JP2022177528A - drain cap - Google Patents

Abstract

To provide a drain cap facilitating an insertion of a plate spring member into an exhaust port while improving nonslip effect of the plate spring member to the inside surrounding of the exhaust port significantly than before.SOLUTION: A drain cap 10 comprises a cap body 5 covering an exhaust port 3 in water communication structure, a plate spring member 8 extending toward a side opposite to the exhaust port 3 from the cap body 5 and made narrower and inserted to the inside of the exhaust port 3, then expanded by resilient force of itself and compressed and held at the inside surrounding of the exhaust port 3 and a nonslip tool 11 constituting an elastic rubber attached at a longitudinal direction suitable position of the plate spring member 8, and the plate spring member 8 is arranged in the state where an auxiliary plate spring 8a shorter than a longitudinal dimension of itself is overlapped at the side opposite to the exhaust port 3, and respective longitudinal direction intermediate parts of the plate spring member 8 and the auxiliary plate spring 8a are fastened together and fixed at a suitable place of the cap body 5 side, and the nonslip tool 11 is attached at a range non overlapping with the auxiliary plate spring 8a of the plate spring member 8.SELECTED DRAWING: Figure 3

Description

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

The roof of buildings such as buildings and condominiums and the balconies of each floor are generally provided with drains for draining rainwater. Drain caps are attached from the viewpoints of preventing entry of solid matter such as fallen leaves, twigs, paper, vinyl, etc., avoiding the risk of the drain port being exposed, and maintaining a beautiful appearance.

As shown in FIG. 13, in the case of a conventional drain cap 1, a drain main body 4 is formed with a drain port 3 for discharging rainwater accumulated on the surface of a concrete frame 2 constituting a roof of a building, a balcony, or the like. is buried, and a drain 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-permeable structure. The cap body 5 has a dome shape as shown in the figure and has a plurality of openings 6 for passing rainwater. A central rod portion 7 extending downward from the cap main body 5 is provided on the lower central surface of the top portion of the cap 5, and two leaf spring members 8 are fixed to the lower end of the shaft portion 7 with screws 9. As shown in FIG. 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 in a state of being overlapped so as to cross each other.

When installing the cap main body 5 on the drain port 3, a 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 operator's hand at the time of insertion, the leaf spring member 8 spreads due to its own elastic force, and the inner periphery of the drain port 3 ( The cap main body 5 is fixed by pressing against the inner peripheral surface of the cylindrical portion of the drain main body 4 .

However, the plate spring member 8 made of spring steel tends to slip in point contact or line contact with the inner periphery of the drain port 3, and the drain cap 1 may slip out of the drain port 3 due to a gust of wind caused by a typhoon or the like. Since there is a risk that the leaf spring member 8 will be lost, 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 where the anti-slip body comes into point contact or line contact with the curved surface around the inside of the drain port 3 still remains. There was a problem that it was not possible to obtain a high anti-slip effect as intended.

Therefore, the present inventors provided a new anti-slip device for the leaf spring member 8, elastically deforming the anti-slip device along the curved surface of the inner periphery of the drain port 3, and pressed it over a wide range. I have already applied for this as Japanese Patent Application No. 2020-26853. , it became difficult to insert into the drain port 3 as a new problem.

That is, when the anti-slip member is attached to the leaf spring member 8 , the anti-slip member presses against the inner periphery of the drain port 3 when inserted into the drain port 3 and is caught. However, if the resilience of the plate spring member 8 is weakened to avoid this, the anti-slip effect of the drain cap 1 after installation may be weakened.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and is intended to facilitate the insertion of the leaf spring member into the drain port while greatly improving the anti-slip effect of the leaf spring member against the inner periphery of the drain port. An object of the present invention is to provide a smooth drain cap.

The present invention includes a cap body having a water-permeable structure that covers a drain port, and a cap body that protrudes from the cap body toward the side facing the drain port, is narrowed and inserted into the drain port, and is deployed by its own elastic force. A drain cap comprising: a leaf spring member press-contacted and held around the inside of the drain port; The spring member is provided with an auxiliary leaf spring shorter than its own longitudinal dimension in a state of being superimposed on the side facing the drain port, and the longitudinal intermediate portions of the leaf spring member and the auxiliary leaf spring are located on the side of the cap main body. It is characterized in that the anti-slip member is attached to a range of the leaf spring member that does not overlap with the auxiliary leaf spring while being fixed together by fastening at an appropriate location.

With this arrangement, the leaf spring member and the auxiliary leaf spring work together to exert an elastic force necessary to prevent the drain cap from coming off the drain port. It is possible to relatively reduce the rigidity of the leaf spring member in the range where it does not overlap with the auxiliary leaf spring.

As a result, when the plate spring member is narrowed and inserted into the drain port, even if the anti-slip device is caught around the inside of the drain port, the rigidity within the range where the anti-slip device is attached is maintained. is relatively low, the tip side of the leaf spring member bends inward and escapes, thereby immediately eliminating the catching of the anti-slip member and facilitating the pushing of the leaf spring member.

On the other hand, after the leaf spring member is inserted, the auxiliary leaf spring, which is superimposed on the longitudinal intermediate portion of the leaf spring member, continuously assists the elastic force to provide the necessary elastic force. Since the generated force is secured, the anti-slipping member strongly pressed against the inner periphery of the drain port exerts a high anti-slip effect, effectively preventing the drain cap from coming off from the drain port.

Further, in the concrete implementation of the drain cap of the present invention, the anti-slip member includes a pressure contact portion forming a contact surface against the inner circumference of the drain port, and a holding portion responsible for mounting the plate spring member at an appropriate position in the longitudinal direction. and a connecting portion that connects the holding portion and the pressure contact portion. Displacement spaces for assisting elastic deformation of the pressure contact portion are interposed between at least both sides of the pressure contact portion in the width direction and the holding portion. It is preferable that

With this configuration, when the leaf spring member is pressed against the inner periphery of the drain port via the anti-slip device, both sides in the width direction of the pressure contact portion of the anti-slip device follow the curved surface in the circumferential direction of the drain port. As a result of such elastic deformation, most of the press-contact portion is press-contacted to the inner periphery of the drain port in a wide range, thereby obtaining a high anti-slip effect.

Even if the diameter of the drain port changes, the press-contact portion of the anti-slip device will elastically deform along the curved surface of the drain port in the circumferential direction. A large part of the pressure contact portion can always be brought into pressure contact with the inner periphery of the drain port, and a high anti-slip effect can be exhibited regardless of the diameter of the drain 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, so that the pressure contact portion can swing and tilt in all directions. It is preferable that

In this way, even if the angle of inclination of the leaf spring member at the pressure contact position with respect to the axial direction of the drain port varies due to the difference in the degree of opening of the leaf spring member depending on the diameter of the drain port, the anti-slip device can be used. Since the pressure contact portion swings and tilts in all directions and is elastically deformed along the axial direction of the drain port, most of the pressure contact portion can be more reliably pressed.

Further, in the present invention, it is preferable that the holding portion has a hole with a rhombic 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 in a diagonal direction. With this configuration, the holding portion is crushed by applying a force in a direction perpendicular to the plane of the leaf spring member, thereby flattening the rhombic cross-sectional hole and extending it 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 positional adjustment. When the holding portion is stopped from being crushed, the hole of the rhombic cross section returns to its original state, thereby restoring the leaf spring member. The width end of the is again held under narrow pressure and fixed.

Further, in the present invention, the leaf spring member has a constricted portion with a narrowed width at an appropriate position within a range not overlapping the auxiliary leaf spring, and the holding portion has a groove into which the constricted portion is fitted, and has a lip groove-shaped cross section. In this way, the holding portion can be firmly fixed to the constricted portion of the leaf spring member so as not to be easily dislocated.

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

ADVANTAGE OF THE INVENTION According to the drain cap of this invention, there can exist various excellent effects as follows.

(I) According to the first aspect of the present invention, when the leaf spring member is narrowed and inserted into the drain port, even if the anti-slip member is caught around the inner periphery of the drain port, Since the tip side of the leaf spring member bends inward and escapes, the catching of the anti-slip device is immediately eliminated, making it easier to push in the leaf spring member. The necessary elastic force is ensured by continuously assisting the elastic force with the auxiliary leaf spring that is superimposed on the longitudinal intermediate portion, so that the leaf spring member can be applied to the inner periphery of the drain port. It is possible to facilitate the insertion of the leaf spring member into the drain port while greatly improving the anti-slip effect as compared with the prior art.

(II) According to the invention of claim 2 of the present invention, when the leaf spring member is pressed against the inner periphery of the drain port via the anti-slip device, the width direction both sides of the pressure contact portion of the anti-slip device are drained. It is elastically deformed along the curved surface of the outlet in the circumferential direction, and the majority of the press-contact portion can be widely pressed against the inner periphery of the drain regardless of the diameter of the drain. It is possible to exhibit a highly practical non-slip effect on the inner periphery.

(III) According to the third aspect of the present invention, even if there is variation in the inclination angle of the pressure contact position of the leaf spring member with respect to the axial direction of the drain, Since it can be swung and tilted to elastically deform along the axial direction of the drain port, most of the pressure contact portion can be more reliably pressed against the inner periphery of the drain port.

(IV) According to the fourth aspect of the present invention, the holding portion is crushed by applying a force in a direction perpendicular to the surface of the leaf spring member so that the leaf spring member can be easily slid in the longitudinal direction. Further, the width end of the leaf spring member can be held again under narrow pressure simply by stopping the crushing of the holding portion, and can be easily refixed.

(V) According to the invention of claim 5 of the present invention, a constricted portion with a reduced width is formed at an appropriate position within a range not overlapping the auxiliary leaf spring of the leaf spring member, and the holding portion fits the constricted portion. Since the retaining groove is provided to form a lip groove-shaped cross section, the retaining portion can be firmly fixed to the constricted portion of the leaf spring member so as not to be easily dislocated.

(VI) According to the invention of claim 6 of the present invention, by forming a projection on the contact surface of the press contact portion that contacts the inner periphery of the drain port, the leaf spring member slides against the inner periphery of the drain port. The stopping effect can be further enhanced.

1 is a perspective view showing the first embodiment of the present invention withdrawn from a drain port; FIG. FIG. 2 is a perspective view showing a state in which a plate spring member of the drain cap of FIG. 1 is narrowed; FIG. 3 is a cross-sectional view showing a state in which the drain cap of FIG. 2 is attached to the drain port; FIG. 2 is a perspective view showing details of an anti-slip device attached to the leaf spring member of FIG. 1; FIG. 4 is a perspective view showing a second embodiment of the present invention; FIG. 11 is a perspective view showing a third embodiment of the present invention; It is a perspective view which shows the 4th Example of this invention. It is a perspective view which shows the 5th Example of this invention. It is a perspective view showing a sixth embodiment of the present invention. FIG. 11 is a perspective view showing a seventh embodiment of the present invention; It is a perspective view showing an eighth embodiment of the present invention. FIG. 12 is a perspective view showing a non-mounted state of the drain cap of FIG. 11; FIG. 10 is a cross-sectional view showing a conventional example;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

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

As shown in FIGS. 1 to 3, also in the first embodiment, a drain body 4 forming a drain port 3 for draining rainwater accumulated on the surface of a concrete frame 2 constituting a roof of a building, a balcony, or the like. is buried, and a drainage pipe (not shown) is connected directly below the drain body 4, and the drainage A cap body 5 having a water-permeable structure covering the mouth 3; and a leaf spring member 8 which is narrowed and inserted into the interior of the drain cap, expands by its own elastic force, and presses against the inner periphery of the drain port 3 (the inner peripheral surface of the cylindrical portion of the drain body 4). 10, the leaf spring member 8 is equipped with an auxiliary leaf spring 8a shorter than its own longitudinal dimension in a state of being superimposed on the lower surface side (the side facing the drain port 3), and the leaf spring The intermediate portions in the longitudinal direction of the member 8 and the auxiliary leaf spring 8a are fixed to the lower end of the mandrel portion 7 via screws 9. A non-slip member 11 made of elastic rubber is attached to the area where they do not overlap.

As shown in an enlarged view in FIG. 4, the anti-slip device 11 comprises a press-contact portion 12 forming a contact surface against the inner periphery of the drain port 3 and a plate spring member 8 mounted at an appropriate position in the longitudinal direction. and a connecting portion 14 connecting between the holding portion 13 and the pressure contact portion 12, and between the pressure contact portion 12 and the holding portion 13, the pressure contact portion 12 A displacement space 15 is interposed to assist the elastic deformation of the .

In the example shown here, the pressure contact portion 12 of the anti-slip member 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 to hold it slidably. , 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 a connecting portion 14 over the entire length of the anti-slip device 11, and the leaf spring member The anti-slip device 11 can be attached to any position within a range not overlapping the auxiliary leaf spring 8a.

By doing so, the leaf spring member 8 and the auxiliary leaf spring 8a cooperate to exert the elastic force necessary to prevent the drain cap 10 from coming off from the drain port 3. , the rigidity of the leaf spring member 8 in a range not overlapping with the auxiliary leaf spring 8a can be relatively reduced. , even if the anti-slip device 11 is caught around the inside of the drain port 3, the tip of the leaf spring member 8 can be secured because the rigidity in the range where the anti-slip device 11 is attached is relatively low. The side bends inward and escapes, thereby immediately eliminating the catching of the anti-slip member 11 and making it easier to push in the leaf spring member 8.例文帳に追加

Further, after the leaf spring member 8 is inserted, the auxiliary leaf spring 8a, which is superimposed on the longitudinal intermediate portion of the leaf spring member 8, continuously assists the resilient force. Since the necessary elastic force is ensured, the anti-slip member 11 strongly pressed against the inner periphery of the drain port 3 exerts a high anti-slip effect, effectively preventing the drain cap 10 from coming off the drain port 3. will be

That is, when each of the leaf spring members 8 is pressed against the inner periphery of the drain port 3 via the anti-slip member 11, both sides in the width direction of the pressure contact portion 12 of the anti-slip member 11 are aligned with the curved surface of the drain port 3 in the circumferential direction. As a result of the elastic deformation, most of the press contact portion 12 is pressed against the inner periphery of the drain port 3 in a wide range, thereby obtaining a high anti-slip effect.

Even if the diameter of the drain port 3 changes, the press-contact portion 12 of the anti-slip device 11 is elastically deformed so as to follow the curved surface of the drain port 3 in the circumferential direction. A large part of the pressure contact portion 12 can always be brought into pressure contact with the inner periphery of the drain port 3 of various diameters, and a high anti-slip effect can be exhibited regardless of the diameter of the drain port 3.例文帳に追加

Therefore, according to the first embodiment, when the plate spring member 8 is narrowed and inserted into the drain port 3, even if the anti-slip member 11 is caught around the inner periphery of the drain port 3, the plate can be removed. Since the tip side of the spring member 8 bends inward and escapes, the catching of the anti-slip member 11 is immediately eliminated and the leaf spring member 8 can be easily pushed. The necessary elastic force is ensured by continuously assisting the elastic force of the auxiliary leaf spring 8a superimposed on the longitudinally intermediate portion of the member 8. It is possible to facilitate the insertion of the leaf spring member 8 into the drain port 3 while greatly improving the anti-slip effect of the leaf spring member 8 against the water.

In addition, when each leaf spring member 8 is pressed against 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 along the curved surface of the drain port 3 in the circumferential direction. , and the majority of the press contact portion 12 can be pressed against the inner periphery of the drain port 3 in a wide range regardless of the diameter of the drain port 3. A highly practical anti-slip effect can be exhibited.

Here, in the case of the anti-slip member 11 previously explained in detail with reference to FIG. However, if it is desired to firmly fix the anti-slip member 11 at the optimum position according to the diameter of the drainage port 3 at the site, the second embodiment shown in FIG. A constricted portion 16 having a reduced width is formed at an appropriate position within a range not overlapping the auxiliary leaf spring of the leaf spring member 8, and the holding portion 13 of the anti-slip device 11 has a groove 17 in which the constricted portion 16 is fitted. It may be formed so as to form a lip channel 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 device 11 is connected to the holding portion 13 via the connecting portion 14 and 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 degree of opening of each leaf spring member 8 differs depending on the diameter of the drain port 3, so that the inclination angle of each leaf spring member 8 with respect to the axial direction of the drain port 3 varies. Also, since the press-contact portion 12 of the anti-slip device 11 swings and tilts in all directions and is elastically deformed along the axial direction of the drain port 3, the press-contact portion 12 does not move against the inner circumference of the drain port 3. Most of them can be press-contacted more reliably.

FIG. 7 shows a fourth embodiment of the present invention, in which the retainer 13 has a hole 18 of rhomboid cross-section through which the leaf spring member 8 passes, and the hole 18 extends through the leaf spring member. It is preferable that the width end of the plate spring member 8 is formed so as to hold the widthwise ends of the plate spring member 8 with a narrow pressure in the diagonal direction. A) is crushed by applying force to flatten the hole 18 with the rhombus cross section and extend in the width direction of the leaf spring member 8, so that the holding portion 13 slides in the longitudinal direction of the leaf spring member 8. Therefore, the position of the anti-slip member 11 can be easily adjusted, and the width end of the leaf spring member 8 can be easily held again by narrowly holding the holding portion 13 simply by stopping the crushing of the holding portion 13. 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 member 11 is a smooth surface. The contact surface to the inner periphery of the may be formed with a protrusion that enhances the anti-slip effect like the contact surface of sports shoes. For example, as shown in FIG. 8 as a fifth embodiment, It is effective to arrange a plurality of extending projections 19 having a chevron cross-section in the longitudinal direction, and form the chevron cross-sections by tilting them in the removal direction of the leaf spring member 8 (the direction in which the plate spring member 8 is removed from the drain port 3).

Furthermore, as shown in FIG. 9 as a sixth embodiment, a plurality of rows of projections 20 having a rectangular cross section extending in the width direction are arranged in the longitudinal direction, or as shown in FIG. The columnar protrusions 21 can also be formed in a zigzag pattern, and in either case, the anti-slip effect can be further enhanced.

Here, in the fifth embodiment to the seventh embodiment, 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 device 11. Therefore, the projections 19, 20 may be divided into left and right parts, or may be formed in the middle of the width direction of the pressure contact part 12 so that the elastic deformation of the pressure contact part 12 is not hindered by the formation of the projections 19, 20, 21. A V-shaped groove 22 is formed.

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

Further, FIGS. 11 and 12 show an eighth embodiment of the present invention. In the first to seventh embodiments described above, it is assumed that the drain port 3 is vertically opened in a horizontal plane. Although the vertical drain type drain cap 10 is described, in the eighth embodiment of FIGS. 11 and 12, the drain port 3 (the drain channel itself is The object is a drain cap 10 of a side-drawing drain type assumed to be attached to a drain cap 10 formed with a downward slope toward the inner side.

In the drain cap 10 of such a horizontal drain type, the cap body 5 must have a water-permeable structure so as to be able to cover the drain port 3 opened sideways at the corner formed by the horizontal plane and the vertical plane. , the cap body 5 has a shape different from that of the vertical drain type shown in the figure, and more specifically, it obliquely crosses between the horizontal plane and the vertical plane at the corner in front of the drain port 3 . It has a form consisting of a rectangular slope and triangular side surfaces that shield both sides thereof, and has a water passage structure with a plurality of openings 6 for passing rainwater. A base end of an arm portion 23 is tiltably connected to the center of the side facing the . By tilting the arm portion 23 with respect to the slope of the cap body 5 and tilting the tilting piece 24 with respect to the tip of the arm portion 23, it is possible to cope with differences in diameter and gradient of the drain port 3. There is.

Also in the eighth embodiment, in which the drain cap 10 is of the horizontal drain type, the auxiliary leaf spring 8a, which is shorter than the longitudinal dimension of the leaf spring member 8, is superimposed on the side facing the drain port 3. , and the mutual longitudinal intermediate portions of the leaf spring member 8 and the auxiliary leaf spring 8a are fixed to the tilting piece 24 via screws 9 by tightening together, and the leaf spring member 8 A non-slip member 11 made of elastic rubber is mounted in a range that does not overlap with the auxiliary leaf spring 8a.

The anti-slip device 11 has a press-contact portion 12 forming a contact surface against the inner periphery of the drain port 3, and the plate spring member 8 mounted at an appropriate position in the longitudinal direction. and a connecting portion 14 connecting between the holding portion 13 and the pressure contact portion 12 . A displacement space 15 for assisting elastic deformation is interposed, and in the case of the example shown here, the holding portion 13 is a hole 18 (Figs. 10), and the holes 18 are formed to hold the width ends of the leaf spring members 8 in the diagonal direction.

Therefore, even when the drain cap 10 of such a horizontal drain type is intended, the elastic force necessary to prevent the drain cap 10 from coming off from the drain port 3 is provided by the leaf spring member 8 and the auxiliary member. It is possible to relatively reduce the rigidity of the leaf spring member 8 in the range where it does not overlap with the auxiliary leaf spring 8a, so that the leaf spring member 8 can be narrowed. Even if the anti-slip device 11 is caught around the inside of the drain port 3 when it is inserted into the drain port 3, the rigidity in the range where the anti-slip device 11 is attached is relatively low. As a result, the tip side of the leaf spring member 8 bends inward and escapes, thereby immediately eliminating the catching of the anti-slip member 11 and facilitating the pushing of the leaf spring member 8.例文帳に追加

Further, after the leaf spring member 8 is inserted, the auxiliary leaf spring 8a, which is superimposed on the longitudinal intermediate portion of the leaf spring member 8, continuously assists the resilient force. Since the necessary elastic force is ensured, the anti-slip member 11 strongly pressed against the inner periphery of the drain port 3 exerts a high anti-slip effect, effectively preventing the drain cap 10 from coming off the drain port 3. will be

At this time, both sides in the width direction of the press-contact portion 12 of the anti-slip device 11 are elastically deformed along the curved surface of the drain port 3 in the circumferential direction, and most of the press-contact portion 12 extends over a wide area around the inner periphery of the drain port 3 . A high anti-slip effect can be obtained by being pressed against the vertical drain type drain cap 10 described above.

It should be noted that the drain cap of the present invention is not limited to the above-described embodiments, and structures other than those shown in the drawings can be applied to the anti-slip device. Of course, various changes can be made within the scope.

3 Drain Port 5 Cap Body 7 Mandrel 8 Leaf Spring Member 8a Leaf Spring Member 10 Drain Cap 11 Slip Prevention Tool 12 Pressure Contact Part 13 Holding Part 14 Connecting Part 15 Displacement Space 16 Constricted Part 17 Groove 18 Hole 19 Projection 20 Projection 21 protrusion

Claims (6)

a cap body having a water-permeable structure covering a drain port; a cap body projecting from the cap body to a side facing the drain port; being narrowed and inserted into the drain port; A drain cap comprising a leaf spring member press-contacted and held around an inner periphery of a mouth, and an anti-slip member made of elastic rubber mounted at an appropriate position in the longitudinal direction of the leaf spring member, wherein the leaf spring member itself An auxiliary leaf spring shorter than the longitudinal dimension is provided in a state of being superimposed on the side facing the drain port, and the mutual longitudinal intermediate portions of the leaf spring member and the auxiliary leaf spring are shared at appropriate locations on the cap main body side. The drain cap is fixed by tightening, and the anti-slip member is attached to a region of the leaf spring member that does not overlap with the auxiliary leaf spring. The anti-slip device connects a pressure contact portion forming a contact surface with the inner periphery of the drain port, a holding portion responsible for mounting the leaf spring member at an appropriate position in the longitudinal direction, and the holding portion and the pressure contact portion. 2. The drain cap according to claim 1, wherein displacement spaces are interposed between at least both sides of said pressure contact portion in the width direction and said holding portion for assisting elastic deformation of said pressure contact portion. . Only the central portion of the pressure contact portion is connected to the holding portion via a connecting portion, and a displacement space is interposed so as to surround the connecting portion, so that the pressure contact portion can swing and tilt in all directions. The drain cap according to claim 1 or 2. Claims 1 and 2, wherein the holding portion has a hole with a rhombic cross-section through which the leaf spring member passes, and the hole is formed so as to tightly hold the width end of the leaf spring member in a diagonal direction. Or the drain cap according to 3. The leaf spring member has a constricted portion at an appropriate position within a range not overlapping the auxiliary leaf spring, and the holding portion has a groove into which the constricted portion is fitted to form a lip groove-shaped cross section. 5. A drain cap according to claim 1, 2, 3 or 4, characterized in that it has a 6. The drain cap according to claim 1, 2, 3, 4, or 5, wherein the contact surface of the press-contact portion to the inner periphery of the drain port is formed with a protrusion that enhances the anti-slip effect.

Images