JPH0350965Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Field] The present invention relates to a filter element used for example in a lubricating filter for an internal combustion engine. [Prior Art] As a conventionally known over-element of this type, there is one described in JP-A-60-87817. This method involves bending a strip of material to form a plurality of pleats, arranging the pleats adjacent to each other in the radial direction, structuring the whole in a ring shape, and furthermore, creating a space between opposing pleats between adjacent pleats. The inside and outside of the ring-shaped structure are alternately communicated with each other, and the upper and lower ends of the space that communicates with the inside are closed with a hot-melt resin adhesive to form a bag-like structure. In the over-element having the above structure, the closing part made of hot-melt resin adhesive is
As described in Japanese Patent No. 43931, a common method is to adhere and seal the opposing surfaces of both ends of the material with the above-mentioned adhesive. [Problems to be solved by the invention] However, the process of applying adhesive to opposing surfaces at both ends of the material is extremely troublesome, and furthermore,
60-87817 publication, the over-element has a structure in which almost the entire area of both end faces of the element is closed with a resin adhesive layer (Japanese Patent Application No. 59-92762, filing date: April 23, 1982) In Japan), it is necessary to apply adhesive again to both end surfaces of the element after gluing the above materials. Therefore, in the conventional method, the process of bonding materials with an adhesive is troublesome, and problems such as quality variations due to over-application of adhesive occur, which is a major difficulty in practical use. [Means for Solving the Problems] In view of the above-mentioned points, the present invention includes an adhesive sheet in which a resin adhesive layer is formed on a flexible base material, and the sheet is attached in a ring shape through the adhesive layer. It has a structure in which the end face is closed by adhering to the end face of the material. [Function] According to the present invention, the end face of the ring-shaped member can be closed simply by adhering the adhesive sheet having the above structure to the end face. In addition, since it uses an adhesive sheet,
Overcoating of the adhesive can be avoided, and furthermore, the adhesive layer can be protected by the base material of the sheet. Furthermore, since the base material is flexible, it adapts to the unevenness of the end surface of the material. [Effects of the Invention] As described above, the present invention has the excellent effect of simplifying the process of closing the end face of the ring-shaped member and stabilizing the quality of the closing part. [Examples] The present invention will be described in detail below using specific examples. An example of a hyperelement with a high density material is shown. In FIGS. 1 and 2, the ring-shaped material 9 is provided with a plurality of wavy-shaped portions 1a formed by bending the material 1 itself into pleats. The bent parts 1b of the parts 1a are made to face each other, and a space 2 is formed between the facing parts.
a, 2b, and the spaces 2a, 2b.
The overall structure is ring-shaped so that a plurality of opposing portions 3a and 3b are provided. Also, in order to maintain the ring shape, both ends of the material 1 are glued with an adhesive (for example, a polyamide-based or polyester-based hot-melt resin adhesive, hereinafter referred to as hot-melt adhesive) at point A in Fig. 2. It is joined. In the plurality of opposing portions of the ring-shaped member 9 having the above configuration, the voids 2 formed in the opposing portions 3a
a communicates with the inner space 4 of the ring-shaped member 9. That is, in the opposing portion 3a, the waveform portion 1
Since the facing portions of the bent portions 1b of a are slightly apart as shown by X in the figure, the empty spaces 2a in the facing portions 3a
All of them communicate with each other and with the inner space 4 of the ring-shaped member 9. Further, the spaces 2b in the other plurality of opposing portions 3b of the ring-shaped member 9 are isolated so as not to communicate with the inner space 4 of the member 9. That is, in this opposing portion 3b, since the innermost portions of the mutually opposing waveform shapes 1a are integrally connected, the connecting portion 5 does not communicate with the inner space 4 of the ring-shaped member 9. be. Both ends of the above-mentioned ring-shaped material are adhered with the adhesive sheet of the present invention to form a bag-like shape. Adhesive sheet 6
is composed of a heat-releasable and meltable flexible base material 6a and an adhesive layer 6b. As shown in FIG. 6, the sheet 6 has the same planar shape as the end surface of the material 1, and the role of the base material 6a is to set adhesive on both end surfaces of the ring-shaped material 9 and to attach it to a hot plate or the like. In forming a bag-like portion by heat-pressing and closing with a jig, the main functions are as follows. Prevents adhesive from staining thermocompression bonding jigs such as hot plates (role of mold release). Prevents defects such as sink marks and pinholes in the adhesive layer when it melts and flows (during bonding work). Reinforcement of adhesive layer. Therefore, as the base material 6a, a thin and flexible material that does not melt due to the heat during the bonding process and has workability such as punchability or rollability, that is, a flexible material that is difficult to melt under heat is used. For example, paper with a thickness of about 130 μm (for example,
Kraft paper, masking paper, etc.), iron foil, nickel foil, etc. with a thickness of about 10 μm can be used. However, considering cost, paper is suitable, and considering high-speed adhesion, aluminum foil is suitable. In addition,
Table 1 shows the high-speed adhesion effect of aluminum foil.

[Table] In this way, the adhesive dissolves quickly and high-speed adhesion is possible. In addition, the thickness of this base material is determined in terms of strength,
Considering roll formation, the thickness is preferably 10 μm to 200 μm. On the other hand, the adhesive layer 6b is a hot melt adhesive (for example, a polyamide hot melt adhesive).
DPXH610: Manufactured by Benkel Hakusui Co., Ltd.
NOVAMID1030: manufactured by Mitsubishi Kasei Corporation, polyester hot melt PES-X-412: manufactured by Toagosei Chemical Industry Co., Ltd.) or B-stage epoxy resin (NET-1200: manufactured by Nitto Denko Corporation), etc. are applicable. be. From the perspective of mass production (quality, cost, workability, etc.), the adhesive should be a hot melt adhesive with a softening point of 150°C or higher, and the thickness of the adhesive layer should be 50 μm to 600 μm as shown in Table 2. Are better.

[Table] In addition, the viscosity of the adhesive is preferably between 5 poise and 15,000 poise during melt bonding to prevent it from being sucked into the paper. Note that the base material and the adhesive layer are not necessarily limited to being bonded together, but the base material and the film adhesive may be separately supplied and bonded together. Next, a more detailed explanation including the bonding process will be added. First, bend the material to form an annular body (for example, a second
(as shown in the figure), and the end of material 1 (A in Figure 2).
The ring-shaped member 9 is formed by bonding the dots with an adhesive (for example, a polyamide hot-melt adhesive). On the other hand, the rolled adhesive sheet 6 (FIG. 5) is punched out in accordance with the shape of the end face of the ring-shaped material 9 to form a sheet having the shape as shown in FIG. 6. The sheet 6 is placed on both ends of the ring-shaped material 9 with the adhesive layer 6b on the material side and aligned, and then heated and pressed from the base material 6a side with a hot plate or the like to melt the adhesive layer 6b. By closing both ends of the material 9, a bag-shaped portion (see FIGS. 3 and 4) is formed. The flow path of liquid to the over-element thus formed will be explained. For example, when the unfiltered fluid flows from below the filter element, the fluid flows into the spaces 2b of the plurality of opposing parts, and separates the spaces 2b from the spaces 2a of the bag-like part 7. It passes through the wave-shaped portion 1a and reaches the cavity 2a of the bag-shaped portion 7. The fluid that has flowed into the cavity 2a of the bag-shaped portion 7 passes through the opening of the cavity 2a, that is, the opposing gap It flows out into the inner space 4. When the fluid passes through the corrugated portion 1a, it is filtered through the corrugated portion 1a and becomes clean. As for the shape of the adhesive sheet suitable for the ring-shaped material of the fluid flow path, a shape with a slit-like opening 8 as shown in FIG. 7 is preferable. When this is applied, the excess element becomes as shown in FIG. Alternatively, an adhesive sheet having the structure shown in FIG. 9 may be used. As an example of the use of a filter element having such an overaction, a lubricating oil filter for an internal combustion engine will be described below. In FIG. 10, the over-element 10 of the present invention has a metal cylinder 1 with a hole inside.
1 is housed in a metal container 12 in a fixed state. The open end of the container 12 has a screw hole 13 in the center.
a ring-shaped metal end plate 13 having a plurality of openings 13b on its outer periphery is disposed, and the end plate 13
A thin ring plate 18 is welded and fixed to the container 12 and is lock seamed around the open end of the container 12. In the figure, 14 is a rubber check valve, 15 is a spring, 16 is a metal end plate fixed to the cylinder 11, and 17 is a rubber gasket. In this filter, lubricating oil flows as shown by the arrow in the figure. In addition, the adhesive sheet is attached to the facing part 3 in FIG.
It may be a circular sheet of such a size that the outer peripheries of the corners of a and 3b touch each other. It goes without saying that the present invention can be applied to the conventional element shape of a chrysanthemum-shaped annular body, and can also be applied to internal combustion engine air purifiers in addition to lubricating oil filters for internal combustion engines.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a plan view showing the ring-shaped member in Figure 1, Figure 3 is a partial cross-sectional perspective view of Figure 1, Figure 4 is a sectional view taken along the - line in Figure 3, and Figure 5 is used in the present invention. FIG. 6 is a perspective view showing an example of the shape of the adhesive sheet used in the present invention; FIGS. 7 and 9 are plan views showing other examples of the shape of the adhesive sheet cut out; FIG. 8 is a perspective view of the sheet; is a perspective view showing another embodiment of the present invention;
FIG. 10 is a sectional view showing an example of the application of the present invention. DESCRIPTION OF SYMBOLS 1... Material, 6... Adhesive sheet, 6a... Base material, 6b... Adhesive material layer, 9... Ring-shaped material.

Claims (1)

[Claims for Utility Model Registration] (1) An adhesive sheet having an adhesive layer formed on a flexible base material, and a ring-shaped material, the adhesive sheet being able to A cross-element characterized in that it is bonded to an end face of a ring-shaped material, and the end face is closed. (2) The substrate is heat-refractory and is one selected from the group consisting of kraft paper, masking paper, aluminum foil, iron foil, nickel foil, and copper foil. The over-element described in claim 1 of the patent registration claim. (3) The utility model according to claim 1 or 2, wherein the adhesive layer is one of hot-melt resin adhesives selected from polyamide-based and polyester-based adhesives. element. (4) The superelement according to claim 1, wherein the base material has a thickness of 10 μm to 200 μm. (5) The over-element according to claim 3, wherein the adhesive layer has a thickness of 50 μm to 600 μm. (6) The superelement according to claim 5, wherein the adhesive layer has a viscosity of 5 poise to 15,000 poise when melted.