JP5627425B2 - Detachment mechanism for air filter with frame - Google Patents

Description

  The present invention relates to an attachment / detachment mechanism for an air filter with a surrounding frame that can securely fix the position of the air filter with respect to a vent provided in an apparatus main body in an apparatus such as a draft chamber or a fume hood, or can be easily removed. Technology.

  Many devices, including draft chambers and fume hoods, are designed to exhaust the exhaust gas generated in the equipment body to the outside through the vents, and at that time an air filter is attached to the vents. The exhaust gas can be filtered and released.

  In this case, various attachment structures have been proposed for the attachment of the air filter to the vent of the device body. Among these, the end of the long bolt penetrated in the direction of the air passage through the through hole provided in the surrounding frame provided in the air filter is screwed to the equipment body side with a nut and attached, for example, As described in Patent Document 1, the rear end side of the enclosure provided in the air filter is rotatably attached to the apparatus main body side provided with the work space, and the finger is placed on the handle portion on the front side of the enclosure. For example, the work space can be detached from the work space while being rotated downward.

JP 2004-44934 A

  However, with the type in which the nut is screwed into the long bolt, it is difficult to adjust the tightening degree of the nut. Therefore, in order to prevent gas leakage, it takes time to install the air and There were inconveniences such as compelling work for attaching and detaching the filter.

  In addition, in the case of the air filter mounting structure disclosed in Patent Document 1, the entire structure is lifted under the state of rotating to the work space side by pulling down the handle portion of the surrounding frame provided in the air filter. In addition to having the trouble of having to replace the rotating shaft by removing it from the bracket and pulling it forward, there is also the problem that when replacing and re-installing, the troublesome procedure opposite to removal must be taken. It was.

  An object of the present invention is to provide an attachment / detachment mechanism for an air filter with a surrounding frame, in which the attachment / detachment of an air filter can be easily performed.

  The present invention has been made to achieve the above-described object, and is a surface that is provided in the partition wall portion of the apparatus main body and that substantially faces the air filter with a surrounding frame that is covered with a planar shape that is substantially rectangular. A compression shaft support unit disposed at a plurality of adjacent positions along one side edge of the vent hole having a shape, and each of the compression shaft support units is accompanied by an adjustment pressure that can be adjusted in the vertical direction at each end. A plurality of support arm portions that are provided with a length exceeding the other side edge at a position facing the one side edge of the vent hole by freely supporting the swinging, and its length A connecting bar for connecting the other end side of each of the support arm portions with a receiving piece portion that receives the opening surface direction of the vent hole at both ends in the direction, and is provided in the vicinity of the elastic support unit The air filter with a surrounding frame covered by the vent hole with the support pin as a fulcrum Enabling the pressing and urging of the receiving piece portions to the receiving surfaces when the supporting arm portions are positioned in a horizontal direction so as to prevent gas leaks and releasing them. The main feature is that it is composed of a pair of clamp bodies disposed on the partition wall near the side edge.

  In this case, the elastic shaft support unit includes a support body standing upright on the partition wall, an intervening lift piece loosely inserted in the support body, and the intermediate lift piece and a top end portion of the support body. It is preferable that a compression coil spring is disposed so as to be difficult to pull out, and the support arm portion pivotally supports each of the one end portions on the corresponding intervening lift piece. The clamp body preferably has a lever part for opening and closing operation and a pressing arm part that pushes down the receiving surface of the receiving piece part and maintains its position when the lever part is closed. be able to. Furthermore, it is preferable that the air filter with a surrounding frame uses a HEPA filter in which a packing is provided at a portion facing the peripheral edge of the vent hole.

  According to the present invention, the air filter with a surrounding frame is disposed so as to face and face the vent hole side of the partition wall, and then the pressing force generated by the clamp body is applied to the receiving surface of the receiving piece provided in the connecting bar. Thus, it is possible to press the surrounding frame side densely and evenly around the periphery of the vent hole with the support arm portion fixed in the horizontal direction via the support pin as a fulcrum. The air filter with a surrounding frame can be easily arranged on the apparatus main body side without being generated.

  In addition, when removing the air filter with a surrounding frame from the device body side, the support arm is swung in the flip-up direction via the support pin as a fulcrum by simply releasing the pressing force generated by the clamp body. By removing the pressing force acting on the side of the air filter with the surrounding frame, the air filter with the surrounding frame can be easily pulled out.

  In addition, when the elastic shaft support unit is composed of a support body, an intervening lifting piece, and a compression coil spring, a pressing force is reliably applied to one end side of the support arm portion by the elastic force of the compression coil spring. Can be made. Furthermore, when using a clamp body comprising a lever part for opening and closing operation and a pressing arm part that pushes down the receiving surface of the receiving piece part and maintains its position, simply opening and closing through the lever part, The air filter with a surrounding frame can be easily attached and detached, and the state at the time of attachment can be stably maintained. Furthermore, when the air filter with a surrounding frame is a HEPA filter with packing, the vent hole can be more reliably sealed through the packing at the time of attachment.

The top view which shows an example of this invention in the state which attached the air filter with a surrounding frame to the ventilation hole of the partition part in an apparatus main body. The fragmentary longitudinal cross-section in the AA arrow direction in FIG. It is explanatory drawing which shows the member structural example of the elastic support unit in this invention, (a) of them shows the exploded explanatory view seen from the side surface direction, (b) shows the exploded explanatory drawing seen from the front direction, respectively. It is a side view showing the movement of the present invention when attaching and detaching the air filter with a surrounding frame, of which (a) is a state where the position of the air filter with the surrounding frame is fixed so as to block the vent of the partition wall, (B) shows the state at the time of releasing the state of (a) and taking out the air filter with a surrounding frame, respectively.

  As shown in FIGS. 1 and 2, the present invention provides a surrounding frame that covers an air vent 103 provided in a partition wall 102 of an apparatus main body 101 in various apparatuses including a draft chamber and a fume hood. The attachment / detachment mechanism for the attached air filter 51 is provided, and a specific configuration example thereof is as follows.

  In other words, according to the illustrated example, the entire air filter attaching / detaching mechanism 11 with a surrounding frame is composed of a pair of elastic pressure support units 12, 12, and one end 23 side of the elastic pressure support unit 12 side. Necessary for fixing the two supporting arm portions 22, the connecting bar 32 integrally connecting the other end portions 27 of the supporting arm portions 22, and fixing and releasing the position with respect to the connecting bar 32 side. It is composed of a pair of clamp bodies 42, 42.

  Among these, each elastic support unit 12 is provided in the partition wall portion 102 of the apparatus main body 101 and has a surface shape that substantially faces the air filter 51 with a surrounding frame that is covered in a substantially square shape. Are arranged at a plurality of neighboring positions along one side edge 103a of the air vent 103.

  This will be described in detail with reference to FIGS. 3A and 3B. Each of the elastic shaft support units 12 is a support body 14 arranged upright via a support 13 fixedly positioned on the partition wall 102. And an intervening elevating piece 16 that is loosely inserted into the support body 14 and a compression coil spring 17 that is disposed between the intervening elevating piece 16 and the top end portion 14a of the support body 14 so as to be difficult to remove. It is prepared for.

  In this case, the intermediate lifting piece 16 and the compression coil spring 17 are fed into the support body 14 in which the male screw portion 15 is engraved at the top end portion 14a, and a washer 18 for holding the compression coil spring 17 from above is provided. After being arranged, for example, two nuts 19 used as lock nuts are screwed into the male threaded portion 15 so that the compression coil spring 17 is disposed so as to be difficult to remove.

  In addition, the degree of compression of the compression coil spring 17 can be adjusted by changing the screwing position of the two nuts 19 with respect to the male screw portion 15.

  On the other hand, the support arm portion 22 is pivotally supported on each of the elastic pressure support unit 12 sides so that the respective one end portions 23 can swing with the vertical elastic force, and the one side edge 103a of the vent 103 Are arranged in a two-piece configuration with a length exceeding the other side edge 103b at the opposite position.

  In this case, the one end portion 23 of each support arm portion 22 has a substantially U shape in a plan view provided with one side connecting piece 25 with a through hole 30 for holding the intervening lifting piece 16 from both sides and the other side connecting piece 26. It is formed as a connecting portion 24 to be presented, and the one side connecting piece 25 side is provided with a shaft support rod 28 which is fed through a through hole 21 provided in the intervening elevating piece 16 and is disposed inside the intervening elevating piece 16. The shaft support rod 28, which is fixed to the interposition lifting piece 16 in the same manner on the other connecting piece 25, is fixed to the interposition lifting piece 16 by the fixing material 29, so It is connected freely.

  Further, the other end portion 27 of each support arm portion 22 is integrally connected by a connecting bar 32. Moreover, the connecting bar 32 is formed with receiving piece portions 34 having a substantially L-shape in a side view as the receiving surface 35 in the direction of the opening surface of the vent 103 at both ends in the length direction.

  Moreover, on the inner side of the support body 14 on the upper surface 13 a of the abutment 13, support pins 20 for acting as a fulcrum with respect to the one end portion 23 side of the support arm portion 22 are arranged upright. In order to prevent gas leak from the air filter 51 with the surrounding frame covered by the vent hole 103, it is inserted through the support pin 20 in the horizontal direction at a position where it is pushed slightly against the urging force of the compression coil spring 17. It can be positioned. Note that the protruding length of the support pin 20 is an appropriate length that is determined in relation to the seat height of the surrounding frame 52 so that the supporting arm portion 22 is horizontal and can be uniformly pressed against the surrounding frame 52 of the surrounding air filter 51. It has become.

  The clamp body 42 is pushed in a little so as to prevent gas leakage from the air filter 51 with a surrounding frame covered by the vent hole 103 with the support pin 20 provided near the elastic shaft support unit 12 as a fulcrum. Each receiving surface of the receiving piece portion 33 is arranged on the partition wall portion 102 near the other side edge 103b of the air vent 103 so as to be able to press and release the pressure to the receiving surface 34.

  In this case, each clamp body 42 has a lever part 43 for opening and closing operation, and a pressing arm part 44 that pushes down the receiving surface 34 of the receiving piece part 33 and maintains the position when the lever part 43 is closed. What is formed and can be used suitably.

  In particular, when using what is also called a “toggle clamp” constructed using the principle of links and levers, a large stroke for opening and closing operations can be secured, and a large clamping force can be achieved with a small force. And the lock is not automatically released even when a reaction force is received from the device main body 101 side, and thus can be used more suitably.

  In addition, as the air filter 51 with a surrounding frame to which the present invention is applied, a structure in which a filter medium (not shown) having an appropriate structure is arranged in the surrounding frame 52 can be used. A HEPA filter 54 in which a packing 53 is provided at a portion facing the peripheral edge including the vicinity of the one side edge 103a and the vicinity of the other side edge 103b can be suitably used.

  Next, the operation and effect of the present invention having the above-described configuration will be described with reference to FIG. 4. When the air filter 51 with the surrounding frame is mounted in a state of covering the vent hole 103, FIG. As shown in a), the receiving surface 34 of the receiving piece portion 33 provided in the connecting bar 32 connecting the other end 27 side of the support arm portion 22 receives the pressing force generated by the clamp body 42. As a result of being forcibly pushed down to the horizontal direction of the height determined by the protruding length of the support pin 20 that is a fulcrum, the support arm portion 22 is also fixed in a horizontal state.

  In this case, the clamp body 42 includes a lever portion 43 for opening / closing operation, and a pressing arm portion 44 that pushes down the receiving surface 34 of the receiving piece portion 33 and maintains the position when the lever portion 43 is closed. In this case, the support arm portion 22 is brought into a horizontal state by closing the lever portion 43 while bringing the pressing arm portion 44 into contact with the receiving surface 34 while grasping and pushing up the connecting bar 32 side with fingers. And can be fixed easily.

  In addition, at this time, the one end portion 23 side of the support arm portion 22 acts like a lever with the support pin 20 as a fulcrum, and the intervening lift piece 16 and the compression coil spring 17 are pushed up against the urging force. As a result, the pressing force in the pressing-down direction by the compression coil spring 17 that is degenerated can be applied to the one end portion 23 side of the support arm portion 22. The entire part facing the peripheral part is strongly pressed.

  For this reason, the air filter 51 with the surrounding frame can be disposed in close contact with the peripheral edge portion of the air vent 103 by evenly pressing the surrounding frame 52 portion. Therefore, particularly when the packing 53 is attached to the surrounding frame 52. Can be arranged so as not to cause gas leakage by sealing the peripheral edge of the vent 103 through the packing 53.

  Further, when removing the air filter 51 with the surrounding frame arranged at the peripheral portion of the vent 103 from the necessity for replacement or the like, as shown in FIG. By releasing the pressing force by the clamp body 42 acting on the support 33, the pressing force in the pressing-down direction by the compression coil spring 17 always acting on the one end portion 23 side of the support arm portion 22 causes the support pin to The support arm portion 22 can be rocked so that the one end portion 23 of the support arm portion 22 is pushed down and the other end portion 27 side is flipped up.

  In this case, the clamp body 42 includes a lever portion 43 for opening / closing operation, and a pressing arm portion 44 that pushes down the receiving surface 34 of the receiving piece portion 33 and maintains the position when the lever portion 43 is closed. In this case, the support arm portion 22 can be easily released from the framed air filter 51 side simply by opening the lever portion 43 and retracting the pressing arm portion 44 from the receiving surface 34.

  As a result, the air filter 51 with the surrounding frame can be easily pulled out in the direction of the arrow shown in FIG. The necessary work can be smoothly performed.

  In addition, the air filter 51 with the surrounding frame after replacement or the like can be relocated to the state shown in FIG. 4 (a) very easily by following the procedure opposite to the above-described removal operation. can do.

  As described above, according to the present invention, the air filter 51 with the surrounding frame is disposed so as to face the vent 103 side of the partition wall 102 and the pressing force generated by the clamp body 42 is applied to the connecting bar 32. By acting on the receiving surface 34 of the receiving piece portion 33 included in the above, the surrounding frame 52 side of the vent hole 103 is placed under the state where the supporting arm portion 22 is fixed in the horizontal direction via the supporting pin 20 as a fulcrum. Since it can be pressed densely and evenly on the peripheral edge, the air filter 51 with the surrounding frame can be easily arranged on the apparatus main body 101 side without causing gas leakage.

  Further, when removing the air filter 51 with the surrounding frame from the device main body 101 side, the support arm portion 22 is flipped up via the support pin 20 as a fulcrum by simply releasing the pressing force generated by the clamp body 42. The air filter 51 with the surrounding frame can be easily pulled out by eliminating the pressing force that has been applied to the air filter 51 with the surrounding frame by swinging in the direction.

  Further, in the case where the elastic shaft support unit 12 is constituted by the support body 14, the intervening elevating piece 16, and the compression coil spring 17, the one end portion 23 side of the support arm portion 22 is caused by the elastic force of the compression coil spring 17. On the other hand, the pressing force can be reliably applied.

  Further, when using a clamp body 42 having an opening / closing operation lever portion 43 and a pressing arm portion 44 that pushes down the receiving surface 34 of the receiving piece portion 33 and maintains the position, the clamp body 42 is simply connected via the lever portion 43. By opening and closing, the air filter 51 with the surrounding frame can be easily attached and detached, and the state at the time of attachment can be stably maintained.

  Furthermore, when the air filter 51 with a surrounding frame is a HEPA filter with a packing 53, the vent 103 can be reliably sealed through the packing 53 under an excellent cleaning action when the air filter 51 is attached. .

  The above is the description of the present invention based on the illustrated examples, and the specific contents thereof are not limited thereto. For example, the elastic support unit 12 and the support arm portion 22 are arranged at two locations in the illustrated example, but are provided at three or more locations if necessary in relation to the surface size of the air filter 51 with a surrounding frame. It may be a thing. In addition to the illustrated example, the clamp body 42 may be an appropriate one having a structure capable of maintaining the state by applying a pressing force to the receiving surface 34 of the receiving piece portion 33. Further, the support body 14 and the support pins 20 may be directly upright from the partition wall 102 without using the support 13.

DESCRIPTION OF SYMBOLS 11 Attachment / detachment mechanism for air filters with surrounding frame 12 Elastic shaft support unit 13 Abutment 13a Upper surface 14 Supporting body 14a Upper end portion 15 Male screw portion 16 Intervening elevating piece 17 Compression coil spring 18 Washer 19 Nut 20 Support pin 21 Through hole 22 Support arm portion 23 One end portion 24 Connecting portion 25 One side connecting piece 26 Other side connecting piece 27 Other end portion 28 Shaft support 29 Fastening material 30 Through hole 32 Connecting bar 33 Receiving piece portion 34 Receiving surface 42 Clamp body 43 Lever portion 44 Pressing arm Part 51 Air filter with surrounding frame 52 Surrounding frame 53 Packing 54 HEPA filter 101 Main body 102 Partition part 103 Vent 103a One side edge 103b The other side edge

Claims (4)

A plurality of neighborhoods along one side edge of the air vent that is provided in the partition wall portion of the device body and has a surface shape substantially matching the air filter with an enclosing frame that is covered with a substantially square planar shape. A reciprocating support unit disposed at a position;
Each elastic shaft support unit is pivotally supported at its one end by swinging with an adjustable elastic force in the vertical direction, and the other side edge at a position facing the one side edge of the vent is provided. A plurality of supporting arm portions provided with a length exceeding the length; and
A connecting bar for connecting each other end side of the support arm portion with receiving piece portions serving as receiving surfaces on the opening surface direction of the vent holes at both ends in the length direction;
Each support arm is positioned in the horizontal direction by pushing in slightly so as to prevent gas leakage from the air filter with the surrounding frame covered by the vent hole, with a support pin attached near the elastic shaft support unit as a fulcrum. And a pair of clamps disposed on the partition wall near the other side edge to enable pressing and release of the receiving piece portions of the receiving piece portions to the respective receiving surfaces. An attachment / detachment mechanism for an air filter with a surrounding frame. The elastic shaft support unit is difficult to be removed between the support body standing upright on the partition wall, the intervening lift piece loosely inserted in the support body, and the interposition lift piece and the top end portion of the support body. A coil spring for compression disposed between
2. The attachment / detachment mechanism for an air filter with a surrounding frame according to claim 1, wherein the support arm portion pivotally supports each of the one end portions on the corresponding intervening lifting piece. The clamp body has a lever part for opening and closing operation, and a pressing arm part that pushes down the receiving surface of the receiving piece part and maintains the position when the lever part is closed. Air filter attachment / detachment mechanism with frame. The attachment / detachment mechanism for an air filter with an enclosure according to any one of claims 1 to 3, wherein the air filter with an enclosure is a HEPA filter provided with a packing at a portion facing a peripheral edge of the vent hole.

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