JP2009133121A - Closing method of opening, cleaning method inside of pipe inside, and opening and closing tool set - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary tool for closing used to easily attach a cover plate or the like to, for example, the opening of a drain pipe from the outside. <P>SOLUTION: This auxiliary tool 1 for closing comprises a tabular part 2 brought into contact with the rear surface of each of the opposed edge parts 6a of an opening 6 and a bolt 3 projecting from the front surface 2a of the tabular part 2 at right angle. An adhesive packing 12A is so attached as to be interposed between the front surface of the tabular part 2 put in the opening 6 and the inner surface around the opening 6. The opening is covered by inserting a cover plate 13 having an insertion hole 13c onto the bolt 3 of the auxiliary tool 1, and a nut 16 is tightened. Consequently, the opening 6 can be closed from the outside of the drain pipe 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The invention according to claim relates to a closing method for closing an opening provided in a tube from the outside, a cleaning method in a tube using the same, and an opening closing tool set usable in such a method. is there.

  In general, drainage pipes in apartment buildings have maintenance connections that can be removed (or opened and closed), and when the drainage is clogged, the connections can be opened to clean the inside of the pipes. It is like that.

  However, when the clogged part is far from the connecting part or the dwelling unit near the connecting part is absent, the connecting part cannot be used. In such a case, conventionally, the drain pipe was cut over several tens of centimeters at an appropriate location to remove clogging, and a new tube (short tube) was later added to the cut location by welding (or bonding, flange connection) or the like. .

  It is possible to clean the inside by opening a hole (opening) on the wall of the tube with a machine such as a horuseau, etc. without cutting the tube, but there is no means to attach the lid well after cleaning. There was no choice but to fasten with a band or fix the lid with welding or adhesive.

In addition, the following patent document 1 shows a hook bolt (a bolt in which one end is bent in an L shape to be a hook) to which a panel can be attached from one side.
JP-A-9-209479

  The work of cutting a part and then adding the pipe was very laborious, including welding, bonding, and flange connection. In some cases, it is difficult to use a welding machine, and it must be performed in a narrow space such as a piping space of an existing building.

  On the other hand, when a hole is made in the tube, it is not preferable in terms of appearance to use a band as means for attaching the lid. Also, once the lid is fixed by welding or bonding, it is impossible to open the lid again. It is inconvenient that the lid cannot be removed because the clogged portion is often clogged again.

If the hook bolt described in Patent Document 1 is used, the lid can be attached so as to be openable / closable. However, even if it is used, it is not easy to reliably close the hole of the pipe through which the fluid flows. Absent. This is because the bolts are easy to fall and it is difficult to attach the lid tightly to prevent water leakage. That is,
1) Since there is no means to fix the hook bolt to the pipe, and the bolt is a small part independent of other parts, it is possible to continue supporting the bolt by hand while attaching the lid or turning the nut. It's not easy.
2) Even if the packing is sandwiched between the periphery of the opening and the lid, it is easy to create a non-uniform gap between the two by sealing the opening with a curved lid on the cylindrical tube. Not always easy. It is necessary to prevent water leakage from not only between the periphery of the opening and the lid, but also between the bolt and the hole through which the bolt passes (insertion port). When multiple bolts are used, the tightening force of each bolt is uniform. It is also necessary to. Under such circumstances, it is difficult to reliably prevent water leakage from the pipe.

  An object of the present invention is to provide a method of closing an opening that facilitates an operation of closing the opening of a tube from the outside with a cover plate. Moreover, it is providing the cleaning method in a pipe | tube which utilizes the obstruction | occlusion method, and an opening obstruction | occlusion tool set.

The opening closing method described in the claims is a method for closing an opening (for example, reference numeral 6 in FIG. 4A) provided on the wall surface of the tube, and is characterized in the following manner.
1) The opening can be blocked from the inside of the tube with almost no gap (it can be about 1 to 2 mm or less between the inner surface of the tube or the opening) and can pass through the opening. A plate-like portion formed so as to be superposed on each back surface (surface opposite to the mounting side of the cover plate; inner surface of the tube) of the facing edge, and a bolt projecting at right angles to the front surface of the plate-like portion; For the closing assisting device that is integrated (integrated so that it does not separate and has no gap for liquid passage), the plate-like portion is inserted into the tube from the opening.
2) By overlapping each back surface of the edge and the plate-like portion with an adhesive packing therebetween, and overlapping the adhesive packing so as to close the gap between the opening and the plate-like portion, Then, the bolt is removed from the opening (for example, as shown in FIGS. 4 (2a and 2b)).
3) Further, it covers the opening and covers the outer surface of the tube with almost no gap. (When directly overlapping the outer surface of the tube, there is no problem even if a gap of about 1 to 2 mm or less is formed in a part between them. And a cover plate having an insertion port through which the bolt of the auxiliary tool can be passed over the outer surface of the tube by passing the bolt through the insertion port (for example, as shown in FIGS. 4 (3a and 3b)). .
4) Finally, tighten the nuts on the bolts on the front of the cover plate.

According to such a closing method, it is possible to easily attach the cover plate that closes the openings to the openings provided in the various pipes from the outside of the pipes so as to be sealed and removable. it can. The reason for the sealing property is that the sealing property can be enhanced by using an adhesive packing as in 2) above, and the leakage of fluid from the inside of the pipe can be surely prevented. The attachment is easy because the bolts for fixing the cover plate and the like are integrated with the closing assisting tool, so that it is easy to keep the bolts from falling. If the bolt protrudes to the front surface as described above in the closing aid, when the adhesive packing is attached, it is possible to hold the bolt with your hand and pull the closing aid forward. It is easy to prevent falling inside.
Sealing performance can be improved by using adhesive packing. Adhesive packing that is more deformable than ordinary packing or gasket, as in 2) above, each back of the edge and the plate shape of the auxiliary aid for closure This is because the adhesive packing sandwiches the gap between the opening and the plate-like portion. If the back of the edge and the plate-like part are overlapped with the adhesive packing as above, and the closing aid is fixed using the cover plate and nut as in 3) and 4) above, The adhesive packing is in intimate contact with the tube and the closing aid, etc., and prevents leakage of fluid in the tube very reliably. Even if there is a slight gap between the tube (or opening) and the closing aid, etc., the adhesive packing is pushed between them (this action works even when the pressure in the tube is high). Leakage is prevented. In addition, since the auxiliary | assistant tool for closure and the volt | bolt are united and there is no clearance gap which lets a liquid pass, a fluid does not leak through between both.

  In the closing method of the invention, the above-mentioned adhesive packing has an adhesive force that adheres to the inner surface of the pipe and does not fall spontaneously (falling off the pipe due to its own weight) and receiving the force. It is preferable to use a resin or rubber that deforms.

The advantages of using such an adhesive packing are as follows.
a) Due to adhesive strength, after 2) above, the packing can be attached to the pipe without holding it by hand, and the plate-like part of the closing aid is attached to the adhesive packing. Therefore, the closing aid can be temporarily fixed to the tube (near the opening) through the packing. That is, when attaching the cover plate and the nut, it is not necessary to keep holding the packing and the auxiliary aid for closing by hand, and the operation becomes easy. On the other hand, when opening the closed opening again, even if the cover plate is removed, the closing aid does not fall naturally into the tube based on the adhesive strength of the adhesive packing. Is easy. Since the adhesive packing can be sandwiched between each back of the edge of the opening and the plate-like part with a large area, the closure aid will be firmly strong if the packing has sufficient adhesive strength. Temporarily secured to the tube.
b) Because it is soft and can be freely deformed (plastic deformation and elastic deformation), even if there is a gap between the plate-like part of the closure aid and the opening, it is pushed into it to seal the gap. Can do. Therefore, high sealing performance can be achieved with respect to the closing of the opening, and the fluid flowing in the tube can be effectively prevented from leaking out of the tube. In addition to preventing leakage to the outside of the cover plate (outside the outer edge), it also prevents leakage to the inside of the cover plate (close to the bolt insertion port), so fluid can flow along the bolts of the closure aids. Exudation can also be avoided.

  For the above-mentioned closing method, put the plate-like part of the auxiliary aid for closing into the tube, and overlap each back of the edge as shown in 2) above with the adhesive packing, and then the outer surface of the tube And after attaching a putty material having a lower adhesive strength than the adhesive packing in a range from the surface of the auxiliary tool to the plate-like portion surface, the cover plate is placed on the outer surface of the tube as in 3) above. Then, it is more preferable. 4 (3b) shows an example in which no putty material is used, but FIG. 1 (a) shows an example in which a putty material is used as described above.

When the putty material is used as described above, the opening closing force (sealing property) by the adhesive packing is increased, so that water leakage can be effectively prevented even when the pressure in the pipe is high. Part of the adhesive packing that is attached so as to close the gap between the opening and the plate-like portion is not even between the back of the edge and the plate-like portion of the closing aid. Although it does not pinch, if you put the cover plate after attaching the putty material in the range from the outer surface of the tube to the plate-like part surface as above, such a part of adhesive packing also puts the outer side of the putty material And supported by a cover plate. In other words, even if the amount of adhesive packing that does not fit between the back of the edge and the plate-like part is small in quantity and does not contact the cover plate, the adhesive packing is backed up with putty material etc. It becomes easy to withstand the pressure in the pipe.
Further, since the putty material having a lower adhesive strength than the adhesive packing is used, there is an advantage that when the closed opening is reopened, the cover plate can be easily removed and the work can be efficiently performed.

In the pipe cleaning method of the invention according to the claim, an opening is provided in the wall surface of the pipe, the pipe is cleaned through the opening (clogging is removed, etc.), and after the cleaning is completed, any one of the above-described blocking methods is used. It is characterized by closing the opening.
If it does in that way, the opening provided in the wall surface of the pipe | tube can be easily plugged as mentioned above, and the operation | work which cleans inside pipe | tubes, such as a drain pipe, can be easily performed in a short time as a whole. After that, it is easy to clean the inside of the pipe by opening the opening again.

The opening closing tool set according to the claim is for closing the opening provided on the wall surface of the tube,
An opening closing aid for attaching a cover plate for closing the opening to the opening, and closing the opening from the inside of the tube with almost no gap (for example, a concentric curved surface with respect to the tube outside It is good to have a gap of about 1 to 2 mm between the inner surface of the tube or the opening when it is directly stacked on the inside of the tube). An opening closing aid in which a bolt projecting at a right angle to the front surface is integrated with a plate-like portion formed so as to be in contact with each other on the back surfaces of opposing edges;
The peripheral edge of the opening and the inner side surface (rear surface) near the peripheral edge and the auxiliary so as to continuously block all the gaps between the plate-like part superimposed on the rear face of the edge and the peripheral edge of the opening. An adhesive packing that is annularly mounted between the plate-like portion of the tool,
Covers the opening and covers the outer surface of the tube with almost no gap (for this reason, for example, it is desirable to have a concentric curved surface inside the tube. The outer surface of the tube and the cover plate are directly connected. And a cover plate having an insertion port through which the bolt of the auxiliary tool can be passed.
-It is characterized by including a nut that fits on the bolt of the auxiliary tool coming out of the insertion hole of the cover plate.

  If such an opening closing tool set is used, the opening provided on the wall surface of the tube can be easily closed with a cover plate so that the fluid in the tube does not leak out by the above-described closing method. That is, the closing aid is applied to the opening, an adhesive packing is mounted between each back surface of the edge of the opening and the plate-like portion of the auxiliary tool, and the cover plate is placed on the outer side of the cover plate. The closing operation can be completed by passing the bolt of the auxiliary aid for closing through the insertion port of the, and fitting a nut to the bolt. Moreover, the cover plate can be removed by loosening the nut again, and if the adhesive packing is peeled off or cut off with a cutter knife or the like, the same opening can be used many times for cleaning the inside of the pipe. .

  It further includes a putty material having an adhesive strength lower than that of the adhesive packing, which is annularly mounted between the tube and the cover plate from the outer surface of the tube to the plate-like portion surface of the auxiliary tool. It is more preferable that a step or a protrusion for preventing the putty material from protruding is formed in an annular shape on the inner surface (that is, the back surface).

When including such putty material, it is attached to the range from the outer surface of the tube to the surface of the plate-like portion of the auxiliary tool, and the cover plate is placed on the outer surface of the tube, so that the above-mentioned merit is obtained. can get. That is, the opening closing force (sealability) by the adhesive packing is increased, and the cover plate is easily removed when the closed opening is opened again.
Further, when the cover plate as described above is used, the putty material can be prevented from protruding outside the cover plate even if the nut is strongly tightened. The tightening force makes it easier for the putty material or adhesive packing to enter the gap between the closing aid and the opening, so that water leakage from the inside of the tube can be prevented more effectively.

The cover plate is more preferably formed so that the periphery of the bolt insertion opening is formed thicker than the portion near the outer periphery.
When the portion near the center is thick, the cover plate is prevented from being opened by the tightening force of the nut (that is, the portion near the outer periphery is warped and deformed so as to be separated from the tube), and the adhesive packing is prevented from protruding. Therefore, it is possible to more securely prevent water leakage from the pipe by tightening the nut.

According to the method for closing an opening according to the claims, openings provided in various pipes can be easily and in a highly sealed state by work only from the outside of the pipe.
According to the cleaning method for the inside of the pipe according to the claims, the work for cleaning the inside of the pipe can be easily performed in a short time as a whole. After that, it is easy to clean the inside of the pipe by opening the opening again.

  The opening closing tool set which concerns on a claim makes it possible to close the opening provided in the pipe | tube by a preferable aspect by using it for the said closing method. The adhesive packing can also be strongly and effectively pressed to improve the sealing performance.

An embodiment of the invention will be described with reference to the drawings.
First, FIG. 1A shows a state in which the opening 6 on the wall surface of the drain pipe 5 is closed using the opening closing tool set 10 in a sectional view, and FIG. 1B shows a front view thereof. 2A to 2C show the closing aid 1. 3A to 3C show an embodiment of the cover plate 13 constituting the opening closing tool set 10.

  The closing aid 1 in FIG. 2 is integrally formed of vinyl chloride, and includes a plate-like portion 2, a bolt 3, and a central portion 4 protruding in a circle near the center of the front surface 2 a of the plate-like portion 2. Become. As shown in FIG. 1, the central portion 4 has a curved surface with the same curvature as the drain pipe 5, with a size that fits in the opening 6 of the drain pipe 5. As shown in FIG. 2, the bolt 3 is attached to the front surface 2a of the plate-like portion 2 (the front surface 4a of the central portion 4) so as to protrude in a direction perpendicular to the surface 2a, and is provided with a screw portion 3a.

  The rear surface 2b (opposite side of the front surface 2a) of the plate-shaped portion 2 is gradually curved from the end portion toward the central portion to gradually increase the thickness from the front surface 2a (see FIG. 2B). .

  As shown in FIG. 1, the closing tool set 10 is for closing the opening 6 opened in the side surface of the drain pipe 5 from the outside. In addition to the auxiliary tool 1, the adhesive packing 12A, the putty material 12B, the cover plate 13 and nut 16.

  The adhesive packing 12A is made of an adhesive and deformable plastic rubber (for example, unvulcanized butyl rubber), and is formed between the back surface (inner side surface) of the opening 6 and the plate-like portion 2 of the auxiliary tool 1, and the opening 6. It arrange | positions cyclically | annularly so that the clearance gap 14 between the plate-shaped parts 2 may be block | closed, and a water leak is prevented. The putty material 12B is a so-called cooler putty and is a clay-like material that fills various gaps. However, a material having a lower adhesive strength than the adhesive packing 12A is adopted, and the periphery of the opening 6 and the auxiliary tool 1 A cover plate 13 is closely attached to the outer side of a ring that is attached to a portion that spans the central portion 4.

The cover plate 13 covers the opening 6 and is attached to the outer peripheral surface of the drain pipe 5 and is made of vinyl chloride. The inner surface is a curved surface concentric with the tube 5, and the outer diameter is larger than the opening 6. As shown in FIG. 3, an insertion port 13 c for passing the bolt 3 of the auxiliary tool 1 is provided at the center of the cover plate 13. A step 13a that protrudes toward the drain pipe 5 is provided around the inner edge of the cover plate 13 (the side facing the drain pipe 5) over the entire circumference to prevent the inner putty material 12B from protruding from the cover plate 13. Yes. The central portion of the cover plate 13 (around the insertion opening 13c) is formed thicker toward the outside, and serves as a reinforcing member 13b that prevents the plate-like portion 2 from being deformed when the auxiliary tool (screw) is tightened ( (See FIGS. 3B and 3C). Since the reinforcing member 13b has a flat portion near the center, the nut 16 can be tightened stably.
As the nut 16, a special one is not necessary, and a commercially available one can be used.

Next, a method for closing the opening 6 of the drain pipe 5 using the closing tool set 10 will be described with reference to FIGS.
First, the plate-like portion 2 of the auxiliary tool 1 is inserted into an opening 6 (see FIG. 4 (1)) provided on the side surface of the drain pipe 5, and on each back surface of the upper and lower edge portions 6 a facing each other in the opening 6. From the inside of the tube 5, the front surface 2 a of the plate-like portion 2 of the auxiliary tool 1 is brought into contact, and the central portion 4 is fitted into the opening 6 (see FIG. 4 (2 a)). At this time, the adhesive packing 12A is previously attached to the front surface of the plate-like portion 2 of the auxiliary tool 1 (or the inside of the opening 6 of the tube 5 (the back surface of the edge portion 6a, etc.)), and the plate-like portion 2 is placed inside the tube 5. So that the adhesive packing 12A is sandwiched between the two. The adhesive packing 12A is used in a large amount, and it is preferable that the adhesive packing 12A is filled in the gap 14 so as to protrude outside the plate-like portion 2 (see FIG. 4 (2b)).

  As a result, the auxiliary tool 1 is temporarily fixed to the opening 6 with the bolt 3 facing outward. That is, the auxiliary tool 1 can be provided without supporting means due to the friction related to the fitting between the central portion 4 and the opening 6 and the adhesive force between the tube 5 and the plate-like portion 2 by the adhesive packing 12A. It will not fall naturally. In FIG. 4, the plate-like portion 2 is arranged in the vertical direction. However, if the shape of the plate-like portion in the longitudinal direction matches the curvature of the drain pipe, the plate-like portion 2 is similarly stabilized even if provided in the horizontal direction.

  If the pipe 5 has a high working pressure, the putty material 12B shown in FIG. 1 (a) spans the periphery of the opening 6 and the central portion 4 in the state shown in FIGS. 4 (2a) and (2b). It is better to wear the entire circumference while pressing. This is performed by holding the bolt 3 of the auxiliary tool 1 so that the auxiliary tool 1 does not fall even if pressed strongly. When the internal pressure of the pipe 5 is not high (for example, when drainage is made to flow at a low pressure), it is not necessary to use the putty material 12B, and the adhesive packing 12A is protruded to the outside as shown in FIG. Use more.

  Next, the cover plate 13 is put on the opening 6 while the insertion opening 13c of the cover plate 13 (FIG. 3) is passed through the bolt 3 of the auxiliary tool 1. When the cover plate 13 is pushed in strongly while holding the bolt 3 by hand, the cover plate 13 comes into close contact with the putty material 12B or the protruding adhesive packing 12A, and is in a state of backing them up (FIGS. 4 (3a and 3b)).

  Finally, the nut 16 shown in FIGS. 1A and 1B is fastened to the bolt 3. A portion of the bolt 3 protruding from the nut 16 can be cut off if unnecessary. Further, a washer (not shown) may be passed through the bolt 3 before fitting the nut.

  As shown in FIG. 1A, since the cover plate 13 has a step 13a, the putty material 12B and the adhesive packing 12A are not easily protruded even if the nut 16 is strongly tightened. The adhesive packing 12 </ b> A can be pressed toward the center of the drain pipe 5. Even when there is a gap 14 of about 1 to 2 mm or less between the opening 6 and the central portion 4, the adhesive packing 12 </ b> A can be pushed into the gap 14 and good sealing performance can be maintained.

  Thus, since the auxiliary tool 1 can be temporarily fixed to the opening 6, the cover plate 13 can be easily attached only from the outside of the drain pipe 5. Since the cover plate 13 is fixed by the auxiliary tool 1 and the nut 16, it can be removed as necessary and the opening 6 can be reused. If the opening 6 can be appropriately opened and closed in this way, it is convenient to clean the inside of the pipe 5 through the opening 6.

  In general, in a drain pipe, a T-joint (T-type joint) or a Y joint is easily clogged with a rod-like solid or the like. Therefore, as shown in FIG. 5, it is also meaningful to provide openings in those joint portions 15 and close them with the closing tool set 10 as described above.

  It is also conceivable to take an embodiment as shown in FIG. 6 for the cover plate. The cover plate 23 shown in FIG. 6 has a protrusion 23a over the entire circumference instead of the step 13a. The protrusion 23a can prevent the putty material 12B (or adhesive packing 12A) from protruding outside the cover plate.

  In the above example, the case where the opening provided in the pipe is closed has been described. However, the closing tool set, the closing aid, and the closing method according to the invention can be applied to a cover plate in a hole provided on a flat wall surface of a building or the like. It can also be used when installing or equivalent panels. The material for the closing aid and the cover plate is not limited to vinyl chloride.

1A is a cross-sectional view showing a state in which the opening 6 on the side surface of the drain pipe 5 is closed using the opening closing tool set 10 according to the invention, and FIG. 1B is a front view (viewed from the tip side of the bolt 3). Figure). FIG. 2 (a) is a front view showing an embodiment of the closure assisting tool 1, wherein FIG. 2 (b) is a side view thereof, and FIG. 2 (c) is a plan view thereof (viewed from below in FIG. 2 (a)). ). 3A is a front view of the cover plate 13, FIG. 3B is a sectional view taken along line bb, and FIG. 3C is a plan view thereof (viewed from below in FIG. 3A). It is. FIG. 4 is an explanatory diagram showing a procedure for using the opening closing tool set 10. 4 (1) is a front view of the opening 6 before the opening closing tool set 10 is attached, FIG. 4 (2a) is a front view showing a temporarily fixed state of the closing auxiliary tool 1, and FIG. 4 (2b) is a sectional view thereof. (3a) is a front view showing a state where the cover plate 13 is further mounted, and (3b) is a sectional view thereof. FIG. 3 is a perspective view showing a state where an opening closing tool set 10 is attached to a joint portion 15. It is sectional drawing which shows the cover plate 23 which is another embodiment of invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Closure aid 2 Plate-shaped part 3 Bolt 4 Center part 5 Drain pipe 6 Opening 10 Opening closing tool set 12A Adhesive packing 12B Putty material 13/23 Cover plate 13a Step 13c Insertion hole 16 Nut

The opening closing method described in the claims is a method for closing an opening (for example, reference numeral 6 in FIG. 4A) provided on the wall surface of the tube, and is characterized in the following manner.
1) The opening can be blocked from the inside of the tube with almost no gap (it can be about 1 to 2 mm or less between the inner surface of the tube or the opening) and can pass through the opening. A plate-like portion formed so as to be superposed on each back surface (surface opposite to the mounting side of the cover plate; inner surface of the tube) of the facing edge, and a bolt projecting at right angles to the front surface of the plate-like portion; For the closing assisting device integrated into one piece (no separation and no gap for allowing liquid to pass through), the plate-like portion is inserted into the tube through the opening.
2) By overlapping each back surface of the edge and the plate-like portion with an adhesive packing therebetween, and overlapping the adhesive packing so as to close the gap between the opening and the plate-like portion, Then, the bolt is removed from the opening (for example, as shown in FIGS. 4 (2a and 2b)).
3) Attach a putty material having a lower adhesive strength than the adhesive packing in the range from the outer surface of the tube to the surface of the plate-like portion of the auxiliary tool.
4) Further, it covers the opening and covers the outer surface of the tube with almost no gap. (When directly overlapping the outer surface of the tube, a gap of about 1 to 2 mm or less may be formed in a part between the two. And a cover plate having an insertion port through which the bolt of the auxiliary tool can be passed over the outer surface of the tube by passing the bolt through the insertion port (for example, as shown in FIGS. 4 (3a and 3b)). .
5) Finally, tighten the nuts on the bolts on the front of the cover plate.

According to such a closing method, it is possible to easily attach the cover plate that closes the openings to the openings provided in the various pipes from the outside of the pipes so as to be sealed and removable. it can. The reason for the sealing property is that the sealing property can be enhanced by using an adhesive packing as in 2) above, and the leakage of fluid from the inside of the pipe can be surely prevented. The attachment is easy because the bolts for fixing the cover plate and the like are integrated with the closing assisting tool, so that it is easy to keep the bolts from falling. If the bolt protrudes to the front surface as described above in the closing aid, when the adhesive packing is attached, it is possible to hold the bolt with your hand and pull the closing aid forward. It is easy to prevent falling inside.
Sealing performance can be improved by using adhesive packing. Adhesive packing that is more deformable than ordinary packing or gasket, as in 2) above, each back of the edge and the plate shape of the auxiliary aid for closure This is because the adhesive packing sandwiches the gap between the opening and the plate-like portion. If the back of each edge and the plate-like part are overlapped with the adhesive packing as above, and the closing aid is fixed using the cover plate and nut as in 4) and 5) above , The adhesive packing is in intimate contact with the tube and the closing aid, etc., and prevents leakage of fluid in the tube very reliably. Even if there is a slight gap between the tube (or opening) and the closing aid, etc., the adhesive packing is pushed between them (this action works even when the pressure in the tube is high). Leakage is prevented. In addition, since the auxiliary | assistant tool for closure and the volt | bolt are united and there is no clearance gap which lets a liquid pass, a fluid does not leak through between both.

For the above-mentioned closing method, put the plate-like part of the auxiliary aid for closing into the tube, and overlap each back of the edge as shown in 2) above with the adhesive packing, and then the outer surface of the tube And after attaching a putty material having a lower adhesive strength than the adhesive packing in a range from the surface of the auxiliary tool to the plate-like portion surface, the cover plate is placed on the outer surface of the tube as in 4) above. Then, it is more preferable. 4 (3b) shows an example in which no putty material is used, but FIG. 1 (a) shows an example in which a putty material is used as described above.

The opening closing method described in the claims is a method for closing an opening (for example, reference numeral 6 in FIG. 4 (a)) provided on the wall surface of the pipe by an operation only from the outside of the pipe. It is characterized by.
1) The opening can be blocked from the inside of the tube with almost no gap (it can be about 1 to 2 mm or less between the inner surface of the tube or the opening) and can pass through the opening. A plate-like portion formed so as to be superposed on each back surface (surface opposite to the mounting side of the cover plate; inner surface of the tube) of the facing edge, and a bolt projecting at right angles to the front surface of the plate-like portion; For the closing assisting device integrated into one piece (no separation and no gap for allowing liquid to pass through), the plate-like portion is inserted into the tube through the opening.
2) Each rear surface of the edge portion and the the plate-like portion, an adhesive gasket therebetween scissors, and its adhesive packing by superimposing so as to close the gap between the aperture and the plate-like portion, Nature The auxiliary aid for closing is temporarily fixed to the tube by the adhesive force of the adhesive packing so as not to fall, and the bolt is taken out from the opening (for example, as shown in FIGS. 4 (2a and 2b)).
3) Attach a putty material having a lower adhesive strength than the adhesive packing in the range from the outer surface of the tube to the surface of the plate-like portion of the auxiliary tool.
4) Further, it covers the opening and covers the outer surface of the tube with almost no gap. (When directly overlapping the outer surface of the tube, there is no problem even if a gap of about 1 to 2 mm or less is formed in a part between them. And a cover plate having an insertion port through which the bolt of the auxiliary tool can be passed over the outer surface of the tube by passing the bolt through the insertion port (for example, as shown in FIGS. 4 (3a and 3b)). .
5) Finally, tighten the nuts on the bolts on the front of the cover plate.

Claims (7)

A method for closing an opening provided in a wall surface of a pipe,
1) A plate-like portion formed so as to be able to close the opening from the inside of the tube with almost no gap and to pass through the opening, and to be superimposed on each back surface of the opposite edge across the opening; For the closure auxiliary tool integrated with a bolt projecting at right angles to the front surface of the plate, the plate-like portion is put into the pipe from the opening,
2) By overlapping each back surface of the edge and the plate-like portion with an adhesive packing therebetween, and overlapping the adhesive packing so as to close the gap between the opening and the plate-like portion, Unscrew the bolt from the opening above,
3) A cover plate that covers the opening and covers the outer surface of the tube with almost no gap and has an insertion port through which the bolt of the auxiliary tool can be passed is passed over the outer surface of the tube by passing the bolt through the insertion port. Cover
4) A method of closing an opening, characterized by tightening a nut on a bolt protruding from the front surface of the cover plate.   2. The adhesive packing according to claim 1, wherein the adhesive packing is made of a resin or rubber that has an adhesive force that adheres to the inner surface of the tube and does not fall naturally, and is deformed by the force. How to close the opening.   After the plate-like portion of the auxiliary aid for closure is put in the pipe as described above, the adhesive packing is put on each back surface of the edge portion as described above, and then the plate of the auxiliary tool is taken from the outer surface of the pipe. 3. The opening according to claim 2, wherein a putty material having a lower adhesive strength than the adhesive packing is attached in a range extending to the surface of the shaped portion, and the cover plate is placed on the outer surface of the tube. Blocking method.   An opening is provided in the wall surface of the pipe, the inside of the pipe is cleaned through the opening, and the opening is closed by the opening closing method according to any one of claims 1 to 3 after the cleaning is completed. Cleaning method. An opening closing tool set for closing an opening provided on a wall surface of a pipe,
An opening closing aid for attaching a cover plate for closing the opening to the opening, closing the opening from the inside of the tube with almost no gap and passing through the opening. An opening closing aid in which a bolt projecting at right angles to the front surface is integrated with the plate-like portion formed so as to be in contact with each other on the back surface;
The peripheral edge of the opening and the inner side surface in the vicinity of the peripheral edge and the plate shape of the auxiliary tool so as to continuously block all the gaps between the plate-like part in a state of being overlapped on the back surface of the edge and the peripheral edge of the opening. An adhesive packing that is annularly mounted between the two parts,
A cover plate that covers the opening and covers the outer surface of the tube with almost no gap, and has an insertion port through which the bolt of the auxiliary tool can pass.
An opening closing tool set, comprising: a nut that fits onto the bolt of the auxiliary tool that comes out of the insertion opening of the cover plate. It further includes a putty material having an adhesive force lower than that of the adhesive packing, which is annularly mounted between the tube and the cover plate from the outer surface of the tube to the plate-like portion surface of the auxiliary tool.
6. The opening closing tool set according to claim 5, wherein a step or a protrusion for preventing the putty material from protruding is formed in an annular shape on the inner surface of the cover plate.   The opening closing tool set according to claim 5 or 6, wherein the cover plate is formed so that the periphery of the insertion opening is thicker than the portion near the outer periphery.

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