JP4229324B2 - Cap device for vent lid - Google Patents

Description

  The present invention relates to a cap device for a vent lid that has a small height dimension and can prevent the inflow of water even when submerged to a height dimension.

  As shown in FIG. 6, the drainage pipe 10 which is piped outdoors and the drainage branch pipe 12 which drains water from the indoor basin 11 and the like are usually made of synthetic resin drainage. A fence 13 is installed. A U-shaped trap 14 is provided between the drainage branch pipe 12 and the drainage basin 13 so that odors do not flow back indoors from the drainage main pipe 10 through the drainage branch pipe 12, and drainage directly below the basin 11 or the like. An S-shaped trap 15 is also provided in the branch pipe.

  When the double trap state is obtained by providing the U-shaped trap 14 and the S-shaped trap 15 as described above, when the drainage is performed from the basin 11 or the like, the drainage branch pipe 11 between both the traps 14 and 15 The air is compressed so that it becomes difficult for water to flow smoothly, or the pressure is reduced immediately after the end of drainage and the sealed water of the S-shaped trap 15 is destroyed. Such inconvenience also occurs when a trap having a shape or structure other than the S-shaped trap is provided directly below the washbasin 11 or the like. Therefore, in order to eliminate this inconvenience, the upper end opening of the cleaning pipe 16 extending upward from the U-shaped trap 14 is covered with a ventilating lid 17 so that the air pressure of the drainage branch pipe between the traps 14 and 15 varies. Control measures are taken.

  As such a ventilation lid, what was described in Unexamined-Japanese-Patent No. 9-328793 is known. This vent lid is formed by stacking an air vent on the lid and attaching it to the center hole of the lid, and a T-shaped vent path is formed inside the air vent. This T-shaped air passage is open at the sides of the air vent body so that rain does not enter.

However, the above air vent body is open to the side of the air vent body at the left and right ends of the air vent, so that it is easy to flood up to a height exceeding the air vent when heavy rain falls. There was a problem of inflow. When rainwater flows in this way, the soil also enters the ventilation path together with the rainwater, which causes a problem that the ventilation path is easily clogged with soil. To solve these problems, the height of the air vent body should be increased to increase the position of the air passage. However, if the height dimension of the air vent body is increased, the pedestrian will stumble on the air vent body. There was a problem.
JP 9-328793 A

  The present invention has been made to cope with the above-mentioned problems, and has a height dimension smaller than that of a conventional air vent, and can be freely ventilated for a vent lid that can prevent inflow of rainwater even when submerged to a height close to the height dimension. It is an object of the present invention to provide a cap device.

  In order to solve the above-described problems, a cap device for a vent lid according to the present invention includes a cap having a plurality of leg pieces formed on the back surface of the top plate, and a cap base having a cylindrical portion projecting downward from the bottom of the housing recess. A cap device for a vent lid comprising: a cap leg piece fitted into the cylindrical portion of the cap base, and the top plate of the cap floating in a state of floating from the bottom surface of the cap base receiving recess. In addition, a ventilation gap is formed between the top plate of the cap and the inner side surface of the housing recess of the cap base.

  In the vent lid cap device of the present invention, the upper end of the cap base portion protrudes above the bottom surface of the cap base receiving recess, and the step formed on the leg of the cap engages with the upper end of the tube portion. It is desirable that the cap top plate is accommodated in the accommodation recess in a state where it is lifted from the bottom surface of the accommodation recess of the cap base. The cap recess of the cap base is formed in a circular recess, and the cap top plate is a circle with protrusions projecting a plurality of protrusions outward from a circular plate having a diameter smaller than the diameter of the storage recess. It is desirable that the tip of the projecting piece be formed on the plate and be close to the inner side surface of the housing recess of the cap body. Furthermore, the top surface of the cap base is inclined so as to become lower from the housing recess toward the outer edge, and the top surface of the cap top plate formed on the circular plate with the protruding piece is the same height as the top surface around the housing recess of the cap base. It is desirable that the bank portion is formed on the outer edge portion of the top plate of the cap excluding the tip edge of the projecting piece.

  The cap device for a vent lid according to the present invention includes a ventilation gap formed between the top plate of the cap and the inner side surface of the cap recess and the bottom surface of the cap recess of the cap base. The space, the space between the leg pieces of the cap, and the internal space of the cylindrical portion of the cap base form an air passage through which air can flow continuously, so that air freely enters and exits through the air passage. The upper end of the ventilation path is a ventilation gap between the top plate of the cap and the inner side surface of the housing recess of the cap base, and opens to the upper surface of the ventilation lid cap device. Even if it is submerged close to the height dimension (which means the height dimension excluding the cylinder portion of the cap base, the same applies hereinafter), rainwater does not flow from the ventilation gap that opens to the upper surface. Therefore, the height of the cap device for the vent lid can be made smaller than that of the conventional air vent body. For example, when the waterproof performance against the flooding of 10 mm of the Japan Sewerage Association standard is secured, the cap device for the vent lid It is only necessary to make the height dimension slightly larger than 10 mm. As described above, since the height of the vent lid cap device of the present invention can be reduced, the worry of a pedestrian tripping is reduced.

  In addition, when the cap device for the vent lid of the present invention is constituted by two members, that is, a cap and a cap base, dirt and the like from the air gap between the top plate of the cap and the inner surface of the cap recess of the cap base. Even when the container enters the housing recess, the cap can be removed from the cap base and the housing recess and the air passage can be easily cleaned.

  Next, in the vent lid cap device of the present invention, the upper end of the cylindrical portion of the cap base protrudes upward from the bottom surface of the housing recess, and the step formed on the leg piece of the cap is locked to the upper end of the cylindrical portion. In the case where the top plate of the cap is housed in the housing recess in a state where it floats from the bottom surface of the housing recess of the cap base, even if a load is applied to the cap, the stepped portion of the leg piece is the upper end of the cylindrical portion. Therefore, there is no fear that the top plate of the cap is pushed into the receiving recess of the cap base and overlaps the bottom surface of the receiving recess to block the air passage. If the upper end of the cylindrical portion of the cap base protrudes above the bottom surface of the receiving recess, an annular groove is formed between the cylindrical portion and the inner side surface of the receiving recess. Even if a small amount of raindrops or dust enters from the ventilation gap between the plate and the inner surface of the housing recess, it can be received by the annular groove so as not to pass through the cap device.

  In the vent lid cap device of the present invention, the cap recess of the cap base is formed in a circular recess, and the top plate of the cap has a plurality of outward faces from a circular plate having a diameter smaller than the diameter of the recess. It is formed in a circular plate with a projecting piece with a projecting piece, and the tip of the projecting piece is close to the inner surface of the housing recess of the cap body. Since the planar shape of the air gap formed between the side surfaces is an arc shape, even if an object is dropped on the air gap, it is difficult for the object to fit into the air gap.

  Furthermore, in the vent lid cap device of the present invention, the top surface of the cap base is inclined so as to become lower from the housing recess toward the outer edge, and the top surface of the top plate of the cap formed on the circular plate with the projecting piece is the top surface of the cap base. If the embankment is formed on the outer edge of the top plate of the cap, excluding the tip edge of the projecting piece, the same height as the upper surface around the housing recess, rainwater that has poured onto the top plate of the cap is vented by the embankment Since it is guided toward the projecting piece so as not to enter the gap and flows down the inclined upper surface of the cap base through the upper surface of the projecting piece, the amount of rain entering the ventilation gap can be greatly reduced.

  Hereinafter, the best embodiment of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to this embodiment alone.

  1 is an exploded perspective view showing a vent lid cap device and a vent lid according to an embodiment of the present invention, FIG. 2 is a perspective view of the vent lid to which the cap device is attached, and FIG. 3 is a line AA in FIG. 4 is an enlarged sectional view taken along line BB in FIG. 2, and FIG. 5 is an exploded sectional view of the cap device.

  The cap device 1 for a vent lid is composed of a synthetic resin cap 2 and a synthetic resin cap base 3. The cap 2 has a pair of leg pieces 2b and 2b on the back surface of the top plate 2a. Is formed. The circular cap base 3 is formed with a circular accommodating recess 3a at the center thereof, and a cylindrical portion 3b is projected downward from the bottom of the accommodating recess 3a. The vent lid 4 for attaching the cap device 1 is formed with a hole 4a for fitting the cylindrical portion 3b of the cap base 3 at the center thereof.

  As shown in FIG. 5, the cylindrical portion 3b of the cap base 3 has an upper end 3c protruding upward from the bottom surface 3d of the accommodating recess 3a, and between the upper end 3c of the cylindrical portion 3b and the inner side surface 3e of the accommodating recess 3a. Is a shallow annular groove 3f. And the to-be-engaged convex part 3g provided with the mountain-shaped cross-sectional shape which protrudes inside is formed in the upper inner peripheral surface of this cylinder part 3b.

  On the other hand, the leg pieces 2b, 2b of the cap 2 are formed in a circular arc shape so as to oppose each other so as to be fitted to the cylindrical portion 3b of the cap base 3, and as shown in FIG. On the outer surface, there is formed an engaging convex portion 2c having a mountain-shaped cross-sectional shape that engages with the engaged convex portion 3g of the cylindrical portion 3b from below. And the step part 2d is formed in the outer surface of the leg piece 2b above this engaging convex part 2c.

  As shown in FIGS. 3 and 4, the cap 2 has a pair of leg pieces 2b and 2b fitted into the cylindrical portion 3b of the cap base 3, and the engaging projection 2c of each leg piece 2b is connected to the cylindrical portion 3b. The top plate 2a of the cap 2 accommodates the cap base 3 by engaging with the engaged convex portion 3g from below and engaging the step 2d of each leg piece 2c with the upper end 3c of the cylindrical portion 3b. It is accommodated in the accommodating recess 3a in a state where it floats from the bottom surface 3d of the recess 3a and the upper end 3c of the cylindrical portion 3b. Therefore, even if a load is applied to the cap 2, the step 2d of the leg piece is locked to the upper end of the cylindrical portion 3b, so there is no concern that the top plate 2a will be pushed into the receiving recess 3a. Even if a small external force in the pulling direction is applied to the cap 2, the cap 2 does not come off because the engaging projection 2 c is engaged with the engaged projection 3 g from below. However, when a large external force in the pulling direction is applied to the cap 2, the engagement convex portion 2c and the engaged convex portion 3g are disengaged and the cap can be pulled out.

  As shown in FIG. 1, the top plate 2a of the cap 2 has two projecting pieces 2f and 2f projecting outward from a circular plate 2e having a diameter smaller than the diameter of the circular accommodating recess 3a of the cap base 3. It is formed in a circular plate with protrusions. And in the state which accommodated this top plate 2a in the accommodation recessed part 3a as shown in FIG. 2, the convex front end surface of both protrusions 2f and 2f adjoins the inner surface of the accommodation recessed part 3a, and the top plate 2a Ventilation gaps 5 and 5 having an arcuate planar shape are formed between the outer peripheral surface of the circular plate 2e and the inner surface of the housing recess 3a. Thus, when the ventilation gaps 5 and 5 are formed in an arc shape, there is an advantage that even if an object is dropped on the ventilation gaps 5 and 5, it is difficult to fit into the ventilation gap.

  The upper surface of the top plate 2a formed on the circular plate with the projecting pieces is the same height as the upper surface around the housing recess 3a of the cap base 3, and the projecting pieces 2f and 2f are removed from the top edge of the cap. A bank portion 2g is formed on the outer edge of 2a. And the upper surface 3h of the cap base | substrate 3 inclines so that it may become so low that it approaches an outer edge from the center accommodation recessed part 3a. Accordingly, the rainwater poured on the top plate 2a of the cap is guided toward the projecting pieces 2f and 2f by the bank 2g so as not to enter the ventilation gaps 5 and 5 and passes through the upper surfaces of the projecting pieces 2f and 2f. It flows down the inclined upper surface 3 h of the cap base 3.

  Reference numeral 2h denotes a driver insertion recess formed on the outer peripheral surface of the top plate 2a. When a driver is inserted from the recess 2h and a force in the pulling direction is applied to the cap 2, the cap 2 is removed as described above. The cap base 3 can be pulled out from the housing recess 3a.

  As shown in FIGS. 3 and 4, the vent lid cap device 1 according to this embodiment is configured such that the leg pieces 2 b and 2 b of the cap 2 are fitted into the cylindrical portion 3 b of the cap base 3 and the top plate of the cap 2. 2a is housed in the housing recess 3a in a state of being floated from the bottom surface 3d of the housing recess 3a of the cap base 3 and the upper end 3c of the cylindrical portion, and an arc-shaped ventilation gap is formed between the top plate 2 and the inner surface 3e of the housing recess 3a. 5 and 5, as shown in FIG. 4, the air gaps 5 and 5, the space between the bottom surface 3d of the housing recess 3a and the top plate 2a, and the leg pieces 2b and 2b The mutual space and the internal space of the cylindrical portion 3b are continuous with each other to form an air passage through which air can flow. Therefore, the vent lid cap device 1 is placed on the vent lid 4, and the cylindrical portion 3 b of the cap base 3 is fitted into the central hole 4 a of the vent lid 4 to attach the vent lid cap device 1. 4 is attached to the upper end opening of the cleaning pipe 16 in place of the conventional vent lid 17 shown in FIG. 6, if the internal air pressure of the drainage branch pipe 12 is likely to rise, the vent passage cap of the vent lid cap device 1 passes through the vent passage. Air is discharged to the outside, and conversely, if the internal air pressure of the drainage branch pipe 12 is likely to decrease, the air is sucked in and the fluctuation of the internal air pressure of the drainage branch pipe 12 is suppressed. It is possible to prevent sealing water destruction of the S-shaped trap 15.

  The upper end of the ventilation path of the vent lid cap apparatus 1 is the above-described vent gaps 5 and 5 and is open on the upper surface of the vent lid cap apparatus 1, so that as shown in FIG. Even if submerged to near the height dimension H of the cap device for the vent lid excluding the cylinder portion 3b (in other words, the thickness dimension of the cap base body 3 excluding the cylinder portion 3b), the vent gaps 5 and 5 open to the upper surface. Rainwater never flows in. Therefore, it is possible to considerably reduce the height dimension H of the vent lid cap device 1 as compared with the conventional air vent body, and as described above, the waterproof performance against the flooding of 10 mm of the Japan Sewerage Association standard is ensured. For this, the height dimension H only needs to be slightly larger than 10 mm. As described above, the vent lid cap device 1 of the present invention can reduce the height dimension H, thereby reducing the risk of a pedestrian tripping.

  In addition, the cap device 1 for the vent lid is composed of two members, that is, a cap 2 and a cap base 3, and the above-described annular groove 3f is formed in the bottom of the cap recess 3a of the cap base. , 5 even if some raindrops or earth and sand enter the housing recess 3a, it can be received by the annular groove 3f. As described above, the cap 2 is removed from the cap base 3 to clean the housing recess 3a and the air passage. It can be done easily. Therefore, maintenance is easy.

  Further, the step 2 d formed on the leg pieces 2 b, 2 b of the cap 2 is locked to the upper end 3 c of the cylindrical portion 3 b of the cap base 3, and the top plate 2 a of the cap is the upper end of the cylindrical portion of the accommodating recess 3 a of the cap base 3. Since it is accommodated in the accommodation recess 3a in a state of floating from the bottom surface 3c and the bottom surface 3d, even if a load is applied to the cap 2, the top plate 2a of the cap is pushed into the accommodation recess 3a of the cap base and the accommodation recess 3a There is no concern that the air passage is blocked by overlapping the upper end 3c and the bottom surface 3d of the cylinder portion. The rainwater that has poured onto the top plate 2a of the cap 2 is guided toward the projecting pieces 2f and 2f by the bank 2g so as not to enter the ventilation gaps 5 and 5, and passes through the upper surfaces of the projecting pieces 2f and 2f. Since it flows down the inclined upper surface 3h of the cap base 3, the amount of rain entering from the ventilation gaps 5, 5 can be greatly reduced.

It is a disassembled perspective view which shows the cap apparatus for ventilation lids and ventilation lid which concern on one Embodiment of this invention. It is a perspective view of the ventilation lid which attached the same cap apparatus. It is an expanded sectional view along the AA line of FIG. It is an expanded sectional view along the BB line of FIG. It is an exploded sectional view of the cap device. It is explanatory drawing of the usage example of the ventilation lid which attached the same cap apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cap device for vent lids 2 Cap 2a Cap top plate 2b Cap leg piece 2d Leg step 2e Top plate circular plate 2f Top plate protrusion 2g Top plate bank 3 Cap base 3a Housing recess 3b Tube Portion 3c Upper end of cylindrical portion 3d Bottom surface of receiving recess 3e Inner side surface of receiving recess 3f Annular groove of receiving recess 3h Upper surface of cap base 4

Claims (4)

  A cap device for a vent lid comprising a cap having a plurality of leg pieces formed on the back surface of the top plate and a cap base having a cylindrical portion projecting downward from the bottom of the housing recess, the cap leg piece being a cap The cap top plate is fitted in the cylindrical portion of the base and is received in the receiving recess in a state of floating from the bottom surface of the cap base receiving recess, and the cap top plate and the inner surface of the cap base receiving recess A vent lid cap device, characterized in that a vent gap is formed between the cap and the vent cap.   The upper end of the cylindrical portion of the cap base protrudes above the bottom surface of the receiving recess, the step formed on the leg piece of the cap is locked to the upper end of the cylindrical portion, and the top plate of the cap becomes the receiving recess of the cap base. The cap device for the vent lid according to claim 1, wherein the cap device is housed in the housing recess in a state where it floats from the bottom surface of the air cap.   The cap concave portion of the cap base is formed in a circular concave portion, and the top plate of the cap is a circular plate with protruding pieces projecting a plurality of protruding pieces outward from a circular plate having a diameter smaller than the diameter of the receiving concave portion. The vent lid cap device according to claim 1 or 2, wherein the cap is formed so that a tip of the projecting piece is close to an inner side surface of the housing recess of the cap body.   The top surface of the cap base is inclined so as to become lower as it approaches the outer edge from the housing recess, and the top surface of the top plate of the cap formed on the circular plate with the protruding piece becomes the same height as the top surface around the housing recess of the cap base. The vent lid cap device according to claim 3, wherein a bank portion is formed on an outer edge portion of the top plate of the cap excluding a tip edge of the projecting piece.

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