JPH07241421A - Filter - Google Patents

Abstract

PURPOSE:To obtain a filter with good maintainability in which the deformation of a filter frame in the direction that disconnects it from a filter medium assembly is prevented by detaining the end part of a lath net and the filter frame by a detaining member. CONSTITUTION:After assembling a filter frame 3 to a filter medium assembly 10, a caulking process is applied to constitute detaining claws 15 being a detaining member. Therefore, working is easily performed. Further, by fitting plural fixing claws 15 in a net 12A of a lath net 12, the filter frame 13 and the filter medium assembly 10 are detained, and the end parts of both the lath nets 12 are detained to the filter frame 13. Therefore, by using a mesh 12A, the detaining structure of the filter frame 13 and the filter medium assembly 10 is more securely strengthened. Since tension is given to the filter medium assembly 10 between long side parts 13A, 13A being the opposite sides to each other, the filter medium assembly 10 is difficult to deform even when it receives strong pressure.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to filtration filters.

[0002]

2. Description of the Related Art In general, a filter of this type is generally formed by sandwiching a flat filter medium with a pair of lath nets, and reinforcing the periphery of the filter medium assembly with a filter frame. . The filter frame is made of a relatively soft metal material and has a U-shaped cross section. By fitting the end portion of the filter medium assembly into the U-shaped portion, the conventional filter frame covers the peripheral portion of the filter medium assembly.

In the above-mentioned conventional filter, the filter medium assembly is disposed in the fluid path during use,
The fluid passing through the passage is filtered, and at the time of maintenance, the filter frame is grasped to remove the filter medium assembly from the fluid passage for cleaning.

[0004]

SUMMARY OF THE INVENTION In the above conventional configuration,
Since the end of the filter medium assembly was simply fitted into the U-shaped portion to cover the peripheral portion of the filter medium assembly, when carrying or cleaning the filtration filter while holding the filter frame, There was a problem that the filter frame was deformed and the lath mesh came off and the filter medium could stick out.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a filtration filter having good maintainability.

[0006]

In order to solve the above-mentioned problems, the structure according to claim 1 of the present invention is arranged on both sides of the filter medium and a planar filter medium for collecting impurities in the passage of the fluid. Lath nets that form a plate-shaped filter media assembly together with the filter media, a filter frame that reinforces the periphery of the filter media assembly, and the ends of both lath nets are fixed to the filter frame. It is a filtration filter provided with a stop member.

According to a second aspect of the present invention, in the filtration filter according to the first aspect, the fixing member is a fixing claw that is raised from the filter frame and bites into the end portion of the lath net. Further, the configuration of claim 3 is the same as that of claim 2.
In the filtration filter described above, the lath net includes a large number of meshes, and the filter frame is provided with a plurality of retaining claws that can be fitted into the meshes during assembly.

Further, the structure of claim 4 is the same as that of claim 3.
In the filtration filter described above, the facing interval of the plurality of fixing claws is such that a shift dimension is added to a natural number times the facing pitch of the mesh of the lath net.

[0009]

According to the structure of the present invention, since the end portion of the lath net and the filter frame are fixed by the fixing member, the fixing member prevents the filter frame from being deformed in the direction away from the filter medium assembly. regulate. According to the configuration of claim 2,
After the filter frame is assembled to the filter medium assembly, a crimping step can be performed to form the fixing claw that serves as the fixing member.

Further, according to the structure of claim 3, by inserting a plurality of fixing claws into the mesh of the lath mesh,
The filter frame and the filter medium assembly can be fixed, and the ends of both lath nets can be fixed to the filter frame. Further, according to the configuration of the fourth aspect, since the facing interval of the plurality of retaining pawls is added with a displacement dimension that is a natural number multiple of the opposing pitch of the mesh of the lath net, the retaining pawl is fixed. Therefore, even if one fixing claw is displaced from the mesh, the other fixing claw can be surely fitted into the mesh due to the displacement size.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic view of a filtration filter according to an embodiment of the present invention, (A) is an external perspective view, and (B) is a sectional view. 2 is a front view showing a part of the filtration filter of FIG. 1 in a cutaway manner.

With reference to these figures, the filtration filter of the present embodiment is provided with a planar filter medium 11 for collecting impurities in the path of a predetermined fluid. The filter material 11 is formed by forming a thread-like metal material into a non-woven fabric and molding it into a rectangular surface shape. Various materials are selected according to the fluid, and specifications such as the outer shape and the density per unit area are set. Is set. As the fluid path, the air path of the air conditioner or the path of the humidifying water of the humidifier is optimal.

Next, a pair of lath nets 12 are arranged on both sides of the filter medium 11. The lath net 12 is a net material made of metal, and as shown in FIG. 1B, the filter medium 11 is sandwiched to form a pair, and together with the filter medium 11, a plate-shaped filter medium assembly 10 is formed. The lath net 12 of this embodiment includes a large number of meshes 12A arranged at a predetermined pitch along the longitudinal direction of the filter medium assembly 10 (see FIG. 2).

The periphery of the filter medium assembly 10 is reinforced by a filter frame 13. The filter frame 13 includes a pair of long side portions 13A extending along each long side of the filter medium assembly 10.
And a pair of short side portions 13B that are continuous with the long side portions 13A and extend along the short sides of the filter medium assembly 10 in an integrated manner. Each of the side portions 13A and 13B has a U-shaped cross section, and includes substrate portions A1 and B1 that cover the end faces of the filter medium assembly 10 and a pair of side plate portions A2 that are bent at right angles from the end portions of the substrate portions A1 and B1. , B2 are integrally provided.
The side portions 13A and 13B correspond to the substrate portions A1 and B1 and the pair of side plate portions A corresponding to the respective sides of the filter medium assembly 10.
The filter medium assembly 10 is fitted into the space defined by 2 and B2 to cover the periphery of the filter medium assembly 10.

Reference numeral 14 is a reinforcing bar, which is a filter medium assembly 10.
This is to prevent the swelling. Reinforcing bar 14
Are formed in a substantially N-shape as shown in the figure and are arranged on both sides of the filter medium assembly 10. The ends and bent portions of the filter medium assembly 1 are
It is fixed between 0 and the side plate portions A2 and B2. The reinforcing bar 14 can be omitted depending on the strength and area of the filter medium assembly 10.

Here, in this embodiment, a plurality of fixing claws 15 are formed on the side plate portion A2 constituting each long side portion 13A of the filter frame 13. As shown in FIG. 2, the retaining claws 15 are raised from the filter frame 13 and bite into the end portions of the lath net 12 so that the filter frame 13
On the other hand, a fixing member for fixing the ends of both lath nets 12 is configured.

In each side plate portion A2 in this embodiment, two fixing claws 15 are formed for each long side portion 13A. Each fixing claw 15 is formed with a width D that can be fitted into the mesh 12A, and one fixing claw 15 and the other fixing claw 15 are formed.
Are formed so as to correspond to the pitch of the meshes 12A, and are separated from each other by a facing interval P that can be fitted into the meshes 12A of the lath mesh 12.

When forming the retaining claws 15, after the filter frame 13 is attached to the filter medium assembly 10, the retaining claws 15 are cut and raised by a well-known press molding method or the like to form the retaining claws 15 in the lath net 12. The filter medium assembly 10 is fitted in the mesh 12A, and tension is applied to the filter medium assembly 10 between the long side portions 13A and 13A which are opposite sides to each other. According to the above configuration, since the end portion of the lath net 12 and the filter frame 13 are fixed by the fixing claw 15 as the fixing member, the filter frame 13 is deformed in the direction of coming off the filter medium assembly 10. Is fixed by the fixing claw 15.
Therefore, according to the present embodiment, when the filter frame 13 is carried or washed by the filter frame 13, the filter frame 13 is less likely to be deformed, so that the lath net 12 is prevented from coming off and the filter medium is surely prevented from protruding. can do.

In particular, in the configuration of this embodiment, the filter frame 1
After assembling 3 to the filter medium assembly 10, a crimping step can be performed to form the fixing claw 15 that serves as a fixing member. Therefore, there is an advantage that processing can be performed easily. Further, in the configuration of the present embodiment, the plurality of retaining claws 15 are fitted into the mesh 12A of the lath mesh 12 to secure the filter frame 13 and the filter medium assembly 10 to each other. The end of the lath net 12 can be fixed. Therefore, there is an advantage that the retaining structure between the filter frame 13 and the filter medium assembly 10 can be strengthened more reliably by using the mesh 12A.

Further, as described above, since tension is applied to the filter medium assembly 10 between the long side portions 13A, 13A which are opposite sides to each other, the filter medium assembly 10 is less likely to be deformed even when a strong pressure is applied. There is also an advantage. FIG. 3 is a schematic view of a filtration filter according to another embodiment of the present invention, (A) is an external perspective view, and (B) is a sectional view.

Referring to FIG. 3, in the embodiment of FIG. 3, the fixing claw 15 is omitted from the embodiment of FIG. 1 described above, and a pin 16 is used to form the fixing member. More specifically, the pin 16 serves as the long side portion 13A of the filter frame 13.
The filter medium assembly 10 and the side plate portion A2 are fastened together by being crimped through the side plate portion A2 that constitutes
During the co-fastening process, the pin 16 is fitted into the mesh 12A of the predetermined lath net 12 to apply tension to the filter medium assembly 10 between the long side portions 13A and 13A which are opposite sides of each other. Since the remaining part is the same as that of the embodiment of FIG. 1, the same reference numerals are given to the same members and the description thereof will be omitted.

Also in the embodiment shown in FIG. 3, since the end of the lath net 12 and the filter frame 13 are fixed by the pin 16, the filter frame 13 is prevented from being deformed in the direction away from the filter medium assembly 10. Pin 16 regulates. Therefore, FIG.
Also in this embodiment, when carrying or cleaning the filtration filter while holding the filter frame 13, the filter frame 13 is less likely to be deformed, and as a result, the lath net 12 can be reliably prevented from coming off and the filter medium protruding. it can.

Next, another embodiment shown in FIG. 4 will be described. FIG. 4 is a front view showing a still further part of the filtration filter of the present invention in a partially cutaway manner. Referring to the figure, the filter frame 13 of this filtration filter has a side plate portion A2.
Each is provided with three fixing claws 15. Among the fixing claws 15, a facing distance P between the middle one and those on both sides is P.
Reference numerals 1 and P2 are respectively obtained by adding a displacement dimension Pα (a half of the facing pitch 12B in the embodiment of FIG. 4) to a natural multiple of the facing pitch 12B of the mesh 12A. Deviation dimension Pα
May be set to any value as long as it is a fraction of the facing pitch 12B of the mesh 12A.

According to the structure shown in FIG. 4, since the facing intervals P1 and P2 of the plurality of fixing claws 15 are added with the displacement dimension Pα which is a natural multiple of the facing pitch 12B of the mesh 12A of the lath net 12. When the fixing claws 15 are fixed, even if one fixing claw 15 is displaced from the mesh 12A, the other fixing claws 15 can be reliably fitted into the mesh 12A by the displacement dimension Pα. Therefore, there is an advantage that a rigid connection structure that is easier to process can be obtained.

As described above, according to the above-described embodiment, it is possible to provide a filtration filter having good maintainability, which is a remarkable effect. The embodiment described above
However, the present invention is not limited to the above-mentioned embodiments, which are merely examples of preferred embodiments of the present invention. For example, as illustrated in the embodiment of FIG. 4, each fixing claw 15 may be two, three, or more, as long as it is plural. Further, all the fixing claws 15 do not necessarily have to be fitted in the mesh 12A. Depending on the material and strength of the lath net 12, a part or all of the retaining claw 15 may be dig into the wire rod portion of the lath net 12.

Needless to say, various design changes can be made without departing from the scope of the present invention.

[0027]

As described above, according to the first aspect of the present invention.
In the configuration described, the retaining member regulates the filter frame from deforming in the direction away from the filter medium assembly, so when carrying or cleaning the filtration filter while holding the filter frame,
As a result of the filter frame being less likely to be deformed, it is possible to reliably prevent the filter medium from coming off from the lath mesh.

In particular, according to the second aspect of the invention, after the filter frame is assembled to the filter medium assembly, the crimping step can be performed to form the fixing claw which serves as the fixing member. It has the advantage that it can be done easily. Further, according to the structure of claim 3, the filter frame and the filter medium assembly are fixed by fitting the plurality of retaining claws into the mesh of the lath net, and the both lath nets are fixed to the filter frame. Since the ends can be fixed, there is an advantage that the fixing structure between the filter frame and the filter medium assembly can be strengthened more reliably by utilizing the mesh.

Further, according to the structure of claim 4, when the fixing claws are fixed, even if one fixing claw is displaced from the mesh, the other fixing claws can be surely secured by the displacement size. Since it can be fitted into the mesh, there is an advantage that a rigid connection structure can be obtained which is easier to process.
Therefore, according to the present invention, it is possible to provide a filtration filter having good maintainability, which is a significant effect.

[Brief description of drawings]

FIG. 1 is a schematic view of a filtration filter according to an embodiment of the present invention, (A) is an external perspective view, and (B) is a sectional view.

FIG. 2 is a front view showing a part of the filtration filter of FIG. 1 in a cutaway manner.

FIG. 3 is a schematic view of a filtration filter according to another embodiment of the present invention, (A) is an external perspective view, and (B) is a sectional view.

FIG. 4 is a front view showing a part of another filtration filter of the present invention in a cutaway manner.

[Explanation of symbols]

 10 Filter Material Assembly 11 Filter Material 12 Lath Net 13 Filter Frame 15 Locking Claw (Locking Member) 16 Pin (Locking Member)

Claims (4)

[Claims] 1. A planar filter medium (11) for collecting impurities in a fluid path, and a filter medium (1) disposed on both sides of the filter medium (11) to form a pair.
With respect to the filter frame (13), a lath net (12) that forms a plate-shaped filter medium assembly (10) together with 1), a filter frame (13) that reinforces the periphery of the filter medium assembly (10), A filtration filter comprising: a retaining member (15, 16) for retaining the ends of both lath nets (12). 2. The filtration filter according to claim 1, wherein the retaining member is raised from the filter frame (13) and bites into an end portion of the lath net (12).
5). 3. The filtration filter according to claim 2, wherein the lath mesh (12) includes a large number of meshes, and the filter frame (13) has a plurality of retaining members that can be fitted into the meshes during assembly. It is provided with a claw (15). 4. The filtration filter according to claim 3, wherein the facing interval (P) of the plurality of retaining claws (15) is a natural number of the facing pitch (12B) of the mesh (12A) of the lath net (12). The doubled size is added with the shift dimension (Pα).