JPH0819720A - Air filter - Google Patents

Abstract

PURPOSE:To make work of attaching reinforcing material easy and safe and to improve the strength of a filter medium end face by installing a rigid synthetic resin end face reinforcing frame which connects the roof part and the bottom board part of a filter frame inside the pleats end face of the filter medium and pleats end face of a folding part. CONSTITUTION:In a filter A, a filter frame 1 with the front side and the rear side opened is composed of a roof 2, a bottom board 3, and two side boards 4, and an accordion-shaped filter medium forming lots of pleats and a pleat filter medium 5 which is folded to make a wave shape are placed in the frame 1. In the pleat filter medium 5, two pleat end faces 5a are positioned on both right and left sides of the front surface of the filter frame 1, and more than one end face 5b of the folding part is installed respectively on the front face side and the rear face side of the filter frame 1. A hard synthetic resin end face reinforcing frame 6 which connects the roof 2 and the bottom board 3 is installed between the filter medium surface which forms the pleat end face 5a and the folding part end face 5b and the adjacent pleat surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air filter device used for purifying air in a room, a car, or the like.

[0002]

2. Description of the Related Art An air filter device in which a large number of pleats are formed on one filter medium, which are folded in an accordion shape, and which are further bent in a corrugated form, are housed in a filter frame whose front and rear surfaces are open. Is already known. In such an air filter device, the pleat end faces located at both ends of the accordion-shaped filter medium, and the pleat end faces exposed at the corrugated bent portions of the filter medium,
It is often arranged on the front side and the rear side of the device so as to be substantially parallel to the front and rear edges of the filter frame, that is, to face the inflow direction of air. Therefore, the end faces of these filter media are apt to be deformed or displaced due to the strong pressure of the inflowing air, and such deformation and displacement can be prevented only by fixing the upper and lower ends of the filter medium to the filter frame. Is difficult.

When the end surface of the filter medium is deformed or misaligned, not only the appearance is deteriorated but also the filtration efficiency and the life of the device are shortened. Attempts have been made to insert a reinforcing material. However, since the end surface of the filter medium is also a part that should have a filtering function for the inflowing air, it is not possible to use a reinforcing material that impairs the filtering function. Therefore, as the reinforcing material, a material obtained by cutting a material having a very high opening ratio, such as a net of fine metal wires or a thin metal plate having a large number of openings, in accordance with the width of the end surface of the filter medium is used. . After inserting such an end face reinforcing plate inside the end face of the filter medium, the filter medium is fixed to the filter frame.

[0004]

However, when the metal net or the perforated plate cut as described above is used as the end face reinforcing plate, it is difficult to leave it in the manufacturing process of the filter device and the use of the device. Problems arise. First, the work of inserting a metal net or a perforated plate cut into the inside of the end surface of the filter medium is complicated and dangerous. That is, the inside of the filter medium end face is an extremely narrow gap between the end face and the pleats adjacent to it.
On the other hand, a metal net or a perforated plate that has been cut has a sharp edge that is continuously formed at the cut edge.
Therefore, when the reinforcing material is inserted between the gaps of the filter material, it is extremely difficult to insert the reinforcing material smoothly and smoothly because the tip or edge of the reinforcing material is caught by the filter material. Not only that, but the reinforcing material is likely to break through the filter material and the worker is likely to injure his / her hand. The damaged filter medium can no longer be mounted on the filter frame, and the troublesome insertion work and the occurrence of injuries significantly reduce the work efficiency.

Further, even if the reinforcing material is inserted through such complicated and dangerous work, the mesh of the thin metal wire and the thin metal perforated plate are easily bent, so that the end surface of the filter material is deformed or displaced with respect to the wind pressure. The force to prevent the filter material is not sufficient, and in addition, when the end surface of the filter medium is subjected to an untimely impact during transportation or use of the device, the end surface often bends together with the reinforcing material. It tends to occur. Also, recently, it is becoming more important to dispose of used equipment easily, but when a metal reinforcement is used, the material is different from other parts of the equipment (usually synthetic resin). Therefore, there is a problem that the disposal processing of the entire apparatus becomes complicated.

The present invention avoids the above-mentioned drawbacks of the conventional filter device, makes it easy and safe to attach the reinforcing material, and has high strength of the end surface of the filter medium after manufacturing, and further, the manufacturing by the strength enhancement. It is an object of the present invention to provide an inexpensive filter device that does not cause an increase in cost.

[0007]

In the air filter of the present invention, a synthetic resin end face reinforcing frame fixed to the top plate and the bottom plate of the filter frame is disposed inside the end face or the bent end face of the filter medium. There is. That is, the air filter device according to the present invention includes a filter frame including a top plate portion, a bottom plate portion, and a side plate portion, and an open portion is formed on the front surface side and the rear surface side, and is housed in the filter frame. The pleated end of the accordion-shaped filter medium is formed into a corrugated filter medium, and the pleated end face of the filter medium and the bent pleat end face are located at the open portion of the filter frame, and the front face or the rear face of the filter frame. It is arranged facing each other, inside the pleat end face of the filter medium and the bent part pleat end face, a hard synthetic resin end face reinforcing frame that connects the top plate part and the bottom plate part of the filter frame is arranged. .

The end face reinforcing frame is integrally formed of a hard synthetic resin such as ABS resin. Its shape can be arbitrarily selected within the range of connecting the top plate and the bottom plate of the filter frame and not impeding the passage of filtered air, but in order to reinforce the end face and prevent the deterioration of the filtering function at the same time. Includes a plurality of columnar portions that connect the top plate and the bottom plate, and a plurality of connecting portions that horizontally connect the columnar portions, and has a shape having appropriate strength and a wide opening. It is desirable to do.

[0009]

In order to arrange the end face reinforcing frame inside the end face of the filter medium or the end face of the bent portion of the air filter device, after the pleated filter medium is bent and formed into an accordion shape, the end face or the bent portion end face and Insert the end face reinforcing frame between the pleats wall adjacent to the end face, and in that state, first fix one of the upper and lower ends of the filter medium and the end face reinforcing frame to the top plate or bottom plate of the filter frame with an adhesive. Then, by fixing the other of the upper and lower ends to the top plate or the bottom plate, both the filter medium and the end face reinforcing frame can be fixedly arranged in the filter frame at the same time. In the process of manufacturing in this way, when inserting the end face reinforcing frame into the filter medium, the edge of the end face reinforcing frame is a smooth columnar body made of hard synthetic resin, so the filter medium may be damaged or the operator's hand may be damaged. A sharp tip end portion that does not come off is not formed, and the insertion work can be performed efficiently and safely.

When the manufactured air filter device is used, the front and rear surfaces of the air filter device are bent inside the end faces of the filter media which are arranged so as to be orthogonal to the air inflow direction. Since the end face reinforcing frame having a strong resistance and a sufficiently wide opening is arranged,
There is no bending of the filter medium end face or displacement of the end face position due to wind pressure, and there is no hindrance to the air filtering action at the end face portion. Further, even if the filter medium end face is subjected to an untimely impact during transportation or use of the device, it is possible to prevent deformation or displacement due to the impact.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the filter device of the present invention will be described with reference to FIGS. Filter device A
Includes a top plate 2, a bottom plate 3, and two side plates 4 to form a filter frame 1 having an open front side and a rear side. Inside the filter frame 1, a large number of materials such as paper, cloth, and non-woven fabric are formed. An accordion-shaped filter medium having pleats formed therein and a pleated filter medium 5 having a corrugated shape as shown in FIG. 3 are further housed. The pleated filter medium 5 is arranged with two pleat end surfaces 5a located on both left and right sides of the front surface of the filter frame 1, and a plurality of bent end surfaces 5b located on the front surface side and the rear surface side of the filter frame 1, respectively. The upper and lower ends are respectively fixed to the top plate 2 and the bottom plate 3 with an adhesive. Of course, the end surface 5a may be arranged so as to be located on the back surface side.

As shown in FIGS. 2 and 3, a top plate 2 and a bottom plate 3 are respectively provided between the filter medium surface forming the pleat end surface 5a and the bent portion end surface 5b and the pleat surface adjacent thereto. An end face reinforcing frame 6 made of ABS resin to be connected is provided. The end face reinforcing frame 6 disposed inside the bent portion end face 5b has a shape shown in FIG. That is, 3
It is a ladder-shaped one in which a columnar portion 6a of a book and a plurality of coupling portions 6b that couple the columnar portions 6a are integrally molded. The upper and lower end portions 6d are fixed to the top plate 2 and the bottom plate 3, respectively. There is. Since the pleat end face 5a is narrower than the bent portion end face 5b, the end face reinforcing frame disposed inside thereof has two columnar portions 6a, and the other shapes are the bent end face 5b. It is the same as that arranged inside. When manufacturing this filter device, a frame body composed of the bottom plate 3 and the side plates 4, a pleated filter medium 5 bent in a corrugated form, and an end face reinforcing frame 6 are prepared, and the pleated end face 5a of the bent pleated filter medium 5 and The end face reinforcing frame 6 is inserted into the gap between the bent end face 5b and the pleated surface adjacent to them.
The lower end of the pleated filter medium 5 with the inserted state is fixed to the bottom plate 3 with an adhesive together with the lower end of the end face reinforcing frame 6, and then the top plate 2 is covered to fix the upper ends of the pleated filter medium and the end face reinforcing frame 6 to the top plate. By doing, it can be manufactured.

When the filter device A is used, the filter device A is attached to an air suction device (not shown),
As indicated by the arrow, air is introduced from the front side of the filter device A. The air enters the gap between the pleats of the pleated filter medium 5, passes through the filter medium, and flows out to the back side of the device. At this time, the wind pressure exerts a force on the end faces 5a and 5b of the pleated filter medium to bend or displace the end faces. However, since the end face reinforcing frame 6 is present, each end face is bent or displaced. Without doing so, it is possible to maintain the arrangement of the pleated filter medium in a good state, prevent the deterioration of the filtration function, and prolong the life of the apparatus.

[0014]

In the air filter device according to the present invention, since the end face reinforcing frame made of hard synthetic resin is arranged inside the pleat end face and the bent face end face of the filter medium, the wind pressure of the filtered air and the untimely condition are maintained. It is possible to prevent deformation and displacement of the end surface of the filter medium due to impact or the like, far better than the conventionally known reinforcing material without impairing the filtering function of the filter medium. Moreover, not only can it be manufactured at a lower cost than the conventionally known reinforcing material, but also the insertion work is much easier and the risk of damaging the filter medium and injuring a worker can be achieved. Furthermore, since it is possible to manufacture the entire device with synthetic resin material,
Disposal after use becomes easy.

[Brief description of drawings]

FIG. 1 is an external perspective view of an embodiment of an air filter device of the present invention.

FIG. 2 is a perspective view of the apparatus of FIG. 1 with a pleated filter medium removed (however, an end surface reinforcing frame provided on the rear surface side is not shown).

FIG. 3 is a top view showing a partial cross section of the device of FIG.

FIG. 4 is a view showing the shape of an end face reinforcing frame used in the device of FIG.

[Description of sign]

 A Air filter device 1 Filter frame 2 Top plate 3 Bottom plate 4 Side plate 5 Pleated filter medium 5a Pleated end face of filter medium 5b Bent end face of filter medium 5c Pleated alignment face (inflow side) 5d Pleated alignment face (outflow side) 6 End face reinforcement frame 6a Columnar part 6b Connection part 6c Frame edge

Claims (2)

[Claims] 1. A filter frame having a top plate part, a bottom plate part, and a side plate part, and having open portions formed on the front and rear surfaces thereof; and a plurality of pleats formed in the filter frame. An accordion-shaped filter medium having a corrugated filter medium and a pleated end face and a bent part pleated end face of the filter medium are arranged in the open portion of the filter frame, facing the front surface or the rear surface of the filter frame. An air filter device in which a hard synthetic resin end face reinforcing frame that connects the top plate part and the bottom plate part of the filter frame is arranged inside the pleat end face and the bent part pleat end face of the filter medium. 2. The air filter device according to claim 1, wherein the end face reinforcing frame is composed of a plurality of columnar portions and a plurality of connecting portions connecting the columnar portions.