JPH0453566B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of forming an element for a liquid filter, which is mainly a spiral-shaped element, so that the end portion of paper can be treated satisfactorily.

(Prior Art) The spiral-shaped over-element e, which is widely used to purify vehicle fuel, is shown in Figure 4A, and is made from a series of crepe paper 1.
Fold in half into a V shape to create inner piece 1a and outer piece 1b.
and their base ends are glued to the central tube 2,
Rotate the central cylinder 2 in the direction of the arrow to wind the V-shaped paper 1 on the cylinder in a spiral shape. At this time, a nozzle is attached to the open end side edge of the outer piece 1b that comes out on the surface of the spiral body. Apply hot melt adhesive a according to step 3,
The edges of the adjacent inner pieces 1a overlapping on it are adhered in sequence, and when using it, the above-mentioned V
An end plate 4 with a center hole is applied with the open end side of the paper 1, that is, the side where the edge of the inner piece 1a and the edge of the outer piece 1b are glued, facing down, and this is assembled into a cylindrical container as shown in FIG. 5, and sealing is applied between the upper end outer circumference of the over-element e and the wall surface of the container 5, and then the upper end opening of the container 5 is covered with a thick sheet plate 6 and a cover plate 7. The liquid to be treated is introduced into the container 5 from the center hole 6a of the sheet plate 6 through the central cylinder 2 of the element, and after passing the lower end plate 4, the liquid is reversed and raised. 1a and outer piece 1b, is allowed to pass through the paper, and is taken out from the central circumferential hole of the sheet plate 6.

(Problem to be Solved by the Invention) By the way, it is important that the liquid to be treated does not pass through untreated from any part of the excess element e. The terminal part is processed as follows. That is, as described above, the hot-melt adhesive a is applied to the edge of the open end of the V-shaped paper 1 being wound with a nozzle, but when it reaches the end, the edge of the terminal paper Pasting is temporarily stopped and adhesive a' is applied in the width direction of the paper 1 using another nozzle as shown in FIG. 4B, after which the terminal paper is pasted.

However, since it takes some time to finish applying the adhesive in the width direction, the adhesive a on the terminal edge 7 that has already been applied dries, and the terminal paper is pasted. Even if attached, the terminal edge 7
The portion is not bonded, and the unbonded portion remains, and the liquid to be treated enters the element e from there and flows out without being passed through the paper 1.

Therefore, the present invention aims to solve the above-mentioned problems.

(Means for Solving the Problems) Based on the above object, the present invention folds a series of papers in half in a V shape to form an inner piece and an outer piece,
Their proximal ends are glued to the central tube, and the central tube is rotated to spirally wind the paper onto the tube, and during the winding process, the edge of the outer piece on the open end side of the bifold paper is attached. Applying adhesive with a nozzle, sequentially adhering the edges of the adjacent inner pieces to the applied area, and moving the nozzle in the width direction of the paper while continuing to roll in the paper at a predetermined position at the end of the paper. , the adhesive is applied diagonally in the width direction continuously to the terminal edge, and the outer and inner pieces of the terminal paper are adhered to the edge continuously in the width direction.

(Function) According to the present invention, the adhesive is applied to the end portion of the paper continuously toward the open end side and diagonally in the width direction of the paper, so that the adhesive in the width direction of the end paper is continued without a temporary stop. This allows the adhesive to be applied without drying areas before joining.

(Example) The example will be explained with reference to the drawings.
In FIG. 1, reference numeral 11 is a series of crepe papers, which are folded in half into a V-shape to form an inner piece 11a and an outer piece 11b, the base ends of which are glued to the central cylinder 12, and the central cylinder By rotating in the direction of the arrow 12, the bi-folded V-shaped paper 11 is folded into the central cylinder 1.
It is wrapped around the circumferential surface of 2 in a spiral shape.

During this winding operation, the nozzle 1 is attached to the open end side edge of the outer piece 11b of the V-shaped paper 11 that comes out to the surface.
3, the hot-melt adhesive a is applied, and as the adhesive is rolled up, the adjacent inner pieces 1a overlapping thereon are successively adhered.

Therefore, in this invention, when the application of the adhesive a to the edge on the open end side reaches a predetermined end position, the nozzle at a fixed position continues to wind in the V-shaped paper 11. 13 on paper 1
1 in the width direction, the adhesive a is applied diagonally to the winding direction, and the edges of the inner and outer paper pieces 11a and 11b at the end portions are bonded, and this is followed by bonding in the width direction.

After this adhesion is completed, as shown in FIG. 2A, a length of paper 11 is protruded from the tip of the adhesive part by approximately the width, and the remainder is cut as a folded end 11a.
Next, the lower half of this folded end 11a is folded back to the outside along the diagonal line 11d at an angle of approximately 45 degrees downward to the right, and the end is overlapped on the rolled paper, and the second
Form a superelement e as shown in the figure (b). At that time, the cut end of the V-shaped paper 11 is aligned with the edge on the open end side.

FIG. 3 shows the state in which it is used. As mentioned above, the porous end plate 14 is disposed below the over-element e, that is, on the open end side of the V-shaped paper 11, and the element e is connected to the container 15. An adhesive is applied between the outer periphery of the upper end of the element e and the wall surface of the container, and the upper opening of the container 15 is closed by a sheet plate 16 and a cover plate 17.

Thus, the liquid to be treated flows into the container 15 from the central hole of the sheet plate 16 through the central cylinder 12 of the perforated element e, and the liquid to be treated flows through the porous end plate 1.
4, it reverses and rises, and each inner piece 11a and outer piece 11 of the wrapping paper 11 of the excess element e
b, is purified by passing through the paper 11, and is taken out from the central peripheral hole of the sheet plate 16.

In this case, the paper 11 is coated with adhesive a continuously without a break on the open end side edge and in the width direction, and the adjacent paper is bonded immediately after application, so that the area where adhesive a is applied is not bonded. No parts remain.

In the illustrated example, the inner piece 11a and the outer piece 11b of the paper 11 are shown as flat, but
Either the inside or the outside may be formed into a wavy shape.

(Effects of the Invention) As described above, according to the present invention, it is possible to reliably adhere the widthwise portion of the paper in a continuous manner to the edge at the end portion of the paper, and the adhesive does not dry as in the conventional method. It is possible to form an over-element without creating a non-adhesive part, and thus through which the liquid to be treated does not pass through without being purified.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the adhesive being applied to the end portion of the over-element according to the present invention.
FIG. 2A is a perspective view showing the folded end portion. Figure B is an elevational view of the over-element. FIG. 3 is a cross-sectional view showing the state in which it is used. FIG. 4A is a perspective view showing the winding state of a conventional over-element. FIG. 3B is a plan view showing the adhesive applied state in the width direction. Fifth
The figure is a sectional view showing how a conventional element is used. In the figure, 1, 11...paper, 1a, 11a...inner piece, 1b, 11b...outer piece, 11c...folded end, 11d...diagonal line, 12...center tube, 1
3... Nozzle, a... Adhesive, e... Overelement.

Claims (1)

[Claims] 1 Fold a series of papers in half in a V-shape to form an inner piece and an outer piece, glue their base ends to a central cylinder, wind the paper in a spiral shape on the cylinder, and adjust the winding. In the process, adhesive is applied to the edge of the outer piece on the open end side of the bifold paper using a nozzle, and the edge of the adjacent inner piece is sequentially glued to the applied area, and the end of the paper is placed at a predetermined position. While continuing to roll in the paper, move the nozzle in the width direction of the paper, apply the adhesive diagonally in the width direction continuously to the terminal edge, and apply the adhesive continuously to the edge of the outer and inner pieces of the terminal paper. A method for forming a liquid filter element characterized by bonding it in the width direction.