METHOD OF FILLING IN SLEEVE HOLE FOR PIPING AND REPAIRING STRUCTURE THEREFOR

Abstract: A method of filling in a sleeve hole for a piping and a re­ pairing material or structure therefor are disclosed which is capable of stopping the sleeve hole completely to effectively prevent leakage of water, gas, noise and the like. The method uses a repairing material or structure comprising a bendable sheet which is provided at substantially the central portion thereof with an insertion hole for the piping and has a water­ proof adhesive layer deposited on the upper surface thereof.

Description: METHOD OF FILLING IN SLEEVE HOLE FOR PIPING AND REPAIRING STRUCTURE THEREFOR BACKGROUND OF THE INVENTION Field of the Invention This invention relates to a method of filling in a sleeve hole for a piping and a repairing material or structure therefor, and more particularly to a method of filling in a sleeve hole for a piping in a building and a repairing material or structure suitable for use for stopping such a sleeve hole. Description of the Prior Art A high building, a multi dwelling house and the like now are constructed according to a rational process using structural calculation by a computer in view of fireproof, earthquake-proof and the like. On the contrary, work for filling in (stopping) a sleeve hole for a piping in a building after the plumbing work, sanitary work, air-conditioning work, electrical work, gas fitting work, hot water supply work, ventilation work or the like is still carried out according the irrational old method. This causes the stopping of the sleeve hole to be incompletely carried out, resulting in not only the leakage of water, gas and and/or noise to the upper and lower floors and adjacent rooms but the dissemination of poisoning due to gas leakage, the spread of a fire and the like often occurring. Conventionally, the filling in of such a sleeve hole is carried out in a manner such that a plywood is applied to the lower surface of a member provided with the sleeve hole to close the hole and then is upward supported by a common rafter and thereafter mortar is poured into the sleeve hole through the upper open end thereof. Such a conventional method will be more detailedly described with reference to Fig. 5. In Fig. 5, reference numeral 51 designates a slab having a vertical sleeve hole 52 formed therethrough and reference numeral 53 designates a piping for tap water or the like inserted through the sleeve hole 52. The sleeve hole 52 is filled in according to the following manner. First, an annular plate member 54 which is formed by boring the central portion of a disc-like plywood and provided with a cutting line extending from the inner periphery thereof to the outer periphery thereof is fitted on the piping 53 through the cutting line. Then, a supporting means or common rafter 55 is upward abutted against the lower surface of the plate member 54 to rigidly support the member 54 thereon. Thereafter, mortar 56 is poured into the sleeve hole 52 through the upper open end thereof and solidified. However, such conventional method has a disadvantage of being highly troublesome and failing to carry out satisfied stopping of the sleeve hole. More particularly, since the boring of the disc-like plywood which is required to take place to conform the outer diameter of the piping 53 is carried out by means of a saw, it is highly difficult to form the bore of the annular plate member 54 to allow it to conform the piping 53. This results in a gap 57 being defined between the piping 53 and the inner periphery of the annular plate member 54. Also, the formation of the annular plate member 54 requires much time and labor. Further, the annular plate member 54 is pressedly abutted against the slab 51 by the rafter 55, however, this fails to cause the plate member 54 to be intimately contacted with the slab 51 due to the plate member lacking bendability or flexibility. Furthermore, the plate member 54 is required to be removed in view of fire prevention after the solidification of mortar. Thus, it will be noted that the conventional method requires much time and labor and carries out the incomplete stopping of the sleeve hole. Moreover, in the conventional method, when mortar 56 is poured into the sleeve hole 52, a part of mortar 56 and water contained therein leaks through a gap 58 between the slab 51 and the plate member 54 and the gap 57 between the plate member 54 and the piping 53, as indicated at 56a and 56b in Fig. 5. In order to avoid such a problem, the use of rather hard mortar which is hard to leak is required. However, such mortar fails to be uniformly solidified and forms concrete having deficiencies such as a large number of small voids, cavities and the like which would cause the leakage of water, gas, noise and the like from the upper and lower floors and adjacent rooms. Thus, it would be desirable to provide a method of filling in a sleeve hole for a piping which is capable of effectively preventing the leakage of gas, water, noise and the like and a repairings material or structure suitable for use for practicing the method. SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing disadvantage of the prior art. Generally speaking, in accordance with the present invention, a method of filling in a sleeve hole for a piping comprising the steps of providing repairing material or structure comprising a bendable sheet which is provided at substantially the central portion thereof with an insertion hole and has a waterproof adhesive layer coated on one surface thereon; inserting the piping through the insertion hole of the repairing material; adhering the repairing material to stop one end of the sleeve hole; and pouring mortar into the sleeve and solidifying the mortar. In accordance with the present invention, there is also a repairing material or structure suitable for use for filling in a sleeve hole for a piping comprising a bendable sheet having a waterproof pressure-sensitive adhesive layer coated on one surface and provided at substantially central portion thereof with an insertion hole. Accordingly, it is an object of the present invention to provide a method of filling in a sleeve hole for a piping which is capable of effectively stopping a sleeve hole of a slab for a piping. It is another object of the present invention to provide a method of filling in a sleeve hole for a piping which significantly decreases time and labor required for the stopping operation. It is another object of the present invention to provide a method of filling in a sleeve hole for a piping which is capable of being practiced in a simple manner without any troublesome operation and skill. It is a further object of the present invention to provide a repairing material or structure suitable for use for stopping a sleeve hole for a piping which is capable of effectively accomplishing the above-described objects. It is still a further object of the present invention to provide a repairing structure suitable for use for filling in a sleeve hole for a piping which is capable of exhibiting high sealing performance and strength. It is a moreover object of the present invention to provide a repairing structure suitable for use for filling in a sleeve hole for a piping which is simple in construction and manufactured at a low cost. Still other objects and advantages of the invention will in part be obvious and will in part be apparent from the specification. BRIEF DESCRIPTION OF THE DRAWINGS For a fuller understanding of the invention, reference is had to the following description taken in connection with the accompanying drawings, in which: Fig. 1 is a vertical sectional view showing a manner of practicing a method of filling in a sleeve hole for a piping according to the present invention; Fig. 2 is a perspective view showing one embodiment of a repairing structure suitable for use for filling in a sleeve hole for a piping according to the present invention; Fig. 3 is a perspective view showing another embodiment of a repairing structure according to the present invention; Fig. 4 is a further embodiment of a repairing structure according to the present invention; and Fig. 5 is a vertical sectional view showing a manner of practicing a conventional method of filling in a sleeve hole for a piping. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Now, a method of filling in a sleeve hole for a piping and a repairing structure therefor according to the present invention will be described hereinafter with reference to the accompanying drawings. Fig. 1 is a vertical sectional view showing a manner of practicing a method of filling in a sleeve hole for a piping according to the present invention and an embodiment of a repairing material according to the present invention, wherein reference numeral 11 designates a slab. The slab 11 is formed therethrough with a sleeve hole 12, through which a piping 13 for gas, tap water, electric wiring or the like is inserted. The piping 13 is provided to vertically extend through the respective floors of a building. The sleeve hole 12 is filled with mortar 14 to be closed. Reference numeral 15 designates a repairing structure arranged to stop the bottom portion of the sleeve hole 12. The repairing material 15 has a waterproof pressure-sensitive heavy-duty adhesive layer 17 formed on the overall surface thereof contacting with the slab 11 and piping 13 and is bonded through the adhesive layer 17 to the lower surface of the slab and the peripheral surface of the piping 13. In the illustrated embodiment, the adhesive layer 17 is formed on a bendable substrate comprising a sheet of butyl rubber and a aluminum sheet or foil laminated together. The adhesive layer 17 has a leg portion 19 of a cylindrical shape which is adhered to the piping 13. The term sheet" used in relation to a metal sheet herein includes both of a sheet and a foil. Fig. 2 is a perspective view of the repairing shown in Fig. 1, wherein reference numeral 20 indicates a flange portion of the repairing structure 15 which is adapted to be bonded onto the lower surface of the slab 11. Reference numeral 21 designates a cutting line formed along the overall length of the repairing 15 or so as to axially extend from the lower end of the leg portion 19 to the inner end of the flange portion 20 and then radially extend from the inner end of the flange portion 20 to the outer end thereof. 22 designates a hole defined in the interior of the cylindrical leg portion 19. The hole 22 has a diameter essentially equal to or slightly larger than the outer diameter of the piping 13. In the illustrated embodiment, the hole 22 is formed to have the same diameter throughout. However, it is formed into a frust-conical shape in section. The adhesive layer 17 of the repairing material 15 is previously covered with a releasable protective paper sheet (not shown), which is removed therefrom when the material 15 is used. The leg portion 19 is optionally shortened. Any material may be used for the substrate of the repairing material 17 so far as it is bendable. The word "bendable" material used herein means a material having flexibility or softness sufficient to allow the material to be uniformly intimately contacted with the surface of the slab 11 in a manner to conform to roughness of the surface when the repairing material 15 is adhered to the slab 11. The substrate may be formed of a composite material consisting of a sheet of metal such as aluminum, copper or the like and another sheet formed of paper, fabric, plastic or the like other than such a composite material of a butyl rubber sheet and an aluminum sheet as described above. Alternatively, the substrate may be formed of a single sheet material. For example, it may be formed of only a butyl rubber sheet without using an aluminum sheet. However, in order to improve the fire proofing properties of the repairing material 15, it is preferable to laminate a sheet of metal such as aluminum, copper or the like on the lower surface of the rubber sheet. Further, in the present invention, the metal sheet may be replaced with an asbestos sheet, which may be also singly used. The pressure-sensitive adhesive layer 17 of the repairing material 15 may be formed according to any suitable techniques conventionally known in the art. For example, the layer 17 may be directly applied to the substrate. Alternatively, it may be formed by applying a double-coated tape having a pressure-sensitive adhesive layer formed thereon onto the substrate. As an adhesive for the pressure-sensitive adhesive layer, any conventional pressure-sensitive adhesive may be used so far as it can adhere to concrete and the like. The term "waterproof" used in relation to the waterproof pressure-sensitive heavy-duty adhesive means that the repairing material adhered to concrete or the like is not peeled by water contained in mortar. Such adhesive include, for example, rubber adhesives such as nitrile rubber adhesive, chloroprene rubber adhesive and the like; vinyl adhesives such as a vinyl acetate adhesive and the like; acrylic adhesives; and the like. Fig. 3 is a perspective view showing another embodiment of a repairing material according to the present invention. In this embodiment, the portion corresponding to leg portion 19 in Fig. 1 is formed by folding down the centre portion of the repairing material. A repairing material of the illustrated embodiment generally designated by reference numeral 31 comprises a bendable substrate formed of an aluminum sheet 32 and a butyl rubber sheet 38 laminated on the aluminum sheet 32 and a waterproof pressure-sensitive adhesive layer 33 deposited on the upper surface of the butyl rubber sheet 38. Reference numeral 39 designates a releasable protective paper sheet covering the pressure-sensitive adhesive layer 33, which is removed immediately before the repairing material is used. The substrate is formed with a plurality of cutting lines 37. The cutting lines 37 radially extend from the center of the substrate by a suitable distance to separate the central portion of the substrate into a plurality of fan-shaped segments 36a which are adapted to be downward bent to provide a portion 36 adhered to a piping. In the illustrated embodiment, the cutting lines 37 extend by a distance substantially equal to the radius of the piping. The repairing material comprises the piping adhesion portion 36 and a flange portion 34. One of the cutting lines 37 extends to one side end of the substrate to form a long cutting line 35. The manner of use of the repairing material 31 constructed as described above will be hereinafter described. First, the fan-shaped segments 36a of the repairing material 31 constituting the circular piping adhesion portion 36 are downward bent to form a circular hole 36b and the repairing material 31 is expanded along the cutting line 35. Then, a piping (not shown) extending through a sleeve hole of a slab (not shown) is inserted through the circular hole 36b. Thereafter, the flange portion 34 is pushed against the lower surface of the slab to be adhered thereto and the segments 36a are adhered to the outer periphery of the piping, so that the bottom of the sleeve hole of the slab may be sealedly closed. Then, mortar is poured into the sleeve hole in such a manner as shown in Fig. 1. The diameter of the circular hole 36b is preferably essentially equal to or slightly smaller than the outer diameter of the piping. Fig. 4 is a perspective view showing a further embodiment a repairing material according to the present invention, wherein a repairing material is generally designated by reference numeral 41. The repairing material 41 of the illustrated embodiment is formed at the central region thereof with a blanked portion 49 and has a circular colored strip 50 of a width within a range of from about 4 mm to about 10 mm printed on the surface of a lower aluminum sheet along the periphery of an insertion hole 46 through which a piping (not shown) is to be inserted. In practice, the blanked portion 49 is pushed out by a finger to be removed from the repairing material 41 to form an identification hole which serves to facilitate the positioning of the piping at the center of the insertion hole 46. The annular colored strip 50 preferably has pressed inner and outer peripheral edges 50a and 50b formed by applying pressure thereto. The soformed pressed edges, particularly, edges 50a facilitate the operation of opening the insertion hole by bending segments 46a which are formed in a manner as described in the embodiment of Fig. 3. The remaining part of the repairing material 41 shown in Fig. 4 is constructed in substantially same manner as that shown in Fig. 3. More particularly, the repairing material comprises a bendable substrate formed of an aluminum sheet or foil 42 and a butyl rubber sheet 48 laminated on the aluminum sheet 42 and a pressuresensitive adhesive layer 43 formed on the upper surface of the butyl rubber sheet 48. The repairing material 41 is formed with a plurality of cutting lines 47 radially extending from the central blanked portion 49 to the annular colored strip 50 and comprises a piping adhesion portion 46 comprising a plurality of downward bendable fan-shaped segments 46a and a flange portion 44 surrounding the piping adhesion portion 46. One of the cutting lines 47 extends to one side end of the substrate to form a long cutting line 45. Reference numeral 49a designates an annular cutting line for the blanked portion 49. The pressure-sensitive adhesive layer 43 is covered with a releasable protective paper (not shown). The repairing material 41 shown in Fig. 4 is used substantially the same manner as that of Fig. 3. Each of the repairing materials or structures of the illustrated embodiments described above may be modified in a manner such that the releasable protective sheet is formed to be separated into two sections about the center thereof. This facilitates the operation of adhering the repairing material to the slab because it is possible to stagger the removal of the protective sheet. Thus, the repairing material is precisely positioned even at a limited place such as a corner of a room. In the embodiment shown in Fig. 4, the annular colored strip may be constructed to have an inner diameter corresponding to the outer diameter of a piping of the largest wall thickness such as an asbestos pipe. This allows a piping to be smoothly inserted through the insertion hole of the repairing material irrespective of the outer diameter thereof. Further, in each of the embodiments, the diameters of the piping insertion hole and piping adhesion portion may be adjusted depending upon the diameter of a piping used. Also, the flange portion of the repairing material may be formed into any suitable shape such as rectangle, circle or the like. Furthermore, the repairing material may be formed to have any suitable configuration such as circle, rectangle, polygon or the like. As can be seen from the foregoing, the method of the present invention effectively carries out the solidification of mortar while preventing the leakage of mortar from the bottom of the sleeve hole of the slab and maintaining the quality of mortar at a satisfied level. Also, the repairing material or structure for filling in a sleeve hole of, for example, a slab for a piping according to the present invention has satisfied bendability sufficient to be intimately bonded to the lower surface of the slab to effectively prevent the leakage of water, so that mortar poured in the sleeve hole may be uniformly solidified into concrete. Plywood used in the conventional method is under an obligation to be removed after the execution from the point of view of fire prevention, however, the use of aluminum, asbestos or the like for the substrate of the repairing material in the present invention eliminates the removing operation to simplify the process. (Moreover it can be easily peeled off when it is required). Further, the repairing material or structure of the present invention is formed with a plurality of the radially extending cutting lines, so that the bonding of repairing material to a piping may be significantly facilitated. Thus, it will be noted that the present invention perfectly stops the sleeve hole provided through the slab for the piping to effectively prevent the leakage of gas and water from the upper or lower floors or adjoining rooms, the spread of a fire and leakage of noise through the sleeve hole. The present invention has been described in connection with the vertical sleeve hole. However, the present invention is applicable to a hole of a side wall. It will thus be seen that the objects set forth above, and those made apparent from the preceding description, are efficiently attained and, since certain changes may be made in the above construction without departing from the spirit and scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

Claims: WHAT IS CLAIMED IS: 1. A method of filling in a sleeve hole for a piping comprising the steps of: providing a repairing structure comprising a bendable sheet which is provided at substantially the central portion thereof with an insertion hole and has a waterproof adhesive layer formed on one surface thereof; inserting said piping through said insertion hole of said repairing structure; adhering said sheet to one surface of a portion provided with said sleeve hole to stop one end of said sleeve hole; and pouring mortar into said sleeve hole and solidifying said mortar. 2. A method as defined in Claim 1 further comprising a step of adhering the portion of said sheet forming said insertion hole through said adhesive layer to the outer periphery of said piping to more effectively stop said sleeve hole. 3. A repairing structure suitable for use for filling in a sleeve hole for a piping comprising a bendable sheet having a waterproof pressure-sensitive adhesive layer formed on one surface thereof and provided at substantially the central portion thereof with an insertion hole. 4. A repairing structure as defined in Claim 3, wherein said insertion hole is formed by bending a plurality of fan-shaped segments formed by separating the central region of said repairing structure by means of a plurality of cutting lines which are provided on said repairing structure to radially extend from the center of said repairing structure by a distance substantially equal to the radius of said piping. 5. A repairing structure material as defined in Claim 4, wherein said sheet is provided at the central portion with a blanked portion. 6. A repairing structure as defined in Claim 3 further comprising an extension of a cylindrical shape which downward extends from the lower surface of said insertion hole and has an adhesive layer formed on the inner surface thereof, said extension being bonded at the inner surface thereof through said adhesive layer to the outer periphery of said piping. 7. A repairing structure as defined in Claim 6, wherein said repairing structure is formed with a cutting line which extends in the longitudinal direction of said extension and further from the insertion hole to the outer periphery thereof to open said repairing structure therethough. 8. A repairing structure as defined in Claim 3, wherein said repairing structure is provided with a cutting line extending from said insertion hole to the outer periphery of said sheet. 9. A repairing structure as defined in Claim 3, wherein said bendable sheet is laminated on a metal sheet, said waterproof pressure-sensitive adhesive layer being formed on the upper surface of said bendable sheet. 10. A repairing structure as defined in Claim 9, wherein said metal sheet comprises an aluminum sheet. 11. A repairing structure as defined in Claim 3 further comprising a releasable protective paper sheet applied onto said waterproof pressure-sensitive adhesive layer.

Inventors: KIMURA, MASATAKA, MIYANO, KAORU
Applicants: SHIBAYAMA KOGYO KABUSHIKI KAISHA
Application year: 1985
Main classification: F16L5
IPC codes: F16L5