JPH0415824Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a rat intrusion prevention device that prevents rats from entering indoor rooms through drains that open above bathrooms, washrooms, etc. .

[Prior Art] Conventionally, a perforated plate was simply placed on a drain socket, but if the weight of the perforated plate was less than the ability of a mouse to push it up, a mouse could pull the perforated plate, which is the drain cover, from below. They may push up and invade rooms such as bathrooms.

To solve this problem, a device for preventing the intrusion of rats has been disclosed in which a wire mesh or a plurality of partition plates are provided at the outlet of the drain pipe (Utility Model Application No. 58-10986, Utility Model Application No. 59-35472).
In addition, in order to prevent rats from entering through the drain opening that opens upward, threads are cut on the inner periphery of the drain socket and the outer periphery of the perforated plate, and the perforated plate is screwed onto the drain socket. structure is known.

[Problem that the invention aims to solve] However, the preventive devices equipped with wire mesh or multiple partition plates tend to attract dust, hair, etc. mixed in the drainage water, and the drainage pipes may become damaged during long-term use. clogged,
There was a problem that worsened the flow of wastewater. In particular, the rodent intrusion prevention device disclosed in Japanese Utility Model Application Publication No. 58-10986 has a structure in which a cylindrical object is fixed to the drain pipe with bolts, so it is not easy to attach or detach from the drain pipe, and it is difficult to secure it with bolts. If the device was not secured in place, rats would push the wire mesh and remove the device from the drain pipe, making it impossible to achieve its original purpose. In addition, with a structure in which the perforated plate is screwed onto the drain port, the drain port cannot be opened easily, and when a large amount of wastewater is flushed from a bucket or the like at once, the surrounding area becomes dirty, and the perforated plate is made of metal. The problem was that if the drain port became rusty, it would be difficult to remove it.

The purpose of this invention is to completely prevent rats from entering with a simple structure, to be easy to attach and detach from the drain, and to prevent foreign objects such as dust and hair from being moored in the drain. To provide a rodent intrusion prevention tool that hardly impairs the flow of drainage and can use an existing perforated plate.

[Means for Solving the Problems] The configuration of the present invention for achieving the above object will be explained based on FIG. 1 corresponding to an embodiment.

The present invention is based on a receiving metal fitting 1 for a drain opening that opens upward.
A rodent intrusion prevention device comprising a perforated plate 2 that can be placed in the perforated plate 2 and an introduction tube 4 that is attached to the back side of the perforated plate 2 and that can be introduced into the drain pipe connected to the receiving metal fitting 1. is characterized in that it has an outer diameter d that is slightly smaller than the inner diameter D of the drain pipe, and a length l that can accommodate at least the mouse R.

[Function] Even if the mouse R enters the introducing tube 4 and tries to push up the perforated plate 2, the rat's feet r push down the introduced tube 4, so the upward force of the mouse R pushing up the perforated plate 2 and its reaction force are generated. The downward force generated as a result of this is generated in the introduction tube 4, which is the same structural system, and both forces cancel each other out, and as a result, the perforated plate 2 connected to the introduction tube 4 cannot be pushed up. When flushing a large amount of wastewater at once, the perforated plate 2 can be easily removed from the receiving metal fitting 1 of the drain port by lifting the perforated plate 2 together with the introduction tube 4.

[Example] Next, an example of the present invention will be described in detail based on the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a receiving metal fitting for a drain opening opening above the bathroom. A perforated plate 2 of the same type as the conventional one is arranged in the stepped portion 1a of the receiving metal fitting 1. A drain pipe 3 is connected to the receiving metal fitting 1. In this example, the diameter of the perforated plate 2 is 60 mm, and the inner diameter D of the drain pipe 3 is 65 mm. An introduction tube 4 is vertically attached to the back surface 2a of the perforated plate 2. The introduction tube 4 has a length that can accommodate at least a mouse. In this example, the introduction tube 4 has an outer diameter d of 50 mm and a length l of 12 cm.
It is an aluminum tube, and four holes 4a are bored at equal intervals on the side of the upper end thereof. These holes 4a are filled with linear bodies 5 such as thin wires or synthetic fibers that do not corrode.
is inserted. This linear body 5 is the through hole 2b of the perforated plate 2.
It passes through and grows on the crosspiece 2c of the perforated plate 2. Thereby, the introduction tube 4 is attached to the back surface 2a of the perforated plate.

When the introduction tube 4 is placed on the receiving fitting 1, the introduction tube 4 is inserted into the drain pipe 3, as shown in FIG. When the mouse R passes through the drain pipe 3 and reaches the perforated plate 2 as in the conventional manner, the mouse R enters the introduction tube 4. Mouse R entering introduction tube 4
The forces generated are an upward force P and a downward force P ₁ ,
P ₂ and P ₃ , and the following equation holds within the introduction tube 4 which is the same structural system, and as a result, no external force acts on the perforated plate 2 to which the introduction tube 4 is attached. This makes it possible to prevent rats R from entering through the drain.

P=P ₁ +P ₂ +P ₃ ...Here, P is the force directly transmitted from the mouse to the eye plate, P ₁ ,
P ₂ and P ₃ are the respective frictional forces between the front legs, hind legs, and back and the introduction tube.

In the above example, the introduction tube is hung using a linear body as a means for attaching it to the introduction tube and the perforated plate, but the perforated plate may be integrally formed with the introduction tube attached from the beginning. The perforated plate and the introduction tube may be attached by screwing or by fitting the introduction tube into the perforated plate.

Moreover, each numerical value shown in the above example is an example, and the present invention is not limited thereto.

[Effects of the invention] As described above, according to the invention, intrusion of rats can be reliably prevented simply by attaching the introduction tube to the back of the perforated plate placed on the receiving metal fitting of the drain outlet. Further, since the perforated plate only increases the weight of the introduction tube, it can be easily pulled up with one hand like the conventional perforated plate.

Furthermore, since wire mesh is not used as in the past, even if foreign matter such as dust or hair is contained in the wastewater, there is little chance that these objects will become moored and impair the flow of the wastewater. When draining dirty water, the perforated plate can be easily removed as in the conventional method, which is an excellent advantage.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing the state of use of a rat intrusion prevention device according to an embodiment of the present invention. Figure 2 is its front view. Figure 3 is its plan view. 1... Drain socket fitting, 2... Perforated plate, 3...
Drain pipe, 4...Introduction tube.

Claims (1)

[Claims for Utility Model Registration] A perforated plate 2 that can be placed in a receiving fitting 1 of a drain opening opening upward, and a perforated plate 2 that can be installed inside the drain pipe that is attached to the back side of this perforated plate 2 and connected to the receiving fitting 1. The mouse intrusion prevention device is equipped with an introduction tube 4, wherein the introduction tube 4 has an outer diameter slightly smaller than the inner diameter of the drain pipe, and has a length that can accommodate at least a mouse R. Features a device to prevent rodent intrusion.