JP4133633B2 - Air cleaner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of an air cleaner.
[0002]
[Prior art]
Conventionally, various improved techniques have been proposed for air cleaners (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 62-87166 (Fig. 1)
[0004]
FIG. 11 is a reprint of FIG. 1 of Patent Document 1. The air cleaner (1) is a structure that holds a filter (17) in a main body (3) and is held by a lid (31). A locking part (37) is extended from the main body (3), a locking claw (39) is provided on the locking part (37), and the lid part (31) is locked by the locking claw (39).
[0005]
However, since the locking portion (37) protrudes from the main body (3), when the object hits as indicated by the arrow (1), the locking claw (39) comes off from the lid portion (31), and the lid portion (31). May come off.
[0006]
In particular, when the air cleaner (1) is used in a field tiller that mainly performs work outdoors, in the usage environment such as planting trees for cold protection on both sides of the plowing area, the air cleaner frequently hits the vegetation. 39) Deviation countermeasures are indispensable. Therefore, a countermeasure for enclosing the locking portion (37) with a U-shaped cover can be considered. An example of an air cleaner provided with a U-shaped cover will be described with reference to the following figure.
[0007]
FIG. 12 is an explanatory view of a conventional air cleaner. In the air cleaner 100, a case body 101 and an element (not shown) are set in the case body 101, and the case body 101 is covered with a cover body 102. It shows that a lock mechanism 103 that has a function of sending the air sucked from the introduction hole to the vaporizer through the element and locks the cover body 102 to the case body 101 is provided.
[0008]
The operation of this air cleaner will be described below with reference to FIGS.
13 is a cross-sectional view taken along line 13-13 in FIG. 12, and FIG. 14 is a cross-sectional view taken along line 14-14 in FIG.
[0009]
[Problems to be solved by the invention]
However, in FIG. 13, when used for a long time under severe conditions such as heavy rain with wind and rain, rainwater may enter the interior of the air cleaner 100 from the joint portion of the case body 101 and the cover body 102 through the path indicated by the arrow a. is there.
[0010]
Further, in FIG. 14, the lock claw insertion portion 104 provided on the case body 101 side of the lock mechanism 103 does not extend to the mating surface 105 between the case body 101 and the cover body 102, so severe conditions such as heavy rain accompanied by wind and rain If the air cleaner 100 is used for a long time, rainwater may enter the air cleaner 100 from the matching surface 105 of the case body 101 and the cover body 102 of the lock mechanism 103 through the path indicated by the arrow b.
[0011]
If rainwater enters the air cleaner 100, water may enter the prime mover from the air cleaner 100, and combustion failure may occur.
[0012]
Accordingly, an object of the present invention is to provide an air cleaner that is excellent in waterproofness and does not require an additional part such as packing, and that has a good cover detachability.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention provides a case body having an opening communicating with the carburetor and a hole for introducing outside air, a cover body that covers the case body, and the cover body that can swing on the case body. In an air cleaner comprising a hinge to be connected, a lock mechanism for locking the cover body to the case body, and an element interposed between the cover body and the case body, the lock mechanism includes a lock claw extending from the cover body, A vertical wall portion extending from the cover body on both sides of the lock claw, a lock claw insertion portion provided in the case body corresponding to the lock claw, and a vertical wall portion when the lock claw is inserted into the lock claw insertion portion It is composed of a reed overhanging from the lock claw insertion part so that it can be covered, and a front overhang part overhanging the mating surface of the case body and the cover body from the lock claw insertion part to the cover body side. Toss .
[0014]
The vertical wall is extended from the cover body in parallel with the lock claw, and the horizontal wall portion is projected from the lock claw insertion portion of the case body so as to cover the vertical wall portion, and this vertical wall portion and the horizontal wall portion are combined. Labyrinth structure.
Since it has a labyrinth structure composed of a vertical wall portion and a recumbent portion, it is possible to prevent rainwater from entering the air cleaner beyond the vertical wall.
[0015]
In addition, the front collar portion protruded from the lock claw insertion portion to the cover body side beyond the joining surface of the case body and the cover body.
As a result, it is possible to prevent rainwater from entering from the mating surfaces.
[0016]
By combining the vertical wall part, the horizontal part and the front part formed around the lock function, not only the rain from the top, but also the air cleaner against the rain that blows and blows from the side and the bottom side with the wind The waterproofness can be significantly improved.
[0017]
According to a second aspect of the present invention, a hook-shaped step portion for receiving and discharging rainwater flowing from the lock claw insertion portion is provided on the cover body side.
[0018]
Since the hook-shaped step portion is provided on the cover body side, rainwater dripping from the lock claw insertion portion can be received by the hook-shaped step portion, and the rainwater can be quickly discharged out of the cover body through the hook-shaped step portion.
Since the bowl-shaped step portion is provided, it is difficult for water droplets of rainwater to stay in the cover body, and rainwater from the lock mechanism can be prevented from entering the air cleaner.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a perspective view showing an example of a tiller to which the present invention is applied. The tiller 10 transmits power from a prime mover 13 to a tilling device 14 disposed below the power transmission shaft 24 via a power transmission shaft 24. It is an agricultural machine with a mechanism.
[0020]
In the figure, an operator P grips the handle frame 12 of the tiller 10 and rotates the tiller 14 with the power of the prime mover 13 mounted below the handle frame 12 inclined and extended toward the ground. Shows that the field G can be cultivated.
[0021]
The tiller 10 is in a posture inclined with respect to the surface 15 parallel to the ground surface at an inclination (90 + θ) °. However, the angle θ ° changes with the inclination of the surface 15, and the posture of the tiller 10 changes accordingly.
[0022]
FIG. 2 is a front view of the air cleaner according to the present invention. The prime mover 13 includes an air cleaner 30 attached to the front of the prime mover 13, a choke lever 21 attached to the top of the air cleaner 30, and a fuel attached to the side of the air cleaner 30. It shows that the tank 22 is provided.
The air cleaner 30 includes a case body 31, an element (not shown) set in the case body 31, and a cover body 32 that covers the case body 31.
[0023]
The case body 31 and the cover body 32 of the air cleaner 30 are fixed by the hinge mechanism 36 and the lock mechanism 33. The hinge mechanism 36 includes a pair of hinges 37 and claws 38 and is arranged at two locations. The lock mechanism 33 includes a pair of lock claw insertion portions 34 and two lock claws 39.
[0024]
That is, a hinge 37 is provided on one side 41 of the case body 31, and a lock claw insertion portion 34 is provided on a side 42 opposite to the one side 41. Corresponding to the hinge 37 and the lock claw insertion portion 34 on the case body 31 side, a claw 38 and a lock claw 39 are provided on the cover body 32 side.
[0025]
FIG. 3 is a top view of an essential part of the air cleaner according to the present invention. The lock claw 39 extends from the cover body 32, the vertical wall 43 extends from the cover body 32 on both sides of the lock claw 39, and the lock claw 39. The lock claw insertion portion 34 provided in the case body 31 corresponding to the above is a main component, and the lock claw 39 and the lock claw insertion portion 34 are fitted.
The lock claw insertion portion 34 includes a front collar portion 44 that protrudes from the lock claw insertion portion 34 to the cover body 32 side beyond the mating surface 35 of the case body 31 and the cover body 32.
[0026]
FIG. 4 is a rear view of the main part of the air cleaner according to the present invention, in which a horizontal flange 45 is extended from the lock claw insertion part 34 of the case body 31 so as to wrap up and down the vertical wall part 43 extending from the cover body 32. It shows that.
In addition, it shows that the tip of the lock claw 39 is fitted in the lock claw insertion portion 34.
[0027]
FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. Indicates that
A hook-shaped step portion 51 is provided around the base portion of the lock claw 39 on the cover body 32 side.
[0028]
FIG. 6 is an exploded perspective view of the air cleaner according to the present invention. As described above, the lock mechanism 33 includes the horizontal flange portion 45 projecting up and down from the lock claw insertion portion 34 of the case body 31 and the lock claw insertion portion. 34, a forefoot portion 44 projecting from the lock claw insertion portion 34 to the cover body 32 side beyond the mating surface of the case body 31 and the cover body 32, a lock claw 39 extending from the cover body 32, and the lock claw 39 And a vertical wall 43 extending from the cover body 32 on both sides of the cover.
46 is an element, 47 is an opening communicating with the vaporizer, and 48 is a hole for introducing outside air.
[0029]
On the cover body 32 side, a bowl-shaped step portion 51 for receiving and discharging rainwater flowing from the lock claw insertion portion 34 is provided. The bowl-shaped step portion 51 has a concave shape, and includes an upper surface portion 52 through which rainwater flows, left and right vertical wall surface portions 53 and 54, and a deep vertical wall surface portion 55.
[0030]
Since the hook-shaped step portion 51 is provided on the cover body 32 side, rain water flowing from the front hook portion 44 of the lock claw insertion portion 33 is received by the upper surface portion 52 of the hook-shaped step portion 51, The wall surface portion 55 can secure a sealing surface against rainwater, and the rainwater can be quickly discharged to the outside of the cover body 32 through the upper surface 52 of the bowl-shaped step portion 51.
Since the bowl-shaped step portion 51 is provided, the sealing performance against rainwater is improved, and rainwater droplets are less likely to stay in the cover body 32, and rainwater from the lock mechanism 33 can be prevented from entering the air cleaner 30.
[0031]
FIG. 7 is an explanatory view of an air cleaner at the time of air intake. Air taken in from the outside air introduction hole 48 is filtered through the element 46 and can enter the vaporizer through the opening 47 provided in the case body 31.
[0032]
FIG. 8 is an explanatory view showing the waterproof function of the air cleaner during raining. The case body 31 is covered with the cover body 32 and the case body 31 and the cover body 32 are locked by the hinge mechanism and the lock mechanism 33 (not shown). Show.
[0033]
As described above, the lock mechanism 33 includes the lock claw 39 (see FIG. 6), the vertical wall portion 43 extending on both sides of the lock claw 39, the lock claw insertion portion 34, and the lock claw insertion portion 34 with the lock claw. The horizontal flange portion 45 that protrudes from the lock claw insertion portion 34 so as to cover the vertical wall portion 43 when the 39 is inserted, and the front flange portion that protrudes toward the cover body 32 beyond the mating surface of the case body and the cover body 44.
[0034]
A labyrinth structure in which a vertical wall portion 43 (see FIG. 6) extends from the cover body 32 in parallel with the lock claw 39 and is combined with a horizontal flange portion 45 that projects from the lock claw insertion portion 34 and covers the vertical wall portion 43. .
As a result, rainwater can be prevented from entering the air cleaner 30 beyond the vertical wall portion 43.
[0035]
In addition, the front collar portion 44 is configured to project from the lock claw insertion portion 34 to the cover body 32 side beyond the mating surface of the case body 31 and the cover body 32.
As a result, it is possible to prevent rainwater from entering from the mating surfaces.
[0036]
Further, since the bowl-shaped step portion 51 is provided on the cover body 32 side, a seal surface against rainwater is secured at the back vertical wall portion 55 (see FIG. 6) of the bowl-shaped step portion 51 and the front of the lock claw insertion portion 33 is secured. Rainwater that flows down from the eaves portion 44 or the like is received by the upper surface portion 52 of the eaves-shaped step portion 51, and rainwater can be quickly discharged out of the cover body 32 through the upper surface portion 52.
As a result, the sealing performance against rainwater is improved, and rainwater droplets are less likely to stay on the cover body 32, and rainwater from the lock mechanism 33 can be prevented from entering the air cleaner 30.
[0037]
By combining the vertical wall portion 43, the recumbent portion 45, and the front reed portion 44 formed around the lock mechanism 33, not only the rain from above, but also the horizontal direction and the bottom with the wind. The waterproofness against the rain blown from the side can be remarkably improved. Since the rain water on the cover body 32 is quickly discharged by the bowl-shaped step portion 51, the possibility of rain water entering the air cleaner 30 can be further reduced.
[0038]
Of course, since the position of the tiller 10 including the prime mover 13 including the air cleaner 30 changes every moment depending on the working environment, it is essential to ensure the waterproofness of the air cleaner 30 against spraying rain from all directions. According to the invention, sufficient waterproof performance can be ensured.
[0039]
A claw formed on the cover body 32 corresponding to the hinge 37 formed on the case body 31 is inserted, and then a lock claw 39 of the cover body 32 is inserted and fixed to a lock claw insertion portion 34 of the case body 31 formed on the opposite side. By doing so, it is also possible to ensure good detachability of the cover body 32.
[0040]
9 is a cross-sectional view taken along line 9-9 of FIG. 8, and the waterproof structure around the lock mechanism 33 includes a vertical wall portion 43 extending from the cover body 32, and a horizontal flange portion 45 protruding from the lock claw insertion portion 34. Labyrinth structure consisting of
[0041]
Even if it is used for a long time under severe conditions such as heavy rain with wind and rain, the labyrinth structure combines the vertical wall portion 43 and the recumbent portion 45. The possibility of reaching the insertion portion 34 can be greatly reduced.
As a result, rainwater can be prevented from entering the air cleaner 30.
[0042]
FIG. 10 is a cross-sectional view taken along the line 10-10 in FIG.
The front hook portion so that the lock claw insertion portion 34 provided on the case body 31 side of the lock mechanism 33 protrudes from the lock claw insertion portion 34 to the cover body 32 side beyond the mating surface 35 of the case body 31 and the cover body 32. 44 was extended.
[0043]
Even if it is used for a long time under severe conditions such as torrential rain accompanied by wind and rain, for example, the rainwater that has passed through the path indicated by the arrow b is protected by the forehead portion 44. The possibility of reaching 35 can be greatly reduced.
As a result, rainwater can be prevented from entering the air cleaner 30.
[0044]
Depending on the required capacity and size of the air cleaner 30 (see FIG. 6), the length and height of the vertical wall portion 43 of the lock mechanism 33, the length of the front flange portion 44, and the length of the horizontal flange portion 45 are extended. A predetermined waterproof performance can be obtained by appropriately increasing or decreasing the thickness.
[0045]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
The first aspect of the present invention is a labyrinth structure in which a vertical wall portion is extended from the cover body in parallel with the lock claw and is combined with a horizontal flange portion that extends from the lock claw insertion portion and covers the vertical wall portion.
As a result, rainwater can be prevented from entering the air cleaner beyond the vertical wall.
[0046]
Further, the front collar portion is projected from the lock claw insertion portion to the cover body side beyond the joining surface of the case body and the cover body.
As a result, it is possible to prevent rainwater from entering from the mating surfaces.
[0047]
According to the second aspect of the present invention, since the hook-shaped step portion for receiving and discharging the rainwater flowing from the lock claw insertion portion is provided on the cover body side, the rainwater can be quickly discharged to the outside of the cover body through the hook-shaped step portion. .
As a result, the rain water on the cover body easily flows down to the outside, and the possibility of rain water entering the air cleaner can be further reduced.
[0048]
By combining the vertical wall part, the horizontal part and the front part formed around the lock function, not only the rain from the top, but also the waterproof against the rain that blows and blows from the side and from the bottom. The sex can be greatly improved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a tiller to which the present invention is applied. FIG. 2 is a front view of an air cleaner according to the present invention. FIG. 3 is a top view of a main part of the air cleaner according to the present invention. FIG. 5 is a sectional view taken along line 5-5 of FIG. 2. FIG. 6 is an exploded perspective view of the air cleaner according to the present invention. FIG. 7 is an explanatory view of the air cleaner when taking air. FIG. 9 is a sectional view taken along line 9-9 in FIG. 8. FIG. 10 is a sectional view taken along line 10-10 in FIG. 8. FIG. 11 is a reprint of FIG. 12 is an explanatory view of a conventional air cleaner. FIG. 13 is a sectional view taken along line 13-13 in FIG. 12. FIG. 14 is a sectional view taken along line 14-14 in FIG.
DESCRIPTION OF SYMBOLS 30 ... Air cleaner, 31 ... Case body, 32 ... Cover body, 33 ... Lock mechanism, 34 ... Lock claw insertion part, 35 ... Matching surface, 39 ... Lock claw, 43 ... Vertical wall part, 44 ... Front collar part, 45 ... Recumbent part, 51.

Claims (2)

A case body provided with an opening communicating with the vaporizer and a hole for introducing outside air, a cover body covering the case body, a hinge for swingably connecting the cover body to the case body, and the cover body as the case body In an air cleaner comprising a locking mechanism that locks to the element and an element interposed between the cover body and the case body,
The lock mechanism includes a lock claw extending from the cover body, a vertical wall portion extending from the cover body on both sides of the lock claw, a lock claw insertion portion provided in the case body corresponding to the lock claw, When the lock claw is inserted into the lock claw insertion part, the lateral wall part protruding from the lock claw insertion part so that it can be covered with the vertical wall part, and the mating surface between the case body and the cover body An air cleaner comprising: a front flange portion projecting from the lock claw insertion portion to the cover body side. The air cleaner according to claim 1, wherein a hook-shaped step portion for receiving and discharging rainwater flowing from the lock claw insertion portion is provided on the cover body side.

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