JP2018122223A - Filter device and filter pressing unit used for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability during filter replacement in a filter device which fixes a filter under pressing against a frame body on elastically deforming a leaf spring by moving a direct axial operation member in a longitudinal direction.SOLUTION: A filter device has a configuration where a rotary piece 7 is mounted on the guide rail 12 of a mount frame (frame body) 1 to be rotatable in a plane parallel with the axial direction of an operation member 5 to engage with an engagement piece 8 by rotating this rotary piece 7 to a predetermined rotation position, thereby causing the operation member 5 pressed by the rotary piece 7 via a projected piece 6 to move to a predetermined rotation position in a longitudinal direction, and a leaf spring 4 with one end part 4a fixed on the guide rail 12, and the other end part 4b coupled with the operation member 5 to elastically deform to fix the filter 2 under pressing against the mount frame 1. This configuration makes a force necessary to move the operation member 5 smaller than in the case of directly applying force to the operation member to facilitate filter replacement work.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a filter device in which a filter is incorporated in a frame body attached inside a duct or the like, and a filter pressing unit that presses and fixes the filter to the frame body.

  Air purifiers used for air conditioning and ventilation in buildings and factories are generally provided with a filter device that incorporates a filter in a frame such as a mounting frame that is attached to the inside (air passage) of a filter box or duct. On the other hand, by allowing the air to pass therethrough, foreign matter contained in the air is captured by a filter to clean the air. And in the filter apparatus, since filtration performance falls as the foreign material which the filter capture | acquired increases, in many cases, the filter was incorporated in the frame so that the filter could be replaced | exchanged regularly.

  By the way, in the filter device in which the filter is detachably incorporated in the frame body as described above, in order to ensure the filtration performance, the state where the peripheral edge portion of one surface of the filter is in close contact with the filter receiving surface of the frame body is maintained. There is a need. For this reason, conventionally, the filter is fixed to the filter receiving surface of the frame with screws, or the filter is pressed against the filter receiving surface of the frame with a spring fixed to the frame so as to face the other surface of the filter. Was.

  However, in the method using screws, it takes time to remove and tighten a large number of screws when attaching and detaching the filter, and the filter replacement work becomes troublesome. On the other hand, in the method using a fixed spring, when attaching or detaching the filter, the peripheral edge of the filter is press-fitted or pulled out between the filter receiving surface of the frame and the spring against the elastic force of the spring. Therefore, when an airtight material such as a gasket is attached to the peripheral edge of one surface of the filter, the airtight material is peeled off due to the sliding resistance generated between the filter receiving surface, and the repair work takes time. There is.

  On the other hand, the applicant of the present invention uses a filter pressing mechanism that presses the peripheral edge of one surface of the filter against the filter receiving surface of the frame, and between the peripheral edge of the other surface of the filter and the filter holding surface of the frame facing the filter. A leaf spring having an inclined portion extending in a direction inclined with respect to the other surface of the filter from one end portion fixed to the frame or the filter and a pressing portion formed on the other end side of the inclined portion, This leaf spring is elastically deformed by an operating member so that the angle formed by the inclined portion and the other surface of the filter is increased, and the pressing portion presses the other surface of the filter or the filter holding surface of the frame body. Patent Document 1). If this filter pressing mechanism is used, the filter can be replaced easily compared to the method of pressing and fixing the filter to the frame using screws or fixed springs, and the airtight material attached to the filter when the filter is attached or detached There is no risk of peeling.

Japanese Patent No. 5855301

  However, in the filter device employing the above-described filter pressing mechanism, when the filter is mounted on the frame body, the straight shaft-shaped operating member connected to the portion excluding one end of the leaf spring is moved in the longitudinal direction. Since the leaf spring is elastically deformed by this, depending on the specifications of the leaf spring and the amount of elastic deformation, a considerable force may be required to push and pull the operating member directly in the longitudinal direction. There was room for improvement in terms of workability during replacement.

  Therefore, an object of the present invention is to improve workability at the time of filter replacement in a filter device employing the above-described filter pressing mechanism.

  In order to solve the above problems, the present invention includes a filter, a frame in which the filter is incorporated, and a filter pressing mechanism that presses a peripheral edge of one surface of the filter against a filter receiving surface of the frame. The filter pressing mechanism is arranged between a peripheral edge portion of the other surface of the filter and a filter holding surface of the frame body opposed thereto, and is connected to the other surface of the filter from one end portion fixed to the frame body or the filter. A leaf spring having an inclined portion extending in a direction inclined with respect to the inclined portion, a pressing portion formed on the other end side of the inclined portion, and extending along the leaf spring and connected to a portion excluding one end portion of the leaf spring. A straight shaft-shaped operating member and a locking means for locking the operating member at a predetermined locking position, and when the operating member is moved in the longitudinal direction and locked at the locking position, The inclined portion of the leaf spring and the fin In the filter device in which the angle formed with the other surface of the filter is increased and the other surface of the filter or the filter holding surface of the frame body is pressed by the pressing portion of the leaf spring, the locking means includes the frame A rotating piece attached to the body or the filter so as to be rotatable in a plane parallel to the axial direction of the operating member, and a protrusion protruding from the outer peripheral surface of the operating member into the rotating track of the rotating piece A piece, an engaging piece that engages with the turning piece when the turning piece is at a predetermined turning position, and a direction in which the engaging piece is engaged with the turning piece at the turning position. The rotating piece is pushed by the rotating piece via the protruding piece and moved in the longitudinal direction when the rotating piece engages with the engaging piece at the rotating position. A configuration is adopted in which the operating member is locked at the locking position.

  That is, when the filter is mounted on the frame, the straight shaft-shaped operation member is moved to a predetermined engagement position by rotating the rotation piece from an initial position where the rotation piece is not engaged with the engagement piece to a predetermined rotation position. It can be locked by moving it in the longitudinal direction to the stop position, and when removing the filter from the frame, simply release the engagement between the rotating piece and the engaging piece against the elastic force of the biasing spring. The rotating piece and the operation member can be returned to their original positions by the elastic restoration of the leaf spring. According to this configuration, since the longitudinal movement of the operating member when the filter is mounted is performed by rotating the rotating piece, it is possible to use the lever principle as compared with the case where force is directly applied to the operating member. The required force becomes smaller. Further, even when the filter is removed, the engagement between the rotating piece and the engaging piece can be easily released with a small force.

  Furthermore, if a configuration is adopted in which a plurality of engaging portions with the engaging pieces of the rotating pieces are formed along the rotating direction and the operation member can be locked at a plurality of locking positions, a filter can be obtained. When the valve is replaced with one with a different thickness, or when an airtight material such as a gasket affixed to the filter is deteriorated over time, the size of the elastic deformation of the leaf spring is changed by changing the locking position of the operation member. By adjusting, the filter and the filter receiving surface can be brought into close contact with each other with an appropriate tightening strength, and the filtration performance can be ensured.

  Then, the filter pressing mechanism incorporated in the filter device described above and provided with the leaf spring, the operation member, and the locking means, and an attachment plate to which one end of the leaf spring is fixed and attached to the frame or the filter. Since the filter pressing unit of the present invention is highly versatile and can be incorporated into filter devices of various specifications, the production cost of the entire filter device can be reduced by incorporating this filter pressing unit.

  As described above, the filter device of the present invention rotates the rotating piece of the filter pressing mechanism when the filter is mounted, thereby pushing the protruding piece protruding from the operating member with the rotating piece to move the operating member in the longitudinal direction. Since the leaf spring connected to the operation member is elastically deformed and the filter is pressed and fixed to the frame body, compared to a configuration in which the operation member is moved in the longitudinal direction by directly pushing or pulling the operation member. Therefore, it is possible to work easily with a small force, and it is possible to improve workability when replacing the filter.

  In addition, the filter pressing unit of the present invention includes the above-described filter pressing mechanism and a frame or a mounting plate attached to the filter. Therefore, the filter pressing unit is incorporated into a filter device of various specifications, and the manufacturing cost of the entire filter device is Can be reduced, and it can be retrofitted to a ready-made filter device to improve the filtration performance of the filter device.

The disassembled perspective view of the filter apparatus of 1st Embodiment The disassembled perspective view of the principal part of the filter pressing mechanism of FIG. 1 is a cross-sectional plan view of the part where the filter pressing mechanism of FIG. 1 is installed, and b is a front sectional view of the guide rail of FIG. a and b are explanatory views of the filter mounting operation corresponding to FIG. Explanatory drawing of filter removal operation corresponding to Drawing 3 (a) and Drawing 4 (a) External appearance perspective view of the principal part of the filter integrated in the filter apparatus of 2nd Embodiment FIG. 6 is an external perspective view showing the filter pressing unit in FIG. 6 in an enlarged manner. 6 is a cross-sectional plan view of the filter pressing unit built-in portion of the filter device of FIG. The external appearance perspective view except the filter of the filter apparatus of 3rd Embodiment 9 is a cross-sectional plan view of the filter pressing unit built-in portion of the filter device of FIG. Front sectional view of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 show a first embodiment. As shown in FIG. 1, the filter device includes an attachment frame (frame body) 1 that allows air to pass from the front surface to the rear surface, and a filter 2 that is detachably incorporated into the attachment frame 1.

  The mounting frame 1 has a rectangular frame-shaped guide rail 12 fixed to the front surface of a flat plate-shaped mounting portion 11 having a rectangular opening, and the inner side of a filter box, a duct, etc. (not shown). It can be attached to the air passage. The guide rail 12 has an upper side portion and a lower side portion formed in a substantially J-shaped cross section, and both side portions formed in a band plate shape.

  When the filter 2 is attached to the mounting frame 1, the filter 2 is inclined to the rear side (see FIG. 1), and the upper edge portion is inserted from the front side of the mounting frame 1 into the upper side of the guide rail 12. Thereafter, the filter 2 is made parallel to the mounting frame 1 and the lower edge thereof is dropped into the lower side of the guide rail 12. Such a method of incorporating the filter 2 into the mounting frame 1 is generally called a Kendon type.

  A filter pressing mechanism 3 is provided on the inner side of the upper and lower sides of the guide rail 12 to press the peripheral portion of the rear surface (one surface) of the filter 2 against the front surface of the mounting portion 11 serving as the filter receiving surface 13 of the mounting frame 1. .

  The filter 2 is formed by covering the periphery of a filter medium 21 (see FIG. 3A) formed in a rectangular plate shape with a rectangular filter frame 22, and a reinforcing wire 23 on the front surface of the filter medium 21 on the rear surface. Are provided with reinforcing metal nets (not shown) so that the filter medium 21 does not fall out of the filter frame 22 when air passes through. A gasket 24 is attached to the outer surface of the rear side wall of the filter frame 22 so as to seal the space between the filter frame 22 and the filter receiving surface 13 of the mounting frame 1.

  As shown in FIG. 2 and FIGS. 3A and 3B, the filter pressing mechanism 3 includes a peripheral portion (front surface of the filter frame 22) of the front surface (other surface) of the filter 2 and an attachment frame 1 opposed thereto. A leaf spring 4 disposed between the upper and lower sides of the guide rail 12 serving as the filter holding surface 14 and having one end 4 a fixed to the filter holding surface 14, along the longitudinal direction of the leaf spring 4. Of the operation member 5 in a round bar shape (straight shaft shape) arranged so as to extend, a protruding piece 6 protruding from the outer periphery of the central portion in the axial direction of the operation member 5, and the upper and lower sides of the guide rail 12. A rotating piece 7 rotatably attached in a plane parallel to the axial direction, an engaging piece 8 engaged with the rotating piece 7, and an engaging piece 8 formed integrally with the engaging piece 8. The urging spring 9 that urges the rotating piece 7 in the direction of engagement and the operation member 5 guide the movement in the longitudinal direction. Consisting of the guide piece 10. Although only one leaf spring 4 is shown in FIGS. 2 and 3, the leaf springs 4 are actually arranged at two locations in the width direction of the mounting frame 1 (see FIG. 1).

  Each leaf spring 4 is convex toward the front surface of the filter 2 between one end portion 4 a fixed to the filter holding surface 14 of the mounting frame 1 and the other end portion 4 b extending perpendicularly to the front surface of the filter 2. A curved portion 4c is formed. The curved portion 4c includes an inclined portion extending in a direction inclined with respect to the front surface of the filter 2 from both end portions 4a and 4b, and a pressing portion that presses the front surface of the filter 2 between both inclined portions as will be described later. Further, long holes 4d and 4e and circular holes 4f through which the operation member 5 is passed are respectively provided at positions near both ends and the other end 4b of the bending portion 4c. And the long holes 4d and 4e of the curved part 4c are the same width as the outer diameter of the operation member 5, and are extended in the longitudinal direction of the leaf | plate spring 4, The position which passes the operation member 5 according to the elastic deformation of the curved part 4c The movement of the operation member 5 in the width direction of the leaf spring 4 is restricted, and the movement of the operation member 5 in the longitudinal direction is guided.

  The operating member 5 is provided with flanges 5a at two locations in the longitudinal direction. The flanges 5a are bonded to the peripheral edge of the circular hole 4f of the other end 4b of the leaf spring 4, whereby each leaf spring. 4 is connected. And the protrusion piece 6 provided in the outer peripheral surface of the operation member 5 protrudes in the rotation track | orbit of the rotation piece 7, and when the rotation piece 7 is rotated so that it may mention later, the rotation piece 7 protrudes. By pushing the piece 6, the operating member 5 moves in the longitudinal direction, and each leaf spring 4 is elastically deformed. In addition, a long hole 12a extending in the longitudinal direction of the operation member 5 and into which the distal end portion of the protruding piece 6 is inserted is provided on the front side wall of the upper and lower sides of the guide rail 12, and the long hole 12a protrudes. Since the piece 6 is restricted from rotating around the axis of the operation member 5, the operation member 5 smoothly moves in the longitudinal direction when the rotation piece 7 is rotated.

  The rotation piece 7 is formed in a band plate shape, and has an attachment hole 7a to the upper and lower sides of the guide rail 12 at one end and a knob 7b extending from the other end in the thickness direction. . In addition, a plurality of engagement holes (engagement portions) 7c are formed in the central portion in the longitudinal direction along the rotation direction, and an engagement piece 8 as described later in one of these engagement holes 7c. To engage. And it penetrates the slit 12b provided in the guide rail 12 with the attitude | position parallel to the front surface of the guide rail 12 as a whole, and one end part can rotate to the filter holding surface 14 (inner side surface of the guide rail 12) of the attachment frame 1 The other end side including the knob 7b is projected from the guide rail 12, and is rotated within a predetermined range.

  The engaging piece 8 has a hook shape in plan view and has a claw 8a inserted into the engaging hole 7c of the rotating piece 7, and is formed integrally with the biasing spring 9 as described above. . The urging spring 9 is formed by bending the belt plate at a predetermined angle at two locations in the longitudinal direction. One end of the urging spring 9 is fixed to the filter holding surface 14 of the mounting frame 1 and elastically deformed in a direction in which the bending angle increases. In this state, the claw 8 a of the engagement piece 8 extending in the thickness direction from the side edge of the other end is pressed against the filter holding surface 14. Then, when the rotating piece 7 moves from the initial position shown in FIG. 3 to a predetermined rotating position, the claw 8a of the engaging piece 8 fits into the engaging hole 7c of the rotating piece 7, and the engaging piece 8 And the rotating piece 7 are engaged with each other (see FIG. 4). Further, when the rotating piece 7 is engaged with the engaging piece 8, the operation member 5 pushed by the rotating piece 7 through the protruding piece 6 is also stopped. That is, a locking means for locking the operating member 5 at a predetermined locking position is constituted by the parts of the protruding piece 6, the rotating piece 7, the engaging piece 8 and the biasing spring 9 described above.

  Further, an L-shaped release portion 9a extending in the thickness direction from the side edge of the biasing spring 9 and bent in the width direction at the tip is provided at the center portion in the longitudinal direction of the biasing spring 9, and the release portion 9a is biased. By pushing against the elastic force of the spring 9 toward the filter 2, the engagement between the engaging piece 8 and the rotating piece 7 is released (see FIG. 5).

  Next, the filter attaching / detaching operation of the filter device will be described with reference to FIGS. When the filter 2 is mounted on the mounting frame 1, as described above, the upper edge of the filter 2 from the front side of the mounting frame 1 with the operation member 5 and the rotating piece 7 of the filter pressing mechanism 3 in the initial position. After the portion is inserted inside the upper side portion of the guide rail 12, the lower edge portion of the filter 2 is inserted inside the lower side portion of the guide rail 12. At this time, since the filter pressing mechanism 3 does not interfere with the filter 2, the filter 2 can be set on the mounting frame 1 smoothly.

  When the knob 7b of the rotating piece 7 of the filter pressing mechanism 3 is pinched with a finger from the state shown in FIG. 3, the rotating piece 7 is rotated to a predetermined rotating position, as shown in FIGS. As shown in FIG. 4, after the rotating piece 7 pushes the protruding piece 6 protruding into the rotating track, the operating member 5 integrated with the protruding piece 6 moves in the longitudinal direction. The claw 8a of the engagement piece 8 is fitted into one of the engagement holes 7c so that the engagement piece 8 and the rotation piece 7 are engaged, and at the same time, the operation member 5 is engaged at a predetermined locking position. Stopped.

  At this time, each leaf spring 4 of the filter pressing mechanism 3 has one end in which the other end portion 4b connected to the operation member 5 is fixed to the filter holding surface 14 of the mounting frame 1 as the operation member 5 moves in the longitudinal direction. Approaching the portion 4a, the bending of the bending portion 4c increases, and the front surface of the filter 2 is pressed by the bending portion 4c. That is, the leaf spring 4 is elastically deformed so that the angle formed between the inclined portion of the curved portion 4c and the front surface of the filter 2 increases, and the front surface of the filter frame 22 of the filter 2 is moved by the pressing portion between the two inclined portions. Press. Thereby, the filter 2 is fixed to the mounting frame 1 in a state where the gasket 24 provided on the rear surface of the filter frame 22 of the filter 2 is pressed against the filter receiving surface 13 of the mounting frame 1, and the mounting of the filter 2 is completed.

  On the other hand, when removing the filter 2 from the mounting frame 1, the release portion 9 a of the urging spring 9 is pushed toward the filter 2 against the elastic force of the urging spring 9 from the state of FIG. 4 as shown in FIG. 5. The claw 8a of the engagement piece 8 is caused to escape from the engagement hole 7c of the rotation piece 7. As a result, the engagement between the engaging piece 8 and the rotating piece 7 is released, and at the same time, the locked state of the operating member 5 is released, and the curved portion 4c of each leaf spring 4 is elastically restored and automatically restored. Since it returns to the state of FIG. 3, the pressing state of the filter 2 against the mounting frame 1 is also released. Then, what is necessary is just to take out the filter 2 from the attachment frame 1 by operation | movement reverse to the time of mounting | wearing.

  As described above, this filter device increases the curvature of the curved portion 4c of the leaf spring 4 of the filter pressing mechanism 3 so as to press the filter 2 against the filter receiving surface 13 of the mounting frame 1. The filter 2 can be easily replaced as compared with the case in which the filter is pressed and fixed using a fixed spring, and there is no possibility that the gasket 24 attached to the filter 2 is peeled off when the filter 2 is attached or detached.

  In addition, when the filter is mounted, the rotating piece 7 of the filter pressing mechanism 3 is rotated to push the protruding piece 6 protruding from the operating member 5 with the rotating piece 7 to move the operating member 5 in the longitudinal direction. Since the leaf spring 4 connected to the elastic member is elastically deformed, the lever principle can be used as compared with a configuration in which a force is directly applied to the operation member.

  Further, the rotating piece 7 is formed with a plurality of engaging holes 7c for engaging with the engaging pieces 8, and the operation member 5 can be locked at a plurality of locking positions. Therefore, the filter 2 including the gasket 24 is provided. When the gasket is replaced with one having a different thickness dimension, or when the gasket 24 deteriorates with time, the amount of bending of the bending portion 4c of the leaf spring 4 is adjusted by changing the locking position of the operation member 5. The filter 2 and the filter receiving surface 13 can be brought into close contact with each other with an appropriate tightening strength, and the filtration performance can be ensured.

  In the first embodiment described above, one end of the leaf spring 4 of the filter pressing mechanism 3 is fixed to the filter holding surface 14 of the mounting frame 1 and the front surface of the filter frame 22 of the filter 2 is pressed by the curved portion 4c. However, one end of the leaf spring 4 may be fixed to the front surface of the filter frame 22 and the filter holding surface 14 of the mounting frame 1 may be pressed by the curved portion 4c.

  6 to 8 show a second embodiment. In addition, the same code | symbol is attached | subjected to the member which has the same function as 1st Embodiment, and description is abbreviate | omitted (same also about 3rd Embodiment mentioned later). In the second embodiment, as shown in FIG. 6, a filter pressing unit 40 instead of the filter pressing mechanism 3 is fixed to the front surface of the filter frame 22 of the filter 2 of the first embodiment.

  As shown in FIG. 7, the filter pressing unit 40 includes a plate spring 4, an operation member 5, an engaging member 5 of the filter pressing mechanism 3 of the first embodiment, and one end 4 a of the plate spring 4. The mounting plate 41 attached to the second filter frame 22 is unitized. The mounting plate 41 is in the shape of a band plate, and one side edge portion thereof is bent to one surface side.

  Specifically, the two leaf springs 4 of the filter pressing mechanism 3 of the first embodiment, the urging spring 9 integral with the engagement piece 8 and the two guide pieces 10 are fixed to one surface side of the mounting plate 41, respectively. At the same time, the rotating piece 7 is rotatably attached, and the operation member 5 is connected to each leaf spring 4 through the long holes 4d and 4e of each leaf spring 4 and each guide piece 10 as in the first embodiment. ing.

  In addition, the mounting plate 41 is provided with a long hole 12a and a slit 41b that replace the long hole 12a and the slit 12b provided in the upper and lower sides of the guide rail 12 of the first embodiment. The tip of the protruding piece 6 protruding from the outer periphery of the member 5 is inserted, and the rotating piece 7 passes through the slit 41b.

The mounting plate 41 has a magnet tape 42 attached to the other surface thereof with a double-sided tape (not shown), and is attached to the steel filter frame 22 with the magnet tape 42. In addition, as a means for attaching the attachment plate 41 to the filter frame 22, it is also possible to employ sticking or welding with a double-sided tape or an adhesive.

  The filter attaching / detaching operation of the filter device of the second embodiment can be performed similarly to the first embodiment. That is, when the filter 2 is mounted, after the filter 2 is set to the attachment frame 1 by the Kendon type, the rotating piece 7 is moved to a predetermined rotating position. Then, as shown in FIG. 8, the operating member 5 integrated with the protruding piece 6 pushed by the rotating piece 7 moves in the longitudinal direction, the rotating piece 7 engages with the engaging piece 8, and the operating member 5 becomes predetermined. The curved portions 4c of the leaf springs 4 are bent at the locking positions, and the curved portions 4c press the inner side surfaces of the upper and lower sides of the guide rail 12. Thereby, the gasket 24 on the rear surface of the filter 2 is pressed against the filter receiving surface 13 of the mounting frame 1, and the filter 2 is fixed to the mounting frame 1.

  When removing the filter 2, the release portion 9 a of the urging spring 9 is pulled toward the guide rail 12 to release the engagement between the engagement piece 8 and the rotation piece 7. Then, the locked state of the operation member 5 is released at the same time, the curved portion 4c of each leaf spring 4 is elastically restored, and the pressing state of the filter 2 against the mounting frame 1 is also released. It can be taken out from the mounting frame 1 by the reverse operation.

By using the filter pressing unit 40 in which the filter pressing mechanism 3 is unitized with the mounting plate 41 as in the second embodiment, the assembly of the filter device is facilitated. Further, since the filter pressing unit 40 is highly versatile and can be incorporated into filter devices of various specifications, the manufacturing cost of the entire filter device can be reduced.

  Although the filter pressing unit 40 is attached to the filter frame 22 of the filter 2 in the second embodiment, it can also be attached to the attachment frame 1 (specifically, the upper and lower sides of the guide rail 12). In that case, the upper and lower sides of the guide rail 12 are formed in an L-shaped cross section, and the width of the bent portion of the mounting plate 41 of the filter pressing unit 40 is widened and fixed to the bent portion. If the front side walls of the upper and lower sides of the guide rail 12 are elastically sandwiched between the shaped mounting piece and the mounting plate 41, the filter pressing unit 40 can be easily attached to and detached from the mounting frame 1.

  9 to 11 show a third embodiment. As shown in FIG. 9, the filter device of this embodiment is a mounting frame 1 in which a U-shaped guide rail 12 whose left side is opened as viewed from the front is fixed to the rear surface of a mounting portion 11 having a rectangular opening. Is used to slide and set a filter (not shown) from the left side of the mounting frame 1 to the inside of the U-shape of the guide rail 12.

  The guide rail 12 is formed such that the upper side and the lower side are substantially L-shaped in cross section and the right side is formed in a strip shape, and the filter pressing unit 50 is fixed inside the upper side and the lower side. . Each filter pressing unit 50 is obtained by changing a part of the configuration of the filter pressing unit 40 of the second embodiment so as to be adapted to a slide type filter device.

  That is, in the filter pressing unit 50 of the third embodiment, the operating member 5 is engaged at a predetermined locking position so that an operator can operate from the left side of the mounting frame 1 when the filter is attached to and detached from the mounting frame 1. Locking means for stopping is provided in the vicinity of the left end in the longitudinal direction of the mounting plate 41, and a part of the shape of each part constituting the locking means is changed from the second embodiment.

  Specifically, as shown in FIGS. 10 and 11, the protruding piece 6, the rotating piece 7, the engaging piece 8, and the biasing spring 9 protruding from the outer periphery of the operation member 5 are located near the left end of the mounting plate 41. Along with this, the position of the long hole 41a of the mounting plate 41 into which the tip of the protruding piece 6 is inserted and the position of the slit 41b of the mounting plate 41 through which the rotating piece 7 passes are also changed. The rotating piece 7 is formed in a U-shape, and a pressing portion 7 d is formed in a portion protruding from the slit 41 b of the mounting plate 41 instead of the knob 7 b of the second embodiment. Further, the engaging piece 8 is formed with a claw 8a inserted into the engaging hole 7c of the rotating piece 7 at the central portion in the longitudinal direction, and instead of the releasing portion 9a of the biasing spring 9 of the second embodiment, A release portion 8 b that is tilted forward and backward with respect to the mounting plate 41 is formed so as to partially protrude from the left end of the mounting plate 41.

  The filter attaching / detaching operation in the filter device of the third embodiment is different from the second embodiment in the method of setting the filter 2 to the mounting frame 1 and the position where the operator operates the filter pressing unit 50, but the rest is basically the same. The same can be done as in the second embodiment. That is, when the filter 2 is mounted, as shown by the alternate long and short dash line in FIGS. 10 and 11, the pressing portion 7 d of the rotating piece 7 is pushed to move the rotating piece 7 to a predetermined rotating position. The operating member 5 integral with the protruding piece 6 pushed by the piece 7 moves in the longitudinal direction, the rotating piece 7 engages with the engaging piece 8 and the operating member 5 is locked at a predetermined locking position, The curvature of the curved portion 4c of each leaf spring 4 is increased, and the filter 2 can be pressed against the filter receiving surface 13 of the mounting frame 1 by the curved portion 4c.

  Further, when removing the filter 2, the release member 8 b of the engagement piece 8 is pulled toward the attachment portion 11 side of the attachment frame 1 to release the engagement between the engagement piece 8 and the rotating piece 7, thereby operating the operation member. 5 is released, the curved portion 4c of each leaf spring 4 is elastically restored, and the pressing state of the filter 2 against the mounting frame 1 is also released. It can be taken out from the frame 1.

In the third embodiment, since the filter pressing unit 50 having the same configuration as that of the second embodiment is used, the assembly of the slide type filter device is facilitated, and the manufacturing cost of the entire filter device can be reduced.

  The first and second embodiments described above are examples of a Kendon type filter device, and the third embodiment is an example of a slide type filter device. However, the present invention is applied to a casing (frame body) in which a filter is incorporated. Of course, the present invention can also be applied to a filter device that opens and closes an opening provided by a door.

  Further, the leaf spring of the filter pressing mechanism is not limited to the one in which the curved portion is formed between the one end portion and the other end portion as in each embodiment. For example, the other end portion 4b of the leaf spring 4 in the embodiment is eliminated. In the vicinity of the one end 4a, it is connected to the operation member 5, etc., and has an inclined portion extending in a direction inclined with respect to the other surface of the filter from the one end portion. When the angle formed between the inclined portion and the other surface of the filter is increased, the pressing portion formed on the other end side of the inclined portion presses the other surface of the filter or the filter holding surface of the frame. Anything is acceptable.

1 Mounting frame (frame)
2 Filter 3 Filter pressing mechanism 4 Leaf spring 4a One end 4b Other end 4c Bending portion 5 Operating member 6 Projection piece 7 Rotating piece 7b Knob 7c Engagement hole (engagement portion)
7d Pressing portion 8 Engaging piece 8a Claw 8b Release portion 9 Biasing spring 9a Release portion 10 Guide piece 11 Mounting portion 12 Guide rail 13 Filter receiving surface 14 Filter holding surface 21 Filter material 22 Filter frame 24 Gasket 40 Filter pressing unit 41 Mounting plate 50 Filter pressing unit

Claims (3)

A filter, a frame in which the filter is incorporated, and a filter pressing mechanism that presses a peripheral edge of one surface of the filter against a filter receiving surface of the frame,
The filter pressing mechanism is disposed between a peripheral edge portion of the other surface of the filter and a filter holding surface of the frame body opposed to the filter, and from one end fixed to the frame body or the filter to the other surface of the filter. A leaf spring having an inclined portion extending in a direction inclined with respect to the inclined portion, a pressing portion formed on the other end side of the inclined portion, and extending along the leaf spring and connected to a portion excluding one end portion of the leaf spring. A straight shaft-shaped operating member, and a locking means for locking the operating member at a predetermined locking position, and when the operating member is moved in the longitudinal direction and locked at the locking position, In the filter device in which the angle formed between the inclined portion of the leaf spring and the other surface of the filter is increased, and the other surface of the filter or the filter holding surface of the frame is pressed by the pressing portion of the leaf spring.
The locking means includes a rotating piece that is rotatably attached to the frame or the filter in a plane parallel to the axial direction of the operating member, and a rotating piece that rotates from the outer peripheral surface of the operating member. A projecting piece projecting into the moving track, an engaging piece that engages with the rotating piece when the rotating piece is in a predetermined rotating position, and the engaging piece being in the rotating position It consists of a biasing spring that biases in the direction of engaging the piece,
When the turning piece engages with the engaging piece at the turning position, the operation member that is pushed by the turning piece via the protruding piece and moves in the longitudinal direction is locked at the locking position. A filter device characterized by that.   The engagement portion of the rotation piece with the engagement piece is formed in a plurality along the rotation direction, and the operation member can be locked at a plurality of locking positions. The filter device as described.   A filter pressing mechanism that is incorporated in the filter device according to claim 1 or 2 and includes the leaf spring, an operation member, and a locking means, and one end of the leaf spring are fixed and attached to the frame or the filter. Filter pressing unit consisting of a mounting plate.

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