JP7705276B2 - Passage prevention device - Google Patents

Description

The present invention relates to a passage prevention device for preventing the passage of a specific object.

Conventionally, for example, a rainwater catch basin is known, as described in Patent Document 1 below.

This conventional stormwater catch basin is primarily used as a public stormwater catch basin. During construction, an inlet is formed on the side of the catch basin body using, for example, a hole saw, and a stormwater inlet pipe is connected to the inlet. A lid with a through hole is removably attached to the upper end of the riser pipe.

Design Registration No. 1151425

However, in the conventional case described above, there is a risk that invaders such as pests may enter the rainwater catch basin through the through holes in the lid.

The present invention has been made in consideration of these points, and aims to provide a passage prevention device that can prevent specific objects from passing through.

The passage prevention device of the present invention is a passage prevention device for preventing the passage of a specific object, and includes a base that is attached to a piping section, and a passage prevention body that is attached to the base and has a water passage hole through which the object cannot pass.

The present invention makes it possible to prevent certain objects from passing through.

1 is a cross-sectional view showing an entire manhole device equipped with an intrusion prevention device according to a first embodiment of the present invention; FIG. 2A is a partial perspective view showing the intrusion prevention device, and FIG. 2B is an exploded perspective view showing the intrusion prevention device. 4A and 4B are diagrams showing the installation procedure of the intrusion prevention device. 5(c) to (e) are diagrams showing the installation procedure following FIG. 11A to 11D are diagrams showing the procedure for removing the mud basin container. FIG. 13 is a diagram showing an intrusion prevention device according to a second embodiment of the present invention. FIG. 13 is a diagram showing an intrusion prevention device according to a third embodiment of the present invention. FIG. 13 is a diagram showing an intrusion prevention device according to a fourth embodiment of the present invention.

The first embodiment of the present invention will be described with reference to Figures 1 to 5.

In FIG. 1, 1 is a manhole device. This manhole device 1 is equipped with a rainwater manhole 2, which is a drainage manhole into which rainwater flows, and an intrusion prevention device 3, which is a passage prevention device installed in the rainwater manhole 2 and prevents the passage (intrusion) of pests (such as mosquitoes), which are intruders as specific objects.

The example shown in Figure 1 is an example in which an intrusion prevention device 3 is retrofitted without the use of special tools at any position (desired position) on the inner surface of the riser pipe 7 of an existing rainwater manhole 2 buried underground in order to prevent pests that have passed through the lid 9 from invading into the rainwater manhole 2.

As shown in Fig. 1, the rainwater manhole 2 is made of, for example, synthetic resin, and includes a manhole body 6, a riser pipe (a flow path for drainage water) 7 that is a vertical piping section erected on the manhole body 6, a lid receiver 8 that is fixedly attached to the upper end of the riser pipe 7, and a lid 9 that is removably attached to the lid receiver 8. The rainwater manhole 2 is not limited to being made of synthetic resin, and may be made of, for example, concrete.

The manhole body 6 has an inlet 11, an outlet 12, a cleaning port 13, and a mud basin (container storage) 14. The downstream end of an inlet pipe 16 is connected to the inlet 11, which opens toward one side. The upstream end of an outlet pipe 17 is connected to the outlet 12, which opens toward the other side. The lower end of a riser pipe 7, which is a cylindrical cleaning pipe, is connected to the cleaning port 13, which opens toward the top.

The mud collection section 14 removably houses the mud collection container 18, which is a cylindrical container with a bottom and an open top. The mud collection container 18 has a container body 19 in which rainwater, mud, etc. are collected, and a handle 20 provided at the upper end of the container body 19. Note that if, for example, a mosquito gets into the manhole body 6, there is a risk that mosquito larvae will appear in the rainwater collected in the mud collection container 18.

The lid receiving body 8 has an insertion part 21, which is a connection part fixedly connected to the inner periphery of the upper end of the riser pipe 7, and a lid receiving part 22 to which the lid body 9 is removably fitted. A circular opening 23 is formed in the lid receiving part 22, and this opening 23 is closed by the lid body 9 so as to be able to open and close. This opening 23 is formed in the upper part of the internal space 24 of the short cylindrical lid receiving body 8.

The lid receiving portion 22 also has an inwardly protruding, annular support portion 25 that receives and supports the underside of the outer periphery of the lid body 9. The inner diameter of this support portion 25 is smaller than the inner diameter of the riser pipe 7.

The lid receiving body 8 is not limited to a configuration in which it is connected to the inner periphery of the upper end of the riser pipe 7, but may be configured to have a connection part (receiving port) that is connected to the outer periphery of the upper end of the riser pipe 7, etc.

The lid body (lattice lid) 9 has multiple through holes 28 that penetrate the top and bottom surfaces. Each through hole 28 is large enough to allow not only rainwater but also pests such as mosquitoes to pass through. Therefore, an intrusion prevention device 3 is disposed below the lid body 9 to prevent pests that have passed through the through holes 28 from invading a specified position (for example, invading the mud collection container 18 below).

As shown in FIG. 2, the intrusion prevention device (pest intrusion prevention device) 3 is equipped with a base 31, which is a C-shaped support body that can expand and contract based on deformation and is fixedly attached to any position on the inner surface of the riser pipe 7 of the rainwater manhole 2, and an intrusion prevention body 32, which is a passage prevention body that is detachably attached to the base 31 and has multiple water passage holes 33 that are holes that penetrate the top and bottom surfaces.

Each water passage hole 33 of the intrusion prevention body 32 is smaller than the through hole 28 of the cover body 9, and is formed to a size that allows rainwater to pass through but does not allow pests (targets) of a certain size to pass through. Specifically, the water passage holes 33 are formed to a smaller size, for example, about 3 mm to 4 mm, so that mosquitoes of a size of 4.5 mm to 5.5 mm cannot pass through.

The base 31 is composed only of a C-shaped member 35 made of, for example, an elastically deformable synthetic resin. This C-shaped member 35 is a strip-like member curved into a C-shape in plan view, with a notch 36 in one circumferential direction. The C-shaped member 35 also has a mounting surface 37 on its outer circumferential surface that is fixedly attached to the inner circumferential surface of the riser pipe 7, and a support portion 38 on its upper portion to which the outer circumferential portion of the intrusion prevention body 32 is detachably attached and which supports (positions and fixes) the outer circumferential portion.

The outer diameter of the base 31 consisting only of such C-shaped members 35 is larger than the inner diameter of the riser pipe 7 before it is elastically deformed toward the radially inward, i.e., the reduced diameter side (expanded state before attachment to the piping section), but is the same as the inner diameter of the riser pipe 7 after it has elastically deformed toward the reduced diameter side (reduced diameter elastic deformation) (reduced state after attachment to the piping section).

Therefore, as is clear from FIG. 2(a), the base 31 after the diameter reduction elastic deformation is fixedly attached in close contact with the inner circumferential surface of the riser pipe 7 by the elastic restoring force based on the elastic deformation. The inner diameter of the base 31 in the reduced state after attachment is larger than the outer diameter of the mud container 18 located below. In other words, the mud container 18 can pass through the base 31 in the reduced state. The base 31 may be firmly fixed to the inner circumferential surface of the riser pipe 7 using a fixing means such as an adhesive. The base 31 is not limited to the C-shaped member 35, and may be a plate-shaped member that follows the wall inside the pipe and serves as a part (hook part) on which the intrusion prevention body 32 is hooked.

The intrusion prevention body (mesh body) 32 is composed of multiple, for example, elastically deformable members, i.e., two members. Specifically, as is clear from FIG. 2(b), the intrusion prevention body 32 is composed of an elastic member 41, which is a circular rubber elastic member that is detachably attached to the support portion 38 of the base body 31 in the attached state and supported in a resting state, and a mesh member 42, which is a disk-shaped metallic mesh member that is detachably fitted and held in the groove portion 43 of the elastic member 41.

The elastic member 41 has a groove portion 43 on the inner periphery, which is a holding portion that holds the outer periphery of the mesh member 42, and has a fitting recess 44 on the underside of the outer periphery, which is a fitting portion that can be detachably fitted with the support portion 38 of the base 31. The elastic member 41 also has an attachment surface portion 45 on its outer periphery that can be detachably attached to the inner periphery of the riser pipe 7. The outer diameter of the elastic member 41 is the same as or slightly larger than the inner diameter of the riser pipe 7.

The mesh member 42 is formed in a flat net (mesh) shape with multiple water holes 33 through which rainwater can pass (and air can pass) but pests cannot. The mesh member (net) 42 is removably attached to the base (net receiver) 31 via an elastic member 41 that is removably (or may not be removably) attached to the outer peripheral frame 47.

In other words, the elastic member 41 is a connecting member for detachably connecting the mesh member 42 to the base body 31. That is, the intrusion prevention body 32 has the elastic member 41, which is an elastically deformable ring-shaped elastic part, on the outer periphery, and this elastic member 41 is located between the base body 31 and the mesh member 42.

The mesh member 42 may be attached directly to the base 31 without using the elastic member 41. The mesh member 42 may be made of not only metal (if metal, SUS is preferable from the viewpoint of corrosion prevention), but also polymeric material. If it is made of resin, a mesh having a predetermined periodic structure using polyvinyl chloride or the like, which has excellent moldability, or a nonwoven fabric having a predetermined opening diameter may be used. Furthermore, if the material has high friction resistance against the resin pipe, it can be easily fixed to the wall surface (inner surface) of the piping section. Examples of such materials include rubber and elastomer.

Next, we will explain the installation procedure for installing the intrusion prevention device 3 in an existing rainwater manhole 2.

First, as shown in Figures 3(a) and (b), the worker removes the lid body 9 from the lid receiving body 8 to open the opening 23, and then applies pressure from both sides to the expandable and contractible base body 31, causing the base body 31 to elastically deform and shrink in diameter, and passes through the internal space 24 of the lid receiving body 8 and inserts it into the riser pipe 7.

When the pressing force is released at any position within the riser pipe 7, the base 31 expands in diameter due to the elastic restoring force of the base 31, and is fixedly attached to the inner surface of the riser pipe 7 at any position. In this way, the base 31 is simply fixed to the desired position on the inner surface of the riser pipe 7. The base 31 may be bonded to the inner surface of the riser pipe 7 using an adhesive, for example.

Next, as shown in Figures 4(c) and (d), the worker inserts the expandable intrusion prevention body 32, i.e., the mesh member 42 with the elastic member 41 attached to the outer periphery (in other words, the mesh member 42 set on the inner periphery of the elastic member 41) into the riser pipe 7 through the internal space 24 of the lid receiving body 8 while slightly reducing its diameter and elastically deforming it, and removably attaches it to the base body 31.

In other words, the intrusion prevention body 32 is fitted and placed from above the base body 31, which is in a reduced state and fixedly attached at a desired position on the inner surface of the riser pipe 7.

In this way, the intrusion prevention body 32 is supported in a horizontal position by the base body 31 fixed to the piping section, and is positioned and fixed at any position within the riser pipe 7.

At this time, the support portion 38 of the base 31 and the mating recess 44 of the intrusion prevention body 32 are removably mated with each other. However, instead of such mating, the intrusion prevention body 32 may be attached by simply placing it on the base 31, or the intrusion prevention body 32 may be removably attached to the base 31 by a relatively simple means such as a magnet, hook-and-loop fastener, taper (fitting), etc. In short, any means for separably connecting the base 31 and the intrusion prevention body 32 is possible.

Next, as shown in FIG. 4(e), the worker finally attaches the lid body 9 to the lid receiving body 8 to close the opening 23, completing the installation of the intrusion prevention device 3.

In this way, the worker can install the intrusion prevention device 3 at any position on the inner surface of the riser pipe 7 of the existing rainwater manhole 2 without using any special tools.

In the example shown above, the intrusion prevention body 32 is inserted (removable) into the rainwater manhole 2 while still in the set state, with the elastic member 41 attached to the outer periphery of the mesh member 42 in advance. However, for example, the elastic member 41 may be inserted into the rainwater manhole 2 and attached to the base 31, and then the mesh member 42 may be attached to the attached elastic member 41. This is also true for the example shown in FIG. 5, which will be described later. After the mesh member 42 is removed from the elastic member 41, the elastic member 41 may be removed from the base 31.

Next, we will explain the procedure for removing the mud collection container 18 from the rainwater manhole 2.

When removing the mud collection container 18 in which sediment 50 consisting of mud and other materials containing rainwater has accumulated in the container body 19 as shown in FIG. 5(a) from the mud collection section 14 of the rainwater manhole 2, the worker first removes the lid body 9 from the lid receiving body 8 to open the opening 23 as shown in FIG. 5(b).

Next, as shown in FIG. 5(c), the worker removes the intrusion prevention body 32 from the base body 31 while it is still set, and then passes the intrusion prevention body 32 through the internal space 24 of the lid receiving body 8 while slightly reducing its diameter and elastically deforming it, and removes it from the rainwater manhole 2. At this time, the base body 31 remains fixed to the inner peripheral surface of the riser pipe 7. Note that the base body 31 may be removed from the rainwater manhole 2 as necessary, and the mounting position of the base body 31 can also be adjusted as appropriate.

Next, as shown in FIG. 5(d), the worker lifts the mud container 18 by the handle 20, passing the mud container 18 through the base body 31 and the lid receiving body 8 in sequence, and removes it from the rainwater manhole 2. This completes the removal process of the mud container 18.

After removing the sediment 50 from the mud container 18, the mud container 18 is returned to its position within the mud container section 14, and the intrusion prevention body 32 is attached to the base body 31 to return it to its original state.

The above-mentioned intrusion prevention device 3 can appropriately prevent pests such as mosquitoes (the target intruder) from invading the manhole body 6 of the rainwater manhole 2, thereby effectively preventing the occurrence of mosquito larvae and the like in the rainwater in the mud collection container 18.

In addition, for example, pests that accidentally enter the manhole main body 6 through the inlet 11 or outlet 12, or adults that develop from larvae such as mosquito larvae in the mud collection container 18, cannot pass through the intrusion prevention body 32, preventing the spread of pests and adults (not only flying pests such as mosquitoes, but also pests larger than a certain size, such as myriapods such as centipedes) outside the rainwater manhole 2. Therefore, by preventing passage into the manhole main body 6 and also outside the manhole main body 6, the reproduction and spread of pests can be prevented.

In addition, objects larger than the water passage hole 33 of the intrusion prevention body 32 (for example, objects between 4.5 mm and 5.5 mm in size or larger (for example, stones, fallen leaves, cigarette butts, and other debris)) cannot pass through the intrusion prevention body 32, so it is possible to prevent such large objects from accumulating and clogging the mud collection container 18.

The intrusion prevention device 3 can be easily retrofitted at any position on the inner surface of the riser pipe (piping section) 7 of an existing rainwater manhole 2 without using any special tools, and the mud collection container 18 can also be easily cleaned. Therefore, for example, there is no need to design a dedicated manhole, and the intrusion prevention device 3 can be easily installed in any existing manhole without tools. The intrusion prevention device 3 can also be easily installed in a newly constructed manhole at any position on the inner surface of the riser pipe 7 without tools.

Furthermore, the intrusion prevention device 3 includes a base 31 that can be attached at any position on the inner surface of the riser pipe 7 of the rainwater manhole 2, and an intrusion prevention body 32 that is separate from the base 31 and can be detachably attached to the base 31, so that it can be easily and appropriately installed at any position within the riser pipe 7.

In addition, the intrusion prevention body 32 has an elastic member 41 that is removably attached to the base body 31, and a mesh member 42 that is held removably (replaceably) by this elastic member 41, so that if the mesh member 42 is damaged, only the mesh member 42 can be replaced.

Furthermore, the base 31 is composed of a C-shaped member 35 that can elastically deform (expand and contract) radially inward, so that it can easily pass through the internal space 24 of the lid receiving body 8 and can be appropriately adapted to various riser pipes 7 with different inner diameters.

Next, a second embodiment of the present invention will be described with reference to FIG.

The intrusion prevention body 32 of the intrusion prevention device 3 shown in Figure 6 has a mesh member 42 formed in an inverted bowl shape that is convex upward. Therefore, even if foreign matter such as garbage flows into the riser pipe 7 together with rainwater, the foreign matter is guided toward the outer periphery of the inverted bowl-shaped mesh member 42 and accumulates on the elastic member 41, so that it is less likely to accumulate on the mesh member 42 and less likely to cause clogging.

The mesh member 42 may be formed, for example, in a downwardly convex bowl shape, or in an inclined shape inclined relative to the horizontal direction, or may be in a cone shape, pyramid shape, etc.

Next, the third embodiment of the present invention will be described with reference to FIG.

The intrusion prevention device 3 shown in Figure 7 does not have a base body 31, and is composed only of a deformable (expandable) mesh-like intrusion prevention body 32. This intrusion prevention body 32 is detachably attached to any position on the inner surface of the riser pipe 7 by the elastic restoring force of the elastic member 41 that is elastically deformed by contracting in diameter.

The intrusion prevention body 32 in each of the above-mentioned embodiments may have an operating part such as a handle, a chain, or a string, so that the intrusion prevention body 32 can be easily attached and detached. Furthermore, the elastic member 41 and the mesh member 42 of the intrusion prevention body 32 may be kneaded or impregnated with a chemical such as a repellent or insecticide, so that the chemical dissolves or seeps out with rainwater and accumulates in the mud collection container 18.

Next, the fourth embodiment of the present invention will be described with reference to FIG.

The intrusion prevention device 3 shown in Figure 8, like that shown in Figure 7 above, does not have a base 31 and is composed only of a deformable (expandable and contractible) mesh-like intrusion prevention body 32. This intrusion prevention body 32 is selectively deformable (switchable) between a first state, a contracted state, in which it can be inserted and removed (taken in and out) from the riser pipe 7, and a second state, an expanded state, in which it can be removably attached to any position on the inner surface of the riser pipe 7.

For example, the intrusion prevention body 32 itself has a structure that can be expanded and contracted, and the intrusion prevention body 32, which has been contracted in advance, can be expanded from the contracted state by a one-touch operation inside the riser pipe 7, and based on this deformation, the intrusion prevention body 32 can be detachably attached to any position on the inner surface of the riser pipe 7.

It is preferable that such an intrusion prevention body 32 is configured to selectively transform into a contracted state or an expanded state based on a single touch operation, but it is not limited to this configuration and may be configured to transform through multiple operations, etc.

In addition, in all of the above embodiments, the piping section (pipe section through which the fluid flows) in which the passage prevention device is installed is described as a riser pipe (vertical pipe), but it is not limited to a pipe, and may be, for example, a part of the manhole body or a part of the lid receiving body, and it does not matter whether it is vertical or horizontal.

In addition, the materials of the piping and the components that make up the passage prevention device may be any material other than those mentioned above.

Furthermore, the passage prevention body (passage prevention device) is preferably configured in a mesh-like manner with a mesh portion in at least a portion (preferably substantially the entirety), but is not limited to a mesh-like configuration, and may be configured in any manner as long as it has water passage holes that allow water to pass through but prevent a specific object from passing through.

Furthermore, the base is not limited to being made up of only one member (e.g., a C-shaped member) and may be made up of, for example, multiple members.

Although several embodiments and variations of the present invention have been described, it is possible to combine the embodiments and variations as appropriate without departing from the spirit of the present invention.

REFERENCE SIGNS LIST 1 : Manhole device 3 : Intrusion prevention device which is a passage prevention device 7 : Standpipe which is a piping part 18 : Mud collecting vessel which is a vessel 31 : Base body 32 : Intrusion prevention body which is a passage prevention body 33 : Water passage hole 41 : Elastic member which is an elastic part

Claims (7)

A passage prevention device for preventing the passage of a specific object,
A base body that is attached at an arbitrary position on an inner peripheral surface of a cylindrical pipe that is a piping portion;
a passage prevention body attached to the base, the entirety of which is located within the cylindrical tube, and which has a water passage hole through which the object cannot pass. The base body is attached to an arbitrary position on the inner circumferential surface of a cylindrical tube based on elastic deformation ,
The passage prevention body is mounted on the base body mounted at the arbitrary position, and the entirety of the passage prevention body is positioned within the cylindrical tube.
2. The passage prevention device according to claim 1, The substrate is elastically deformable,
The passage prevention device according to claim 1 or 2, characterized in that the outer diameter of the base body is larger than the inner diameter of the cylindrical tube before it is elastically deformed in the diameter-reducing direction, but is the same as the inner diameter of the cylindrical tube after it is elastically deformed in the diameter-reducing direction. 4. The passage prevention device according to claim 1, wherein the base body is an elastically deformable C-shaped member. 5. The passage prevention device according to claim 1, wherein the base body is an elastically deformable curved strip having a notch in a part of its circumferential direction. A passage prevention device for preventing the passage of a specific object,
a passage prevention body having a water passage hole through which the object cannot pass,
The passage prevention body is attached to an arbitrary position on the inner circumferential surface of a cylindrical pipe that is a piping section based on elastic deformation , and the entirety of the passage prevention body is positioned within the cylindrical pipe.
A passage prevention device characterized by the above. A passage prevention device for preventing the passage of a specific object,
a passage prevention body having a water passage hole through which the object cannot pass,
the passage prevention body is deformable between a contracted state in which it can be inserted into and removed from a cylindrical pipe that is a piping section, and an expanded state in which it can be attached to an arbitrary position on an inner circumferential surface of the cylindrical pipe ,
The passage prevention body is attached to the arbitrary position based on the deformation by being deformed from the contracted state to the expanded state within the cylindrical pipe, and the entirety of the passage prevention body is positioned within the cylindrical pipe.
A passage prevention device characterized by the above.

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