JP3138848B2 - Unit type filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a unit type filter which can be replaced by replacing only a filter material folded in a zigzag shape. More particularly, the present invention relates to a unit type filter in which the interval between the folds is maintained, the filter material can be easily replaced, and the filter material does not easily fall off the rigid frame once installed.

[0002]

2. Description of the Related Art
As a filter, there is a filter in which a filter material folded in a zigzag shape is fixed in a filter frame with an adhesive.

However, in the above filter, since the filter material and the filter frame are integrated, the filter material and the filter frame cannot be replaced separately.
Both the filter material and the filter frame had to be replaced at once.

On the other hand, there has been a filter in which a filter material is fixed to a filter frame by a fastener so that only the filter material can be replaced as needed.

However, in the case of the filter in which the filter material is fixed to the filter frame by the fastener, not only the cost is increased by the amount of the fastener but also the fastener is detached by the vibration or the like, and the filter material falls off the filter frame. There was a defect that would.

Therefore, the present inventor has proposed a unit type filter for solving such a problem in Japanese Utility Model Application No. 4-75669. As shown in FIG. 7, the unit type filter is a unit type filter 1 comprising a filter material 2 folded in a zigzag shape and a rigid frame 3 on which the filter material 2 is replaceably mounted. The folds at both ends of the filter material 2 are heat-sealed, and this heat-sealed portion is inserted between the ribs 6 provided at intervals on the outflow side of both side walls of the rigid frame 3 and the side walls of the rigid frame 3. The filter material 2 can be easily replaced, and when the filter material 2 is once mounted, the filter material 2 is separated from the rigid frame 3 by the thickness of the end of the filter material 2 and the wind pressure during use. There was a merit that it did not fall off easily.

However, in the case of this unit type filter, when the processing wind pressure is high or when the filter is used at high temperature, the filter material itself is deformed and closely attached to adjacent folds, and the pressure loss of the filter material is increased. There was a problem.

For this reason, the present inventor has proposed that even when the processing wind pressure is large or when the filter is used at high temperature, for example, a linear separator made of hot melt resin is provided on the surface of the filter material.
In order to prevent the adjacent folds from coming into close contact with each other, a study was made on maintaining an interval between the folds. As a result,
It was confirmed that the interval between the folds was reliably maintained by employing the linear separator made of the hot melt resin. In particular, hot-melt resin has adhesiveness (a gradual adhesiveness such that the resin adheres when pressed against each other and peels off easily when applied), so when this is used as a separator, the filter material is not easily displaced. It was found that it did not deform significantly.

However, both ends of this filter material are placed between the ribs provided on the outflow side of the both side walls of the rigid frame and the rigid frame side wall as proposed in Japanese Utility Model Application No. 4-75669. If you want to insert and attach to
The adhesiveness of the hot melt resin on the surface of the filter material increases resistance when the filter material end is inserted between the rib and the rigid frame side wall, resulting in a situation in which insertion is difficult or impossible. I was

The present invention has been made in view of such circumstances, and the folds adjacent to the filter material are folded so that they do not adhere to each other even when the processing wind pressure is large or when used at high temperatures. It is an object of the present invention to provide a unit type filter in which a mutual interval is maintained, the filter material can be easily replaced, and the filter material does not easily fall off a rigid frame once installed. Things.

[0011]

According to one aspect of the present invention, there is provided a unit comprising a filter material folded in a zigzag shape and a rigid frame on which the filter material is interchangeably mounted. A type filter, in which a separator for maintaining the interval between adjacent folds of the filter material is provided, and the fold of the end of the filter material is sandwiched by a sheet having a V-shaped cross section. A fold at the end of the filter material sandwiched between the V-shaped sheets is inserted between a rib provided at an outflow side of both side walls of the rigid frame and a side wall of the rigid frame. The unit type filter is the gist.

The gist of the invention according to claim 2 is a unit type filter characterized in that the fold at the end of the filter material and the V-shaped sheet sandwiching the fold are sealed and joined at the tip.

According to a third aspect of the invention, there is provided a unit-type filter in which a separator is provided by attaching a hot melt resin to the filter material in a linear manner.

According to a fourth aspect of the present invention, there is provided a folding line of a filter material.
The gist is a unit type filter characterized in that the end face in the direction is sealed by a seal member.

[0015]

In the unit type filter according to the first aspect, the fold of the filter material end is inserted between the rib provided on the outflow side of both side walls of the rigid frame and the rigid frame side wall. Once installed, the filter material does not easily fall off the rigid frame due to the thickness of the filter material end and the wind pressure during use.

Further, in this unit type filter,
In the filter material folded in a zigzag shape, the interval between adjacent folds is maintained by a separator provided in the filter material. Further, the fold at the end of the filter material is sandwiched between sheets having a V-shaped cross section, and the separator provided at the fold at the end of the filter material is also covered with the V-shaped sheet. When inserting the fold of the part between the ribs provided at intervals on the outflow side of the rigid frame both side walls and the rigid frame side wall, the separator provided on the filter material does not hinder and smooth insertion Is available.

In the unit type filter according to the second aspect, the fold at the end of the filter material and the V-shaped sheet sandwiching the fold are sealed and joined at the tip, and the end of the filter material is reinforced. Therefore, when the filter material is inserted between the rib and the rigid frame side wall, the end of the filter material is not deformed, and the insertion can be performed more smoothly.

In the unit type filter according to the third aspect, the interval between the folds of the filter material is maintained by a separator provided by applying a hot melt resin to the filter material in a linear manner. Because the hot-melt resin intervening between the folds fixes the mutual positions of the folds due to its adhesiveness, the wind pressure during use shifts the mutual positions of the folds of the filter material, narrowing the spacing. , So that it is not greatly deformed.

In the unit type filter according to the fourth aspect, since the end face in the fold line direction of the filter material is sealed by the seal member, the zigzag shape given to the filter material is not easily deformed during use or mounting. And the filter material can be easily handled as one replacement part.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The filter of the present invention will be described below in detail with reference to the drawings. The unit type filter 11 of the present invention has a
As shown in FIG. 2, the filter member 12 includes a filter member 12 folded in a zigzag shape, and a rigid frame 13 on which the filter member 12 is replaceably mounted. The filter material may be any material, such as nonwoven fabric and paper, which has been conventionally used as a filter material, as long as it has elongation and strength such that the shape after folding is not easily collapsed. Further, the filter material may be made of a single piece of nonwoven fabric or paper. The structure, such as paper or paper laminated, can be freely set according to the size and use of the filter.
It should be noted that even if the filter material is impregnated with a resin such as an ethylene-vinyl chloride copolymer, an ethylene-vinyl chloride-vinyl acetate copolymer, a vinyl chloride resin, or an acrylic resin, the shape after the folding process is reinforced. Good. In addition, electret processing for collecting dust by electrostatic force may be performed.

As a folding method, a zigzag shape is applied to the filter material by a pleating machine such as a reciprocating system or a rotary system, or the filter material is pressed by a pressing die (not shown) formed in a zigzag shape. Any conventionally known method such as imparting a zigzag shape to the filter material may be used. Thus, the separator is provided on the filter material provided with the zigzag shape.

Any separator can be used as long as it can maintain the interval between adjacent folds of the filter material. For example, a hot melt resin may be applied to the filter material in a linear form such as a continuous line, a fixed length line, a broken line, and a dotted line. Those provided by attaching, or woven fabrics also provided in a linear shape,
Filter material 1 for knitted fabric, felt, cardboard, synthetic resin plate, etc.
2 can be freely attached. In particular, in the case where the hot melt resin is provided by being attached, the adhesiveness of the hot melt resin (the resin adheres when pressed together,
When it is interposed between the folds as separators, the hot melt resin fixes the mutual position of the folds due to its adhesiveness, and it is used during use. The positions of the folds of the filter material are shifted from each other due to the wind pressure, so that the distance between the folds is not reduced or the filter material is not significantly deformed.

As shown in FIGS. 1, 2, 3, and 4, for example, the separator 14 made of the hot melt resin is provided on the front and back surfaces of the filter material 12 in a direction orthogonal to the zigzag fold line, that is, in a longitudinal direction. It can be provided by attaching a hot-melt resin linearly with a certain length at a certain interval. Then, the filter material 12 is folded so that the hot melt resin comes to the crest side of the fold, whereby the filter material 12 provided with the separator 14 can be obtained. As shown in FIG. 5, the separator 14 made of a hot melt resin may be provided by attaching the hot melt resin to the front and back surfaces of the filter material 12 in a dot-like manner at regular intervals in the longitudinal direction.

As shown in FIGS. 1 and 2, the filter material 12 is a folded sheet 15 having a V-shaped cross section.
It is sandwiched between. Therefore, the separator 14 provided at the fold at the end of the filter material 12 is also covered with the V-shaped sheet 15, and the fold at the end of the filter material 12 is removed.
Ribs 1 provided at intervals on the outflow side of both sides of rigid frame 13
6 and the rigid frame 13 can be smoothly inserted between the side walls. As the V-shaped sheet 15, a nonwoven fabric,
Ribs 16 and rigid frame 13 of rigid frame 13 such as paper and film
One having a strength that is not easily damaged when inserted between the side walls is used. Further, a film or the like having a smooth surface is desirable because resistance at the time of insertion becomes small.

As shown in FIGS. 1, 2 and 3,
Folds at both ends of this filter material 12 and V
It is also possible to seal and couple the mold sheet 15 at the tip. Thereby, the end of the filter material 12 is reinforced, so that when the end of the filter material 12 is inserted between the rib 16 and the side wall of the rigid frame 13, the end of the filter material 12 is not deformed. Smooth insertion is achieved.

That is, as shown in FIGS. 2 and 3, the sealed and joined tip portion is hard and thin. For this reason, it becomes possible to more smoothly insert into the gap formed between the rib 15 and the side walls of the rigid frame 13.
On the other hand, the thickness of the unsealed portion is as large as the thickness of the inside of the separator.
From the rigid frame 13 is prevented. In this case, as a sealing method, heat sealing, ultrasonic sealing, bonding means such as binder bonding can be used, but the tip is hard and thin, and the mechanical strength of the end of the filter material is increased. Heat sealing is preferred in that the effect of enabling smooth insertion is obtained. Also, the width of the part to be sealed is preferably 3 to 5 mm from the tip, and if it is longer than this range, the thickness of the unsealed part will not prevent the dropping and sufficient prevention of falling off. Insertion into the gap with the side wall of the rigid frame 13 becomes difficult.

The end face in the direction of the fold line of the filter material 12 is not air-permeable, such as nonwoven fabric or paper to which hot melt resin is adhered, nonwoven fabric or paper to which a film is adhered, resin sheet, or closed-cell foam. Alternatively, the sealing can be performed by a sealing member 17 made of a material having poor air permeability. Thereby, the zigzag shape given to the filter material 12 can be held so as not to be easily deformed at the time of use or mounting. Further, since the end face in the fold line direction of the filter material 12 is sealed, the periphery of the filter material 12 is surrounded by the V-shaped sheets 15 and the seal members 17 at both ends, so that the filter material 12 can be easily replaced as one replacement member. Be able to handle.

The rigid frame 13 has a certain rigidity so that it can withstand long-term use, and its shape can be freely set according to the shape and size of the filter device. Synthetic resin such as polypropylene, metal,
There is no particular limitation such as paper. As shown in FIG. 6, ribs 16 are provided on the outflow sides of both side walls of the rigid frame 13 at intervals.
Folds sandwiched between V-shaped sheets 15 at both ends of the filter material 12 are inserted into gaps between the side walls of the filter material 12. The longer the length of the rib 15 from the outflow side to the inflow side, the larger the amount of the end of the filter material 12 inserted between the side wall of the rigid frame 13 and the rib 16, and the filter material 12 falls off accordingly. The prevention effect will increase.

[0029]

According to the present invention, the above-mentioned structure is provided.
In the unit type filter described above, the fold at the end of the filter material is easily mounted by inserting the fold at the end of the rigid frame on both sides of the rigid frame between the ribs provided on the outflow side and the rigid frame side wall. Once the filter material is installed, the filter material does not easily fall off the rigid frame due to the thickness of the end of the filter material and the wind pressure during use. Excellent stability.

Further, in this unit type filter, the interval between the adjacent folds of the filter material is held by the separator provided on the filter material, so that even when the processing wind pressure is large or when the filter is used at high temperature. Since the folds do not adhere to each other and the pressure loss does not increase, the filter always has a stable filter function.

Also, in this unit type filter, the fold at the end of the filter material is sandwiched between V-shaped cross-section sheets, and the separator provided at the fold at the end of the filter material is also a V-type sheet. Since the filter material is covered, the separator provided on the filter material does not hinder when the folded fold at the end of the filter material is inserted between the rib and the rigid frame side wall for mounting. it can.

Further, in this unit type filter, since it can be handled only by the filter material, transportation and replacement work can be performed easily, and disposal processing is easy.

In the unit type filter according to the second aspect, the fold at the end of the filter material and the V
The mold sheet is sealed and joined at the tip, and the filter material end is reinforced, so that the filter material end is not deformed when inserted between the rib and the rigid frame side wall, Smooth insertion is achieved.

In the unit type filter according to the third aspect, the interval between the folds of the filter material is held by a separator provided by applying a hot melt resin to the filter material in a linear manner. The hot-melt resin interposed between the folds fixes the positions of the folds due to their adhesiveness. For this reason,
Due to the processing wind pressure and temperature during use, the positions of the folds of the filter material are not shifted, the gap is not narrowed or greatly deformed, the pressure loss does not increase, and there is always a stable filter function. are doing.

In this unit type filter, the interval between the folds of the filter material is maintained by a separator made of a hot melt resin, but the fold at the end of the filter material is a V-shaped sheet. Because it is sandwiched and covered, the hot melt resin at the end of the filter material
The resistance at the time of inserting the end portion of the filter material between the rib and the side wall of the rigid frame is increased, and smooth insertion and mounting can be performed without causing a situation that the insertion is difficult or impossible.

In the unit type filter according to the fourth aspect, since the end face in the fold line direction of the filter material is sealed by the seal member, the zigzag shape imparted to the filter material is not easily deformed during use or mounting. In addition, the filter material can be easily handled as one replacement part, and replacement with a rigid frame can be easily performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a filter material is mounted on a rigid frame.

FIG. 2 is a plan view partially cut away.

FIG. 3 is an enlarged sectional view of a main part of a filter material.

FIG. 4 is a front view of the same filter material.

FIG. 5 is a plan view showing another embodiment of the filter material.

FIG. 6 is a perspective view showing a rigid frame.

FIG. 7 is a plan view showing a conventional unit-type filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 ... Filter material 13 ... Rigid frame 14 ... Separator 15 ... V-shaped sheet 16 ... Rib 17 ... Seal member

Claims (4)

(57) [Claims] 1. A unit type filter comprising a filter material folded in a zigzag shape and a rigid frame on which the filter material is replaceably mounted, wherein a gap between the folded folds adjacent to the filter material is maintained. And a fold at the end of the filter material is sandwiched between V-shaped sheets, and the fold at the end of the filter material sandwiched between the V-shaped sheets is provided on both sides of the rigid frame. A unit type filter which is inserted between a rib provided at an outflow side of a wall at an interval and a rigid frame side wall. 2. The unit-type filter according to claim 1, wherein the fold at the end of the filter material and the V-shaped sheet sandwiching the fold are sealed and joined at the tip. 3. The unit-type filter according to claim 1, wherein the separator is provided by attaching a hot melt resin to the filter material in a linear manner. 4. The unit-type filter according to claim 1, wherein an end face in the fold line direction of the filter material is sealed by a seal member.