JPH0795989B2 - Vacuum cleaner dust bag - Google Patents

Description

TECHNICAL FIELD The present invention relates to a dust bag of an electric vacuum cleaner including an inner bag and an outer bag.

(Prior Art) Conventionally, the dust collecting bag formed in multiple layers of this kind of vacuum cleaner has a front side and a back side of one material when making an outer bag material having a relatively high density and thickness. It has a multi-layer structure in which the density is changed between two layers to form a two-layer structure, and the two-layer material is further laminated. Also,
2. Description of the Related Art There is known a dust collecting bag having a structure in which materials having different characteristics are separately attached to a roll during bag-making and bonded at the same time as bag-making.

(Problems to be solved by the invention) However, in this seed dust bag, it is preferable that voids are formed between the layers from the viewpoint of dust absorption efficiency. In, the material itself is made into multiple layers when making paper, so that the layers are adhered to each other and voids are not formed between layers, and interlayer voids do not occur due to external force such as expansion and contraction due to dust suction pressure or wind pressure during use. Therefore, a significant increase in dust collection efficiency cannot be expected.

On the other hand, what is attached to the above-mentioned conventional material on separate rolls and laminated at the same time as bag making, when using a thick material of the material when forming the inner bag in a multi-layer, one with a high density,
It cannot be used as a dust bag for a vacuum cleaner due to increased ventilation resistance. For this reason, it is necessary to use a thin material for the inner bag, and in the case of a thin material, when the material is sandwiched between the rolls in the bag manufacturing process and processed while applying tension, the material may burst or become There is a problem in that holes are opened, and the density of the material is low, so that the tensile strength becomes uneven, and the material is bent and deformed in the bag making process and cannot be processed.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a cheap dust collecting bag for an electric vacuum cleaner, which has a short bag making process and a high dust collecting efficiency.

(Means for Solving Problems) A dust collecting bag for an electric vacuum cleaner according to the present invention includes an outer bag formed of a material having air permeability and relatively high density, and an air bag having air permeability and relatively high density. Is composed of an inner bag formed by stacking a plurality of materials having a low thickness and a thickness smaller than that of the outer bag. It has been fixed firmly.

(Operation) In the dust collecting bag of the electric vacuum cleaner of the present invention, since the inner bag is formed by fixing the multi-layered material, the inner bag can be handled as one material, and each material is extremely thin and weak in strength. In addition to being integrated with other materials, the desired strength can be obtained, and since the voids are retained between the layers of the multi-layered material of the inner bag, the inner bag materials are fixed to each other and the dust collection efficiency between the materials is improved.

(Embodiment) Hereinafter, a configuration of an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a dust bag, which is made up of an outer bag 2 and an inner bag 3. The front opening of the dust bag 1 is attached to a cleaner body. The supporting plate 4 is fixedly attached, and the supporting plate 4 has a dust suction port 5 formed therein.

The outer bag 2 has a relatively high density such as a non-woven fabric formed of a combination of natural fibers and chemical fibers such as hemp fibers, pulp, cotton, rayon, polypropylene resin fibers and glass fibers added as necessary. Composed of materials.

On the other hand, the inner bag 3 is made by stacking relatively thin and thin materials 6 and 7 such as a non-woven fabric formed by a combination of hemp fiber, rayon and pulp, glass fiber, natural fiber such as polypropylene, and chemical fiber. This multi-layered material formed
It is formed by partially fixing 6 and 7 over each other before bag making. Then, the material of the inner bag 3 which is overlapped
6,7 are composed of different combinations of fiber type, fiber length, fiber diameter, basis weight, air permeability such as air permeability, and the material 7 of the inner inner bag 3 is the material of the outer inner bag 3. The inner inner bag 3 made of a material having a pore size larger than that of 6 and a larger pore size
The material 6 is formed to have coarser eyes than the material 7 of the inner bag 3 on the outside.

Further, as shown in FIG. 2, the materials 6 and 7 of the inner bag 3 are partially adhered to each other over the entire surface before the bag is made, or the materials 6 and 7 are
It is fixed by welding with a thermoplastic resin such as polypropylene mixed in 7, or by entanglement of fibers by needle punching 11 as shown in FIG. In this case, when the inner bag 3 is composed of three or more layers of materials, the materials of all the layers can be fixed at the same time, or the materials of adjacent layers can be sequentially fixed.

If the materials 6 and 7 have many natural fibers, adhesive fixation is suitable, and if there are many chemical fibers and the adhesiveness is low, fusion fixation is performed, natural fibers and chemical fibers are mixed, or glass fibers are mixed. In addition, needle punching is suitable for materials 6 and 7, which have poor air permeability due to adhesion and welding.

Further, since the materials 6 and 7 of the inner bag 3 are firmly fixed to each other, it is possible to enhance the dust collecting effect by appropriately forming the voids 8a between the layers of the materials 6 and 7, and therefore, as shown in FIG. 4 and FIG. It is preferable to bond 9 the raw materials 6 and 7 in the pattern as shown, or weld 10 the raw materials 6 and 7 in the pattern as shown in FIGS. 6 and 7.

In this way, the materials 6 and 7 of the inner bag 3 can easily include glass fibers sandwiched between natural fibers or thick glass fibers or natural fibers between chemical fibers. The three-dimensional structure of the dust collecting bag 1 can be arbitrarily selected.

Furthermore, the materials 6 and 7 of the inner bag 3 are made by blending fibers having antibacterial properties, which are impregnated with diphenyl ether chemicals which are organic compounds of halogenated bisphenols.
Since the entire inner bag 3 has an antibacterial effect, it is possible to prevent the generation of odor from the inhaled dust.

In addition, the materials 6 and 7 of the inner bag 3 are made by applying a cyclodextrin to synthetic resin fibers and laminating a fiber containing a pesticide such as fenitrothion, or a material mixed with fibers containing various fragrances. 3, insecticidal effect,
Aroma can also be imparted.

Furthermore, when the materials 6 and 7 of the inner bag 3 are fixed with an adhesive, the bactericidal effect can be obtained by directly mixing the adhesive with an insecticide or an antibacterial agent, or by mixing a microencapsulated insecticide or a fragrance. As a result, the dust collecting bag 1 having an aroma action is obtained.

As shown in FIG. 8, the dust bag 1 is expanded into a rectangular plate shape, and has an upper surface portion 13, a side surface portion 14, a lower surface portion 15,
The side surface portion 16 and the fixing portion 17 are formed by parallel bending lines 18 to 21, and the closed bottom portion 22 is formed on one edge of the upper surface portion 13, the lower surface portion 15, the side surface portions 14, 16 and the fixing portion 17. A plurality of bending lines 23 to be formed are an upper surface portion 13, a lower surface portion 15, side surface portions 14 and 16, and a fixing portion 17.
Is formed in a direction orthogonal to the bending lines 18 to 21 forming the.

Further, the upper surface portion 13, the lower surface portion 15, the side surface portions 14 and 16, the fixed portion 17
A fold line 25 forming the front face portion 24 is formed on the other edge side of the ridge line in a direction orthogonal to the fold lines 18 to 21 forming the upper face portion 13, the lower face portion 15, the side face portions 14 and 16, and the fixing portion 17. ing.

In addition, gusset valley fold lines 26 and 27 parallel to the fold lines 18 to 21 are formed on the side surface portions 14 and 16.
Bending line forming the front part 24 in a V shape on the other end side of 6,27
Valley-folded fold lines 28 and 29 are formed toward 25, and these fold lines 28 and 29 extend to the front surface portion 24. Further, a concave arc-shaped notch 30,3 forming a dust suction opening 32 at the edge corresponding to the upper surface portion 13 and the lower surface portion 15 of the front surface portion 24.
1 is formed. A seal portion 34 is formed on the front surface portion 24. The outer bag 2 and the inner bag 3 are adhered to each other along the entire circumference of the dust suction opening 32 along the edges thereof by adhesion or the like. Further, reinforcing adhesive portions 35 are formed at both ends of the concave arc-shaped notches 30 and 31.

Next, the operation of the bag making according to the above-described embodiment will be described.

When making the dust-collecting bag 1, the folding box 18 to 21 is bent to bond the fixing portion 17 to the edge of the upper surface portion 13, and the upper surface portion 13, the lower surface portion 15, both side surface portions 14, 16 are rectangular boxes. The both sides 14 and 16 are valley-folded from the fold lines 26 and 27, and the closed bottom 22 is formed from the plurality of fold lines 23 by fold adhesion or the like.

Next, the front part 24 is bent from the bending line 25, and the extension parts of the V-shaped bending lines 28 and 29 are bent, and the parts corresponding to the upper surface part 13 and the lower surface part 15 correspond to the both side surface parts 14 and 16. Stack on the upper side of the part to be used. Then, as shown in FIG. 9, the front portion
A support plate 4 to be mounted on the main body of the vacuum cleaner is fixed to 24 by adhesion or the like, and a dust suction opening 5 of this support plate 4 is formed by concave arc-shaped cutouts 30 and 31 of the dust collecting bag 1. Match with.

Next, the operation of the above embodiment will be described.

When the dust suction port 5 of the support plate 4 is attached to the suction port of the dust collecting portion of the electric vacuum cleaner and the electric blower is driven, the dust that has been sucked into the inner bag 3 from the dust suction opening 32 of the dust collecting bag 1. Will be introduced to.

In the inner bag 3 made of the multi-layered materials 6 and 7, the inner material 7 is formed of a material having a larger pore size than the outer material 6, and the inner material 3 of the inner bag 3 is the material 7 of the outer inner bag 3. Since it has a coarser mesh, it is sequentially filtered from the larger dust particles 33, and as shown in FIG. 10, the captured dust particles 33 are collected in the space 8a between the materials 6 and 7 of the inner bag 3, and The air collected in the space 8b between the inner bag 3 and the outer bag 2 and filtered passes through the outer bag 2. And the space 8 between each material 6 and 7 of this inner bag 3
a. The permeated airflow becomes a turbulent flow in the space 8b between the inner bag 3 and the outer bag 2, and the permeated airflow changes its speed at various places during the permeation, so that the dust collection efficiency can be increased and the dust absorption amount can be increased. As described above, the amount of fine dust passing through the inner bag 3 and reaching the outer bag 2 is extremely small, and the collision speed with the outer bag 2 is slow, so that the dust leakage from the dust collecting bag 1 is small and the trapping efficiency is improved. it can. Furthermore, a bag-making machine for the inner bag 3 is not required for each of the materials 6 and 7, the manufacturing process can be shortened, and the bag can be formed at low cost.

Further, by fixing the outer bag 2 and the inner bag 3 along the entire circumference of the dust suction opening 32, the outer bag 2 does not pass through the inner bag 3.
It is possible to prevent dust from flowing between the inner bag 3 and the inner bag 3, and improve the dust collection performance.

On the other hand, according to the experimental results of the conventional dust collecting bag and the dust collecting bag 1 of the present embodiment, the change characteristic of the air volume and the dust collecting amount is as shown in FIG. In comparison, the characteristic b of the dust bag 1 of the present embodiment not only increases the amount of collected dust, but at the same time, as shown by the shaded area, the attenuation of the air volume of this embodiment is also the linear attenuation of the conventional dust bag. In contrast, it can be seen that the attenuation curve has a small pressure loss and the dust collection performance is obtained.

In the above embodiment, the inner bag 3 has been described as having a structure in which two layers of materials 6 and 7 are stacked, but the structure is not limited to this structure, and the material may have three or more layers.

(Effects of the Invention) According to the dust bag of the electric vacuum cleaner of the present invention, the outer bag formed of a material having air permeability and relatively high density, and the outer bag having air permeability and relatively low density. Stack multiple thinner materials,
The inner bag is made of multiple layers because it consists of an inner bag formed by partially holding the entire surface with a gap between the materials.
The dust collection performance can be enhanced by the appropriate gap between the layers, and the dust trapping effect can be extremely enhanced.

[Brief description of drawings]

FIG. 1 is a perspective view in which a part of a dust collecting bag according to an embodiment of the present invention is cut away, FIG. 2 is an enlarged sectional view of part of the same, and FIG. 3 is a dust collecting bag illustrating another embodiment. 4 is a cross-sectional view of a part of FIG.
Fig. 8 is a developed view of the dust bag, Fig. 9 is a front view of the same as assembled state, Fig. 10 is an enlarged cross-sectional view showing the dust trapped state of the dust bag, and Fig. 11 is the air volume of the dust bag. It is a dust absorption amount change characteristic diagram. 1 ... Dust collection bag, 2 ... Outer bag, 3 ... Inner bag, 6,7 ... Material, 8a ... Void, 32 ... Dust suction opening.

Claims (3)

[Claims] 1. An outer bag formed of a material having air permeability and a relatively high density, and a material having air permeability and having a relatively low density and a thickness smaller than that of the outer bag. A dust collector for an electric vacuum cleaner, comprising: an inner bag formed by stacking a plurality of the inner bags, wherein the material of the inner bag is partially fixed over the entire surface with a gap maintained between the materials. bag. 2. The dust bag for an electric vacuum cleaner according to claim 1, wherein the outer bag and the inner bag are fixed along the entire circumference of the dust suction opening. 3. The electric vacuum cleaner according to claim 1 or 2, wherein the inner bag material in which the inner bag material is superposed has a coarser mesh than the outer bag material. Dust bag.