JP2005161262A - Filter element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter element, whose configuration is simple and the filter media of the filter element where the filter media is easily taken out from the interior of the element. <P>SOLUTION: The filter element 10 is provided with a casing 20, a lid member 40 and the filter media 30. The casing 20 has an end plate 22 with a through-hole 23 at its center, one end in an axial direction of which is fixed along the circumferential edge of the plate 22, and an external cylinder 26 of almost cylindrical shape where a plurality of through-holes 26a are formed. The member 40 is detachably fixed to the other end in the axial direction of the cylinder 26 so as to cover the other end of the cylinder 26. The media 30 is almost cylindrical, and is insertably disposed from the other end in the axial direction of the cylinder 26 inside the cylinder 26. The media 30 is held between the member 40 and the plate 22 when the member 40 is fixed to the other end in the axial direction of the cylinder 26. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a filter element.

As the types of air filters used in the supply / exhaust system of an internal combustion engine, there are an oil tank type, a dry type, a wet type, a cyclone type, and a combination type. In a large internal combustion engine, as shown in FIG. 4, a combination of a cyclone type and a dry type is used, and dust with a large particle size is captured by a dust pan by the centrifugal force of the cyclone blade, and only a small particle size dust is captured by the next element. An air filter of a formula is used (for example, see Non-Patent Document 1).
"Mechanical Engineering Handbook: Application B7 Internal Combustion Engine" The Japan Society of Mechanical Engineers, October 30, 1985, p. 19-20

  For example, in a combination type air filter for a truck diesel engine, the element is regularly replaced with a new one as a replacement part as a whole. In such an element, a filter medium made of a material other than metal is accommodated in a metal casing. This filter medium is fixed by adhesion or the like so that there is no gap between the filter medium and the casing. In general, since the casing cannot be disassembled, the filter medium stored inside cannot be taken out from the element that is no longer needed. Therefore, it is rare to separate and recycle materials.

  If the filter medium can be taken out from the inside of the element, the element can be separated and recycled. Also, the casing can be reused and only the filter medium with dust attached can be replaced. Furthermore, it is possible to wash the filter medium and reuse the filter medium. However, if the structure of the element is complicated, the burden of disassembling / assembling work increases, and the manufacturing cost also increases.

  In view of such circumstances, the present invention is intended to provide a filter element in which it is easy to take out the filter medium from the inside of the element and the structure is simple, and a filter medium for the filter element.

  In order to solve the above technical problem, the present invention provides a filter element having the following configuration.

  The filter element includes a casing, a lid member, and a filter medium. The casing includes an end plate having a through hole in the center, and a substantially cylindrical outer tube in which one end in the axial direction is fixed along the outer peripheral edge of the end plate and a large number of through holes are formed. The lid member is detachably fixed to the other axial end of the outer cylinder so as to cover the other axial end of the outer cylinder. The filter medium has a substantially cylindrical shape, and is disposed inside the outer cylinder so as to be freely removable from the other axial end of the outer cylinder, and the lid member is fixed to the other axial end of the outer cylinder. When sandwiched between the lid member and the end plate.

  In the above configuration, the filter medium is inserted into the outer cylinder from the other axial end of the outer cylinder, and the filter medium is disposed inside the outer cylinder. And a filter element will be in a usable state by fixing a cover member to the axial direction other end of an outer cylinder. On the other hand, by removing the lid member from the other axial end of the outer cylinder, the filter medium disposed inside the outer cylinder can be taken out from the other axial end of the outer cylinder.

  According to the said structure, a filter medium can be isolate | separated from a casing only by removing the cover member detachably fixed to the outer cylinder from the outer cylinder. The filter element can be composed of simple shaped parts such as a cylinder or a plate.

  Preferably, the casing has a substantially cylindrical inner cylinder in which a large number of through holes are formed. The inner cylinder has one axial end fixed along the inner peripheral edge of the end plate, extends along the outer cylinder, and the lid member is fixed to the other axial end of the outer cylinder. The other axial end is in contact with the lid member. The filter medium is disposed between the outer cylinder and the inner cylinder.

  According to the above configuration, when the lid member is fixed to the outer cylinder, the lid member can be supported by the outer cylinder and the inner cylinder so that the lid member does not apply excessive force to the filter medium.

  Preferably, the lid member has a through hole communicating with the space inside the inner cylinder.

  According to the above configuration, for example, the front end side of the screw rod for fixing the filter element is inserted from the end plate side into the space inside the inner cylinder, penetrates the through hole of the lid member, and the front end side of the screw rod By screwing the nut into the nut, the lid member can be pressed against the proximal end side of the screw rod to fix the filter element, and at the same time, the lid member can be fixed to the other end of the outer cylinder. Since two fixing operations can be performed simultaneously, the operation is simplified. Further, since the configuration used only for fixing the lid member to the other end of the outer cylinder is not necessary, the configuration is simplified.

  Preferably, an end member having a through hole at the center is fixed to the one end in the axial direction and the other end in the axial direction.

  According to the said structure, since the shape of a filter medium can be hold | maintained by fixing an end member to the both ends of a filter medium, handling of the filter medium inserted / removed to an outer cylinder becomes easy. In addition, when the lid member is fixed to the other end in the axial direction of the outer cylinder, it is possible to prevent a gap from being formed in the vicinity of both ends of the filter medium, so that it is possible to prevent a decrease in dust capture rate.

  Preferably, the filter medium is folded in a pleat shape so that a fold line extends in the axial direction.

  The filter medium requires a certain degree of rigidity so that it can be easily handled when being inserted into and removed from the outer cylinder. However, according to the above configuration, the rigidity of the filter medium itself can be increased with a simple configuration called a folding line.

  The present invention also provides a filter element filter medium used in the filter elements having the above-described configurations.

  That is, the filter element has a substantially cylindrical outer cylinder in which an end plate having a through hole in the center and an axial end of the end plate are fixed along the outer peripheral edge of the end plate, and a plurality of through holes are formed. And a lid member that is detachably fixed to the other axial end of the outer cylinder so as to cover the other axial end of the outer cylinder. The filter medium has a substantially cylindrical shape, and is disposed inside the outer cylinder so as to be freely removable from the other axial end of the outer cylinder, and the lid member is fixed to the other axial end of the outer cylinder. When sandwiched between the lid member and the end plate.

  Preferably, the casing has a substantially cylindrical inner cylinder in which a large number of through holes are formed. The inner cylinder has one axial end fixed along the inner peripheral edge of the end plate, extends along the outer cylinder, and the lid member is fixed to the other axial end of the outer cylinder. The other axial end is in contact with the lid member. The filter medium is disposed between the outer cylinder and the inner cylinder.

  Preferably, the lid member has a through hole communicating with the space inside the inner cylinder.

  Preferably, an end member having a through hole in the center is fixed to the one axial end and the other axial end.

  Preferably, the filter medium is folded in a pleat shape so that a fold line extends in the axial direction.

  In the filter element of the present invention, it is easy to take out the filter medium from the inside of the element, and the configuration is also simple. Moreover, the filter medium of the filter element of the present invention can be easily taken out from the inside of the element, and the configuration is also simple.

  Hereinafter, examples of the present invention will be described with reference to FIGS.

  As shown in the sectional view of FIG. 1, a filter element (hereinafter simply referred to as “element”) 10 houses a filter medium 30 in a casing 20 and is closed by a lid member 40. Element 10 can be used in place of a conventional, non-decomposable element used in combination air filters for truck diesel engines. A cyclone blade (not shown) is detachably attached to one end side (left side in the figure) of the outer peripheral surface of the casing 20. Air flows from the outside (periphery) to the inside (center) of the filter medium 30 to remove dust, and is supplied to the engine through the through hole 23.

  The casing 20 includes an end plate 22, an inner cylinder 24, an outer cylinder 26, and a packing 28. The end plate 22 is disposed at one end of the casing 20. The end plate 22 has an inner peripheral wall 22a and an outer peripheral wall 22c erected on the same side and perpendicular to the main body portion 22b along the inner and outer peripheral edges of a donut-shaped main body portion 22b having a through hole 23 in the center. ing. One end side of the inner cylinder 24 is arranged along the outer peripheral surface of the inner peripheral wall 22a of the end plate 22, and one end side of the outer cylinder 26 is arranged along the inner peripheral surface of the outer peripheral wall 22c of the end plate 22, , Fixed to the end plate 22. A large number of through holes 24 a and 26 a are formed in the inner cylinder 24 and the outer cylinder 26. A hollow hole 11 communicating with the through hole 23 of the end plate 22 is formed inside the inner cylinder 24. For example, the end plate 22, the inner cylinder 24, and the outer cylinder 26 are each made of a metal plate and welded. The packing 28 has a ring shape and is bonded to the outer surface of the main body portion 22 b of the end plate 22.

  The filter medium 30 has end members 34 fixed to both ends of the filter medium main body 32. As shown in the cross-sectional view of FIG. 2, the filter medium main body 32 is formed by repeatedly bending a filter material such as filter paper or non-woven fabric into a pleated shape, and connecting the ends with a connecting member 33 so that the fold line extends in the axial direction. It is formed into a substantially cylindrical shape. As shown in FIG. 1, the end member 34 has an inner peripheral wall 34 a and an outer peripheral wall 34 c erected along the inner peripheral edge and the outer peripheral edge of the doughnut-shaped main body part 34 b perpendicular to the main body part 34 b and on the same side. ing. By applying an adhesive in advance to a donut-shaped recess formed by the main body portion 34b, the inner peripheral wall 34a and the outer peripheral wall 34c, and inserting the end portions 32a and 32b of the filter medium main body 32, the end portions 32a and 32b and the end member 34 are fixed without a gap.

  The lid member 40 is detachably disposed at the other end (right side in the drawing) of the casing 20 so as to cover and close the other end of the casing 20. In the lid member 40, an inner peripheral wall 40c and an outer peripheral wall 40a are erected along the inner peripheral edge and the outer peripheral edge of the doughnut-shaped main body part 40b so as to be perpendicular to the main body part 40b and on the same side. A packing 42 is bonded to the main body 40b on the same side as the inner peripheral wall 40c and the outer peripheral wall 40a. An inclined portion 40d and a central portion 40e extend in a substantially truncated cone shape from the opposite side of the inner peripheral wall 40c to the main body portion 40b. A through hole 40s is formed in the center portion 40e. The inner peripheral wall 40c, the inclined portion 40d, and the central portion 40e enter the inside of the element 10 to form a space 40t.

  Next, attachment / detachment of the element 10 will be described with reference to FIG.

  The filter medium 30 is housed in the casing 20 from the other end side of the casing 20, that is, between the inner cylinder 24 and the outer cylinder 26, and the lid member 40 is disposed on the other end of the casing 20 to assemble the element 10. . Next, the element 10 is moved as shown by an arrow 6 with respect to the threaded rod 2 protruding in the housing (not shown) of the air filter, and the threaded rod 2 is moved from one end side of the element 10 to the hollow hole. 11, and through the through hole 40 s of the lid member 40. At this time, the inner cylinder 24 protects the inner peripheral side of the filter medium 30 so that the screw rod 2 does not hit the filter medium 30. Next, the nut 4 is screwed into the screw rod 2 to fix the element 10 in the air filter. At this time, the nut 4 is accommodated in the space 40t of the lid member 40, and the packing 28 is crimped to the inner wall of the housing of the air filter. Since the lid member 40 abuts against the inner cylinder 24 and the outer cylinder 26, an excessive force is not applied to the filter medium 30.

  When removing the element 10, the nut 4 is removed, the element 10 is moved in the direction opposite to the arrow 6, and pulled out from the screw rod 2. The removed element 10 can take out the filter medium 30 from the casing 20 by removing the lid member 40.

  As described above, the element 10 can easily take out the filter medium 30 from the inside.

  Since the element 10 can be easily disassembled, the material can be separated and recycled. Moreover, the casing 20 and the lid member 40 can be reused, and only the filter medium 30 to which dust has adhered can be replaced. Furthermore, the filter medium 30 can be washed and reused.

  The element 10 can be sized and configured to be compatible with a conventional element that cannot be disassembled to take out the filter medium, and can be used instead of the conventional element.

  In addition, this invention is not limited to above-described embodiment, It can implement in a various aspect.

  For example, in the embodiment, the lid member 40 is fixed to the casing 20 at the same time as the element 10 is fixed by the nut 4, but is not limited thereto. For example, by providing a fixture such as a latch, the lid member may be detachably fixed to the casing separately from the element. A mode of fixing the element in the air filter is arbitrary.

  Further, the casing 20 may be configured without the inner cylinder 24.

  A packing may be provided between the end member 34 of the filter medium 30 and the end plate 22 of the casing 20. This packing may be fixed to the end plate 22 of the casing 20 or the end member 34 of the filter medium 30 as a separate and independent member.

  The packing 42 between the end member 34 of the filter medium 30 and the lid member 40 may be fixed to the end member 34 of the filter medium 30 as a separate independent member without being fixed to the lid member 40. A configuration without the packing 42 is also possible.

  The filter element of the present invention and the filter medium of the filter element can be widely used in general for air filters such as an air filter for filtering intake air of a diesel engine of a truck. Furthermore, it can also be used for filter elements for fluids other than air, for example, liquids such as cutting oil.

It is a fragmentary sectional assembly drawing of the element which shows embodiment of this invention. It is sectional drawing cut | disconnected along line II-II of FIG. It is a disassembled perspective view of the element of FIG. 1 is a configuration diagram of a combination type air filter described in Non-Patent Document 1. FIG.

Explanation of symbols

10 elements (filter elements)
11 Hollow hole (inside space)
20 Casing 22 End plate 23 Through hole 24 Inner cylinder 26 Outer cylinder 30 Filter medium 32 Filter medium body 34 End member 40 Lid member 40s Through hole

Claims (10)

An end plate having a through hole in the center;
A casing having a substantially cylindrical outer cylinder in which one end in the axial direction is fixed along the outer peripheral edge of the end plate and a plurality of through holes are formed;
A lid member detachably fixed to the other axial end of the outer cylinder so as to cover the other axial end of the outer cylinder;
Inside the outer cylinder, the outer cylinder is detachably disposed from the other axial end, and when the lid member is fixed to the other axial end of the outer cylinder, the lid member, the end plate, A filter element comprising a substantially cylindrical filter medium sandwiched between the two. The casing is
When one end in the axial direction is fixed along the inner peripheral edge of the end plate, extends along the outer cylinder, and when the lid member is fixed at the other axial end of the outer cylinder, the other axial direction An end is in contact with the lid member, and has a substantially cylindrical inner cylinder formed with a large number of through holes,
The filter element according to claim 1, wherein the filter medium is disposed between the outer cylinder and the inner cylinder.   The filter element according to claim 2, wherein the lid member has a through hole communicating with a space inside the inner cylinder.   4. The filter element according to claim 1, wherein an end member having a through hole in the center is fixed to each of the one axial end and the other axial end of the filter medium. 5. .   The filter element according to any one of claims 1 to 4, wherein the filter medium is folded in a pleat shape so that a fold line extends in an axial direction thereof. An end plate having a through hole in the center;
A casing having a substantially cylindrical outer cylinder in which one end in the axial direction is fixed along the outer peripheral edge of the end plate and a plurality of through holes are formed;
A filter element filter medium used with a lid member detachably fixed to the other axial end of the outer cylinder so as to cover the other axial end of the outer cylinder,
When the lid is fixed to the other axial end of the outer cylinder, the lid is disposed inside the outer cylinder so as to be detachable from the other axial end of the outer cylinder. A filter element filter medium, wherein the filter element is sandwiched between a member and the end plate. The casing is
When one end in the axial direction is fixed along the inner peripheral edge of the end plate, extends along the outer cylinder, and when the lid member is fixed at the other axial end of the outer cylinder, the other axial direction An end is in contact with the lid member, and has a substantially cylindrical inner cylinder formed with a large number of through holes,
The filter medium according to claim 6, wherein the filter medium is disposed between the outer cylinder and the inner cylinder.   8. The filter element filter medium according to claim 7, wherein the lid member has a through hole communicating with a space inside the inner cylinder.   9. The filter element filter medium according to claim 6, wherein an end member having a through hole in the center is fixed to one end in the axial direction and the other end in the axial direction.   10. The filter element filter medium according to claim 6, wherein the filter element is folded in a pleat shape so that a fold line extends in the axial direction.

Images