JPH11206653A - Dust collection filter for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collection filter for vacuum cleaner wherein a bag body can be expanded very rapidly by a suction pressure. SOLUTION: The opposite open ends of a cylindrical body with transversely long folds, to which a supporting plate 2 is attached, are closed to form a dust collection filter, in the form of a bag body 1, for vacuum cleaner. And first fold grooves 3a, 3a are formed over the entire width of the bag body in such a manner that each of the grooves 3a is spaced apart from each closed end of the bag body 1 toward the center thereof by a distance corresponding to the width of the fold. And a second fold groove 3b is formed parallel with the first fold groove 3a so as to be spaced apart from the groove 3a by a distance corresponding to the width of the fold. The bag body 1 is closed along the grooves 3b and the folds are fully expanded along the grooves 3a to form a rectangular bottom at the closed opposite ends and each of the bottoms is folded in two along a fold 1c of the closed end of the bag body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust filter for a vacuum cleaner (hereinafter, referred to as a filter), and more particularly to an improved filter having a structure which is easy to open when dust-containing air is inhaled.

[0002]

2. Description of the Related Art Conventionally, as a disposable filter used in a vacuum cleaner, a bag in which a suction port is provided on one wall surface of a horizontally long tubular body to which a breathable material is attached, and both open ends thereof are closed. A support plate having an opening approximately the same size as or larger than or smaller than the suction port is attached to the suction port of the body, and both ends of the bag body including the both closed ends are attached to the support plate. The one that is folded on the back side of the support plate is most often used. A filter in which both ends of a bag constituting the above-described filter are folded on the back side of the support plate is shown in, for example, FIG. 19c of JP-A-63-76245. Shape (see Figure 5),
(B) The shape shown in FIG. 19 of JP-A-56-130128 (see FIG. 6). (C) As shown in FIG. On the rear side, there is one that is folded such that both ends thereof fold over each other.

[0003]

Recently, the performance of filter paper, which is a gas permeable material constituting a filter, that is, the performance of capturing dust (capturing finer dust than before) and the permeability have been improved. Therefore, when the filter inhales air containing dust, a part of the air escapes to the outside through the vicinity of the suction port, particularly through the opposite wall of the suction port, and the pressure of the air in the bag decreases. There is a problem that both ends of the folded bag are difficult to open. This is because the air blown from the inlet is turned by 90 ° in order to spread the folded both ends 3.
The present invention has been made in view of such circumstances, and a problem thereof is to provide a dust collection filter for a vacuum cleaner that can reliably open a bag body when air containing dust is blown, without blowing air. To provide.

[0004]

In order to solve the above-mentioned problems, a dust collecting filter for a vacuum cleaner according to the present invention is provided with one or more layers of breathable material attached to the body (1b), and V-shaped on both sides. A tubular body having a folded fold (1d) is formed on one side, an inlet (1a) is provided on one wall surface, and both open ends of the tubular body are bent and attached. In a dust filter for a vacuum cleaner having a rigid support plate (2) having an opening (2a) adhered to the suction port of the closed (1c) bag body (1), both closed ends of the bag body A first fold groove (3a) is provided at a position closer to the center of the bag body from the edge (1c) by a distance corresponding to the depth (G) of the fold over the entire width of the bag, and further from the first fold groove. The second folded groove (3) spanning the full width of the bag at a position close to the center of the bag by a distance corresponding to the depth of the fold.
b), keeping the bag containing the folds on both sides closed along the second fold, while along the first fold,
The folds at both sides are fully expanded to form both closed ends of the bag into a rectangular bottom surface, and the bottom surface is used as a fold line (1c) of the closed edge located at the center thereof, and a fold line of a valley. It is characterized by being folded.

[0005] Even if the closed end of the dust collecting filter for a vacuum cleaner of the present invention is of a type in which the open end is folded twice and the bent portion is stuck on one wall of the bag, Also, for example, a hot melt adhesive is applied to the inner surface of the bag at the open end to be closed, and the inner surface of the bag is bonded and sealed. The sealed portion is bent once, and the bent portion is placed on one side of the bag. It may be of a type to be stuck on the wall of a. Further, in the filter of the present invention, the support plate and the bag are bonded with an appropriate width along two opposite sides of the support plate so that the support plate can be mounted on the filter mounting portion of the vacuum cleaner as necessary. There is a part that is not performed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto. 1 is a perspective view of a dust filter for a vacuum cleaner according to an embodiment of the present invention, FIG. 2 is a perspective view of the dust filter of FIG. 1 in a state before both ends are folded, and FIG. 3 is FIG. 1 and 2 for explaining a procedure for folding the closed end portion of the dust collecting filter of FIG. 1 to the state shown in FIG. 1, and FIG. 1 and FIG. The left half of the dust filter is shown. In addition,
A, B, and C are diagrams showing the state of each stage of the process. FIG.
FIG. 2 is a schematic sectional view showing a state where air is blown into the dust collection filter of FIG. 1.

In the figure, reference numeral 1 denotes a bag, 1a denotes an inlet, 1b
Is a closed part of the body, 1c is a closed end or a closed edge or a fold of the closed edge, 1d is a fold or fold line, 2 is a support plate, and 2a is an opening of the support plate. Part, 2b is a non-adhesive part of the support plate 2 to the bag 1, 3 is (both) ends of the bag,
3a is the first fold groove, 3b is the second fold groove, G is the depth of the fold, P
Is an adhesive, and Q is a bottom surface.

The dust collecting filter shown in FIG. 2 is composed of a horizontally long cylindrical body having one or more layers of air-permeable material attached to its body 1b and having V-shaped folds 1d on both sides, and suction on one wall surface. A mouth 1a is provided, and both open ends are bent twice, rolled up, adhered to the wall surface of the cylindrical body and closed 1c. A rigid support plate 2 having an opening 2a is attached with an adhesive P (see FIG. 4). In addition, since the dust collecting filter attaches the support plate to the filter attachment portion of the vacuum cleaner, a portion 2b is provided along the two opposing sides with an appropriate width to which the support plate 2 and the bag 1 are not bonded. . There is no difference between the above-described configuration and a conventionally available dust filter for a vacuum cleaner.

A feature of the dust collecting filter for a vacuum cleaner according to the present invention lies in how the both ends 3 of the bag are folded. That is, FIG.
As shown in FIG. 2, a first fold groove 3a is provided across the entire width of the bag at a position closer to the center of the bag by a distance corresponding to the depth G of the fold from both end edges 1c of the bag. A second fold groove 3b, which extends over the entire width of the bag, is provided near the center of the bag body by a distance corresponding to the depth G of the fold from the one fold groove.

Then, as shown by an arrow in FIG. 3A, the bag 1 including the folds 1d on both sides of the bag 1 is closed along the second folding groove 3b across the entire width thereof. Keeping it, on the other hand, when the fold 1d is fully expanded along the first fold groove 3a,
As shown in FIG. 3B, a rectangular bottom surface Q is formed at both closed ends 1c of the bag body 1. Next, as shown in FIG. 3C, the rectangular bottom surface Q is folded in half with the fold 1c of the closed edge located at the center thereof as the fold line of the valley, thereby folding the bottom surface Q of the present invention shown in FIG. A dust filter for a vacuum cleaner is obtained.

It is reasonable that the above-mentioned step of folding both ends 3 of the bag is performed before the support plate 2 is attached to the bag 1. The rectangular bottom surface Q can also be formed on the upper or lower surface of the bag (in FIG. 3). In addition, both ends 3 of the bag body of the dust collecting filter of the present invention are coated with, for example, a hot-melt adhesive on the inner surface of the bag wall at the opening end of the cylindrical body to be closed to bond the inner surfaces of the bag walls at both ends. It may be sealed, folded once, and the folded portion may be stuck on one wall of the bag and closed. The opening of the support plate may be larger or smaller than the size of the suction port of the bag body, or may be the same size.

[0012]

When the dust collecting filter is mounted on a vacuum cleaner and used, unlike the conventional dust collecting filter in which both ends 3 of the bag body are folded on the back surface of the support plate 2, it is blown. The air flow does not turn 90 degrees,
Straightly hits the bag wall facing the suction port, straightly expands the folds formed by folding the folds 1d on both sides of the bag body and the folds 1c on the closed edge into the inside to expand the dust collection filter fully. be able to. As described in detail above, according to the present invention, it is possible to provide a dust filter for a vacuum cleaner in which, when air containing dust is blown, the bag is instantaneously expanded by the air pressure.

[Brief description of the drawings]

FIG. 1 is a perspective view of a dust filter for a vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a perspective view of a state before folding both end portions of the dust collection filter of FIG. 1;

FIG. 3 is a schematic end view for explaining a process of folding a bottom portion of the dust collecting filter of FIG. 2, and A, B, and C are views showing states of respective stages of the process.

FIG. 4 is a schematic sectional view showing a state where the dust collecting filter of FIG. 1 is expanded.

FIG. 5 is a perspective view of a first prior art dust collection filter.

FIG. 6 is a perspective view of a second prior art dust collection filter viewed from the back side of a support plate.

FIG. 7 is a perspective view of a third prior art dust filter.

[Explanation of symbols]

1: bag, 1a: suction port, 1b: body sticking, 1c: closed end or closed edge or fold of closed edge, 1d: fold or fold line, 2: support plate, 2a: opening, 2b: non-adhesive part, 3: end of bag, 3a: first fold groove, 3b: second fold groove, G: depth of fold, P: adhesive, Q: bottom surface

Claims (1)

[Claims] Claims: 1. An air-permeable material of one layer or a plurality of layers is attached to a body, and a laterally elongated cylindrical body having V-shaped folded folds is formed on both sides, and an intake port is provided on one wall surface thereof. In addition, in the dust collecting filter for a vacuum cleaner, a rigid support plate having an opening is attached on the suction port of the closed bag by bending both open ends of the cylindrical body. A first fold groove extending over the entire width of the bag is provided at a position closer to the center of the bag body at a distance corresponding to the depth of the fold from both closed edges of the bag body, and further folds are formed from the first fold groove respectively. A second fold groove is provided over the entire width of the bag at a position close to the center of the bag for a distance corresponding to the depth, and the bag body including the folds on both sides is kept closed along the second fold groove. On the other hand, along the first folding groove, the folds on both sides are fully expanded to form both closed ends of the bag into a rectangular bottom surface, and the bottom surface is formed. A dust collecting filter for a vacuum cleaner, wherein a fold of a closed edge located at the center thereof is a fold line of a valley, and folded in two.