JP2003102659A - Dust collecting filter for vacuum cleaner and vacuum cleaner provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a high-quality filter for a vacuum cleaner where defective adhesion is little. SOLUTION: The dust collecting filter 4 used for the vacuum cleaner is provided with a port frame 11 where a suction opening 11a is formed and a dust collecting bag 12 which is formed in the state of a bag having an inlet 12a facing the suction opening 11a and which has the peripheral part of the inlet 12a adhered to the port frame. The dust collecting bag 12 is formed of a sheet made of filtering material having air-permeability. The adhesion part of the sheet 21 with each other at the bag 12 and adhesion of the port frame 11 and the surrounding of the inlet 12a are made by using hot melt adhesive 31, 33, and 34 in the state of ribbons determined corresponding to the shape of these adhesion part. The adhesive 31, 33, and 34 include no volatile components, are in a solid state at a normal temperature and shows a hot melt function when they are heated and pressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting filter for a vacuum cleaner that captures dust sucked together with a suction airflow, and an electric vacuum cleaner equipped with this filter.

[0002]

2. Description of the Related Art As a dust collecting filter for a vacuum cleaner, a filter having a mouth frame and a dust bag adhered to the mouth frame is widely used. The dust collecting bag of this type of filter is formed by bending a fibrous sheet forming a filter material and adhering a mating portion that requires adhesion, and the mouth frame is also adhered to the dust collecting bag. And the said adhesion is performed using the solvent type adhesive agent.

When a solvent-type adhesive is used, the bag-making process is easy to mechanize. However, in the case of mechanization, a large-scale dedicated equipment such as a long belt conveyor and a curing process is required, and the machine once installed is not suitable for producing a large number of small quantities of dust collecting filters. Under these circumstances, a small amount of dust collecting filters are currently manufactured using solvent-based adhesives.

When a person tries to make a bag by hand for the purpose of making a large number of small lots, in addition to the change in the concentration and viscosity of the adhesive due to the climate change, the amount of adhesive applied varies in the manual operation. Therefore, adhesion failure is likely to occur.

That is, if the coating amount is too large, the portions other than the predetermined adhesive portion are adhered due to the protrusion of the adhesive near the predetermined adhesive portion. When this dust collecting filter is set in the dust collecting chamber and used, even if the suction airflow acts, the dust collecting bag cannot be properly inflated to trap the dust. On the contrary, if the coating amount is too small, the strength of the adhesive portion may locally decrease. When this dust collecting filter is set in the dust collecting chamber and used, the dust collecting bag may be torn from the part with low adhesive strength as the dust collecting bag expands due to the pressure of the suction air flow and the dust accumulated by the trapping. Conceivable.

Further, since the dust bag is subjected to a force of pulling away from the mouth frame by being expanded, the dust bag is adhered to the mouth frame which is hooked and supported by the mouth frame holding portion of the dust collecting chamber. When the adhesive application amount is too small and the adhesive strength between the mouth frame and the dust collecting bag is reduced, the dust collecting bag may be peeled off from the mouth frame.

If the dust-collecting bag does not properly inflate as described above, the effective dust-collecting volume decreases, so that the frequency of filter replacement increases. Further, when the dust bag is damaged or the bag is peeled from the mouth frame, much of the dust sucked together with the suction airflow may be sucked into the electric blower, causing a failure.

[0008]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to obtain a high-quality filter for a vacuum cleaner with few adhesion defects, and to avoid various problems caused by a defect of the dust collecting filter. To get a possible vacuum cleaner.

[0009]

The invention according to claims 1 and 2 has a mouth frame having a suction opening, and an inlet facing the suction opening by using a sheet made of a filter material having air permeability. It is premised on a dust collecting filter for a vacuum cleaner, which includes a dust collecting bag formed in a bag shape and having a peripheral portion of the inlet bonded to the mouth frame.

In order to solve the above problems, in the invention according to claim 1, the dust bag has an adhesive portion between the sheets, and the adhesion of the adhesive portion corresponds to the shape of the adhesive portion. It is characterized in that it is made by using a hot melt adhesive having a predetermined shape.

In the present invention and each of the following inventions, a thin paper made of a fiber such as a vegetable fiber or a synthetic fiber can be suitably used for the sheet forming the dust collecting bag, and the sheet may be a single layer or a multilayer. Good, and it does not hinder the addition of a functional layer for antibacterial or deodorizing to this sheet. In the present invention and each of the following inventions, the sheet forming the dust collecting bag may be made of a single sheet or a combination of a plurality of sheets.
Further, in the present invention and each of the following inventions, thick paperboard (thick paper manufactured from wood pulp, waste paper, etc.) can be preferably used for the mouth frame. The hot-melt adhesive used in the present invention and each of the following inventions is an adhesive that does not contain a volatile component, maintains a solid state at room temperature, melts by heating, and solidifies when cooled, and exhibits an adhesive function, For this adhesive, a thermocompression-bonding type or a heat-reaction type polyolefin can be suitably used, and among them, one containing ethylene / vinyl acetate copolymer resin as a main component can be suitably used, and also synthetic rubber type, polyamide type, polyester type, or the like. Any adhesive can be used.

According to the first aspect of the invention, the mating portions of the sheets forming the dust collecting bag are adhered using an adhesive, and the adhesive used for this adhesion corresponds to the shape of the adhered portion at room temperature. It is a solid-state hot melt adhesive formed in the above shape. By heating and pressurizing the adhesive while sandwiching it between the mating parts, the mating parts are adhered according to their shapes, so that the adhesive strength is not insufficient and the adhesive does not stick out due to variations in the coating amount.

Further, in order to solve the above problems, a second aspect
The invention according to, characterized in that the adhesion portion of the dust bag and the mouth frame is adhered using an annular hot melt adhesive that is defined in a small shape less than the projected area of the mouth frame There is.

According to the second aspect of the present invention, the dust collecting bag and the mouth frame, and the peripheral portion of the inlet of the dust collecting bag and the mouth frame are adhered to each other with an adhesive, and the dust collecting bag and the mouth frame are used for the adhesion. The adhesive is a solid hot melt adhesive formed in an annular shape corresponding to the shape of the bonded portion at room temperature. This adhesive, by heating and pressurizing the mating portion of the dust bag and mouth frame,
Since the mating portion is adhered according to its shape, the adhesive strength is not insufficient due to the variation in the coating amount.

Further, in order to solve the above-mentioned problems, a third aspect of the present invention is provided.
The invention according to, in a cleaner body having a dust suction port and a dust collection chamber that communicates with the dust suction port, accommodates an electric blower located downstream of the dust collection chamber and collects the dust in the dust collection chamber. An electric vacuum cleaner which houses a dust filter and captures the dust sucked together with the airflow through the dust suction port by the dust collecting filter, wherein the dust collecting filter according to claim 1 or 2 is used. .

According to the present invention, since the dust collecting filter according to claim 1 or 2 having no adhesion failure and having high quality is used by being housed in the dust collecting chamber, various problems caused by the adhesion failure of the dust collecting filter are caused. It is possible to provide an electric vacuum cleaner that can avoid

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view showing the entire canister-type electric vacuum cleaner. This electric vacuum cleaner 1 has a cleaner main body 2 having wheels that can freely move on the floor surface, an electric blower 3,
A dust collecting filter 4, a dust suction hose 5, an extension pipe 6, a dust suction body 7, and the like are provided.

The cleaner main body 2 has a dust collecting chamber lid 2a which is openable and closable, for example, on the front upper surface thereof. Further, inside the cleaner body 2, there is provided a dust collection chamber (not shown) facing directly below the dust collection chamber lid 2a, and at the rear side of this dust collection chamber, in other words, based on the intake flow. Blower chambers (not shown) located downstream of the dust collection chambers are provided respectively.

A dust collecting filter 4 is housed in the dust collecting chamber so that it can be taken in and out, and an electric blower 3 is housed in the blower chamber. A dust suction port 2b is provided substantially horizontally, for example, on the front surface of the cleaner body 2, and one end of a dust suction hose 5 is detachably inserted into this dust suction port 2b. The dust suction hose 5 and the extension pipe 6 form a suction pipe that connects the dust collection chamber and the dust suction body 7, and the dust suction hose 5 has a handle 5a with a hand operation switch at the other end. One end of a hard extension pipe 6 is detachably connected to the handle 5a, and a dust suction body 7 is detachably connected to the other end of the extension pipe 6.

In the electric vacuum cleaner 1 having the above-mentioned structure, by driving the electric blower 3, the wind force of the blower 3 sucks the dust on the surface to be cleaned from the dust suction body 7, and the extension pipe 6 and the dust suction It is guided to the dust collecting chamber of the cleaner body 2 via the hose 5, and the dust is collected by the dust collecting filter 4 in this chamber. The air (intake flow) that has passed through the dust collecting filter 4 is sucked into the electric blower 3 and passes through the blower 3,
It is discharged to the outside through an exhaust port (not shown) of the cleaner body 2. As described above, the surface to be cleaned can be cleaned.

Next, the dust collecting filter 4 will be described with reference to FIGS. The filter 4 includes a mouth frame 11 and a dust bag 12.

The mouth frame 11 is made of thick paperboard,
As shown in FIG. 2, it has a square outer shape and has a suction opening 11a at the center thereof. A mouth frame holder (not shown) is provided in the dust collecting chamber. The holder has rail portions each having a groove extending in the up-down direction and having a substantially U-shaped horizontal cross section at predetermined intervals in the width direction of the cleaner body 2.
Then, the dust collecting filter 4 is mounted in the dust collecting chamber by inserting the two parallel sides 11b of the mouth frame 11 into the grooves facing each other of the rail portion from above. In this mounted state, the ring-shaped rubber packing, which is located between the rails and is mounted on the mouth frame holder, has the suction opening 1
The peripheral surface of 1a is elastically adhered to maintain airtightness between the mouth frame 11 and the mouth frame holder. Although not shown in the drawings, when the dust collecting filter 4 accommodated as described above swells in the dust collecting chamber, the filter support that supports the bottom of the filter 4 and the dust collecting filter 4 is supported from the surroundings. Ribs and are provided.

As shown in FIGS. 3 and 4, the dust collecting bag 12 is
It is formed into a bag shape using a breathable thin paper sheet made of a filtering material such as non-woven fabric, and has an inlet 12 thereof.
It is provided by adhering the peripheral portion of a to the back surface of the mouth frame 11.
Therefore, the inlet 12a and the suction opening 11a of the mouth frame 11
And are closely opposed to each other.

FIG. 5 (A) shows a developed view of the paper sheet 21 forming the dust collecting bag 12.
A procedure for making the dust collecting filter 4 using the No. 1 and the mouth frame 11 will be described with reference to FIG.

One rectangular paper sheet 21 shown in FIG. 5A is provided with parallel first to sixth folds 22 to 27 extending in a direction orthogonal to the longitudinal direction. . First fold 22 and sheet 21 near it
Of the sheet 21 is used as a joining portion 28, and the other end of the sheet 21 in the longitudinal direction is used as another joining portion 29 that is overlapped with the joining portion 28. , Third and fourth creases 24, 2
The suction opening 11a is opened in a portion between the five.

The paper sheet 21 having the above construction has the first fold line 22, the third fold line 24, the fourth fold line 25, and the sixth fold line.
By fold-folding the fold line 27 and valley-folding both the second fold line 23 and the fifth fold line 26, as shown in FIG.
As shown in (B), it is bent and the aligning portion 29 is superposed on the aligning portion 28.

In this state, the hot-melt adhesive 31 is sandwiched between the mating parts 28 and 29 to apply heat and pressure to bond the mating parts 28 and 29. The adhesive 31 has a shape corresponding to the shape of the adhesive portion formed by adhering the two mating portions 28 and 29, that is, a length substantially the same as the width of the sheet 21, and the mating portions 28 and 29 respectively. A thermocompression-bonding adhesive punched into a ribbon having a width narrower than the width is used. As the adhesive of this type, for example, a thermocompression-bonding film adhesive can be preferably used.

Next, the longitudinal end portions of the flat tubular intermediate product produced by the above procedure are placed between the other longitudinal end portion of the sheet 21 having the fitting portion 29 and the sixth fold line 27. Part 30 is folded back so as to be overlapped, and the hot-melt adhesive 33 made of the thermocompression-bonding film adhesive is sandwiched between the double-folded part 32 and the part 30 to generate heat. Applying pressure, both parts 30, 3
Glue two. The adhesive 33 also includes both parts 30,
A shape corresponding to the shape of the bonded portion formed by bonding 32, that is, a ribbon having a length substantially the same as the length of the double-folded portion 32 and a width narrower than the width of the double-folded portion 32 is punched out. Used.

The dust bag 12 is manufactured by the above procedure. Then, the dust collecting filter 4 is formed by attaching the mouth frame 11 to the dust collecting bag 12. This attachment is performed by sandwiching the hot melt adhesive 34, which is the thermocompression-bonding film adhesive, between the back surface of the mouth frame 11 and the peripheral portion of the inlet 12a of the dust bag 12, and applying heat and pressure to the mouth. This is performed by bonding the frame 11 and the dust bag 12 together. The adhesive 34 has a shape corresponding to the shape of the adhesive portion formed by adhering the mouth frame 11 and the dust bag 12, that is, a small shape less than the projected area of the mouth frame 11 as shown in FIG. And
It is used by punching into a continuous ring. The dust collecting filter 4 produced by the above procedure is shown in FIGS.

As described above, the dust collecting filter 4 includes the joining portions 28, 29 of the sheet 21 forming the dust collecting bag 12, the bonding portion between the sheets, and the double-folded portion 32 of the sheet 21 and the overlapping portion 30 thereof. The adhesive portions of are adhered using hot melt adhesives 31 and 33. The adhesives 31 and 33 responsible for this adhesion do not contain a volatile component, and do not exhibit an adhesive function at room temperature, and maintain a solid state formed in a ribbon shape corresponding to the shape of the adhesive portion. Then, the adhesives 31 and 33 are melted in a liquid state by the heating and pressurizing and permeate between the fibers of the portion to be adhered, and when cooled, they are solidified to exert an adhesive function, and are aligned in the ribbon shape. The parts 28 and 29 are bonded. for that reason,
There are few adhesion defects such as insufficient adhesive strength and protrusion due to variations in the coating amount. Further, the bonding portion between the mouth frame 11 of the dust collecting filter 4 and the dust collecting bag 12 is also adhered in a ring shape by using the hot melt adhesive 34. Therefore, for the same reason as above, the mouth frame 11 is adhered. There are few adhesive defects such as insufficient adhesive force and sticking out due to variations in the coating amount in the adhesion between the dust bag 12 and the dust collecting bag 12.

Therefore, the dust collecting filter 4 having the above-mentioned structure is
The dust collecting bag 12 will not be inflated properly due to being bonded to other portions than the predetermined adhesive portion, and the strength of the predetermined adhesive portion will be locally reduced, and the dust collecting bag 12 will not be inflated. There is no fear that the dust bag 12 will be torn, and further, the adhesive strength between the mouth frame 11 and the dust collecting bag 12 will be partially reduced, and the dust bag 12 will not be peeled off from the mouth frame 11, and therefore high quality is achieved. is there.

Therefore, in the electric vacuum cleaner 1 using the dust collecting filter 4 having the above structure, the frequency of exchanging the dust collecting filter 4 can be reduced, and most of the dust sucked together with the suction airflow is driven by the electric blower 3. There is no danger of it being sucked into and causing a malfunction.

Further, since the thermocompression-bonding hot melt adhesives 31, 33, and 34 used in the above-described embodiment exhibit adhesive strength simultaneously with thermocompression bonding, there is no need for equipment and time for drying. Also, because it does not contain volatile components,
It does not require safety and hygiene management for odors, air pollution, fire, etc., and since it maintains a dry state where adhesives do not stick to each other at room temperature, it does not stick to hands, clothes, etc. The dust collecting filter 4 can be easily made manually by using.

In the above embodiment, the hot-melt adhesives 31, 33, and 34 are thermocompression-bonding type adhesives, but heat-reactive adhesives, particularly film-type adhesives, may be used instead. . This adhesive can be used for momentary temporary bonding by thermocompression bonding, so it may be bonded using a commercially available small thermocompression bonding machine and a heating furnace necessary for thermosetting.
Therefore, similar to the thermocompression type hot melt adhesive, no automated equipment for large-scale bonding is required.

[0036]

The present invention is carried out in the form as described above, and has the following effects.

According to the first aspect of the present invention, the adhesive portion between the sheets forming the dust collecting bag is formed in a solid shape corresponding to the shape of the adhesive portion, and a fixed amount of hot melt adhesive is applied. Since it is adhered using an adhesive, there are no adhesive defects such as insufficient adhesive strength and protrusion due to variations in coating amount,
It is possible to provide a high-quality filter for a vacuum cleaner.

According to the second aspect of the present invention, the solid hot-melt adhesive is used in which the adhesion portion between the dust bag and the mouth frame is formed in a ribbon shape corresponding to the shape of the adhesion portion. Since they are adhered, there is no adhesion failure due to insufficient adhesion due to variations in the coating amount, and a high-quality vacuum cleaner filter can be provided.

According to the invention of claim 3, since the dust collecting filter according to claim 1 or 2 which is of high quality without adhesion failure is used by being housed in the dust collecting chamber, the adhesion failure of this dust collecting filter is achieved. It is possible to provide an electric vacuum cleaner capable of avoiding various problems caused by.

[Brief description of drawings]

FIG. 1 is a perspective view showing an electric vacuum cleaner according to an embodiment of the present invention.

2A is a plan view showing a dust collecting filter provided in the electric vacuum cleaner of FIG. 1. FIG. 2B is a rear view of the dust collecting filter of FIG.

FIG. 3 is a sectional view of the dust collecting filter taken along line XX in FIG.

FIG. 4 is a sectional view of the dust collecting filter taken along line YY in FIG.

5A is a development view of a sheet forming a dust collecting bag included in the dust collecting filter of FIG. 5B to 5D are shown in FIG.
FIG. 6 is a perspective view showing in sequence the steps of making a dust collecting filter using the sheet of FIG.

[Explanation of symbols]

1 ... vacuum cleaner 2 ... Vacuum cleaner body 2b ... Dust suction port 3 ... Electric blower 4 ... Dust collection filter 11 ... mouth frame 11a ... suction opening 12 ... Dust bag 12a ... opening 21 ... Sheet 28, 29 ... Fitting section 31, 33, 34 ... Hot melt adhesive 32 ... Folded part

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shoji Fujita             3-1-11 N Nihonbashi Ningyocho, Chuo-ku, Tokyo             TT Building Satsuki Tokyo Branch F-term (reference) 3B062 AA09 AB13 AB39

Claims (3)

[Claims] 1. A mouth frame formed with a suction opening, and a sheet made of a filter material having air permeability and formed into a bag shape having an inlet facing the suction opening, and a peripheral portion of the inlet is the mouth. In a dust collecting filter for a vacuum cleaner, which comprises a dust bag adhered to a frame, the dust bag has an adhesive portion between the sheets, and the adhesion of the adhesive portion corresponds to the shape of the adhesive portion. A dust collecting filter for a vacuum cleaner, characterized in that it is made by using a hot melt adhesive having a predetermined shape. 2. A mouth frame formed with a suction opening, and a sheet made of a filter material having air permeability, which is formed into a bag shape having an inlet facing the suction opening, and a peripheral portion of the inlet is the mouth. In a dust collecting filter for a vacuum cleaner, which comprises a dust collecting bag adhered to a frame, an adhesion portion between the dust collecting bag and the mouth frame is an annular hot that is defined in a small shape that is equal to or less than a projected area of the mouth frame. A dust collecting filter for a vacuum cleaner, wherein the dust collecting filter is adhered using a melt adhesive. 3. A cleaner main body having a dust suction port and a dust collection chamber communicating with the dust suction port, which houses an electric blower located downstream of the dust collection chamber and collects the dust in the dust collection chamber. An electric vacuum cleaner that houses a dust filter and captures the dust sucked together with the airflow through the dust suction port by the dust collecting filter, wherein the dust collecting filter according to claim 1 or 2 is used. Vacuum cleaner.