JP5554733B2 - Dust removal deodorization filter device - Google Patents

Description

  The present invention relates to a dust removal and deodorization filter device having dust removal performance and deodorization performance.

  A dust removal and deodorization filter device having dust removal performance and deodorization performance is attached to an air cleaning device or an exhaust passage of an electrophotographic apparatus for fixing toner. Such a deodorizing and deodorizing filter device has a substantially rectangular frame that allows air to pass from the opening on the front surface to the opening on the rear surface, and a dedusting filter is incorporated on the front surface side of the frame body and a deodorizing filter on the rear surface side. In many cases, these filters are integrally fixed to the frame body with an adhesive (see, for example, Patent Document 1).

JP 2000-153131 A

  In the dust removal deodorization filter device in which the dust removal filter and the deodorization filter are bonded and fixed to the frame body as described in Patent Document 1, when the performance of one of the dust removal filter and the deodorization filter is reduced and the lifetime is reached, It is necessary to replace the unit in which both filters and the frame are integrated. For this reason, the frame and the usable filter are also discarded together with the filter that has reached the end of its life, and there is a problem that the replacement cost is high and waste is generated in terms of resources.

  On the other hand, each filter is detachably incorporated into the frame body and can be replaced independently, so that when one filter reaches the end of its life, only that filter is replaced, and the frame body and the other filter are replaced. Can be used continuously.

  However, when each filter is detachably incorporated as described above, even if an airtight material is disposed between both filters, sufficient sealing performance cannot be secured due to deformation of the slow dust filter and the deodorizing filter, etc. Air may leak from between the two filters, and air that has not been gradually dusted or deodorized may be discharged to the outside.

  Then, this invention makes it a subject to make it possible to replace | exchange the dust removal filter and a deodorization filter each independently, ensuring the dust removal deodorization performance of a dust removal deodorization filter apparatus.

  In order to solve the above-described problems, the present invention is a frame that allows air to pass from an opening on the front surface to an opening on the rear surface, a dust filter that is incorporated on the front surface side of the frame body, and a rear surface side of the frame body. In the dust removal deodorization filter device including the deodorization filter, a stepped surface facing the front side is provided on the inner peripheral surface of the frame body over the entire circumference, and the dust filter is disposed on the periphery of the frame body over the entire circumference. A state in which the deodorizing filter is removably incorporated into the frame body in a state of facing the step surface, and the flange portion protruding from the front surface of the deodorizing filter is sandwiched between the step surface of the frame body and the peripheral portion of the rear surface of the dust filter And an airtight material is provided over the entire periphery between the peripheral portion of the rear surface of the dust filter and the flange portion of the deodorizing filter, and the dust filter is pressed toward the rear surface side of the frame body. means Provided, adopting a configuration sandwiching the flange portion of the deodorizing filter and the airtight material in the peripheral portion and the frame of the stepped surface of the rear surface of the dust filter.

  In other words, a dust filter and a deodorizing filter are detachably incorporated in the frame so that each filter can be replaced independently, and the dust filter is pressed toward the rear side of the frame, and the peripheral edge of the rear surface and the frame The gap between the airtight material and the deodorizing filter is sandwiched between the step surface provided on the inner peripheral surface of the filter, so that the seal between the two filters can be securely sealed, and odor-containing air does not leak from between the two filters. I did it.

  In the above configuration, as means for pressing the dust filter to the rear surface side of the frame body, a lid that engages with the frame body in a state of covering the peripheral edge of the front surface of the dust filter can be employed.

  Here, the frame body has a spring piece projecting from the edge of the spring housing hole opened in the side surface to the outside of the frame body, and the lid is formed in the engagement hole opened in the side surface. Is engaged with the frame body, the protrusion of the spring piece is pushed into the spring housing hole of the frame body on the side surface of the dust filter to engage the frame body with the lid. By providing a recess into which a part of the spring piece enters when releasing, it is possible to facilitate the operation of the spring piece when opening the lid for replacing each filter or the like.

  In addition, by providing a projecting portion projecting to the rear surface side of the frame body at the peripheral portion of the rear surface of the dust removing filter, the projecting portion bites into an airtight material and improves the sealing performance with the deodorizing filter. Can do.

  As the dust removal filter, if a frame material is pasted on the entire circumference of the side surface of the pleated filter medium and at least one peripheral portion of the front and back surfaces, the frame material is pasted only on the side surface of the pleated filter medium. The side surface of the dust removing filter is less deformed than the case, and the sealing property with the deodorizing filter can be ensured even under use conditions in which a large pressure loss occurs in the dust removing filter.

  The rear surface of the deodorizing filter is covered with a reinforcing wire mesh, a wire mesh holding portion is provided on the frame body to sandwich the vicinity of the periphery of the wire mesh, and the periphery of the wire mesh is bent outside the wire mesh holding portion. It is possible to effectively reinforce the deodorizing filter by securing its own rigidity, and it is possible to prevent deterioration of the sealing performance due to deformation of the deodorizing filter.

  As described above, the dust removal deodorization filter device of the present invention incorporates a dust removal filter and a deodorization filter in a detachable manner in the frame body, and is airtight between the peripheral edge of the rear surface of the dust removal filter and the stepped surface provided on the inner circumferential surface of the frame body. By sandwiching the collar part of the material and the deodorizing filter, it is possible to securely seal between the two filters, so the dust removal and deodorization performance equivalent to the conventional one with the dust removal filter and the deodorization filter bonded and fixed to the frame is fixed. In addition, the dust filter and the deodorizing filter can be replaced independently, and the frame can be used over a long period of time regardless of the lifetime of each filter. Therefore, the replacement cost when one of the two filters reaches the end of its life is small, and waste in terms of resources can be eliminated.

Exploded perspective view of the dust removal deodorizing filter device of the embodiment 1 is a longitudinal sectional view of the filter device of FIG. 1 is a longitudinal sectional view in the longitudinal direction of the filter device of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the dust removal deodorization filter device includes a frame 1 that allows air to pass from a front opening to a rear opening, a dust removal filter 2 that is detachably incorporated in the front side of the frame 1, and a frame 1. A deodorizing filter 3 that is detachably incorporated on the rear surface side, and is attached to an exhaust path of an electrophotographic apparatus that fixes toner, and collects toner and the like contained in the exhaust flowing in from the front by the dust removing filter 2. Odor is adsorbed by the deodorizing filter 3. The frame body 1 is provided with a frame-shaped lid 4 that covers the front surface of the dust filter 2 and a metal mesh 5 that covers the rear surface of the deodorization filter 3. A breathable sheet 6 is interposed between the deodorization filter 3 and the metal mesh 5. It is sandwiched.

  As shown in FIGS. 2 and 3, the frame 1 has a metal bar 8 having a substantially C-shaped cross section on the inner peripheral surface of a metal frame 7 whose outer shape is formed in a substantially rectangular shape. A step surface 10 that is attached with a rivet 9 and faces the front side is provided over the entire circumference. The outer shape of the frame 7 is slightly narrowed and is covered with the side surface of the lid 4 having the same outer dimensions and thickness as the rear surface side. Further, the end portion on the rear surface side of the frame 7 is bent into a substantially C-shaped cross section, and a wire mesh holding portion 11 that sandwiches the vicinity of the peripheral edge portion of the wire mesh 5 between the bent portion and the crosspiece 8 on the inner peripheral surface of the frame 7. Forming. In this embodiment, the frame 7 and the crosspiece 8 are formed by sheet metal processing, and caulking is performed between the frame 7 and the crosspiece 8 to prevent air leakage, but when formed by extrusion, Since the frame and the cross can be integrated, coking is unnecessary.

  The dust filter 2 is provided with a plurality of beads 13 in a direction perpendicular to the pleats by bending the filter medium 12 into a pleat shape and securing a gap between the pleats. A non-woven frame material 14 is attached to the peripheral edge. The filter medium 12 is made of glass fiber or non-woven fabric, and the bead 13 is made of a heat fusion resin (hot melt). Further, the frame member 14 is formed by winding a non-woven fabric wider than the width of the side surface of the filter medium 12 around the entire periphery of the side surface of the filter medium 12, and leaving a portion protruding from the rear surface of the filter medium 12 as a protruding portion 14 a that protrudes to the rear surface side of the frame body 1. The part that protrudes from the front surface of the filter medium 12 is bent so as to cover the peripheral edge of the front surface of the filter medium 12. An airtight material (gasket) 15 is attached to the bent portion 14 b of the frame member 14 so as to seal between the lid 4.

  In the deodorizing filter 3, a paper honeycomb core 17 formed in a honeycomb shape is disposed inside a non-woven box 16 having a front surface opened, and granular activated carbon 18 is partitioned in a space partitioned by the honeycomb core 17. And the opening of the box-like body 16 is closed with a non-woven lid sheet 19. The opening edge of the box-like body 16 is extended outward over the entire circumference, and the extended portion and the peripheral edge portion of the lid sheet 19 are bonded to form a flange portion 20 that projects from the front surface of the deodorizing filter 3. And the airtight material (gasket) 21 which seals between dust removal filter 2 (frame material protrusion part 14a) is affixed on the front surface of the collar part 20 (lid sheet 19 peripheral part).

  The lid 4 is attached to the frame body 1 with a hinge 22 at one end in the longitudinal direction, and opens and closes by rotating around the attachment portion as a fulcrum. The attachment position may be one end portion in the lateral direction. And when it closes, the spring piece 23 attached to the side surface of the frame 1 is fitted in the two engagement holes 4a opened on the side surface of the other end in the longitudinal direction, respectively, and covers the peripheral edge portion of the front surface of the dust filter 2 Is engaged with the frame 1 to press the dust filter 2 toward the rear side of the frame 1. By the action of the lid 4, the peripheral edge of the rear surface of the dust removing filter 2 and the stepped surface 10 of the frame body 1 sandwich the airtight member 21 and the flange 20 of the deodorizing filter 3, and the frame member protruding portion 14 a of the dust removing filter 2 The space between the dust removing filter 2 and the deodorizing filter 3 is sealed by biting into the airtight material 21.

  Here, the spring piece 23 of the frame body 1 protrudes from the edge of the spring housing hole 1a opened on the side surface of the frame body 1 to the outside of the frame body 1, and the projecting portion is pushed into the spring housing hole 1a. When the engagement between the frame body 1 and the lid 4 is released, a part of the frame body 1 enters the recess 2 a provided on the side surface of the dust filter 2. That is, the spring piece 23 is easily operated when the lid 4 is opened.

  A handle 24 is attached to the end face of the frame 1 on the spring piece 23 attachment side, and a tape 25 is attached to both ends of each filter 2, 3 to be pulled out from the frame 1. 3 can be easily replaced. Further, a non-woven fabric heat shielding material 26 is attached to the outer peripheral surface and front surface of the lid 4 and the outer peripheral surface and rear surface on the rear surface side of the frame body 1 so that the frame body 1 and the lid 4 are heated by passage of high-temperature exhaust gas. Even so, the operator can work with bare hands when replacing the filters 2 and 3.

  The wire mesh 5 is sandwiched in the vicinity of the peripheral edge portion by a metal mesh sandwiching portion 11 of the frame 1, and the peripheral portion is bent outside the wire mesh sandwiching portion 11. Thereby, the rigidity of the wire net 5 itself is increased, the deodorizing filter 3 can be effectively reinforced, and the deterioration of the sealing performance due to the deformation of the deodorizing filter 3 can be prevented.

  The breathable sheet 6 covers the rear surface of the box-shaped body 16 of the deodorizing filter 3 and collects fine powder of activated carbon 18 flowing out from the box-shaped body 16 so as not to be discharged to the outside.

  As described above, since the dust removing filter 2 and the deodorizing filter 3 are detachably incorporated in the frame 1, the dust removing deodorizing filter device can replace the dust removing filter 2 and the deodorizing filter 3 independently. 1 can also be used over a long period of time regardless of the lifetime of the filters 2 and 3.

  In addition, the airtight material 21 and the flange portion 20 of the deodorizing filter 3 are sandwiched between the peripheral edge portion of the rear surface of the dust removing filter 2 and the stepped surface 10 provided on the inner peripheral surface of the frame body 1, and the frame on the rear surface side of the dust removing filter 2. By allowing the material protruding portion 14a to bite into the airtight material 21, it is possible to reliably seal between the two filters 2 and 3, so that air containing odor does not leak from between the two filters 2 and 3, Dust removal and deodorization performance equivalent to that of a conventional filter with a filter attached to the frame can be obtained.

  Here, the dust filter 2 has the frame material 14 attached not only to the entire circumference of the side surface of the pleated filter medium 12 but also to the peripheral edge portion of the front surface, so that it is more than the case where the frame material is applied only to the side surface of the filter medium. The sealing property with the deodorizing filter 3 can be secured even under use conditions in which the side surface deformation is small and a large pressure loss occurs in the dust removal filter 2.

  In the above-described embodiment, the frame member 14 is attached to the peripheral portion of the side surface and the front surface of the filter medium 12 of the dust filter 2, but the frame member may be attached to the peripheral portion of the rear surface of the filter medium. In that case, the whole frame material affixed to the rear peripheral edge portion of the filter medium becomes a protruding portion that protrudes toward the rear surface side of the frame body and bites into the airtight material.

DESCRIPTION OF SYMBOLS 1 Frame 1a Spring accommodation hole 2 Dust removal filter 2a Recess 3 Deodorizing filter 4 Lid 4a Engagement hole 5 Metal mesh 6 Breathable sheet 10 Step surface 11 Metal mesh clamping part 12 Filter medium 14 Frame material 14a Projection part 14b Bending part 21 Airtight material (gasket)
23 Spring piece

Claims (6)

  In the dust removing deodorizing filter device, comprising: a frame body that allows air to pass from the opening on the front surface to the opening on the rear surface; a dust removing filter that is incorporated on the front surface side of the frame body; and a deodorizing filter that is incorporated on the rear surface side of the frame body. A stepped surface facing the front side is provided on the inner peripheral surface of the frame over the entire circumference, and the dust filter can be attached to and detached from the frame with the peripheral edge of the rear surface facing the stepped surface of the frame over the entire circumference. The deodorizing filter shall be incorporated in a detachable manner in the frame in a state in which the flange extending from the front surface is sandwiched between the step surface of the frame and the peripheral edge of the rear surface of the dust filter, An airtight material is provided over the entire periphery between the peripheral portion of the rear surface of the dust removing filter and the flange portion of the deodorizing filter, and a means for pressing the dust removing filter toward the rear surface side of the frame body is provided. A frame body of the step surface and at dust deodorizing filter apparatus, characterized in that as pinches the flange portion of the deodorizing filter and the airtight member.   The dust removing deodorizing filter according to claim 1, wherein the means for pressing the dust removing filter toward the rear surface side of the frame body is a lid that engages with the frame body in a state of covering a peripheral edge portion of the front surface of the dust removing filter. apparatus.   The frame body has a spring piece protruding from the edge of the spring housing hole opened on the side surface to the outside of the frame body, and the lid is fitted into the engagement hole opened on the side surface. A spring when the projection of the spring piece is pushed into the spring housing hole of the frame body to release the engagement between the frame body and the lid. The dust removing deodorizing filter device according to claim 2, wherein a concave portion into which a part of the piece enters is provided.   The dust removal deodorization filter device according to any one of claims 1 to 3, wherein a protrusion that protrudes toward the rear surface of the frame body is provided at a peripheral portion of the rear surface of the dust removal filter.   The dust removal filter according to any one of claims 1 to 4, wherein the dust removal filter has a frame member attached to at least one peripheral portion of a side surface and a front and rear surface of a pleated filter medium. Deodorizing filter device.   The rear surface of the deodorizing filter is covered with a reinforcing wire mesh, a wire mesh holding portion that sandwiches the vicinity of the periphery of the wire mesh is provided on the frame, and the periphery of the wire mesh is bent outside the wire mesh holding portion. The dust removal deodorizing filter device according to any one of claims 1 to 5.

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