JP2011047603A - Mounting structure of filter outer frame - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure of a filter capable of dispensing with a specific tool to replace two or more kinds of filters, easily and surely mounting the filter to a fan box upstream-side face or a downstream-side face, and independently mounting the second filter even in a state that the first filter is mounted. <P>SOLUTION: In the mounting structure for mounting the filter outer frame to the fan box upstream-side face through the first filter, the second filter is insertable to the filter outer frame, a rotating lever and a hook vertically disposed on the rotating lever are disposed on a side face of the fan box, a hooked section is disposed on a frame piece of the filter outer frame in an extending state, the hook is engaged with the hooked section while keeping the rotating lever in an open state, after the first filter is disposed between the fan box upstream side face and the filter outer frame, and the rotating lever is rotated to pull the filter outer frame, thus fixing the filter outer frame. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an attachment structure for attaching two or more types of filters to an upstream side surface or a downstream side surface of a fan box, for example, in a clean room or the like in a hospital room or a food or semiconductor factory, a precision machine factory, or a chemical manufacturing factory. More specifically, the present invention relates to a filter mounting structure that can easily and reliably mount these filters on the upstream side or downstream side of a fan box without requiring a specific tool for replacing two or more types of filters.

  Conventionally, as the mounting structure 1 for mounting the filter on the downstream side surface of the fan box, as shown in FIG. 7, four to six bolt mounting holes 4 are formed on the downstream side surface of the fan box body 2 and the filter frame 3. Bolt mounting holes 5 and screwdriver insertion holes 6 are formed at positions corresponding to the respective bolt mounting holes 4 on the downstream side of the fan box body 2 on the upstream side and downstream side of the fan box body 2. By aligning the positions of the bolt mounting holes 4 and 5 of the filter frame 3 and inserting the connecting bolt screws 7 into these bolt mounting holes 4 and 5 and fastening them with a screwdriver, the filter is placed on the downstream side of the fan box. There was something that could be attached.

  However, in the mounting structure shown in FIG. 7, it is necessary to open the bolt mounting holes 4 and 5 and the screwdriver insertion holes 6 in the fan box body 2 and the filter frame 3 respectively. Cutting and positioning required considerable time and labor. Further, since the bolt screw 7 is tightened by human adjustment, the bolt screw tightening amount is not constant, and a gap may be formed between the packing 9 provided on the upstream side surface of the filter frame 3 and the downstream side surface of the fan box body 2. An air leak sometimes occurred.

  As another filter mounting structure 1, as shown in FIG. 8, a fastener 7 having a spring locking portion 8 provided corresponding to the cross-sectional shape of the filter frame 3 is provided on the downstream side surface of the fan box body 2. The filter frame 3 is fixedly attached to the downstream side surface of the fan box body 2 by pivotally installing and rotating the spring locking portion 8 of the stopper 7 and pushing it into the filter frame 3. There are also things.

  However, in the mounting structure shown in FIG. 8, while the filter frame 3 is pressed against the downstream side surface of the fan box body 2, the spring locking portion 8 of the stopper 7 must be rotated and pushed into the filter frame 3. It must be labor intensive. In particular, when the fan box main body 2 is installed on the ceiling surface, it is forced to work on its back for a long time. Therefore, if the spring force of the spring locking portion 8 is weakened so that the spring locking portion 8 can be pushed into the filter frame 3 with a light force, the adhesion of the filter frame 3 to the downstream side surface of the fan box main body 2 is improved. The gap is weakened, and a gap may be formed between the packing 9 provided on the upstream side of the filter frame 3 and the downstream side surface of the fan box body 2, and an air leak may occur.

  Therefore, as a technique for improving these filter mounting structures, the filter frame mounting structure of Patent Document 1 has been proposed by the present applicant. As shown in FIG. 9, this attachment structure is an attachment structure for attaching the filter frame 13 to the downstream side surface of the fan box body 12, and includes a rotating lever 14 installed on the downstream side surface of the fan box body 12. The hook 15 is suspended from the pivot lever 14, and the pivot lever 14 is opened, and the hook 15 is hooked on the filter frame 13 via the S-shaped bracket 16, and the pivot lever 14 is turned. This is a filter frame mounting structure in which the filter frame 13 is brought into close contact with the downstream side surface of the fan box body 12 by moving the filter frame 13 up. Here, the filter frame 13 is integrated with the folded filter F and is attached to the downstream side surface of the fan box main body 12.

  However, the mounting structure of Patent Document 1 has a structure in which only one filter frame 13 can be mounted. For example, when the filter F integrated with the filter frame 13 is a high-performance filter, In the case where a prefilter is installed in this and it is necessary to replace this prefilter from time to time, the structure cannot be handled.

  Further, a filter mounting structure disclosed in Patent Document 2 has also been proposed. As shown in FIG. 10, the mounting structure includes a chamber 4 containing a fan unit 3 including a fan 1 and a motor 2, and a filter 6 including at least one sheet disposed on the downstream side of the fan unit 3. And an elastic packing 5 inserted between the filter 6 and the chamber 4 and a fixing bracket 11 having a U-shaped cross section. The fixing bracket 11 is engaged with the surface of the chamber 4 at one end. A chamber retainer 8 that engages with the surface of the chamber 4, a protective member 13 provided on the chamber retainer 8 that engages the surface of the chamber 4, a filter retainer 10 that engages the filter frame 12 at the other end, and a side surface of the chamber 4. And a central plate portion 9 in contact with or close to the side surface of the filter 6, and the fixing metal fitting is provided between a C-shaped filter frame 12 provided on the side surface of the filter 6 and the surface of the chamber 4. Sandwiched in 1, a filter mounting structure formed by combining the filter 6 and the chamber 4. In FIG. 8, two filters 6 are stacked and attached to the chamber 4.

  As described above, in the mounting structure of Patent Document 2, the structure is such that two filters 6 can be mounted. However, when one of the two filters is to be replaced, Both need to be removed. For example, if one of the two is a high performance filter and a prefilter is installed in front of it, and it is necessary to replace the prefilter from time to time, both must be removed. Each time it is necessary to replace the packing 5 and accurately align the two filters, the structure requires extra time and labor. In the first place, when two types of filters are used in an overlapping manner, the lifespan of the two types of filters is not the same, and replacement work is required according to the filter with a short filtration life. When a filter with a short filtration life such as a prefilter is attached to the structure, there is a problem that it takes too much time and labor for the mounting work.

  Therefore, no special tools are required to replace two or more types of filters, and these filters can be easily and securely attached to the upstream side or downstream side of the fan box, and the second filter is equipped with the first filter. Therefore, there has been a demand for a filter mounting structure that can be mounted independently.

JP 2001-336815 A JP 2007-85576 A

  The present invention solves the above-described problem, and does not require a specific tool for replacing two or more types of filters, and can easily and reliably attach these filters to the upstream side or downstream side of the fan box. It is an object of the present invention to provide an attachment structure for a filter that can be attached independently even when the second filter is attached to the first filter.

Means for solving the above-mentioned problems are as follows.
An attachment structure for attaching the filter outer frame to the upstream side surface or downstream side surface of the fan box via the first filter,
A second filter can be inserted into the outer frame of the filter, and a rotation lever and a hook suspended from the rotation lever are installed on the upstream side surface or the downstream side surface of the fan box. The hooked part is extended to the frame piece of the frame,
After the first filter is disposed between the upstream side surface or the downstream side surface of the fan box and the filter outer frame, the rotary lever is opened, the hook is hooked on the hooked portion, and the rotary lever is rotated. The filter outer frame mounting structure, wherein the filter outer frame is fixed to the upstream side surface or the downstream side surface of the fan box via the first filter by moving the filter outer frame to attract the filter outer frame.
With this filter outer frame mounting structure, it is possible to easily and surely mount these filters on the upstream side surface or downstream side surface of the fan box without requiring a specific tool for replacing two or more types of filters. The filter can be provided with a filter mounting structure that can be mounted independently even with the first filter mounted.

  In the invention according to claim 2, the filter outer frame mounting structure according to claim 1, wherein the hooked portion is provided on two frame pieces facing each other so as to sandwich the side surface of the first filter. Thus, there is an advantage that the first filter can be accurately aligned and the alignment labor is reduced.

  In the invention which concerns on Claim 3, the 2nd filter is inserted in the said filter outer frame, It is the attachment structure of the filter outer frame of Claim 1 or 2 characterized by the above-mentioned.

  No special tools are required to replace two or more types of filters, and these filters can be easily and reliably attached to the upstream side or downstream side of the fan box, and the second filter remains attached to the first filter. However, it is possible to provide a filter mounting structure that can be mounted independently.

The attachment structure of this invention is shown, (a) shows the state which fixed the filter outer frame via the 1st filter to the upstream side surface of a fan box main body by rotating a rotation lever and attracting a filter outer frame. Perspective view. (B) is a perspective view which shows the state which inserted the 2nd filter in the filter outer frame further. The perspective view which shows the attachment structure of this invention and shows the arrangement | positioning order of a fan box main body, a 1st filter, a filter outer frame, and a 2nd filter. The attachment structure of this invention is shown, (a) is the perspective view which shows the state which arrange | positions a filter outer frame after setting the downstream side surface of a 1st filter in the upstream side surface of a fan box main body, and also makes a rotation lever open. Figure. (B) After the filter outer frame surface is installed on the upstream side surface of the first filter, the hook of the rotation lever is hooked on the hooked portion of the filter outer frame, and the rotation lever is rotated to rotate the filter outer frame. The perspective view which shows the state which fixed the filter outer frame via the 1st filter to the fan box upstream side surface by attracting. The attachment structure of this invention is shown, (a) is a perspective view which shows the state which inserts the inner frame piece of the upper part of a 2nd filter in a filter outer frame. (B) is a perspective view which shows the state which inserts the inner frame piece of the lower part of a 2nd filter, raising the inner frame piece of the upper part of a 2nd filter to upper part after that. The fragmentary sectional view which shows the attachment structure of this invention, and shows the state which hooked the hooked part of the filter outer frame with the rotation lever opened. The fragmentary sectional view which shows the attachment structure of this invention, and shows the state which fixed the filter outer frame via the 1st filter to the fan box upstream side surface or downstream side surface by rotating a rotation lever and attracting | sucking a filter outer frame . Sectional drawing which shows the conventional attachment structure. Sectional drawing which shows another example of the conventional attachment structure. Sectional drawing which shows another example of the conventional attachment structure. Sectional drawing which shows another example of the conventional attachment structure.

  Hereinafter, preferred embodiments of the filter outer frame mounting structure according to the present invention will be described in detail.

  The filter outer frame mounting structure 20 according to the present invention includes a first filter 30 on the upstream side surface 22 or the downstream side surface 22 of the fan box body 21 as illustrated in the perspective views of FIGS. An attachment structure for attaching the outer frame 40, wherein the second filter 50 can be inserted into the filter outer frame 40, and the rotation lever 24 and the rotation lever 24 are provided on the side surface 23 of the fan box body 21. A hook 25 suspended from the filter frame 40 is installed. A hooked portion 41 is extended from a frame piece 40a of the filter outer frame 40. The upstream side 22 or the downstream side 22 of the fan box body 21 and the filter After the first filter 30 is disposed between the outer frames 40, the rotating lever 24 is opened, the hook 25 is hooked on the hooked portion 41, and the rotating lever 24 is rotated. By attracting the filter outer frame 40, it is characterized in that the fan box the filter outer frame 40 on the upstream side 22 or downstream side 22 via the first filter 30 of the body 21 is to be fixed. Moreover, the perspective view of FIG.1 (b) has illustrated the state which inserted the 2nd filter 50 in the filter outer frame 40 in the form of Fig.1 (a).

  In the present invention, a duct may be connected to the fan box. In this case, the filter outer frame 40 is attached to the suction inlet side surface or the outlet side surface of the duct via the first filter 30. For this reason, the category of “upstream side or downstream side of the fan box” to which the filter outer frame 40 is mounted by the mounting structure 20 of the present invention includes, in addition to the fan box main body 21 (the upstream side surface 22 or the downstream side surface 22 thereof), Also included is a duct (an inlet side surface or an outlet side surface) connected to the upstream side or the downstream side of the fan box body.

  Moreover, it is selected according to the purpose whether the filter outer frame 40 is attached to the upstream side surface (suction port side surface) 22 or the downstream side surface (blower side surface) 22 of the fan box body 21 via the first filter 30. For example, in a hospital or the like, when air in a room where an infectious disease patient is stored is exhausted outside, or when air in a booth where an infectious disease patient is stored is exhausted indoors The filter outer frame 40 is attached to the upstream side surface 22 of the fan box body 21 via the first filter 30 as a medium-high performance filter or an ultra-high performance filter (HEPA or ULPA), and the filter outer frame 40 is used as a pre-filter. It is preferable to adopt a configuration in which the second filter 50 is inserted. In addition, for example, when external air contaminated with harmful gas is introduced into a room, the filter outer frame 40 is connected to the fan box via the first filter 30 as a gas removal filter carrying particulate matter having a gas removal function. It is preferable to adopt a configuration in which the second filter 50 as an after filter that is attached to the downstream side surface 22 of the main body 21 and removes crushed powder of particulate matter is inserted into the filter outer frame 40. In the present invention, since the utility value is considered to be particularly high in the former form, in the following description, “a form in which the filter outer frame 40 is attached to the upstream side surface 22 of the fan box main body 21 via the first filter 30”. This will be described as an example.

  In the filter outer frame mounting structure of the present invention, the fan box body 23, the first filter 30, the filter outer frame 40, and the second filter 50 are arranged in this order, as illustrated in the perspective view of FIG. Note that the first filter 30 may be one in which two types of framed filters are overlapped.

  In the example shown in FIGS. 1 and 2, the first filter 30 is integrated with the filter in which the filter frame 31 is folded, and the downstream side surface of the filter frame 31 is fixed to the upstream side surface 22 of the fan box body 21. It has become so. A packing 33 made of an elastic material such as rubber is preferably disposed on the downstream side surface of the filter frame 31. When the downstream side surface of the filter frame 31 is fixed to the upstream side surface 22 of the fan box body 21, this packing 33 is provided. Is interposed between the filter frame 31 and the fan box main body 21 to ensure airtightness. Further, a packing made of an elastic material such as rubber can be arranged on the upstream side surface 32 of the filter frame 31. When the filter outer frame 40 is fixed to the upstream side surface 32 of the filter frame 31, this packing is used. Is interposed between the downstream side surface of the filter outer frame 40 and the upstream side surface 32 of the filter frame 31 to ensure airtightness.

  In the example shown in FIGS. 1 and 2, the hooked portion 41 is extended to the two frame pieces 40 a facing the filter outer frame 40. Specifically, the hooked portion 41 is formed by bending a single metal plate so that the frame piece 40a and the hooked portion 41 are formed. A tip portion 41a is formed by bending. And this front-end | tip part 41a can be hooked on the hook 25 suspended by the rotation lever 24 mentioned later. In addition, it is preferable that the hooked portion 41 is provided on the two frame pieces 40a facing each other so as to come into contact with both side surfaces of the first filter 30 or through an inclusion such as packing. . With such a configuration, the positional displacement (lateral deviation in FIG. 2) of the first filter 30 can be reliably prevented by sandwiching the side surface of the first filter 30 by the two hooked portions 41. .

  Further, as illustrated in FIGS. 1B, 2 and 4, the filter outer frame 40 is formed so that the second filter 50 can be inserted therein. The second filter 50 includes the filter medium 51 and the filter. An inner frame 52 that reinforces the periphery of the filter medium 51 is formed. In the filter outer frame mounting structure of the present invention, the second filter 50 can be inserted into the filter outer frame 40 after the filter outer frame 40 is mounted to the upstream side surface of the fan box body 21 via the first filter 30. Is possible. It is also possible to attach the filter outer frame 40 to the upstream side surface of the fan box main body 21 via the first filter 30 after the second filter 50 is inserted into the filter outer frame 40 in advance.

  Four rotating levers 24 are provided on each side surface 23 of the fan box main body 21. In the example shown in FIGS. 1 and 2, the rotating lever 24 is provided on the upstream side of the side surface 23 of the fan box main body 21. Further, as illustrated in FIGS. 5 and 6, the rotation lever 24 is rotated via an installation plate 24 a fixed to the upstream side of the side surface 23 of the fan box body 21 by a screw bolt 24 d and a rotation shaft 24 b. Lever portion 24c. The installation position and the number of the rotation levers 24 are arbitrary, but in the example shown in FIGS. 1 and 2, the rotation levers 24 are installed on the upstream side of the opposite side surface 23 of the fan box main body 21 at intervals of two. .

  As illustrated in FIGS. 5 and 6, a hook 25 formed by bending a wire rod into a U-shape is suspended from the rotating lever 24. The hook 25 is attached to a position slightly apart from the rotation shaft 24b of the lever portion 24c, and the position of the tip (the U-shaped portion) moves up and down as the rotation lever 24 rotates. It has become.

  A combination of the hook 25 and the rotating lever 24 is a so-called “click lock”. The “click lock” is fixed by utilizing a shift between the rotation shaft 24 b serving as a fulcrum when the lever portion 24 c rotates and the attachment position 25 a of the hook 25. That is, in the opened state of FIG. 5, the mounting position 25a of the hook 25 is outside the rotating shaft 24b of the rotating lever 24, and in the fixed state of FIG. It is located on the inner side (fan box body 21 side) than the moving shaft 24b.

  Next, an example of a method for attaching the filter outer frame 40 will be described. As illustrated in FIG. 3A, the first filter 30 is stacked on the fan box body 21 so that the upstream side surface 22 of the fan box body 21 is aligned with the downstream side surface of the filter frame 31 of the first filter 30. . Next, the filter outer frame 40 is stacked on the filter frame 31 so that the upstream side surface 32 of the filter frame 31 covers the filter outer frame 40. At this time, the filter 41 is stacked so that the tip 41a of the hooked portion 41 of the filter outer frame 40 and the hook 25 suspended from the rotation lever 24 are aligned. In this way, the first filter 30 is disposed between the upstream side surface 22 of the fan box body 21 and the filter outer frame 40.

  Next, as illustrated in FIG. 3 (b), the rotary lever 24 provided on the side surface 23 of the fan box body 21 is opened and the hook 25 is hooked on the tip 41 a of the hooked portion 41. Next, the filter outer frame 40 can be fixed to the upstream side surface 22 of the fan box main body 21 via the first filter 30 by rotating the rotation lever 24 and attracting the filter outer frame 40. The first filter 30 and the filter outer frame 40 can be tightly fixed to the fan box main body 21. In this way, the filter outer frame mounting structure of the present invention can be formed.

  Next, the second filter 50 is prepared as illustrated in FIG. Next, the lower part of the second filter 50 is pushed toward the filter outer frame 40 while the upper part of the second filter 50 is inserted into the upper part of the filter outer frame 40. Next, as illustrated in FIG. 4B, the second filter 50 is lifted up, the lower part of the second filter 50 is inserted into the lower part of the filter outer frame 40, and the hand is released. Due to the weight of 50, the second filter 50 falls down, and the insertion of the second filter 50 is completed. In the present invention, such a saddle type is preferable. However, the method of inserting the second filter 50 is not particularly limited, and a method that does not require fixing with bolts or screws is particularly preferable.

  The filter outer frame mounting structure of the present invention is particularly preferably applied to a fan filter unit. For example, in a hospital or the like, when indoor air in which an infectious disease patient is stored is discharged to the outside, or an infectious disease patient When the air in the booth partitioned by a simple partition in which the filter is stored is discharged into the room, the filter outer frame 40 is passed through the first filter 30 as a medium-high performance filter or an ultra-high performance filter (HEPA or ULPA). Can be attached to the upstream side surface 22 of the fan box body 21 and a second filter 50 as a pre-filter can be inserted into the filter outer frame 40. In this case, it is possible to occasionally replace the second filter 50 that is particularly contaminated with the first filter 30 attached.

20 Filter outer frame mounting structure 21 Fan box body 22 Upstream side surface or downstream side surface 23 Fan box body side surface 24 Rotating lever 24a Installation plate 24b Rotating shaft 24c Lever portion 24d Screw bolt 25 Hook 30 First filter 31 Filter frame 32 Filter Upstream side 33 of frame packing 40 filter outer frame 40a frame piece 41 of filter outer frame hooked portion 41a tip of hooked portion 50 second filter 51 filter medium 52 inner frame for reinforcing the periphery of filter medium

Claims (3)

An attachment structure for attaching the filter outer frame to the upstream side surface or downstream side surface of the fan box via the first filter,
A second filter can be inserted into the filter outer frame, a rotation lever and a hook suspended from the rotation lever are installed on the side surface of the fan box, and the frame piece of the filter outer frame is covered. The latching part is extended,
After the first filter is disposed between the upstream side surface or the downstream side surface of the fan box and the filter outer frame, the rotary lever is opened, the hook is hooked on the hooked portion, and the rotary lever is rotated. The filter outer frame mounting structure, wherein the filter outer frame is fixed to the upstream side surface or the downstream side surface of the fan box via the first filter by moving the filter outer frame to attract the filter outer frame.   2. The filter outer frame mounting structure according to claim 1, wherein the hooked portion is provided on two frame pieces facing each other so as to sandwich the side surface of the first filter.   The filter outer frame mounting structure according to claim 1 or 2, wherein a second filter is inserted into the filter outer frame.

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