JP2021169774A - Air cleaner - Google Patents

Abstract

To provide an air cleaner that can suppress erroneous assembly of a functional sheet.SOLUTION: An air cleaner includes: an adsorption sheet 60 including a body part 61 and an insertion marginal part 62 and an assembling marginal part 63 which continue to the body part 61; and a cap 30 including a groove part 46 into which the insertion marginal part 62 is inserted to position the adsorption sheet 60, an assembling part to which the assembling marginal part 63 is assembled and a regulating part 43a installed in a gap G to regulate displacement of the body part 61 toward an inner wall.SELECTED DRAWING: Figure 6

Description

The present invention relates to an air cleaner.

Conventionally, an air cleaner of an internal combustion engine includes a case having an inlet in which intake air flows in, a cap having an outlet in which intake air flows out, and a filter element provided between the case and the cap (for example, Patent Document 1). reference).

Inside the air cleaner described in Patent Document 1, an adsorption sheet for adsorbing the evaporated fuel of the internal combustion engine flowing into the cap through the outlet is provided. This suction sheet is inserted and assembled in the groove provided on the inner wall of the cap.

JP-A-2017-133364

By the way, in such an air cleaner, it is preferable that the width of the groove is small in order to stabilize the assembling posture of the functional sheet such as the suction sheet. However, in this case, it may be difficult to form the groove, or it may be difficult to insert the functional sheet into the groove.

On the other hand, when the width of the groove is set large, in the work of inserting the functional sheet into the groove, the operator inserts and assembles the plurality of functional sheets into the groove while overlapping each other, which is a so-called error. Assembly may occur.

An object of the present invention is to provide an air cleaner capable of suppressing misassembly of a functional sheet.

The air cleaner for achieving the above object is assembled facing the inner wall with a gap between the housing having the inlet and the outlet, the filter element housed in the housing, and the inner wall of the housing. It is equipped with a functional sheet. The functional sheet has a main body portion, an insertion edge portion connected to the main body portion, and an assembly edge portion, and the housing positions the functional sheet by inserting the insertion edge portion. It has a groove portion to be assembled, an assembling portion to which the assembling edge portion is assembled, and a regulating portion provided in the gap and restricting the displacement of the main body portion toward the inner wall.

According to the same configuration, while the plurality of functional sheets are overlapped with each other and the insertion edges of the functional sheets are inserted into the grooves, the assembling edges of the functional sheets are used as the assembling portions. When attempted to assemble, the displacement of the main body of the first functional sheet closest to the inner wall of the housing towards the inner wall is restricted. Therefore, the other functional sheets that overlap the first functional sheet are separated from the assembly portion. This makes it easier for the operator to notice the misassembly of the functional sheet.

Further, since the regulating portion is provided in the gap between the functional sheet and the inner wall, when the insertion edge portion of the functional sheet is inserted into the groove portion, another functional sheet overlaps with the inner wall side of the functional sheet. If so, other functional sheets will interfere with the regulation part when inserting these functional sheets. This makes it easier for the operator to notice the misassembly of the functional sheet.

From the above, it is possible to suppress erroneous assembly of the functional sheet.

The perspective view of the air cleaner of one embodiment. Sectional drawing of the air cleaner of the same embodiment. A perspective view of the cap of the same embodiment as viewed from the opening side. A plan view of the cap of the same embodiment as viewed from the opening side. FIG. 4 is a cross-sectional view taken along the line 5-5 of FIG. FIG. 4 is a cross-sectional view taken along the line 6-6 of FIG. It is a figure explaining the operation of the same embodiment, and is the cross-sectional view which shows the state which a plurality of suction sheets are about to be inserted into a groove part.

Hereinafter, an embodiment of the air cleaner will be described with reference to FIGS. 1 to 7.
The air cleaner 10 of the present embodiment is provided in the intake passage of the in-vehicle internal combustion engine and filters the intake air.

As shown in FIGS. 1 and 2, the air cleaner 10 includes a housing 11 having an inlet 25 into which the intake air flows in and an outlet 35 in which the intake air flows out, and a filter element 50 housed in the housing 11. Inside the housing 11, a suction sheet 60 for adsorbing the evaporated fuel flowing into the housing 11 through the outlet 35 is provided.

The housing 11 includes a case 20 having an opening 21 and a cap 30 having an opening 31. The opening 21 of the case 20 and the opening 31 of the cap 30 face each other. The cap 30 is detachably provided with respect to the case 20. Both the case 20 and the cap 30 are formed of a composite material obtained by adding a filler such as talc or glass fiber to a resin material such as polypropylene.

The filter element 50 is provided between the opening 21 of the case 20 and the opening 31 of the cap 30.
Next, each configuration of the air cleaner 10 will be described in detail.

First, the adsorption sheet 60 will be described.
<Adsorption sheet 60>
As shown in FIG. 2, the suction sheet 60 has a main body portion 61, an insertion edge portion 62 connected to the main body portion 61, and an assembly edge portion 63. The suction sheet 60 has a rectangular shape having a long side and a short side.

The main body 61 has a rectangular shape that is one size smaller than the entire suction sheet 60.
The insertion edge portion 62 and the assembly edge portion 63 form a long side of the suction sheet 60, and are provided on opposite sides of the main body portion 61 with the main body portion 61 interposed therebetween. The insertion edge 62 and the assembly edge 63 extend along the inner edge of the opening 31 of the cap 30. The insertion edge portion 62 is provided at a position farther from the opening 31 of the cap 30 than the main body portion 61, and the assembly edge portion 63 is provided at a position closer to the opening 31 of the cap 30 than the main body portion 61. ..

Both ends of the insertion edge 62 and the assembly edge 63 are connected by a pair of vertical edges 64. The pair of vertical edge portions 64 form the short sides of the suction sheet 60.
Hereinafter, the direction in which the insertion edge portion 62 extends is referred to as an extension direction X. The extending direction X is the left-right direction in FIG.

As shown in FIG. 5, the suction sheet 60 is assembled by being joined to the inner surface of the peripheral wall 32 surrounding the opening 31 of the cap 30 by welding. Hereinafter, among the peripheral walls 32, the peripheral wall 32 to which the suction sheet 60 is assembled will be referred to as a peripheral wall 32a.

The suction sheet 60 of the present embodiment is assembled so as to face the general surface 32b of the peripheral wall 32a with a gap G between the main body 61 and the peripheral wall 32a. The peripheral wall 32a is an example of an inner wall.

Although not shown, the main body 61 has, for example, an adsorbent made of granular activated carbon. The adsorption sheet 60 has a pair of holding sheets that sandwich the adsorbent and a pair of resin nets that sandwich the pair of holding sheets. The holding sheet is made of, for example, a non-woven fabric. The resin net is made of a resin material such as polypropylene, for example. The peripheral edge portion between each holding sheet and each resin net is heat-pressed over the entire circumference to form an insertion edge portion 62, an assembly edge portion 63, and a pair of vertical edge portions 64.

<Case 20>
As shown in FIGS. 1 and 2, the case 20 has a peripheral wall 22 surrounding the opening 21, a bottom wall 23 facing the opening 21, and an inlet 25.

The inlet 25 has a cylindrical shape and projects from the outer peripheral surface of the peripheral wall 22. The inlet 25 extends toward one side of the extending direction X.
On the peripheral edge of the opening 21, an annular flange 24 projecting toward the outer peripheral side is formed over the entire circumference.

<Cap 30>
As shown in FIGS. 1 and 2, the cap 30 has a peripheral wall 32 surrounding the opening 31, a top wall 33 facing the opening 31, and an outlet 35.

The outlet 35 has a cylindrical shape and projects from the outer peripheral surface of the peripheral wall 32. The outlet 35 is located on the side opposite to the inlet 25 in the extending direction X, and extends so as to be inclined with respect to the extending direction X.

An annular flange 34 protruding toward the outer peripheral side is formed on the peripheral edge of the opening 31.
As shown in FIGS. 3 and 4, a plurality of ribs 40 projecting toward the opening 31 are provided on the portion of the top wall 33 adjacent to the peripheral wall 32a at intervals in the extending direction X. .. The rib 40 has a plate shape. Each rib 40 is provided so as to be connected to the top wall 33 and the peripheral wall 32a. The rib 40 includes a first rib 41, a second rib 42 located outside the extending direction X from the first rib 41, and a third rib 43 located outside the extending direction X from the second rib 42. It is configured to include. Note that the suction sheet 60 is not shown in FIGS. 3 and 4.

The first rib 41 is provided at the central portion of the top wall 33 in the extending direction X. In this embodiment, a pair of first ribs 41 are provided at intervals in the extending direction X.
The ends of each of the first ribs 41 on the opposite side of the peripheral wall 32a are connected by a first joint portion 36 extending in the extending direction X.

As shown in FIG. 5, the insertion edge portion 62 of the suction sheet 60 is joined to the first joint portion 36. The first joint portion 36 projects from the top wall 33 at a position away from the peripheral wall 32a. The first joint portion 36 is inclined with respect to the general surface 32b so as to be located inside the cap 30 as the distance from the opening 31 increases.

As shown in FIGS. 3 and 4, an auxiliary rib 41a protrudes toward the opening 31 in a portion of the top wall 33 between the first ribs 41. The auxiliary rib 41a has a plate shape. The auxiliary rib 41a is provided so as to be connected to the first joint portion 36 and the peripheral wall 32a. The tip of the auxiliary rib 41a is located closer to the opening 31 than the first joint portion 36. The tip of the auxiliary rib 41a is inclined with respect to the general surface 32b so as to be located inside the cap 30 as the distance from the opening 31 increases.

The second ribs 42 are provided on both sides of the first rib 41 in the extending direction X, respectively. In the present embodiment, three second ribs 42 are provided on both sides of the first rib 41 in the extending direction X.

The third rib 43 is provided on the outer side of the outermost second rib 42 in the extending direction X, respectively. A regulating portion 43a is integrally provided at the tip of the third rib 43. Therefore, a plurality of regulating units 43a are provided at intervals in the extending direction X. In this embodiment, two regulation units 43a are provided for convenience. Since each rib 40 is provided in the gap G, the regulating portion 43a is provided in the gap G.

As shown in FIG. 6, the regulating portion 43a regulates the displacement of the main body portion 61 of the suction sheet 60 toward the peripheral wall 32a. In the present embodiment, the regulating portion 43a is in contact with the main body portion 61 of the suction sheet 60 assembled to the peripheral wall 32a. The tip surface of the regulating portion 43a is substantially orthogonal to the general surface 32b.

As shown in FIGS. 3 and 4, a pair of lateral ribs 44 extending along the extending direction X are spaced apart from each other in the extending direction X in the portion of the top wall 33 inside the cap 30 with respect to each rib 40. It is provided at the same time. Each lateral rib 44 is provided so as to face the third rib 43, the second rib 42 adjacent to the third rib 43, and the second rib 42 adjacent to the second rib 42.

Vertical ribs 45 are provided in a row at the outer end of each horizontal rib 44 in the extending direction X. Each vertical rib 45 extends from the top wall 33 toward the opening 31 side along the peripheral wall 32a. The vertical rib 45 is connected to the peripheral wall 32 which is connected to the peripheral wall 32a among the peripheral walls 32. The vertical rib 45 faces the vertical edge portion 64 of the suction sheet 60.

As shown in FIGS. 4 and 6, a groove 46 is provided between each rib 40 and the lateral rib 44. More specifically, the groove 46 is provided between each of the second ribs 42 facing the lateral ribs 44 and between the third ribs 43. The bottom of the groove 46 is located closer to the opening 31 than the top wall 33. In the present embodiment, the groove portion 46 and the regulation portion 43a are configured by a common third rib 43.

As shown in FIGS. 3 to 5, a plurality of second joints 37 are provided in the vicinity of the opening 31 of the peripheral wall 32a at intervals in the extending direction X. In this embodiment, three second joints 37 are provided at equal intervals in the extending direction X. The assembly edge portion 63 of the suction sheet 60 is joined to the second joint portion 37. The second joint portion 37 is inclined with respect to the general surface 32b so as to be located inside the cap 30 as the distance from the opening 31 increases. The first joint portion 36 and the second joint portion 37 are located on the same plane. The second joint portion 37 is an example of an assembling portion.

The second joint portion 37 outside the extending direction X and the third rib 43 are provided at the same positions in the extending direction X. The second joint portion 37 and the first joint portion 36 at the center of the extension direction X are provided at the same positions in the extension direction X.

A plurality of support ribs 47 are provided between the second joints 37 of the peripheral walls 32a at intervals in the extending direction X. Four support ribs 47 are provided between the two second joints 37 adjacent to each other.

In a state where the suction sheet 60 is joined to the first joint portion 36 and the second joint portion 37, the insertion edge portion 62 is in contact with each of the second rib 42 and each third rib 43. Further, the assembling edge portion 63 is in contact with each support rib 47. Further, as described above, since the first joint portion 36 and the second joint portion 37 are inclined with respect to the general surface 32b of the peripheral wall 32a, the suction sheet 60 is in a state of being inclined with respect to the general surface 32b. It is assembled to the peripheral wall 32a.

<Filter element 50>
As shown in FIG. 2, the filter element 50 comprises a filter portion 51 formed by folding a filter medium sheet such as a filter paper or a non-woven fabric, and an annular seal portion 52 provided on the outer peripheral edge of the filter portion 51. Have. The filter element 50 has a rectangular shape in a plan view.

The seal portion 52 is sandwiched between the flange 24 of the case 20 and the flange 34 of the cap 30. As a result, the space between the case 20 and the cap 30 is sealed.
Next, a method of assembling the suction sheet 60 will be described.

First, the insertion edge 62 of the suction sheet 60 is inserted into the groove 46 through the opening 31. As a result, the suction sheet 60 is positioned.
Next, the insertion edge portion 62 is aligned with the first joint portion 36, and the assembly edge portion 63 is aligned with the second joint portion 37. As a result, the suction sheet 60 is arranged in an inclined posture with respect to the general surface 32b of the peripheral wall 32a.

Next, the insertion edge portion 62 and the first joint portion 36 are welded by a welding tool (not shown), and the assembly edge portion 63 and each of the second joint portions 37 are welded.
In this way, the suction sheet 60 is assembled facing the peripheral wall 32a with a gap G between the suction sheet 60 and the peripheral wall 32a of the cap 30.

The operation of this embodiment will be described.
With the plurality of suction sheets 60 overlapping each other and the insertion edge 62 of the suction sheets 60 being inserted into the groove 46, the assembling edge 63 of these suction sheets 60 is assembled to the second joint 37. At this time, the displacement of the main body 61 toward the peripheral wall 32a of the first suction sheet 60 closest to the peripheral wall 32a is restricted. Therefore, the other suction sheet 60 that overlaps with the first suction sheet 60 is separated from the second joint portion 37. This makes it easier for the operator to notice the incorrect assembly of the suction sheet 60.

Further, as shown in FIG. 7, since the regulating portion 43a is provided in the gap G between the suction sheet 60 and the peripheral wall 32a, the suction sheet 60 is inserted when the insertion edge portion 62 of the suction sheet 60 is inserted into the groove portion 46. When the other suction sheets 60 overlap with each other on the peripheral wall 32a side of the above, the other suction sheets 60 interfere with the regulation portion 43a when the suction sheets 60 are inserted. This makes it easier for the operator to notice the incorrect assembly of the suction sheet 60.

The effect of this embodiment will be described.
(1) The suction sheet 60 has a main body portion 61, an insertion edge portion 62 connected to the main body portion 61, and an assembly edge portion 63. The cap 30 is provided in the gap G between the groove 46 for positioning the suction sheet 60 by inserting the insertion edge 62, the second joint 37 to which the assembly edge 63 is assembled, and the peripheral wall of the main body 61. It has a regulation unit 43a that regulates the displacement toward 32a.

According to such a configuration, since the above-mentioned action is obtained, it is possible to suppress erroneous assembly of the suction sheet 60.
(2) A plurality of regulation units 43a are provided at intervals in the extending direction X.

According to such a configuration, since the gap G is formed between the plurality of regulating portions 43a, the surface area of the portion of the main body portion 61 of the suction sheet 60 that does not face the regulating portion 43a can be increased. Therefore, the evaporated fuel existing in the gap G between the adsorption sheet 60 and the peripheral wall 32a is easily adsorbed by the main body 61.

Further, since a plurality of regulating portions 43a are provided, the displacement of the main body portion 61 toward the peripheral wall 32a is regulated in a wider range.
From the above, it is possible to suppress the deterioration of the performance of the suction sheet 60 by providing the regulation portion 43a and to suppress the misassembly of the suction sheet 60 at the same time.

(3) The assembling edge portion 63 is provided on the side opposite to the insertion edge portion 62 with the main body portion 61 interposed therebetween.
The plurality of suction sheets 60 in which the insertion edge 62 is inserted into the groove 46 in a state of being overlapped with each other are more likely to be separated from each other as the portion is farther from the insertion edge 62.

According to the above configuration, since the assembling edge portion 63 is provided on the side opposite to the insertion edge portion 62 with the main body portion 61 interposed therebetween, the assembling edge portions 63 of the plurality of suction sheets 60 are easily separated from each other. .. Therefore, it becomes difficult to assemble the assembling edge portions 63 of the plurality of suction sheets 60 to the second joint portion 37. This makes it easier for the operator to notice the misassembly of the suction sheet 60.

(4) The groove portion 46 and the regulation portion 43a are formed of a common third rib 43.
For example, when the regulating portion 43a and the groove portion 46 are individually provided, the structure of the mold for molding the cap 30 may be complicated, for example, a slide mold for forming the regulating portion 43a is required separately. ..

In this respect, according to the above configuration, since the groove portion 46 and the regulation portion 43a are formed of the common third rib 43, the above-mentioned inconvenience is less likely to occur, and the regulation portion 43a can be easily formed.

<Change example>
This embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

-In the present embodiment, two regulation portions 43a are provided in the cap 30, but the number of regulation portions 43a may be one or three or more. In this case, the regulating portion 43a may be provided at the tip of the first rib 41 or at the tip of the second rib 42.

A regulating portion 43a can be provided at the tip of the auxiliary rib 41a.
-The regulation portion 43a and the groove portion 46 of the present embodiment are configured by a common third rib 43, but the regulation portion 43a and the groove portion 46 may be provided separately. At this time, the regulating portion 43a may protrude from the top wall 33.

-The vertical edge portion 64 of the suction sheet 60 can also be configured as the assembling edge portion 63. That is, the vertical edge portion 64 may be assembled to the peripheral wall 32a.
-The position of the regulation unit 43a can be changed as appropriate. For example, it may be provided in a portion of the peripheral wall 32a facing the vicinity of the assembling edge portion 63 of the main body portion 61.

The tip surface of the regulating portion 43a may be inclined so as to be located inside the cap 30 as the distance from the opening 31 is increased, or may be inclined so as to be located outside the cap 30 as the distance from the opening 31 is increased. good.

The suction sheet 60 does not have to be joined to the peripheral wall 32a. For example, it may be assembled by inserting it into a groove provided in the top wall 33.
The insertion edge 62 of the suction sheet 60 assembled to the peripheral wall 32a does not have to be located inside the groove 46.

The regulating portion 43a does not have to be in contact with the main body portion 61 of the suction sheet 60 assembled to the peripheral wall 32a. That is, a gap may be provided between the regulating portion 43a and the main body portion 61.

-The present invention can also be applied to an air cleaner of an internal combustion engine provided with a sound absorbing sheet made of a non-woven fabric as a functional sheet. In this case, the sound absorbing sheet may be assembled in the case 20 or in the cap 30.

G ... Gap 10 ... Air cleaner 11 ... Housing 20 ... Case 25 ... Inlet 30 ... Cap 35 ... Outlet 32 ... Peripheral wall 32a ... Peripheral wall 43 ... Third rib 43a ... Regulatory part 46 ... Groove 50 ... Filter element 60 ... Adsorption sheet 61 ... Main body Part 62 ... Insertion edge 63 ... Assembled edge

Claims (5)

An air cleaner including a housing having inlets and outlets, a filter element housed in the housing, and a functional sheet assembled facing the inner wall with a gap between the inner wall of the housing. And
The functional sheet has a main body portion, an insertion edge portion connected to the main body portion, and an assembly edge portion.
The housing is
A groove for positioning the functional sheet by inserting the insertion edge, and a groove for positioning the functional sheet.
The assembly part to which the assembly edge part is assembled and
It has a regulating portion provided in the gap and regulating the displacement of the main body portion toward the inner wall.
Air cleaner. The functional sheet is an adsorption sheet that adsorbs the evaporated fuel of the internal combustion engine that flows into the housing through the outlet.
The air cleaner according to claim 1. A plurality of the restricting portions are provided at intervals in the extending direction of the insertion edge portion.
The air cleaner according to claim 1 or 2. The assembly edge portion is provided on the side opposite to the insertion edge portion with the main body portion interposed therebetween.
The air cleaner according to any one of claims 1 to 3. The groove portion and the regulation portion are formed of a common rib.
The air cleaner according to any one of claims 1 to 4.

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