JP7213541B2 - Drain structure - Google Patents

Description

The present invention relates to drain structures.

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.

An example of a conventional drain structure using this type of drain cap is shown in FIG. A drain pipe 3 for draining rainwater accumulated on the surface is vertically buried in the drain pipe 3, and a drain body 5 forming a drain port 4 for drawing in rainwater is fitted to the upper end of the drain pipe 3. - 特許庁

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 drain cap 9 having a water-permeable structure. The drain cap 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. 8 shows how the drain cap 9 is attached to the drain port 4. When attaching the drain cap 9, an operator bends the two leaf spring members 11 so that the lower end of each leaf spring member 11 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 drain cap 9. As shown in FIG.

For example, Japanese Laid-Open Patent Publication No. 2002-300001 discloses a general technical level related to the drain structure of the present invention.

JP-A-2006-45881

However, in such a conventional drain cap 9, it is necessary to narrow the leaf spring members 11 projecting in all directions to be smaller than the diameter of the drain port 4 and to insert it into the drain port 4, which makes it difficult to install. In addition, there is a concern that the drain cap 9 may be pulled out of the drain port 4 and blown away by strong winds such as typhoons.

In order to prevent such a situation, it is conceivable to increase the resilience of the leaf spring member 11 to improve the retainability. At times, the leaf spring member 11 may open with force, increasing the risk of hitting a worker's hand.

Moreover, even if the elastic force of the leaf spring member 11 is strengthened, the fixing method that relies on the frictional force caused by the contact of the leaf spring member 11 with the inner side of the drain pipe directly below the drain port 4 is somewhat weak as a countermeasure against strong winds. Therefore, it is desired to prevent the drain cap 9 from coming off more reliably.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a drain structure which is easier to attach than conventional drain structures and free from fear of being blown away by strong winds.

The present invention provides a drain cap having a water-permeable structure covering a drain port, and a drain cap that protrudes downward from the inside of the drain cap, is narrowed and inserted into the drain port, and spreads by its own elastic force to directly under the drain port. a leaf spring member that presses against the inside of the drain pipe; and an anchor that is provided on the outer edge of the drain port so as to engage with the leaf spring member and prevent it from coming off from the drain port, wherein the leaf spring A drain structure, wherein the member has a longitudinally extending slit, and the anchor is formed in a downwardly hooked shape with a width within the width of the slit. is.

With this configuration, when the anchors of the drain are passed through the lower portions of the slits of the leaf spring members and engaged with each other, and then the drain cap is pushed down, the anchors slide relatively along the slits. As a result, the drain cap descends while maintaining the engagement state between the anchors and the slits, and the drain cap is seated over the drain port, while the lower ends of the leaf spring members are supported by themselves. and presses against the inside of the drain pipe directly below the drain port, thereby fixing the drain cap to the inside of the drain pipe directly below the drain port.

On the other hand, when the drain cap is pulled up, the drain cap rises while maintaining the engagement state between the anchors and the slits, and when the anchors of the drain port relatively reach the lower ends of the slits. , each anchor forming a downward hook is hooked to the lower end of each of the slits to prevent the drain cap from being pulled up further.

Therefore, even if the drain cap is pulled out from the drain port by a strong wind such as a typhoon, each anchor is attached to the lower end of each slit when the leaf spring member is pulled out corresponding to the slit length. Further extraction is prevented by hooking on the drain cap, and a situation in which the drain cap is blown off is reliably avoided.

As a result, there is no need to excessively strengthen the elastic force of the leaf spring member to prevent it from being blown away by strong winds, making it easier to install than before. Since the engagement state between each anchor and each slit is maintained even if the arm is pulled up, the leaf spring member does not open forcefully, and there is no danger that the leaf spring member will hit a worker's hand.

That is, if the leaf spring member does not open forcefully when the drain cap is pulled up, there is no problem even if the drain cap is casually pulled up, so that the work of removing the drain cap from the drain port becomes extremely easy.

Moreover, the drain cap pulled up is supported in a state of floating above the drain port by the leaf spring member pressing against the outer edge of the drain port at the position where each anchor is hooked to the lower end of each slit. Therefore, it is possible to clean the drain port very easily without completely removing the drain cap.

Further, according to the present invention, the upper ends of the two leaf spring members are respectively mounted at positions opposed to each other in the diametrical direction of the inner peripheral surface of the lower portion of the drain cap, and the respective leaf spring members are once moved toward each other. It is preferable to form a shape that is bent downward through a curved portion of a circular arc cross section after being directed, and that is gradually opened so as to separate downward.

In this way, the anchors and the slits are engaged with each other at diametrically opposite positions on the inner peripheral surface of the lower portion of the drain cap, so that the drain cap that has been pulled up to the upper limit can be laid down. Therefore, it is possible to clean the drain port more simply by shifting the drain cap from directly above the drain port without completely removing the drain cap.

Moreover, since the upper end portions of the two leaf spring members are attached to the positions facing each other in the diametrical direction of the lower inner peripheral surface of the drain cap, the conventional two leaf spring members cross each other. Compared to a structure in which they are fixed in an overlapping state, the ratio of clogging the opening area of the drain port is greatly reduced, making clogging difficult.

In addition, since the two leaf spring members are once directed toward each other and then bent downward through the bent portion of the circular arc cross section, and gradually opened downward as they go downward, the above-mentioned bent plate spring members are bent downward. It is possible to bend the part without applying excessive stress and effectively exert elastic force.

Further, in the present invention, one sheet of leaf spring member is attached to the central lower surface of the top portion of the drain cap in the longitudinal direction, and two portions of the leaf spring member sandwiching the central portion are bent into arc-shaped cross-sections. It is also possible to form a shape that is bent downward through the ridge and is gradually separated as it goes downward.

Even in this case, it is possible to lay down the drain cap that has been pulled up to the upper limit and clean the drain port more easily, and the ratio of blocking the opening area of the drain port compared to the conventional method can be greatly reduced. It is possible to make it difficult to clog by reducing the amount.

It should be noted that two portions sandwiching the central portion in the longitudinal direction of one sheet of leaf spring member are bent downward through the bent portion of the circular arc cross section, and are formed in a shape that gradually opens away from the bent portion as it goes downward. It is possible to bend the part without applying excessive stress and effectively exert elastic force.

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

(I) According to the invention of claim 1 of the present invention, it is possible to realize a drain structure that is easier to install than the conventional one and that is free from the risk of being blown away by strong winds, and a drain cap that is pulled upward. can be supported so as to float above the drain port, so cleaning of the drain port, etc., can be performed very simply without completely removing the drain cap.

(II) According to the inventions of claims 2 and 3 of the present invention, since the drain cap pulled up to the upper limit can be laid down as it is, it is possible to shift the drain cap from directly above the drain port without completely removing the drain cap. As compared with the conventional structure in which two leaf spring members are overlapped in a crisscross pattern and fixed, the opening of the drain port can be more easily cleaned. It is possible to keep the area wide, and it is possible to prevent clogging of the drain port. It is possible to obtain a leaf spring member that is hard to break and easy to bend.

1 is a cross-sectional view showing one embodiment of a drain structure of the present invention; FIG. FIG. 2 is a perspective view of the drain cap of FIG. 1 as seen obliquely from above; FIG. 2 is a perspective view showing a state in which an anchor is engaged with the slit of FIG. 1; FIG. 4 is a perspective view showing a state in which the drain cap of FIG. 3 is placed over the drain port; FIG. 4 is a perspective view showing a state in which the drain cap of FIG. 3 is laid down; FIG. 4 is a cross-sectional view showing another embodiment of the drain structure of the present invention; FIG. 11 is a cross-sectional view showing a conventional example; FIG. 8 is a perspective view showing how the drain cap of FIG. 7 is attached to the drain port;

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

1 to 5 show an embodiment of the drain structure of the present invention. In this embodiment as well, a concrete frame 2 constituting the roof of a building, a balcony, etc. is used to drain rainwater accumulated on the surface thereof. A drain pipe 3 is embedded in the vertical direction, and a drain body 5 forming a drain port 4 for drawing in rainwater is fitted to the upper end of the drain pipe 3, and a flange 7 at the upper end of the drain body 5 and a hollow disc shape A drain cap 12 having a water-permeable structure that covers the drain port 4, and a drain cap 12 that extends downward from the inside of the drain cap 12 and extends inside the drain port 4 A plate spring member 13 which is narrowed and inserted and spread by its own elastic force to press against the inner side of the drain pipe 3 directly below the drain port 4, and is hooked to the plate spring member 13 to be pulled out from the drain port 4. An anchor 14 provided at the outer edge of the drain port 4 to prevent detachment is improved as a new component.

7 and 8, the drain cap 12 is dome-shaped and has a plurality of openings 15 for allowing rainwater to pass through. The ribs 16 are provided at diametrically opposite positions of the ribs 16, and the upper ends of the two leaf spring members 13 are fixed to the lower surface of the ribs 16 with screws 17. These leaf spring members 13 are attached to each other. The plate spring members 13 are formed in such a shape that the leaf spring members 13 are once directed to approach each other, then bent downward through the bent portion 13a having an arcuate cross section, and are gradually opened as they go downward (see FIG. 2). is formed with a slit 18 extending in its longitudinal direction, and the anchor 14 is formed to have a width within the width of the slit 18 and to form a downwardly hooked shape.

In the example shown here, an anchor 14 is formed on the hollow disc-shaped waterproof layer retainer 8, and the waterproof layer retainer 8 is sandwiched between the waterproof sheet 6 and the flange of the upper end of the drain body 5. 7, each anchor 14 is arranged on the outer edge of the drain port 4. As shown in FIG.

When the drain structure 19 is constructed in this way, as shown in FIG. When the cap 12 is pushed down, the anchors 14 slide relatively along the slits 18, so that the drain cap 12 descends while maintaining the engagement state between the anchors 14 and the slits 18, As shown in FIG. 4 , while the drain cap 12 is seated over the drain port 4 , the lower ends of the leaf spring members 13 expand due to their own elastic force and extend inside the drain pipe 3 immediately below the drain port 4 . The drain cap 12 is thus fixed inside the drain pipe 3 just below the drain port 4 .

On the other hand, when the drain cap 12 is pulled up, the drain cap 12 rises while maintaining the engagement state between the anchors 14 and the slits 18, and the anchors 14 of the drain port 4 are relatively aligned with the slits 18. When the lower end is reached, the downwardly hooked anchors 14 are engaged with the lower ends of the slits 18 to prevent the drain cap 12 from being pulled up further (see FIG. 3).

Therefore, even if the drain cap 12 is pulled out from the drain port 4 by a strong wind such as a typhoon, each anchor 14 can be pulled out when the length of the slit 18 of each leaf spring member 13 is pulled out. The lower ends of the respective slits 18 are hooked to prevent further extraction, thereby reliably avoiding a situation in which the drain cap 12 is blown off.

As a result, there is no need to excessively strengthen the elastic force of the leaf spring member 13 so that it will not be blown away by a strong wind, and the installation is better than before. Even if the drain cap 12 is pulled up, the engaging state between each anchor 14 and each slit 18 is maintained, so that the leaf spring member 13 does not open vigorously, and there is a risk that the leaf spring member 13 hits a worker's hand. will be gone.

That is, if the leaf spring member 13 does not open forcefully when the drain cap 12 is pulled up, there is no problem even if the drain cap 12 is carelessly pulled up. become.

Moreover, the drain cap 12 lifted up is lifted up from the drain port 4 by pressing the plate spring member 13 against the outer edge of the drain port 4 at the position where each anchor 14 is hooked to the lower end of each slit 18. Since the drain cap 12 is supported in this state, cleaning of the drain port 4 can be performed very easily without completely removing the drain cap 12 (see FIG. 3).

Here, particularly in the case of this embodiment, not only can the drain cap 12 be supported in a state of floating above the drain port 4, but as shown in FIG. Therefore, it is possible to clean the drain port 4 more simply by shifting it from directly above the drain port 4 without removing the drain cap 12 completely.

Further, since the structure is such that the upper ends of two leaf spring members 13 are mounted at positions facing each other in the diametrical direction of the inner peripheral surface of the lower portion of the drain cap 12, the conventional two leaf spring members 11 (see FIG. 7 and FIG. 8) are fixed in a criss-crossed state, the ratio of clogging the opening area of the drain port 4 is greatly reduced, and clogging becomes difficult.

In addition, since the two leaf spring members 13 are once directed toward each other and then bent downward through the bent portion 13a having an arcuate cross section, the leaf spring members 13 are formed in such a shape that they are gradually separated from each other as they go downward. It is possible to bend the bent portion 13a without applying an excessive stress and to effectively exert an elastic force.

Therefore, according to the above-described embodiment, it is possible to realize the drain structure 19 which is easier to attach than the conventional one and free from the fear of being blown away by a strong wind. Since the drain cap 12 can be supported in the upright position, cleaning of the drain port 4 can be performed very simply without completely removing the drain cap 12. Since the cap 12 can be laid sideways as it is, the drain cap 12 can be moved from directly above the drain port 4 without being completely removed, and the cleaning of the drain port 4 can be performed more easily.

Moreover, compared to the conventional structure in which two leaf spring members 11 (see FIGS. 7 and 8) are superimposed and fixed in a criss-cross manner, the opening area of the drain port 4 can be kept wide. , the drain port 4 can be made difficult to clog, and furthermore, the bent portion 13a can be bent without applying excessive stress, and elastic force can be effectively applied, so that breakage etc. Therefore, the leaf spring member 13 can be easily installed.

FIG. 6 shows another embodiment of the present invention. In this embodiment, instead of the two leaf spring members 13 in the embodiment of FIGS. , and the leaf spring member 13 is bent downward at two points sandwiching the central portion through a bent portion 13a having an arcuate cross-section, and is gradually bent downward. It has a shape that is open so that it is spaced apart.

Even in this case, the drain cap 12 pulled up to the upper limit can be turned sideways as it is to clean the drain port 4 more easily, and the ratio of blocking the opening area of the drain port 4 can be reduced compared to the conventional case. The leaf spring member 13 can be made to be less likely to be clogged by greatly reducing it, and moreover, to be easily bent while being less likely to be broken.

In addition, the above description is for the case where the waterproof layer retainer with the anchors 14 is adopted from the beginning at the time of new construction. It is also possible to adopt the waterproof layer retainer and the drain cap 12 equipped with the leaf spring member 13 with the slit 18, and apply the drain structure of the present invention by replacing the old waterproof layer retainer and the drain cap 12. .

It should be noted that the drain structure of the present invention is not limited to the above-described embodiments, and the number, shape, and mounting method of leaf spring members are not necessarily limited to those shown in the drawings. It goes without saying that various modifications can be made without departing from the scope.

3 drain pipe 4 drain port 12 drain cap 13 leaf spring member 13a bent portion 14 anchor 18 slit 19 drain structure

Claims (3)

a drain cap having a water-permeable structure covering a drain port, and a drain cap projecting downward from the inside of the drain cap, being narrowed and inserted into the drain port, and expanded by its own elastic force to the inside of the drain pipe immediately below the drain port. and an anchor provided on the outer edge of the drain port so as to engage with the leaf spring member and prevent it from coming off from the drain port, wherein the leaf spring member extends in the longitudinal direction and wherein said anchor is formed in a downwardly hooked shape with a width within the width of said slit. The upper end portions of two leaf spring members are respectively attached to positions facing each other in the diametrical direction of the inner peripheral surface of the lower portion of the drain cap. 2. The drain structure according to claim 1, characterized in that the drain structure is bent downward through the groove and opened so as to gradually separate downward. A sheet of leaf spring member is attached to the central lower surface of the top of the drain cap in the longitudinal direction, and two portions of the leaf spring member sandwiching the central portion are bent downward through the bent portions of the circular arc cross section and bent downward. 2. A drain structure according to claim 1, characterized in that it has a shape that opens so as to gradually separate as it goes.

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