JP4493509B2 - Air cleaner - Google Patents

Description

  The present invention relates to an air cleaner configured by inserting a filter element into a filter arrangement space formed inside a case.

  For example, an air cleaner is provided in an intake system of a vehicle engine. The air cleaner is configured by mounting a filter element including a filter medium on a case in which a filter disposition space is formed, and the air taken into the case is filtered. Is filtered and cleaned, and the purified air is discharged out of the case and supplied to the engine or the like. The case is provided with an inlet opening for taking in air and an outlet opening for discharging purified air, and the filter element has an inlet side space where the inlet opening communicates with the filter arrangement space and an outlet side where the outlet opening communicates. It is mounted so as to partition it into a space. Such an air cleaner requires that the filter element be mounted so that the air taken in by completely partitioning the inlet side space and the outlet side space is allowed to pass through the filter element.

In general, the air cleaner requires periodic replacement of the filter element. For this reason, the filter element is configured to be detachable with respect to the case, and the filter element can be attached / detached / replaced through an attachment opening appropriately provided in the case (for example, Patent Document 1).
JP 2003-336551 A

  Parts and equipment mounted on a vehicle such as an air cleaner are required to be small and light. For this reason, size reduction of the case which forms the outline of an air cleaner is calculated | required. On the other hand, since the function of purifying air as an air cleaner needs to be maintained, the filter element needs to secure the surface area of the filter medium. Under such circumstances, there is a problem that it is difficult to detachably attach a filter element having a surface area of a filter medium similar to that of a conventional case to a case that is reduced in size and has a reduced area of the mounting opening.

  In view of such problems, an object of the present invention is to provide an air cleaner in which a filter element can be easily mounted in a filter arrangement space of a downsized case.

  In order to achieve the above object, an air cleaner according to the present invention has a case main body having a mounting opening that communicates with the filter mounting space by forming a filter mounting space therein, and is detachably attached to the case main body covering the mounting opening. A case in which one of an inlet opening and an outlet opening communicating with the filter installation space is provided in the case main body, and the other of the inlet and outlet openings is provided in either the case main body or the cover, and the filter from the mounting opening. A filter element that is inserted into the installation space and attached to the case body, and that divides the filter installation space into an inlet side space that communicates with the inlet opening and an outlet side space that communicates with the outlet opening. Air that has flowed into the space is filtered through the filter element, and then flows out of the outlet side space through the outlet opening. In the air cleaner, the filter element is formed in a container shape that is open at one end, and swings on the outer surface on the other end to an overhanging position protruding outward from the other end and a folding position along the outer surface on the other end. A locking member is provided, and a locked member that can be engaged with the locking member (for example, the insert bolt 52 in the embodiment) is placed on one of the inlet and outlet openings on the inner surface of the case main body in the filter arrangement space. It is provided to face. Then, the filter element is inserted into the filter installation space from the mounting opening with the locking member being swung to the folding position, and the container-like opening on one end side surrounds one of the inlet and outlet openings, The locking member in a state of being in contact with the locked member is swung to the extended position, and this swinging pushes the filter element to the other end side to open the container-like opening to the inlet and outlet openings. It surrounds one side and is comprised so that it may contact | adhere with the inner surface of a case main body.

  Moreover, it is preferable to form the fitting part (for example, filter attachment part 13 in embodiment) which can be fitted with a container-shaped opening part around one side of the inlet_port | entrance and outlet opening in the inner surface of a case main body.

  Also, a pedestal member (for example, a pedestal portion in the embodiment) provided on the locked member and having a mounting surface on which the locking member that is formed as the locked member and swings to the protruding position is mounted. 17) and a fixing member (for example, the stopper 53 in the embodiment) that clamps and fixes the locking member mounted on the mounting surface with respect to the pedestal member are preferably provided.

  Further, the locked member is a bolt protruding from the mounting surface, the fixing member is formed so as to be insertable into the bolt, a nut (for example, a wing nut 54 in the embodiment) is screwed to the bolt, and the bolt is connected to the bolt via the nut. The fixing member to be inserted is configured to be pressed against the locking member, and the fixing member is provided with a detent portion that locks with the side surface of the locking member and prevents interlocking rotation of the fixing member due to screwing of the nut. It is preferable to configure.

  According to the air cleaner according to the present invention, one of the inlet and outlet openings is provided in the case main body, and the other end side outer surface of the filter element formed in a container shape having an opening on one end side from the other end side. A locking member is provided so as to be swingable at an overhanging position protruding outward and a folding position along the outer surface on the other end side, and a cover that can be locked to the locking member facing one of the inlet and outlet openings. A locking member is provided. When the filter element is inserted into the filter installation space, the locking member is swung to the folding position and inserted from the mounting opening, and the locking member is locked to the locked member while being in the folding position. The locking member is swung to the protruding position in the filter disposition space so that the filter element is brought into close contact with the inner surface of the case body. In this way, the filter element is held by the case body by positioning the locking member in the extended position and extending, but by swinging the locking member to the folding position, one end of the filter element is The size in the direction from the side toward the other end can be made smaller than the size required to hold the filter element in the filter arrangement space. For this reason, if the size from the locking member in the folding position to the one end side of the filter element is secured as the size of the mounting opening, the filter element can be inserted. In addition, the filter element inserted into the filter installation space can be held in the filter installation space by a simple operation of swinging the locking member. It can be carried out. Since the container-like opening surrounds one of the inlet and outlet openings and is in close contact with the inner surface of the case body, the inlet-side space and the outlet-side space are completely partitioned between the container inner surface side and the container outer surface side of the filter element. It is supposed to be.

  Moreover, the fitting part which fits with a container-shaped opening part is formed in the circumference | surroundings of one of the inlet_port | entrance and outlet opening in the inner surface of a case main body which a container-shaped opening part contact | abuts. Thereby, when mounting a filter element to a case main body, attachment positioning of a container-shaped opening part can be performed using a fitting part, and the mounting operation | work of a filter element can be performed easily.

  Provided on the inner surface of the case body is a pedestal portion on which the locking member in the overhanging position is placed, and the locking member placed on the upper surface of the pedestal portion is the pedestal portion. The fixing member for pinching and comprising with respect to is provided. Thus, since the locking member in the extended position is clamped with respect to the pedestal portion, swinging of the locking member in the folding position direction can be restricted. The filter element is installed in the filter installation space by bringing the container-shaped opening into close contact with the inner surface of the case body with the locking member as the overhanging position. It can be stably fixed in the space.

  Further, the locked member is a bolt protruding from the mounting surface of the base member, and the fixing member is inserted into the bolt and the nut is screwed onto the bolt, thereby pressing the fixing member against the engaging member via the nut. In this way, the locking member is clamped, the locking member is provided with a detent portion that locks with the side surface of the locking member, the fixing member is fixed to the locking member, and the fixing member does not interlock with the rotation of the nut. It is configured. When such interlocking rotation occurs, there is a possibility that the surface of the fixing member that presses the locking member comes off from the place to be pressed, and the swinging of the locking member cannot be restricted. According to this configuration, such interlocking rotation can be prevented, and the swinging of the locking member by the fixing member can be reliably performed.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 and 2 show an air cleaner 1 according to the present invention in an assembled state and an exploded state, respectively. As shown in the drawing, the air cleaner 1 of the present embodiment is inserted into the filter arrangement space H and a case 2 having an inlet opening A1 and an outlet opening A2 that form a filter arrangement space H and communicate therewith. The filter element 3 is attached to the case 2. The case 2 includes a case main body 10 and a cover 20, and the case main body 10 is provided with a mounting opening A3 communicating with the filter disposition space H. The cover 20 is attached to the case main body 10 so as to cover the mounting opening A3. The filter element 3 is inserted into the filter disposition space H from the mounting opening A3, and the filter disposition space H is partitioned into an inlet side space H1 where the inlet opening A1 communicates and an outlet side space H2 where the outlet opening A2 communicates. Installed.

  Such an air cleaner 1 is provided in an engine intake system of a buggy vehicle, for example, and is connected to an engine or the like via an exhaust pipe 4 attached to an outlet opening A2, and air is supplied from the inlet opening A1 to the inlet side space H1. The air that has flowed in is filtered through the filter element 3 and flows out from the outlet side space H2 through the outlet opening A2, and the purified air is supplied to the engine or the like through the exhaust pipe 4. It is like that. In the following, directions are described using “up / down / front / rear / left / right” as appropriate for convenience, and in each drawing, directions of up / down / front / rear / left / right corresponding to the following description are indicated by arrows (the following description of the direction Not based on paper direction).

  The case 2 includes a case body 10 that forms a filter placement space H and has a mounting opening A3 that communicates with the filter placement space H, and a cover 20 that covers the mounting opening A3 and is attached to the case body 10. . The case main body 10 of the present embodiment is formed by joining both the left case half 11 forming the left space Ha and the right case half 16 forming the right space Hb to form the left case half 11. The edge portion 11f of the opening portion 11a that opens the left space Ha is aligned with the edge portion 16f of the opening portion 16a that opens the right space Hb of the right case half 16.

  As shown in FIG. 3, the left case half 11 has a left-side space Ha having an open portion 11 a shown in the figure on the right side as one half of the case body 10, and has heat resistance and vibration resistance. It is molded by injection molding of a provided thermoplastic resin material (for example, PPG20 (polypropylene added with 20% glass fiber)). The left end wall 11b is provided with a circular outlet opening A2. A pipe mounting portion 12 is provided on the outer surface of the left end wall 11b so as to protrude cylindrically from the outlet opening A2. A cylindrical filter mounting portion 13 that is substantially concentric with the circular outlet opening A2 and has an inner diameter larger than the diameter of the outlet opening A2 is provided on the inner surface of the left end wall 11b so as to protrude into the left space Ha.

  As shown in FIG. 4, the right case half 16 has an open portion 16 a having a shape shown on the left side as the other half of the case body 10 to form a right space Hb, and is formed on the upper end wall 16 c. A mounting opening A3 that communicates with the right space Hb is provided, and is molded by injection molding of the material in the same manner as the left case half 11. Further, on the inner surface of the right end wall 16b, a pedestal portion 17 having a flat upper surface 17a protrudes into the right space Hb and is provided integrally with the right end wall 16b. An insert bolt 52 is provided on the pedestal portion 17 so as to extend upward from the upper surface 17a, and one end side of the insert bolt 52 is fixed on the back side of the upper surface 17a of the pedestal portion 17 with a nut (not shown). Yes. In addition, locking receivers 18 and 18 having rectangular openings 18a and 18a respectively project upward and are integrally formed on the right end wall 16b on the outer surface upper portion of the right side wall 16b, and the left side of the upper end wall 16c. Screw holes 19, 19 are provided through both ends of the front and rear of the edge portion.

  The edge portion 11f of the open portion 11a of the left case half body 11 and the edge portion 16f of the open portion 16a of the right case half body 16 are formed symmetrically in a front view. By aligning the edge portions 11f and 16f of such open portions 11a and 16a and joining the halves 11 and 16 using a joining means such as vibration welding, the left space Ha and the right space Hb are joined. And a filter arrangement space H is formed, and the case body 10 has an integral structure. In the case body 10, the outlet opening A2 formed in the left end wall 11b and the insert bolt 52 provided in the pedestal portion 17 protruding from the right end wall 16b face each other in the left-right direction. Below, what is formed or provided in the left case half 11 or the right case half 16 will be described as that of the case body 10.

  As shown in FIG. 5, the cover 20 has an open portion 20a that opens in a substantially rectangular shape on the lower side to form an upper space Hc, and an entrance opening A1 that communicates with the upper space Hc passes through the left surface 20b. In the same manner as the case main body 10, it is formed by injection molding of a material. Further, in the edge portion 20f of the open portion 20a, locking projections 21 and 21 extending in a rectangular plate shape from the right edge portion to the right are provided integrally with the edge portion 20f, and both front and rear end portions of the left edge portion. Screw holes 22 and 22 are respectively provided through the top and bottom.

  The cover 20 has the locking projections 21 and 21 inserted into the openings 18 a and 18 a of the locking receivers 18 and 18 provided on the case body 10, so that the edge 20 f of the opening 20 a of the cover 20 is formed. Attached to the upper end wall 16c of the case body 10 and covers the attachment opening A3 of the case body 10 for attachment. At this time, the screw holes 19 and 19 provided in the case main body 10 and the screw holes 22 and 22 provided in the cover 20 are aligned vertically at both front and rear ends. The bolt 2 is inserted into the aligned screw holes 19 and 22 and screwed together, and the case body 10 and the cover 20 are fastened to form the case 2. As described above, the cover 20 is detachably attached to the case body 10.

  In the case 2 of the present embodiment, the filter disposition space H formed in the case main body 10 communicates with the upper space Hc formed in the cover 20 via the attachment opening A3. The inlet opening A1 provided in the cover 20 communicates with the filter arrangement space H through the upper space Hc and the mounting opening A3, and the outlet opening A2 provided in the case body 10 communicates.

  An intake duct (not shown) is attached to the inlet opening A1, and an exhaust pipe 4 connected to the engine or the like is fitted to the outlet opening A2 so that the one end opening 4a is fitted to the pipe mounting portion 12 protruding from the outlet opening A2. Attached. The exhaust pipe 4 is formed of a rubber material such as NBR (nitrile rubber), for example, and is fixed using a fixing means such as a clamp. Further, as shown in FIG. 2, a trap 5 for capturing dust or the like made of punching metal covers the opening of the pipe mounting portion 12 between the outlet opening A2 and the one end opening 4a of the exhaust pipe 4. Is interposed.

  As shown in FIG. 6, the filter element 3 is made of, for example, polyurethane foam and impregnated with oil, and a container-shaped filter medium (Scott filter) 30 having an open end is attached to an outer periphery of a cylindrical frame-shaped holder frame 40. It is configured to be attached to the side, and is configured in a cylindrical container shape having a circular opening 3a on one end side and closed on the other end side.

  As shown in FIG. 7, the holder frame 40 includes a circular frame-shaped ring portion 41, a cross-shaped cross portion 42 that faces the ring portion 41 in the axial direction of the ring portion, and each cross end portion and ring of the cross portion 42. The rib portions 43, 43,... Extending between the portions 41 and the above portions 41 to 43 are integrally formed by injection molding of a thermoplastic resin having heat resistance and vibration resistance (for example, PPG20). Has been. In the cross portion 42, a crossing portion 42 a where two sides cross each other is arranged coaxially with the ring portion 41 and faces the ring portion 41. In addition, the holder frame 40 is provided with a connecting portion 44 that protrudes outward in the axial direction from the crossing portion 42a to attach the locking member 51 according to the present invention. It is formed integrally with the frame 40. The connecting portion 44 has a rectangular flat plate-like extension plate 44a protruding outward in the axial direction and side plates 44b and 44b formed on both sides of the extension plate 44a, and the tips of the side plates 44b and 44b. Each part is provided with through holes 44c and 44c.

  The filter element 30 is configured by attaching the filter medium 30 to the holder frame 40 on the outer peripheral side of the ring portion 41, the cross portion 42, and the rib portions 43, 43,. In the filter element 3, the filter medium 30 covers the ring portion 41 of the holder frame 30 in the opening 3 a to form a flange portion 31, and the distal end portion of the connecting portion 44 is the outer surface 32 on the other end side of the filter medium 30. Protruding from.

  As shown in FIG. 8, the engaging member 51 connected to the connecting portion 44 has a rectangular plate-like lever portion 51a and a U-shaped portion 51b formed in a U-groove shape at the tip of the lever portion 51a. The parts 51a and 51b are integrally formed by injection molding of the material in the same manner as the holder frame 40. The lever portion 51a is provided with through holes 51c that penetrate both side surfaces on the base end side.

  The base end side of the lever portion 51a of the engaging member 51 is inserted between the side plates 44b and 44b of the connecting portion, and the pins attached to the through holes 44c and 44c of the connecting portion 44 and the through holes 51c of the lever portion 51a. The engaging member 51 is pivotally connected to the connecting portion 44 via P. As a result, the engagement member 51 has an overhanging position that protrudes outward in the coaxial direction from the connecting portion 44 as shown by a solid line in FIG. 9 and the other end side of the filter element 3 by swinging as shown by a two-dot chain line. It can swing between the folding position folded along the outer surface 32. The swinging in the opposite direction to the swinging direction from the extended position to the folding position is regulated by the extension plate 44a. Further, in the state where the engaging member 51 is swung to the protruding position, the distance from the U-shaped concave end portion of the U-shaped portion 51b to the flange portion 31 formed in the opening 3a of the filter element 3 is the filter It is set slightly larger than the distance between the insert bolt 52 and the outlet opening A3 facing each other in the arrangement space H.

  Next, the process until the filter element 3 provided with the locking member 51 is mounted on the case body 10 will be described with reference to FIGS. The filter element 3 is inserted into the filter arrangement space H of the case body 10 through the mounting opening A3. For this reason, the bolts B and B are unfastened, the cover 20 is removed from the case body 10, and the mounting opening A <b> 3 that opens to the upper end surface 16 c of the case body 10 is exposed.

  The locking member 51 is swung to the folding position, and the filter element 3 is inserted into the filter disposition space H with the rocking direction of the locking member 51 facing downward as the insertion direction of the filter element 3. At this time, the filter element 3 is inserted with the opening 3a facing slightly downward.

  Next, as shown in FIG. 10 (a), the upper part of the ring part 41 is locked to the upper end part 13a of the filter mounting part 13 in the opening part 3a of the filter element 3, and the flange part 31 is placed in the case so as to surround the outlet opening A2. The main body 10 is brought into contact with the inner surface of the left end wall 11b. Along with the locking of the ring portion 41 to the filter mounting portion 13, the U-shaped portion 51 b of the locking member 51 is engaged with the root portion 52 a of the insert bolt 52, and the locking member 51 and the insert bolt 52 are locked. .

  10A, the filter element 3 is pushed downward, and the locking member 51 uses the root 52a, which is the locking position with the insert bolt 52, as a fulcrum. While maintaining the state of being engaged with the bolt 52, it swings in the direction of arrow R to the overhang position. The locking member 51 swinging to the extended position is placed on the upper surface 17a of the pedestal portion 17 with the U-shaped portion 51b locked to the base portion 52a of the insert bolt 52 and the tip of the lever portion 51a. At this time, the locking member 51 does not swing beyond the protruding position due to the restriction of the extension plate 44a of the connecting portion 44, and the locking member 51 is reliably pivoted from one end side to the other end side. It can be mounted on the upper surface 17a so as to extend in the direction and project.

  The filter element 3 is pushed to one end side where the opening 3a is formed in accordance with the swinging of the locking member 51 that is held in the locked state with the insert bolt 52. It swings in the direction of arrow R ′ with the upper end portion 13a as a fulcrum as a fulcrum. As the filter element 3 swings, the ring portion 41 in the opening 3a is fitted into the filter mounting portion 13 protruding in a cylindrical shape, and the flange portion 31 comes into contact with the inner surface of the left end wall 11b so as to surround the outlet opening A2.

  As shown in FIG. 10B, the filter element 3 provided with the locking member 51 is stretched between the root portion 52a of the insert bolt 52 and the inner surface of the left end wall 11b of the case body 10, and the flange portion 31 is brought into close contact with the inner surface of the left end wall 11b and held in the filter arrangement space H. Note that the distance from the U-shaped concave end portion of the U-shaped portion 51b to the flange portion 31 formed in the opening 3a of the filter element 3 in the state where the engaging member 51 is in the protruding position is the filter disposition space H. Is set to be slightly larger than the distance between the opposing insert bolt 52 and the outlet opening A3. However, the filter medium 30 of this embodiment is made of polyurethane foam and has elasticity, and the flange portion 31 is It bends and the adhesiveness with the left end wall 11b is ensured. In addition, this structure ensures adhesion after absorbing dimensional tolerances.

  The locking member 51 placed on the upper surface 17 a of the pedestal portion 17 in the extended position is fixed by a stopper 53. Hereinafter, the stopper 53 will be described with reference to FIG. The stopper 53 includes a shaft portion 53b formed with a hollow 53a passing through the shaft center, a clamping surface 53c formed perpendicular to the axial direction of the shaft portion 53b at one end of the shaft portion 53b, and both sides of the clamping surface 53c. It has the rotation prevention parts 53d and 53d extended, and is integrally molded by the injection molding of material like the case main body 10.

  The stopper 53 has a hollow 53a that is slightly larger in diameter than the insert bolt 52, and can be inserted into the insert bolt 52 through the hollow 53a. The clamping surface 53c is formed in a shape that matches the portion of the locking member 51 placed on the upper surface 17a of the pedestal portion 17 in plan view. The rotation preventing portions 53d and 53d are formed to extend from both sides of the clamping surface 53c in the direction opposite to the extending direction of the shaft portion 53b, and the clamping surface 53c and the rotation preventing portions 53d and 53d are formed in a substantially U-shaped cross section.

  As shown in FIG. 12, the stopper 53 extends from the opening end on the side where the clamping surface 53c is formed through the mounting opening A3 to the insert bolt 52 in a state where the filter element 3 is held in the filter arrangement space H. Inserted. Then, the holding surface 53c is brought into contact with the locking member 51, and the side surfaces of the locking member 51 are locked by the rotation preventing portions 53d and 53d. As a result, the sandwiching surface 53 c having a substantially U-shaped cross section and the rotation preventing portions 53 d and 53 d are fitted to the locking member 51, and the stopper 53 is fixed to the locking member 51.

  Further, as shown in FIG. 12, a wing nut 54 is screwed onto the insert bolt 52 through the mounting opening A3. The wing nut 54 is directed downward in contact with the upper end of the stopper 53. The locking member 51 is pressed downward by the clamping surface 53 c of the stopper 53 and is fixed to the upper surface 17 a of the pedestal portion 17. Since the stopper 53 is fixed to the locking member 51 by the rotation preventing portion 53d, the stopper 53 does not rotate in conjunction with the rotation of the wing nut 54 even if the upper end contacts the wing nut 54.

  In this way, the filter element 3 is fixed to the case 2 and the attachment to the case body 10 is completed. Further, the cover 20 is attached to the case body 10 to complete the assembly of the air cleaner 1. In the air cleaner 1, an inlet side space H <b> 1 in which the inlet opening A <b> 1 communicates is formed on the container outer surface side of the filter element 3, and an outlet side space H <b> 2 in which the outlet opening A <b> 2 communicates is formed on the container inner surface side.

  Thereby, the air from the intake duct flows into the upper space Hc from the inlet opening A1, and flows into the inlet side space H1 of the case body 10 from the mounting opening A3. The air that has flowed into the inlet side space H1 passes through the filter medium 30 of the filter element 3 from the outer surface of the container to the inner surface of the container, is filtered, cleaned, and flows into the outlet side space H2. The air in the outlet side space H2 flows out from the outlet opening A2 and is supplied to the engine or the like via the exhaust pipe 4.

  The filter element 3 attached to the case body 10 is taken out by reversing the attachment procedure. That is, the wing nut 54 is removed, and the stopper 52 is removed from the insert bolt 52. Further, as shown by a dotted arrow F in FIG. 10B, when the filter element 3 is pulled upward, the locking member 51 swings in the direction of the dotted arrow R with the root portion 52a of the insert bolt 52 as a fulcrum. The locked state with the insert bolt 52 is released, and the filter element 3 swings in the direction of the dotted arrow R ′ with the upper end portion 13a of the filter mounting portion 13 as a fulcrum to release the contact state with the left end wall 11b. Thereby, the filter element 3 can be taken out from the mounting opening A3.

  Thus, according to the air cleaner 1 according to the present invention, the case body 10 is provided with the outlet opening A2, and the other end side outer surface 32 of the container-like filter element 3 having the opening 3a on one end side is provided on the other side. A locking member 51 is provided so as to be swingable at an extended position protruding outward from the end side and a folded position along the outer surface 32 on the other end side, and locked to the locking member 51 so as to face the outlet opening A2. Possible insert bolts 52 are provided. When the filter element 3 is inserted into the filter disposition space H, the locking member 51 is swung to the folding position and inserted from the mounting opening A3, and the locking member 51 is inserted into the insert bolt while being in the folding position. The filter element 3 is brought into close contact with the inner surface of the case main body 10 by being locked to 52 and rocking the locking member 51 in the filter installation space H to the protruding position. In this way, the filter element 3 is held by the case body 10 by causing the locking member 51 to be positioned and extended, and by swinging the locking member 51 to the folding position, The filter element 3 can be inserted with a size in a direction from one end side to the other end side smaller than a size necessary for holding the filter element 3 in the filter arrangement space H. For this reason, if the size from the locking member 51 in the folding position to the one end side of the filter element 3 is secured as the size of the mounting opening A3, the filter element 3 can be inserted. The filter element 3 can be held in the filter arrangement space H by a simple operation of pushing the filter element 3 inserted into the filter arrangement space H downward and swinging the locking member 51. The mounting work can be easily performed. Further, the detaching operation can be easily performed by the reverse procedure of the mounting operation, and the detaching and replacing operation can be easily performed.

  Moreover, the filter attachment part 13 fitted to the opening part 3a is formed in the circumference | surroundings of outlet opening A2 in the inner surface of the case main body 10 which the opening part 3a of the filter element 3 contacts. Thereby, when attaching the filter element 3 to the case main body 10, attachment positioning can be performed by engaging the opening part 3a with the upper end part 13a of the filter attachment part, and attachment work can be performed easily. .

  In addition, a pedestal portion 17 on which the locking member 51 that is locked to the insert bolt 52 and in the extended position is placed is provided on the inner surface of the case body 10, and is placed on the upper surface 17 a of the pedestal portion 17. A stopper 53 is provided for holding and fixing the locking member 51 to the pedestal portion 17. Since the locking member 51 in the extended position is clamped with respect to the pedestal portion 17, the swinging of the locking member 51 in the folding position direction can be restricted. The filter element 3 is held in the filter arrangement space H by bringing the opening 3a into close contact with the inner surface of the case body 10 with the locking member 51 as the overhanging position. 3 can be stably fixed in the filter arrangement space H.

  Further, the locked member for locking the locking member 51 is an insert bolt 52 protruding from the upper surface 17a of the pedestal portion 17, and the stopper 53 is inserted into the insert bolt and the butterfly nut 54 is screwed together. The engaging member 51 is clamped so that the clamping surface 53c of the stopper 53 is pressed against the engaging member via the nut 54, and the stopper 53 is provided with a detent portion 53d for locking with the side surface of the locking member 51. The stopper 53 is fixed to the locking member 51 so that the stopper 53 does not interlock with the rotation of the wing nut 54. When such interlocking rotation occurs, there is a possibility that the clamping surface 53c may come off from the place where the locking member 51 should be pressed. With the configuration of the above embodiment, such interlocking rotation can be prevented, so that the swinging of the locking member 51 by the stopper can be reliably performed. Furthermore, the insert bolt 52 is provided to extend upward where the attachment opening A3 is provided, and the insertion operation of the stopper 53 and the screwing operation of the wing nut 54 can be easily performed via the attachment opening A3. The filter element can be easily attached and detached.

  As mentioned above, although the Example of the air cleaner which concerns on this invention was described, it is not necessarily restricted to the said form. For example, in the case 2 of the above embodiment, the case body 10 forming the filter disposition space H is provided with the outlet opening A2 so as to be surrounded by the opening 3a of the filter element 3, and the cover 20 is provided with the inlet opening A1. However, the inlet opening A1 and the outlet opening A2 may be interchanged to form the inlet side space H1 in the filter element 3, or the cover body 10 may be configured to communicate with the filter arrangement space H. In the present invention, the inlet opening A1 and the outlet opening A2 may be provided, and the present invention can be similarly implemented, and the same effect can be obtained. Further, although the outlet opening A2 is provided in the left end wall of the case body 10, it may be provided in the front end wall or the rear end wall of the case body 10.

  Although the shape of the opening 3a of the filter element 3 is circular in the above embodiment, the present invention can be similarly implemented even if it is appropriately changed as long as it can be attached to the case body 10 while being in close contact with the inner surface. Yes, the same effect can be obtained. The shape of the filter mounting portion 13 can be changed as appropriate as long as the opening 3a can be fitted therein.

  The stopper 53d of the stopper 53 is provided so as to extend downward from both sides of the clamping surface 53c and is fitted to the locking member 51 together with the clamping surface 53c to be locked to the locking member 51. However, if the stopper 53 can be fixed to the locking member 51 by locking with the locking member 51, for example, it is formed in a claw shape and locked to the side surface of the locking member 51. However, the present invention can be similarly implemented, and the same effect can be obtained. The same effect can be obtained not only in the configuration in which the rotation preventing portion 53d is locked to the locking member 51 but also in the configuration in which the stopper 53 can be fixed to the pedestal portion 17 by locking with the pedestal portion 17. it can. At this time, for example, a slit may be provided on the upper surface 17a of the pedestal portion 17, and the rotation preventing portion 53d provided to extend downward from both sides of the holding surface 53c may be engaged with the slit.

  The “up / down / front / back / left / right” used in the explanation of the direction of the air cleaner according to the present invention is used for convenience in explanation of the configuration and is not necessarily limited to this direction. It is not limited to this direction in the mounted state.

1 is an external perspective view of an air filter according to the present invention. It is a perspective view which shows the said air filter in a decomposition | disassembly state. It is a perspective view of the left case half which comprises a case main body. It is a perspective view of the right case half which comprises a case main body. It is a perspective view of a cover. It is a perspective view of a filter element. The holder frame is shown, (a) is a plan view and (b) is a side view. The locking member is shown, (a) is a side view and (b) is a plan view. It is a side view which shows the securing member pivotally connected by the filter element. It is a sectional side view of a case, (a) is in a state where the locking member is locked to the insert bolt in the folding position, (b) is a locking member in a state where the locking member is locked to the insert bolt in the extended position. The state of swinging is shown. The stopper is shown, (a) is a side view, (b) is an arrow view seen in the direction of arrow b shown in (a). It is a sectional side view of a case which shows the state which attached the stopper and the wing nut to the insert bolt.

Explanation of symbols

H Filter installation space A1 Inlet opening A2 Outlet opening A3 Mounting opening 1 Air cleaner 2 Case 3 Filter element 3a Opening (container opening)
10 Case body 13 Filter mounting part (fitting part)
17 Base (base member)
17a Upper surface (mounting surface)
20 Cover 30 Filter medium 32 Outer surface 40 on the other end side Holder frame 51 Locking member 52 Insert bolt (locked member)
53 Stopper (fixing member)
53d Non-rotating part 54 Wing nut (nut)

Claims (4)

A case main body having a mounting opening formed therein and having a mounting opening communicating with the filter mounting space; and a cover that covers the mounting opening and is detachably attached to the case. One of an inlet opening and an outlet opening communicating with the case body is provided in the case body, and the other of the inlet and outlet openings is provided in either the case body or the cover;
A filter element that is inserted into the filter installation space from the mounting opening and attached to the case body, and partitions the filter installation space into an inlet side space that communicates with the inlet opening and an outlet side space that communicates with the outlet opening And consists of
In the air cleaner for filtering the air flowing into the inlet side space from the inlet opening through the filter element and flowing out of the outlet side space from the outlet opening,
The filter element is formed in a container shape having an opening on one end side, and swings on an outer surface on the other end side to an overhanging position protruding outward from the other end side and a folding position along the outer surface on the other end side. A locking member is provided to be movable,
A locked member that can be engaged with the locking member is provided on the inner surface of the case body in the filter disposition space so as to face one of the inlet and outlet openings,
The filter element is inserted into the filter disposition space from the mounting opening in a state where the locking member is swung to the folding position, and the container-like opening on one end side of the inlet and outlet openings The locking member is swung to the extended position with the locking member being locked to the locked member while being in contact with the inner surface of the case so as to surround one side, and the filter element is moved to the one end side. An air cleaner, wherein the air cleaner is configured such that the container-shaped opening is pressed and surrounds one of the inlet and outlet openings and is in close contact with the inner surface of the case body.   The air cleaner according to claim 1, wherein a fitting portion that can be fitted to the container-like opening is formed around one of the inlet and outlet openings on the inner surface of the case body. A pedestal member provided on the locked member and having a mounting surface for mounting the locking member rocked to the extended position in a locked state with the locked member;
The fixing member which clamps and fixes the said locking member of the state mounted in the said mounting surface with respect to the said base member is provided, and it is comprised, The structure of Claim 1 or 2 characterized by the above-mentioned. Air cleaner. The locked member includes a bolt protruding from the mounting surface, and the fixing member is formed so as to be insertable into the bolt, and a nut is screwed into the bolt and is inserted into the bolt via the nut. Configured to press the fixing member against the locking member;
4. The air cleaner according to claim 3, wherein the fixing member includes a rotation preventing portion that is locked to a side surface of the locking member and prevents interlocking rotation of the fixing member due to screwing of the nut.

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