JP2001115475A - Stop cock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stop cock which can form a sure waterproof structure or a cut-off structure in an extremely easy manner to various kinds of pipes having an inner cylindrical surface, cope with the production of small lot, and easily constitute a waterproof structure making use of the inner cylindrical surface even when an inside flange part, etc., is formed. SOLUTION: The stop cock comprises a ring-shaped elastic sealing body 19 to be elastically abutted on an inner cylindrical surface of pipes, a pair of holding bodies 20 and 21 to hold the elastic sealing body from both sides, a holding wall part 22 which is provided on at least one of the holding bodies, and abutted on an inner circumferential part of the elastic sealing body to prevent the displacement inwardly in the radial direction, and a holding means 23 to bring a pair of holding bodies close to each other to hold the elastic sealing body, and an arch-shaped notched part 25 is provided on one end or both ends in one diameter direction in the pair of holding bodies.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a water stopcock. More specifically, the present invention relates to a water stopcock for sealing a conduit such as a manhole having a cylindrical inner surface.

[0002]

2. Description of the Related Art For example, manholes are provided for holding gas pipes, water and sewage pipes, etc. disposed underground. Generally, manholes are often formed of upright holes, and rainwater or the like easily penetrates through a gap between an opening and a lid member attached to the opening.

In order to solve the above problem, for example, as disclosed in Japanese Utility Model Registration No. 2507417, a seal member or the like is provided between a lid member and an opening to prevent infiltration of rainwater or the like. A way to do that has been proposed.

However, in a manhole opened on a road or the like, a vehicle such as an automobile passes over the lid member, so that not only a large load acts but also a vibration. For this reason, it is difficult to ensure the durability of the seal member.

In order to solve the above-mentioned problem, a waterproof cap for preventing water from entering may be provided separately from the lid member, as described in Japanese Utility Model Registration No. 2530653. By providing the waterproof cap, it is possible to prevent rainwater or the like from accumulating at the bottom of the manhole without being affected by the watertightness of the lid member.

[0006]

Generally, a cover receiving member made of cast iron or the like is provided at an opening of a manhole body formed by molding concrete. The lid member is detachably or removably mounted on the lid receiving member.

Although a reliable waterproof structure can be obtained by forming a waterproof structure on the lid receiving member itself, the cost of manufacturing the lid receiving member is often greatly increased due to the complicated structure. Also, it is very troublesome to ensure waterproof performance after maintenance.

Further, since the seal member of the waterproof structure is often formed of a rubber material, it must be mass-produced, and cannot be applied to a lid receiving member manufactured in a small lot. In addition, since manholes are often used for more than 10 years, if the number is small, it is difficult to continuously supply the sealing member. Further, it has been difficult to provide the above-described waterproof structure on a lid receiving member joined to a small-diameter manhole in a gas pipe or the like.

In order to solve the above problem, it is conceivable to provide a detachable waterproof structure separately from the structure of the lid receiving member. However, a general lid receiving member is often formed with an inner flange portion or a step portion that protrudes in a ring shape from the inner peripheral surface to support the lid member on the inner peripheral portion near the opening. For this reason, it was very difficult to form a reliable waterproof structure on the inner surface of the cylinder at the back of the lid receiving member because the flange portion and the like hindered.

According to the present invention, if a cylindrical inner surface is provided, a reliable waterproof structure or a waterproof structure can be formed extremely easily on various pipelines including manholes, and it is possible to cope with production of small lots. It is another object of the present invention to provide a water stopcock in which a waterproof structure can be easily formed by using the inner surface of the inner cylinder even if an inner flange portion or the like is formed near the opening of the lid receiving member. .

[0011]

Means for Solving the Problems To solve the above problems, the present invention takes the following technical means.

According to the first aspect of the present invention, there is provided a ring-shaped elastic sealing member elastically brought into contact with a cylindrical inner surface of a conduit, and a pair of clamping members for clamping the elastic sealing member from both sides. A body, a holding wall portion provided on at least one of the pressurizing members, abutting against an inner peripheral portion of the elastic sealing body to prevent displacement inward in the radial direction, and the pair of pressurizing members. Squeezing means for squeezing the elastic sealing body in close proximity to each other, wherein an arc-shaped notch is provided at one diametrical end or both ends of the pair of squeezing bodies. Be composed.

When the elastic sealing member is nipped by the nipping means, the elastic sealing member is elastically deformed and the outer dimension in the diameter direction increases. The water stopcock according to the present invention performs waterproofing or water stoppage by utilizing the elastic deformation of the elastic sealing body.

The material of the elastic sealing body is not particularly limited, and various materials can be used as long as they have a waterproof property. For example, a sponge-like rubber material containing closed cells can be employed. Also, the cross-sectional shape of the elastic sealing body is not particularly limited, and various cross-sections such as an elliptical cross-section as well as a circular cross-section can be adopted. Further, a groove, a ridge or the like for improving the waterproof performance may be provided.

[0015] The material and form of the pressure body are not particularly limited. For example, a clamping body formed in a disk shape can be adopted. Further, since the pressing body cooperates with the elastic sealing body to perform water stopping or the like, it is configured to be able to contact at least over the entire length of the elastic sealing body in the circumferential direction. Further, the outer diameter is set to be at least smaller than the diameter of the pipe so that the pipe can be inserted into the applicable pipe.

The holding wall portion is brought into contact with the inner peripheral portion of the elastic sealing body to support a reaction force from the inner surface of the cylinder, and prevents the elastic sealing body from being displaced inward in the radial direction. I do. The holding wall section only needs to be able to prevent the displacement of the elastic sealing body, and can be provided only on one of the pressing bodies or on both. Further, it is not necessary to form a continuous cylindrical outer surface along the inner surface of the elastic sealing body. For example, an intermittent holding wall portion along the inner peripheral surface of the elastic sealing body may be provided.

Various configurations can be adopted as the pinching means. For example, as in the invention described in claim 4, while one end is joined to one pressure plate, the other end is extended from the insertion hole of the other pressure plate, the screw shaft portion, And a nut member screwed to the screw shaft portion.

By tightening the nut member,
The pair of pressure members are brought close to each other, the elastic sealing member is elastically deformed and expands radially outward, and is elastically brought into contact with the inner peripheral surface of the conduit to perform water stoppage. .

When the pinching means is constructed as described above, the nut member may be detached from the screw shaft. For this reason, it is preferable to provide a detachment preventing member for preventing the nut member from detaching from the screw shaft portion. As the detachment prevention member, for example, a washer or the like larger than the screw hole of the nut member can be provided at the tip of the screw shaft portion.

According to the present invention, a notch is provided in which one end or both ends in one diametrical direction of the pair of pressure members is cut out in an arc shape. By providing the notch, a portion having a small diameter dimension is formed in the pressing body. For this reason, by utilizing the deformation of the elastic sealing body, it is possible to insert the pressing body into a conduit having a diameter smaller than the maximum outer diameter of the pressing body. On the other hand, since the outer dimensions of the elastic sealing body do not change, the diameter dimension can be increased by pressing the elastic sealing body, and a reliable water stopping effect can be obtained.

The cutout may be provided only at one end in the diameter direction or may be provided at both ends, depending on the shape of the conduit. By providing at both ends, it is possible to further reduce the diameter that can pass.

According to the above configuration, it is possible to form a waterproof structure at the back of a pipe in which an inner flange portion or the like projecting in a ring shape is formed on an inner peripheral portion. Further, the present invention can be applied to a case where there is a step on the inner surface of the cylinder.

According to the invention described in claim 2 of the present application, the holding wall notch is formed by notching a portion of the holding wall corresponding to the notch, and the holding wall notch is provided with a non-pressed state. At the same time, the elastic sealing body is allowed to displace inward in the radial direction, while the elastic sealing body is brought into close proximity to the inner peripheral portion of the elastic sealing body in a state of being pressed. And a support means for preventing the elastic sealing body from being displaced inward in the radial direction.

If the notch is formed only in the pressing body,
The inner diameter that can pass through is merely reduced by the elastically deformable range of the elastic sealing body. Further, when the notch is provided in the clamping body, the clamping force may not act sufficiently. The invention described in the present claim is configured so that the displacement amount of the elastic sealing body is further expanded, and can be applied to a case where there is a large step and the like, and a reliable water stopping effect can be exhibited. .

By providing the cut-out portion of the retaining wall, the displacement of the elastic sealing body in the radially inward direction in the non-clamping state can be increased. For this reason, the inside diameter of the pipe that can be passed can be further reduced, and the water stopcock can be easily introduced into the pipe. Therefore, even if there is a projecting portion or the like in the opening of the conduit or in the middle, it is possible to stop water in various conduits.

On the other hand, if the holding wall portion in the cutout portion disappears, the pressing force against the inner peripheral surface of the conduit decreases, and there is a possibility that the sealing performance and the like may decrease. In the present invention, in order to avoid the above-mentioned inconvenience, the holding wall notch portion allows the elastic sealing body to be displaced inward in the radial direction in the non-pressing state, while bringing the pressing member into close proximity. In a state where the elastic sealing body is pressed, a supporting means is provided for contacting the inner peripheral portion of the elastic sealing body to prevent the elastic sealing body from being displaced inward in the radial direction.

The support means contacts the inner peripheral portion of the elastic sealing body to prevent the elastic sealing body from displacing inward in the radial direction when the elastic sealing body is pressed. It is configured. For this reason, even if the above-mentioned holding wall cutout portion is provided, the water stopping performance does not decrease. Further, in order to prevent a decrease in the pressing force due to the formation of the notch, the inner peripheral portion of the elastic sealing body is displaced radially outward from the holding wall to generate a large pressing force. You may comprise.

According to the third aspect of the present invention, the supporting means includes a spring member which is arranged in a diametrical direction inside the pair of pressing members and is curved in an arc shape.
A pressing member joined to an end of the spring member and brought into contact with an inner peripheral portion of the elastic sealing member. The body may be displaced radially outward to press and support the inner peripheral portion of the elastic sealing body.

The spring member is deformed in a direction in which the curvature increases when the spring member passes through a conduit having a diameter smaller than the maximum outer diameter of the water stopcock in the non-pressurizing state, so that the elastic member has a radial direction. What is necessary is just to comprise so that displacement to an inside may be permitted, and a spring member of various forms, such as a plate shape and a rod shape, can be employ | adopted.

On the other hand, when the spring member is deformed in a direction in which its curvature decreases, the pressing body is displaced radially outward to abut against the inner surface of the elastic sealing body, and Prevents radial inward displacement. The deformation of the spring member may be performed via the pressing body, or may be performed using other means.

For example, a state in which the center of the bow-shaped spring member is brought into contact with the inner surface of one of the pressing members, while the pressing members joined to both ends of the spring member are brought into contact with the other pressing member. Then, when the pressing body is brought closer, the curvature of the spring member decreases, the longitudinal dimension of the spring member increases, and the elastic sealing body can be pressed radially outward. Conversely, when the pressing body is separated, the pressing body is displaced radially inward due to the elastic force of the spring member, and the elastic sealing body is allowed to be displaced radially inward.

The provision of the support means increases the radially inwardly displaceable dimension of the elastic sealing body in the cutout portion, so that a portion having an opening smaller than the diameter of the elastic sealing body can be easily formed. The waterproof function can be exhibited at a desired position by passing through.

The material constituting the spring member is not particularly limited, and not only a metal plate spring but also a resin plate spring can be employed. Further, the cross-sectional shape is not limited to a thin plate shape, and a rod-shaped member can be adopted.

The overall shape of the spring member is not particularly limited as long as it can support a pressing body joined to both ends.

Further, the water stopcock according to the present invention can be applied to various pipelines. For example, the present invention is not limited to a vertical hole such as a manhole, and can be applied to various pipes arranged in a lateral direction. Further, the purpose is not limited to the infiltration of rainwater or the like, and can be used for temporarily stopping water in a sewer pipe or the like.

[0036]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 shows an entire cross section of a manhole to which the water stopcock according to the present invention is applied. The manhole shown in this figure is a manhole 1 for gas piping, and is provided with two large holes 2 and 3 having a large diameter and a small diameter. This manhole 1
Is a main body 4 formed by molding concrete, lid receiving members 5 and 6 joined to the upper end of the upright hole 2.3, and a lid openably and closably mounted on the lid receiving members 5 and 6. Members 7, 8
And is provided.

At the bottom of the manhole 1, a gas pipe 9 for performing maintenance or the like is provided so as to be exposed, and a closing valve 10 for stopping the flow of gas is provided at an exposed portion of the gas pipe 9. Further, release valves 11 and 12 are joined to both side pipes of the closing valve 10.
The gas in one or both of the pipe regions partitioned by closing the closing valve 10 is extracted through the release valves 11 and 12 and the small-diameter-side standing hole 2 so that pipe work in each of the piping regions can be performed. Is performed.

In the present embodiment, a case will be described in which the water stopcock 13 according to the present invention is mounted on the inner side of the lid receiving member 5 joined to the small-diameter upright hole 2. The large-diameter side lid receiving member 6
Can be provided with a water stopcock similar to the present invention,
Other types of waterproof structures may be provided.

FIG. 2 is an enlarged view of the upper part of the upright hole 2. The lid receiving member 5 has an outer flange portion 14 joined to an upper end portion of the upright hole 2, an inner flange portion 15 supporting the lid member 7, and an enlarged inner diameter below the inner flange portion 15. It has a substantially cylindrical shape with the formed step 16. In the embodiment, the inner flange portion 15 and the step portion 16 are provided in order to explain the operation and effect of the present invention. However, one or both of the inner flange portion 15 and the step portion 16 are not formed. It can also be applied to a waterproof structure.

Since the lid receiving member 5 is provided not only with the inner flange portion 15 but also with the stepped portion 16, an inexpensive and reliable waterproof is provided behind such a lid receiving member 5. It was difficult to provide a structure.

As shown in FIGS. 2 and 3, the water stopcock 13 according to the present embodiment is a ring-shaped elastic sealing member which is elastically brought into contact with a cylindrical inner surface 18 below the lid receiving member 5. A stopper 19, a pair of upper and lower generally disk-shaped pressing members 20, 21 for pressing the elastic sealing member 19 from both sides, and an inner peripheral portion of the elastic sealing member 19 provided on the lower pressing member 21. Wall portion 22 which is brought into contact with the holding member and prevents displacement inward in the radial direction.
And a pressing means 23 for pressing the elastic sealing body 19 by bringing the pair of pressing bodies 20 and 21 close to each other.

The elastic sealing body 19 according to the present embodiment
Is formed in a ring shape by cutting a long sponge rubber member having a circular cross section into a length corresponding to the inner periphery of the lid receiving member 5 and joining the cut ends.

As shown in FIG. 9, the elastic sealing member 19 is elastically deformed from a circular shape to a substantially elliptical shape when pressed by the upper and lower pressing members 20 and 21, and has a diametrical dimension. Is increased so as to elastically contact the inner peripheral surface of the lid receiving member 5.

Each of the upper and lower pressing members 20 and 21 has a disk-like shape made of a stainless steel plate, and a U-shaped handle portion 24 is formed on the pressing plate 20 disposed above. ing.

As shown in FIG. 4, the upper and lower pressing members 20, 2
At both ends of one diameter, arcuate cutouts 25, 25 are formed. The notch amount of the notch portions 25, 25 is
As shown in FIG. 6, the inner flange portion 1 of the lid receiving member 5
5 is set. In addition, the center of the edge of each of the cutouts 25 is at least abutted against the elastic sealing member 19 in a pressing state so that the elastic sealing member 19 can be effectively pressed from above and below. .

The lower pressing body 21 is formed in the same contour as the upper pressing body 20, and the inner sealing surface prevents the elastic sealing body 19 from being displaced radially inward. The holding wall portion 22 is formed. As shown in FIG. 5, the holding wall portion 22 is formed along the inner diameter of the elastic sealing body 19, and is provided with a support means 29 described later. It is formed in a pair of arcuate shapes cut out in width. In the embodiment, the wall 2 connects both ends of the holding walls 22 and 22.
Although the closed holding wall portion is formed by providing the closed walls 6, 26, the same effect can be exerted without providing the wall portions 26, 26.

As shown in FIG. 3, the pinching means 23
A pair of screw shafts 27, 27 that are welded along one diameter of the lower pressing body 21 and extend from the insertion hole of the upper pressing member 20, and are screwed to the screw shaft 27. And thumb screws 28, 28 to be made. As shown in FIG. 9, by tightening the thumb screw 28,
The pressing means 23 is configured so that the elastic sealing body 19 can be pressed by bringing the pair of pressing bodies 20 and 21 close to each other.

The support means 29 comprises the wall portions 26, 26
A spring member 30 arranged in a diametrical direction and curved in an arc shape is provided in a gap between the spring member 30 and joined to both ends of the spring member 30 so as to contact an inner peripheral portion of the elastic sealing body 19. And a pressing body 31, 31 to be provided.

When the pair of clamping members 20 and 21 are brought close to each other, the spring member 30 is elastically deformed in the direction of decreasing the curvature via the pressing members 31 and 31, and
The pressing bodies 31, 31 are displaced radially outward. As a result, the pressing members 31, 31 are not
The inner and outer peripheral portions of the elastic sealing bodies 19 at the positions 5 and 25 are brought into contact with each other to prevent displacement inward in the radial direction.

In the present embodiment, the spring member 30 is formed by forming a strip-shaped stainless steel spring steel plate into an arc shape. The pressing members 31, 31 are formed of stainless steel having a cylindrical outer surface similar to the holding wall portion 22,
These are joined to both ends of the spring member 30 by welding.

As shown in FIG. 5, the spring member 30 has an elongated hole 3 through which the screw shaft portions 27 are inserted.
5, 35 are formed and a locking hole 33 for positioning is formed in the center. The spring member 30 and the pressing body 31 are positioned by locking the locking hole 33 to the protrusion 34 provided on the lower pressure body 21.

The pressing members 31, 31 in the non-clamping state
As shown in FIG. 8, the dimension between the outer surfaces is set to such an extent that the elastic sealing body 19 comes into contact with the inner peripheral portion. Also,
As shown in FIGS. 6 and 7, by pressing the pressing members 31, 31 inward in the radial direction, the spring member 30 can be deformed, and the size can be further reduced.

As shown in FIG. 6, the notches 25, 25
When the water stopper 13 is inserted into the lid receiving member along a plane including the axis of the lid receiving member 5 so as to face the inner flange 15, as shown in FIG. 19 and the pressing bodies 31, 31 are deformed and displaced radially inward. This allows the water stopcock 13 to easily enter the inner side of the lid receiving member 5 through the inner flange portion 15.

Since the pressing members 31, 31 can be displaced radially inward in the non-clamping state, the elastic sealing member 19 can be displaced radially inward when passing through the inner flange portion 15. The range is greatly expanded. For this reason, as shown in FIG. 6, even when the stepped portion 16 is formed on the inner peripheral surface and the difference in diameter between the entrance and the portion forming the waterproof structure is large, the water stopcock 13 can easily enter. It becomes possible to attach it. Therefore, work efficiency can be improved, and a reliable waterproof structure can be configured.

As shown in FIG. 8, the water stopcock 13 which has entered the inner portion of the lid receiving member 5 is rotated in a horizontal direction along a plane perpendicular to the axis of the lid receiving member 5, as shown in FIG. The wing nut 28 is tightened. Thereby, the pinching member 2
0, 21 are brought close to each other, and
Is deformed so as to bulge outward in the radial direction, and the elastic sealing body 19 is elastically brought into contact with the inner peripheral surface of the lid receiving member 5.

On the other hand, the holding wall portion 22 prevents the elastic sealing body from being displaced inward in the radial direction. In addition, the pressing members 31, 31 are displaced radially outward, so that the notch 2
This prevents the elastic sealing body 19 from being deformed or displaced inward in the radial direction at 5 and 25. Thereby, the elastic sealing body 19 can be reliably brought into contact with the inner surface of the lid receiving member 5, and a highly reliable waterproof structure can be configured.

To remove the water stopcock 13, the wing nut 28 may be loosened to separate the upper and lower pressing bodies 20, 21. There is a risk that the stopcock 13 will fall into the manhole. In the present embodiment, a screw hole 36 is formed in the end surface of the screw shaft portion 27, and a washer 38 having a diameter larger than the diameter of the screw shaft portion 27 is fixed by a set screw 37. Thus, it is possible to prevent the wing nut 28 from coming off the screw shaft 27, and it is possible to enhance the safety and reliability of the work.

This embodiment is not limited to the above embodiment. In the embodiment, the present invention is applied to the vertical hole for degassing, but the present invention can also be applied to a manhole provided with water and sewage, electric piping, and the like.

Further, in the embodiment, the present invention is applied to a waterproof structure having a vertical hole, but may be applied to a pipeline constituted by a horizontal hole.

Further, in the embodiment, both ends of one of the upper and lower pressing bodies in the diametric direction are cut out in an arc shape, but a cutout may be provided only at one end.

The shape of the holding wall is not limited to the embodiment, but may be a curved surface corresponding to the cross-sectional shape of the elastic sealing body.

In the embodiment, the pressing means is formed by two sets of screw shafts and nut members. However, the number of pressing means is not limited, and one set or three or more sets of screw means may be used. It can also be constituted by a shaft portion and a nut member.

[Brief description of the drawings]

FIG. 1 is a sectional view showing the overall shape of a manhole.

FIG. 2 is a sectional view showing a main part of the manhole shown in FIG.

FIG. 3 is an exploded view of the water stopcock according to the present invention.

FIG. 4 is a plan view of the water stopcock shown in FIG. 4;

FIG. 5 is a plan view along the line VV in FIG. 3;

FIG. 6 is a sectional view showing a state of being inserted into a lid receiving member.

FIG. 7 is a sectional view taken along line VII-VII in FIG. 6;

FIG. 8 is a sectional view of the water stopcock in the non-clamping state at the mounting position.

9 is a cross-sectional view of a state where the water stoppage function of the water stopcock in FIG. 8 is exerted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipeline (manhole) 13 Water stopcock 18 Cylindrical inner surface 19 Elastic sealing body 20 Clamping body 21 Clamping body 22 Holding wall part 23 Clamping means 25 Notch

Claims (4)

[Claims] 1. A ring-shaped elastic sealing member elastically brought into contact with a cylindrical inner surface of a pipe, a pair of pressing members for pressing the elastic sealing member from both sides, and at least one of the pressing members A holding wall portion provided on one side and in contact with an inner peripheral portion of the elastic sealing body to prevent displacement inward in the radial direction; and A water stopcock provided with a pressure pressing means for pressing the pressure stop, wherein the one end or both ends in one diameter direction of the pair of pressure holding members is provided with an arcuate cutout. 2. A notch portion corresponding to the notch portion in the holding wall portion is cut to form a holding wall notch portion, and the holding wall notch portion has a radial direction of the elastic sealing body in a non-clamping state. While permitting inward displacement, in the pressure state of the elastic sealing body in which the pressing body is brought close, the elastic sealing body contacts the inner peripheral portion of the elastic sealing body in the radial direction of the elastic sealing body. The water stopcock according to claim 1, further comprising a support means for preventing inward displacement. 3. The spring means is arranged in a diametrical direction inside the pair of pressure members and curved in an arc shape, and is connected to an end of the spring member so that the elastic sealing member is provided. A pressing member that is brought into contact with an inner peripheral portion of the stop body, wherein the spring member is elastically deformed by the proximity operation of the pair of pressing members to displace the pressing member diametrically outward, and the elastic sealing is performed. It was configured to press and support the inner periphery of the stop,
The stopcock according to claim 2. 4. A screw shaft part having one end joined to one pressure plate and the other end extending from a through hole of the other pressure plate, and And a nut member screwed to the portion, wherein a detachment preventing member for preventing detachment of the nut member from the screw shaft portion is provided at a distal end portion of the screw shaft portion. Item 4. The water stopcock according to any one of Items 3.