JP2018031155A - Repair method for sash frame and inspection method on repaired state - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repair method for a sash frame and an inspection method on a repaired state used when repairing the sash frame by injecting a foaming resin, the sash frame being made by fixing a new sash frame inside an existing sash frame, and the repair method being capable of preventing pooling of water in a space formed on the sash frame side, reinforcing a fixed state of each sash, and preventing formation of a cavity when the foaming resin is foamed.SOLUTION: When repairing a sash frame made by fitting and fixing a new sash frame 4 inside an existing sash frame 3 fixed on an opening 2 of a building frame 1, a foaming resin is injected from a belt-like opening 14 into a space 22 formed between an inner peripheral surface of the existing sash frame 3 and an outer peripheral surface of the new sash frame 4, and the foaming resin is foamed and hardened to form a resin hardening layer 12 in the space 22.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method for repairing a sash frame such as a window or a door fixed to an opening of a housing, and an inspection method for the repaired state.

  When remodeling sash frames such as aging windows and doors, it is known to fix the new sash frame inside the existing sash frame without removing the existing sash frame. The method of fixing the new sash frame to the existing sash frame is roughly divided into the following two methods.

  One of them is a method called “covering method” or “cover method”. For example, as shown in Patent Document 1, a new sash frame is fitted inside an existing sash frame. In this method, the gap is fixed by welding or screwing via a connecting member. The other one is, for example, as shown in Patent Document 2, by injecting a foamable resin into a space formed between an existing sash frame and a new sash frame, and curing the foamed resin through the resin cured layer. In this method, the new sash frame is fixed to the existing sash frame.

JP 2007-138560 A JP 2010-156193 A

  By the way, in FIG. 5, as an example of the “covering method”, the existing sash frame 3 attached from the beginning to the opening 2 provided in the housing 1 has become old, so that it is newly added to the inside of the existing sash frame 3. A state is shown in which a newly installed sash frame 4 is fitted and both are fixed via a connector 6.

  In this state, the outer peripheral surface 3b of the existing sash frame 3 is in contact with the inner peripheral surface 2a of the opening 2, but the peripheral wall 3a extending in the thickness direction of the existing sash frame 3 is more than the outer peripheral surface 3b. Is also formed at a position retracted toward the center of the frame, so that a space extending along the inner peripheral surface 2a of the opening 2 is provided between the peripheral wall 3a and the inner peripheral surface 2a of the opening 2. 21 has occurred. The existing sash frame 3 is fixed at its lower edge to the inner peripheral surface of the opening 2 via a frame mounting seat 5 as an accessory of the existing sash frame 3. Then, the space 21 is formed between the frame mounting seat 5 and the existing sash frame 3.

  A space 22 is formed between the peripheral wall 3 a of the existing sash frame 3 and the peripheral wall 4 a of the new sash frame 4. And this space part 22 is in the state which faces outside through the strip | belt-shaped opening 14 and 15 opened on both the front and back both surfaces of this existing sash frame 3 and the new sash frame 4, and these each strip | belt-shaped opening 14 and 15 are the state. Sealed by sealing materials 7 and 8 respectively.

  However, in the state in which the new sash frame 4 is attached to the inside of the existing sash frame 3 by the “covering method” and the both are integrated, as described above, the inside of the opening 2 of the casing 1 Since the space 21 is formed between the peripheral surface 2a and the peripheral wall 3a of the existing sash frame 3, for example, when the casing 1 is cracked due to aging of the casing 1, Water W such as rain water may enter the space 21 through the cracks and accumulate there. Then, if the water W collected in the space portion 21 is left, for example, an iron connector (not shown) disposed in the space portion 21 to fix the existing sash frame 3 to the housing 1. There is a concern that the fixing strength of the existing sash frame 3 may be impaired due to corrosion, or that the water W contaminated by the mixing of iron rust may ooze out to the surface side of the housing 1 and contaminate the surroundings.

  On the other hand, since the space portion 22 is formed between the peripheral wall 3a of the existing sash frame 3 and the peripheral wall 4a of the new sash frame 4, for example, progress of aging due to long-term use or poor construction, etc. As a result of this, water W such as rainwater may enter the space 22 from the gaps between the sealing materials 7 and 8 and the existing sash frame 3 and the new sash frame 4 and accumulate there. If the water W collected in the space 22 is left as it is, the iron connecting tool 6 is corroded, and the connection strength between the existing sash frame 3 and the new sash frame 4 is impaired, or iron rust is mixed. Then, there is a concern that the brown water W may ooze out from the gap between the sealing materials 7, 8 and the existing sash frame 3 and the new sash frame 4 to stain the wall surface of the housing 1.

  Such problems caused by the ingress of rainwater into the spaces 21 and 22 due to the aging of the existing sash frame 3 and the new sash frame 4 can be removed by removing the existing sash frame 3 and the new sash frame 4 In order to solve without significantly changing the structure, it is necessary to repair each of the sash frames 3 and 4 so as to prevent rainwater from entering the spaces 21 and 22. As one of the construction methods useful as this repairing method, a foamable resin is injected and cured in each of the space portions 21 and 22, and the space portions 21 and 22 are filled with a cured resin layer. It is conceivable to prevent the intrusion of water into the spaces 21 and 22 and the occurrence of water pools.

  However, even if such a repair method by injection of foamable resin is applied to the repair of the existing sash frame 3 and the new sash frame 4, the above problems are not all solved. That is, even if the foaming resin injection method is adopted, the foamable resin can be sufficiently applied to the entire space parts 21 and 22 by simply injecting the foaming resin into the space parts 21 and 22 and foaming. However, the air reservoir is generated in some places, and the air reservoir becomes a cavity after the foamable resin is cured and remains in the cured resin layer. And if a cavity remains in such a resin cured layer, there arises a problem that rainwater or water due to condensation that has entered the spaces 21 and 22 enters the room through the cavity. Become.

  Therefore, the invention of the present application is to inject foamable resin into each space generated between the three bodies of the housing, the existing sash frame, and the new sash frame and fill each space with a foamed resin layer. It can prevent the occurrence of water pools, can reinforce the fixed state between the frame and the existing sash frame, and between the existing sash frame and the new sash frame, and also creates cavities when filling the above spaces with foamable resin It was made for the purpose of proposing the repair method of a sash frame and the repair state inspection method which can prevent.

  In the first invention of the present application, a belt-like opening having a predetermined width is formed on the inner side of the existing sash frame fixed to the opening of the housing and at least one of the front and back surfaces of the existing sash frame and the periphery thereof. In the repair method of the sash frame, in which the new sash frame is fitted and fixed in a state where the belt-shaped opening is sealed with a sealing material, the sealing material is removed and the inner peripheral surface of the existing sash frame and the new installation The space formed between the outer peripheral surfaces of the sash frame is exposed to the outside through the band-shaped opening, and then, a foamable resin is injected into the space from the band-shaped opening, and a part of the foamed resin layer is injected. After overflowing and curing from substantially the entire area of the belt-shaped opening, the overflow resin portion is cut off.

  In addition, as the foamable resin, a resin capable of foaming and curing a liquid resin raw material by a chemical reaction, such as a urethane resin, an epoxy resin, an acrylic resin, or an olefin resin, or a liquid resin raw material, A resin that can be cured while introducing bubbles such as nitrogen, LPG, or chlorofluorocarbon is preferred. In particular, a hard polyurethane resin which causes a chemical reaction by mixing two kinds of liquid resin raw materials and foams and cures is easy to handle and is more preferable because it has a high compressive strength after curing.

  In the second invention of the present application, in the repair method of the sash frame according to the first invention, when the foamable resin is injected into the space portion and foamed, the resin injection operation is performed in a plurality of times. By filling the foamed resin layer related to the subsequent resin injection on the foamed resin layer formed by the previous resin injection, the foamable resin is filled in almost the entire space, and the final injection is performed. A part of the foamed resin layer overflows from substantially the entire area of the band-shaped opening and is cured to form a cured resin layer in the space, and the overflowed resin part that has overflowed and hardened from the band-shaped opening is excised. It is characterized by doing.

  According to a third invention of the present application, in the sash frame repair method according to the first or second invention, between the inner peripheral surface of the opening of the housing and the outer peripheral surface of the existing sash frame facing the sash frame. A plurality of resin injection holes that are formed and communicate with the space extending in the circumferential direction are formed at predetermined intervals in the extending direction of the space portion on the side surface of the existing sash frame or the accessory member, and then the resin A resin-cured layer is formed in the space part by injecting a foamable resin into the space part from the injection hole and foaming and curing the resin.

  According to a fourth invention of the present application, in the sash frame repair method according to the third invention, the foaming resin injection operation into the space is performed in a plurality of times, and the resin injection hole is formed in the space. A plurality of resin injection holes are formed at predetermined intervals in the extending direction of the portion, and among the plurality of resin injection holes, an arbitrary resin injection hole is used as the first resin injection hole, and 2 in order from the side closer to the first resin injection hole The second resin injection hole, the third resin injection hole, and the fourth resin injection hole are formed, and a foamable resin is injected into the space portion from the first resin injection hole, and the second resin injection hole is expanded and expanded. The injection of the foamable resin is stopped to such an extent that a part of the foamed resin layer that is in the process of foaming overflows from the injection hole, and then the foamable resin is injected into the space from the third resin injection hole. Inflate and foam from the fourth resin injection hole The injection of the foamable resin is stopped to the extent that a part of the foamed resin layer overflows, and the above-mentioned space portion is filled with the foamable resin by repeating such stepwise foaming resin injection operation. Is cured to form a cured resin layer in the space, and the overflowed resin portion overflowing from the resin injection hole and cured is cut off.

  In a fifth invention of the present application, in the sash frame repairing method according to the first, second, third or fourth invention, prior to the injection of the foamable resin into the space portion, the existing sash frame and Form an appropriate number of drainage holes at appropriate locations in the new sash frame, drain water accumulated in the space through the drainage holes, and then inject foamable resin into the space to foam and cure it. It is characterized by.

  In the sixth invention of the present application, in the repair state inspection method for inspecting the repair state of the sash frame repaired by the sash frame repair method according to the first or second invention, the sash frame overflows outward from the belt-shaped opening. It is characterized in that the quality of the repaired state of the sash frame is inspected by observing the cross section of the resin formed by cutting out the overflowed resin part cured.

  In the seventh invention of the present application, in the repair state inspection method for inspecting the repair state of the sash frame repaired by the sash frame repair method according to the fourth invention, the resin overflows from the resin injection hole and hardens. It is characterized by inspecting the quality of the repaired state of the sash frame by observing the cross section of the resin formed by excising the overflow resin part.

(A) 1st invention of this application In 1st invention of this application, it is the inner periphery of the existing sash frame fixed to the opening part of the housing, and the periphery in at least any one side of both the front and back of this existing sash frame In a repair method for a sash frame, in which a new sash frame is fitted and fixed with a band-shaped opening having a predetermined width therebetween, and the band-shaped opening is sealed with a sealing material, the sealing material is removed and the existing sash frame is removed The space formed between the inner peripheral surface of the sash frame and the outer peripheral surface of the new sash frame is exposed to the outside through the band-shaped opening, and then the foamable resin is injected into the space from the band-shaped opening. The foamed resin layer overflows outward from substantially the entire area of the belt-shaped opening and is cured, and then the overflowed resin portion is cut out, so that the space is filled with the resin cured layer. And the space It is reliably prevented that water such as rainwater enters and accumulates in the interior, for example, the connecting tool for connecting the existing sash frame and the new sash frame is not corroded by the accumulated water. The fixing strength of the sash frame and the newly installed sash frame is maintained, and water contaminated with iron rust does not ooze out to prevent the surface of the casing from being soiled and maintain its aesthetics.

  In addition, since the inside of the space is filled with the resin cured layer, the rigidity of the resin cured layer reinforces the fixed state between the existing sash frame and the newly installed sash frame, and accordingly, the sash frame as a whole is reinforced. Fixing performance is improved.

  Furthermore, when the foamable resin expands and expands in the space, the air in the space is discharged from the band-shaped opening to the outside as the expansion of the foam expands, and is entrained and enclosed in the foamed resin layer. Is prevented. Therefore, it is reliably prevented that an air pocket is generated in the foamed resin layer in the space, and that a cavity that causes rain leakage and condensation is generated in the cured resin layer due to the air pool. As a result, for example, rainwater that has entered the space or water due to condensation can be reliably prevented from entering the room through the cavity.

  Moreover, in the sash frame after repair, since the overflow resin part which overflowed outward from the said strip | belt-shaped opening is cut off, the aesthetics around a sash frame are maintained.

(B) Second invention of the present application In the second invention of the present application, in addition to the effects described in (a) above, the following specific effects are obtained. That is, according to the present invention, when the foamable resin is injected into the space portion and foamed, the resin injection operation is performed in a plurality of times, and on the foamed resin layer formed by the previous resin injection, The foamed resin layer related to the injection of the resin is sequentially stacked and filled with the foamable resin over substantially the entire area of the space, and a part of the foamed resin layer by the final injection is outward from the substantially entire area of the band-shaped opening. The cured resin layer is formed in the space portion by overflowing and cured, and the overflowed resin portion overflowing and cured from the band-shaped opening is excised, so that the foamed resin layer is formed in the space portion. It will be formed in multiple layers in the thickness direction of the space, and even if any of these multi-layer foamed resin layers have air retention or poor curing, other foamed resin layers other than this No air traps or poor curing If normal foam resin layer, the normal sealing of sash frame fixing portion is secured by the foamed resin layer, without dripping or condensation reliable sash frame is obtained.

  In addition, since the overflowing resin portion that has overflowed from the band-shaped opening and hardened out of the foamable resin layer by the final resin injection is cut off, the aesthetics of the band-shaped opening portion can be maintained, and afterwards When the band-shaped openings are sealed with a sealing material, the sealing performance of the band-shaped openings is maintained well.

(C) Third invention of the present application In the third invention of the present application, in addition to the effects described in the above (a) or (b), the following specific effects can be obtained. That is, in the present invention, the resin injection hole that is formed between the inner peripheral surface of the opening of the housing and the outer peripheral surface of the existing sash frame that faces the opening and communicates with the space extending in the circumferential direction, A plurality of the sash frame or its attached members are formed at a predetermined interval in the extending direction of the space portion, and then a foamable resin is injected into the space portion from the resin injection hole and is foam-cured. In this way, the cured resin layer is formed in the space portion, so that the space portion is filled with the cured resin layer, and it is reliably prevented that water such as rainwater enters and accumulates in the space portion. For example, the connecting member that connects the inner peripheral surface of the opening and the existing sash frame is not corroded by the accumulated water, the fixing performance of the housing and the existing sash frame is maintained, and iron rust is not generated. The mixed water oozes out It without fouling the building frame surface is prevented.

  In addition, since the inside of the space is filled with the resin hardened layer, the rigidity of the resin hardened layer reinforces the fixing state between the housing and the existing sash frame. Performance is enhanced.

  Furthermore, when the foamable resin expands and expands in the space and sequentially diffuses into the space, the air in the space is gradually pushed forward in the expansion direction of the foamable resin, and a plurality of the air is formed. Since the resin is discharged from the resin injection hole to the outside, air is trapped in the foamable resin and becomes an air reservoir, which may remain as a cavity that causes rain leakage and condensation after the foamable resin is cured. As a result, for example, rainwater that has entered the space or water due to condensation is reliably prevented from entering the room through the cavity.

(D) Fourth invention of the present application In the fourth invention of the present application, in addition to the effect described in the above (c), the following specific effects are obtained. That is, in the present invention, the foaming resin is injected into the space part in a plurality of times, and a plurality of the resin injection holes are formed at predetermined intervals in the extending direction of the space part. Among these resin injection holes, an arbitrary resin injection hole is used as the first resin injection hole, and the second resin injection hole, the third resin injection hole, the fourth resin injection hole are sequentially arranged from the side closer to the first resin injection hole. As the resin injection hole, a foamable resin is injected into the space from the first resin injection hole, and this expands and expands, and a part of the foamed resin layer in the process of foaming overflows from the second resin injection hole. Then, the injection of the foamable resin is stopped, and then the foamable resin is injected into the space portion from the third resin injection hole to expand and expand, and the foaming in the process of foaming from the fourth resin injection hole. To the extent that part of the resin layer overflows The injection of the functional resin is stopped, and by repeating the stepwise injection of the foamable resin, the foamable resin is filled in the space portion and cured to form a cured resin layer in the space portion. The overflow resin portion that has overflowed and hardened from the resin injection hole is excised.

  Therefore, in the space portion, the foamed resin layer that is injected later and expanded by foaming is sequentially laminated on the front side in the expansion direction of the foamed resin layer that has been injected and expanded, so that the air in the space portion is It is reliably prevented that the air pool is generated by being caught in the foamed resin layer, and that the air pool remains as a cavity that causes rain leakage or condensation in the cured resin layer after curing.

  In addition, when the foaming resin is injected, a part of the foamed resin layer overflowing from the other resin injection holes located on the front side in the expansion direction of the foam from the resin injection holes currently used for the injection operation overflows. It is possible to confirm that the foamable resin is sufficiently filled up to the other resin injection holes by visually observing that the foaming resin is insufficient or the foamable resin is foamed. Insufficient filling of foamable resin due to shortage, etc. is reliably prevented, so that the fixing performance of the existing sash frame and the new sash frame can be maintained well, and the foaming resin can be easily injected. Therefore, reduction in work cost is promoted.

(E) Fifth invention of the present application In the fifth invention of the present application, in addition to the effects described in (a), (b), (c) or (d), the following specific effects are obtained. . That is, in the present invention, prior to the injection of the foamable resin into the space portion, an appropriate number of water drain holes are formed at appropriate positions in the existing sash frame and the new sash frame, and the water holes are inserted into the space portion through the water drain holes. The accumulated water is drained, and then the foamable resin is injected into the space to be cured by foaming. Therefore, the foaming expansion of the foamable resin is performed in the space where there is no water pool. .

  Here, since the foamable resin has a property of easily causing foaming failure or curing failure when touched with water, if water is accumulated in the space portion, the foamed resin is foamed in the portion where the water is accumulated. A void is generated due to poor foaming or curing of the conductive resin, and this remains as a cavity in the cured resin layer. Even if the foamable resin does not cause poor foaming or poor curing, since water is an incompressible fluid, if water accumulates in the space, it is injected into the space. Even if the foamable resin expands and expands, the water reservoir portion is not filled, and this portion remains as a cavity (after evaporation of water) in the cured resin layer in the space portion. The cavities remaining in these cured resin layers impair the mounting strength of the existing sash frame and the new sash frame, or rainwater or the like enters the cavity after the sash frame repair work is completed, and the surface of the housing is soiled. In the repair method of the present invention, since there is no water pool in the space portion as described above, the occurrence of such a situation is prevented in advance and a highly reliable sash is obtained. A frame can be obtained.

(F) 6th invention of this application In 6th invention of this application, in the repair condition inspection method which inspects the repair condition of the sash frame repaired by the repair method of the sash frame which concerns on the said 1st or 2nd invention, The sash frame repair state of the sash frame is inspected by observing the cross section of the resin formed by cutting out the overflowed resin portion that has overflowed outward from the belt-shaped opening, and the resin in the space portion. It is possible to detect with a high probability the occurrence of poor curing caused by a relatively deep portion of the hardened layer or the occurrence of cavities due to air accumulation, and the inspection accuracy and reliability by visual inspection is improved. This also ensures the reliability of the repaired part of the sash frame, and if inspection results in poor curing or air pockets or cavities, measures such as reworking or partial repairs. Can be done quickly.

(G) Seventh invention of the present application In the seventh invention of the present application, in the repair state inspection method for inspecting the repair state of the sash frame repaired by the sash frame repair method according to the fourth invention, the resin injection Since the sash frame is inspected for quality by observing the cross section of the resin formed by cutting out the overflowed resin portion that has overflowed and hardened from the hole, the cured resin layer in the space It is possible to detect the occurrence of a hardening defect occurring in a relatively deep part of the cavities and the generation of cavities due to air accumulation with high probability, and the inspection accuracy and reliability by visual inspection are improved. This also ensures the reliability of the repaired part of the sash frame, and if inspection results in poor curing or air pockets or cavities, measures such as reworking or partial repairs. Can be done quickly.

It is a perspective view which shows the state of the repair work performed by applying the repair method of the sash frame which concerns on 2nd Embodiment of this invention. FIG. 2 is an enlarged cross-sectional view of FIG. 1 and shows a state before a resin injection operation. FIG. 2 is an enlarged cross-sectional view of FIG. 1 and shows a state after completion of a resin injection operation. FIG. 4 is a view taken from a knee arrow in FIG. 3. It is sectional drawing which shows an example of the conventional "covering method" which attached the newly installed sash frame inside the existing sash frame.

B: Embodiment In FIG. 1, a sash frame portion to be repaired by applying a repair method according to an embodiment of the present invention, that is, a window or door attached from the beginning in an opening 2 provided in a housing 1. Inside the existing sash frame 3, a sash frame portion formed by fitting and fixing a new sash frame 4 having a shape smaller than that of the existing sash frame 3 by the “covering method” is shown.

B-1: Specific Structures of Existing Sash Frame 3 and New Sash Frame 4 As shown in FIG. 2, the existing sash frame 3 is fitted into the opening 2 of the housing 1 and an appropriate fixture ( And is fixed to the housing 1 side. The existing sash frame 3 includes a pair of rectangular side walls 3a and 3a facing each other with a predetermined dimension, and a peripheral wall 3b connecting the pair of side walls 3a and 3a. The peripheral wall 3b is formed over the entire circumference of the side wall 3a at a position displaced from the outer peripheral end of the side wall 3a toward the frame center by a predetermined dimension. In addition, the part corresponding to the lower surface of the said existing sash frame 3 among the said surrounding walls 3b is formed so that it may descent | fall downward from the indoor side toward the outdoor side in consideration of drainage.

  When the existing sash frame 3 is fixed to the housing 1, the outer peripheral ends on the upper surface side and the left and right sides of the side wall 3 d of the existing sash frame 3 are the inner peripheral upper surface 2 a and the inner peripheral side surface of the opening 2, respectively. The outer peripheral end on the lower surface side is placed on the inner peripheral lower surface 2 b of the opening 2 via the frame mounting seat 5.

  Therefore, in this fixed state, a space portion 21 having a flat rectangular cross-sectional shape is formed between the inner peripheral upper surface 2 a and inner peripheral side surface 2 c of the opening 2 and the peripheral wall 3 b of the existing sash frame 3. . On the other hand, a space 21 having a substantially trapezoidal cross-sectional shape is formed between the frame mounting seat 5 and the peripheral wall 3b of the existing sash frame 3. The space 21 is continuous over the entire circumference of the existing sash frame 3.

  On the other hand, the new sash frame 4 is fitted and fixed to the inside of the existing sash frame 3 by the “covering method”, and the shape thereof is a predetermined dimension than the inner peripheral shape of the existing sash frame 3. A belt-like opening 14 having a predetermined width is formed between the outer peripheral edge of the side wall 4 a and the inner peripheral edge of the side wall of the existing sash frame 3 on the indoor side of the new sash frame 4. On the outer side, a belt-like opening 15 having a predetermined width is formed between the outer peripheral edge of the side wall 4a of the new sash frame 4 and the inner peripheral edge of the side wall 3a of the existing sash frame 3. Further, between the peripheral wall 4b of the new sash frame 4 and the peripheral wall 3b of the existing sash frame 3, the sash frames 3 and 4 are continuous in the extending direction, and the band-shaped opening 14 and the band-shaped opening 15 are interposed therebetween. Thus, a space 22 is formed to open to the outside.

  In addition, the peripheral wall 4b of the new sash frame 4 is inclined downward from the indoor side to the outdoor side in consideration of drainage at the lower side, in the same manner as the peripheral wall 3b of the existing sash frame 3. . Moreover, the said strip | belt-shaped opening 14 and the strip | belt-shaped opening 15 are obstruct | occluded by the sealing materials 7 and 8 which can be attached or detached, respectively.

  Further, the existing sash frame 3 and the new sash frame 4 are fixed at a predetermined relative position by a plurality of connectors 6 provided at predetermined intervals (for example, about 400 mm) in the longitudinal direction (extending direction). ing. In this embodiment, the connector 6 is composed of a rod body having a predetermined length and a pair of flat plate bodies 6a that are welded and fixed to both ends thereof. The peripheral wall 3b of the existing sash frame 3 and the peripheral wall 4b of the new sash frame 4 are fixed with screws. Then, after fitting the new sash frame 4 inside the existing sash frame 3, the connector 6 is inserted into the space portion 22 from the belt-like opening 14 or the belt-like opening 15, and both ends thereof are respectively connected to the flat plate. The new sash frame 4 is fixed to the existing sash frame 3 by welding them to the body 6a and integrating them. Further, in FIG. 6, reference numeral 9 denotes a fitting that is attached to the inside of the new sash frame 4.

B-2: Preparatory work before injection of foamable resin B-2-1: Preparatory work for the existing sash frame 3 For the existing sash frame 3, an inner peripheral upper surface 2a of the opening 2 on the side of the housing 1 In the present embodiment, the draining operation of the water accumulated in the space portion 21 formed between and the operation of forming the resin injection hole 31 for injecting the resin into the space portion 21 is performed. When the resin injection hole 31 is formed in the side wall 3a of the existing sash frame 3, the resin injection hole 31 is also used as a drain hole by setting the formation position in the vertical direction to a position directly above the peripheral wall 3b. Therefore, there is no dedicated drain hole.

  As shown in FIGS. 1 and 2, the resin injection hole 31 includes three portions excluding the bottom of the indoor side wall 3a extending in a rectangular frame shape over the entire circumference of the existing sash frame 3, Formed on the side surface of the frame mounting seat 5 arranged at the bottom of the existing sash frame 3 at predetermined intervals in the longitudinal direction (extension direction). Here, the size and shape of the resin injection hole 31 is preferably a circular hole having a diameter of about 5 to 30 mm or a rectangular hole having a side of about 5 to 30 mm. The formation interval of the resin injection holes 31 is preferably about 50 to 200 mm.

  Among the resin injection holes 31 formed in this way, a plurality of resin injection holes 31 provided on the upper surface side of the existing sash frame 3 and a plurality of resin injection holes 31 provided in the frame mounting seat 5. However, it functions as a water drainage hole, and the water accumulated in the space portion 21 and the water accumulated in the frame mounting seat 5 are quickly discharged, whereby the space portion 21 is subsequently discharged into the space portion 21. In the resin injecting operation of the foamable resin, inconvenience due to the water accumulated in the space 21 is prevented in advance.

  That is, since the foamable resin has a property of easily causing foaming failure or curing failure when touched with water, if water is accumulated in the space portion 21, in the portion where the water is accumulated. A void is generated due to poor foaming or poor curing of the foamable resin, and this remains as a cavity in the cured resin layer. Further, even when the foamable resin does not cause poor foaming or poor curing, water is an incompressible fluid. Even if the foamable resin injected into the foam expands, the water reservoir portion is not filled, and this portion remains as a cavity (after water has evaporated) in the cured resin layer in the space. . The cavity remaining in the cured resin layer impairs the fixing strength of the existing sash frame 3 with respect to the opening 2, or rainwater or the like enters the cavity after the repair work of the sash frame is completed, and the surface of the housing However, these are all eliminated.

B-2-2: Preparatory work for the new sash frame 4 On the other hand, in the new sash frame 4, the band-shaped opening 14 is used as a resin injection hole as will be described later, and therefore no dedicated resin injection hole is provided. Only the drainage hole 33 is formed. That is, in this embodiment, as shown in FIGS. 1 and 2, the drainage hole 33 is formed only in the upper edge of the new sash frame 4, and the formation position thereof is the peripheral wall 4b in the indoor side wall 4a. A plurality of positions are formed at predetermined intervals in the longitudinal direction. The drain hole 33 is preferably a circular hole having a diameter of about 5 to 30 mm, or a rectangular hole having a side of about 5 to 30 mm, like the resin injection hole 31 on the existing sash frame 3 side. The formation interval is preferably about 50 to 200 mm.

  As described above, even if water has accumulated in the space portion 22 at the start of repair of the sash frame, the water accumulated on the upper side of the peripheral wall 4b of the new sash frame 4 is formed by the formation of the drain hole 33. It is quickly discharged to the outside through the drain hole 33. Further, water collected on the upper surface of the peripheral wall 3b of the existing sash frame 3 on the lower surface side of the new sash frame 4 is discharged to the outside by removing the sealing material 8. As a result, in the same way as the drainage effect on the existing sash frame 3 side, the inconvenience due to the water accumulated in the space 22 is also eliminated on the new sash frame 4 side. Therefore, the cured resin layer 12 can be formed in an appropriate state in the space 22, and the fixed state between the existing sash frame 3 and the newly installed sash frame 4 is reinforced by the rigidity of the cured resin layer 12. The occurrence of contamination on the surface of the casing 1 is prevented in advance.

B-3: Injecting operation of expandable resin When the above-described preparation operation is completed, the injecting operation of the expandable resin described below is performed.

  The space portion 21 formed between the housing 1 and the existing sash frame 3 is injected with a foamable resin through the plurality of resin injection holes 31 provided in the existing sash frame 3. Injection of the foamable resin into the portion 21 is performed mainly for the purpose of preventing water from entering between the housing 1 and the existing sash frame 3 or reinforcing the existing sash frame 3 with respect to the housing 1. . In addition, a foaming resin is injected into the space 22 formed between the existing sash frame 3 and the new sash frame 4 through the band-shaped opening 14. The injection is mainly performed for the purpose of preventing water from entering between the existing sash frame 3 and the new sash frame 4 or reinforcing the fixed state of the existing sash frame 3 and the new sash frame 4.

  B-3-1: Injection of foamable resin into the space 21

  Although it is possible to complete the injection of the foamable resin into the space portion 21 in a single injection operation, in this embodiment, the cavity of the resin cured layer 11 formed in the space portion 21 is not affected. From the viewpoint of preventing the remaining, etc., the foamable resin is injected into the space portion 21 in a plurality of times by a predetermined amount. Here, for convenience of explanation, among the resin injection holes 31 formed in plural in the longitudinal direction of the existing sash frame 3 at a predetermined interval, the first resin injection hole for initially injecting any one of the resin injection holes 31 It is temporarily called 31. Further, the first resin injection hole 31 is tentatively referred to as a second resin injection hole, a third resin injection hole, and a fourth resin injection hole in order of increasing distance in one direction.

  First, an injection gun (not shown) is inserted into the space portion 21 from the first resin injection hole 31 to inject foamable resin into the space portion 21. The injected foamable resin diffuses and moves forward while foaming and expanding in the space 21, and when this reaches the second resin injection hole 31, a part of the foamed resin layer in the process of foaming becomes the second resin. It overflows from the injection hole 31 to the outside. When the overflow amount reaches a predetermined amount, the foaming resin injection operation from the first resin injection hole 31 is stopped.

  Next, an injection gun is inserted into the third resin injection hole 31 which is one forward of the second resin injection hole 31 to inject a foamable resin into the space portion 21, and the fourth resin injection hole When a predetermined amount of the foamed resin layer that is in the process of foaming from 31 overflows a predetermined amount, the operation of injecting the foamable resin from the third resin injection hole 31 is stopped. By repeating the injection of the foamable resin in order, the cured resin layer 11 formed by curing the foamed and expanded foamable resin in the space 21 as shown in FIGS. 7 and 8. However, it will be formed in a multilayer shape in the foam expansion direction. That is, as shown in FIG. 8 for convenience, the first resin cured layer 11A, the second resin cured layer 11B, the third resin cured layer 11C,... .

  A part of the foamed resin layer in the process of foaming overflows from each resin injection hole 31 to the outside and hardens as the foamable resin injected into the space 21 from each resin injection hole 31 expands. The overflow resin portion is excised after completion of the work, and the excised surface is used for a fixed state inspection as will be described later.

  As described above, the foamable resin is injected into the space portion 21 formed between the opening 2 of the housing 1 and the existing sash frame 3 fixed thereto, and this space is expanded and expanded. By forming the resin cured layer 11 in the space 21, the space 21 is filled with the resin cured layer 11, so that water such as rainwater enters the space 21 and accumulates therein. Is reliably prevented.

  Further, when the foamable resin expands and expands in the space portion 21 and sequentially diffuses and moves into the space portion 21, the air in the space portion 21 is gradually pushed forward in the expansion direction of the foamable resin. Since a plurality of the resin injection holes 31 are discharged to the outside, the air is entrained in the foamable resin and becomes an air reservoir, which remains as a cavity after the foamable resin is cured. Is prevented. As a result, for example, it is possible to reliably prevent rainwater that has entered the space 21 or water due to condensation from entering the room through the cavity.

  On the other hand, in this embodiment, the foaming resin is injected into the space portion 21 stepwise through the resin injection holes 31 provided in the existing sash frame 3 at a predetermined interval. Therefore, in the space portion 21, the foamed resin layer injected later and expanded by foaming is sequentially laminated on the front side in the expansion direction of the foamed resin layer previously injected and expanded. The air is trapped in the foamable resin to generate an air pocket, and the air pool is more reliably prevented from remaining as a cavity in the cured resin layer 12.

  In this embodiment, the formation interval of the resin injection holes 31 provided in the new sash frame 3 is set in the range of 50 to 200 mm. However, if this interval becomes too large, When the foamable resin is foamed, the air in the space 21 loses the escape space and is compressed with the expansion change of the foamable resin, and an air pool with a high internal pressure is easily generated in the foamed resin layer. It is not preferable. On the other hand, if the distance is too small, the rigidity of the existing sash frame 3 may be impaired, and the strength performance may be lowered. From this point of view, the formation interval of the resin injection holes 31 is set in the range of “50 to 200 mm” as described above.

  In addition, when the foaming resin is injected, a part of the foamed resin layer that is in the process of being foamed from another resin injection hole 31 that is located in front of the resin injection hole 31 that is currently used for the injection operation in the expansion direction of foaming. It is possible to confirm that the foamable resin is sufficiently filled up to the other resin injection hole 31 by visually observing that the resin overflows. Filling failure of the foamable resin due to insufficient foaming of the resin, etc. is surely prevented, so that the fixing strength of the casing 1 and the existing sash frame 3 is maintained well, and the foaming resin injection operation is performed. This facilitates the reduction of work costs.

  In addition, as the foamable resin, a resin capable of foaming and curing a liquid resin raw material by a chemical reaction, such as a urethane resin, an epoxy resin, an acrylic resin, or an olefin resin, or a liquid resin raw material, A resin that can be cured while introducing bubbles such as nitrogen, LPG, or chlorofluorocarbon is preferred. In particular, a hard polyurethane resin which causes a chemical reaction by mixing two kinds of liquid resin raw materials and foams and cures is easy to handle and is more preferable because it has a high compressive strength after curing.

B-3-2: Injection operation of foamable resin into the space portion 22 The injection operation of foamable resin into the space portion 22 is performed by inserting an injection gun into the space portion 22 through the band-shaped opening 14. This is performed by injecting a foamable resin into the space 22. In this case, it is possible to adopt a method of injecting an amount of foamable resin corresponding to the volume of the space portion 22 at a time by one injection operation to complete the operation. While preventing the entrainment of air into the foamable resin injected into the portion 22, the effect of preventing water from entering the space portion 22 by the cured resin layer 12 obtained by curing the foamable resin is further ensured. From such a viewpoint, the injection operation is divided into a plurality of times (in this embodiment, three times) and is performed stepwise.

  First, as shown in FIG. 2, the strip-shaped opening 15 on the outdoor side is sealed with the sealing material 8, while the strip-shaped opening 14 on the indoor side is opened by removing the sealing material 7. In this state, an injection gun is inserted from the strip-shaped opening 14 into the inner part of the space portion 22, and the foamable resin is filled with the assumed amount of the foamable resin (filling the space portion 22 and its An amount of about 1/3 of the amount of the foamable resin sufficient to overflow a part from the belt-shaped opening 14 is injected into the space 22 and expanded and expanded.

  In this case, in the space portion 22, the strip-shaped opening 15 on the outdoor side is sealed by the sealing material 8, and the strip-shaped opening 14 on the indoor side is open to the outside. When the injected foamable resin expands by foaming and diffuses and moves to the inner part of the space portion 22 to form a foamed resin layer, the air in the space portion 22 is expanded with the expansion of the foamable resin. Then, it is moved toward the band-shaped opening 14 which is gradually opened. As a result, it is reliably prevented that air is entrained in the foamed resin layer that is in the process of foaming and forms an air pocket here, and is also caused by the air pool in the cured resin layer 12 after being cured. The formation of cavities is prevented. The cured resin layer 12 obtained by this first resin injection is the first cured resin layer formed in the inner part of the space 22 as indicated by reference numeral 12A in FIG.

  Next, a second cured resin layer 12B is formed so as to overlap the upper side of the first cured resin layer 12A (that is, close to the band-shaped opening 14). That is, after the first cured resin layer 12A is cured to some extent, an injection gun is again inserted into the space portion 22 from the side of the band-shaped opening 14, and the required amount (approximately 1 / of the total usage amount) is inserted into the space portion 22. A foamable resin in an amount of about 3) is injected and expanded.

  In this case, the newly injected foamable resin starts to foam in a state of being in close contact with the surface of the first resin cured layer 12A, and expands and moves toward the band-shaped opening 14 side. A new cured resin layer 12, that is, a second cured resin layer 12B is formed on the surface of the cured resin layer 12A (see FIG. 3). In the process of forming the second cured resin layer 12B, the surrounding air moves to the open side of the band-shaped opening 14 with the expansion of the foamable resin, and the foamed resin layer is in the process of expanding the foam. It is reliably prevented from being caught in the air and forming an air pocket.

  Next, the third cured resin layer 12C is formed so as to overlap the upper side of the second cured resin layer 12B (that is, near the belt-shaped opening 14). That is, after the second cured resin layer 12B is cured to some extent, an injection gun is again inserted into the space portion 22 from the side of the band-shaped opening 14 and the required amount (approximately 1 / of the total usage amount) is inserted into the space portion 22. A foamable resin of an amount of about 3) is injected and foamed and expanded.

  In this case, the newly injected foamable resin starts to foam in a state of being in close contact with the surface of the second resin cured layer 12B, and expands and moves toward the band-shaped opening 14 side. A new cured resin layer 12, that is, a third cured resin layer 12C is formed on the surface of the cured resin layer 12B (see FIG. 3). In the process of forming the third resin cured layer 12C, the surrounding air moves to the open band-shaped opening 14 side with the expansion of the foamable resin, and the inside of the foamed resin layer in the middle of the expansion of the foam It is reliably prevented from being caught in the air and forming an air pocket.

  Further, as the final stage of expansion of the foamable resin, a part of the foamed resin layer that is in the process of foaming overflows from the band-shaped opening 14 to the outside and is cured here to become the overflow resin portion 13. By cutting off the overflow resin portion 13, three layers of cured resin layers 12A, 12B, and 12C that are in close contact with each other are formed in the space portion 22, as shown in FIG.

  As described above, the foamable resin is injected into the space portion 22 formed between the existing sash frame 3 and the new sash frame 4, and the resin is cured by foaming and expanding the resin. By forming the layer 12, the space 22 is filled with the resin cured layer 12, so that it is reliably prevented that water such as rainwater enters and accumulates in the space 22. The

  In addition, for example, even in the case where an air pocket or a curing failure occurs due to some cause in any of the multilayer resin cured layers 12A, 12B, 12C constituting the resin cured layer 12, If the other cured resin layers 12A, 12B, and 12C are normal foamed resin layers that do not retain air or cure poorly, the normal resin cured layers 12A, 12B, and 12C can cause water to enter the space 22. Therefore, a highly reliable sash frame can be obtained.

B-3-3: Inspection of repaired state of sash frame As described above, after completion of the operation of injecting the foamable resin into the space portion 21, a part of the foamed resin layer overflows from each of the resin injection holes 31. The overflow resin portion formed by curing is excised, and after the operation of injecting the foamable resin into the space portion 22 is completed, a part of the foam resin layer overflows from substantially the entire area of the strip opening 14 to the outside. The overflow resin portion formed by curing is excised, and by thus excising each overflow resin portion, the resin cross section of the resin cured layer 11 on the space portion 21 side and the resin on the space portion 22 side are cut. The resin cross section of the hardened layer 12 is exposed to the outside.

  Therefore, the quality of the repaired state of the sash frame can be inspected by observing these resin cross sections. That is, it is possible to detect with high probability the occurrence of curing defects occurring in relatively deep portions of the resin cured layers 11 and 12 in the space portions 21 and 22 and the occurrence of cavities due to air pockets. Inspection accuracy and reliability are improved. This also ensures the reliability of the repair for the existing sash frame 3 and the new sash frame 4, and if inspection results in poor curing, air pockets or cavities, re-execution or partial repair. It is possible to quickly take countermeasures such as repairs.

  In this embodiment, the dimension of the resin injection hole 31 is set to 5 to 30 mm in diameter when the resin injection hole 31 is a circular hole, and one side is 5 when the resin injection hole 31 is a rectangular hole. However, if the dimension of the resin injection hole 31 is made too small, the cross section of the resin when the overflow resin part is excised becomes small and observation becomes difficult. On the other hand, if the size is too large, the rigidity of the new sash frame 4 may be impaired, and the strength performance may be lowered.

  The sash frame repair method and repair state inspection method according to the present invention are used in a sash frame remodeling operation.

DESCRIPTION OF SYMBOLS 1 .... Housing 2 ... Opening 3 ... Existing sash frame 4 ... New sash frame 5 ... Frame mounting seat 6 ... Connecting tool 7 ... Sealing material 8 ... Sealing material 9 ... Joining tool 11 ... Resin Hardened layer 12 ·· Resin hardened layer 14 ·· Strip opening 15 ·· Strip opening 21 ·· Space portion 22 ·· Space portion 31 ·· Resin injection hole 33 ·· Water drain hole

Claims (7)

The new sash frame is fitted inside the existing sash frame fixed to the opening of the housing in a state where a belt-like opening having a predetermined width is formed between the peripheral edge of at least one of the front and back surfaces of the existing sash frame. A method for repairing a sash frame formed by sealing and fixing the belt-shaped opening with a sealing material,
The sealing material is removed and the space formed between the inner peripheral surface of the existing sash frame and the outer peripheral surface of the new sash frame is exposed to the outside through the band-shaped opening,
Thereafter, a foamable resin is injected into the space from the belt-shaped opening, and a part of the foamed resin layer is allowed to overflow outward from substantially the entire area of the belt-shaped opening to be cured, and then the overflow resin portion is removed. A method for repairing a sash frame characterized by that. In claim 1,
When injecting a foamable resin into the space and foaming, the resin injection operation is performed in a plurality of times,
By filling the foamed resin layer related to the subsequent resin injection on the foamed resin layer formed by the previous resin injection, the foamable resin is filled in almost the entire space, and the final injection is performed. A part of the foamed resin layer overflows from almost the entire area of the band-shaped opening and is cured to form a cured resin layer in the space, and the overflowed resin part that has overflowed and hardened from the band-shaped opening is cut off. A method for repairing a sash frame, characterized by: In claim 1 or 2,
A resin injection hole that is formed between the inner peripheral surface of the opening of the housing and the outer peripheral surface of the existing sash frame that faces the opening and communicates with the space extending in the circumferential direction is provided with the existing sash frame or its accessory. A plurality of side surfaces of the member are formed at predetermined intervals in the extending direction of the space portion,
Thereafter, a sash frame repairing method is characterized in that a foamed resin is injected into the space through the resin injection hole and foamed and cured to form a cured resin layer in the space. In claim 3,
The injection of foamable resin into the space is to be performed multiple times,
A plurality of the resin injection holes are formed at predetermined intervals in the extending direction of the space part,
Among the plurality of resin injection holes, an arbitrary resin injection hole is used as a first resin injection hole, and a second resin injection hole, a third resin injection hole, 4 from the side closer to the first resin injection hole, 4 The second resin injection hole,
The foamable resin is injected to the extent that the foamable resin is injected into the space from the first resin injection hole and expanded, and a part of the foamed resin layer in the process of foaming overflows from the second resin injection hole. Stop the injection of
Next, a foamable resin is injected into the space from the third resin injection hole and expanded, and foaming is performed to such an extent that a part of the foamed resin layer overflowing from the fourth resin injection hole overflows. The injection of functional resin shall be stopped,
By repeating such stepwise injecting operation of the foamable resin, the space portion is filled with the foamable resin and cured to form a cured resin layer in the space portion, and overflowed from the resin injection hole and cured. A method for repairing a sash frame, characterized by cutting out the overflowed resin portion. In claim 1, 2, 3 or 4,
Prior to the injection of the foamable resin into the space, an appropriate number of water drainage holes are formed at appropriate positions in the existing sash frame and the new sash frame, and water accumulated in the space is drawn through the water drainage holes. Thereafter, a method for repairing a sash frame, comprising injecting a foamable resin into the space and foam-curing the resin. A repair state inspection method for inspecting a repair state of a sash frame repaired by the sash frame repair method according to claim 1 or 2,
A repair state inspection method for inspecting the quality of a repair state of a sash frame by observing a cross section of a resin formed by cutting out an overflow resin portion that has overflowed outward from the belt-shaped opening and has been cured. A repair state inspection method for inspecting a repair state of a sash frame repaired by the sash frame repair method according to claim 4,
A repair state inspection method for inspecting the quality of a repaired state of a sash frame by observing a cross section of a resin formed by cutting out an overflowed resin portion that has overflowed and cured from the resin injection hole.

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