JPH0753205B2 - Filter paper forming equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter paper forming apparatus, and more particularly, to an apparatus for forming a fold filter paper having ridges and valleys into a circular shape.

2. Description of the Related Art At present, filter papers that separate and remove solid particles from liquids and solids are used in a wide range of technical fields. Such filter paper is made of various materials to suit the purpose of use,
Moreover, it is formed in various shapes. In general, industrial filter paper is used as a filtering device after being formed into a predetermined shape and then housed in a container. In a filter device used as an air filter for an automobile engine, the filter paper must always be formed in a circular shape as a filter element. Conventionally manufactured filter elements are formed into a predetermined shape and then, when housed in a container, cut a linearly formed fold-shaped filter paper into a predetermined length, and then cut the cut portion of each filter paper. It is adhered to form a circular shape and housed in a filter case.

In a conventional apparatus for forming a filter paper having a large number of folds, for example, as shown in Japanese Patent Publication No. Sho 57-7806, two mark forming rollers for forming a folding line on the filter paper and these mark forming rollers are provided. Two facing rollers facing each other and pressed from opposite sides of the strip, and two drive rollers arranged behind the marking roller and moving the strip.
A guide path is provided at the rear of these drive rollers and has two smooth surfaces that gradually converge in the traveling direction, and a large number of guide ribs that are provided on the two converging surfaces and that are high in the traveling direction. .

Further, Japanese Patent Laid-Open No. 61-292015 discloses that a crest at one end of a fold portion of a filter element is closed to open a valley, and a ridge at the other end of the fold is opened. Thus, the trough is closed to allow the fluid to flow not only from the upper surface of the fold portion of the filter element but also from one end thereof and flow out to the lower surface of the fold portion and the other end. With this filter element, it is possible to secure a wide fluid passage surface inside and outside the filter element, and moreover, the fluid flows along the folds of the filter element, and also flows diagonally in each fold of the folds, and There is no sudden change in. Therefore, the flow resistance of the fluid can be reduced.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, since the filter element formed by the above-mentioned conventional device has a structure that retains the shape of the filter element by the strength of the filter paper itself, it has a shape that is easily deformed, and thus is inconvenient to handle. Not only that, but it could deform during its use as a filter element.

On the other hand, the Applicant has developed a filter element that holds the filter element in a predetermined shape by applying an adhesive to the filter paper. This filter element is disclosed in JP-A-61-291015. In order to apply the adhesive to the filter paper to form the filter element in a predetermined circular shape, the filter element must be manufactured in a predetermined process in consideration of characteristics such as paper quality and folding structure of the filter paper. That is, an edging step of partially pressing the surface of the band-shaped filter paper to form linear recesses on the surface,
Adhesive application process of applying adhesive to the surface of filter paper, bending process of bending filter paper in linear recesses, crimping process of adhering the facing surfaces of the folded filter paper to each other, and straightening conveyance to cool and heat the filter paper The filter element is formed through various steps such as a step and a circular step of forming the filter paper into a circular shape. As long as the quality and folding structure of the filter paper are not changed, a filter element having a desired shape cannot be manufactured even if any of the above steps is omitted. Traditionally,
Since no device for forming a circular filter-shaped filter paper coated with an adhesive has been proposed, the filter element developed by the present applicant could not be automatically manufactured.

Therefore, an object of the present invention is to provide a filter paper forming apparatus which eliminates the above-mentioned drawbacks and forms a filter paper to which an adhesive is adhered into a circular shape.

Means for Solving the Problems A filter paper forming apparatus according to the present invention has a pleated shape having a flat substantially triangular crest (2) and a trough (3) formed between a pair of adjacent crests (2). A transport device (6) for transporting the filter paper (5), a guide member (8) forming a circular passage (7) for supporting the bottom surface of the filter paper (5) supplied by the transport device (6), and the filter paper ( 5) A high-speed feeding device which is arranged on the bottom side (2a) side of the triangular mountain portion (2) and outside the circular passage (7) and which contacts the filter paper (5) to feed the filter paper (5) at a high speed ( 9) and the apex (2b) side of the triangular peak (2) of the filter paper (5) and inside the circular passage (7) and contacting the filter paper (5) to slow the filter paper (5). And a low speed feeding device (10) for feeding the paper by a low speed feeding device (10), which is arranged adjacent to the moving filter paper (5) and adjacent to the bottom side (2a) of the triangular mountain portion (2). And a filter paper top and the heating device for heating the trough portion (3) of the deposited adhesive to the bottom surface (4) adjacent to the vertex (2b) side of the triangle (5) (11).

The relatively high speed by the high-speed feeding device (9) on the bottom side (2a) side of the mountain portion (2) of the fold-shaped filter paper (5) supplied along the guide member (8) by the work transfer device (6). At the same time, the peak (2b) side of the peak portion (2) of the filter paper (5) is moved at a relatively low speed by the low speed feeding device (10) while the adhesive ( 4) is heated. Therefore,
When the adhesive (4) attached to the filter paper (5) was softened, the filter paper (5) was formed into a circular shape due to the speed difference between the inside and outside of the filter paper (5), and the adhesive (4) was solidified. After that, the filter paper (5) is firmly held in a circular shape by the adhesive (4).

Practical Examples Hereinafter, embodiments of the filter paper molding apparatus of the present invention will be described with reference to FIGS.
The figure will be described.

The filter paper forming apparatus 1 according to the present invention includes an adhesive 4 from the band-shaped filter paper 5'shown in FIG. 6 on one side end of the front side and the other side end of the back side of the band-shaped filter paper 5'as shown in FIG. Is applied and then folded, as shown in FIGS. 7 and 8,
The fold-shaped filter paper 5 having the peaks 2 and the valleys 3 can be formed in a circular shape having a curved shape with a substantially constant curvature. The filter element shown in FIGS. 7 and 8 has substantially the same shape as the filter element shown in Japanese Patent Publication No. 61-291015. That is, the formed filter paper 5 forms a large number of folds composed of the ridges 2 and the valleys 3, and both slopes (opposing surface 28) of each ridge 2 at one end of the folds are brought close to each other, The top of the inner surface of the mountain portion 2 is joined to a predetermined position to form a first joint portion 5a, and further, both slopes of the valley portions 3 at the other end of the folds (the opposing surface 28 on the back side) are brought close to each other, It has a shape in which the second joint 5b is formed by joining the bottom of the inner surface of the trough 3 to a predetermined position.

As shown in FIG. 1, the filter paper forming apparatus 1 includes a carrying device 6 for carrying the filter paper 5 and the filter paper 5 supplied by the carrying device 6.
A guide member 8 forming a circular passage 7 of the above, a high speed feeder 9 arranged outside the guide member 8 and contacting the filter paper 5 to feed the filter paper 5 at a high speed, and arranged inside the guide member 8 and A low-speed feeding device 10 for feeding the filter paper 5 at a slow speed in contact with the filter paper 5, and a filter paper 5 arranged adjacent to the moving filter paper 5
And a heating device 11 for heating the adhesive 4 adhered to the.

As shown in FIG. 7, the ridges 2 of the fold-shaped filter paper 5 have a substantially flat triangle, and the valleys 3 are formed between a pair of adjacent ridges 2. The circular passage 7 supports the bottom surface of the filter paper 5. The high speed feeding device 9 is arranged on the bottom side 2a side of the triangular mountain portion 2 of the filter paper 5, and the low speed feeding device 10 is arranged on the apex 2b side of the triangular mountain portion 2 of the filter paper 5. The adhesive 4 is disposed on the upper surface of the band-shaped filter paper 5'adjacent to the moving band-shaped filter paper 5'and adjacent to the bottom side 2a of the triangular peak 2 and on the bottom surface of the valley 3 adjacent to the apex 2b side of the triangle. Attached.

As shown in FIG. 20 and FIG. 21, the transport device 6 has a filter paper 5
Drive belts 61, 62, 63 and 64 that contact the upper surface, the lower surface and both side surfaces of the filter paper and convey the filter paper 5 in the traveling direction are provided, and the filter paper 5 moves smoothly. The transport device 60 has a curing acceleration device 65 that supplies cold air of 5 ° C. and warm air of 80 ° C. to the filter paper 5 while the filter paper 5 is being transported. Warm air is passed through the filter paper 5 by the curing accelerator 65.
To soften the thermoplastic adhesive 4 a little, and correct the pitch between the peaks 2 and the valleys 3 of the filter paper 5. In the transport device 60, the adhesive 4 may not be completely cured when the screw drums 92 and 102 to be described later are pressure-bonded, and the pitch of the fold-shaped filter paper 5 may become uneven, so that the adhesive portion is prevented from peeling off. Therefore, it has a function of correcting the filter paper 5 into a predetermined shape and holding it. Further, since the drive belt of the transport device 60 adjusts the pitch between the crests 2 of the fold-shaped filter paper 5, the transport speed of the drive belt can be adjusted by controlling the rotation speed of the motor or switching the clutch and the speed reducer. it can.

The guide member 8 forming the circular passage 7 of the filter paper 5 is made of metal and has the same shape as the circular shape in which the filter paper 5 is formed. The heating device 11 that heats the adhesive 4 attached to the filter paper 5 is, for example,
Hot air for heating the adhesive 4 to 80 ° C. is supplied to the filter paper 5.

1 to 3 showing a first embodiment of the present invention, a high-speed feeding device 9 is formed on a threaded portion 90 having a constant pitch for crimping a mountain portion 2 of a filter paper 5 and an end portion of the threaded portion 90. It has a first screw drum 92 provided with a conical portion 91 formed in a shape of a diameter that expands in the traveling direction of the filter paper 5. The low-speed feeding device 10 is formed on the screw portion 100 having a constant pitch for crimping the ridge portion 2 of the filter paper 5 and the end portion of the screw portion 100, and is formed in a shape of a diameter that reduces in the traveling direction of the filter paper 5 and has a small pitch. A second screw drum 104 having a conical portion 103 having a threaded portion 102 formed therein. The axes of the first and second screw drums 92 and 102 are parallel to each other and are usually rotated at the same rotation speed. However, the peripheral speed of the screw drum differs depending on the radius. The first and second screw drums 92 and 102 may be rotated at different angular velocities.

The constant-pitch screw portion 90 of the high-speed feeding device 9 presses the pair of facing surfaces 28 forming the ridge portion 2 of the filter paper 5 on the bottom side 2a side of the triangular ridge portion 2 of the filter paper 5. The constant-pitch screw portion 100 of the low-speed feeding device 10 crimps a pair of opposing surfaces 28 forming the peak portion 2 of the filter paper 5 on the apex 2b side of the triangular peak portion 2 of the filter paper 5.

In the above structure, the pleated filter paper 5 supplied from the transport device 60 is sent between the first screw drum 92 and the second screw drum 104. Therefore, the crests 2 of the first screw drum 92 and the second screw drum 104 are fitted between the crests 2 and the troughs 3 of the filter paper 5. In this state, warm air is supplied to the filter paper 5 to soften the adhesive 4. . At the same time, the thread portion 90 of the high-speed feeding device 9 with a constant pitch and the thread portion 102 of the low-speed feeding device 10 with a small pitch are used to form the peak portion 2 of the filter paper 5.
The pitch between the valley portions 3 and the valley portions 3 is corrected, and a circular shape is formed along the circular passage 7.

4 and 5 show a second embodiment of the filter paper molding apparatus according to the present invention. In these examples, the high speed feeder 9
The low-speed feed device 10 has feed rollers 105 and 106 which come into contact with the filter paper 5, respectively. The feed rollers 105 and 106 are rotated at the same speed in principle. However, they may be rotated at different speeds. The outer peripheral speed of the roller 105 of the high speed feeding device 9 contacting the filter paper 5 is higher than the outer peripheral speed of the roller 106 of the low speed feeding device 10 contacting the filter paper 5. Therefore, it will be understood that in the second embodiment, the pleated filter paper 5 can be formed in a circular shape as in the first embodiment.

The filter paper forming apparatus 1 of the present invention is used as a series of a series of filter paper forming steps for forming a roll-shaped band-shaped filter paper 5'on an air filter element. That is, as shown in FIGS. 9 and 10, the filter element manufacturing apparatus 20 includes an edging device 21, an adhesive supply device 22, a folding device 23, a crimping device 24, a conveying device 60, and a filter paper. And a molding device 1. The edging device 21 has a linear projection 26 having a shape complementary to the linear concave portion 25 to be formed on the surface of the band-shaped filter paper 5 ′ and projecting in a direction substantially perpendicular to the length direction of the filter paper 5.
A pair of rotary drums 30 having Adhesive supply device
In 22, the thermoplastic adhesive 4 is applied to the surface of the filter paper 5 on which the linear recess 25 is formed. The folding device 23 comes into contact with a part of the filter paper 5 to which the adhesive 4 is not attached and gives a buckling force to the filter paper 5 in the traveling direction to bend the filter paper 5 at the linear recess 25. As shown in FIG. 13, the crimping device 24 is provided with a pair of screw drums 29 having a rotary shaft 25 arranged in parallel with the conveying direction of the filter paper 5 and arranged on both sides of the filter paper 5. Crimping device
24 is a rotating screw drum as shown in FIG.
Filter paper 5 between threads 27 formed with a decreasing pitch of 29
By transporting the folded portion of the above, the facing surfaces 28 of the folded and stacked filter papers 5 are pressure-bonded to each other, and the facing surfaces 28 are bonded by the adhesive 4.

As shown in FIG. 2, the filter element manufacturing apparatus 20
Has a frame 30 in front of which a roll of strip 5'is rotatably supported on a shaft supported by the frame 30 or other holding device (not shown). The filter paper 5 pulled out from the roll is supplied to the edging device 21. The edging device 21 has a pair of edging drums 31 that press-mold a linear recess 25 in a direction substantially perpendicular to the length direction of the filter paper 5 on the filter paper 5. Edging drum
31 is supported on shafts 23 and 24 which are rotatably mounted on a frame 30 above and below the filter paper 5, respectively.

As shown in FIG. 6, the plurality of linear recesses 25 have lines that are substantially perpendicular to the length direction of the filter paper 5 but are inclined at an angle of about θ = ± 3 to 10 °. Further, the linear recess 25,
By pressing the linear protrusions 26 of the edging drum 31 against the filter paper 5 from above and below by a predetermined angle interval,
The linear recesses 25 are formed so as to be alternately recessed in the width direction from the surface of the filter paper 5. That is, the right-angled linear concave portion 25 has a V-shaped upper surface linear concave portion 25a and a Y-shaped lower surface linear concave portion 25b which are pressed from above and below, respectively. Therefore, the edging drum 31 is provided with the linear protrusions 26 forming the upper surface linear concave portions 25a and the lower surface linear protrusions 25b shown by solid lines and dotted lines in FIG.

The filter paper 5 on which the linear recess 25 is formed by the edging device 21 is
It is sent to the adhesive supply device 22.

The adhesive supply device 22 is fixed to the frame 30 and has a reversing device 32 for reversing the direction of the filter paper 5 and a pair of adhesive applying devices 33, as shown in FIG. The reversing device 32 has two rollers 34 that turn the back surface of the filter paper 5 upward, and one roller 35 that turns the front surface of the filter paper 5 upward again. The adhesive application device 33 is disposed between the rollers 34 and 35 and is an adhesive supply pipe for applying the synthetic resin adhesive 4 to the back surface of the filter paper 5.
36 and an adhesive supply pipe 37 for applying the adhesive 4 to the surface of the filter paper 5 behind the roller 34. The pressure-fused and melted adhesive 4 is pressure-fed to the adhesive supply pipes 36, 37 from an adhesive supply source (not shown), and one end of the front surface of the filter paper 5 and the other end of the back surface of the filter paper 5 are supplied. The adhesive 4 is linearly attached to the.

The filter paper 5 coated with the adhesive 4 in this way is
To the folding device 23 attached to the. Bending device 23
Has a pair of opposed rollers 40, as shown in FIG. As shown in FIG. 13, each roller 40 has a pair of rollers 40a and 40b coaxially provided. roller
40 contacts the surface of the filter paper 5 to which the adhesive 4 is not attached,
A buckling force in the traveling direction is applied to the filter paper 5. Bending device 23
The crimping device 24 is attached to the frame 30 at the rear of the crimping device 24, and the speed at which the filter paper 5 is conveyed by the crimping device 24 is slow.
Can be folded into a fold.

As shown in FIG. 14, each of the pair of screw drums 29 of the crimping device 24 has rotating shafts 41 of different heights, and as shown in FIGS. The portion 42 engages with the recess 50 on the front surface of the filter paper 5, and the screw thread portion 42 of the screw drum 29 has the recess 51 on the back surface of the filter paper 5 (7th
(Figs. 8 and 14). As shown in FIG. 12, the pitch of the thread portions 42 formed on the screw drum 29 is formed in the decreasing pitch portion 43 and the decreasing pitch portion 43 which gradually decrease with respect to the traveling direction of the filter paper 5, respectively. And a fixed pitch portion 44 that is formed. The facing surface 28 of the filter paper 5 conveyed between the screw thread portions 42 of the constant pitch portion 44 is pressure-bonded and firmly bonded with the adhesive 4.

In the above structure, the filter paper 5 pulled out from the roll of the band-shaped filter paper 5 ′ has the linear recess 25 formed between the pair of edging drums 31 of the edging device 21. After that, the adhesive 4 is linearly attached to the front surface and the back surface of the band-shaped filter paper 5 ′ from the adhesive supply pipe 37 of the adhesive supply device 22. In this state,
The roller 40 of the folding device 23 in the direction of the crimping device 24 is adhesive 4
Is brought into contact with the surface of the band-shaped filter paper 5'which is not adhered, and a buckling force in the traveling direction is applied to the band-shaped filter paper 5 ', so that the band-shaped filter paper 5'is folded at the linear recess 25 into a fold shape. The folded band-shaped filter paper 5 ′ has a decreasing pitch portion 43 that gradually decreases.
And a constant pitch portion 44 formed behind the reduced pitch portion 43, the thread portion 42 of the crimping device 24 is crimped and adhered at a predetermined pitch. Thereafter, the transport device 60 heats the filter paper 5 with warm air during transport to correct the pitch of the peaks 2 and the valleys 3 of the filter paper 5.

The filter paper 5 discharged from the conveying device 60 is supplied to the cutting device 70 shown in FIGS. 18 and 19. The cutting device 70 has a function of cutting the fold-shaped filter paper 5 into a predetermined length. Cutting device 70
Includes a motor 71, a forward / reverse clutch 80 drivingly connected to the motor 71, a clutch brake 81 drivingly connected to the forward / reverse clutch 80, a feed ball screw 72 connected to a drive shaft of the clutch brake 81, and a feed ball screw 72. And a movable support device 73 that meshes with the ball screw 72. Further, the cutting device 70 includes the air cylinders 74 and 75 mounted on the movable support device 73, and the rotatable blades 76 mounted on the air cylinders 74 and 75.
Have. Further, the cutting device 70 has a light-reflective sensor that detects the top of the peak 2 of the filter paper 5, and a light-transmissive sensor that is connected to a counter that counts the number of the peak 2 of the filter paper 5.
Illustration of these sensors and counters is omitted.

In the above structure, when the light transmission type sensor counts the number of peaks 2 of the filter paper 5 and the light reflection type sensor detects the position of the peaks 2 of the filter paper 5 to be cut, the motor 71 is operated and the blade 76 is operated. Is moved at the same speed as the conveyance speed of the filter paper 5 and in the same direction as the filter paper 5. At the same time, the blade 76 is rotated and the air cylinders 74 and 75 are operated, so that the blade 76 moves vertically upward, and at the same time, moves to a certain height, and then the conveyance direction of the filter paper 5 is changed at right angles. That is, the 19th
It is moved horizontally from the position shown in the figure to the right. When the filter paper 5 is cut by the movement of the blade 76 in the conveying direction, the vertical direction, and the horizontal direction, a limit switch (not shown) is activated. Therefore, the blade 76 stops moving and is returned to the initial position on the lower left side and the front side for the next cutting of the filter paper 5.

Further, the filter paper 5 cut into a predetermined length is formed into a circular shape by the filter paper forming apparatus 1 shown in FIG. 1, as shown in FIG. This is because the filter element formed of the filter paper 5 is housed in the metal annular case.

Effect of the Invention According to the present invention, it is possible to continuously and automatically manufacture a filter paper formed in a curved shape. In particular, JP-A-61-1
It is possible to continuously and automatically manufacture the filter element and the filter element disclosed in Japanese Patent No. 291015. Therefore, the filter element formed into a predetermined shape with the adhesive has a structure that is not easily deformed by an external force. In addition, the filter element formed from this filter paper does not have uneven filtering performance partially. Thus, it can be understood that the filter paper molding apparatus of the present invention is suitable for mass production of filter elements having a circular shape.

[Brief description of drawings]

1 is a plan view of a filter paper forming apparatus according to the present invention, FIG. 2 is a perspective view thereof, FIG. 3 is a plan view of an edging drum for bending a filter paper, and FIG. 4 is a plan view showing another embodiment of the present invention. 5 and 5 are this perspective view, FIG. 6 is a plan view of the filter paper, FIG. 7 is a perspective view showing the upper surface of the formed filter element, and FIG. 8 is a perspective view showing the back surface of the formed filter element. FIG. 9 is a perspective view showing a part of a filter element manufacturing apparatus for forming a band-shaped filter paper into a fold shape, and FIG.
Side view of the figure, FIG. 11 is a side view of the edging device, FIG. 12 is a side view of the bending device and the crimping device, FIG. 13 is this plan view, FIG. 14 is an end plan view of the crimping device, and FIG. FIG. 16 is a sectional view of the conveying device, FIG. 16 is a side view of the conveying device, FIG. 17 is a sectional view of the conveying device, FIG. 18 is a side view of the cutting device, FIG. 19 is an end view of the cutting device, and 20. FIG. 21 is a sectional view of the carrier device, and FIG. 21 is a plan view of the carrier device. 1 ... Filter paper forming device, 2 ... Mountain portion, 3 ... Valley portion, 4 ...
Adhesive, 5 ... Filter paper, 6 ... Conveying device, 7 ... Circular passage, 8 ... Guide member, 9 ... High speed feeding device, 10 ... Low speed feeding device, 11 ... Heating device 11

Claims (5)

[Claims] 1. A transport device for transporting a wall-shaped filter paper having a flat and substantially triangular ridge and a valley formed between a pair of adjacent ridges, and a bottom face of the filter paper supplied by the transport device is supported. A guide member that forms a circular path, a high-speed feeding device that is located on the bottom side of the triangular peak of the filter paper and outside the circular path and that contacts the filter paper to feed the filter paper at a high speed, and the triangular peak of the filter paper. A low-speed feeder arranged on the apex side of the section and inside the circular passage and contacting the filter paper to feed the filter paper at a slow speed, and a filter paper arranged adjacent to the moving filter paper and adjacent to the base of the triangular peak. And a heating device that heats the adhesive attached to the bottom surface of the valley portion adjacent to the apex side of the triangle. 2. A high-speed feeding device comprises a screw part having a constant pitch for crimping a mountain portion of a filter paper, and a conical part formed at an end of the screw part and having a diameter of which is enlarged in a traveling direction of the filter paper. It has a first screw drum equipped with, and the low-speed feeding device is formed in a screw portion of a constant pitch for crimping the mountain portion of the filter paper and at the end of the screw portion, and formed in a shape of a diameter that shrinks in the traveling direction of the filter paper. The filter paper forming apparatus according to claim 1, further comprising a second screw drum having a conical portion formed with a small-pitch screw portion. 3. A high-speed feeding device and a low-speed feeding device each have a feed roller in contact with the filter paper, and the outer peripheral speed of the roller of the high-speed feeding device in contact with the filter paper is greater than the outer peripheral speed of the roller of the low-speed feeding device in contact with the filter paper. The filter paper molding apparatus according to claim (1). 4. The filter paper molding device according to claim 1, wherein the heating device is a warm air supply device for ejecting warm air onto the surface of the filter paper. 5. The filter paper molding apparatus according to claim 2, wherein axes of the first and second screw drums are parallel to each other.