JP4317306B2 - Dust-proof housing fixing device for roof drain - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dustproof housing fixing apparatus used for fixing a dustproof housing covering a strainer of a roof drain.
[Prior art]
As shown in FIGS. 10 and 11, the roof drain a surrounds a tray part b embedded in a floor surface f such as a rooftop or a balcony and a drain hole c opened at the center of the tray part b. A drain main body e is constituted by the drain pipe portion d extending downward, and a strainer g having a plurality of narrow water passage gaps v is deposited on the drain main body e. A soot pipe h is connected to the drain pipe part d. The rainwater flowing from the surrounding floor surface f through the narrow water passage gap v of the strainer g into the tray portion b can be drained from the drainage hole c into the vertical pipe h.
[0003]
By the way, when the roof drain a having such a configuration is used in a place where there is a large amount of dust such as dust or fallen leaves, a relatively large amount of dust flowing along with rainwater can be removed by the strainer g. There is a problem that small dust that can pass through the narrow water passage gap v flows into the pipe h together with rainwater and stays inside, thereby impairing the drainage action. Therefore, in recent years, as shown in FIG. 10 and FIG. 11, small dust can flow in by covering the strainer g with a dust-proof housing k in which a fine wire mesh j is stretched around an outer frame i made of wire rods. Some roof drains a have been devised to prevent this.
[0004]
[Problems to be solved by the invention]
The dust-proof housing k is fixed to the drain body e through fixing means so as not to be displaced due to external pressure such as flowing water pressure, but the conventional fixing means fixes the strainer g as shown in FIG. For this purpose, the dust-proof housing k is fixed to the drain body e together with the strainer g using the existing screw m for the purpose, or an L-shaped screw rod p having an engaging portion n at the lower end as shown in FIG. Is inserted into the narrow water passage gap v of the strainer g, and the nut q is screwed on the upper side with the engaging portion n engaged with the back surface of the strainer g and attached to the strainer g. The dust-proof housing k is fixed by inserting the screw rod p into the dust-proof housing k from below and screwing the nut r onto the protruding end side.
[0005]
However, in such a conventional fixing means that uses the screw m for fixing the former strainer g, the lower edge of the outer frame i is inward at the portion fixed by the screw m. Since it is necessary to form a mounting portion t of a required shape by extending it and to form an opening u through which the driver is inserted above the mounting portion t, the structure of the dustproof housing k becomes complicated and the manufacturing cost is increased. There was a problem that became high. In the case of using the latter L-shaped screw rod p, when the screw rod p is attached to the strainer g with the nut q, the screw rod p is easily dropped, and the nut q is screwed with the screw rod p held. Therefore, the mounting work is troublesome, and furthermore, since it is necessary to screw the two nuts q and r to the screw rod p, respectively, it takes time and labor, and the work efficiency is poor. was there.
[0006]
An object of the present invention is to provide a fixing device for a dustproof housing in a roof drain, which can solve the conventional problems.
[0007]
[Means for Solving the Problems]
The present invention provides a drain having a drain body having a drainage hole and a strainer having a narrow water passage gap attached thereto, and the strainer is covered with a water-proof dustproof housing.
A locking head abutting against the surface of the strainer having a width wider than the narrow water passage ,
A connecting rod made of a screw rod that is projected upward from the locking head and connected to the dustproof rod, is inserted into the dustproof rod from below, and a nut is screwed to the protruding end side thereof ;
A pair of left and right support legs extending from the lower part of the locking head, extending from the lower part of the locking head, and inserted through the narrow water passage gap of the strainer from above. An elastic engagement portion formed by a pair of left and right elastic claw pieces that are connected to the lower end of the leg and expand toward the upper side, and the upper end of the leg engages with the back surface of the strainer. A dust-proof housing fixing device in a roof drain characterized by comprising:
[0008]
In such a configuration, the elastic engagement portion extending from the lower portion of the locking head is inserted from above into the narrow water passage gap of the strainer with its lateral width narrowed through elastic deformation. In this way, by narrowing the lateral width and inserting it into the narrow water passage, the elastic engagement portion is expanded by its elasticity and engaged with the back surface of the strainer. Accordingly, the fixing device can be easily attached to the strainer with one touch, and the dustproof housing can be fixed by the connecting rod projecting upward from the locking head. Further, since the locking head abuts against the surface of the strainer, the fixing device does not fall into the strainer from the narrow water passage.
[0009]
Further, in the above configuration, a configuration in which the connecting rod is a screw rod that is inserted into the dust-proof rod body from below and the nut is screwed to the protruding end side can be proposed as a preferred embodiment. In this way, the connecting rod is used as a screw rod, and the screw rod is inserted into the dustproof rod body from below, and the nut is screwed onto the protruding end side and tightened, whereby the dustproof rod body can be easily fixed. . Thereby, since it is not necessary to provide an attachment part, an opening part, etc. like the conventional in a dustproof housing, the structure of a dustproof housing does not become complicated, and manufacturing cost does not become high.
[0010]
Furthermore, in the above configuration, the elastic engagement portion is connected to the support leg extending from the lower portion of the locking head and the lower end of the support leg, and is expanded toward the upper side, and the upper end thereof Can be proposed as a preferred embodiment that is constituted by a pair of left and right elastic claws that engage with the back surface of the strainer. Here, the support leg and the elastic claw piece can be formed integrally with a metal leaf spring or elastic synthetic resin, or can be formed by fixing an elastic claw piece made of a leaf spring to the support leg. . In this way, a pair of left and right elastic claw pieces that expand toward the upper side are continuously provided at the lower end of the support leg, so that the elastic claw pieces are narrowed when the strainer is inserted into the narrow water passage. The elastic claw pieces are automatically narrowed by being pressed by the left and right side wall surfaces of the width-shaped water passage gap. Engaged. As a result, the fixing device can be easily attached to the strainer simply by pushing the elastic engagement portion into the narrow water passage from above.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Below, the 1st Example of this invention is described about FIGS. 1-4.
[0012]
In FIG. 1, reference numeral 1 denotes a roof drain to which the present invention is applied. A drain main body 2 of the roof drain 1 extends downward so as to surround a saucer portion 3 embedded in a floor surface f such as a rooftop or a balcony, and a drain hole 4 opened in the center of the saucer portion 3. The drainage pipe part 5 is made up of. On the upper surface of the saucer portion 3, a waterproof layer presser plate 6 sandwiching the edge of a sheet waterproof layer (not shown) laid on the floor surface f, a screw rod 7a standing on the saucer portion 3, A strainer 8 provided with a plurality of narrow water passages 9 is disposed on the waterproof layer presser 6 and fixed by a nut 7b screwed to the screw rod 7a. The strainer 8 is attached to the drain body 2 via the waterproof layer presser 6 by fixing the lower flange 10 to the waterproof layer presser 6 with screws 11. Note that the illustrated roof drain 1 is configured for sheet waterproofing and asphalt waterproofing, and includes a waterproof layer presser 6. The layer presser 6 is removed. In this case, the strainer 8 is directly fixed to the tray 3 with the screw 11.
[0013]
A female screw 12 is engraved on the lower inner peripheral surface of the drain pipe portion 5, and the male screw 14 formed at the upper end of the vertical tube 13 is screwed into the female screw 12, thereby 13 is connected to the drain pipe section 5. As a result, rainwater flowing from the surrounding floor surface f into the tray portion 3 through the narrow water passage gap 9 of the strainer 8 can be drained by flowing from the drain hole 4 into the vertical pipe 13. .
[0014]
Further, a water-permeable dustproof casing 15 that covers the strainer 8 is disposed on the drain body 2. The dustproof casing 15 is composed of an outer frame 16 made of a wire rod having a frustoconical outer shape, and a metal mesh 17 having a mesh size of about 5 mesh that is stretched over the entire outer surface of the outer frame 16. The dustproof casing 15 is fixed on the drain main body 2 by the fixing device 18 according to the present invention.
[0015]
As shown in FIGS. 3 and 4, the fixing device 18 includes a locking head 19 that comes into contact with the surface of the strainer 8, and is projected upward from the locking head 19 and connected to the dust-proof housing 15. The connecting rod 20 is extended from the lower portion of the locking head 19 and inserted into the narrow water passage 9 of the strainer 8 from above, and is expanded in the inserted state and engaged with the back surface of the strainer 8. And an elastic engagement portion 21 that performs.
[0016]
In the first embodiment, the locking head 19 and the elastic engagement portion 21 are integrally formed by bending a metal leaf spring. That is, the locking head portion 19 is formed so that the central portion of the belt-shaped leaf spring is bent into a rectangular cross section so that the lateral width is wider than the narrow water passage gap 9 of the strainer 8. The joint portion 21 includes a pair of left and right support legs 22 and 22 each extending a surplus portion of the leaf spring that forms the locking head 19, and the lower ends of the support legs 22 and 22 are folded outward. , And a pair of left and right elastic claw pieces 23, 23 that are expanded toward the top. Thereby, the elasticity which can be retracted is given to the elastic engaging part 21 so that the lateral width may be narrowed. In addition, a gap s that is substantially the same as or slightly wider than the thickness of the strainer 8 is provided between the upper ends of the elastic claw pieces 23 and 23 and the lower surfaces 19a and 19a of the locking head 19. The upper ends of the elastic claw pieces 23 and 23 can be engaged with the back surface of the strainer 8 in a state where the engaging portion 21 is inserted into the narrow water passage 9 of the strainer 8 from above.
[0017]
The connecting rod 20 is a screw rod fixed to the upper surface of the locking head 19 by fixing means such as welding, and is screwed to the protruding end side of the connecting rod 20 while being inserted into the dust-proof rod 15 from below. The nut 24 is connected to the dust-proof housing 15. Here, a wing nut is used as the nut 24 so that the screwing operation can be easily performed with a bare hand.
[0018]
The locking head 19, the elastic engagement portion 21, and the connecting rod 20 constituting the fixing device 18 are made of stainless steel for rust prevention, and the nut 24 is also made of stainless steel. .
[0019]
In order to fix the dust-proof housing 15 on the drain body 2 by the fixing device 18 having such a configuration, first, the elastic engagement portion is inserted into the narrow water passage 9 of the strainer 8 that is attached to the drain body 2. 21 is inserted from above, and the elastic engagement portion 21 is engaged with the back surface of the strainer 8. Here, the support legs 22 and 22 and the elastic claw pieces 23 and 23 constituting the elastic engagement portion 21 can narrow the entire lateral width through elastic deformation, and the elastic engagement portion 21 is narrowed. The elastic claw pieces 23 and 23 are pressed by the left and right side wall surfaces of the narrow water passage gap 9 by being inserted into the wide water passage gap 9 from above, and the lateral width is automatically reduced. , 23 pass through the narrow water passage 9 and expand due to its elasticity, and the upper end thereof is engaged with the back surface of the strainer 8 as shown in FIG. Thereby, the fixing device 18 can be easily attached to the strainer 8 by a one-touch operation of pushing the elastic engagement portion 21 into the narrow water passage 9 from above. At the time of this mounting operation, since the lateral width of the locking head 19 is wider than the narrow water passage 9 of the strainer 8, the lower surfaces 19 a and 19 a of the locking head 19 abut against the surface of the strainer 8. The fixing device 18 does not fall into the strainer 8 from the narrow water passage 9.
[0020]
After the fixing device 18 is attached to the strainer 8 as described above, the strainer 8 is covered with the dustproof housing 15. As a result, the connecting rod 20 projecting upward from the locking head 19 is inserted from below into the mesh of the dust-proof housing 15, and the nut 24 is screwed onto the projecting end side and tightened. As shown in FIG. 1, the dustproof housing 15 can be easily fixed. Since the nut 24 can be screwed and tightened to the protruding end side of the connecting rod 20 inserted through the dust-proof housing 15 from below, the dust-proof housing 15 can be fixed. There is no need to provide an attachment portion, an opening, or the like, and the structure of the dustproof housing is not complicated, so that the manufacturing cost does not increase.
[0021]
Then, by fixing the dust-proof housing 15 on the drain main body 2 by the fixing device 18 as described above, the dust-proof housing 15 is prevented from being displaced, and the dust-proof housing 15 prevents small dust contained in rain water. Can be removed.
[0022]
5 and 6 show a second embodiment of the fixing device 18, which is a slightly modified configuration of the elastic engagement portion 21 in the first embodiment. A substantially U-shaped cut 25 is formed in each of the pair of left and right support legs 22 and 22 in which the surplus portion of the formed leaf spring is extended downward, and the portion surrounded by the cut 25 expands upward. Thus, the elastic claw pieces 23 and 23 are formed by pulling them outward. Except for this point, the configuration is the same as that of the first embodiment, and the same portions are denoted by the same reference numerals and redundant description is omitted. And even if it comprises the elastic engagement part 21 in this way, there exists an effect same as a 1st Example.
[0023]
FIGS. 7 and 8 show a third embodiment of the fixing device 18. In this embodiment, the locking head 19 having a rectangular cross section and a single support leg constituting the elastic engagement portion 21 are shown. 22 is integrally formed of a mold material. A pair of left and right elastic claw pieces 23, 23 made of a metal leaf spring are fixed to the lower end of the support leg 22 coupled to the lower portion of the locking head 19, and the elastic claw pieces 23, 23 are The upper end is expanded so that the upper end thereof can be engaged with the back surface of the strainer 8. Here, a metal or a synthetic resin can be used for the mold material. When a metal is used for the mold material, as shown in FIG. The connecting rod 20 is fixed to the upper surface of the locking head 19 by fixing means such as welding. Further, the elastic claw pieces 23 and 23 are fixed to the support leg 22 by fixing means such as welding, riveting, and bolting. On the other hand, when a synthetic resin is used for the mold material, as shown in FIG. 8, the connecting rod 20 is fixed with its base portion embedded in the locking head 19. The elastic claw pieces 23 and 23 are fixed to the support leg 22 by fixing means such as riveting and bolting.
[0024]
FIG. 9 shows a fourth embodiment of the fixing device 18. In this embodiment, the locking head 19 and the elastic engagement portion 21 are integrally formed of a synthetic resin having appropriate elasticity. That is, an elastic engagement portion 21 is extended downward from a lower portion of a locking head portion 19 formed in a rectangular cross section, and the elastic engagement portion 21 includes a pair of left and right support legs 22, 22, At the lower ends of the support legs 22, 22 are provided with hook-shaped claw pieces 23 ′, 23 ′ that expand upward. A split groove 26 having an appropriate width with an open lower portion is formed between the support legs 22 and 22 in the vertical direction. The split groove 26 allows the strainer 8 to be inserted into the narrow water passage 9. The elastic engagement portion 21 can be retracted so as to narrow its lateral width, and when the claw pieces 23 'and 23' pass through the narrow water passage gap 9, it is expanded by its elasticity and the claw piece 23 'is expanded. , 23 ′ can be engaged with the back surface of the strainer 8. The connecting rod 20 formed of a screw rod projecting upward from the locking head 19 is fixed by embedding the base portion in the locking head 19.
[0025]
Even in the fixing device 18 according to the fourth embodiment and the third embodiment, the same effects as the first embodiment can be obtained.
[0026]
In the first embodiment, the case where the frustoconical dustproof casing 15 covering the strainer 8 of the circular roof drain 1 is fixed by the fixing device 18 is described. It can also be used when fixing a dustproof housing for a corner roof drain having a triangular cross section.
[0027]
【The invention's effect】
As described above, the present invention includes the locking head 19 that contacts the surface of the strainer 8, the connecting rod 20 that protrudes upward from the locking head 19 and is connected to the dust-proof housing 15, and An elastic engagement portion 21 that extends from the lower portion of the stop head 19 and is inserted into the narrow water passage 9 of the strainer 8 from above, and expands in the inserted state and engages the back surface of the strainer 8. Since the fixing device 18 for the dustproof housing 15 is configured, the elastic engagement portion 21 is inserted into the narrow water passage 9 from above with the lateral width narrowed, and the elastic engagement portion 21 is expanded by its elasticity. By opening and engaging the back surface of the strainer 8, the fixing device 18 can be easily attached to the strainer 8 with one touch, and the dust-proof housing 15 is fixed by the connecting rod 20 protruding upward from the locking head 19. can do. Further, when the mounting head 19 is in contact with the surface of the strainer 8 during the mounting operation, the fixing device 18 does not fall into the eight strainers from the narrow water passage 9.
[0028]
Further, the connecting rod 20 is constituted by a screw rod inserted into the dust-proof rod body 15 from below, and the nut 24 is screwed onto the protruding end side thereof, so that the dust-proof rod body 15 can be easily simplified through the tightening action of the nut 24. Since there is no need to provide the conventional attachment part t, opening u and the like (see FIG. 10) in the dustproof casing 15, the structure of the dustproof casing 15 is not complicated and the manufacturing cost is high. Never become.
[0029]
Further, the elastic engagement portion 21 is connected to the support leg 22 extending from the lower part of the locking head 19 and the lower end of the support leg 22, and is expanded toward the upper side. By comprising the pair of left and right elastic claw pieces 23, 23 that engage with the back surface of the strainer 8, the elastic claw pieces 23, 23 have a narrow width when the strainer 8 is inserted into the narrow water passage 9. The elastic claw pieces 23 and 23 are pressed by the left and right side wall surfaces of the water passage gap 9 and are automatically narrowed. When the elastic claw pieces 23 and 23 pass through the narrow water passage gap 9, the elastic claw pieces 23 are expanded by the elasticity, and the upper ends thereof are strainers 8 is engaged with the back surface. Thereby, there is an excellent effect that the fixing device 18 can be easily attached to the strainer 8 simply by pushing the elastic engagement portion 21 into the narrow water passage 9 from above.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view showing a construction state of a fixing device according to a first embodiment.
FIG. 2 is a plan view of a construction state in which the right half of the dustproof housing is cut away.
FIG. 3 is a front view of the fixing device according to the first embodiment.
FIG. 4 is a side view of the above.
FIG. 5 is a longitudinal sectional view of a fixing device according to a second embodiment.
FIG. 6 is a side view of the above.
FIG. 7 is a front view of a fixing device according to a third embodiment.
FIG. 8 is a front view showing another configuration of the fixing device according to the third embodiment.
FIG. 9 is a front view of a fixing device according to a fourth embodiment.
FIG. 10 is a longitudinal side view showing a construction state of a conventional configuration.
FIG. 11 is a longitudinal side view showing a construction state of another conventional configuration.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Roof drain 2 Drain main body 4 Drain hole 8 Strainer 9 Narrow width water-flow gap 15 Dust-proof housing 18 Fixing device 19 Locking head 20 Connecting rod 21 Elastic engagement part 22 Support leg 23 Elastic claw piece 24 Nut

Claims (1)

In the roof drain formed by applying a strainer having a narrow water passage gap on the drain body having the drainage hole opened, and covering the strainer with a water-proof dustproof housing,
A locking head abutting against the surface of the strainer having a width wider than the narrow water passage ,
A connecting rod made of a screw rod that is projected upward from the locking head and connected to the dustproof rod, is inserted into the dustproof rod from below, and a nut is screwed to the protruding end side thereof ;
A pair of left and right support legs extending from the lower part of the locking head, extending from the lower part of the locking head, and inserted through the narrow water passage gap of the strainer from above. An elastic engagement portion formed by a pair of left and right elastic claw pieces that are connected to the lower end of the leg and expand toward the upper side, and the upper end of the leg engages with the back surface of the strainer. A device for fixing a dustproof housing in a roof drain characterized by comprising:

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