JPH0414083Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a filter element used in a filter for purifying oil in an engine lubrication system.

(Prior art) A filter for purifying oil in an engine's lubrication system is made by forming paper into a chrysanthemum-shaped cylinder, reinforcing the inside with a perforated inner cylinder, and providing end plates at the top and bottom ends. Generally, oversized elements are used, but recently, in order to increase the amount of paper that can be accommodated in a case with a certain volume, that is, to make the oversurface area of the element as large as possible, paper 11 is pleated so that each ridge forms an M-shape in plane with two long pieces 11a on both sides and two short pieces 11b on the inside to form an M-folded chrysanthemum-shaped cylinder, and the inside has a porous hole for reinforcement. An element is used in which a cylinder 12 is inserted and end plates 13a and 13b are attached to the upper and lower ends of the element.

(Problem to be solved by the invention) By the way, in the M-fold chrysanthemum-shaped over-element mentioned above, what are the bending points A between the long piece 11a and the short piece 11b and the bending point B between the short pieces as shown in Figure 4A? Since there is no support and the element is in a free state, when oil with increased viscosity flows into the element from the outside, such as at low temperatures in winter, it first flows to point B as shown in Figure B and Figure 3. As a result, the point A shifts significantly, and the bending point C of the long pieces 1a that are in contact with the porous inner cylinder 2 rises up, causing the folds to open at the overlapped part. A large amount of oil flows into the open part, increasing the pressure loss and lifting it, which may cause the paper to break from the bending point C.

Therefore, this invention ensures that the bending point of the paper is maintained, and even if high viscosity oil flows in from the outside, the bending point will not shift laterally and become deformed, and it can withstand long-term use without damage. It provides a superfluous element.

(Means for solving the problem) Therefore, this invention forms the paper into an M-fold chrysanthemum-shaped tube in which each mountain has a long piece on both sides and two short pieces on the inside. As a filter element of an oil filter in which a porous inner cylinder is inserted and end plates are attached to the upper and lower ends, W-shaped bent portions and V-shaped bent portions are alternately formed on the outer periphery of the above-mentioned cylindrical paper at a required height position. Continuously formed band-shaped spacers are wound and arranged, and the W
The paper is characterized in that the bent portions are fitted between the long pieces of paper and the V-shaped bent portions are fitted between the short pieces of paper.

(Example) Fig. 1 and Fig. 2 show an example of the over-element of this invention, and each mountain of paper 1 has a plane M with long pieces 1a on both sides and two short pieces 1b on the inside.
It is pleated to form an M-fold chrysanthemum-shaped tube, into which a reinforcing porous inner tube 2 is fitted, and at its upper and lower ends are plate-shaped end plates 3.
The structure of the point where a and 3b are adhered is the same as that described above.

By the way, in this invention, on the outer periphery of the M-fold chrysanthemum-shaped cylindrical paper 1 at a required height position, there is a W-shaped bent part 4a made of a paper material similar to paper, a nonwoven fabric, or a net material, as shown in FIG. A band-shaped spacer 4 is wound in one or more strips, and the W-shaped bent portions 4a are the long pieces 1a of the adjacent peaks of the M-folded tube strip 1. The V-shaped bent portion 4b is fitted to fill the gap between the short pieces 4b of each mountain, and the long piece 1a and the short piece 1b are fitted together to fill the gap between the short pieces 4b.
Each piece 1a with different openings,
1b.

In this way, the M-fold chrysanthemum flower-shaped tubular striped paper 1 is tightly held by the spacer 4 between adjacent peaks and between the short pieces 1b of each peak on the outer periphery, so that the outside of each peak of the paper 1 is tightly held. The ends, that is, the bending point A of the long piece 1a and the short piece 1b are fixed so as not to shift laterally, and accordingly, the bending point B of the short piece 1b is also supported in a fixed position, so that the viscosity becomes high at low temperatures. Even if oil flows in from the outside, the bending points A and B of paper 1
The paper does not cause lateral shifting and deformation and lifting of the paper are prevented.

Note that a strip-shaped spacer 4 is provided on the outer periphery of the M-folded tubular paper 1.
When installing the spacer, while gluing it to the bottom surface of the spacer 4, attach the M-shaped bent part 4a and the V-shaped bent part 4b
Since each bent part 4a, 4b is attached between the long piece 1a or by fitting the short piece 1b, the central part of the M-shaped bent part 4a is also glued.
The fixation of bending points A and B is further strengthened.

Also, conventional chrysanthemum-shaped cylindrical elements have been seen in which a V-shaped spacer is placed between each pile of paper, but if the folded pieces are all the same size, then This is fine in terms of oil pressure processing, but if this is applied to an M-fold chrysanthemum-shaped element, the degree of opening between the long pieces 1a and the degree of opening between the short pieces 1b will be the same, and the oil will enter from the outside. Since they bear the same burden of pressure, the short pieces 1b become clogged early, resulting in increased pressure loss and damage. Therefore, in this invention, the W-shaped bent portion 4a of the spacer 4 is interposed between the long pieces 1a, while the short pieces 1a are interposed between the long pieces 1a.
A V-shaped bent portion 4b is interposed between the two portions 4b, and the degree of opening thereof is varied between large and small, thereby making the oil processing load uniform.

(Effects of the invention) As described above, in this invention, paper is formed into an M-folded chrysanthemum-shaped tube as an over-element, and a W-shaped fold and a V-shaped fold are formed on the outer periphery of the cylindrical paper at a required height. A band-shaped spacer having alternating and continuous parts is wound and arranged, and the W-shaped bent part is fitted between the long pieces of paper, and the V-shaped bent part is fitted between the short pieces. Because they are fitted and installed, the bending points between the long and short pieces of each mountain of the cylindrical paper, as well as the bending points between the short pieces, can be held securely in place, and oil can be removed from the outside of the paper during use. Even when pressure is applied, the above-mentioned bending points do not shift laterally, preventing deformation and lifting of the paper, and in addition, oil flows in an amount commensurate with the excess surface area within each pleat, applying uniform oil pressure to each fold. The amount of dust captured per unit area is the same for all folds, and it can withstand long-term use.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of an embodiment of this invention. FIG. 2 is a sectional view taken along the - line in FIG. 1. FIG. 3 is a partially cutaway perspective view of a conventional M-fold type over-element. Figure 4A is a partial plan cross-sectional view. Figure B is a partial plan cross-sectional view showing the deformed state of the paper. In the figure, 1... paper, 1a... long piece, 1b... short piece, 2... porous inner cylinder, 3a, 3b... end plate, 4...
...Spacer, 4a...W-shaped bent part, 4b...V-shaped bent part.

Claims (1)

[Scope of utility model registration request] The paper 1 is formed into an M-fold chrysanthemum-shaped cylinder in which each mountain is formed by the long piece 1a on both sides and the two short pieces 16 on the inside, and the porous inner cylinder 2 is inserted inside the paper 1, and the ends are attached at the top and bottom ends. In the over-element of the oil filter on which the plates 3a and 3b are attached, W-shaped bent portions 4a and V-shaped bent portions 4b are alternately and continuously formed on the outer periphery of the tubular paper 1 at a required height position. A band-shaped spacer 4 is wound and arranged, and its W-shaped bent portion 4a is fitted between the long pieces 1a of the paper, and the V-shaped bent portion 4b is fitted between the short pieces 1b. An over-element of an oil filter that is characterized by being installed.