JP2021130968A - Drain cap - Google Patents

Abstract

To prevent a drain cap from being pulled out by significantly improving the non-slip effect of a leaf spring member to the inner periphery of a drain port.SOLUTION: The present invention relates to a drain cap 10 equipped with: a cap body 5 of a water passing structure covering a drain port 3; a plate spring member 8 projecting downward from the cap body 5, inserted into the inside of the drain port 3 in a narrowed state, opened by its own elastic force, and held in pressure contact with the inner periphery of the drain port 3; and an anti-slip device 11 made of elastic rubber attached to an appropriate position in the longitudinal direction of the plate spring member 8. The anti-slip device 11 consists of a pressure contacting part 12 that forms a contact surface to the inner periphery of the drain port 3, a holding part 13 for mounting the plate spring member 8 at an appropriate position in the longitudinal direction, and a connecting part 14 that connects the holding part 13 to the pressure contacting part 12, with a displacement space 15 provided at least between both sides of the pressure contacting part 12 in the width direction and the holding part 13, the displacement space 15 to help elastic deformation of the pressure contacting part 12.SELECTED DRAWING: Figure 3

Description

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

Drains for draining rainwater are generally provided on the rooftops of buildings such as buildings and condominiums and on the balconies on each floor, and this type of drainage outlet is accompanied by rainwater. Drain caps are attached from the viewpoints of preventing the intrusion of solid objects such as fallen leaves, twigs, paper, vinyl, etc., avoiding the danger of exposing the drainage port, and maintaining the aesthetic appearance.

As shown in FIG. 13, in the case of the conventional drain cap 1, the drain body 4 is formed with a drain port 3 for discharging rainwater accumulated on the surface of the concrete skeleton 2 constituting the rooftop or balcony of the building. Is buried, and a drainage pipe (not shown) is connected directly below the drain body 4.

The drain port 3 is covered with a cap body 5 having a water flow structure, and the cap body 5 has a dome shape as shown and has a plurality of openings 6 for passing rainwater, and the cap body 5 is provided. A mandrel portion 7 extending below the cap body 5 is provided on the lower center of the top of the top 5, and two leaf spring members 8 are fixed to the lower end of the mandrel portion 7 with screws 9. The leaf spring member 8 has a length sufficiently longer than the diameter of the drain port 3, and is mounted in a state where the two leaf spring members 8 are overlapped so as to intersect each other in a cross.

Further, when the cap body 5 is installed on the drain port 3, the worker bends the two leaf spring members 8 downward and makes 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 the inside circumference of the drain port 3 ( The cap body 5 is fixed by pressure contacting the inner peripheral surface of the cylinder portion of the drain body 4.

However, the leaf spring member 8 made of spring steel is slippery due to point contact or line contact with the inner periphery of the drain port 3, and the drain cap 1 is pulled out from the drain port 3 due to a gust of wind caused by a typhoon or the like. Therefore, it has been proposed to surround the tip of the leaf spring member 8 with a resin 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 where the anti-slip body is in point contact or line contact with the curved surface in the circumferential direction of the drain port 3 still remains. There was a problem that it had not changed and it was not possible to obtain the high anti-slip effect as intended.

The present invention has been made in view of the above circumstances, and an object of the present invention is to significantly improve the anti-slip effect of the leaf spring member on the inner periphery of the drain port as compared with the conventional case, and to prevent the drain cap from being removed. ..

The present invention has a cap body having a water-flowing structure that covers the drain port, and a cap body that projects downward from the cap body and is narrowly inserted into the inside of the drain port and then opened by its own elastic force to open the inside of the drain port. A drain cap including a leaf spring member that is pressure-welded and held around and an anti-slip tool made of elastic rubber attached at an appropriate position in the longitudinal direction of the leaf spring member. The anti-slip tool is the drain port. It is composed of a pressure contact portion forming a contact surface with the inner periphery of the spring member, a holding portion for mounting the leaf spring member at an appropriate position in the longitudinal direction, and a connecting portion for connecting the holding portion and the pressure contact portion. It is characterized in that a displacement space that assists 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.

Thus, in this configuration, when the lower portions of the leaf spring members are narrowed in the direction close to each other and inserted into the drainage port, the leaf spring members are opened by their own elastic force. It is pressed against the inside of the drainage port, whereby the cap body is fixed in a state of being installed on the drainage port.

At this time, when each leaf spring member is pressed against the inside of the drain port via the anti-slip tool, both sides of the pressure contact portion of the anti-slip tool in the width direction are along the curved surface in the circumferential direction of the drain port. As a result of elastic deformation, most of the pressure-welded portion is pressure-welded to the inner periphery of the drainage port over a wide area, so that a high anti-slip effect can be obtained.

Even if the diameter of the drainage port changes, the pressure contact portion of the anti-slip tool is elastically deformed along the curved surface of the drainage port in the circumferential direction. It is possible to always press-contact most of the pressure-welding portion with respect to the inner periphery of the drainage port, and a high anti-slip effect is exhibited regardless of the diameter of the drainage port.

Further, in the present invention, only the central portion of the pressure contact portion is connected to the holding portion via the connecting portion, and a displacement space is interposed so as to surround the connecting portion, and the pressure contact portion is configured to swing and tilt in all directions. It is preferable that it is.

By doing so, the opening degree of each leaf spring member differs depending on the diameter of the drain port, so that even if the inclination angle of each leaf spring member at the pressure contact position with respect to the axial direction of the drain port varies, slip prevention is prevented. Since the pressure-welding portion of the tool swings and tilts in all directions and elastically deforms along the axial direction of the drain port, it is possible to more reliably press-contact the majority of the pressure-welding portion.

Further, in the present invention, it is preferable that the holding portion has a hole having a diamond-shaped cross section through which the leaf spring member is passed, and the hole is formed so as to hold the width end of the leaf spring member at a narrow pressure in the diagonal direction. In this way, by crushing the holding portion by applying a force in a direction perpendicular to the surface of the leaf spring member, the hole in the diamond-shaped cross section is flattened and extends in the width direction of the leaf spring member. The holding portion can be easily slid in the longitudinal direction of the leaf spring member to facilitate position adjustment, and if the crushing of the holding portion is stopped, the hole in the diamond-shaped cross section returns to the original state, so that the leaf spring member The width end of the spring is held again at a narrow pressure and fixed.

Further, in the present invention, the leaf spring member has a constricted portion having a narrowed width at an appropriate position in the longitudinal direction, while the holding portion has a groove into which the constricted portion is fitted and is formed so as to form a lip groove-shaped cross section. In this way, it is possible to firmly fix the holding portion at an appropriate position in the longitudinal direction of the leaf spring member so that the position does not easily shift.

Further, in the present invention, a protrusion that enhances the anti-slip effect may be formed on the contact surface of the pressure contact portion with respect to the inside of the drain port. It is possible to further enhance the stopping effect.

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

(I) According to the invention according to claim 1 of the present invention, when each leaf spring member is pressed against the inside of the drain port via the anti-slip tool, both sides of the pressure contact portion of the anti-slip tool in the width direction are pressed. It is elastically deformed along the curved surface in the circumferential direction of the drainage port, and most of the pressure contact portion can be pressure-welded to the inner periphery of the drainage port in a wide range regardless of the diameter of the drainage port. The anti-slip effect of the leaf spring member on the inner circumference of the drain cap can be significantly improved as compared with the conventional case, and the drain cap can be prevented from coming off.

(II) According to the invention according to claim 2 of the present invention, even if the inclination angle at the pressure contact position of each leaf spring member with respect to the axial direction of the drain port varies, the entire pressure contact portion of the anti-slip tool is covered. Since it 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, the holding portion is easily slid in the longitudinal direction of the leaf spring member by crushing the holding portion by applying a force in a direction perpendicular to the surface of the leaf spring member. Therefore, the position can be easily adjusted, and the width end of the leaf spring member can be held at a narrow pressure again by simply stopping the crushing of the holding portion, and the leaf spring member can be easily re-fixed.

(IV) According to the fourth aspect of the present invention, the leaf spring member slides with respect to the inner periphery of the drainage port by forming the protrusion on the contact surface of the pressure contact portion with the inner periphery of the drainage port. The stopping effect can be further enhanced.

It is a perspective view which shows the 1st Example of this invention in the state of being pulled out from the drain outlet. It is a perspective view which shows the leaf spring member of the drain cap of FIG. 1 in a narrowed state. It is sectional drawing which shows the state which attached the drain cap of FIG. 2 to a drain port. It is a perspective view which shows the detail of the anti-slip tool attached to the leaf spring member of FIG. It is a perspective view which shows the 2nd Embodiment of this invention. It is a perspective view which shows the 3rd Example of this invention. It is a perspective view which shows the 4th Embodiment of this invention. It is a perspective view which shows the 5th Example of this invention. It is a perspective view which shows the sixth embodiment of this invention. It is a perspective view which shows the 7th Example of this invention. It is a perspective view which shows the 8th Embodiment of this invention. It is sectional drawing which shows the state which attached the drain cap of FIG. 12 to a drain port. It is sectional drawing which shows the conventional example.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

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

As shown in FIGS. 1 to 4, also in the first embodiment, the drain body 4 is formed with a drain port 3 for draining rainwater accumulated on the surface of the concrete skeleton 2 constituting the roof of the building, the balcony, or the like. Is buried and a drainage pipe (not shown) is connected directly under the drain body 4, and the drainage is dome-shaped and has a plurality of openings 6 for allowing rainwater to pass through. The cap body 5 having a water-flowing structure covering the mouth 3 and the lower end of the mandrel portion 7 extending downward from the lower center of the top of the cap body 5 are fixed with screws 9 and project downward from the cap body 5 and the drain port 3 A drain cap provided with a leaf spring member 8 that is narrowed and inserted into the inside of the drainage port, spreads by its own elastic force, and presses against the inner circumference of the drainage port 3 (the inner peripheral surface of the cylinder portion of the drain body 4). Although it is 10, an anti-slip tool 11 made of elastic rubber is attached to the leaf spring member 8 at an appropriate position in the longitudinal direction, and the anti-slip tool 11 abuts on the inner periphery of the drain port 3. It is composed of a pressure contact portion 12 forming a surface, a holding portion 13 for mounting the leaf spring member 8 at an appropriate position in the longitudinal direction, and a connecting portion 14 for connecting the holding portion 13 and the pressure contact portion 12. It is characterized in that a displacement space 15 that assists elastic deformation of the pressure contact portion 12 is interposed between both sides of the pressure contact portion 12 in the width direction and the holding portion 13.

In the example shown here, a lip groove-shaped cross section in which the pressure contact portion 12 of the anti-slip tool 11 is formed in a flat plate shape and the holding portion 13 sandwiches both sides of the leaf spring member 8 in the width direction and holds them slidably. The leaf spring member is formed so as to form the above, and the intermediate portions in the width direction of the pressure contact portion 12 and the holding portion 13 are connected to each other by the connecting portion 14 over the entire length of the anti-slip tool 11. The anti-slip tool 11 can be attached to an arbitrary position in the longitudinal direction of 8.

Thus, in the case of such a configuration, when the lower portions of the leaf spring members 8 are narrowed in the directions close to each other and inserted into the drain port 3, each leaf spring member 8 has its own elastic force. The cap body 5 is fixed in a state of being installed on the drainage port 3 by pressing the cap body 5 around the inside of the drainage port 3.

At this time, when each leaf spring member 8 is pressed against the inside of the drain port 3 via the anti-slip tool 11, both sides of the pressure contact portion 12 of the anti-slip tool 11 in the width direction are in the circumferential direction of the drain port 3. As a result of elastic deformation along the curved surface of the drainage port 3, a high anti-slip effect can be obtained because most of the pressure contact portion 12 is pressure-welded to the inner periphery of the drain port 3 over a wide range.

Even if the diameter of the drainage port 3 changes, the pressure contact portion 12 of the anti-slip tool 11 is elastically deformed along the curved surface of the drainage port 3 in the circumferential direction. It is possible to always press-contact most of the pressure-welding portion 12 to the inner periphery of the drainage port 3 having various diameters, and a high anti-slip effect is exhibited regardless of the diameter of the drainage port 3.

Therefore, according to the first embodiment, when each leaf spring member 8 is pressed against the inside of the drain port 3 via the anti-slip tool 11, both sides of the pressure contact portion 12 of the anti-slip tool 11 are drained in the width direction. Since it can be elastically deformed along the curved surface of the drainage port 3 in the circumferential direction, most of the pressure contact portion 12 can be pressure-welded to the inner periphery of the drainage port 3 over a wide range regardless of the diameter of the drainage port 3. The anti-slip effect of the leaf spring member 8 on the inner periphery of the drain port 3 can be significantly improved as compared with the conventional case, and the drain cap 10 can be prevented from being pulled out.

Here, in the case of the anti-slip tool 11 described in detail in FIG. 4, an example is shown in which the anti-slip tool 11 can be attached to an arbitrary position in the longitudinal direction of the leaf spring member 8. When it is desired to firmly fix the anti-slip tool 11 at the optimum position in the longitudinal direction of the leaf spring member 8 according to the diameter of the drain port 3 at the site, as in the second embodiment shown in FIG. , While forming a constricted portion 16 having a narrowed width at an appropriate position in the longitudinal direction of the leaf spring member 8, the holding portion 13 of the anti-slip tool 11 has a groove 17 into which the constricted portion 16 is fitted, and has a lip groove shape. It may be formed so as to form a cross section.

FIG. 6 shows a third embodiment of the present invention. In this third embodiment, only the central portion of the pressure contact portion 12 of the anti-slip tool 11 is connected to the holding portion 13 via the connecting portion 14 and described above. A displacement space 15 is interposed so as to surround the connecting portion 14, and the pressure contact portion 12 is configured to swing and tilt in all directions.

In this way, the opening degree of each leaf spring member 8 differs depending on the diameter of the drain port 3, and the inclination angle of each leaf spring member 8 at the pressure contact position with respect to the axial direction of the drain port 3 varies. However, since the pressure contact portion 12 of the anti-slip tool 11 swings and tilts in all directions and elastically deforms along the axial direction of the drain port 3, the pressure contact portion 12 of the pressure contact portion 12 with respect to the inner periphery of the drain port 3. Most of them can be pressure-welded more reliably.

FIG. 7 shows a fourth embodiment of the present invention. In the fourth embodiment, the holding portion 13 has a hole 18 having a diamond-shaped cross section through which the leaf spring member 8 passes, and the hole 18 is the leaf spring member. It is preferable that the width end of 8 is formed so as to hold the width end diagonally at a narrow pressure, and in this way, the holding portion 13 is held in a direction perpendicular to the surface of the leaf spring member 8 (arrow in FIG. 7). (See A) is crushed by applying a force to flatten the hole 18 having a diamond-shaped cross section, extend in the width direction of the leaf spring member 8, and slide the holding portion 13 in the longitudinal direction of the leaf spring member 8. Therefore, the position of the anti-slip tool 11 can be easily adjusted, and the width end of the leaf spring member 8 can be easily held at a narrow pressure only by stopping the crushing of the holding portion 13. It can be fixed again.

Further, in the first to fourth embodiments described above, the case where the contact surface of the pressure contact portion 12 of the anti-slip tool 11 is a smooth surface is illustrated, but the drain port 3 in the pressure contact portion 12 is illustrated. A protrusion that enhances the anti-slip effect, such as a ground contact surface of athletic shoes, may be formed on the contact surface with the inner periphery of the sneaker, for example, in the width direction as shown in FIG. It is effective to form a plurality of rows of protruding portions 19 having a chevron cross section extending in the longitudinal direction, and particularly to form the chevron cross section by tilting it in the direction of withdrawal of the leaf spring member 8 (direction of exiting from the drain port 3).

Further, as shown in the sixth embodiment in FIG. 9, a plurality of protrusions 20 having a rectangular cross section extending in the width direction are arranged side by side in the longitudinal direction, or a plurality of circles as shown in the 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.

Here, 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 the connecting portion 14 over the entire length of the anti-slip tool 11. Since it is shown in the form, the protrusions 19, 20 are divided into left and right, or in the middle in the width direction of the pressure contact portion 12 so that the elastic deformation of the pressure contact portion 12 is not hindered by the formation of the protrusions 19, 20, 21. A V-shaped groove 22 is formed.

However, as shown in FIGS. 6 and 7, the pressure contact portion 12 forming these protrusions 19, 20, and 21 is supported by the connecting portion 14 so as to swing and tilt in all directions only at the central portion. Of course, the shape of the protrusion is not limited to the three types shown in FIGS. 8 to 10.

11 and 12 show an eighth embodiment of the present invention. In the example shown here, leaf spring members 8 are individually provided at a plurality of locations on the lower inner circumference of the cap body 5. The drain cap 10 is such that the opening area of the drain port 3 (see FIG. 12) is not narrowed as much as possible by the leaf spring members 8, and the upper end of each leaf spring member 8 is the cap body 5. A support portion 8a extending toward the center is formed, and a portion beyond the support portion 8a forms a development portion 8b that opens in a direction away from the center of the cap body 5 as it goes downward.

Therefore, even in such a configuration, when the deploying portions 8b of the leaf spring members 8 are narrowed in the directions close to each other and inserted into the drain port 3, each deploying portion 8b repels itself. It opens by force and is pressed against the inner periphery of the drainage port 3 via the anti-slip tool 11, whereby the cap body 5 is fixed in a state of being installed on the drainage port 3.

At this time, both sides of the pressure contact portion 12 of the anti-slip tool 11 are elastically deformed along the curved surface in the circumferential direction of the drain port 3, and most of the pressure contact portion 12 has a wide range with respect to the inner circumference of the drain port 3. It is the same as in the case of each of the examples described so far that a high anti-slip effect can be obtained by being pressure-welded to.

The drain cap of the present invention is not limited to the above-described embodiment, and the leaf spring member 8 to which the anti-slip tool 11 is mounted is the cap body 5 as shown in FIGS. 1 to 3. It may be fixed to the lower end of the mandrel portion 7 extending downward from the lower center of the top with screws 9, or it may be individually fixed to a plurality of locations on the lower inner circumference of the cap body 5 as shown in FIGS. 11 and 12. Alternatively, it is possible to use a format other than these, and it is not necessarily limited to the format shown in the drawing, and it goes without saying that various changes can be made without departing from the gist of the present invention. Is.

3 Drainage port 5 Cap body 8 Leaf spring member 10 Drain cap 11 Anti-slip device 12 Pressure welding part 13 Holding part 14 Connecting part 15 Displacement space 16 Constriction part 17 Groove 18 Hole 19 Protrusion part 20 Protrusion part 21 Protrusion part

Claims (5)

A cap body with a water flow structure that covers the drain port, and a cap body that projects downward from the cap body and is narrowed and inserted inside the drain port, then opens by its own elastic force and is held by pressure contact around the inside of the drain port. A drain cap including a leaf spring member to be formed and an anti-slip device made of elastic rubber attached at an appropriate position in the longitudinal direction of the leaf spring member, and the anti-slip device is moved to the inner periphery of the drain port. It is composed of a pressure contact portion forming the contact surface of the leaf spring member, a holding portion for mounting the leaf spring member at an appropriate position in the longitudinal direction, and a connecting portion for 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 that assists elastic deformation of the pressure contact portion is interposed between both sides in the width direction of the spring cap and the holding portion. Only the central portion of the pressure-welding portion is connected to the holding portion via the connecting portion, and a displacement space is interposed so as to surround the connecting portion, and the pressure-welding portion is configured to swing and tilt in all directions. The drain cap according to claim 1. 1. The drain cap described in. A claim characterized in that the leaf spring member has a constricted portion narrowed in width at an appropriate position in the longitudinal direction, while the holding portion has a groove for fitting the constricted portion and is formed so as to form a lip groove-shaped cross section. Item 2. The drain cap according to Item 1 or 2. The drain cap according to claim 1, 2, 3 or 4, wherein a protrusion that enhances the anti-slip effect is formed on the contact surface of the pressure contact portion with respect to the inside of the drain port.

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