JP2003024722A - Apparatus for producing filtration material for air filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for producing a filtration material for air filter which is capable of forming pleats of the filtration material with precise intervals of the outside folded parts and reliably fixing opposed beads formed between neighboring outside folded parts. SOLUTION: A conveyer to which a filtration material is fed from a pleating apparatus is intermittently operated so as to feed the filtration material by every prescribed transportation distance interlockingly with the folding operation of every one pitch of the pleating apparatus and thus fix opposed beads formed between neighboring outside folded parts of the pleats by proper pressing force and consequently, the intervals of the folded outside folded parts can be precisely formed as they are designed to be a prescribed value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a filter medium for an air filter, in which a resin bead is applied to the front and back surfaces of a sheet-shaped filter medium and pleated.

[0002]

2. Description of the Related Art For air filters for air conditioning and ventilation in buildings and factories, resin beads 2a, 2b are applied to the front and back surfaces of a sheet-like filter medium 1 such as a nonwoven fabric as shown in FIG. Processed air filter media is used.

As shown in FIG. 2, which is an embodiment of the present invention, an apparatus for manufacturing a filter medium for an air filter of this type has, for example, front and back surfaces of a sheet-shaped filter medium 1 provided with fold lines in a direction orthogonal to the feeding direction. The beads 2a, 2 along the feeding direction
The bead applicator 3 for applying b, the pleating machine 4 for folding the filter medium 1 coated with the beads 2a, 2b into pleats by one pitch along the fold line, and the folds for folding the pleated filter medium 1 The belt conveyor 5 conveys the sheet in the stacking direction and supplies it to the discharge end. The pleated filter medium 1 supplied to the discharge end is cut into a predetermined pleated length to obtain an air filter medium as shown in FIG.

A hot melt resin is often used as a material for the beads 2a and 2b. The hot melt resin of the filter medium 1 is supplied to the pleat processing machine 4 in a semi-molten state, and is fed onto the belt conveyor 5 while being folded into the pleat. The hot melt resin is solidified while the filter medium 1 is conveyed on the belt conveyor 5, and when the filter medium 1 is folded in the pleating machine 4, the beads 2a and 2b facing each other are fixed to each other, and a predetermined gap is formed between the pleats. Gaps are formed.

[0005]

As described above, in the manufacturing apparatus of the filter medium for the air filter, the resin beads forming the gap between the folds of the pleats are in a semi-molten state, and the filter medium is fed from the pleating machine onto the conveyor. Be done. For this reason,
If the conveyor convey speed is too slow, the beads that face each other between the folds of the pleats will be pressed excessively, and the beads will be flattened and the gap between the folds will become narrower.The air resistance and dust removal capacity of the air filter will be the designed values. There is a problem that it will not be the street. Further, if the convey speed of the conveyor is too fast, not only the gap between the folds of the pleats becomes too large, but also the beads are not firmly fixed to each other, and the filter medium may flutter during use of the air filter.

The proper transport speed of the conveyor varies not only with the size of the filter medium for the air filter, the number of beads, etc., depending on the lot, but also with the temperature difference due to seasonal changes. Conventionally, the transport speed of this conveyor is
Since the worker adjusts the gap between the folds of the pleats on the conveyor while monitoring the adjustment, it takes time and effort for this monitoring and adjustment, and the gap between the folds of the pleats easily varies.

Therefore, an object of the present invention is to provide an apparatus for manufacturing a filter medium for an air filter, which can form a gap between the fold ridges of the pleats of the filter medium with high precision and can firmly fix the beads facing each other between the fold ridges. Is.

[0008]

In order to solve the above problems, the present invention provides resin beads along the feeding direction on the front and back surfaces of a sheet-shaped filter medium having a crease line in the direction orthogonal to the feeding direction. A bead applicator to apply, and a pleat processing machine that folds the bead-applied filter medium into pleats along the crease line by 1 pitch by the upper and lower folding blades that cyclically advance and retreat. In an apparatus for producing a filter medium for an air filter, which comprises a conveyer which conveys the contained filter medium in a folding and stacking direction of pleats and supplies it to a discharge end, the conveyor is interlocked with a convolution operation of the pleating machine for each pitch. A configuration is adopted in which the machine is intermittently operated by a predetermined transport distance.

That is, the conveyor to which the filter material is fed from the pleat processing machine is interlocked with the convolution operation of the pleat processing machine for each pitch, and intermittently operated by a predetermined transport distance, so that the beads facing each other between the folds of the pleats are operated. The members are fixed to each other by receiving an appropriate pressing force, and the gap between the folds is accurately formed according to a predetermined design value.

The intermittent operation of the conveyor is performed because the pleating machine folds the filter material one pitch at a time and sends it to the conveyor, so that the operation of the conveyor matches the intermittent operation of the sending. This is to suppress the change in pressing force between the beads being fed.

As means for interlocking the intermittent operation of the conveyor with the operation of the pleating machine, the proximity switch detects the movement of one of the upper and lower folding blades or the elements constituting these drive systems, and the proximity switch A method of intermittently operating the conveyor based on a detection signal can be adopted.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows an example of a filter medium for an air filter manufactured by this manufacturing apparatus. As described above, this filter medium for an air filter is obtained by applying resin beads 2a and 2b on the front and back surfaces of a sheet-shaped filter medium 1 such as a non-woven fabric and pleating it.

As shown in FIG. 2, this air filter media manufacturing apparatus comprises beads 2a, 2b along the feed direction on the front and back surfaces of a sheet-like filter medium 1 having a crease line in a direction orthogonal to the feed direction. Bead coating machine 3 for coating
A pleating machine 4 that folds the filter media 1 coated with a and 2b into pleats along the fold line at a pitch, and a belt that conveys the folds of the filter media 1 in the fold direction of the pleats and supplies it to the discharge end. The belt conveyor 5 is provided with a controller 6 for controlling an intermittent operation described later.

The bead applicator 3 includes a feed roller 7
A plurality of winding rollers 9 around which the filter medium 1 with a crease line is wound are arranged between the feed roller 8 and the feeding roller 8 to form upper and lower three-layer paths for reversing and re-inverting the front and back surfaces of the filter medium 1. . The filter material 1 is a top-side route of the uppermost layer and a back-side route of the intermediate layer. The guns 10a and 10b respectively apply hot-melt resin as a bead material to the front and back sides along the feeding direction, and the bottom-side route faces the surface. The sheet is re-inverted to the pleating machine 4 by the delivery roller 8.

A plurality of the guns 10a, 10b are arranged in the width direction of the filter medium 1, and the beads 2 are formed on the front and back surfaces of the filter medium 1, respectively.
a and 2b are formed in a plurality of rows. A receiving roller 11 for the filter medium 1 is provided below each of the guns 10a and 10b. Further, an air fan 12 for promoting solidification of the beads 2a, 2b is provided at the exit of the route of the lowermost layer.
Although not shown, the delivery roller 8 and a part of the winding roller 9 are provided with grooves for allowing the applied resin beads 2a, 2b to escape.

As shown in FIGS. 3 and 4, the pleat processing machine 4 has a filter medium 1 fed from a feeding roller 13.
Is provided with upper and lower folding blades 14a and 14b that move forward and backward, and each of the folding blades 14a and 14b is formed in a comb shape in order to escape the beads 2a and 2b on the front and back surfaces of the filter medium 1. . Each of the folding blades 14a and 14b is rotatably pivotally attached to the tip end portions of a pair of left and right arms 15a and 15b that are vertically pivotable, and a link 16a that reciprocates back and forth on the side opposite to the pivot axis. , 16b.

Each of the arms 15a and 15b has a cam 17
While engaging with, pivots up and down with the base end as a fulcrum. The base ends of the links 16a and 16b are engaged with different cams (not shown) to reciprocate back and forth. Rotating shaft 1 of cam engaging with each link 16a, 16b
Gears 19a, 19b, and 19c are attached to the rotating shafts 18a and 18b of the cam 17 and the cams 8a and 18b, respectively, and the rotational force is transmitted from the motor 20 by meshing these gears. Therefore, each of the folding blades 14a and 14b tilts in the front-back direction and moves forward and backward from the top and bottom toward the front and back surfaces of the filter medium 1 to fold the filter medium 1 into pleats by one pitch.

A disk 21 is also attached to the rotary shaft 18b of the cam for tilting the lower folding blade 14b, and a detection projection 23 for a proximity switch 22 for operating the belt conveyor 5 described later is attached to the disk 21. It is provided. The controller 6 of the belt conveyor 5 starts the belt conveyor 5 based on the detection output of the proximity switch 22 and sends the conveyor belt 24 by a fixed distance by a built-in pulse counter. On the conveyor belt 24, a partition plate 25 for pressing the front end surface of the filter medium 1 folded in the pleats is placed.

Below, based on FIGS. 5 and 6, the folding operation of the filter medium 1 by the upper and lower folding blades 14a and 14b,
The intermittent operation timing of the belt conveyor 5 linked with this folding operation will be described.

FIG. 5 (a) shows a state in which the pleats have been convoluted for one pitch, and the upper folding blade 14a is at the bottom dead center.
The lower folding blades 14b stand upright at the top dead center to hold the filter medium 1 therebetween. First, after the upper folding blade 14a remains stopped, the lower folding blade 14b descends and temporarily retracts from the filter medium 1 (see FIG. 5).
(B)), rises while leaning forward (Fig. 5 (c)), and stands upright again at the top dead center to fold in a half pitch (Fig. 5 (d)). After this, this time, the lower folding blade 14b remains stopped, the upper folding blade 14a rises, and once retracts from the filter medium 1 (see FIG. 5).
(E)), descending while leaning forward (FIG. 5 (f)),
As shown in (a), it stands upright again at the bottom dead center to complete the convolution of the pleats for one pitch. By repeating the above operation, the filter medium 1 is pleated.

FIG. 6 shows the relationship between the operation of each of the above-mentioned folding blades 14a and 14b and the intermittent operation timing of the belt conveyor 5. The alphabetical symbols in the figure correspond to the positions of movement of the folding blades 14a and 14b shown in FIG. The detection protrusion 23 of the disc 21 passes through the front surface of the proximity switch 22 at the timing when the lower folding blade 14b starts descending from the state shown in FIG. 5A, and the proximity switch 22 activates the belt conveyor 5. Output a signal. The controller 6 of the belt conveyor 5 receives the signal from the proximity switch 22,
The conveyor belt 24 is fed by a pulse count corresponding to a preset one pitch length of the pleats of the filter medium 1.

Therefore, the filter medium 1 fed from the pleat processing machine 4 to the belt conveyor 5 for each pitch of the pleat is the beads 2a, 2 and 2 facing each other between the folds of the pleat.
b receives an appropriate pressing force and is fixed to each other, and the gap between the folds is formed accurately.

In the above-described embodiment, the proximity switch that outputs the start signal of the belt conveyor is arranged so as to face the rotating disk attached to the cam shaft that drives the folding blade, but the proximity switch directly changes the movement of the folding blade. Alternatively, it can be detected indirectly and is not limited to the arrangement position of the embodiment.

[0024]

As described above, according to the apparatus for manufacturing a filter medium for an air filter of the present invention, the conveyor to which the filter medium is fed from the pleating machine is interlocked with the fold operation of the pleating machine for every one pitch, and the predetermined operation is performed. Since the intermittent operation is performed by the transport distance, the beads facing each other between the fold ridges of the pleats can be fixed with an appropriate pressing force, and the gap between the fold ridges can be accurately formed according to a predetermined design value.

[Brief description of drawings]

FIG. 1 is a partially omitted external perspective view showing an example of a filter medium for an air filter.

FIG. 2 is a front view showing an embodiment of an apparatus for manufacturing a filter medium for an air filter.

FIG. 3 is a front view showing the pleat processing machine and the belt conveyor of FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5A to 5F are schematic front views each illustrating a folding operation of a folding blade.

FIG. 6 is a graph showing the relationship between the operation of the folding blade of FIG. 5 and the intermittent operation timing of the belt conveyor.

[Explanation of symbols]

1 filter media 2a, 2b beads 3 bead applicator 4 Pleated processing machine 5 Belt conveyor 6 controller 7 Feeding roller 8 Sending roller 9 Rolling roller 10a, 10b beads 11 Receiver roller 12 air fan 13 Feeding roller 14a, 14b Folding blade 15a, 15b arm 16a, 16b links 17 cam 18a, 18b, 18c rotating shaft 19a, 19b, 19c gears 20 motor 21 discs 22 Proximity switch 23 Detection protrusion 24 Conveyor belt 25 partition board

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shoji Miyoshi             1-12 Hirabayashi Minami, Suminoe-ku, Osaka             Inside the ceremony company Axie (72) Inventor Kazuo Abe             7 Hopte at 5025 Naruse, Machida, Tokyo             Click Co., Ltd. F-term (reference) 4D019 AA01 BD03 CA02 CB04 CB07                 4L047 EA22

Claims (2)

[Claims] 1. A bead applicator for applying a resin bead along the feed direction on the front and back surfaces of a sheet-shaped filter medium provided with a crease line in a direction orthogonal to the feed direction, and a filter medium coated with this bead. A pleating machine that folds the pleats one pitch at a time along the crease line by the upper and lower folding blades that cyclically move forward and backward on the front and back sides, and conveys this folded filter material in the fold direction of the pleats to the discharge end. In a manufacturing device of a filter medium for an air filter, which comprises a supply conveyor, the conveyor is intermittently operated by a predetermined transport distance in association with a convolution operation of the pleating machine for each pitch. Equipment for manufacturing filter media for air filters. 2. A means for interlocking the intermittent operation of the conveyor with the operation of a pleating machine detects the movement of the upper or lower folding blade or an element constituting these drive systems with a proximity switch, and the proximity switch 2. The apparatus for producing a filter medium for an air filter according to claim 1, wherein the conveyor is intermittently operated by the detection signal of the above.