JPH0141894Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an air cleaner that is attached to the intake system of an engine and used to remove dust floating in the air.

(Prior art) Conventionally, box-type air cleaners have been equipped with a filter paper made of meander-folded paper between the air intake port and the purified air outlet in the air cleaner housing, as described in Japanese Utility Model Application Publication No. 55-14083. Air cleaners with intervening elements are known.

However, in the above-mentioned air cleaner, since the element is simply formed in a meandering manner, a sealing surface is formed at both end portions of the element.
It is necessary to adhere the sealing surface of the direction to the sealing member using adhesive, and this sealing process inevitably requires two steps.
Since it is a process, there was a problem in that the number of manufacturing steps could not be reduced.

In addition, dimension control of the element pitch is required when manufacturing the element, which has the problem of complicating the manufacturing process.

(Purpose of the invention) This invention allows the element sealing surface to be oriented in one direction while having the same filtration area, making the process for the element sealing surface a single process, and reducing the number of manufacturing steps. The purpose of the present invention is to provide an air cleaner that can automatically ensure element pitch.

(Structure of the device) In this device, at both ends of a meander-folded element in the direction of the fold line, one end of the element is directed toward the other end, and the other end is directed toward the other end. A valley fold is made using the mountain fold side fold line as a crease, and the mountain fold side fold line length is set shorter than the valley fold side fold line length of the element, and
Located on the valley fold side above, V between the fold lines on the valley fold side
The air cleaner is characterized in that both end portions in the direction of the fold line forming the letter shape are set to be flush with the fold on the valley fold side, and the same flat portion on the valley fold side is configured as a sealing surface. do.

(Effect of the invention) According to this invention, since both ends of the element described above are valley-folded in the same direction, the sealing surface of the element can necessarily be in one direction, and as a result, the element seal Since the surface sealing process is a single process of sealing only one direction, it is possible to reduce the number of manufacturing steps.

Moreover, since the filtration area does not decrease in any way, the purification ability of the air cleaner is the same as that of the conventional one.
Also, by valley-folding the element, the projected area of the element can be reduced.
Accordingly, the air cleaner can be made smaller and more compact.

Further, by valley-folding both ends of the element, the element pitch can be automatically ensured, so there is no need to manage the dimensions of the element pitch as in the past.

(Example) An example of this invention will be described in detail below based on the drawings.

The drawing shows an air cleaner, and in FIG.
1 is a housing, and this housing 1 is an intake port 2
It consists of a first housing 3 having a clean air outlet 4, and a second housing 5 having a purified air outlet 4, and is formed by fitting the other second housing 5 into a rectangular opening 6 of one first housing 3. There is.

Between the above-mentioned intake port 2 and purified air outlet 4, there is a second
A rectangular element 8 held in a sealing frame 7 made of urethane as shown in FIGS. 3 to 3 is interposed.

Here, the above-mentioned seal frame 7 is connected to the first housing 3.
It is held between the stepped portion 6a of the opening 6 and the inner wall surface of the second housing 5.

As shown in FIG. 4, the above-mentioned element 8 is used when folding a filter paper with V-shaped folds 9 formed in advance on both ends 8c (for convenience of illustration, only one end is shown in FIG. 4). At the same time as this bending process, both ends are formed along the above-mentioned fold line 9 as shown in FIG.

That is, at both ends 8c of the element 8 in the fold line direction, one end thereof is directed toward the other end, and the other end is directed toward the one end of the mountain fold side fold 8d of the element 8. A valley fold is made using a line as a fold, and the line length of this mountain fold side fold 8d is set shorter than the line length of the valley fold side fold 8e of the element, and the line length of the mountain fold side fold 8d is set to be shorter than the line length of the valley fold side fold 8e of the element. The above-mentioned both ends 8c in the fold line direction forming a V-shape between the lines of the side fold 8e are set to be on the same plane as the above-mentioned valley fold side fold 8e, and the above-mentioned same plane on the valley fold side. A portion is formed on the sealing surface 8a.

When formed in this way, the above-mentioned seal surfaces 8a, 8a are attached only in one direction with adhesive to the horizontally long seal parts 7a, 7a integrally formed on the above-mentioned seal frame 7 so as to face the seal surfaces 8a, 8a. It can be glued from

In addition, as shown in FIG.
8b (first tongue pieces 7b, 7b that hold the portions corresponding to the folds 9, 9 in FIG. 5; second tongue pieces 7c that hold both sides of the element 8 as shown in FIG. 3;
7c are each integrally formed, and the above-mentioned element 8
These tongue pieces 7b, 7c and the aforementioned seal portion 7a
It is held with.

Furthermore, the left end surfaces of ribs 3a, 3a formed integrally with the first housing 3 are brought into contact with the right end surface of the element 8 in FIG.
The right side surface of the above-mentioned element 8 is supported by these ribs 3a, 3a.

By the way, the above-mentioned first housing 3 includes a first
As shown in the figure, a valve seat 10 whose bottom part is curved toward the inside of the housing 3 is integrally formed, and a plurality of holes 11 are bored in the valve seat 10 to communicate the inside and outside of the housing 3. An unloader valve 12 made of rubber or flexible synthetic resin is attached to the central hole of the valve seat 10. The unloader valve 12 opens when the negative pressure inside the housing 1 is generated due to the process of a 4-stroke engine, and when the intake pulse pulsates. By opening the above-mentioned unloader valve 12 by displacing it due to its flexibility, the moisture contained in the intake air is removed to the outside of the air cleaner.

Next, the operation of the air cleaner configured as described above will be explained.

Now, the air sucked into the housing 1 from the intake port 2 as shown by the arrow in FIG.
After passing through the clean air outlet 4, the air is supplied to the intake system (not shown) as shown by the arrow in the figure.

Then, when the air passes through element 8,
Dust contained in the air is removed by the same element 8, and only purified air is supplied to the intake system from the above-mentioned purified air outlet 4.

By the way, since the above-mentioned element 8 is formed by valley-folding both ends thereof in the same direction, the sealing surfaces 8a, 8a of the element 8 are both in the same direction.
Therefore, the sealing process of the seal surfaces 8a, 8a is a single process of sealing from only one direction.
As a result, the number of manufacturing steps can be significantly reduced compared to the conventional two-way sealing process.

Moreover, since the filtration area does not decrease in any way, the purification capacity of the air cleaner is the same as that of conventional air cleaners.Furthermore, by folding the element 8, the projected area of the element 8 can be reduced. The air cleaner can be made smaller accordingly.

In addition, by valley-folding both ends of the element 8, the element pitch can be automatically ensured by the folded filter paper, making it unnecessary to manage the dimensions of the element pitch as in the past.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, in which Fig. 1 is a sectional view of the air cleaner, Fig. 2 is a front view of the main parts of the air cleaner, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4 is a sectional view of the air cleaner. 5 is a partial perspective view showing an intermediate stage of the bending process of the element, and FIG. 5 is a partial perspective view of the element. 7... Seal frame, 8... Element.

Claims (1)

[Claims for Utility Model Registration] An air cleaner that seals the periphery of an element that is folded into a rectangular shape, comprising:
One end of the element is folded in the direction of the other end, and the other end is folded in the direction of the other end. The length of the fold line on the mountain fold side of the lever is set short, and both edges in the direction of the fold line, which are located on the valley fold side and form a V-shape between the valley fold side fold lines, are on the same plane as the valley fold side fold. An air cleaner configured to have the same flat surface on the valley fold side as a sealing surface.