JP2001193233A - Fixing apparatus for dust-proof casing in roof drain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing apparatus for fixing a dust-proof casing for covering a strainer of a roof drain, which dispenses with provision of an installing section or the like in the dust-proof casing, to thereby simplify fixing works. SOLUTION: The fixing apparatus 18 for the dust-proof casing 15 is comprised of an engaging head portion 19, a connecting rod 20, and an elastic engaging portion 21. The engaging head portion 19 is abutted on a surface of the strainer 8. The connecting rod 20 is upward protruded from the engaging head portion 19 to be connected to the dust-proof casing 15. The elastic engaging portion 21 downward extends from a lower portion of the engaging head portion 19 to be inserted into a narrow water-flow gap 9 of the strainer 8 from above. The elastic engaging portion 21 assuming the inserted position is expanded to be engaged with a rear surface of the strainer 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for fixing a dustproof enclosure used to fix a dustproof enclosure covering a roof drain strainer.

[0002]

2. Description of the Related Art As shown in FIGS. 10 and 11, a roof drain a has a receiving portion b buried in a floor f such as a rooftop or a balcony, and a drain hole c formed in the center of the receiving portion b. And a drain pipe part d extending downward so as to surround the drain body e, and a strainer g having a plurality of narrow water gaps v on the drain body e.
Is attached, and a gutter pipe h is connected to the drain pipe part d. Then, rainwater flowing from the surrounding floor surface f into the tray portion b through the narrow water-passing gap v of the strainer g is allowed to flow from the drainage hole c into the gutter pipe h to be drained.

[0003] By the way, the roof drain a
When used in places with a lot of dust such as dust and litter, of the dust that flows with rainwater, relatively large ones can be temporarily removed by the strainer g, but the narrow water gap v of the strainer g is removed. Small dust that can pass through flows into the gutter pipe h together with rainwater,
There is a problem that water stays inside and impairs the drainage action.
Therefore, in recent years, as shown in FIGS. 10 and 11, a strainer g is covered with a dustproof housing k in which a fine wire net j is stretched on an outer frame i formed of a wire rod.
A roof drain a that prevents the inflow of small refuse has been devised in part.

[0004]

The dustproof housing k is fixed to the drain body e via fixing means so as not to be displaced by an external pressure such as flowing water pressure. The conventional fixing means is shown in FIG. As shown, the existing screw m for fixing the strainer g is used to fix the dustproof housing k to the drain body e together with the strainer g, or
As shown in FIG. 11, an L-shaped screw rod p having an engagement portion n at its lower end is inserted into the narrow water passage gap v of the strainer g, and the engagement portion n is engaged with the back surface of the strainer g. In the combined state, the nut q is screwed on the upper side and attached to the strainer g, the screw rod p is inserted through the dustproof housing k from below, and the nut r is screwed on the protruding end side.
The dustproof housing k is fixed.

However, in such a conventional fixing means, which uses a screw m for fixing the former strainer g, a lower edge of the outer frame i is attached to a portion fixed by the screw m. Since it is necessary to extend inward to form a mounting portion t of a required shape and to form an opening u through which a driver is inserted above the mounting portion t, the structure of the dustproof housing k becomes complicated. However, there is a problem that the manufacturing cost is increased. In the latter case using the 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 while holding the screw rod p. And the installation work is troublesome, and the two nuts q and r need to be screwed into the screw rods p, respectively, which is troublesome and time-consuming, and the work efficiency is poor. was there.

An object of the present invention is to provide a fixing device for a dustproof housing in a roof drain which can solve such a conventional problem.

[0007]

According to the present invention, a drainer having a drain hole is provided with a strainer provided with a narrow water passage gap, and the strainer is covered with a water-proof dustproof housing. A locking head abutting on the surface of the strainer, a connecting rod projecting upward from the locking head and connected to the dustproof housing, and extending from a lower portion of the locking head. And a resilient engaging portion which is inserted from above into the narrow width water gap of the strainer, expands in the inserted state, and engages with the back surface of the strainer. It is a fixing device for the housing.

In such a configuration, the elastic engaging portion extending from the lower portion of the locking head has a narrow width through elastic deformation, and is inserted into the narrow water gap of the strainer from above. The elastic engaging portion is expanded by its elasticity and engaged with the back surface of the strainer by narrowing the lateral width and inserting the elastic engaging portion into the narrow water gap. 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 comes into contact with the surface of the strainer, the fixing device does not fall into the strainer from the narrow water gap.

Further, in the above configuration, it is possible to propose a preferred embodiment in which the connecting rod is a screw rod which is inserted into the dustproof housing from below and a nut is screwed on a protruding end side. As described above, the connecting rod is a screw rod, the screw rod is inserted into the dustproof housing from below, and the nut is screwed to the protruding end side and tightened, whereby the dustproof housing can be easily fixed. . As a result, it is not necessary to provide an attachment portion, an opening, and the like in the dustproof housing as in the related art, so that the structure of the dustproof housing does not become complicated and the manufacturing cost does not increase.

Further, in the above structure, the elastic engaging portion is provided with a support leg extending from a lower portion of the locking head and a lower end of the support leg, and is expanded as it goes upward. A preferred embodiment can be proposed as a preferred embodiment in which the upper end 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 an elastic synthetic resin, or can be formed by fixing an elastic claw piece made of a leaf spring to the support leg. . The pair of left and right elastic claws, which expand toward the upper side, are continuously provided at the lower ends of the support legs, so that the elastic claws become narrower when the strainer is inserted into the narrow water gap. It is pressed by the left and right side wall surfaces of the width-like water gap and is automatically narrowed, and when the elastic claw piece passes through the narrow width water-gap, it expands due to its elasticity, and its upper end is on the back surface of the strainer. Engaged. Thus, the fixing device can be easily attached to the strainer simply by pushing the elastic engaging portion into the narrow water gap from above.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described.
1 to 4 will be described.

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 receiving portion 3 buried in a floor f such as a rooftop or a balcony, and a drain hole 4 opened in the center of the receiving portion 3. And a drain pipe section 5 formed. On the upper surface of the tray 3, a waterproof layer presser 6 for holding an edge of a sheet waterproof layer (not shown) laid on the floor f is provided with a screw rod 7a standing upright on the tray 3.
And a nut 7b screwed to the threaded rod 7a. A strainer 8 having a plurality of narrow water gaps 9 is provided on the waterproof layer presser 6. The strainer 8 is attached to the drain body 2 via the waterproof layer presser 6 by fixing the lower flange edge 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.

A female screw 12 is engraved on the lower inner peripheral surface of the drain pipe portion 5. A male screw 14 formed at the upper end of the gutter pipe 13 is screwed to the female screw 12 to The gutter pipe 13 is connected to the drain pipe section 5. Accordingly, rainwater flowing from the surrounding floor surface f into the tray portion 3 via the narrow water gap 9 of the strainer 8 can be drained from the drainage hole 4 into the gutter pipe 13. .

On the drain body 2, a water-permeable dust-proof casing 15 for covering the strainer 8 is provided. The dustproof housing 15 includes an outer frame 16 made of a wire rod forming a truncated cone-shaped outer shell, and a mesh net 1 of about 5 mesh stretched over the entire outer surface of the outer frame 16.
The dustproof housing 15 is fixed on the drain main body 2 by a fixing device 18 according to the present invention.

As shown in FIGS. 3 and 4, the fixing device 18 has a locking head 19 which is in contact with the surface of the strainer 8.
And a connecting rod 20 projecting upward from the locking head 19 and connected to the dustproof housing 15, and extending from a lower portion of the locking head 19 to the narrow water gap 9 of the strainer 8. An elastic engaging portion 21 is inserted from above, expands in the inserted state, and engages with the back surface of the strainer 8.

In the first embodiment, the locking head 19 and the elastic engaging portion 21 are integrally formed by bending a metal leaf spring. That is, the locking head 19 is formed by bending a central portion of a band-shaped leaf spring into a rectangular cross section so as to have a width wider than the narrow water gap 9 of the strainer 8. The joint 21 is formed by a pair of left and right support legs 22 and 22 extending downwardly from a surplus portion of a leaf spring forming the locking head 19, and the lower ends of the support legs 22 and 22 are turned outward, respectively, and , And a pair of left and right elastic claws 23, 23, which are expanded toward the top. As a result, the elastic engaging portion 21 is provided with retractable elasticity so as to reduce its lateral width. Further, a gap s substantially the same as or slightly larger than the thickness of the strainer 8 is provided between the upper ends of the elastic claw pieces 23 and the lower surfaces 19a and 19a of the locking head 19. In a state where the engaging portion 21 is inserted from above into the narrow water gap 9 of the strainer 8, the upper ends of the elastic claws 23, 23 can engage with the back surface of the strainer 8.

The connecting rod 20 is formed by a screw rod fixed to the upper surface of the locking head 19 by a fixing means such as welding or the like. It is connected to the dustproof housing 15 by a nut 24 screwed. Here, a wing nut is used as the nut 24 so that the screwing operation can be easily performed with bare hands.

The locking head 19, the elastic engaging 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 made of stainless steel. Has become.

In order to fix the dustproof housing 15 on the drain main body 2 by the fixing device 18 having such a configuration, first, the narrow width water gap 9 of the strainer 8 attached to the drain main body 2 is elastically attached. The elastic portion 21 is engaged with the back surface of the strainer 8 by inserting the engaging portion 21 from above. Here, the support leg 2 constituting the elastic engagement portion 21
The overall width of the elastic claws 23 can be reduced by elastic deformation thereof. By inserting the elastic engaging portion 21 into the narrow water gap 9 from above, When the elastic claw pieces 23, 23 are pressed by the left and right side wall surfaces of the narrow water gap 9, the width is automatically reduced, and when the elastic claw pieces 23 pass through the narrow water gap 9, , It expands due to its elasticity, as shown in FIG.
The upper end is engaged with the back surface of the strainer 8. Thus, the fixing device 18 can be operated by one-touch operation of merely pushing the elastic engaging portion 21 into the narrow water gap 9 from above.
Can be easily attached to the strainer 8. Also, at the time of this mounting operation, since the width of the locking head 19 is wider than the narrow water gap 9 of the strainer 8, the lower surfaces 19a, 19a of the locking head 19 abut on the surface of the strainer 8. In addition, the fixing device 18 does not fall into the strainer 8 from the narrow water gap 9.

After the fixing device 18 is attached to the strainer 8 as described above, the dustproof housing 15 is put on the strainer 8. As a result, the connecting rod 20 projecting upward from the locking head 19 is inserted from below into the mesh of the dustproof housing 15, and the nut 24 is screwed onto the protruding end side and tightened to tighten. As shown in FIG. 1, the dustproof housing 15 can be easily fixed. Then, the nut 24 is screwed onto the protruding end side of the connecting rod 20 inserted from below into the dustproof housing 15 and tightened, whereby the dustproof housing 15 is tightened.
Can be fixed, so that there is no need to provide a fixing mounting portion, an opening or the like in the dustproof housing 15, and the structure of the dustproof housing does not become complicated, so that the manufacturing cost does not increase.

By fixing the dustproof housing 15 on the drain main body 2 by the fixing device 18 as described above, displacement of the dustproof housing 15 is prevented, and the dustproof housing 15 is contained in rainwater by the dustproof housing 15. Small garbage can be removed.

FIGS. 5 and 6 show a second embodiment of the fixing device 18. In this embodiment, the structure of the elastic engaging portion 21 in the first embodiment is slightly changed. Part 19
A substantially U-shaped notch 25 is formed in each of the pair of left and right support legs 22 and 22 in which the surplus portion of the leaf spring formed with the lower portion extends downward, and the portion surrounded by the notch 25 is expanded toward the upper side. The elastic claw pieces 23 are pulled out to open. 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 overlapping description will be omitted. Even if the elastic engagement portion 21 is configured as described above, the same operation and effect as those of the first embodiment can be achieved.

FIGS. 7 and 8 show a third embodiment of the fixing device 18. In this embodiment, a locking head 19 having a rectangular cross section and a single unit forming an elastic engaging portion 21 are shown. And the supporting leg 22 are integrally formed of a mold material. A pair of left and right resilient pawls 23, 23 made of a metal leaf spring is fixed to the lower end of the support leg 22 coupled to the lower part of the locking head 19, and the resilient pawls 23, 23 ., The upper end thereof can be engaged with the back surface of the strainer 8. Here, it is possible to use a metal or a synthetic resin for the mold, and when metal is used for the mold, 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. The elastic claw pieces 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 molding material, as shown in FIG.
0 is fixed by embedding its base in the locking head 19. The elastic claw pieces 23 are fixed to the support leg 22 by fixing means such as riveting or bolting.

FIG. 9 shows a fourth embodiment of the fixing device 18, in which a locking head 19 and an elastic engaging portion 21 are provided.
Are integrally formed of a synthetic resin having appropriate elasticity. That is, the elastic engaging portion 21 extends downward from the lower portion of the locking head 19 formed in a rectangular cross section, and the elastic engaging portion 21 includes a pair of left and right support legs 22, 22. At the lower ends of the support legs 22, 22, hook-shaped claw pieces 23 ', 23' that expand toward the top are provided. Support leg 2
2, 22 are provided with split grooves 26 of an appropriate width, the lower portions of which are open.
Are formed in the up-down direction, and when the strainer 8 is inserted into the narrow water gap 9, the elastic engaging portion 21 can be retracted so as to reduce the lateral width thereof by the split groove 26. When ', 23' passes through the narrow water gap 9, it expands due to its elasticity, so that the upper surfaces of the claw pieces 23 ', 23' can be engaged with the back surface of the strainer 8. The connecting rod 20, which is a screw rod projecting upward from the locking head 19, is fixed by embedding a base thereof in the locking head 19.

Also, the fixing device 18 according to the fourth embodiment and the third embodiment can obtain the same operation and effects as those of the first embodiment.

In the first embodiment, the case where the frusto-conical dustproof housing 15 covering the strainer 8 of the circular roof drain 1 is fixed by the fixing device 18 has been described. 18 can also be used for fixing a dustproof housing of a roof drain for a corner having a triangular side cross section.

[0027]

According to the present invention, as described above, the locking head 19 abutting on the surface of the strainer 8 and the locking head 19
Connecting rod 20 projecting upward and connected to the dustproof housing 15
And elastically extending from the lower part of the locking head 19 and being inserted from above into the narrow water gap 9 of the strainer 8, expanding in this inserted state and engaging with the back surface of the strainer 8. Since the fixing device 18 of the dustproof housing 15 is configured by the portion 21, the elastic engaging portion 21 is inserted into the narrow water gap 9 from above with the width reduced, and the elastic engaging portion 21 is The fixing device 18 can be easily attached to the strainer 8 with one touch by being expanded by its elasticity and engaged with the back surface of the strainer 8, and dust is prevented by the connecting rod 20 projecting upward from the locking head 19. The housing 15 can be fixed. Also, during the mounting operation, the locking head 19 comes into contact with the surface of the strainer 8 so that
The fixing device 18 does not fall from the narrow water gap 9 into the 8 strainer.

Further, the connecting rod 20 is constituted by a screw rod which is inserted into the dustproof housing 15 from below and a nut 24 is screwed to a protruding end side thereof, so that the dustproof housing is tightened by the nut 24. 15 can be easily fixed, and it is not necessary to provide the dustproof housing 15 with a mounting portion t, an opening u, and the like (see FIG. 10) as in the related art. The cost does not increase.

Further, the elastic engaging portion 21 is provided with a support leg 22 extending from a lower portion of the locking head 19,
The upper end is formed by a pair of left and right elastic claws 23, 23 which engage with the back surface of the strainer 8 so that the narrow width of the strainer 8 is increased. At the time of insertion into the water gap 9, the elastic claw pieces 23 are pressed by the left and right side walls of the narrow water gap 9 to be automatically narrowed, and the elastic claw pieces 2
When the members 3 and 23 pass through the narrow water gap 9, they expand due to their elasticity, and their upper ends are engaged with the back surface of the strainer 8. Thereby, there is an excellent effect that the fixing device 18 can be easily attached to the strainer 8 only by pushing the elastic engagement portion 21 into the narrow water gap 9 from above.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing an installation state of a fixing device according to a first embodiment.

FIG. 2 is a plan view showing a construction state in which a right half of the dustproof housing is cut out.

FIG. 3 is a front view of the fixing device according to the first embodiment.

FIG. 4 is a side view of the same.

FIG. 5 is a longitudinal sectional view of a fixing device according to a second embodiment.

FIG. 6 is a side view of the same.

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 vertical sectional side view showing a construction state of a conventional configuration.

FIG. 11 is a longitudinal sectional 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 water-passing gap 15 Dustproof housing 18 Fixing device 19 Locking head 20 Connecting rod 21 Elastic engaging part 22 Support leg 23 Elastic claw piece 24 Nut

Claims (3)

[Claims] 1. A roof drain comprising a drain body having a drain hole and a strainer provided with a narrow water gap, and covering the strainer with a water-proof dustproof housing. A locking head abutting on the surface; a connecting rod protruding upward from the locking head and connected to the dustproof housing; and a narrow width of a strainer extending from a lower portion of the locking head. A fixing device for a dustproof housing in a roof drain, comprising: a resilient engaging portion that is inserted from above into a water passage gap, expands in the inserted state, and engages with a back surface of a strainer. 2. A connecting rod is inserted through the dustproof housing from below,
2. The fixing device for a dustproof housing in a roof drain according to claim 1, wherein the protrusion is a screw rod on which a nut is screwed. 3. A support leg extending from a lower portion of the locking head and a lower end of the support leg. The fixing device for a dustproof housing in a roof drain according to claim 1 or 2, wherein the fixing device is constituted by a pair of left and right elastic claw pieces engaged with a back surface.