular step portion α&).

Furthermore, ■ is a secondary filter made of sponge that covers the intake hole ■... (241 is a filter holder that covers the lower part of the blower storage tube α9 and holds the secondary filter between it and the bottom surface (11) The filter holding body C241 has a cylindrical portion with a diameter larger than the storage tube (19) and a lower surface opposite to the bottom surface H, and the lower surface (2) has a shape shown in FIG.
As shown in FIG. 4, a plurality of ventilation holes communicating with the intake holes (1) are arranged concentrically and are opened from the boundary between the cylindrical part and the lower surface (4). Air vent (2
A plurality of downward grooves connected to 71...
are formed to protrude radially. Then, the secondary filter CI! 3, and tighten the mounting screw (
29 through the screw hole ■ of the filter holding body Q4 and the insertion hole Cal+ of the secondary filter t231.
21), the shift filter presser body (material) is attached to the lower part of the storage tube (151).

Furthermore, as shown in FIG. 5, the bag-shaped filter (5) includes a mouth plate mortar in which a dust suction hole (■) corresponding to the suction port (4) is bored, and a bag body (with a bag mouth glued to the mouth plate mortar). (to) and
The bag C141 has a double-walled structure consisting of a paper filter outer can with a dense mesh and a composite fiber filter inner bag that is heat-adhesive and has a non-woven fabric structure.

The composite fiber constituting the filter inner bag is, for example, a polyolefin-based heat-adhesive composite fiber sold by Chisso Corporation as "rE8 fiber", which contains a low melting point component and a high melting point component in one fiber. It is a composite fiber made of composite fibers that contributes to heat settling and also has a non-woven structure. , making it difficult to tear. Therefore, even if sharp dust or sand particles are inhaled, the filter inner bag will not be torn, and the fine dust that has passed through the filter inner bag will be collected by the filter outer bag.

In addition, in the manufacturing process of the bag-shaped filter (5), in order to adhere the filter inner bag (to) and the filter outer bag (to) so that they do not shift, the filter inner bag (to) is
By utilizing the thermal adhesive properties of the composite fibers constituting the filter outer bag □□□ by heating, it is possible to bond without using an adhesive (binder) as in the past. In addition to simplifying the manufacturing process, the filter inner bag (
(to) The electrostatic collection property can be improved by charging the composite fiber.

The bag-shaped filter (5) is connected to the suction port (4) by removably attaching its mouth plate to the mouth plate attachment mechanism C (7) of the filter storage box (6). It is housed in the dust collection case (1).

Then, the dust that enters the bag-like filter (5) along with the suction airflow from the suction hose (3) due to the operation of the electric blower σD is collected by the bag-like filter (5), and at this time, sharp dust, sand particles, etc. Composite fiber filter inner bag even if inhaled (to)
cannot be torn. The suction airflow that has passed through the bag-shaped filter (5) is passed from the filter holder (ventilation hole surface of 241...) to the secondary filter, and then from the air blower storage cylinder (intake hole of 151) to the main body (7). As shown in FIG. 4, part of the suction airflow passes through the downward grooved part @ from the gap between the cylindrical part j of the storage cylinder (151 and filter holding body t24), and then flows into the second part. Next, it enters the main body (7) from the air intake hole through the filter.Here, the part of the bag-shaped filter (5) facing the air hole is slightly covered with dust in the airflow. Even if a clogging state occurs, the suction airflow that has passed through other parts of the bag-shaped filter (5) passes through the downward groove side and reaches the ventilation hole ( 201... to main body (7)
Because the bag-like filter (5) as a whole does not get clogged, the entire bag body of the bag-like filter (5) can be used effectively, and the dust is stored up to the dust collection capacity of the bag body (end). can.

Furthermore, when disposing of garbage, the main body (7) removed from the dust collection case (1) is placed near the downward groove.
-By placing the lower end on the floor, the downward grooved portion can be used as a leg, and the filter holding cylinder (24
The entire bottom surface of No. 1 does not come in contact with the floor surface and get dirty.

(G) Effects of the Invention According to the present invention, the structure is simple, in that the grooves are formed downward in the filter holder, and the suction airflow is transmitted through the air holes of the filter holder and the grooves into the main body. Since the dust is sucked into the inside of the bag-shaped filter, sufficient suction airflow passes through other than the part facing the ventilation hole of the bag-shaped filter, so that the bag-shaped filter as a whole is free from clogging and improves dust suction performance and collection efficiency. You can get a vacuum cleaner.

Further, according to the bag-shaped filter of claim 2, the bag body has a double wall structure of an outer filter bag made of paper and an inner filter bag made of composite fibers having a heat-adhesive non-woven fabric structure. The bag-shaped filter has increased strength so that it will not tear even when sharp dust and sand particles are inhaled, and it is easy to manufacture because it can be integrated with the outer filter bag using the thermal adhesive properties of the inner filter bag itself. This makes it possible to obtain a bag-shaped filter with reduced manufacturing costs.

[Brief explanation of the drawing]

The drawings all relate to the vacuum cleaner of the present invention, and Fig. 1 is a partially cutaway side view, Fig. 2 is an overall perspective view, Fig. 6 is an exploded perspective view of main parts of the main body, and Fig. 4 is each of Fig. 5. FIG. 5 is a cross-sectional view taken along the line A-A after the parts are assembled, and a side view showing the structure of the bag-like filter. (1)...Dust collection case, (5)...Bag filter, (7)...Main body, (15)...Blower storage tube, (20)...Intake hole, c24) ...filter holding body, (27+...ventilation hole, (2)...downward groove, field...mouth plate, (to)...bag body,
Field: Paper filter inner bag, (To): Composite fiber filter outer bag.

Claims (2)

[Claims] (1) Consists of a dust collection case with an opening on the top surface that removably stores a bag-like filter and is provided with an intake port, and a main body that covers the top opening so that it can be opened and closed.The main body houses an electric blower and has an intake port. A blower housing tube is provided on the bottom surface and fits into the dust collection case, and a filter holding body covers the lower part of the housing tube and holds a secondary filter between it and the bottom surface. A vacuum cleaner characterized by forming pores and a plurality of grooves for passage of suction airflow. (2) A bag-like filter is detachably stored in a dust collection case, and the bag-like filter has a mouth plate, an outer filter bag made of paper, and an inner filter bag made of composite fibers having a heat-adhesive non-woven fabric structure. A vacuum cleaner characterized by comprising a bag body with a double wall structure.