JPH0713777Y2 - Bag-shaped air filter unit - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is for a bag-shaped air filter in which a predetermined number of bag-shaped (bag-shaped) filter media for air filters are consecutively fixed in order to correspond to a filter frame. The present invention relates to a filter medium unit.

[Prior Art] Conventionally, as a filter material for a bag-shaped air filter that constitutes a filter material unit for a bag-shaped air filter, for example,
The ones shown in FIGS. 9 to 9 were known.

FIG. 8 is a perspective view of a bag-shaped filter material for an air filter, and FIG. 9 is a sectional view taken along line II-II in FIG. A conventional bag-shaped filter material for an air filter will be described below.

Fold the rectangular filter paper into two equal halves
21a, 21b and a bent edge 22 are provided, and the upper and lower edge portions 23a, 23b of each bent piece 21a, 21b are sewn and fixed with a thread 24 by sewing, and a bag having an opening 25 on the front surface. The portion 26 is formed, and further without making the bent pieces 21a, 21b of the bag portion 26 adhere to each other,
At a position where each of the bent pieces 21a, 21b can be equally divided in the vertical direction so as to have a void 27 and can be held in a cross-sectional wedge shape, a thread is formed from the bent edge 22 of the bag 26 to the opening 25. The length of the yarn 28 inserted into the void portion 27 of the bag portion 26 is gradually increased from the bent end edge 22 to the opening portion 25 by adjusting the length by 28, and The bent pieces 21a, 21b are sewn together over several lines, and an adhesive 29 is applied to the sewn portion by the threads 24, 28 exposed on the outer surface of each of the bent pieces 21a, 21b to reinforce the sewn portion. Bag-shaped air filter media 30
Are formed.

The length of the thread 28 inserted into the void portion 27 of the bag portion 26 is configured to gradually increase from the bent end edge 22 to the opening portion 25, which is a conventional configuration having the above configuration. When a plurality of bag-shaped air filter filter media 30 are connected at their openings 25 end portions to form a bag-shaped air filter filter media unit 31, the bag parts 26 are inflated by blowing air, so that filter media adjacent to each other are formed. This is in order to prevent the effective filtration area during ventilation from becoming small.

Then, in order to form a bag-shaped air filter filter medium unit 31 by continuously connecting a plurality of bag-shaped air filter filter media 30 having the above-mentioned configuration, as shown in FIG. A plurality of edges formed by overlapping the edges of the openings 25 of the filter medium 30 and sandwiching them by two metal sandwiching bars 32, 32, and bending one of the sandwiching bars 32 at intervals. The claws 33 are fixed by penetrating and bending the claws 33 into the holes (not shown) formed in the other nipping bar 32, and a plurality of bag-shaped air filter filter materials 30 are connected in series to form a bag-shaped air filter. The filter medium unit 31 is formed. Further, as shown in FIG. 11, the bag-shaped air filter filter unit
A bag-shaped air filter main body 35 is formed by fixing 31 to the filter frame 34 with the sandwiching bars 32, 32 in a grid pattern over a plurality of sets.

[Problems to be Solved by the Invention] However, the bag-shaped air filter filter medium constituting the conventional bag-shaped air filter filter medium unit requires a complicated mechanism for manufacturing the bag-type air filter filter medium, and the sutured portion is bonded by a thread. It is necessary to apply and reinforce the agent, and there is a risk of friction and damage on the surface of the filter medium already during the manufacturing process, resulting in a decrease in pressure resistance and service life and a decrease in work efficiency. There were problems such as.

Furthermore, since the material of the conventional filter medium unit 31 for bag-shaped air filters is glass fiber, the material is weak and one side end of the opening 25 of the filter medium 30 for bag-shaped air filters adjacent to each other. Since it is impossible to polymerize the above, and to fix them by welding with an ultrasonic sewing machine or a high-frequency sewing machine to form a bag-shaped air filter filter medium unit, as described above, two opening portions 25 of each bag-shaped air filter filter medium 30 are provided. It is necessary to adopt a means of sandwiching with the metal sandwiching bars 32, 32 and fixing with a plurality of claws 33, which is very time-consuming and therefore costly. .

The present invention is intended to provide a bag-shaped filter medium unit for an air filter, which is intended to solve the conventional problems.

[Means for Solving the Problems] The present invention is to fold a rectangular filter paper made of synthetic fiber non-woven fabric into two equal parts to provide two bent pieces and a bent edge, and each bent piece. The upper and lower edges of each of the above are welded and fixed by an ultrasonic sewing machine or a high-frequency sewing machine to provide end welding lines to form a bag portion having an opening on the front surface, while each bent piece of the bag portion is moved up and down. At a position where it is equally divided in the horizontal direction, a plurality of long and short welding lines are alternately provided by welding and fixing with the ultrasonic sewing machine or the high-frequency sewing machine from the bent edge to a position slightly before the opening edge. To form a filter medium for a bag-shaped air filter by continuously arranging large, medium, and small voids from the opening side toward the bent edge, respectively, and further forming a filter medium for a bag-shaped air filter adjacent to each other. Connect one end of each opening to an ultrasonic or high-frequency sewing machine. The above-mentioned problems have been solved by adopting a means of fixing by welding to provide a joining welding line and successively fixing a plurality of bag-shaped filter media for air filters.

[Operation] According to the present invention having the above-described configuration, the welding process using an ultrasonic sewing machine or a high-frequency sewing machine is performed without using a sewing thread or an adhesive, forming a substantially cross-sectional wedge shape and maintaining a large effective filtration area. A bag-shaped filter medium for air filters can be obtained, and a predetermined number of the filter medium for bag-shaped air filters can be continuously connected and fixed without using a fixing member to obtain a filter unit for bag-shaped air filters.

In addition, friction and damage to the filter medium surface during the manufacture of the filter medium unit for the bag-shaped air filter are prevented.

[Embodiment] An embodiment of the present invention will be described in detail with reference to the drawings. A bag-shaped air filter filter medium unit according to the present invention comprises a plurality of bag-shaped air filter mediums and adjacent bag-shaped air filters. It is formed by welding and fixing one end of the filter material on one side of the opening.

The bag-shaped filter material for an air filter is configured as follows.

A rectangular filter paper made of synthetic fiber non-woven fabric is folded into two equal parts, two folding pieces 1a and 1b and a folding edge 2 are provided, and each folding piece 1a and 1b is placed on each side. The lower end edges 3a and 3b are welded and fixed by an ultrasonic sewing machine or a high frequency sewing machine, end welding lines 4a and 4b are provided, and a bag portion 6 having an opening 5 on the front surface is provided.
To form.

Then, at a position where each of the bent pieces 1a, 1b of the bag portion 6 is equally divided vertically in the vertical direction, from the bent edge 2 to a position slightly before the edge of the opening 5, the ultrasonic sewing machine or the high frequency sewing machine is used. , The bent pieces 1a, 1b are fixed by welding, and a plurality of long and short welding lines 7a, 7b are alternately provided, and the upper and lower ends from the opening 5 side toward the bent end edge 2 A large void portion 8 defined by the partial welding lines 4a, 4b, an intermediate void portion 9 defined by the end welding lines 4a, 4b and a long welding line 7a, and the end welding lines 4a, 4b, and each length, Small void portions 10 defined by the short welding lines 7a and 7b are arranged in series to form a bag-shaped filter medium 11 for an air filter.

As described above, a synthetic fiber non-woven fabric is used as the material of the filter material 11 for the bag-shaped air filter. In the case of synthetic fiber non-woven fabric, in addition to the welding process using the ultrasonic sewing machine or the high frequency sewing machine, sewing process using thread is also possible.
Welding with an ultrasonic sewing machine or a high-frequency sewing machine can be adjusted to the optimum welding state according to the conditions such as the material of the filter medium, the product state, and the thickness, and no adhesive for reinforcement is required. Therefore, since it is superior to the sewing process using thread, in the present invention, the synthetic fiber non-woven fabric is used as the material and the welding process using the ultrasonic sewing machine or the high frequency sewing machine is adopted.

In addition to the above, welding processing by heat is also possible,
Since this means may cause the temperature of the surface of the filter medium to become higher than that of the welded portion, and the filter medium may be melted to lower the strength, it is not so preferable and cannot be adopted in the present invention.

Then, a predetermined number of the bag-shaped air filter medium 11 having the above-mentioned structure is welded and fixed to one end of each opening 5 of the bag-shaped air filter medium 11 adjacent to each other by an ultrasonic sewing machine or a high-frequency sewing machine. Join welding line 12
And a plurality of bag-shaped air filter filter media (11) are connected in series to form a bag-shaped air filter filter media unit (13).

Although various means for fixing the bag-shaped air filter filter medium unit 13 to the filter frame 14 are conceivable, when the bag-shaped air filter filter medium unit 13 of the present invention is used, the means shown in FIGS. It is recommended to fix by the method shown.

First, as shown in FIG. 6, two upper and lower frame plates 14a and 14b of a filter frame 14 formed in a rectangular frame shape facing each other.
The same number of recesses 15 as the number of the welding lines 12 at the same intervals.
And a hooking plate 16 having projections 16a for fitting and locking the recesses 15 facing each other is provided at each tip, and each of the welding wires 12 is attached to each hooking plate 16. Place the back side of
The protrusions 16a are fitted and locked in the recesses 15, respectively, and the upper edge of each bent piece on the outer side of the bag-shaped air filter filter medium 11 located at both ends of the bag-shaped air filter filter unit 13 is bonded. Adhesives are fixed to the front sides of the two left and right frame plates 14b, 14b with an agent, and the upper and lower ends 5a, 5a of the openings 5 of the filter media 11 for bag-shaped air filters are cut open respectively.・ Fixed to the front side of the lower frame plates 14a, 14a, and further, as shown in FIG. 7, a rectangular holding frame on the front side of the filter frame 14.
The filter device 19 is formed by integrally fixing 17 with plastic staples 18, for example.

Next, the operation of the embodiment of the present invention will be described.

By forming the large, medium, and small voids 8, 9 and 10 in series, the bag-shaped air filter medium 11 has a substantially wedge-shaped cross section as shown in FIG. When a plurality of the openings 5 are connected in series to form the filter medium unit 13 for a bag-shaped air filter, even if the bag portion 6 swells due to the blown air, the filter mediums adjacent to each other do not come into contact with each other. It is possible to prevent the effective filtration area from becoming small, and it is possible to consecutively fix a plurality of bag-shaped filter media for air filters 11 by welding using an ultrasonic sewing machine or a high-frequency sewing machine without using a fixing fitting.

[Advantages of the Invention] Since the present invention is as described above, the bag-shaped filter material for the air filter is manufactured by welding the synthetic fiber non-woven fabric with an ultrasonic sewing machine or a high-frequency sewing machine so that a sewing thread and an adhesive as in the conventional case can be obtained. Since it is not necessary, the entire filter medium can be made into a simple structure with a uniform material, no dragging due to the yarn occurs during the manufacturing process, the number of work steps is reduced, and the work efficiency is improved. There is no fear of friction or damage on the surface of the filter medium due to, the strength is the same as that of the conventional product, and the pressure resistance and the service life can be improved.
In addition, since the bent pieces are welded and fixed to the bag-shaped filter material for air filters and a plurality of long and short welding lines are provided, large, medium, and small voids are formed in the bag portion, respectively. In addition, the bag portion is held in a substantially wedge-shaped cross section, which is an ideal shape of the filter material for a bag-shaped air filter. Furthermore, a plurality of the bag-shaped air filter media are welded and fixed at one end of the opening by an ultrasonic sewing machine or a high-frequency sewing machine, so that they can be connected and fixed in a very simple manner without using any fixing metal fittings. A bag-shaped filter medium for air filters can be formed, and since the bag-shaped filter media for air filters are held in a substantially wedge shape in cross section, they are adjacent to each other even if they are inflated by blowing air. It is possible to prevent the effective filtration area during ventilation from becoming small without contact with the filter material for the air filter.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a filter medium unit for a bag-shaped air filter of the present invention, FIG. 2 is a perspective view of a filter medium for a bag-shaped air filter that constitutes the filter medium unit for a bag-shaped air filter, and FIG. 1 is a sectional view taken along the line I-I, FIG. 4 is a plan view of the same, FIG. 5 is a left side view of the same, and FIG. 6 is a perspective view showing a state in which a filter medium unit for a bag-shaped air filter of the present invention is attached to a filter frame, 7 is a perspective view after completion of the same attachment, FIG. 8 is an overall perspective view showing a conventional filter material for a bag-shaped air filter, and FIG. 9 is a sectional view taken along line II-II in FIG.
FIG. 10 is an enlarged cross-sectional view of a main part showing a state in which a plurality of conventional bag-shaped air filter filter media are fixed in series, and FIG. 11 is a perspective view of a conventional bag-shaped air filter body. In the figure, 1a and 1b are bent pieces, 2 are bent edges, 3a and 3b are upper and lower edges, 4a and 4b are end welding lines, 5 is an opening, 6 is a bag, and 7a and 7b.
Is a long and short welding wire, 8, 9 and 10 are large, medium and small voids, 11 is a filter material for a bag-shaped air filter, 12 is a bonding welding wire, and 13 is a filter material unit for a bag-shaped air filter.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Hakama 3-7-6 Oyama, Sagamihara-shi, Kanagawa Nakazato Apartment Room 201 (72) Inventor Seiichi Takizawa 4-4-6, Kyowa, Sagamihara-shi, Kanagawa ( 56) References JP-A-57-197014 (JP, A) JP-A-49-101968 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A rectangular filter paper made of a synthetic fiber non-woven fabric is bent into two equal parts to provide two bent pieces and bent edges, and the upper and lower edges of each bent piece are An ultrasonic welding machine or a high-frequency sewing machine is used for welding and fixing to provide an end welding line to form a bag portion having an opening on the front surface, and at the position where each bent piece of the bag portion is equally divided vertically in the vertical direction. From the opening side, a plurality of long and short welding lines are alternately provided by welding and fixing with the ultrasonic sewing machine or the high-frequency sewing machine from the bent edge to a position slightly before the opening edge. Large, medium, and small voids are respectively provided in series toward the curved edges to form a bag-shaped air filter filter medium, and one end of each opening of the bag-shaped air filter filter mediums adjacent to each other. Is fixed by welding with an ultrasonic sewing machine or a high-frequency sewing machine Provided, a plurality of bags like air filter medium unit comprising a filter medium bag-shaped air filter and continuously provided fixed.