JP7249636B2 - drain cap - Google Patents

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 danger of exposed drain ports, and maintaining aesthetics.

As shown in FIG. 6, in the case of the conventional drain cap 1, a drain pipe 3 for draining rainwater accumulated on the surface is vertically buried in a concrete frame 2 that constitutes the roof of a building, a balcony, or the like. A drain body 5 forming a drain port 4 for drawing in rain water is fitted to the upper end of the drain pipe 3 .

Here, the surface of the concrete frame 2 is covered with a waterproof sheet 6. The waterproof sheet 6 consists of a flange 7 at the upper end of the drain body 5 and a hollow disk-shaped waterproof layer retainer 8. The waterproof layer retainer 8 is screwed to the flange 7 at the upper end of the drain body 5 .

The drain port 4 is covered with a cap body 9 having a water-permeable structure. The cap body 9 has a dome shape as shown in the figure and has a plurality of openings 10 for letting rainwater pass through. , and two leaf spring members 11 are fixed to the shaft portion 9a with screws. The length of the leaf spring member 11 is sufficiently longer than the diameter of the drain port 4, and the two leaf spring members 11 are fixed in a superimposed state so as to cross each other.

FIG. 7 shows how the cap body 9 is attached to the drain port 4. When attaching the cap body 9, an operator bends the two leaf spring members 11 so that the lower ends of the leaf spring members 11 are bent. The leaf spring member 11 is inserted into the drain port 4 with the part narrower than the diameter of the drain port 4, and when the worker's hand is released from the leaf spring member 11 after the insertion, the plate The lower end of the spring member 11 expands due to its own elastic force and presses against the inside of the drain pipe 3 directly below the drain port 4, thereby fixing the cap body 9. As shown in FIG.

However, in the conventional drain cap 1, the two leaf spring members 11 crossed in a cross shape are narrowed smaller than the diameter of the drain port 4 and inserted into the drain port 4. A large portion of the opening area of the drain port 4 is blocked by the cross-shaped intersections of the leaf spring members 11, and the drain port 4 is clogged by falling leaves and the like that accompany the rainwater. The problem was that it was easy.

Therefore, the following patent document 1 has been proposed by the same applicant as the present invention. In this patent document 1, as shown in FIG. Equipped with spring members 11', the drain cap 1' is configured such that the leaf spring members 11' do not narrow the opening area of the drain port 4 (see FIG. 6) as much as possible. In addition, in the drain cap 1' shown in FIG. 8, for the sake of convenience of explanation, the same reference numerals are assigned to the structural elements that are functionally the same as those shown in FIGS.

JP 2015-55140 A

However, in the case of the drain cap 1' in which leaf spring members 11' are individually installed at a plurality of places on the inner circumference of the lower portion of the cap body 9, it is said that the opening area of the drain port 4 (see FIG. 6) does not have to be narrowed as much as possible. While the advantage is obtained, since it was necessary to correspond to the drain port 4 of various diameters only by the deflection amount of each leaf spring member 11', it was possible to correspond only to the diameter of the drain port 4 in a relatively narrow range. Moreover, within the range that can be accommodated, the larger the diameter, the less the amount of deflection and the weaker the pressure contact force.

The present invention has been made in view of the above-mentioned actual situation, and it is possible to correspond to a wider range of drain port diameters than before, and to exhibit good fixing performance regardless of the drain port diameter. The purpose is to provide an excellent 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 downward from a plurality of locations on the inner periphery of the lower part of the cap body, is narrowed and inserted into the drain port, and spreads by its own elastic force. and a leaf spring member that presses against the inside of the drain pipe immediately below the drain port, the drain cap being guided so that the upper end of each of the leaf spring members can move in a direction approaching the axial center of the cap body. It is characterized by being mounted on the lower inner periphery of the cap body via a mechanism and biased by an elastic body in a direction away from the axis of the cap body.

By doing so, by moving the upper end of each leaf spring member in a direction approaching the axial center of the cap main body, the arrangement position of the upper end of each leaf spring member can be adjusted to the diameter of the drain port. For example, if the diameter of the drain port is relatively large, the upper end of each of the plate spring members is pulled away from the axis of the cap body to be used, In such a state, the portion beyond the upper end of each leaf spring member is narrowed and inserted into the drain port, and each leaf spring member is expanded by its own elastic force to the inside of the drain pipe directly below the drain port. The cap main body may be fixed by pressing the cap body.

Further, if the diameter of the drain port is relatively small, the upper end of each of the leaf spring members is pulled toward the axial center of the cap body against the biasing force of the elastic body. In such a state, the portion beyond the upper end of each leaf spring member is narrowed and inserted into the drain port, and each leaf spring member is expanded by its own elastic force to the inside of the drain pipe directly below the drain port. The cap main body may be fixed by pressing the cap body.

As a result, it is possible to adapt to a wider range of drain port diameters than in the conventional case of adjusting the diameter of the drain port only by the amount of deflection of each leaf spring member, and moreover, the leaf spring members can be adapted to a wider range of drain port diameters. It is possible to similarly flex the portion ahead of the upper end portion of each movement position to ensure a proper pressure contact force.

In addition, by aligning the arrangement position of the upper end of each of the leaf spring members with the diameter of the drain port, it is possible to press the portion ahead of the upper end of each of the leaf spring members along the inner side of the drain pipe. Since the opening area of the drain port does not need to be narrowed by the plate spring members, there is almost no risk of falling leaves or the like accompanying the rainwater being caught, and clogging of the drain port is less likely to occur.

Further, in carrying out the present invention more specifically, the upper end of each leaf spring member forms a guide portion extending in a direction close to the axial center of the cap body, and the portion ahead of the guide portion extends downward. Accordingly, it is preferable that the pressure contact portion is formed to open in a direction away from the axial center of the cap body.

Further, when each leaf spring member is configured to form a guide portion and a pressure contact portion as described above, a plurality of guide mechanisms project radially inward from the inner periphery of the lower portion of the cap body. It is preferable that the guide portion of each leaf spring member is slidably inserted, and a coil spring is housed in each guide mechanism as an elastic body for urging the guide portion.

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

(I) By moving the upper end of each leaf spring member toward the axial center of the cap body, the arrangement position of the upper end of each leaf spring member can be adjusted according to the diameter of the drain port. Therefore, compared to the conventional case where the diameter of the drain port is matched only by the amount of deflection of each leaf spring member, it is possible to adapt to a wider range of drain port diameters, and moreover, the upper end of each leaf spring member can be used. The portion ahead of the portion can be bent in the same manner at each moving position to secure just the right pressure contact force, and good fixing performance can be exhibited regardless of the diameter of the drain port.

(II) By aligning the arrangement position of the upper end of each leaf spring member with the diameter of the drain port, the portion ahead of the upper end of each leaf spring member can be brought into pressure contact along the inside of the drain pipe. It is possible to effectively prevent clogging of the drain port by hardly narrowing the opening area of the drain port by the leaf spring members.

1 is a cross-sectional view showing an embodiment of a drain cap of the present invention; FIG. FIG. 2 is a cross-sectional view showing a state in which the drain cap of FIG. 1 is extracted from a drain port; 3 is an arrow view in the direction of III-III in FIG. 2; FIG. 4 is a perspective view showing details of the guide mechanism of FIG. 3; FIG. FIG. 5 is a perspective view showing a state in which the guide portions of the leaf spring members of FIG. 4 are pulled out; FIG. 11 is a cross-sectional view showing a conventional example; FIG. 7 is a perspective view showing how the drain cap of FIG. 6 is attached to the drain port; FIG. 11 is a perspective view showing another 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 5 show an embodiment of the drain cap of the present invention. As shown in FIG. 1, the drain cap of the present invention is shown in a state of use. A waterproof sheet 6 is coated on the surface of the waterproof sheet 6, and a drain pipe 3 having a drain port 4 opened at the upper end for discharging rainwater accumulated on the waterproof sheet 6 is buried in the vertical direction of the concrete frame 2. a cap body 12 having a water-permeable structure covering the drain port 4; and a cap body 12 projecting downward from a plurality of locations on the inner circumference of the lower portion of the cap body 12, and spreads by its own elastic force after being narrowed and inserted into the drain port 4. A drain cap 14 is provided with a plate spring member 13 that presses against the inner side of the drain pipe 3 immediately below the drain port 4. It is mounted on the inner periphery of the lower part of the cap body 12 via a guide mechanism 15 so that it can move in the approaching direction, and is attached by a coil spring 16 (elastic body) in a direction away from the axis O of the cap body 12. It is characterized by the fact that it is being pushed.

Here, as shown in FIG. 2 in which the drain cap 14 is extracted from the drain port 4 and is not in use, the cap body 12 has a dome shape with a plurality of openings 17 for passing rainwater. Each leaf spring member 13 forms a guide portion 13a extending in a direction in which the upper end portion thereof approaches the axial center O of the cap body 12, and the portion ahead of the guide portion 13a extends downwardly. A press-contact portion 13b that opens in a direction away from the axial center O of the cap body 12 is formed.

Further, as shown in FIG. 3 in the direction of arrows III-III in FIG. The guide portion 13a of each leaf spring member 13 is slidably inserted, and each guide mechanism 15 accommodates a coil spring 16 that biases the guide portion 13a.

More specifically, as shown in FIG. 4, each guide mechanism 15 has a structure consisting of two vertically divided pieces 15a and 15b. The guide portion 13a of each plate spring member 13 and the coil spring 16 are sandwiched between and accommodated therein, and the lower piece 15b is passed through the boss portion 18 (see FIGS. 1 and 2) of the upper piece 15a, and the screw 19 is inserted. are screwed from below for mutual assembly.

At this time, a guide groove 20 is formed on the tip side of each of the guide mechanisms 15 so that both sides of the guide portion 13a of each leaf spring member 13 are slidably fitted. Both sides are smoothly guided so that when the guide portion 13a is pulled out while the coil spring 16 is stretched as shown in FIG. It's becoming

The coil spring 16 is a tension type coil spring 16 that pulls the guide portion 13a of each leaf spring member 13 in a direction away from the axial center O of the cap main body 12. is engaged with the engaging hole 13c of the guide portion 13a, and the proximal end of the coil spring 16 is engaged with the boss portion 18. As shown in FIG.

Thus, by moving the guide portion 13a of each leaf spring member 13 in a direction approaching the axial center O of the cap body 12, the guide portion 13a of each leaf spring member 13 can be arranged. The position can be adjusted according to the diameter of the drain port 4. For example, if the diameter of the drain port 4 is relatively large, the guide portions 13a of the plate spring members 13 are aligned with the axial center O of the cap body 12. In such a state, the pressure contact portion 13b of each leaf spring member 13 is narrowed and inserted into the drain port 4, and each leaf spring member 13 is pushed to its own elasticity. The cap main body 12 is fixed by being spread by force and brought into pressure contact with the inside of the drain pipe 3 immediately below the drain port 4 .

Further, if the diameter of the drain port 4 is relatively small, the guide portion 13a of each leaf spring member 13 is pulled toward the axial center O of the cap body 12 against the biasing force of the coil spring 16. In such a state, the press-contact portion 13b of each leaf spring member 13 is narrowed and inserted into the drain port 4, and each leaf spring member 13 is widened by its own elastic force to the drain port. The cap main body 12 is fixed by being pressed against the inner side of the drain pipe 3 directly below 4 .

As a result, compared to the conventional case where the diameter of the drain port 4 is adjusted only by the amount of deflection of each plate spring member 11 (see FIGS. 6 and 7), the diameter of the drain port 4 can be handled in a wider range. In addition, it is possible to flex the press-contact portions 13b of the leaf spring members 13 in the same manner at each movement position, thereby ensuring a sufficient press-contact force.

Further, as shown in FIG. 1, the position of the curved portion between the guide portion 13a and the press-contact portion 13b of each leaf spring member 13 is aligned with the diameter of the drain port 4, so that the press-contact portion 13b is connected to the drain pipe 3. Since the opening area of the drain port 4 does not need to be narrowed by the plate springs 13, there is almost no risk that fallen leaves, etc., accompanied by rain water will get caught, and the water can be drained. Clogging of the mouth 4 becomes difficult to occur.

Therefore, according to the above embodiment, by moving the guide portion 13a of each leaf spring member 13 in the direction toward the axial center O of the cap main body 12, the arrangement position of the guide portion 13a of each leaf spring member 13 can be changed. Since it can be adjusted according to the diameter of the drain port 4, the diameter of the drain port 4 can be adjusted in a wider range compared to the conventional case where the diameter of the drain port 4 is adjusted only by the amount of deflection of each plate spring member 13. In addition, the pressure contact portion 13b of each leaf spring member 13 can be bent in the same manner at each movement position to ensure a proper pressure contact force, regardless of the diameter of the drain port 4. Good fixing performance can be exhibited.

Furthermore, by aligning the bent portion between the guide portion 13a and the pressure contact portion 13b of each leaf spring member 13 with the diameter of the drain port 4, the pressure contact portion 13b of each leaf spring member 13 is aligned along the inside of the drain pipe 3. Since the pressure contact is possible, the opening area of the drain port 4 is hardly narrowed by the plate spring members 13, and clogging of the drain port 4 can be effectively prevented.

It should be noted that the drain cap of the present invention is not limited to the above-described embodiment, and instead of using a tension-type coil spring as an elastic body, a compression-type coil spring may be used in the opposite direction. Furthermore, it is also possible to use various types of resilient bodies such as torsion springs and spiral springs to urge the upper end of each leaf spring member in a direction away from the axial center of the cap body. It goes without saying that it is possible and that various modifications can be made without departing from the gist of the present invention.

3 drain pipe 4 drain port 12 cap main body 13 plate spring member 13a guide portion 13b pressure contact portion 14 drain cap 15 guide mechanism 16 coil spring (elastic body)
O axis

Claims (3)

a cap body having a water-permeable structure covering a drain port; and a cap body projecting downward from a plurality of locations on the lower inner periphery of the cap body, inserted narrowly into the drain port, and expanded by its own elastic force to expand the drain port. and a leaf spring member that presses against the inner side of the drain pipe directly below the drain cap, wherein the upper end of each leaf spring member is moved in a direction approaching the axial center of the cap body via a guide mechanism. A drain cap, characterized in that it is mounted on the inner periphery of the lower portion of the cap body and is urged by an elastic body in a direction away from the axis of the cap body. The upper end portion of each leaf spring member forms a guide portion extending in a direction close to the axis of the cap body, and the portion ahead of the guide portion opens downward in a direction away from the axis of the cap body. 2. The drain cap according to claim 1, wherein the drain cap forms a part. Guide mechanisms protrude radially inward from a plurality of locations on the inner circumference of the lower portion of the cap body. 3. The drain cap according to claim 2, wherein a coil spring is accommodated as an elastic body for urging said guide portion.

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