JP7347804B2 - drain cap - Google Patents

Description

The present invention relates to a drain cap attached to a drain port for draining rainwater.

It is common for buildings such as buildings and condominiums to have drains installed on the rooftops and balconies on each floor to drain rainwater. Drain caps are installed to prevent the intrusion of solid objects such as fallen leaves, twigs, paper, or vinyl, to avoid danger from exposed drains, and to maintain aesthetic appearance.

As shown in FIG. 13, in the case of a conventional drain cap 1, a drain body 4 forms a drain port 3 for draining rainwater accumulated on the surface of a concrete frame 2 constituting the roof or balcony of a building. is buried, and a drain pipe (not shown) is connected directly below the drain body 4.

The drain port 3 is covered by a cap body 5 having a water-permeable structure, and the cap body 5 has a dome shape as shown in the figure and is provided with a plurality of openings 6 for letting rainwater pass through. A shaft portion 7 extending downward from the cap body 5 is provided on the bottom center of the top of the cap 5, and two leaf spring members 8 are fixed to the lower end of the shaft portion 7 with screws 9. The length of the leaf spring member 8 is sufficiently longer than the diameter of the drain port 3, and the two leaf spring members 8 are mounted so as to cross each other in a criss-cross pattern.

In addition, when installing the cap body 5 on the drain port 3, the worker bends the two leaf spring members 8 downward to make the drain port 3 narrower than the diameter of the drain port 3. When the leaf spring member 8 is released from the worker's hand at the time of insertion, the leaf spring member 8 expands due to its own elastic force and spreads around the inside of the drain port 3 ( The cap body 5 is fixed by being pressed against the inner peripheral surface of the cylindrical portion of the drain body 4.

However, the plate spring member 8 made of spring steel is prone to slipping due to point or line contact with the inner periphery of the drain port 3, and the drain cap 1 may come off from the drain port 3 due to a gust of wind such as a typhoon. Therefore, it has been proposed to surround the tip of the leaf spring member 8 with a resin-made anti-slip body to enhance the anti-slip effect (see Patent Document 1 below).

Utility model registration No. 3164857

However, since the anti-slip body surrounding the tip of the leaf spring member 8 also has a flat plate shape, the situation in which the anti-slip body makes point contact or line contact with the circumferentially curved surface of the drain port 3 still remains. The problem remains that the anti-slip effect cannot be as high as intended.

The present invention was made in view of the above-mentioned circumstances, and an object of the present invention is to significantly improve the anti-slip effect of the leaf spring member around the inside of the drain port compared to the conventional method, thereby preventing the drain cap from coming off. .

The present invention provides a cap body with a water-permeable structure that covers a drain port, and a cap body that extends downward from the cap body, is inserted into the drain port, and then opens by its own elastic force to open the cap body inside the drain port. A drain cap comprising a leaf spring member held in pressure contact with the periphery of the drain cap, and a slip prevention device made of elastic rubber attached at an appropriate position in the longitudinal direction of the leaf spring member, the slip prevention device comprising: a pressure contact portion forming a contact surface to the inner periphery of the leaf spring member, a holding portion responsible for mounting the plate spring member at an appropriate position in the longitudinal direction, and a connecting portion connecting the holding portion and the pressure contact portion, The present invention is characterized in that a displacement space for assisting elastic deformation of the pressure contact portion is interposed between at least both sides of the pressure contact portion in the width direction and the holding portion.

With this configuration, when the lower portions of each leaf spring member are narrowed toward each other and inserted into the drain port, each of the leaf spring members opens by its own elastic force. The cap body is pressed against the inner periphery of the drain port, thereby fixing the cap body in a state where it is installed on the drain port.

At this time, when each of the leaf spring members is brought into pressure contact with the inner periphery of the drain port via the anti-slip device, both widthwise sides of the pressure-contact portion of the anti-slip device are aligned with the curved surface in the circumferential direction of the drain port. As a result of the elastic deformation, most of the press-contact portion is press-contacted over a wide area around the interior of the drain port, thereby providing a high anti-slip effect.

Furthermore, even if the diameter of the drain port changes, the press-contact part of the slip preventer will elastically deform along the curved surface in the circumferential direction of the drain port. It is possible to always bring most of the pressure contact portion into pressure contact with the inner periphery of the drain port, and a high anti-slip effect is exhibited regardless of the diameter of the drain port.

Further, in the present invention, only the center portion of the pressure contact portion is connected to the holding portion via the connection portion, and a displacement space is provided to surround the connection portion, so that the pressure contact portion is configured to be able to freely swing and tilt in all directions. It is preferable that the

In this way, since the degree of opening of each leaf spring member differs depending on the diameter of the drain port, slipping can be prevented even if the angle of inclination at the pressure contact position of each of the leaf spring members with respect to the axial direction of the drain port varies. Since the press-contact part of the tool swings and tilts in all directions and is elastically deformed along the axial direction of the drain port, it becomes possible to more reliably press-contact most of the press-contact part.

Furthermore, in the present invention, it is preferable that the holding part has a hole with a diamond-shaped cross section through which the leaf spring member passes, and that the hole is formed so as to hold the width end of the leaf spring member under narrow pressure in a diagonal direction. In this way, by crushing the holding portion by applying force in a direction perpendicular to the surface of the leaf spring member, the hole having a rhombic cross section is flattened and extends in the width direction of the leaf spring member, and the hole is flattened and extended in the width direction of the leaf spring member. It becomes easy to slide the holding part in the longitudinal direction of the leaf spring member, making it easy to adjust the position, and when the holding part is stopped from being crushed, the hole with the diamond-shaped cross section returns to its original state, and the leaf spring member The width end is again held under narrow pressure and fixed.

Further, in the present invention, the leaf spring member has a narrowed constricted portion at an appropriate position in the longitudinal direction, and the holding portion has a groove into which the constricted portion is fitted, and is formed to form a lip groove-shaped cross section. In this way, the holding portion can be firmly fixed at an appropriate position in the longitudinal direction of the leaf spring member and can be prevented from easily shifting.

Furthermore, in the present invention, a protrusion that enhances the anti-slip effect may be formed on the contact surface of the pressure welding portion to the inner periphery of the drain port, and if this is done, the formation of the protrusion will prevent slippage. It becomes possible to further enhance the stopping effect.

According to the drain cap of the present invention, various excellent effects as described below can be achieved.

(I) According to the invention set forth in claim 1 of the present invention, when each leaf spring member is brought into pressure contact with the inner periphery of the drain port via the anti-slip device, both widthwise sides of the pressure-contact portion of the anti-slip device are The drainage port can be elastically deformed along the curved surface in the circumferential direction of the drain port, and most of the pressure contact portion can be brought into pressure contact with the internal periphery of the drain port over a wide range, regardless of the diameter of the drain port. The anti-slip effect of the leaf spring member against the inner periphery of the drain cap can be significantly improved compared to the conventional one, and the drain cap can be prevented from coming off.

(II) According to the invention described in claim 2 of the present invention, even if there are variations in the angle of inclination of each leaf spring member at the pressure contact position with respect to the axial direction of the drain port, the pressure contact portion of the anti-slip device can be completely removed. Since the drain port can be elastically deformed along the axial direction of the drain port by swinging and tilting in the direction, most of the pressure contact portion can be more reliably pressed against the inner periphery of the drain port.

(III) According to the third aspect of the present invention, by crushing the holding portion by applying force in a direction perpendicular to the surface of the leaf spring member, the leaf spring member can be easily slid in the longitudinal direction. In addition, simply by stopping the crushing of the holding portion, the width end of the leaf spring member can be held under narrow pressure again, and the plate spring member can be easily re-fixed.

(IV) According to the invention described in claim 4 of the present invention, since the protrusion is formed on the contact surface of the press-contact portion to the inner periphery of the drain port, the plate spring member slips around the inner periphery of the drain port. The stopping effect can be further enhanced.

FIG. 1 is a perspective view showing the first embodiment of the present invention in a state where it is removed from a drain port. FIG. 2 is a perspective view showing the leaf spring member of the drain cap of FIG. 1 in a contracted state. FIG. 3 is a sectional view showing a state in which the drain cap of FIG. 2 is attached to a drain port. FIG. 2 is a perspective view showing details of the anti-slip device attached to the leaf spring member of FIG. 1; FIG. 3 is a perspective view showing a second embodiment of the present invention. FIG. 3 is a perspective view showing a third embodiment of the present invention. It is a perspective view showing the fourth example of the present invention. FIG. 7 is a perspective view showing a fifth embodiment of the present invention. FIG. 6 is a perspective view showing a sixth embodiment of the present invention. FIG. 7 is a perspective view showing a seventh embodiment of the present invention. FIG. 7 is a perspective view showing an eighth embodiment of the present invention. FIG. 13 is a sectional view showing a state in which the drain cap of FIG. 12 is attached to a drain port. FIG. 2 is a sectional view showing a conventional example.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 4 show a first embodiment of the drain cap of the present invention, and parts with the same reference numerals as in FIG. 13 represent the same parts.

As shown in FIGS. 1 to 4, in the first embodiment as well, a drain body 4 forms a drainage port 3 for draining rainwater accumulated on the surface of a concrete frame 2 constituting the roof or balcony of a building. It is applicable to a site where a drain pipe (not shown) is buried and a drain pipe (not shown) is connected directly under the drain main body 4, and the drainage pipe is formed into a dome shape and equipped with a plurality of openings 6 for passing rainwater. A cap main body 5 having a water-permeable structure that covers the opening 3, and a cap main body 5 that is fixed to the lower end of a shaft portion 7 extending downward from the central lower surface of the top portion of the cap main body 5 with a screw 9 and overhanging downward from the cap main body 5 and the drain port 3. A drain cap is provided with a plate spring member 8 that is compressed and inserted into the inside of the drain cap, expands by its own elastic force, and comes into pressure contact with the inner periphery of the drain port 3 (the inner peripheral surface of the cylindrical portion of the drain main body 4). 10, slip prevention devices 11 made of elastic rubber are installed at appropriate positions in the longitudinal direction of the leaf spring member 8, and this slip prevention device 11 comes into contact with the inner periphery of the drain port 3. It is composed of a pressure contact part 12 forming a surface, a holding part 13 that is responsible for mounting the leaf spring member 8 at an appropriate position in the longitudinal direction, and a connecting part 14 that connects the holding part 13 and the pressure contact part 12, It is characterized in that a displacement space 15 for assisting elastic deformation of the pressure contact part 12 is interposed between both sides of the pressure contact part 12 in the width direction and the holding part 13.

In the example shown here, the pressure contact portion 12 of the anti-slip device 11 is formed into a flat plate shape, and the holding portion 13 has a lip groove-shaped cross section that holds both sides of the leaf spring member 8 in a slidable manner by sandwiching the same. In addition, the intermediate portions in the width direction of the pressure contact portion 12 and the holding portion 13 are connected to each other by a connecting portion 14 over the entire length of the slip prevention device 11, and the plate spring member The anti-slip device 11 can be mounted at any position in the longitudinal direction of the slider 8.

In this case, when the lower portions of each leaf spring member 8 are narrowed toward each other and inserted into the drain port 3, each leaf spring member 8 will exert its own elastic force. The cap main body 5 is opened and pressed against the inner periphery of the drain port 3, whereby the cap body 5 is fixed in a state installed on the drain port 3.

At this time, if each of the leaf spring members 8 is brought into pressure contact with the inner periphery of the drain port 3 via the anti-slip device 11, both sides in the width direction of the pressure contact portion 12 of the anti-slip device 11 are aligned in the circumferential direction of the drain port 3. As a result of the elastic deformation along the curved surface, most of the pressure contact portion 12 is brought into pressure contact with the inner periphery of the drain port 3 over a wide range, resulting in a high anti-slip effect.

Furthermore, even if the diameter of the drain port 3 changes, the pressure contact portion 12 of the anti-slip device 11 will elastically deform to follow this change and follow the curved surface in the circumferential direction of the drain port 3. It is possible to always bring most of the pressure contact portion 12 into pressure contact with the inner periphery of the drain port 3 of various diameters, and a high anti-slip effect is exhibited regardless of the diameter of the drain port 3.

Therefore, according to the first embodiment, when each leaf spring member 8 is brought into pressure contact with the inner periphery of the drain port 3 via the anti-slip device 11, both sides in the width direction of the pressure contact portion 12 of the anti-slip device 11 are drained. Because it is elastically deformed along the curved surface in the circumferential direction of the outlet 3, most of the pressure contact portion 12 can be brought into pressure contact with the inner periphery of the drain port 3 over a wide range, regardless of the diameter of the drain port 3. The anti-slip effect of the plate spring member 8 on the inner periphery of the drain port 3 can be greatly improved compared to the conventional one, and the drain cap 10 can be prevented from coming off.

Here, in the case of the anti-slip device 11 previously explained in detail with reference to FIG. 4, an example is shown in which the anti-slip device 11 can be attached to any position in the longitudinal direction of the leaf spring member 8. If it is desired to firmly fix the slip prevention device 11 at an optimal position in the longitudinal direction of the leaf spring member 8 according to the diameter of the drainage port 3 at the site, a second embodiment shown in FIG. 5 is used. , a narrowed constriction 16 is formed at an appropriate position in the longitudinal direction of the leaf spring member 8, and the holding portion 13 of the anti-slip device 11 has a groove 17 into which the constriction 16 is fitted, forming a lip groove shape. It may also be formed to form a cross section.

FIG. 6 shows a third embodiment of the present invention. In this third embodiment, only the center portion of the pressure contact portion 12 of the anti-slip device 11 is connected to the holding portion 13 via the connecting portion 14, and the A displacement space 15 is interposed to surround the connecting portion 14, and the pressure contact portion 12 is configured to be swingable and tiltable in all directions.

In this way, since the degree of opening of each plate spring member 8 differs depending on the diameter of the drain port 3, the angle of inclination of each plate spring member 8 at the pressure contact position with respect to the axial direction of the drain port 3 varies. Also, since the pressure contact portion 12 of the anti-slip device 11 swings in all directions and is elastically deformed along the axial direction of the drain port 3, the pressure contact portion 12 of the anti-slip device 11 swings in all directions and is elastically deformed along the axial direction of the drain port 3. Most of the parts can be pressed together more reliably.

FIG. 7 shows a fourth embodiment of the present invention, in which the holding portion 13 has a hole 18 with a rhombic cross section through which the leaf spring member 8 passes, and the hole 18 It is preferable that the width end of the leaf spring member 8 is held narrowly in the diagonal direction. (see A), the diamond-shaped hole 18 is flattened and extended in the width direction of the leaf spring member 8, and the holding portion 13 is slid in the longitudinal direction of the leaf spring member 8. Therefore, the position of the anti-slip device 11 can be easily adjusted. Moreover, simply by stopping the crushing of the holding portion 13, the width end of the leaf spring member 8 can be held under narrow pressure again. It can be fixed again.

Further, in the first to fourth embodiments described above, the contact surface of the pressure contact portion 12 of the anti-slip device 11 is a smooth surface, but the drain port 3 in the pressure contact portion 12 A protrusion that enhances the anti-slip effect, such as the contact surface of an athletic shoe, may be formed on the surface that comes into contact with the inner periphery.For example, as shown in the fifth embodiment in FIG. It is effective to form a plurality of extending protrusions 19 with a chevron-shaped cross section in a plurality of rows in the longitudinal direction, and to tilt the chevron-shaped cross section in the direction in which the leaf spring member 8 is removed (the direction in which it exits from the drain port 3).

Furthermore, as shown in a sixth embodiment in FIG. 9, a plurality of rows of protrusions 20 with a rectangular cross section extending in the width direction are formed in a row in the longitudinal direction, or as shown in a seventh embodiment in FIG. It is also possible to form the columnar protrusions 21 in a staggered manner, and in either case, the anti-slip effect can be further enhanced.

In the fifth to seventh embodiments, the intermediate portions in the width direction of the pressure contact portion 12 and the holding portion 13 are connected to each other by a connecting portion 14 over the entire length of the anti-slip device 11. In order to prevent the elastic deformation of the pressure contact part 12 from being inhibited by the formation of the projections 19, 20, 21, the projections 19, 20 may be divided into left and right parts, or may be formed in the middle of the pressure contact part 12 in the width direction. A V-shaped groove 22 is formed.

However, as shown in FIGS. 6 and 7, the pressure contact portion 12 formed with these protrusions 19, 20, and 21 should be supported by the connecting portion 14 only in the center so that it can swing and tilt in all directions. It goes without saying that the shapes of the projections are not limited to the three shapes shown in FIGS. 8 to 10.

Further, FIGS. 11 and 12 show an eighth embodiment of the present invention, and in the example shown here, leaf spring members 8 are individually installed at a plurality of locations on the lower inner circumference of the cap body 5, The plate spring members 8 form a drain cap 10 in which the opening area of the drain port 3 (see FIG. 12) is not narrowed as much as possible. It forms a support part 8a extending toward the center, and a portion beyond the support part 8a forms an expanded part 8b that opens in a direction away from the center of the cap body 5 as it goes downward.

Even with this configuration, when the expanded portions 8b of each leaf spring member 8 are narrowed toward each other and inserted into the drain port 3, each expanded portion 8b will release its own elasticity. It is opened by force and comes into pressure contact with the inner periphery of the drain port 3 via the anti-slip device 11, thereby fixing the cap body 5 in a state installed on the drain port 3.

At this time, both widthwise sides of the press-contact part 12 of the anti-slip device 11 are elastically deformed along the curved surface in the circumferential direction of the drain port 3, and most of the press-contact part 12 extends over a wide area with respect to the inner periphery of the drain port 3. As in the case of each of the embodiments described above, a high anti-slip effect can be obtained by being pressed against the surface.

Incidentally, the drain cap of the present invention is not limited to the above-described embodiment, and the plate spring member 8 to which the anti-slip device 11 is attached may be attached to the cap body 5 as shown in FIGS. 1 to 3. It may be fixed with a screw 9 to the lower end of the mandrel 7 extending downward from the central lower surface of the top, or it may be fixed individually at multiple locations on the lower inner circumference of the cap body 5 as shown in FIGS. 11 and 12. Alternatively, it is possible to take a format other than these, and it is not necessarily limited to the format shown in the drawings, and it goes without saying that various changes can be made without departing from the gist of the present invention. It is.

3 Drain port 5 Cap body 8 Leaf spring member 10 Drain cap 11 Anti-slip device 12 Pressure contact portion 13 Holding portion 14 Connection portion 15 Displacement space 16 Constriction portion 17 Groove 18 Hole 19 Projection portion 20 Projection portion 21 Projection portion

Claims (5)

A cap body with a water-permeable structure that covers a drain port, and a cap body that protrudes downward from the cap body, is inserted narrowly into the drain port, opens by its own elastic force, and is held in pressure contact around the inside of the drain port. A drain cap comprising a leaf spring member and a slip prevention device made of elastic rubber attached to an appropriate position in the longitudinal direction of the leaf spring member, the slip prevention device being provided with a pressure contact portion forming a contact surface of the plate spring member, a holding portion responsible for attaching the plate spring member to an appropriate position in the longitudinal direction, and a connecting portion connecting the holding portion and the pressure contact portion, and at least the pressure contact portion A drain cap characterized in that a displacement space for assisting elastic deformation of the pressure contact portion is interposed between both sides in the width direction of the drain cap and the holding portion. Only the central part of the press-contact part is connected to the holding part via the connection part, and a displacement space is interposed to surround the connection part, and the press-contact part is configured to be swingable and tiltable in all directions. The drain cap according to claim 1. Claim 1 or 2, wherein the holding portion has a hole with a diamond-shaped cross section through which the leaf spring member passes, and the hole is formed so as to hold the width end of the leaf spring member under narrow pressure in a diagonal direction. Drain cap as described in . A claim characterized in that the leaf spring member has narrowed constrictions at appropriate positions in the longitudinal direction, and the holding portion has a groove into which the constrictions are fitted, forming a lip groove-shaped cross section. The drain cap according to item 1 or 2. 5. The drain cap according to claim 1, wherein a protrusion for enhancing an anti-slip effect is formed on a surface of the press-contact portion that comes into contact with the inner periphery of the drain port.

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