JP2005324147A - Filter, production method of the same, and fluid filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly strong filter excellent in processibility and also excellent in heat resistance and durability. <P>SOLUTION: The filter 10 comprises seal parts 14 and 15 made of photocurable resin in both end parts 12a and 12b of a cylindrical chrysanthemum type element 11 in the axial direction and a ring-like reinforcing member (a reinforcing sheet 18) having a large number of voids is installed in the inside of each seal part. The reinforcing member is preferably a reinforcing sheet having a mesh structure. Also, the reinforcing member is preferable to be made of a synthetic resin and having a ratio (T1/T2) of the light transmittance (T1) of the reinforcing member to the light transmittance (T2) of the photocurable resin in a range of 0.7 to 1.3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a filter body, a manufacturing method thereof, and a fluid filter, and more particularly to a high-strength filter body excellent in workability, heat resistance and durability, a manufacturing method thereof, and a fluid filter.

2. Description of the Related Art Conventionally, as a filter body used in a fluid filter, a filter body in which seal members are attached to both end portions in the axial direction of a chrysanthemum type element with a hot melt adhesive is known (for example, Patent Document 1). reference).
However, in Patent Document 1, it is necessary to form a bead on the folding process of the chrysanthemum type element, but from the viewpoint of productivity, the bead is formed when both ends in the axial direction of the chrysanthemum type element are clamped with a jig. It may not be done. Further, when a hot melt adhesive such as polyamide having reactivity is used, there is a problem of deformation due to standing at high temperature. Moreover, it is necessary to hold the hot melt adhesive at a high temperature during activation and reactivation, and complicated and expensive production equipment is required. Furthermore, the hot melt adhesive has a problem that it takes a relatively long time to cure.

Therefore, as a conventional filter body that solves the above-mentioned problem, a filter body in which seal portions made of a photocurable resin are provided at both end portions in the axial direction of a cylindrical chrysanthemum element is known (for example, Patent Documents). See 2). With such a configuration, there is no need to provide a heating process or separately assemble a sealing member, and there are advantages such as a reduction in the manufacturing process and the number of parts.
However, in the above-mentioned Patent Document 2, when a thermoplastic polymer material such as an acrylic resin is used as the photocurable resin, due to the temperature dependence of the strength of the material, for example, a lubricating oil of an automobile engine or the like. When applied to an application that can be in an extremely high temperature environment, the temperature environment that can be used is limited due to the problem of the strength of the seal portion.

JP-A-10-57716 JP2003-181212

As described above, the present invention has been made in view of the above-described present situation, and an object of the present invention is to provide a high-strength filter body having excellent processability and excellent heat resistance and durability.
Another object of the present invention is to provide a suitable method for producing the filter body and a suitable fluid filter using the filter body.

The present invention is as follows.
1. In a filter body in which seal portions made of a photocurable resin are provided at both ends in the axial direction of the cylindrical chrysanthemum type element,
A filter body, wherein a ring-shaped reinforcing member having a large number of voids is provided inside the seal portion.
2. The above 1. wherein the reinforcing member is a reinforcing sheet having a mesh structure. The filter body as described.
3. The reinforcing member is made of synthetic resin, and the ratio (T1 / T2) between the light transmittance (T1) of the reinforcing member and the light transmittance (T2) of the photocurable resin is 0.7 to 1.3. The above 1. Or 2. The filter body of description.
4). The ratio (t / h) between the thickness (t) of the reinforcing member and the height (h) from the axial end surface of the chrysanthemum element to the seal surface of the seal portion is 0.1 to 0.8. 1 above. To 3. The filter body as described in any one of these.
5). The number of the voids is 30 to 250 per square inch. To 4. The filter body as described in any one of these.
6). One of the surfaces of the reinforcing member is in contact with the end face in the axial direction of the chrysanthemum element. To 5. The filter body as described in any one of these.
7). The outer peripheral edge of the reinforcing member is located on the inner side of the outer peripheral edge of the seal portion, and the distance (a) between the outer peripheral edge of the reinforcing member and the outer peripheral edge of the seal member is 3 mm or less. To 6. The filter body as described in any one of these.
8). Above 1. To 7. A method for producing a filter body according to any one of
Disposing a ring-shaped reinforcing member having a large number of voids on the axial end face of the cylindrical chrysanthemum-shaped element;
Disposing a photocurable resin on the surface of the disposed reinforcing member;
In a state where a transparent mold is applied to the arranged photocurable resin, the photocurable resin is photocured to form a seal portion at an end portion in the axial direction of the chrysanthemum type element;
The manufacturing method of the filter body characterized by comprising.
9. Above 1. To 7. A method for producing a filter body according to any one of
Disposing a ring-shaped reinforcing member having a large number of voids and a photocurable resin inside a transparent mold; and
A step of photocuring the photocurable resin to form a seal portion at an end portion in the axial direction of the chrysanthemum type element in a state where the molding die is applied to an end face in the axial direction of the cylindrical chrysanthemum type element; ,
The manufacturing method of the filter body characterized by comprising.
10. The step of disposing is a step of disposing the reinforcing member in the mold, and then disposing the photocurable resin,
In the forming step, the vertical direction of the chrysanthemum type element is reversed while the molding die is applied to the lower end surface in the axial direction of the chrysanthemum type element whose axial center is directed in the vertical direction. 8. The step 9 described above, which is a step of photocuring the photocurable resin. The manufacturing method of the filter body of description.
11. 8. The viscosity of the photocurable resin is 10,000 to 100,000 mPa · s. To 10. The manufacturing method of the filter body as described in any one of these.
12 Above 1. To 7. A filter body according to any one of the above, a storage body that stores the filter body, and an upper support portion and a lower support portion that are provided in the storage body and support the filter body from above and below,
The fluid filter, wherein the seal portion seals between both axial end surfaces of the chrysanthemum element and the upper support portion and the lower support portion.

According to the filter body of the present invention, since a high-strength reinforcing member is integrally provided inside the seal portion (photo-curable resin), when the fluid filter is used, the axial direction of the chrysanthemum element in the seal portion. Excellent durability and heat resistance against a strong tensile force generated on the outer peripheral side of the end face can be exhibited, and deterioration of the seal portion is suppressed.
Further, when the reinforcing member is a reinforcing sheet having a mesh structure, the photocurable resin can be easily transmitted through the reinforcing member, and the workability of the seal portion can be improved. Moreover, it is excellent in light transmittance.
Further, when the reinforcing member is made of a synthetic resin and the ratio of the light transmittance of the reinforcing member to the light transmittance of the photocurable resin is 0.7 to 1.3, the light transmission of the reinforcing member Since the rate and the light transmittance of the photocurable resin are substantially the same value, the workability of the seal portion can be further improved.
Further, when the ratio between the thickness of the reinforcing member and the height from the axial end surface of the chrysanthemum element to the seal surface of the seal portion is 0.1 to 0.8, the seal portion itself has an appropriate A sufficient reinforcing effect by the reinforcing member can be exhibited while ensuring strength and elasticity.
Moreover, when the said many space | gap parts are 30-250 per inch square, it is easy to permeate | transmit a photocurable resin with respect to a reinforcement member, and can improve the workability of a seal part further. Moreover, it is excellent in light transmittance.
In addition, when one surface of the reinforcing member is in contact with the end face in the axial direction of the chrysanthemum element, a stronger reinforcing effect by the reinforcing member can be exhibited.
Further, when the outer peripheral edge of the reinforcing member is located inside the outer peripheral edge of the seal portion, and the distance between the outer peripheral edge of the reinforcing member and the outer peripheral edge of the seal member is 3 mm or less, the reinforcing member The stronger reinforcement by can be demonstrated.
According to the method for producing a filter body of the present invention, first, a reinforcing member is disposed on the end face of the chrysanthemum element in the axial direction, and then a photocurable resin is disposed on the surface of the disposed reinforcing member. Then, in a state where a transparent mold is applied to the disposed photocurable resin, the photocurable resin is photocured to form a seal portion at the end portion in the axial direction of the chrysanthemum type element. Therefore, it is not necessary to separately provide a heating process or a seal member, and the manufacturing process and the number of parts can be reduced.
According to another method for producing a filter body of the present invention, first, a reinforcing member and a photocurable resin are disposed inside a transparent mold, and then the mold is used as an end face in the axial direction of a chrysanthemum element. In the applied state, the photocurable resin is photocured to form a seal portion at the axial end of the chrysanthemum element. Therefore, it is not necessary to separately provide a heating process or a seal member, and the manufacturing process and the number of parts can be reduced.
Further, the arranging step is a step of arranging the reinforcing member inside the mold, and thereafter arranging the photocurable resin, and the forming step includes the chrysanthemum type element. In the process of reversing the vertical direction and then photocuring the photocurable resin, the curing conditions (eg viscosity, temperature, light irradiation time, strength, etc.) of the photocurable resin are more easily managed. can do.
Moreover, when the viscosity of the said photocurable resin is 10,000-100000 mPa * s, the curing conditions of a photocurable resin can be managed still more easily. Further, at the end of the chrysanthemum type element, the photocurable resin can be penetrated to an appropriate depth without being too shallow and not too deep. Further, when the chrysanthemum element is inverted, the reinforcing member can be suitably lowered in the photocurable resin.
According to the fluid filter of the present invention, the seal portion seals between both end surfaces in the axial direction of the chrysanthemum type element and the upper support portion and the lower support portion. Since a high-strength reinforcing member is integrally provided in the seal portion (photo-curable resin), the seal portion is generated on the outer peripheral side of the end face in the axial direction of the chrysanthemum type element when the fluid filter is used. Excellent durability and heat resistance against a strong tensile force can be exhibited, and deterioration of the seal portion is suppressed.

1. Filter body The filter body according to the present invention includes a chrysanthemum-shaped element, a seal portion, and a reinforcing member described below. This filter body can further be provided with a protector member, for example. This protector member is usually cylindrical, and a large number of through holes are formed on its peripheral surface.

  The “chrysanthemum element” is not particularly limited as long as it has a cylindrical shape. This chrysanthemum-shaped element usually has a large number of pleats, and both ends and / or the vicinity of both ends of folds adjacent to each other are bonded with an adhesive. Examples of the material of the adhesive include thermoplastic resins, thermosetting resins, and photocurable resins. When this adhesive is a photo-curing resin, adjacent pleats can be bonded simultaneously with the formation of a seal portion described later. Examples of the chrysanthemum element include a nonwoven fabric, a woven fabric, and filter paper.

  The “seal part” is not particularly limited in shape, size, arrangement, etc. as long as it is provided at both ends in the axial direction of the chrysanthemum element and the photocurable resin is cured. This seal portion usually has a ring shape. Further, the seal portion preferably has a hardness of 10 to 100, more preferably 35 to 90, particularly 60 to 80 in JIS K 7215 (Dumer hardness).

The seal portion may have, for example, a main seal portion positioned axially outside the end face of the chrysanthemum element and an adhesive portion positioned axially inside the end face of the chrysanthemum element (see FIG. 4). Thereby, while a seal part has the predetermined elasticity for ensuring sealing performance, the adhesiveness of a seal part and a chrysanthemum type element can be improved. This adhesion site can penetrate, for example, a chrysanthemum type element (for example, a non-woven fabric). Thereby, adhesiveness can be improved further. Moreover, the said seal part can be extended in the centripetal direction from the internal peripheral surface of the said chrysanthemum type | mold element, for example. Thereby, the both ends of the axial direction of a chrysanthemum type | mold element and the said protector member can be sealed suitably.
In addition, the said seal part has a site | part normally filled in many space | gap parts of the reinforcement member mentioned later.

  Moreover, the said seal | sticker part can be extended in the centrifugal direction toward the outer periphery of the said chrysanthemum type | mold element, for example. This eliminates the step of previously bonding the folds of the chrysanthemum type element with an adhesive. In this case, as a form of formation of the seal portion, for example, a form (see FIGS. 14 and 15) extending over the entire area of the both end faces in the axial direction of the chrysanthemum type element (including the end face between adjacent pleats), chrysanthemum type The form (refer FIG. 16 and 17) extended along the fold of the both end surfaces of the axial direction of an element can be mentioned.

  The photocurable resin is usually a composition in which a photopolymerization initiator is blended with a curable polymer (uncured polymer, oligomer, etc.), such as visible light, ultraviolet light, electron beam, and neutron beam. Is photopolymerized. Examples of the photocurable resin include acrylic resins, silicone resins (silicone polyester type, acrylic silicone having an acryloyl group, mercapto-vinyl addition polymerization type, etc.), unsaturated polyester resins, alkyd resins, epoxy resins, Phenol resins, polyimide resins, bismaleimide / triazine resins, guanamine resins, dicyclopentadiene resins, and the like can be used. This resin may be a solventless type or a solvent type.

  The “reinforcing member” is not particularly limited in its structure, material, shape and the like as long as it is a ring shape provided inside the seal portion and having a large number of voids. Examples of the structure of the reinforcing member include a mesh structure, a porous structure, and a foamed structure. From the viewpoint of the transparency and light permeability of the photocurable resin, the reinforcing member is preferably a reinforcing sheet having a mesh structure.

  Examples of the material of the reinforcing member include synthetic resin, rubber, metal, ceramic, and glass. Of these, synthetic resins are preferred. Examples of the synthetic resin include polyester resins (polyethylene terephthalate, polybutylene terephthalate, etc.), polycarbonate resins, polyolefin resins (polyethylene, polypropylene, etc.), styrene resins, acrylic resins, and the like. Moreover, as this synthetic resin, what has translucency in any wavelength between wavelengths of 100-600 nm is preferable. In this case, the ratio (T1 / T2) between the light transmittance T1 of the reinforcing member and the light transmittance T2 of the photocurable resin is 0.7 to 1.3, more preferably 0.8 to 1.2, It is preferable that it is 0.9-1.1. This is because the light transmittance of the reinforcing member and the photocurable resin becomes equal, and the photocurable resin located on the front surface side and the back surface side of the reinforcing member can be uniformly cured. Further, the heat softening point of the synthetic resin is preferably 140 ° C., more preferably 160 ° C., and particularly preferably 180 ° C. or higher in JIS K 7207 (deflection temperature under load).

Here, as shown in FIG. 4, the ratio (t / h) between the thickness t of the reinforcing member and the height h from the axial end surface of the chrysanthemum element to the seal surface of the seal portion is 0. 0.1 to 0.8, more preferably 0.15 to 0.6, and particularly preferably 0.2 to 0.5. This is because a sufficient reinforcing effect by the reinforcing member can be exhibited while securing an appropriate strength and elasticity of the seal portion itself.
The thickness t of the reinforcing member can be appropriately selected according to the size of the chrysanthemum type element, the seal portion, etc. When the chrysanthemum type element is for a vehicle, the thickness t of the reinforcing member is 0.05. -1.0 mm, more preferably 0.07 to 0.7 mm, and particularly preferably 0.1 to 0.5 mm. Further, the height h of the seal portion can be appropriately selected according to the size of the chrysanthemum type element or the like, but when the chrysanthemum type element is for vehicles, the height h of the seal portion is 0.5 to It is preferably 2.0 mm, more preferably 0.6 to 1.8 mm, and particularly preferably 0.7 to 1.6 mm.

  The number, shape, size, etc. of the voids are not particularly limited, but the number of voids is preferably 30 to 250, more preferably 50 to 200, and particularly preferably 70 to 150 per inch square. This is because the light curable resin is excellent in transparency and light transparency, and there is no occurrence of flash (entanglement) at the outer peripheral edge of the reinforcing member, and further excellent flatness and workability are exhibited. Moreover, it is preferable that the numerous voids are formed in substantially the same shape and size. Further, the numerous voids are usually filled with the portions constituting the seal portion.

  For example, the reinforcing member can be arranged such that one surface thereof does not contact the end face in the axial direction of the chrysanthemum element. However, when the fluid filter is used, a strong tensile force is applied on the outer peripheral side of the axial end face of the chrysanthemum element at the seal portion. Therefore, it is preferable that the reinforcing member is arranged so that one surface thereof is in contact with the end face in the axial direction of the chrysanthemum type element from the viewpoint that a stronger reinforcing effect can be exhibited. In addition, the other surface of the said reinforcement member is not normally exposed from the sealing surface of the said seal part. This is because the sealing performance of the seal portion is impaired. Further, the “contact” does not necessarily need to be in contact with the entire surface, and means a state in which contact is made at 80% (preferably 90%) or more of the surface area of the reinforcing member.

  For example, the outer peripheral edge of the reinforcing member may be located outside the outer peripheral edge of the seal portion. From the viewpoint of aesthetics of the product, it is preferable that the outer peripheral edge of the reinforcing member is located inside the outer peripheral edge of the seal portion. In this case, the distance a (see FIG. 4) between the outer peripheral edge of the reinforcing member and the outer peripheral edge of the seal member can be set to a value exceeding 3 mm, for example. However, as described above, when the fluid filter is used, a strong tensile force is applied on the outer peripheral side of the end face in the axial direction of the chrysanthemum element at the seal portion. Therefore, it is preferable that the distance a is 3 mm, more 2 mm, particularly 1 mm or less from the viewpoint that a stronger reinforcing effect can be exhibited.

2. Manufacturing method of filter body [1]
The method for manufacturing a filter body according to the present invention is the above-described method for manufacturing a filter body, the step (a) of disposing the reinforcing member on the end face in the axial direction of the chrysanthemum element, and the disposition thereof. The step (b) of disposing (for example, coating) the photocurable resin on the surface of the reinforcing member, and the photocuring in a state where a transparent mold is applied to the disposed photocurable resin. And (c) forming a seal portion on the end portion in the axial direction of the chrysanthemum type element by photocuring the functional resin.

In the step (a), for example, the chrysanthemum type element is arranged so that its axial direction is directed in the vertical direction, and a reinforcing member is disposed on the upper end surface of the chrysanthemum type element in the axial direction. it can.
In the step (b), the viscosity of the photocurable resin is preferably 10,000 to 100,000 mPa · s, more preferably 25,000 to 80,000 mPa · s, and particularly preferably 40,000 to 60,000 mPa · s. This is because the curing conditions of the photocurable resin can be more easily managed and the processability is excellent. Moreover, this photocurable resin can be infiltrated into the chrysanthemum type element to an appropriate depth without being too shallow and not too deep, and the adhesion between them can be improved.
In the step (c), the irradiation time of visible light, ultraviolet light or the like is usually about 25 to 35 seconds.

  The “molding die” usually has a molding part (groove) corresponding to the shape of the seal part to be molded. Further, the above “transparent” means that light can be transmitted, and is not necessarily colorless and transparent. These also apply to the following inventions.

3. Manufacturing method of filter body [2]
Another method for manufacturing a filter body according to the present invention is the above-described filter body manufacturing method, wherein the reinforcing member and the photocurable resin are disposed in a transparent mold (a); A step of forming the seal portion at the end portion in the axial direction of the chrysanthemum type element by photocuring the photocurable resin in a state where the mold is applied to the end face in the axial direction of the chrysanthemum type element (b) ).

In the step (a), the order and timing of arranging the reinforcing member and the photocurable resin are not particularly limited. In the step (a), the reinforcing member is arranged inside the molding die, and then It is preferable to arrange (for example, fill) a photocurable resin. In this case, in the above step (b), the vertical direction of the chrysanthemum type element is inverted while the mold is applied to the lower end surface in the axial direction of the chrysanthemum type element whose axis is directed in the vertical direction. Preferably, the photocurable resin is photocured. This is because the curing conditions of the photocurable resin can be more easily managed and the processability is excellent.
When the chrysanthemum type element is inverted, the mold is also inverted, and the reinforcing member sinks in the liquid photocurable resin. Therefore, the height position of the reinforcing member with respect to the seal portion can be adjusted by appropriately managing the viscosity of the photocurable resin, the light irradiation time, and the like.

In the step (a), the viscosity of the photocurable resin is preferably 10,000 to 100,000 mPa · s, more preferably 25,000 to 80,000 mPa · s, and particularly preferably 40,000 to 60,000 mPa · s. This is because the curing conditions of the photocurable resin can be more easily managed and the processability is excellent. Moreover, this photocurable resin can be infiltrated into the chrysanthemum type element to an appropriate depth without being too shallow and not too deep, and the adhesion between them can be improved. Further, when the chrysanthemum element is inverted, the reinforcing member can be suitably lowered in the photocurable resin.
In the step (b), the irradiation time of visible light, ultraviolet light or the like is usually about 25 to 35 seconds.

4). Fluid filter A fluid filter according to the present invention includes the above-described filter body, a storage body that stores the filter body, an upper support portion and a lower support portion that are provided in the storage body and support the filter body from above and below, The seal portion seals between both end surfaces in the axial direction of the chrysanthemum element and the upper support portion and the lower support portion.

Hereinafter, the present invention will be described in detail with reference to the drawings.
An embodiment embodying the present invention will be described with reference to the drawings, taking a so-called “spin-on” oil filter as an example.
In this embodiment, a spin-on type oil filter is exemplified as the “fluid filter” according to the present invention. This oil filter is installed in the middle of an engine lubrication system circuit of a vehicle such as an automobile through a fixing means as appropriate, and can filter foreign matters such as dust, metal wear pieces and sludge mixed in the engine oil. It is.

[Example 1]
(1) Configuration of Oil Filter As shown in FIG. 1, the oil filter 1 according to the first embodiment is housed in a casing 2 (illustrated as a “housing body” according to the present invention) and the casing 2. Filter body 10, relief valve 4 (illustrated as an “upper support portion” according to the present invention) that holds the filter body 10 in the vertical direction, and check valve 5 (illustrated as a “lower support portion” according to the present invention) And).

  The casing 2 includes a cylindrical case member 2a for housing the filter body 10, and a bottom plate 2b for closing an opening formed at the lower portion of the case member 2a. In the bottom plate 2b, one oil outlet 6 is formed at the center, and a plurality of oil inlets 7 are formed around the oil outlet 6 at predetermined intervals along the circumferential direction. Yes. The space in the casing 2 is connected to the oil inlet 7 and the upstream side of the filter 10 and the oil outlet 6 by the seal portion described later constituting the filter 10. Is divided into an oil passage 8b on the downstream side.

(2) Configuration of Filter Body As shown in FIGS. 2 and 3, the filter body 10 according to the first embodiment includes a cylindrical chrysanthemum type element 11, and an upper end portion 12 a and a lower end portion 12 b of the chrysanthemum type element 11. And ring-shaped seal portions 14 and 15 provided on the surface.

The chrysanthemum-shaped element 11 is formed into a chrysanthemum shape by bending a filter medium made of nonwoven fabric, and has a large number of pleats 16. Further, the vicinity of the upper end portion 13a and the vicinity of the lower end portion 13b of the inner surface of the pleats 16 adjacent to each other are bonded by an adhesive layer 17 (a thermoplastic resin layer or the like).
In the first embodiment, the adhesive layer 17 is not formed on the upper side of the vicinity 13a of the chrysanthemum element 11 (ie, the upper end portion 12a) and on the lower side of the lower end portion 13b (ie, the lower end portion 12b). .

The seal portions 14 and 15 are made of a photocurable resin (such as an acrylic resin). These seal portions 14 and 15 have a predetermined elastic force, and the hardness thereof is approximately 70 according to JIS K 7215. In a state where the filter body 10 is housed in the casing 2, the seal portion 14 seals between the upper surface portion of the filter body 10 and the relief valve 4, and the seal portion 15 allows the filter body 10 to be sealed. A space between the lower surface portion and the check valve 5 is sealed (see FIG. 1).
Note that the liquid photocurable resin is translucent at a wavelength of 400 nm. In addition, since the seal portions 14 and 15 have the same vertically symmetrical structure, only the seal portion 14 will be described in detail below, and detailed description of the seal portion 15 will be omitted.

  As shown in FIG. 4, the seal portion 14 includes a main seal portion 14 a located on the axially outer side from the upper end surface of the chrysanthemum type element 11, and an adhesive site 14 b located on the inner side in the axial direction from the upper end surface of the chrysanthemum type element 11. And have. The seal portion 14 is formed to extend in the centripetal direction from the inner peripheral surface of the chrysanthemum type element 11. Further, the height from the upper end surface of the chrysanthemum type element 11 to the seal surface of the seal portion 14, that is, the axial height h of the main seal portion 14a is set to about 0.5 mm.

  In addition, a ring-shaped reinforcing sheet 18 (illustrated as a “reinforcing member” according to the present invention) having a large number of voids is provided inside the seal portion 14. The reinforcing sheet 18 is made of a polyester resin and has translucency at a wavelength of 400 nm. The ratio (T1 / T2) between the light transmittance T1 of the reinforcing sheet 18 and the light transmittance T2 of the photocurable resin is about 1.0. The heat softening point of the reinforcing sheet 18 is 240 ° C. in JIS K 7207 (load deflection temperature).

Further, the reinforcing sheet 18 has a mesh structure as shown in FIG. In this mesh structure, the number of voids is set to 100 per inch square. In addition, the large number of gaps are formed in substantially the same shape and size. Further, a large number of gaps are filled with a part of the seal part 14.
Here, as shown in FIG. 4, the thickness t of the reinforcing sheet 18 is set to 0.2 mm. Accordingly, the ratio (t / h) between the thickness t (0.2 mm) of the reinforcing sheet 18 and the height h (0.5 mm) of the main seal portion 14a is 0.4.

  Further, one surface of the reinforcing sheet 18 is disposed so as to contact the end face in the axial direction of the chrysanthemum element 11. Further, the other surface of the reinforcing sheet 18 is not exposed from the seal surface of the seal portion 14. Further, the outer peripheral edge of the reinforcing sheet 18 is located inside the outer peripheral edge of the seal portion 14 (main seal portion 14a). And the space | interval a of the outer periphery of this reinforcement sheet 18 and the outer periphery of the seal | sticker part 14 is set to about 0.3 mm.

(3) Manufacturing method of filter body Next, the manufacturing method of the filter body 10 which concerns on the present Example 1 is demonstrated.
First, as described above, a chrysanthemum-shaped element 11 (see FIGS. 6 and 7) having a large number of pleats 16 and having an adhesive layer 17 bonded to the vicinity of the upper end 13a and the vicinity of the lower end 13b of adjacent pleats 16 is prepared. To do. Next, the reinforcing sheet 18 is placed on the inner peripheral side of the upper end surface of the chrysanthemum type element 11 with the axial direction facing the vertical direction, and then the reinforcing sheet 18 placed thereon is covered. The said photocurable resin is apply | coated (refer FIG. 8 and 9). The applied photocurable resin has a viscosity of 48000 ± 5000 mPa · s at a temperature of about 25 ° C.

  Thereafter, a transparent mold 100 (see FIG. 9) is pressed from above the chrysanthemum element 11 toward the applied photocurable resin. Then, the photocurable resin is press-fitted into the upper end portion 12a of the chrysanthemum element 11, and from this state, irradiation with visible light, ultraviolet light, or the like is performed for a predetermined time (about 30 seconds) (see FIG. 10). . As a result, a seal portion 14 is formed on the upper end portion 12 a of the chrysanthemum type element 11. In this seal portion 14, the main seal part 14 a is exposed from the upper end surface of the chrysanthemum type element 11, while the adhesion part 14 b penetrates between adjacent pleats 16 of the chrysanthemum type element 11, and further the chrysanthemum type element 11 (nonwoven fabric) ) It penetrates the resin inside.

  In the filter body 10 obtained as described above, a cylindrical metal protector member 9 (see FIG. 1) having a large number of through holes is mounted on the inner peripheral surface of the chrysanthemum element 11. Then, the filter body 10 is accommodated in the case member 2a, and the bottom plate 2b is attached to the case member 2a, whereby the above-described oil filter 1 is obtained.

(4) Other manufacturing method of filter body Next, the other manufacturing method of the filter body 10 which concerns on the present Example 1 is demonstrated.
First, as described above, a chrysanthemum-shaped element 11 (see FIGS. 6 and 7) having a large number of pleats 16 and having an adhesive layer 17 bonded to the vicinity of the upper end 13a and the vicinity of the lower end 13b of adjacent pleats 16 is prepared. To do. Next, the reinforcing sheet 18 is first placed in the transparent mold 100, and then the photocurable resin is filled so as to cover the placed reinforcing sheet 18 (see FIG. 11). . The viscosity of the filled photocurable resin is 48000 ± 5000 mPa · s at a temperature of about 25 ° C.

  Subsequently, the said shaping | molding die 100 is pressed from the downward direction of the chrysanthemum type | mold element 11 in the state in which the axial direction turned to the perpendicular direction. Then, the photocurable resin in the mold 100 is press-fitted into the lower end portion 12b of the chrysanthemum type element 11 (see FIG. 12). Thereafter, with the mold 100 kept pressed, the up and down direction of the chrysanthemum type element 11 is reversed, and from this state, irradiation with visible light, ultraviolet light, etc. is performed for a predetermined time (about 30 seconds) (see FIG. 13). ). At the time of this reversal, the reinforcing sheet 18 sinks in the liquid photocurable resin and is disposed at a position where one surface thereof contacts the upper end surface of the chrysanthemum element 11. As a result, a seal portion 14 is formed on the upper end portion 12 a of the chrysanthemum type element 11. In this seal portion 14, the main seal part 14 a is exposed from the upper end surface of the chrysanthemum type element 11, while the adhesion part 14 b penetrates between adjacent pleats 16 of the chrysanthemum type element 11, and further the chrysanthemum type element 11 (nonwoven fabric) ) It penetrates the resin inside.

(5) Effects of Example 1 In the present Example 1, since the seal portions 14 and 15 made of a photo-curable resin are integrally provided on the upper end portion 12a and the lower end portion 12b of the chrysanthemum type element 11, as in the conventional case. In addition, it is not necessary to use a separate sealing member as compared with the case where the sealing member is bonded by a hot melt adhesive, and the number of parts can be reduced. Further, there is almost no problem of deformation due to standing at high temperature, no high-temperature heating step is required, it can be produced with a simple and inexpensive production facility, and curing can be performed in a relatively short time.

  In Example 1, since the ring-shaped reinforcing sheet 18 having a mesh structure is provided inside the seal portions 14 and 15, the chrysanthemum element 11 of the seal portions 14 and 15 is used when the oil filter 1 is used. Excellent durability and heat resistance against a strong tensile force generated on the outer peripheral side of the end face in the axial direction can be exhibited, and deterioration of the seal portions 14 and 15 is suppressed. Further, when the seal portions 14 and 15 are molded, the photocurable resin is easily transmitted through the reinforcing sheet 18 and has a predetermined light transmittance. Therefore, the workability of the seal portions 14 and 15 is improved. Can be improved.

  Further, in the first embodiment, since a large number of voids in the reinforcing sheet 18 are set to 100 per inch square, it is easy to allow the photocurable resin to permeate the reinforcing sheet 18 and process the seal part. The property can be further improved.

  In Example 1, the ratio (T1 / T2) between the light transmittance T1 of the polyester reinforcing sheet 18 and the light transmittance T2 of the photocurable resin (acrylic resin) is set to about 1.0. Therefore, the light transmittance of the reinforcing sheet 18 and the photocurable resin becomes substantially the same, and the workability of the seal portions 14 and 15 can be further improved.

  In Example 1, since the ratio (t / h) between the thickness t of the reinforcing sheet 18 and the height h of the main seal portion 14b is set to 0.4, the seal portions 14 and 15 themselves The necessary and sufficient reinforcing effect by the reinforcing sheet 18 can be exhibited while ensuring the appropriate strength and elasticity.

  In the first embodiment, one surface of the reinforcing sheet 18 is in contact with the axial end surface of the chrysanthemum element 11, and the outer peripheral edge of the reinforcing sheet 18 is connected to the seal portions 14 and 15 (main seal portions). 14a, 15a) is located on the inner side of the outer peripheral edge of the oil filter 1, and the distance a between the outer peripheral edge of the reinforcing sheet 18 and the outer peripheral edge of the sealing members 14, 15 is set to 0.3 mm. At the time of use, a very strong reinforcing effect can be exerted against the strong tensile force generated on the outer peripheral side of the end face in the axial direction of the chrysanthemum element 11 in the seal portions 14 and 15.

  Further, in the method of manufacturing the filter body of the first embodiment, first, the reinforcing sheet 18 is disposed on the end face in the axial direction of the chrysanthemum element 11, and then the viscosity is applied to the surface of the disposed reinforcing sheet 18. A photocurable resin of 48000 ± 5000 mPa · s is arranged, and then the photocurable resin is photocured in a state where the mold 100 is applied to the arranged photocurable resin, so that the chrysanthemum element 11 Since the seal portions 14 and 15 are formed at the end portions in the axial direction, the manufacturing process and the number of parts can be minimized, and the curing conditions (e.g., viscosity, temperature) of the photocurable resin can be reduced. , Light irradiation time, strength, etc.) can be more easily managed and workability can be improved. Further, at the upper end portion 12a and the lower end portion 12b of the chrysanthemum type element 11, the photocurable resin is infiltrated to an appropriate depth without being too shallow and not too deep, and the adhesive strength of the seal portions 14 and 15 to the chrysanthemum type element 11 is improved. be able to.

  Further, in another manufacturing method of the filter body of Example 1, first, the reinforcing sheet 18 is arranged inside the mold 100, and then the photocurable resin having a viscosity of 48000 ± 5000 mPa · s is filled, and then, With the mold 100 applied to the end face of the chrysanthemum type element 11 in the axial direction, the vertical direction of the chrysanthemum type element 11 is inverted, and then the photocurable resin is photocured to make the axial direction of the chrysanthemum type element 11. Since the seal portions 14 and 15 are formed at the ends of the resin, the manufacturing process and the number of parts can be minimized, and the curing conditions of the photocurable resin (for example, viscosity, temperature, light irradiation) Time, strength, etc.) can be managed more easily and workability can be improved. Further, at the upper end portion 12a and the lower end portion 12b of the chrysanthemum type element 11, the photocurable resin is infiltrated to an appropriate depth without being too shallow and not too deep, and the adhesive strength of the seal portions 14 and 15 to the chrysanthemum type element 11 is improved. be able to. Furthermore, when the chrysanthemum type element 11 is reversed, the reinforcing sheet 18 can be lowered in the photocurable resin so that one surface of the reinforcing sheet 18 can be suitably brought into contact with the end face of the chrysanthemum type element 11. .

[Example 2]
Next, the filter body 20 according to the second embodiment will be described.
As shown in FIGS. 14 and 15, the filter body 20 includes a chrysanthemum-shaped element 21 and disc ring-shaped seal portions 24 and 25 provided at the upper end 22 a and the lower end 22 b of the chrysanthemum-shaped element 21. ing.

  The chrysanthemum-shaped element 21 is formed in a chrysanthemum shape by bending a filter medium made of a nonwoven fabric in the same manner as in the first embodiment, and has a large number of pleats 26. Here, in Example 1, the adjacent pleats 16 of the chrysanthemum type element 11 were adhered by the adhesive layer 17 (thermoplastic adhesive), but in this Example 2, the adjacent pleats 26 of the chrysanthemum type element 21 were adhered. Are not bonded by an adhesive layer (thermoplastic adhesive).

The seal portions 24 and 25 extend over the entire region of the both end surfaces in the axial direction of the chrysanthemum element 21 (region including the end surfaces between adjacent pleats).
The seal portions 24 and 25 are formed of a photocurable resin (for example, acrylic resin) in the same manner as in the first embodiment, and have substantially the same functions as the seal portions 14 and 15 in the first embodiment.・ It shall show properties.

Further, a ring-shaped reinforcing sheet 28 (illustrated as a “reinforcing member” according to the present invention) having a large number of gaps is provided inside the seal portions 24 and 25. The surface areas of the reinforcing sheet 28 and the seal portions 24 and 25 are substantially the same.
The reinforcing sheet 28 is made of a polyester resin in the same manner as in the first embodiment, and exhibits substantially the same functions and properties as the reinforcing sheet 18 in the first embodiment.

According to the second embodiment, in addition to the functions and effects of the first embodiment, the seal portions 24 and 25 enter between the adjacent folds 26 of the chrysanthemum element 21 and further in the chrysanthemum element 21 (nonwoven fabric). Therefore, there is no need to use the chrysanthemum element 11 bonded by an adhesive layer (thermoplastic resin or the like), and the manufacturing cost and the manufacturing time can be reduced.
In addition, the filter body 20 of the second embodiment can be obtained by applying the same manufacturing method as that of the first embodiment.

Example 3
Next, the filter body 30 according to the third embodiment will be described.
As shown in FIGS. 16 and 17, the filter body 30 includes a chrysanthemum element 31 and radial ring-shaped seal parts 34 and 35 provided at the upper end 32 a and the lower end 32 b of the chrysanthemum element 31. ing.

  In the chrysanthemum type element 31, the adjacent pleats 36 are not bonded by an adhesive layer (thermoplastic adhesive) in the same manner as in the second embodiment.

The seal portions 34, 35 extend along folds 36 on both end surfaces of the chrysanthemum element 31 in the axial direction.
The seal portions 34 and 35 are formed of a photocurable resin (for example, acrylic resin) in the same manner as in the first embodiment, and have substantially the same functions as the seal portions 14 and 15 in the first embodiment.・ It shall show properties.

In addition, a ring-shaped reinforcing sheet 38 (illustrated as a “reinforcing member” according to the present invention) having a large number of voids is provided in a predetermined portion on the inner peripheral side inside the seal portions 34 and 35. ing.
The reinforcing sheet 38 is made of a polyester resin in the same manner as in the first embodiment, and exhibits substantially the same functions and properties as the reinforcing sheet 18 in the first embodiment.

According to the third embodiment, in addition to the operation and effect of the second embodiment, the amount of the photocurable resin to be used can be minimized, further reducing the manufacturing cost and the manufacturing time. Can be achieved.
In addition, the filter body 30 of the third embodiment can be obtained by applying the same manufacturing method as that of the first embodiment.

  In addition, in this invention, it can be set as the Example variously changed within the range of this invention based on the objective and a use, without being restricted to the said Examples 1-3. That is, in Examples 1 to 3, one surface of the reinforcing sheets 18, 28, and 38 is brought into contact with the end faces of the chrysanthemum elements 11, 21, and 31, but this is not a limitation. As shown in FIG. 18, one surface of the reinforcing sheet 18 may not be brought into contact with the end face of the chrysanthemum type element 11, that is, the reinforcing sheet 18 may be disposed so as to be positioned at an intermediate portion of the main seal portion 14 a. .

  In Examples 1 to 3, the outer peripheral edges of the reinforcing sheets 18 and 28.38 are positioned more inside than the outer peripheral edges of the seal portions 14 (15), 24 (25), and 34 (35). For example, as shown in FIG. 19, the outer peripheral edge of the reinforcing sheet 18 may be positioned outside the outer peripheral edge of the sheet portion 14 (15).

  In the first embodiment, the molding die 100 is pressed against the chrysanthemum type element 11. However, the present invention is not limited to this. For example, the chrysanthemum type element 11 is pressed against the molding die 100, or both May be relatively approached.

  Further, in Example 1, a non-photocurable resin is used as an adhesive for adhering the vicinity of the upper end (lower end) inside the pleats 16 adjacent to each other. A photo-curable resin can be used. Thereby, the adhesion | attachment time of the upper end part and lower end part which adjoin each other among the inner surfaces of the pleat 16 and its vicinity can be shortened. Further, in the first embodiment, only the vicinity of the upper end portion 13a and the vicinity of the lower end portion 13b inside the pleats 16 adjacent to each other are bonded, but the present invention is not limited to this, and the vicinity of the upper end portion 13a and the vicinity of the lower end portion. In addition to 13b, the upper end portion 12a and the lower end portion 12b inside the fold 16 adjacent to each other are bonded, or only the upper end portion 12a and the lower end portion 12b inside the fold 16 adjacent to each other are bonded. You may make it.

  It is used as a technique for filtering fluid. In particular, it is suitably used as a technique for filtering oil, air, fuel, etc. used in vehicles.

It is the side view made into the one-side cross section of the oil filter which concerns on Example 1. FIG. 1 is a plan view of a filter body according to Example 1. FIG. It is the side view made into the one side cross section of the filter body which concerns on Example 1. FIG. It is an enlarged view of the A section of FIG. 4 is a plan view of a main part of a reinforcing sheet according to Example 1. FIG. It is explanatory drawing for demonstrating the manufacturing method of the filter body which concerns on Example 1, and shows the top view of the chrysanthemum type | mold element before photocuring resin is apply | coated. It is explanatory drawing for demonstrating the manufacturing method of the filter body which concerns on Example 1, and shows the side view made into the one-side cross section of the chrysanthemum type | mold element before photocurable resin is apply | coated. It is explanatory drawing for demonstrating the manufacturing method of the filter body which concerns on Example 1, and shows the top view of the chrysanthemum type | mold element after photocuring resin was apply | coated. It is explanatory drawing for demonstrating the manufacturing method of the filter body which concerns on Example 1, and shows the side view made into the one-side cross section of the chrysanthemum type | mold element after the photocurable resin was apply | coated. It is explanatory drawing for demonstrating the manufacturing method of the filter body which concerns on Example 1, and shows the state by which the shaping | molding die was applied to the upper end surface of the chrysanthemum type | mold element. It is explanatory drawing for demonstrating the other manufacturing method of the filter body which concerns on Example 1, and shows the state by which the reinforcement sheet | seat and photocurable resin were arrange | positioned by the shaping | molding die. It is explanatory drawing for demonstrating the other manufacturing method of the filter body which concerns on Example 1, and shows the state by which the shaping | molding die was applied to the lower end surface of the chrysanthemum type | mold element. It is explanatory drawing for demonstrating the other manufacturing method of the filter body which concerns on Example 1, and shows the state which reversed the chrysanthemum type | mold element. 6 is a plan view of a filter body according to Example 2. FIG. It is the side view made into the one-side cross section of the filter body which concerns on Example 2. FIG. 6 is a plan view of a filter body according to Example 3. FIG. It is the side view made into the one-side cross section of the filter body which concerns on Example 3. FIG. It is explanatory drawing for demonstrating the other arrangement | positioning form of a reinforcement sheet. It is explanatory drawing for demonstrating the other arrangement | positioning form of a reinforcement sheet.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1; Oil filter, 2; Casing, 4; Relief valve, 5; Check valve, 10, 20, 30; Filter body, 11, 21, 31; Chrysanthemum type element, 12a, 22a, 32a; Upper end part, 12b, 22b 32b; lower end portion, 14, 15, 24, 25, 34, 35; seal portion, 18, 28, 38; reinforcing sheet, 100;

Claims (12)

In a filter body in which seal portions made of a photocurable resin are provided at both ends in the axial direction of the cylindrical chrysanthemum type element,
A filter body, wherein a ring-shaped reinforcing member having a large number of voids is provided inside the seal portion.   The filter body according to claim 1, wherein the reinforcing member is a reinforcing sheet having a mesh structure.   The reinforcing member is made of synthetic resin, and the ratio (T1 / T2) between the light transmittance (T1) of the reinforcing member and the light transmittance (T2) of the photocurable resin is 0.7 to 1.3. The filter body according to claim 1 or 2.   The ratio (t / h) between the thickness (t) of the reinforcing member and the height (h) from the axial end surface of the chrysanthemum element to the seal surface of the seal portion is 0.1 to 0.8. The filter body according to any one of claims 1 to 3.   The filter body according to any one of claims 1 to 4, wherein the plurality of voids is 30 to 250 per square inch.   The filter body according to any one of claims 1 to 5, wherein one surface of the reinforcing member is in contact with an end face in the axial direction of the chrysanthemum element.   The outer peripheral edge of the reinforcing member is located inside the outer peripheral edge of the seal portion, and the distance (a) between the outer peripheral edge of the reinforcing member and the outer peripheral edge of the seal member is 3 mm or less. The filter body as described in any one of 6. A method for producing a filter body according to any one of claims 1 to 7,
Disposing a ring-shaped reinforcing member having a large number of voids on the axial end face of the cylindrical chrysanthemum-shaped element;
Disposing a photocurable resin on the surface of the disposed reinforcing member;
In a state where a transparent mold is applied to the arranged photocurable resin, the photocurable resin is photocured to form a seal portion at an end portion in the axial direction of the chrysanthemum type element;
The manufacturing method of the filter body characterized by comprising. A method for producing a filter body according to any one of claims 1 to 7,
Disposing a ring-shaped reinforcing member having a large number of voids and a photocurable resin inside a transparent mold; and
A step of photocuring the photocurable resin to form a seal portion at an end portion in the axial direction of the chrysanthemum type element in a state where the molding die is applied to an end face in the axial direction of the cylindrical chrysanthemum type element; ,
The manufacturing method of the filter body characterized by comprising. The step of disposing is a step of disposing the reinforcing member in the mold, and then disposing the photocurable resin,
In the forming step, the vertical direction of the chrysanthemum type element is reversed while the molding die is applied to the lower end surface in the axial direction of the chrysanthemum type element whose axial center is directed in the vertical direction. The method for producing a filter body according to claim 9, which is a step of photocuring the photocurable resin.   The method for producing a filter body according to any one of claims 8 to 10, wherein the photocurable resin has a viscosity of 10,000 to 100,000 mPa · s. The filter body according to any one of claims 1 to 7, a storage body that stores the filter body, and an upper support portion and a lower support portion that are provided in the storage body and support the filter body from above and below. And comprising
The fluid filter, wherein the seal portion seals between both axial end surfaces of the chrysanthemum element and the upper support portion and the lower support portion.

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