JP6235898B2 - Piping hole closing structure - Google Patents

Description

  The present invention relates to a pipe hole closing structure for closing a hole in an existing pipe.

  As this type of piping hole closing structure, for example, as shown in FIG. 4, a pair of fastening metal fittings 102 provided so as to be swingable via a hinge portion 101, and provided inside the fastening metal fittings 102. A thing provided with the rubber plate 103 for water stop and the volt | bolt 104 which clamps each fastening metal fitting 102 in the direction which adjoins is known. Each fastening fitting 102 is composed of a material having a high bending rigidity that is curved so as to follow the outer peripheral surface of a pipe (not shown) having a predetermined diameter. The bolt 104 is configured to press the rubber plate 103 against the pipe by tightening the fastening fittings 102 in directions close to each other.

  In the piping hole closing structure configured as described above, since the fastening bracket 102 has high bending rigidity, the rubber plate 103 can be pressed against the piping with a large force. For this reason, even when the pressure in piping is high, there exists an advantage that liquid, such as water in the said piping, can prevent reliably leaking from a hole.

  However, in the conventional pipe hole closing structure, since the fastening bracket 102 has high bending rigidity, it can be fitted to the outer peripheral surface of the pipe unless the fastening bracket 102 is configured to be swingable by the hinge portion 101. Therefore, there is a problem that the structure is complicated and the cost is increased. In addition, since it can be applied only to a pipe having a diameter that substantially matches the curved shape of the fastening fitting 102, it has a problem of poor versatility.

  The present invention has been made in view of the above circumstances, and has a highly versatile pipe hole closing structure that can simplify the structure and reduce the cost and can be applied to pipes of different diameters. The issue is to provide.

  In order to solve the above problems, the invention according to claim 1 is a pipe hole closing structure for closing a hole in an existing pipe, and includes a tightening band, an inner elastic plate, and a hole closing elastic plate. And a fastening means, wherein the fastening band is curved in a direction along the outer peripheral surface of the pipe by a strip-shaped metal plate having a width covering the hole, and is elastically deformed and / or plastic. The inner elastic plate is formed to be attached to the outer peripheral surface of the pipe by opening and closing the distance between both ends in the bending direction by deformation, and the inner elastic plate has a band-like rubber elasticity covering the hole. The hole-sealing elastic plate is formed by a rubber-elastic plate having a larger extent than the hole, and is provided along the inner peripheral surface of the fastening band. The inner surface of the inner elastic plate The tightening means presses the hole closing elastic plate around the hole in the pipe by applying a tightening force in the diameter reducing direction to the tightening band. It is characterized by being.

  According to a second aspect of the present invention, in the first aspect of the invention, the fastening band has a first flange protruding outward from the outer peripheral surface at one end portion in the bending direction, and the bending direction. A second flange projecting outward from the outer peripheral surface so as to face the first flange at a position close to the other end portion in a state where the other end portion is inserted along the inner peripheral surface of the one end portion. And the tightening means includes a bolt inserted into a through hole formed in each of the first and second flanges, and a nut screwed into the bolt. .

  According to a third aspect of the invention, in the first or second aspect of the invention, the inner elastic plate is bonded to at least one portion of the inner circumferential surface of the fastening band in the bending direction. It is said.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the hole closing elastic plate is bonded with a double-sided tape having a release paper on a surface that contacts the outer peripheral surface of the pipe. It is characterized by that.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the fastening band is made of stainless steel, and the inner elastic plate and the hole closing elastic plate are made of rubber plates. It is characterized by being formed.

  According to the first aspect of the present invention, the fastening band, the inner elastic plate, the hole closing elastic plate, and the fastening means are provided, and the fastening band is curvedly formed by the belt-shaped metal plate. It is formed by elastic deformation and / or plastic deformation so as to be attached to the outer peripheral surface of the pipe by opening and closing the distance between both ends in the bending direction, and the inner elastic plate is formed by a plate having rubber elasticity The hole-sealing elastic plate is formed by a rubber-elastic plate having a larger extent than the hole of the pipe, and is provided on the inner surface of the inner elastic plate. The tightening means is configured to press the elastic plate for hole closing around the hole in the pipe by applying a tightening force in the diameter reducing direction to the tightening band. Piping without using the hinge part Attached to the outer periphery, liquid such as water can be prevented from leaking from the hole. Moreover, since the fastening band is made of a material having low bending rigidity, it can be attached to pipes having different diameters.

  Accordingly, the structure is simplified, the cost can be reduced, and the versatility can be improved.

  In addition, the fastening band has low bending rigidity capable of elastic deformation, etc., but the inner elastic plate and the hole closing elastic plate are attached to the outer peripheral surface of the pipe by the action of tension generated in the fastening band when the diameter is reduced. Can be pressed strongly. In this case, since the hole closing elastic plate is provided on the inner surface of the inner elastic plate, a portion having a high surface pressure where only the hole closing elastic plate hits is formed around the hole in the pipe.

  Therefore, for example, even when a relatively large hole for inserting a cleaning jig is formed in the sewage pipe, it is possible to reliably prevent drainage or the like from leaking to the outside from the hole. Moreover, since the inner elastic plate is provided along the inner peripheral surface of the metal fastening band, even if the pipe is made of plastic such as polyvinyl chloride, the pipe is damaged by the fastening band. Damage can be prevented from occurring.

  According to the second aspect of the present invention, the fastening band has the first flange protruding outward from the outer peripheral surface at one end portion in the bending direction, and the outer periphery at a position near the other end portion in the bending direction. The fastening means has a second flange protruding outward from the surface, and the fastening means includes a bolt inserted into a through hole formed in each of the first and second flanges, and a nut screwed into the bolt. Therefore, by tightening the bolts and nuts so that the first and second flanges are close to each other, tension in the diameter reducing direction is generated in the tightening band, and the hole closing elastic plate is attached to the outer peripheral surface of the pipe. Can be strongly pressed against.

  That is, although the tightening band has a small bending rigidity, the hole closing elastic plate is formed by the tightening force generating device having a very simple structure including the first and second flanges, the bolt and the nut. It can be pressed against the pipe with a large pressure, and liquid such as water can be reliably prevented from leaking from the hole.

  According to the third aspect of the invention, the inner elastic plate only needs to be bonded to at least one portion in the bending direction on the inner peripheral surface of the tightening band. The number of man-hours required can be reduced. In this case, it is possible to insert the other end of the tightening band between the one end and the inner elastic plate by avoiding adhesion between the inner peripheral surface of the one end of the tightening band and the inner elastic plate. it can. Therefore, it is possible to prevent the pipe from being damaged by the other end of the fastening band. In addition, when the bonding portion between the fastening band and the inner elastic plate is limited to one portion (that is, one location), the relative relationship between the tightening band and the inner elastic plate when the fastening band is bent and deformed. Since displacement is possible, there is an advantage that the degree of freedom of bending deformation of the fastening band can be improved.

  According to invention of Claim 4, since the double-sided tape which has release paper is adhere | attached on the surface which hits the outer peripheral surface of piping, the elastic plate for hole closing is peeled off by peeling the said release paper. Can be temporarily fixed to the pipe. Therefore, after the hole closing elastic plate is temporarily fixed to the pipe so as to cover the hole, a fastening band or the like can be attached to the pipe, so that the work of closing the hole can be simplified.

  According to the fifth aspect of the present invention, the fastening band is made of stainless steel, and the inner elastic plate and the hole closing elastic plate are made of rubber plates. The durability of the elastic plate can be improved. Therefore, for example, after making a hole in a pipe and cleaning the inside of the pipe, until the next pipe cleaning is performed, for example, at intervals of 1 to 2 years using the hole, sufficient leakage of liquid such as drainage Can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows piping after mounting | wearing with the piping hole closing structure shown as one Example of this invention, Comprising: (a) shows the state which mounted | wore with each piping of the vertical direction and the horizontal direction. It is explanatory drawing, (b) is an arrow view from the B direction in (a), (c) is an arrow view from the C direction in (a). It is a figure which shows the same piping hole closing structure, Comprising: (a) is a perspective view which shows the fastening band which has an inner side rubber plate, (b) is a front view which shows the rubber plate for hole closing. It is sectional drawing which shows the same piping hole closing structure. It is the piping hole closing structure shown as a prior art example, Comprising: (a) is a perspective view, (b) is a front view, (c) is a right view.

  The form for implementing this invention is demonstrated in detail based on one Example.

  As shown in FIG. 1, the pipe hole closing structure 1 shown in this embodiment has a drainage pipe (sewage pipe) P installed in a building such as a reinforced concrete structure in order to close the hole P1. It is designed to be attached to the tube P. The hole P1 is formed to insert a jig for cleaning the drain pipe P.

  In addition, although the hole for a cleaning is normally installed in the predetermined position of a drain pipe as what has a lid | cover which can be opened and closed, when such a hole is not installed, it is cleaned in the drain pipe P. A relatively large circular hole P1 into which a jig for use is inserted is opened, and the hole P1 is closed with the piping hole closing structure 1 after cleaning.

  As shown in FIGS. 2 and 3, the piping hole closing structure 1 includes a fastening band 2, an inner rubber plate (inner elastic plate) 3, a hole closing rubber plate (hole closing elastic plate) 4, A bolt 5 and a nut 6 are provided as tightening means.

  The fastening band 2 is formed of a band-shaped stainless steel plate (metal plate) that covers the hole P1, and is curved in a direction along the circumferential direction of the outer peripheral surface of the drain pipe P having a circular cross section. At the same time, it is formed so as to be attached to the outer peripheral surface of the drain pipe P by opening and closing the distance between the two end portions 2a, 2b in the bending direction by elastic deformation and / or plastic deformation.

  The inner rubber plate 3 is formed by a band-shaped rubber plate (a plate having rubber elasticity) that covers the hole P1, and is provided in a curved state along the inner peripheral surface of the fastening band 2. . On the other hand, the hole closing rubber plate 4 is formed by a substantially square rubber plate (a plate having rubber elasticity) having a larger extent than the hole P1, and is curved along the inner surface of the inner rubber plate 3. It is to be provided in. For example, nitrile rubber (NBR) is used as the rubber material of the inner rubber plate 3 and the hole closing rubber plate 4.

  The bolt 5 and the nut 6 are configured to press the hole closing rubber plate 4 around the hole P1 in the drain pipe P by applying a tightening force in the diameter reducing direction to the tightening band 2.

  Here, the fastening band 2 has a first flange 21 protruding outward from the outer peripheral surface at one end 2a in the bending direction, and the other end 2b in the bending direction is the inner peripheral surface of the one end 2a. And a second flange 22 projecting outward from the outer peripheral surface so as to be opposed to the first flange 21 at a position close to the other end 2b in the state of being inserted along.

  The first flange 21 is formed by bending the outermost end portion of the one end portion 2a outward, and a reinforcing plate 211 is fixed to the surface facing the second flange 22 by spot welding. The second flange 22 also has a leg portion 23 bent in a substantially L shape in cross section, and the leg portion 23 is fixed to the outer peripheral surface of the fastening band 2 by spot welding. The first flange 21 is opposed to the first flange 21. A reinforcing plate 221 is also fixed to the second flange 22 by spot welding on the surface facing the first flange 21.

  The first and second flanges 21 and 22 thus configured are formed so as to face each other substantially in parallel with the other end 2b inserted along the inner peripheral surface of the one end 2a. Yes. The flanges 21 and 22 and the reinforcing plates 211 and 221 are each formed with two through holes 21a and 22a into which the bolts 5 can be inserted. That is, two through holes 21 a are formed in the flange 21 and the reinforcing plate 211, and two through holes 22 a are also formed in the flange 22 and the reinforcing plate 221.

  As shown in FIG. 3, the bolt 5 is inserted into the through-holes 21a and 22a, and the nut 6 is screwed from the tip portion thereof through the washer 6a. The bolt 5 and the nut 6 can be tightened in the direction of reducing the diameter of the tightening band by displacing the first and second flanges 21 and 22 in directions close to each other by these tightening forces. Yes.

  The inner rubber plate 3 is bonded to at least one portion (one place) on the inner peripheral surface of the fastening band 2. That is, in this example, the inner rubber plate 3 has one end portion 3a in the bending direction on the outer surface thereof bonded to the inner peripheral surface of the portion corresponding to the second flange 22 of the fastening band 2, and on the outer surface thereof. A substantially central portion 3 b in the bending direction is bonded to the inner peripheral surface of the fastening band 2. For this reason, the other end 2 b of the tightening band 2 can be inserted between the one end 2 a of the tightening band 2 and the inner rubber plate 3. The inner rubber plate 3 may be adhered to the inner peripheral surface of the fastening band 2 at one of the one end portion 3a and the substantially central portion 3b (that is, one portion in the bending direction).

  As shown in FIGS. 2 (b) and 3, the hole closing rubber plate 4 has a double-sided tape 41 having a release paper 41 a bonded to the inner surface of the drain pipe P that is in contact with the outer peripheral surface of the hole P 1. That is, the double-sided tape 41 is bonded along a pair of opposite sides on the inner surface of the hole closing rubber plate 4, and is used to close the outer peripheral surface of the drain pipe P around the hole P 1 by peeling off the release paper 41 a. The rubber plate 4 can be bonded.

  The piping hole closing structure 1 configured as described above includes a tightening band 2, an inner rubber plate 3, a hole closing rubber plate 4, a bolt 5 and a nut 6, and the tightening band 2 has a belt shape. And is formed so as to be attached to the outer peripheral surface of the drain pipe P by opening and closing the distance between both ends 2a, 2b in the bending direction by elastic deformation and / or plastic deformation. The inner rubber plate 3 is provided along the inner peripheral surface of the fastening band 2, and the hole closing rubber plate 4 is larger than the hole P 1 of the drain pipe P, and is formed on the inner surface of the inner rubber plate 3. The bolt 5 and the nut 6 are configured to press the hole closing rubber plate 4 around the hole P1 in the drain pipe P by applying a tightening force in the direction of diameter reduction to the tightening band 2. Using the hinge shown in the conventional example Without attached on the outer circumference of the drain pipe P, waste water can be prevented from leaking from the hole P1. In addition, since the fastening band 2 is made of a material having low bending rigidity, it can be attached to drain pipes P having different diameters.

  Therefore, the structure can be simplified and the manufacturing cost can be reduced, and the versatility can be improved.

  Although the fastening band 2 has low bending rigidity, the inner rubber plate 3 and the hole closing rubber plate 4 are connected to the drain pipe P by the action of tension generated when the diameter of the fastening band 2 is reduced. It can be strongly pressed against the outer peripheral surface. In this case, since the hole closing rubber plate 4 is provided on the inner surface of the inner rubber plate 3, a portion having a particularly high surface pressure that only the hole closing rubber plate 4 hits is generated around the hole P1 in the drain pipe P. Can be made.

  Therefore, even when a relatively large hole P1 for cleaning is formed in the drain pipe P, it is possible to reliably prevent drainage and the like from leaking to the outside from the hole P1. Moreover, since the inner rubber plate 3 is provided along the inner peripheral surface of the fastening band 2, even if the drain pipe P is made of plastic such as polyvinyl chloride, the fastening band 2 made of stainless steel is used. It is possible to prevent the drain pipe P from being damaged such as scratches.

  The fastening band 2 has a first flange 21 at one end 2a in the bending direction and a second flange 22 at a position close to the other end 2b in the bending direction. By tightening the first and second flanges 21 and 22 in the direction of approaching each other by the nut 6 and the nut 6, it is possible to generate a tension for reducing the diameter of the tightening band 2, and thereby the hole closing rubber plate 4 can be strongly pressed against the outer peripheral surface of the drain pipe P.

  That is, the hole closing rubber plate 4 is attached to the outer peripheral surface of the drain pipe P by a device having a very simple structure including the first and second flanges 21 and 22 provided on the fastening band 2, the bolt 5 and the nut 6. Can be pressed with great force.

  Furthermore, since the inner rubber plate 3 has only to be bonded to at least one portion on the inner peripheral surface of the fastening band 2, it is possible to reduce the man-hours required for bonding the fastening band 2 and the inner rubber plate 3. In this example, since the adhesion between the inner peripheral surface of the one end portion 2 a of the tightening band 2 and the inner rubber plate 3 is avoided, the tightening band 2 is interposed between the one end portion 2 a and the inner rubber plate 3. The other end 2b can be inserted. Therefore, it is possible to prevent the drain pipe P from being damaged by the other end 2b of the fastening band 2.

  When the fastening band 2 and the inner rubber plate 3 are bonded at one portion (one place) in the bending direction, the fastening band 2 is tightened when elastically deforming and / or plastically deforming in the bending direction. Since the inner rubber plate 3 can be relatively displaced with respect to the attached band 2, there is an advantage that the degree of freedom of bending deformation of the fastening band 2 can be improved.

  Further, the hole closing rubber plate 4 can be temporarily fixed to the outer peripheral surface of the drain pipe P so as to cover the hole P1 by using a double-sided tape. Therefore, since the fastening band 2 having the inner rubber plate 3 can be mounted after temporarily fixing the hole closing rubber plate 4, it is possible to improve workability when closing the hole P1.

  On the other hand, since the fastening band 2 is formed of a stainless steel plate and the inner rubber plate 3 and the hole closing rubber plate 4 are formed of a rubber plate, deterioration of these members can be prevented over a long period of time. Therefore, for example, when cleaning is performed at intervals of 1 to 2 years using the hole P1 formed in the drain pipe P, the drainage from the hole P1, etc. with sufficient margin until the next cleaning is performed. Leakage can be prevented.

  In the above embodiment, an example in which a metal plate made of a stainless steel plate is used as the fastening band 2 is shown. However, the metal plate may be a metal plate having corrosion resistance such as aluminum. The inner rubber plate 3 and the hole closing rubber plate 4 may be formed of a plate having rubber elasticity other than the nitrile rubber described above.

  Moreover, in the said Example, although the example which applied the piping hole closing structure 1 to the drain pipe P as piping for sewage was shown, the hole of other piping for water supply etc. is used for this piping hole closing structure 1 Needless to say, it may be used to close the door.

1 Piping hole closing structure 2 Tightening band 2a One end 2b Other end 3 Inner rubber plate (inner elastic plate)
4 Rubber plate for hole closing (elastic plate for hole closing)
5 bolts (tightening means)
6 Nut (tightening means)
21 First flange 22 Second flange 22a, 22b Through hole 41 Double-sided tape 41a Release paper P Drain pipe (pipe)
P1 hole

Claims (5)

A pipe hole closing structure for closing a hole in an existing pipe,
A fastening band, an inner elastic plate, a hole closing elastic plate, and a fastening means;
The fastening band is curved in a direction along the outer peripheral surface of the pipe by a band-shaped metal plate having a width covering the hole, and the distance between both end portions in the bending direction by elastic deformation and / or plastic deformation. Is configured to be attached to the outer peripheral surface of the pipe by opening and closing
The inner elastic plate is formed of a belt-like rubber elastic plate having a width covering the hole, and is provided along the inner peripheral surface of the fastening band,
The hole closing elastic plate is formed of a rubber elastic plate having a larger extent than the hole, and is provided along the inner surface of the inner elastic plate,
The piping characterized in that the tightening means presses the hole closing elastic plate around the hole in the piping by applying a tightening force in a diameter reducing direction to the tightening band. Hole closing structure. The tightening band has a first flange protruding outward from the outer peripheral surface at one end in the bending direction, and the other end in the bending direction is inserted along the inner peripheral surface of the one end A second flange projecting outward from the outer peripheral surface so as to face the first flange at a position near the other end of
The said fastening means is provided with the volt | bolt penetrated by the through-hole formed in each said 1st and 2nd flange, and the nut screwed together with this volt | bolt. Piping hole closing structure.   3. The piping hole closing structure according to claim 1, wherein the inner elastic plate is bonded to at least one portion in a bending direction on an inner peripheral surface of the fastening band.   The pipe hole closing structure according to any one of claims 1 to 3, wherein the elastic plate for hole closing has a double-sided tape having a release paper adhered to a surface that contacts the outer peripheral surface of the pipe. The fastening band is formed of stainless steel,
The pipe hole closing structure according to any one of claims 1 to 4, wherein the inner elastic plate and the hole closing elastic plate are formed of a rubber plate.

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