JP3058923U - Water stop device in lid receiving part - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to more effectively block intrusion of moisture into a lid receiving portion such as a manhole. A sealing means is provided between a lid body 11 and a frame body 13 to prevent moisture from entering the opening. A circumferential groove 16 is provided on one or both of the inner peripheral surface 14 of the frame 13 and the outer peripheral surface 12 of the lid 11 in order to block moisture passing through the sealing means.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a water stopping device for a lid receiving portion such as a manhole, which has a lid covering an opening and a frame supporting the lid.

[0002]

[Prior art]

 For example, in the case of a slope receiving type, the iron cover of a manhole receives the reversely inclined surface of the outer peripheral surface of the iron cover in a forwardly inclined surface on the inner peripheral surface of the receiving frame in a state of surface contact to prevent moisture from entering. However, there is a gap between the surface contact portions that causes a capillary phenomenon, and a small amount of water enters. Therefore, it is inevitable that a considerable amount of water enters inside after a certain period of time.

On the other hand, in the case of a lid receiving portion with a packing interposed therebetween, although the water stopping effect is perfect, the packing must be sufficiently pressurized in order to exhibit the complete water stopping effect. Therefore, there is a problem that opening and closing of the lid is not easy.

[0004]

[Problems to be solved by the invention]

 The present invention has been made in view of the above points, and the problem is that the water stopping effect can be further improved in the case of the slope receiving type, and the pressing force is smaller than in the conventional case in the case of the packing type. Accordingly, it is an object of the present invention to provide a water stopping device which can obtain a complete water stopping effect and can more effectively block the invasion of moisture as a whole.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, the present invention includes a sealing means between the lid body and the frame body for moisture entering into the opening, and shuts off moisture passing through the sealing means. For this purpose, means for providing a groove in the circumferential direction on one or both of the outer peripheral surface of the lid and the inner peripheral surface of the frame body is adopted.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The water stopping device in a lid receiving portion according to the present invention is provided between a lid that covers an opening such as a manhole and a frame that receives the lid.

[0007] There are various types of sealing means for moisture and the like between the lid and the frame supporting the lid. In the case of the present invention, the outer peripheral surface of the reversely inclined lid is provided on the peripheral surface of the forwardly inclined frame. The so-called gradient receiving type, which can be closely fitted, and the type in which packing is interposed are applicable. The packing is included in the elastic seal member described in claim 3. The tightly fitting gradient receiving structure and the sealing structure by packing constitute sealing means for moisture that tends to enter the opening.

[0008] The gradient receiving structure is machined to increase the accuracy of the outer peripheral surface of the lid and the inner peripheral surface of the frame. In this case, a gap is generated slightly due to the positional relationship not being as shown in the design drawing, a shift, and the like, so that moisture can enter due to a capillary phenomenon.

In the case of a sealing structure by packing, a perfect sealing effect can be obtained under conditions involving difficulties that require special efforts to open and close the lid, but the pressure and compression of the packing are insufficient. In such a case, a sufficient sealing effect cannot be obtained. If the compression of the packing is weaker than before, the effort involved in opening and closing the lid may be less. However, in this case, if the sealing effect is insufficient, moisture can pass through the sealing structure formed by packing.

In any of the above structures, in order to block moisture passing through the sealing means, a circumferential groove is formed on either the outer peripheral surface of the lid or the inner peripheral surface of the frame. Or, it is provided on both sides. In the case of the slope receiving structure, the outer peripheral surface of the lid or the inner peripheral surface of the frame that fits closely is the target surface on which the concave groove is provided. In the case of the sealing structure by packing, a concave groove is provided on the inner peripheral surface of the frame or the outer peripheral surface of the lid that comes into contact with the packing. This is because the packing can be attached to the lid or the frame, so the groove cannot be determined only on the frame side.

One or more circumferential grooves are provided. In the case of a plurality of grooves, the grooves are provided at intervals, and the grooves are provided so as to be substantially parallel to each other.

[0012]

【Example】

 This will be described in more detail with reference to the drawings. 1 to 4 show a first embodiment of a manhole iron cover of a slope receiving type and a receiving frame thereof, wherein an outer peripheral surface 12 of a lid 11 is a reverse inclined surface, and an inner peripheral surface 14 of a frame 13 is a forward inclined surface. It has become. The outer peripheral surface 12 of the lid 11 and the inner peripheral surface 14 of the frame 13 are both finished by machining and are tightly fitted as one of the sealing means. A gap 15 which causes a capillary phenomenon can be formed between the gap 15 and the gap 14. See FIG. 3 and FIG.

Accordingly, in the embodiment, a plurality of circumferential grooves 16 are formed in the outer peripheral surface 12 of the lid 11 to stop the progress of the capillary phenomenon and block moisture. Therefore, the concave groove 16 provides an air reservoir 17 consisting of a space that is somewhat larger than the gap 15 at the position.

The shape of the groove 16 for temporarily stopping the progress of the capillary action is not limited to the horizontal V-shape shown in the figure, and may be circular or square. Needs to be of a size and shape that can be used.

[0015] In the case of a manhole iron cover, it must be of a size and shape that is not filled with paint because it is painted. In the embodiment, a V-shaped concave groove 16 having sides of about 1.5 mm, 3 mm, and 6 mm was obtained, and good results were obtained. Note that the V-shaped cross section can be obtained by using a threaded cutting tool that forms a male screw, so that the implementation is easy.

In the first embodiment as well, moisture penetrates into the gap 15 from above and travels downward by capillary action, but water stops there because the capillary is interrupted at the concave groove 16. In addition, if there is water pressure or the inside of the manhole is at a lower pressure than the outside, the penetration of moisture may continue. In this case, the water that travels through the capillary first fills the air pool 17 formed by the groove 16. If the air pool 17 is buried with moisture, it will be difficult to move downward due to surface tension. Therefore, it is difficult to move moisture downward unless there is enough water and water. Since the above operation is performed for each of the grooves 16, the watertightness of the sealing means can be improved.

FIGS. 5 and 6 show a second embodiment of the present invention. The sealing means in the second embodiment is a packing 18 as an elastic sealing member. The exemplified packing 18 is a ring-shaped one fixed to a holding groove 19 formed on the outer peripheral surface 12 of the lid 11. Therefore, the mating surface 20 with which the packing 18 comes into contact becomes the inner peripheral surface 14 of the frame 13, and a plurality of concave grooves 16 are formed in the mating surface 20.

The mating surface 20 is slightly inclined in the reverse direction, so that even if the pressing force on the packing 18 according to the present invention is less than the excessive pressing force on the conventional packing, it is not easily pulled out. ing. Although the packing 18 of the second embodiment is smaller than the conventional one, the packing 18 alone receives a pressing force for obtaining a sufficiently close sealing effect. The stopping effect is complete. Thus, opening and closing of the lid 11 becomes easier than before.

[0019]

[Effect of the invention]

 Since the present invention is constructed and operates as described above, the water stopping effect can be remarkably improved in the case of the slope receiving type as compared with the conventional case, and in the case of the sealing structure by packing, as compared with the conventional case. It is possible to obtain a complete water stopping effect with a small pressing force, and it is possible to effectively shut off water more effectively.

[Brief description of the drawings]

FIG. 1A is a plan view of a frame showing a first embodiment of a water stopping device in a lid receiving portion according to the present invention. (B) The top view of a lid similarly.

FIG. 2 is a sectional view showing a combined state of a lid and a frame.

FIG. 3 is an enlarged sectional view of a lid receiving portion.

FIG. 4 is a cross-sectional view for explaining the operation of the above.

FIG. 5 is a cross-sectional view showing a second embodiment of the water stopping device according to the present invention, in which a combination state of a lid and a frame is partially omitted.

FIG. 6 is an enlarged sectional view of a lid receiving portion.

Claims (4)

[Utility model registration claims] In a lid receiving portion such as a manhole having a lid for covering an opening and a frame for receiving the lid, a space between the lid and the frame against moisture that tends to enter the opening. A sealing means is provided, and a circumferential groove is provided on one or both of the outer peripheral surface of the lid and the inner peripheral surface of the frame body to block moisture that passes through the sealing means. The water stopping device in the lid receiving portion. 2. The lid receiving part according to claim 1, wherein the sealing means is constituted by an outer peripheral surface of the lid and an inner peripheral surface of the frame, which can be tightly fitted with a gap causing a capillary phenomenon. Water stop device. 3. The sealing means has an elastic seal member fixed to the lid or the frame, and a concave groove is provided on the inner peripheral surface of the frame or the outer peripheral surface of the lid in contact with the elastic seal member. The water stopping device in the lid receiving portion according to claim 1, wherein 4. The water stopping device according to claim 1, wherein a plurality of circumferential grooves are provided substantially in parallel at intervals.