JP2690118B2 - Drainage filter to prevent sediment outflow - Google Patents

Description

TECHNICAL FIELD The present invention relates to a drainage filter for preventing outflow of earth and sand, which is attached to a drain hole formed through a side wall such as a U-shaped groove and various retaining walls.

[Prior Art] Conventionally, as a filter of this type, a full-scale Sho 60-165528
Japanese Unexamined Patent Publication (KOKAI) No. H10-26095. The filter is the first
As shown in FIG. 7 and FIG. 18, a tubular body portion 22 is formed on the perforated plate 21, and an enlarged portion 23 that expands outward is formed at the open end of the body portion 22. A plurality of notches 24 extending to the body portion 22 are provided, and ribs 25 having a hollow interior and a taper shape are provided between the notches 24 so as to project. Then, when the filter is inserted into a drain hole such as a U-shaped groove, the body portion 22 is reduced in diameter by the notch 24 and engages in the drain hole while having elasticity.

[Problems to be Solved by the Invention] However, as described above, this filter is notched 24
Since the body portion 22 is given elasticity by the rigidity of the body portion 22 itself. Therefore, the rib 25 of the filter inserted into the drainage hole has a weak force for pressing the inner peripheral wall of the drainage hole outward, and the filter engaged in the drainage hole may fall off from the hole. It was

An object of the present invention is to provide a discharge filter for preventing outflow of sediment, which is firmly engaged in the drainage hole and is unlikely to fall off from the hole.

[Means for Solving the Problems] A first invention is that a cylindrical body portion having no cutout is formed around a perforated plate by molding with a synthetic resin,
The outer circumference of the body is in the same direction as the body's radial direction or inclined with respect to the body's radial direction so as to elastically deform and engage with the drainage hole to be inserted. The gist is a drainage filter for preventing sediment outflow, which has a plate-shaped engaging portion extending along the drainage filter.

A second aspect of the present invention is formed of a synthetic resin to form a tubular body having elasticity and notches around the perforated plate, and extends substantially along the insertion direction on the outer periphery of the body. The gist of the present invention is a drainage drainage filter having a plate-shaped engaging portion.

A third invention is that a porous plate is fixed to one end of a tubular body having a notch and is formed of a synthetic resin, and a locking collar connected to the outer peripheral edge of the porous plate is formed on the outer periphery of the body. A plate-like engaging portion extending substantially along the insertion direction is formed on the outer periphery of the body portion, and a gap is formed between the engaging portion and the locking collar to divide the engaging portion and the engaging flange. Drainage filter for preventing sediment outflow that is the main point.

A fourth aspect of the present invention is the sediment outflow prevention drainage filter according to any one of the first to third aspects, wherein the outer edge of the engaging portion is inclined so that the height thereof becomes lower toward the front in the insertion direction. The outline of the prevention drainage filter.

A fifth aspect of the present invention is the sediment outflow prevention drainage filter according to any one of the first to third aspects, wherein a plurality of plate-shaped elastic blades are provided so as to expand on the open end side of the body. The outline of the prevention drainage filter.

[Operation] In the first invention, when the filter is inserted into the drain hole, the engaging portion is pressed by the inner peripheral wall of the drain hole and elastically deformed accordingly. As a result, the engaging portion itself presses the inner peripheral wall of the drain hole.

In the second invention, when the filter is inserted into the drainage hole, the body portion is pressed inward by the engaging portion and elastically deformed accordingly. As a result, the engaging portion presses the inner peripheral wall of the drain hole.

According to the third aspect of the invention, when the filter is inserted into the drain hole, the inner peripheral wall of the drain hole is pressed to elastically deform the engaging portion and the body portion of the filter. As a result, the engaging portion presses the inner peripheral wall of the drain hole. The engaging portion is elastically deformed freely by the gap between the engaging flange and the engaging flange regardless of the engaging flange.

In the fourth aspect of the invention, the outer edge of the engaging portion is formed so as to be inclined so that the height becomes lower toward the front in the insertion direction, and the outer edge guides the filter during insertion.

In the fifth invention, when the elastic blade is provided, the elastic blade presses the inner peripheral wall of the drain hole by its elasticity.
Therefore, the engagement of the filter with the drain hole becomes stronger.

[Embodiment] A first embodiment in which the present invention is embodied so as to correspond to claim 1 will be described below with reference to FIGS. 1 to 4.

As shown in FIGS. 2 and 3, the sediment outflow prevention drainage filter of this embodiment is integrally molded of synthetic resin, and a mesh-shaped perforated plate 2 is formed at one end of a tubular body 3 having no notch. Has been done. The perimeter of the perforated plate 2 protrudes outward from the outer periphery of the body portion 3 to form a locking collar 4. Further, four engaging portions 5 having elasticity are provided on the outer periphery of the body portion 3 at equal intervals so as to form a pair of two engaging portions 5. Each of the engaging portions 5 has a thin plate shape with respect to the body portion 3, is formed so as to project outward in the radial direction of the body portion 3 and extend along the axial direction of the body portion 3. ing. The outer edge 5a of each engaging portion 5 is inclined so that the front portion (the left side in FIGS. 1 and 2) becomes lower in height.

As shown in FIG. 1, the filter of this embodiment is attached to a tapered drain hole H which is provided in a U-shaped groove and whose diameter increases toward the outside (right side in FIG. 1). The diameter of the locking brim 4 of the filter is larger than the inner diameter of the outer end of the drain hole H, and the dimension between the outer edges 5a of the engagements 5 of each pair facing each other corresponds to these engagement portions 5. Drain hole H in the part
Is larger than the inner diameter of

Next, a case where the drainage filter for preventing sediment outflow configured as described above is attached to the drainage hole H will be described.

As shown in FIGS. 1 and 4, when the filter is inserted from the outside of the drainage hole H with the body portion 3 thereof first, the outer edges 5a of the four engaging portions 5 contact the inner peripheral surface of the drainage hole H, respectively. In addition, since the thickness of the engaging portion 5 is smaller than that of the body portion 3 as described above, the body portion 3 is not deformed, and the vicinity of the outer edge 5a of the engaging portion 5 accompanies the insertion. It is pressed against the inner peripheral surface and crushed. When the locking collar 4 comes into contact with the outer wall of the U-shaped groove, the filter is prevented from further entering the drain hole H and is positioned in the outer half of the drain hole H.

At this time, the vicinity of the outer edge 5a of each engaging portion 5 is elastically deformed by being crushed and presses the inner peripheral wall of the drainage hole H outward. As a result, the filter is firmly engaged in the drainage hole H, and there is no risk of falling off from the hole H.

As described above, since the filter of this embodiment can be engaged in the drain hole H by the elasticity of the engaging portion 5 itself,
It is not necessary to provide the body portion 3 with a notch to impart elasticity to the body portion 3. Therefore, since the rigidity of the body portion 3 is lowered by the notch, the engaging portion 5 of the filter is drained from the drain hole H.
The force to press the inner wall of the filter is weak and the filter has the same drainage hole H
There is no danger of falling out of the car.

Further, since the outer edge 5a is inclined as described above,
By the guide of the outer edge 5a, the filter can be easily drained through the drain hole H.
Can be inserted inside.

The engaging portion 5 of this embodiment locks the filter in the drain hole H by crushing the vicinity of the outer edge 5a, but the point is that the engaging portion 5 itself is inserted with the filter in the drain hole H. Causes elastic deformation, and the elastic deformation presses the inner wall of the drain hole H. Therefore, as shown in FIG. 5, the engaging portion 11 may be formed to be extremely thin, and the filter may be engaged in the drainage hole H by bending the engaging portion 11, as shown in FIG. As described above, the engaging portion 12 may be formed so that the thickness becomes thinner toward the tip, and the filter is engaged in the drainage hole H by bending the tip. Further, although the engaging portion 5 of this embodiment is formed so as to project outward in the radial direction of the body portion 3, as shown by the phantom line in FIG. The filter is formed so as to incline with respect to the radial direction of the
The engaging portion 13 may be further inclined and bent when it is inserted into.

Next, a second embodiment in which the present invention is embodied so as to correspond to claim 2 will be described with reference to FIGS. 8 to 11.

As shown in FIGS. 9 and 10, the filter of this embodiment is also integrally molded of synthetic resin similarly to the filter of the first embodiment described above, and the mesh-like perforated plate 7 is a thin tube without notches. It is formed at one end of the cylindrical body 8. The body portion 8 has elasticity, and a pair of engaging portions 9 facing each other are provided on the outer periphery of the body portion 8.
Are orthogonally provided in two sets. The engaging portion 9 has a plate-like shape having a large thickness with respect to the body portion 8, is formed so as to protrude outward in the radial direction of the body portion 8 and extend along the axial direction thereof. The outer edge 9a of each engaging portion 9 is a front portion (8th,
The left side (shown in Fig. 9) is inclined so that the height becomes lower.

Further, as shown in FIGS. 9 and 10, four plate-like elastic blades 10 are formed at the rear end of the body portion 8 so as to be located between the respective engaging portions 9. Further, the elastic blade 10 is expanded toward the rear part.

The drainage hole H to which the filter of this embodiment is attached
8 is the same as the drainage hole H of the first embodiment, the diameter of the perforated plate 7 of the filter is slightly larger than the inner diameter of the inner end of the drainage hole H, and the diameter of each of the facing pairs is different. Engagement part 9
The dimension between the outer edge 9a and the outer edge 9a is larger than the inner diameter of the drainage hole H in the portion corresponding to these engaging portions 5. Further, the outer diameter of the rear end of the elastic blade 10 is larger than the inner diameter of the outer end of the drainage hole H.

Next, a case where the drainage filter for preventing sediment outflow configured as described above is attached to the drainage hole H will be described.

As shown in FIGS. 8 and 11, when the filter is inserted from the outside of the drain hole H at the tip of the body portion 8, the outer edges 9a of the four engaging portions 9 contact the inner peripheral surface of the drain hole H, respectively. In addition, since the thickness of the body portion 8 is thinner than the thickness of the engaging portion 9 as described above, the engaging portion 9 itself is not deformed, and the body portion 8 has the four engaging portions. It is pushed inward by 9 and elastically deforms into a substantially square ring shape.

On the other hand, when the rear ends of the four elastic blades 10 enter the drainage hole H, they are inserted while the outer diameters of the blades 10 are narrowed against the elasticity of themselves. Then, when the perforated plate 7 reaches the inside of the drainage hole H, the filter is not inserted any more and is held at this position.

At this time, the body portion 8 flexes inwardly with elasticity and presses each engaging portion 9 against the inner peripheral wall of the drainage hole H. The rear end of the elastic blade 10 also presses the inner peripheral wall of the drainage hole H outward due to its elasticity. Therefore, the filter is firmly engaged in the drainage hole H by the pressing force of the both 9 and 10, and there is no possibility of dropping from the hole H.

As described above, in the filter of the present embodiment, the body portion 8 is thin, and the filter itself has elasticity, and by this elasticity, the drain hole H can be engaged. Similar to the filter, it is not necessary to provide a cutout in the body 8 to give elasticity to the body 8. Therefore, since the rigidity of the body portion 8 is lowered by the notch, the force with which the engaging portion 9 of the filter presses the inner peripheral wall of the drainage hole H becomes weak, and there is no fear that the filter will fall out of the drainage hole H.

Further, since the elastic blade 10 also plays a role of engaging the filter with the drainage hole H as described above, the engagement of the filter with the drainage hole H becomes stronger.

The elastic blade 10 provided in the filter of the second embodiment may be provided in the filter of the first embodiment.

Next, a third embodiment in which the present invention is embodied so as to correspond to claim 3 will be described with reference to FIGS. 12 to 15.

As shown in FIGS. 13 and 14, the filter of this embodiment is integrally molded of synthetic resin as in the first and second embodiments, and the mesh-like porous plate 14 has a thickness without cutouts. Is formed at one end of the thin cylindrical body portion 15, and the perimeter of the perforated plate 14 forms a locking collar 16 that protrudes from the outer periphery of the body portion 15. The body portion 15 has elasticity, and two pairs of engaging portions 17 facing each other are provided on the outer periphery of the body portion 15 at right angles. The engaging portion 17 is formed so as to protrude outward in the radial direction of the same portion 15 so that the thickness becomes thinner toward the tip end thereof, and extends along the axial direction thereof. Each engaging part 17
The outer edge 17a is inclined so that the height becomes lower toward the front portion (left side in FIG. 13).

On the other hand, a die-cutting hole 18 is formed at each of four locations of the locking collar 16 corresponding to the engaging portion 17 so as to open rearward. A gap 19 is formed between the two, and the two are separated.

The drainage hole H to which the filter of this embodiment is attached
As shown in FIG. 12, is the same as the drain hole H of the first and second embodiments, the diameter of the locking collar 16 of the filter is larger than the inner diameter of the outer end of the drain hole H, and The dimension between the outer edges 17a of the engaging portions 17 of each pair facing each other is such that
Is larger than the inner diameter of the drainage hole H in the portion corresponding to.

Next, a case where the drainage filter for preventing sediment outflow configured as described above is attached to the drainage hole H will be described.

As shown in FIGS. 12 and 15, when the filter is inserted from the outside of the drain hole H with the body portion 15 first, four engaging portions 17 are formed.
The outer edge 17a of each of the contact portions abuts on the inner peripheral surface of the drainage hole H, and like the filter of the second embodiment, the four engaging portions are provided.
The body portion 15 is pushed inward by 17 and elastically deformed into a substantially square ring shape. As shown in FIG. 15, when the body portion 15 is deformed inward, each engaging portion 17 tilts in a direction away from the locking collar 16, but as described above, each engaging portion 17 and Since the locking brim 16 and the locking collar 16 are separated from each other, the engaging portions 17 can be separated from each other freely. And the filter is the body 15
Only by the elasticity of, the engaging portion is pressed against the inner peripheral wall of the drainage hole H and locked in the drainage hole H.

In this way, the filter of the present embodiment can be engaged in the drainage hole H by elastic deformation of the body portion 15 itself like the filter of the second embodiment, so that the body portion 15 is notched. It is not necessary to provide it to provide elasticity.

Further, as described above, since the gap 19 is formed and divided between each engaging portion 17 and the locking brim 16, each engaging portion 17
Can be freely tilted without being blocked by the locking collar 16. Therefore, the elastic deformation of the body 15 is prevented by the locking collar 16 and the elasticity of the body 15 does not become extremely high, and the filter once inserted into the drain hole H is
Due to this excessive elasticity, it is possible to prevent the trouble of dropping out of the hole H.

Further, in the filter of this embodiment, the locking collar 16
To form a gap 19 between each of the engaging portions 17 and
However, since the same mold-drilling hole 18 has a shape that opens rearward, it can be simultaneously molded by a mold that separates the filter into a front part and a rear part. Therefore, it can be manufactured by complete integral molding, and the manufacturing cost is low.

Although the filter of the present embodiment is configured so that the body portion 15 can be elastically deformed, for example, each of the engaging portions 17 may be thinly formed to give elasticity to the engaging portion 17. Also,
As shown in FIG. 16, the engaging portion 17 of the filter of the present embodiment
Is formed so as to incline and project with respect to the body portion 15 like the filter of FIG. 7, and when the filter is inserted into the drainage hole H, the engaging portion 17 further inclines and bends. Good. Even when configured as above, each engaging part
If the 17 and the locking collar 16 are separated, each locking portion 17 can be freely elastically deformed without being hindered by the locking collar 16.

Further, the filter of the present embodiment was formed with the die-cutting hole 18 that opens rearward, but the point is that the locking collar 16 and each engaging portion 17
It suffices that a gap 19 is provided between the two and the two are separated and elastically deformable independently of each other.For example, a filter without the die-cutting hole 18 is molded, and then the locking collar of the filter is formed. You may cut | disconnect the junction part of 16 and each engaging part 17 and may form a clearance gap.

Further, the number of the engaging portions 5, 9, 17 in the filters of the first to third embodiments may be any number, and if at least one engaging portion is formed, the engaging action of the filter can be achieved.

On the other hand, the elastic blade 10 provided in the filter of the second embodiment may be added to the filter of the present embodiment.

[Effects of the Invention] As described in detail above, the sediment outflow prevention drainage filter of the present invention has an excellent effect that it is firmly engaged in the drainage hole and is unlikely to fall out from the hole.

[Brief description of the drawings]

1 to 4 show a first embodiment embodying the present invention, FIG. 1 is a sectional view showing a state in which a filter is attached to a drain hole, FIG. 2 is a front view of the filter, and FIG. Is a side view, FIG. 4 is a partially enlarged sectional view showing a deformed state of the engaging portion, FIG. 5 is a partially enlarged sectional view showing another example in which the thickness of the engaging portion is reduced, and FIG. FIG. 7 is a partially enlarged sectional view showing another example in which the thickness of the engaging portion is made thinner toward the tip thereof, and FIG. 7 is a partially enlarged sectional view showing another example in which the engaging portion is inclined with respect to the radial direction of the body portion. FIGS. 8 to 11 show an embodiment of a body embodying the present invention, FIG. 8 is a sectional view showing a state in which a filter is attached to a drain hole, and FIG. 9 is a front view of the filter. FIG. 10 is a side view of the same, FIG. 11 is an enlarged cross-sectional view showing a deformed state of the body, FIGS. 12 to 16 show a third embodiment of the present invention, and FIG. FIG. 13 is a front view of the filter, FIG. 14 is a side view of the filter as seen from the side of the perforated plate, and FIG. 15 is a modification showing a locking collar and an engaging portion. Are partially enlarged cross-sectional views showing the filter in a separated state, FIG. 16 is a side view showing another example in which the engaging portion is inclined with respect to the radial direction of the body, and FIG. 17 is a front view showing a conventional filter. , FIG. 18 is a side view of the same. Perforated plate 2,7,14, body portion 3,8,15, engaging portion 5,9,17, outer edge 5a, 9a,
17a, elastic blade 10, locking collar 16, gap 19, drainage hole H.

Claims (5)

(57) [Claims] 1. A cylindrical body (3) having a notch formed around a perforated plate (2) formed of a synthetic resin, and an object to be inserted on the outer periphery of the body (3). A plate extending in the insertion direction, which is the same as the radial direction of the body (3) or inclined with respect to the radial direction of the body (3) so as to elastically deform and engage with the drainage hole (H). A drainage filter for preventing outflow of sediment, which is formed with a hook-shaped engaging portion (5). 2. A cylindrical body (8) which is made of synthetic resin and has elasticity and is not cut around the perforated plate (7) and is formed on the outer periphery of the body (8). Is a drainage filter for preventing sediment outflow in which a plate-shaped engaging portion (9) extending substantially along the insertion direction is formed. 3. A perforated plate (14) is fixed to one end of a tubular body (15) which is molded from synthetic resin and has no notch, and a perforated plate (14) is provided on the outer periphery of the body (15). Is formed with a locking collar (16) connected to the outer peripheral edge of the body, and a plate-shaped engaging portion (17) extending substantially along the insertion direction is formed on the outer periphery of the body portion (15). A drainage filter for preventing outflow of sediment, wherein a gap (19) is formed between the portion (17) and the locking collar (16) to divide the two. 4. An outer edge (5a, 9a, 17) of the engaging portion (5, 9, 17).
The sediment filter for preventing sediment outflow according to any one of claims 1 to 3, wherein a) is inclined so that a height thereof becomes lower toward a front portion in the insertion direction. 5. A plurality of plate-shaped elastic blades (10) are provided on the open end side of the body portion (3, 8, 15) so as to expand. A drainage filter for preventing sediment outflow as described in.