JP2013180248A - Air filter frame and air filter unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide sufficient strength regardless of light weight, in an air filter frame allowing the replacement of an air filter.SOLUTION: In an air filter frame 11 surrounding the whole periphery of an air filter with removably connected corner members 21 and intermediate members 41, the corner members 21 and the intermediate members 41 are formed of a synthetic resin. The corner member 21 and the intermediate member 41 include: intermediate plate parts 22, 42 receiving the end face of the air filter; and restriction piece parts 23, 43 erected on the edges of the intermediate plate parts 22, 42, and holding the air filter on the intermediate plate part 22. Both ends of a connection direction between the intermediate plate parts 22, 42 and the restriction piece parts 23, 43 are formed with abutment parts 24, 25, 44, 45 face-contacting with each other in a connection state, and are formed with insertion pieces 26 and penetration holes 46a for connection. The inner side faces of the intermediate plate part 22 of the corner member 21 are formed with restriction projecting stripes 28 each having an abutment end face 28a abutting on the end face of the intermediate plate part 22 of the intermediate member 41 in the tip, thus increasing abutment parts and an abutment area.

Description

  The present invention relates to an air filter frame used for air conditioning equipment for building air conditioning, for example, and more particularly to an air filter frame that can ensure strength while reducing weight.

  The air filter frame is formed in a frame shape surrounding the outer peripheral edge of the air filter, and constitutes an air filter unit by holding the air filter. The air filter is formed in a thick plate shape in a front view shape by folding a sheet-like filter medium into a ninety-nine fold shape. For this reason, the air filter frame also has a rectangular shape in front view.

  Since the air filter becomes dirty with use, an air filter unit has been proposed in which the air filter can be replaced to reduce the environmental load (see Patent Document 1 below). The air filter frame of this air filter unit is made of metal because rigidity and durability are required.

  However, since it is made of metal, it is heavy and inconvenient to handle.

  For this reason, although an air filter is not replaceable, an air filter frame made of a synthetic resin that is lighter than metal has been proposed, for example, as in Patent Document 2 below.

  The air filter frame of Patent Document 2 includes a linear intermediate member and a corner member connected to an end of the intermediate member. The intermediate member and the corner member are both U-shaped in cross section and have end faces that are in contact with each other.

  A convex portion that protrudes inward is formed in the intermediate portion in the height direction of the standing portion on both sides of the intermediate member, and a groove is formed below the convex portion. On the other hand, the end surface of the corner member is formed with a single thin portion thinner than other portions, and the thin portion is configured to be inserted into the groove of the intermediate member. Protrusions are provided at positions corresponding to the convex portions on both side portions of the thin portion in order to achieve a strong connection.

  In the air filter unit having such a configuration, the air filter is housed in an air filter frame and fixed with an adhesive.

JP 2007-130551 A JP 2008-119569 A

  However, in the configuration disclosed in Patent Document 2, the end surfaces of the intermediate member and the corner member are in contact with each other, and the thin portion of the corner member and the groove of the intermediate member are combined, but adhesion with an adhesive is necessary. The filter cannot be replaced.

  Even if the air filter is held without an adhesive, the coupling state is maintained by the insertion of the thin portion and the contact resistance due to the protrusion formed on the thin portion, and in the thin portion of the corner member and the intermediate member The portion into which the thin portion is inserted is flat. For this reason, it is difficult to obtain sufficient rigidity. The larger the air filter unit, the less the strength. This is because the larger the air filter unit is, the more rigid the intermediate member itself is, and moreover, the corner member itself is also necessary to support the long intermediate member.

  In particular, in a large air filter unit, when a force for distorting the air filter frame is generated in the air filter unit having a rectangular frame shape, a bending force acts from the inner side surface direction between the corner member and the intermediate member. At this time, the force must be resisted at the abutting portion between the intermediate member and the corner member, but the abutting portion is mainly a standing portion on both sides, so that the portion between the standing portions is sufficient. The opposing force cannot be obtained, and the thin wall portion is broken.

  Therefore, the main object of the present invention is to make it possible to obtain sufficient strength while being lightweight.

  For this purpose, a corner member that holds the corner portion of the outer peripheral edge of the air filter and an intermediate member that is detachably connected to the corner member to hold the corner portion of the outer peripheral edge of the air filter. An air filter frame that surrounds the entire circumference of the air filter, wherein the corner member and the intermediate member are formed of synthetic resin, and the corner member and the intermediate member receive an end face of the air filter. A plate portion and a regulating piece portion that is erected on an edge of the intermediate plate portion and holds the air filter on the intermediate plate portion, and at both ends of the connecting direction of the intermediate plate portion and the regulating piece portion, the corner A contact portion that is in surface contact with each other in a connected state of the member and the intermediate member is formed, and an insertion piece that protrudes in the connection direction is formed at the contact portion of the intermediate plate portion of the corner member, and the intermediate portion The intermediate plate part of the member An insertion part into which a piece is inserted is formed, and an intermediate plate of the intermediate member is connected to the intermediate member in a connected state rising from the surface on the inner or outer surface of the intermediate plate portion of the corner member. It is the air filter frame in which the regulation protrusion which has the contact end surface which contact | abuts the end surface of a part at the front-end | tip is formed.

  In this configuration, when the corner member and the intermediate member are connected to each other, a frame is formed, and the entire circumference of the air filter is surrounded and held. Since the square member and the intermediate member are made of synthetic resin, they can be made light. In the connected state of the corner member and the intermediate member, the intermediate plate portion and the regulating piece portion of the corner member and the intermediate member are in contact with each other at the contact portions at both ends, and the insertion piece and the inserted portion hold the state. The positional relationship between the two is maintained. At this time, the contact end surface of the regulation protrusion formed on the corner member also contacts the contact portion of the intermediate plate portion of the opposing intermediate member. When an external force is applied and a bending force is applied between the corner member and the intermediate member from the inner side surface direction, the load is supported with a large area at many locations including the contact end surface of the regulating protrusion.

  According to the present invention, it is possible to obtain an air filter frame having a sufficient strength while being lightweight and an air filter unit having the air filter frame.

The perspective view which shows the principal part of an air filter frame. The front view of an air filter unit. The perspective view of the square member and intermediate member which comprise an air filter frame. Sectional drawing which shows the state before the connection of a corner member and an intermediate member, and after a connection. The perspective view of the corner member and intermediate member which concern on another example. The perspective view of the connection state of the square member and intermediate member of FIG. Sectional drawing of the connection state of the square member and intermediate member of FIG. The perspective view of the corner member and intermediate member which concern on another example. The perspective view of the corner member and intermediate member which concern on another example.

An embodiment for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing a main part of the air filter frame 11, and FIG. 2 is a front view showing an air filter unit 13 holding the air filter 12 by the air filter frame 11.

  As is well known, the air filter 12 is formed in a thick plate shape having a front view shape by folding the filter medium into a ninety-nine fold shape. The air filter frame 11 is formed in a rectangular frame shape surrounding the entire outer peripheral edge of the air filter 12.

  Specifically, the air filter frame 11 has a corner member 21 that holds the corner portion of the outer peripheral edge of the air filter 12 and the corner member 21 to hold the corner portion of the outer peripheral edge of the air filter 12. And an intermediate member 41 that is detachably connected. In one set of air filter frame 11 or one air filter unit 13, four corner members 21 are provided at each of the four corners, and a total of four intermediate members 41 are provided between the four corner members 21. A total of four are provided.

  The corner member 21 is made of synthetic resin and is formed by injection molding. As shown in FIG. 3, the corner member 21 includes an intermediate plate portion 22 that receives an end surface of the air filter 12 (see FIG. 2), and an air filter 12 that is erected on the edge of the intermediate plate portion 22. Is formed on the intermediate plate portion 22. That is, the cross section is substantially U-shaped. The intermediate plate portion 22 has a right angle like an angle material and has the restricting piece portion 23 so as to close both ends thereof.

  The inner plate 22 has an inner width set to a width corresponding to the thickness of the air filter 12, and the restriction piece 23 has a height set to an appropriate height for holding the air filter 12.

  Both ends of the intermediate plate portion 22 and the restriction piece portion 23 sandwiching a right-angled corner portion, that is, both ends in the connecting direction are in contact with the end face of the intermediate member 41 in a connected state with the intermediate member 41, 25. An insertion piece 26 protruding in the connecting direction is formed in the contact portion 24 of the intermediate plate portion 22 among the contact portions 24 and 25.

  As shown in FIG. 4, the insertion piece 26 has a plate shape thinner than the thickness of the contact portion 24, and the upper surface of the insertion piece 26 is flush with the inner side surface of the intermediate plate portion 22. That is, the insertion piece 26 is formed on the upper side of the abutting portion 24, and a portion in surface contact with the intermediate member 41 is left below the insertion piece 26 in the abutting portion 24. Three insertion pieces 26 are formed in the width direction (direction perpendicular to the connecting direction) with a gap 27 therebetween, and each has a shape in a plan view (see FIG. 3).

  Further, at the position corresponding to the gap 27 on the inner side surface of the intermediate plate portion 22 of the corner member 21, there is a regulating protrusion 28 that rises from the inner side surface of the insertion piece 26 and extends in the connecting direction. The two regulating ridges 28 are continuous over the entire portion between the abutting portions 24 across the corner portion where the regulating ridges 28 bend at right angles, and the abutting portions 24, which are the ends of the intermediate plate portion 22. And a contact end surface 28 a that is in contact with the end surface of the intermediate member 41 in a connected state with the intermediate member 41 at the tip.

  In parallel with the restriction protrusion 28, an auxiliary protrusion 29 that rises from the inner surface and extends in the connecting direction of the insertion piece 26 is formed in the same manner as the restriction protrusion 28 (see FIGS. 1 and 3). The auxiliary ridge 29 is continuous across the corner portion that bends at a right angle similarly to the restriction ridge 28, and two of the three insertion pieces 26 correspond to the insertion pieces 26 on both sides in the width direction. Each book is formed. Unlike the restriction protrusion 28, the length of the auxiliary protrusion 29 is a length over the entire connecting direction including the insertion piece 26. The height of the auxiliary protrusion 29 is set to a height that increases the contact resistance with the intermediate member 41 when connected to the intermediate member 41.

  A retaining protrusion 30 that protrudes downward is formed on the lower surface of the intermediate insertion piece 26 of the three insertion pieces 26. The retaining projection 30 has a short cylindrical shape, and an inclined surface 30a having a chamfered corner in the insertion direction is formed at the tip.

  The intermediate member 41 is made of synthetic resin and is formed by extrusion. As shown in FIGS. 1 and 3, the intermediate member 41 is provided with an intermediate plate portion 42 that receives the end face of the air filter 12 (see FIG. 2), and the air is provided on the edge of the intermediate plate portion 42. A restricting piece 43 for holding the filter 12 on the intermediate plate 42 is formed. That is, it is a long shape having a substantially U-shaped cross section and extending in a straight line.

  The intermediate plate portion 42 has a band shape, and has the restricting piece portions 43 on both edges in a direction (width direction) orthogonal to the longitudinal direction of the intermediate plate portion 42. The width in the width direction including the restriction piece 43 is the same as the length in the width direction of the corner member 21, and the height of the restriction piece 43 is also the same as the height of the restriction piece 23 of the corner member 21. That is, contact portions 44 and 45 that are in surface contact with the contact portions 24 and 25 at both ends of the corner member 21 are also formed at both ends of the intermediate member 41.

  Further, the intermediate plate portion 42 has an insertion portion 46 into which the insertion piece 26 of the corner member 21 is inserted. The insertion portion 46 is formed in a shape surrounding the entire circumference of the insertion piece 26. That is, the cross-sectional side penetrating in the longitudinal direction is constituted by a rectangular through hole 46a. The through holes 46a constituting the inserted portion 46 are formed so as to correspond to the three insertion pieces 26, respectively, and a partition 47 as a protrusion is provided between the through holes 46a. The partition 47 rises in the thickness direction and extends over the entire length direction.

  Therefore, the partition 47 in the contact portion 44 of the intermediate plate portion 42 of the contact portions 44 and 45 and the portion above the partition 47 are in contact with the regulating protrusion 28 in the corner member 21. The end face 28a comes into surface contact.

  Further, as shown in FIG. 4, a circular engagement hole 48 for releasably engaging the retaining projection 30 is formed at a portion corresponding to the retaining projection 30 of the corner member 21 on the lower surface of the intermediate plate portion 42. Is formed.

  In addition, the fine uneven | corrugated strip 49 is formed in the inner surface of the intermediate plate part 42 of the intermediate member 41, and the improvement of rigidity is aimed at.

  In the air filter frame 11 configured as described above, the corner member 21 and the intermediate member 41 are connected, and the air filter 12 is held between the corner member 21 and the restriction piece portion 23 of the intermediate member 41 so that the air filter unit. 13 is obtained. The intermediate member 41 is used by cutting a long one into a required length.

  The corner member 21 is lightweight because it is made of synthetic resin. However, the intermediate plate portion 22 has a restrictive protrusion 28 and an auxiliary protrusion 29, and thus has high rigidity. Similarly, the intermediate member 41 is also light because it is made of a synthetic resin. However, since the intermediate member 41 has a double hollow structure in the top and bottom and has the partition 47 and the concavo-convex ridge 49, the intermediate member 41 has high rigidity. For this reason, handling is convenient and even a large air filter frame 11 can be obtained.

  In connecting the corner member 21 and the intermediate member 41, it is only necessary to insert the three insertion pieces 26 of the corner member 21 into the through holes 46 a of the intermediate member 41. As the insertion piece 26 is inserted, the retaining protrusion 30 engages with the engagement hole 48 of the intermediate member 41, and the connected state is maintained. At this time, since the auxiliary protrusions 29 formed on the insertion piece 26 make strong contact with the ceiling surface in the through hole 46a, a strong coupled state without rattling can be obtained by contact resistance, and the corner member 21 and the intermediate member The positional relationship of 41 is maintained.

  Further, in the connected state, the contact portions 24 and 25 of the corner member 21 and the contact portions 44 and 45 of the intermediate member 41 are in surface contact with each other, and the contact end surfaces of the two restricting ridges 28 of the corner member 21. 28a makes surface contact with the partition 47 portion of the contact portion 44 of the intermediate member 41. In this manner, in addition to the both sides in the width direction of the air filter frame 11, portions that are in contact with each other can be obtained.

  For this reason, even if the air filter frame 11 is enlarged and the intermediate member 41 becomes long, the air filter frame 11 having sufficient strength can be obtained. Even when an external force is applied and the air filter frame 11 is distorted and a bending force is applied between the corner member 21 and the intermediate member 41 from the inner side surface direction, the width direction as well as the width direction both sides. Since a portion in contact with each other can be obtained even on the inner side, the load can be supported with a large area in many places. As a result, it is possible to obtain the air filter frame 11 that is lightweight but has sufficient strength.

  Furthermore, since a plurality of insertion pieces 26 are provided to prevent the width of one insertion piece 26 from increasing, the rigidity of the insertion piece 26 itself can be maintained. For this reason, the effect of obtaining the high rigidity mentioned above can be enhanced.

  In addition, since the regulation protrusion 28 is provided at a position corresponding to the gap between the insertion pieces 26 and the rib-like partition 47 is provided between the through holes 46a of the intermediate member 41, as described above. The abutting end surface 28 a abuts on the partition 47 of the intermediate member 41. For this reason, since the parts that come into contact with each other are raised portions that are strong against compression, the contact end face 28a and the partition 47 part have high mutual strength and are suitable for supporting the load. To contribute to obtaining sufficient strength.

  In addition, in the connected state of the corner member 21 and the intermediate member 41, the regulation protrusion 28 of the corner member 21 and the partition 47 of the intermediate member 41 are continuous and are integrally formed on the entire circumference of the air filter frame. However, the strength which can be countered can be obtained.

  In addition, since the regulation protrusion 28 is provided on the inner side surface of the intermediate plate portion 22 and the retaining protrusion 30 is provided on the lower surface (outer side surface) of the insertion piece 26, the corner member 21 and the intermediate member 41 as described above. When a bending force is applied from the inner surface direction during this period, even the retaining protrusion 30 can resist the bending force, which contributes to obtaining a high connection strength.

  When the air filter 12 is replaced, the corner member and the intermediate member are separated while pushing the retaining protrusion 30 exposed from the engagement hole 48. Since the dirty air filter can be replaced and the air filter frame 11 can be reused, waste of resources can be suppressed and the environmental load can be reduced. If a synthetic resin that forms the corner member 21 and the intermediate member 41 that does not generate harmful gas even if incinerated is used, a further reduction in environmental load can be realized.

  Hereinafter, other examples will be described. In this description, parts that are the same as or equivalent to those in the above-described configuration are given the same reference numerals, and detailed descriptions thereof are omitted.

  In the corner member 21 shown in FIG. 5, a part of the auxiliary protrusions 29 of the plurality of auxiliary protrusions 29 are arranged along a part of the insertion part 46 of the insertion part 46 of the intermediate member 41. It is formed. That is, the inserted portion 46 of the intermediate member 41 has a form in which the upper surface is opened. Specifically, a projecting piece 50 that protrudes inward in the width direction and extends in the longitudinal direction is formed on the inner surface of the lower part in the height direction of the regulating piece 43 on both sides in the width direction of the intermediate member 41, and the intermediate plate part 42. This is a structure in which a portion between the inner side surface and the protruding piece 50 is the insertion portion 46.

  A portion between the projecting pieces 50 on the inner surface of the intermediate plate portion 42 and corresponding to the gap 27 between the insertion pieces 26 of the corner member 21, in other words, the intermediate member 41 shown in FIGS. A protrusion 51 that rises from the inner surface and extends in the longitudinal direction is formed at a portion corresponding to the partition 47. That is, the protrusion 51 rises in the thickness direction and extends over the entire longitudinal direction at a position corresponding to the restriction protrusion 28.

  The height of the auxiliary protrusion 29 is set to a height that reaches the upper surface of the protrusion 50.

  In such a connected state of the corner member 21 and the intermediate member 41, as shown in FIG. 6, the front end surface of the protruding piece 50 constituting the inserted portion 46 is formed on both sides of the auxiliary protrusion 29 in the width direction. The side surface of the auxiliary protrusion 29 comes into contact. In addition, as shown in FIG. 7, the contact end surface 28 a of the restriction protrusion 28 of the corner member 21 and the end surface of the protrusion 51 of the intermediate member 41 abut.

  In the air filter frame 11 including the corner member 21 and the intermediate member 41 configured as described above, the corner member 21 has rigidity obtained by the restriction piece portion 23, the restriction protrusion 28, and the auxiliary protrusion 29. Rigidity is obtained by the restriction piece 43, the protrusion 50 and the protrusion 51. And the connection state without shakiness is obtained by the contact of the protrusion 50 and the auxiliary protrusion 29, and the effect similar to the above can be obtained.

  The corner member 21 shown in FIG. 8 is configured such that the auxiliary protrusions 29 are formed in all three insertion pieces 26, and all the auxiliary protrusions 29 are along the protrusions 50 constituting the insertion portion 46. It is an example. In other words, a protrusion 50 projecting in the width direction is provided at the upper end of the protrusion 51 of the intermediate member 41, and the protrusion 51 and the protrusion 50 form a T-shaped section as a whole.

  Even in the air filter frame 11 including the corner member 21 and the intermediate member 41 configured as described above, rigidity is obtained by the restriction piece portion 23, the restriction protrusion 28, and the auxiliary protrusion 29 in the corner member 21. Rigidity is obtained by the restriction piece 43, the protrusion 50 and the protrusion 51. And the connection state without shakiness is obtained by the contact of the protrusion 50 and the auxiliary protrusion 29, and the effect similar to the above can be obtained.

  The corner member 21 shown in FIG. 9 has the same configuration as the corner member shown in FIGS. 1 and 3, but is an example in which the configuration of the inserted portion of the intermediate member 41 is different. The inserted portion 46 includes a through hole 46 a having a shape surrounding the entire circumference of the insertion piece 26, and a width having the retaining protrusion 30. A portion into which the insertion piece 26 in the middle of the direction is inserted is constituted by a concave groove 46b whose upper surface is opened.

  The width w1 of the concave groove 46b of the intermediate member 41 is set to a dimension corresponding to the width w2 of the insertion piece 26 in the middle in the width direction of the corner member 21.

  Although not shown, a protruding piece extending inward in the width direction and extending in the longitudinal direction may be provided at the upper end of the partition 47 so as to hold down the upper surface of the insertion piece 26 in the middle of the corner member 21 in the width direction.

  Even in the air filter frame 11 including the corner member 21 and the intermediate member 41 configured as described above, rigidity is obtained by the restriction piece portion 23, the restriction protrusion 28, and the auxiliary protrusion 29 in the corner member 21. The rigidity is obtained by the restriction piece 43 and the through hole 46 a having the partition 47. And the connection state without shakiness is obtained by the contact of the through-hole 46a and the auxiliary protrusion 29 and the fitting of the insertion piece 26 and the concave groove 46b in the middle in the width direction, and the same effect as described above can be obtained.

In correspondence between the configuration of the present invention and the configuration of the one aspect,
The inserted portion of the present invention corresponds to the inserted portion 46, the through hole 46a, the concave groove 46b,
Similarly,
The ridge corresponds to the partition 47 and the ridge 51,
The present invention is not limited to the above configuration, and other configurations can be adopted.

  For example, an auxiliary ridge that increases contact resistance in the inserted portion and an auxiliary ridge along the inserted portion may coexist.

  Moreover, you may form the control protrusion of a square member in the outer surface of an intermediate | middle board part.

DESCRIPTION OF SYMBOLS 11 ... Air filter frame 12 ... Air filter 13 ... Air filter unit 21 ... Square member 22 ... Intermediate | middle board part 23 ... Restriction piece part 24, 25 ... Contact part 26 ... Insertion piece 27 ... Gap 28 ... Restriction protrusion 28a ... This Contact end face 29 ... Auxiliary protrusion 30 ... Retaining protrusion 41 ... Intermediate member 42 ... Intermediate plate part 43 ... Restricting piece part 44, 45 ... Abutting part 46 ... Inserted part 46a ... Through hole 46b ... Concave groove 48 ... Engagement hole

Claims (7)

A corner member that holds a corner portion of the outer peripheral edge of the air filter; and an intermediate member that is detachably connected to the corner member so as to hold a corner portion of the outer peripheral edge of the air filter. An air filter frame surrounding the entire circumference of the filter,
The corner member and the intermediate member are formed of synthetic resin,
The square member and the intermediate member each include an intermediate plate portion that receives an end face of the air filter, and a restriction piece portion that is erected on an edge of the intermediate plate portion and holds the air filter on the intermediate plate portion.
At both ends of the connecting direction of the intermediate plate portion and the regulating piece portion, contact portions that are in surface contact with each other in the connected state of the corner member and the intermediate member are formed,
The contact portion of the intermediate plate portion of the corner member is formed with an insertion piece protruding in the connecting direction,
In the intermediate plate portion of the intermediate member, a inserted portion into which the insertion piece is inserted is formed,
An inner end surface or an outer surface of the intermediate plate portion of the corner member rises from the surface, extends in the connecting direction, and has a contact end surface that contacts the end surface of the intermediate plate portion of the intermediate member in a connected state with the intermediate member. An air filter frame in which a restriction protrusion is formed. A plurality of the insertion pieces are formed, and the regulation protrusion is formed at a position corresponding to a gap between them,
The regulating ridge extends over the entire abutting portion;
The air filter frame according to claim 1, wherein a protrusion that rises in the thickness direction and extends over the entire length is formed at a position corresponding to the restriction protrusion on the intermediate member. The air filter frame according to claim 1, wherein an auxiliary protrusion is formed in parallel with the restriction protrusion. The inserted portion has a shape surrounding the entire circumference of the insertion piece,
The air filter frame according to claim 3, wherein the auxiliary protrusions increase contact resistance in the inserted portion. The air filter frame according to claim 3 or 4, wherein the auxiliary protrusion is along the insertion portion. While the regulation protrusion is formed on the inner surface of the intermediate plate portion,
A retaining protrusion protruding downward is formed on the lower surface of the insertion piece,
The air according to any one of claims 1 to 5, wherein an engagement hole for releasably engaging the retaining projection is formed at a portion of the intermediate member corresponding to the retaining projection. Filter frame. The air filter unit provided with the air filter frame as described in any one of Claims 1-6.

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