JP2000107535A - Filter element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the operation to replace filter elements with an air cleaner rapidly and easily and simplify the work to repair parts of the filter element and at the same time, improve the sealing properties of both ends of the filter element for a long time by integrally forming a resin end face with both ends of a cylindrical element body using a mold. SOLUTION: This filter element 10 is appliable to an air cleaner for a vehicle and the like and a resin open end face 21 is monolithically formed on one of the ends of a cylindrical element body 11 and a resin closed end face 22 is formed in one piece with the other end, using a mold. In addition, the element body 11 has a filter medium 12 held between netlike metal double cylinders 11a, 11b. Under the described construction, a raw material resin for both end faces 21, 22 can be brought into tight contact with the surface of the end part of the element body 11. Therefore, the positive sealing between both end faces 21, 22 and the element body 11 is ensured. Further, the liquidlike raw material resin made of a raw material polyurethane or the like is cured after the end part of the filter medium 12 is impregnated with the raw material resin. Therefore, the sealing properties can be upgraded by tightly bonding both end faces 21, 22 with the element body 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter element used for a vehicle air cleaner.

[0002]

2. Description of the Related Art Conventionally, an air cleaner for a vehicle has been disclosed in, for example, Japanese Utility Model Laid-Open No. 6-63856.
One using a cylindrical filtration element is known.
As shown in FIG. 7, this air cleaner is provided with an air cylindrical pipe main body 41 having an air suction pipe 42 and accommodating a filtration element 60 therein so as to be able to cope economically with different types of vehicles. An outlet cover 45 integrally provided with a discharge pipe 43 and attached to one end of the case main body 41, and a closing cover 50 attached to the other end of the case main body 41. The desired length of the cylindrical case body 41 is changed in accordance with the type of the vehicle, etc., and a suitable type of air cleaner is prepared by preparing an appropriate type in advance and attaching the outlet side cover 45 and the closing cover 50 thereto. Can be configured. The outlet cover 45 has a holding tube 46 and a guide tube 47 for holding the filtration element 60 on the inner surface thereof, which are formed inside and outside. Guide tube 51 surrounding
It has.

As can be seen from FIG. 8, the filter element 60 has an element body 61 having a filter medium 63 in which a filter paper or a non-woven fabric is formed into a star-shaped cylinder between a double cylinder 62 made of a mesh metal, and one end thereof. And a blind end plate 65 at the other end. In the figure, reference numerals 66 and 67 are fasteners for fixing the outlet side cover 45 and the closing cover 50 to the case main body 41.

[0004] The air cleaner 40 having the above-described structure is provided with a case body 41 against external air flowing from an air suction pipe 42.
By the centrifugal action, coarse dust in the outside air is separated into the guide cylinders 47 and 51 surrounding the filter element 60, and fine dust is collected by traversing the filter element 60 by the centrifugal action. Dust and
The filtered outside air passes through the discharge pipe 43 from the peripheral surface of the double cylinder 62 of the filter element 60 and is discharged to an intake pipe (not shown) of the engine.

In order for the air cleaner 40 to efficiently filter the outside air, it is necessary to enhance the sealing performance at both ends of the filter element 60. Therefore, conventionally, an end plate 64 made of an annular packing material is provided at one end of the element body 61.
At the other end, a blind end plate 65 in which an annular packing material and an iron plate 65a at the center thereof are arranged in series is assembled. Further, the end plate 64 is pressed from the outside by an outlet side cover 45, and the blind The end plate 65 is pressed from the outside by the closing cover 50 and pressed against both ends of the element body 61 to seal both ends of the filtration element 60.

[0006] However, in the above-mentioned air cleaner, there is a problem that the work of removing the end plate and the blind end plate and the work of assembling the filter element when replacing the filtration element and the like are required, and the work is complicated. In addition, in a repair shop or the like, the end plate and the blind end plate must be stocked as repair parts in addition to the element main body, and parts management is troublesome. Further, since the end plate and the blind end plate are pressed against the end surface of the element body by the outlet side cover and the closing cover to seal both ends of the filtration element, the rubber constituting the packing material of the end plate and the blind end plate is provided. Etc. deteriorate with the passage of time, and there is also a problem that a gap is generated between the element body and the end plate and the blind end plate, so that poor sealing tends to occur. Further, when the end plate and the blind end plate become thin due to deterioration or the like, the filtration element becomes loose between the outlet side cover and the closing cover. Further, if the strength of the packing portions of the end plate and the blind end plate is not sufficient, the end plate may be damaged when the filter element is pressed and fixed by the outlet cover and the closing cover.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and the work of replacing a filter element with an air cleaner is quick and easy, and parts management of the filter element in a repair shop or the like is simplified. Further, the present invention provides a filtration element having excellent sealing properties at both ends of the filtration element over a long period of time.

[0008]

That is, the invention of claim 1 relates to a filter element characterized in that resin-made end faces are integrally provided at both ends of a cylindrical element body by molding.

[0009] The invention of claim 2 relates to the filtration element according to claim 1, wherein the resin constituting the end face is made of polyurethane.

[0010] The invention of claim 3 relates to the filtration element according to claim 1 or 2, wherein the resin constituting the end face is made of a foam.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the resin constituting the end face is JIS.
The present invention relates to a filtration element, characterized in that the condition of compression set of 70 ° C. for 22 hours specified by K6301 is 10% or less.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the resin constituting the end face is JIS.
A value of surface hardness measured by A hardness tester is 15 ± 8, JIS
The tensile strength specified by K6301 is 5.0 kg / cm
^The present invention relates to a filtration element characterized by having ² or more.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing a filtration element according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view at the center of FIG. 1, FIG. 3 is a sectional view showing an open end face during molding, and FIG. FIG. 5 is a side view showing still another example of the resin end face, and FIG. 6 is a perspective view showing an example of the outer face of the resin end face.

The filter element 10 of the present invention shown in FIGS. 1 and 2 is used for an air cleaner for a vehicle as described in the section of the prior art, and has an opening made of resin at one end of a cylindrical element body 11. End face 21, closed end face 2 made of resin on the other end
2 are provided integrally by molding.

The element body 11 is made of a reticulated metal double cylinder 11 like the element body 61 shown in the prior art.
The filter medium 12 is sandwiched between a and 11b. Filter media 1
As 2, a filter paper or a non-woven fabric formed into a star-shaped cylindrical shape is used.

The center opening 21a formed in the opening end face 21 is used for assembling the filter element 10 into the case body 41 shown in FIG.
7 is connected to the discharge pipe 43 of FIG. 7 so that the filtered outside air can be discharged to the discharge pipe 43, and the holding tube 46 of the outlet side cover 45 in FIG. For positioning and holding. The other closed end face 22 is for closing the suction-side end of the filtration element 10.

The both end faces 21 and 22 are made of resin and are formed by directly molding the end of the element body 11. That is, as shown in FIG. 3, the opening end face 21 is formed with a concave cavity 31 having a diameter equal to the outer diameter of the end face 21, and the center of the inner surface of the cavity 31 is equal to the inner diameter of the element body 11. The process is performed as follows using the mold 30 in which the columnar portion 32 having the outer diameter is formed to protrude. First, the cavity 31 of the mold 30 is filled with a resin material M such as a polyurethane material in a required amount. Next, the end of the element body 11 is inserted into the cavity 31, and the resin material M is injected into the cavity 31.
After the opening end face 21 integrated with the end of the element main body 11 is formed by curing into a shape, the element main body 1
The opening end face 21 integrated with the mold 1 is removed from the mold 30.

On the other hand, the molding of the closed end face 22 may be performed in the same manner as the molding of the open end face 22 using a mold (not shown) having no columnar portion 32.

As described above, the end faces 21 and 22 molded integrally with the element body 11 have the following excellent effects as compared with the case where the end faces are post-fixed with an adhesive. That is, the resin material M for the end faces 21 and 22 is
Since the end faces 21 and 22 are formed in contact with the end surface of the element 1 without any gap, the seal between the end faces 21 and 22 and the element body 11 is ensured. Further, a liquid resin material M such as a polyurethane material is supplied to the filter medium 12 of the element body 11.
To be impregnated and hardened, the end faces 21,
The element 22 and the element body 11 are firmly fixed to each other, whereby the sealing property is also improved. In addition, since the end faces 21 and 22 and the element body 11 are firmly fixed, the end faces 21 and 22 do not easily come off when the filter element 10 is handled, and it is not necessary to pay attention to the handling operation. Further, simultaneously with the molding of the end faces 21 and 22,
Since the elements 1 and 22 can be integrated into the element body 11, the assembling work of the filtration element is also simplified.

The resin forming the opening end face 21 and the closing end face 22 is preferably polyurethane. Since the raw material of the polyurethane is liquid, the molding is easy, and the polyurethane exhibits a large adhesive property upon curing. Therefore, strong integration between the end faces 21 and 22 and the element body 11 and a reliable sealing property are achieved. Excellent in that it can be obtained. Further, the resin forming the end faces 21 and 22 is preferably a foam. If the end faces 21 and 22 are made of foam, the end faces 21 and 22 are pressed by the outlet side cover 45 and the closing cover 50 when the filter element 10 is assembled to the case body 41 of the air cleaner 40, so that the end face 21 is formed. , 2
2 is compressed, thereby generating an elastic restoring force on the end faces 21 and 22. Therefore, the filter element 10 can be housed and held in the case body 41 without rattling.

Further, the case main body 41 is provided for a long period of time.
In order to surely prevent backlash of the filtration element 10 in the inside, the resin of the end faces 21 and 22 is changed to JIS K63.
It is preferable that the condition at 70 ° C. for 22 hours of compression set, which is specified by 01, is 10% or less. With the resin in this range, even if the end faces 21 and 22 are pressed by the outlet side cover 45 and the closing cover 50 for a long time in an engine room where the temperature is high, the end faces 21 and 22
The restoring force is not impaired, and the outlet element cover 45 and the closing cover 50 come into close contact with each other, so that the filtration element 10 can be held without rattling.

When the filter element 10 is housed in the case body 41 or the like, the end faces 21 and 22 may be rubbed against or hit by the case body 41 or the like.
In order to prevent damage to the seals 1 and 22, and not to impair the sealing property, the resin has a surface hardness measured by a JIS A hardness tester of 15 ± 8, particularly 15 ± 5, and , Tensile strength specified by JIS K 6301 is 5.0 kg / cm ² or more, especially 6.3 kg / cm ²
The above is preferable.

Resin end face 2 satisfying the above physical property values
To mold 1, 22 with a polyurethane foam, a polymer polyol having four or more functional groups is used, an amine catalyst is used more as a catalyst than usual, and only water is used as a blowing agent. Further, it is preferable that the end faces 21 and 22 made of the polyurethane foam have a free foam density of 500 kg / m ³ or less, particularly 400 kg / m ³ or less to reduce the distortion and improve the sealing property. Table 1 shows a blending example in which the resin end faces 21 and 22 satisfying the above physical properties are formed of a polyurethane foam.

[0024]

[Table 1]

The details of each component in the table are as follows. Polyol A: average number of functional groups = 3, average number of molecules = 400
0 Polyol B: average number of functional groups = 4, average number of molecules = 130
00 Dihydric alcohol A: 1,4 butanediol Dihydric alcohol B: Ethylene glycol Catalyst A: Nikka Octic lead 20% Nippon Kagaku Sangyo Catalyst B: Triethylenediamine 33% DPG solution Trade name: Kaorizer No. 31, Kao foam stabilizer: silicone foam stabilizer Trade name: L-3601, Nippon Unicar Isocyanate: urethane-modified MDI Trade name: C-1050, made by Nippon Polyurethane The end face after molding was visually inspected for the presence of air pockets on its outer surface, and the case where no air pockets were found was indicated by a circle.

Further, the resin end faces 21 and 2 of the embodiment shown in Table 1 are used.
The filter element 10 having the filter element 2 was mounted on an air cleaner case and used.
It was confirmed that 0 was in close contact with the case main body 11 without rattling, and was excellent in durability that could withstand long-term use.

The filter element 10 in the above embodiment has an open end face 21 with one side open at the center and a closed end face 22 with the other side closed. However, the present invention is not limited to this. It may be. This eliminates the need to consider the direction of the filtration element 10 when assembling the filtration element 10 to the case body of the air cleaner, and improves workability.

The end face 22 of another example shown in FIGS.
Like A and 22B, groove-shaped locking portions 25A and 25B corresponding to the shape of the air cleaner case main body to which the filtration element 10 is assembled may be provided on the outer periphery of each end surface.
Further, a locking groove 25C may be provided on the outer surface of the end face 22C as shown in FIG.

[0029]

As shown and described above, according to the filter element of the present invention, since the resin end face is integrally formed at both ends of the element body, the sealing property at both ends of the filter element is high and excellent. A filtering action can be obtained. In addition, since there is no need to assemble the end plate, the number of components to be separated or assembled when exchanging the filtration element or the like is reduced, so that the operation is simplified and the cost can be reduced.

In addition, the end face made of the resin is formed as described in claims 2 to 5.
If the material satisfies the above condition, it is possible to obtain a filtration element that is lightweight, has more excellent sealing properties and heat resistance, and can withstand long-term use.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a filtration element according to an embodiment of the present invention.

FIG. 2 is a central longitudinal sectional view of FIG.

FIG. 3 is a cross-sectional view showing a state in which an opening end face is molded;

FIG. 4 is a side view showing another example of the resin end surface.

FIG. 5 is a side view showing still another example of the resin end surface.

FIG. 6 is a perspective view showing an example of an outer surface of a resin end surface.

FIG. 7 is a sectional view schematically showing the structure of an air cleaner.

FIG. 8 is a perspective view showing an example of a conventional filtration element.

[Explanation of symbols]

 Reference Signs List 10 Filtration element 11 Element body 21 Resin end face (opening) 22 Resin end face (closed)

Claims (5)

[Claims] 1. A filtration element wherein resin-made end faces are integrally provided at both ends of a cylindrical element body by molding. 2. The filter element according to claim 1, wherein the resin constituting the end face is made of polyurethane. 3. The filter element according to claim 1, wherein the resin forming the end face is made of a foam. 4. The resin according to claim 1, wherein the resin constituting the end face has a compression set of 70 ° C. for 22 hours of 10% or less as defined by JIS K6301. Filtration element. 5. The resin according to claim 1, wherein the resin constituting the end face has a surface hardness measured by a JIS A hardness meter of 15 ± 8 and a tensile strength specified by JIS K6301. A filtration element having a pressure of 5.0 kg / cm ² or more.