JPS62216618A - Manufacture of filter element - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of manufacturing a filter element used, for example, in a vacuum remover or an air cleaner for an automobile.

(Prior Art) A conventional filter element used, for example, in an automobile air cleaner is schematically shown in FIG. The filter element 2 is housed in a cleaner case 3, and outside air introduced from an air intake port 20 provided on a side wall of the cleaner case 2 is passed through the filter element 2 and filtered. The air is then supplied to an intake passage 4 of an internal combustion engine (not shown).

By the way, as for the manufacturing method of the filter niremen 1-2, end plates 5.58 are adhered to the upper and lower ends of the membrane to close it, and air filtration is performed using these end plates 5.
．． This is carried out only with the element cable material 1 between the sections 5a. However, in such a conventional filter element 2, since the end plate 5.5 is formed of a steel plate or the like, lff1 increases, and only one side of the element material 1 is used for filtration. Since the filtration area is not used, the filtration area is not very large, and an attempt to expand the filtration area inevitably necessitates an increase in the size of the filter membrane 1-2.

Therefore, for example, as disclosed in Japanese Utility Model Application Publication No. 48-69472M, an element material bent in a bellows shape is bent from the middle to form an L-shape, and one part of the bending width is converged in the center. Join both ends of the material to the bottom i! ! A cylindrical filter has been proposed, which eliminates the need for one end plate and increases the filtration area.

However, in the filter disclosed in the above-mentioned publication, the center of the element material must be opened, which not only complicates the assembly of the element, but also does not increase the filtration area sufficiently.

On the other hand, as a technology to solve such problems, a method for manufacturing a filter in which one end plate of the filter element is abolished and not only the side surface of the element material but also the top surface is used for filtration is disclosed in Japanese Patent Publication No. 37-6474. , is disclosed in Japanese Patent Publication No. 53-879, but these manufacturing methods have the following problems.

(Problems to be Solved by the Invention) In other words, the techniques disclosed in the above-mentioned publications all mix filter medium fibers in a liquid and spray or deposit the mixture onto a mold to form a filter element. The filter element manufactured by this method has a small layer thickness and density of the filter medium, and although it can be used as a filter for smoke masks for short term use, it is not suitable for use in air cleaners for automobiles, for example. This technology could not be applied directly to filters that are used continuously for long periods of time.

In view of these conventional problems, the present invention provides a method for manufacturing a filter element that eliminates one end plate and increases the filtration area by devising a way to fold the element material. With the goal.

(Means for Solving the Problems) In order to achieve the above object, in the method for manufacturing a filter element of the present invention, mountain fold lines and valley fold lines are alternately arranged at predetermined intervals on one sheet of sheet 1-shaped filter paper. A center fold line and an edge fold line are provided at the center and both ends of the paper, respectively, perpendicular to the mountain fold line and the valley fold line, and from the intersection of the edge fold line and the mountain fold line or the valley fold line, the inside of the filter paper is provided. Alternatively, a pair of mountain-shaped serrated fold lines are formed outwardly, and with the filter paper folded along the mountain fold line and the valley fold line, the portion between the end fold line and both edges of the filter paper is formed into each serrated shape. After forming a pair of side walls by bending at right angles in the same direction along the fold line, both ends of the side walls are glued together to form an annular shape, and a frame plate is glued to the lower edge of the side walls. Characteristics and Juru.

(Examples and effects) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2.3 shows a filter element 10 manufactured according to the present invention, and as shown in FIG. The mountain fold line 11a shown by the broken line in the figure and the direction of the valley fold line 11b shown by the two-dot chain line in the figure are alternately set (hereinafter, the mountain fold line is shown by the broken line and the valley fold line is shown by the two-dot chain line).

Then, at both ends of the element material 11 along the direction of each of these fold lines 11a and 11b, the mountain fold line 11a and the valley fold 1i are attached.
Similar to 111b, fold lines 11c and 11d are folded into mountains and valleys.
and a center fold line J: perpendicular to the mountain fold line 11a and the valley fold line 11b, and a pair of end fold lines 11f and ll.
Provide f.

Furthermore, a mountain-shaped # is formed on the outside of each end broken line 11f, 11f.
A6IiI-shaped broken lines 11e and 11e are provided, respectively.

After forming each of the fold lines 11a to 11e as described above, first, as shown in FIG. 4(B), the mountain fold line 11a,
The element material 11 is bent into a bellows shape along the valley fold line 11b.

Next, fold the ends 1! jl11f, 11f and element) - A pair of side wall portions 12, 12 are formed by bending the portions between both ends of the material 11 at right angles downward via sawtooth fold lines 11e, 11e, respectively (Fig. 4). (See (C)).

Then, both ends of the side wall portions 12.12 are bent in a direction toward each other around the center fold line (indicated by a dashed line in the figure) of the bellows-shaped bent portion, as shown in FIG. 4(D).
The fold lines 11a and 11b extend radially outward from the center of the fold lines 11a and 11b to form a circular shape as a whole.

Both ends in the direction perpendicular to 11b and both ends of the central bellows portion 13 continuous with these ends are joined, and this joint is sealed with a sealing material. In the element cable material 11 bent and formed in this way, the side wall portion 12 is annular and the side wall portion 1
One end (upper end) of 2 is closed by the central bellows portion 13.

Then, a ring-shaped frame plate 14 as an end plate is attached to the lower end edge of the element material 11, as shown in FIG. 2.3. This frame plate 14 is formed to have a larger diameter than the outer diameter of the side wall portion 12, and this large diameter portion serves as a mounting flange 14a.

Above J: Filter element 10 manufactured by
As shown in Fig. 5.6, the case body 20 has a cylindrical shape with a bottom.
A cover 2 that closes the upper opening of the case body 20
1 and is housed in a cleaner case 22 comprised of 1 and 1. An air intake port 23 is formed in the side wall 20a of the case body 20, and the bottom surface 20b of the case body 20 is formed with an air intake port 23.
An air supply port 24 communicating with an intake passage (not shown) is formed in the medium heat. And the filter element 10
The frame plate 14 is arranged concentrically around the periphery of the air supply 24, and a flange 14a is fixed to the bottom surface 20b with screws 25. At this time, the central bellows part 1 of Elmmen 1 to Material 11
3 and the cover 21 are provided with an appropriate distance.

Now, in the filter element 10 of this embodiment manufactured through the above-mentioned steps, the niremen 1-material 11 is formed into an annular side wall portion 1 by bending one sheet-like material.
2, and a central bellows portion 13 that closes the upper end of this side wall portion 12.
is formed, and outside air introduced from the air intake port 23 of the cleaner case 22 passes through the side wall portion 12 and the central bellows portion 13 and is supplied to the air supply port 24. Therefore, the air filtration function is performed not only by the side wall portion 12 but also by the central bellows portion 1.
3, the filtration area is significantly increased.

Incidentally, the bellows-shaped bent portion of the central snake IIO portion 13 serves as a reinforcing portion to prevent the bending and maintain a predetermined shape.

By the way, in the embodiment described above, the central bellows portion 13 has a substantially circular shape, but the present invention is not limited to this.
As shown in the figure, the central bellows portion 13 may be formed into an elliptical shape by reducing the degree of concentration at the center of the bellows portion. In this case, the side wall portion 12 also has an elliptical shape, and accordingly, the shape of the frame plate 14 also has an elliptical shape.

8A, B, C, and D show other embodiments of the present invention, in which a mountain fold line 30a and a valley fold line 3 of a sheet-like element material 30 are shown.
An end fold line 30d perpendicular to 0b.

30d is provided with sawtooth folding lines 30c, 30c, and bent through these folding lines in the same manner as in FIGS. 4A-D to form a pair of side wall portions 31.31. Incidentally, each fold line 300° 30f of this side wall portion 31 is the mountain fold 130a as in the previous embodiment.

Lines corresponding to extensions of the valley fold line 30b are similarly mountain folds and valley folds. Then, as in the embodiment described above, both ends of the side wall portions 31 and 31 are bent in directions approaching each other around the center of the bellows-shaped bent portion (dotted chain line in the figure), and the side wall portions 31 and the central bellows portion 32 Join each end of the Element cable material 3 manufactured by bending in this way
By using o, it is possible to have the same function as in the above embodiment.

FIG. 9 shows another usage example of the filter niremen h10, in which the cleaner case 40 is connected from the air intake port 42 formed on the bottom surface 41a of the case body 41 to the air supply port 44 formed on the h bar 43. Air flows axially toward the flange 148 of the filter element 1-10 between the case body 41 and the cover 43.
is installed. Of course, even in this case, an appropriate interval is provided between the side walls of the filter elements 1 to 10 and the side wall of the case body 41, so that the outside air introduced from the air intake port 42 flows through the side wall of the filter element 10. The air is supplied to the air supply port 44 through the central bellows section and the central bellows portion, thereby significantly increasing the filtration area.

(Effects of the Invention) As explained above, in the filter element manufacturing method of the present invention, one end of the annular side wall portion is closed by the central bellows portion by bending one sheet-like element material. Therefore, the IS plate at the end becomes unnecessary. Therefore, the weight of the filter element can be reduced, and together with the reduction in the number of parts, the cost can be reduced.

Further, since the side wall portion and the entire central bellows portion have a filtering function, the filtering area is significantly increased, and various excellent effects such as miniaturization of the filter element can be achieved.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing a conventional filter element in the I state; Fig. 2 is a perspective view of a filter element obtained by carrying out the method of the present invention; and Fig. 3 is a partial cross-section of the filter element of Fig. 2. Side view, Figure 4 A, B, C, DG
5 is an explanatory diagram showing one embodiment of how to fold the element material of the present invention step by step. FIG. 5 is a top plan view showing the installed state of the filter element in FIG. FIG. 7 is a cross-sectional view, and FIG. 8 is a perspective view of a filter element manufactured according to another embodiment of the present invention, and FIGS. Δ, B, and C. D is an explanatory diagram sequentially showing another example of how to fold the element material of the invention, and FIG. 9 is a cross-sectional side view showing another example of the mounting state of the filter element of the invention. 10...Filter element 11.30...Element material 11a, 30a...Mountain fold line 11b, 30b...Valley fold line 12.31...Side wall part

Claims (1)

[Claims] (1) A sheet of filter paper is provided with mountain fold lines and valley fold lines alternately at predetermined intervals, and a center fold line and an end fold line are provided at right angles to the mountain fold lines and valley fold lines at the center and both ends of the filter paper, respectively. A pair of sawtooth fold lines are formed inwardly or outwardly of the filter paper from the intersection of the end fold line and the mountain fold line or the valley fold line, and the filter paper is folded along the mountain fold line and the valley fold line. In this state, the portion between the end fold line and both ends of the filter paper is bent at right angles in the same direction via each serrated fold line to form a pair of side walls, and then both ends of the side wall are folded. A method for manufacturing a filter element, comprising: adhering them together to form an annular shape, and adhering a frame plate to the lower edge of the side wall portion.