JP2018031154A - 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 plurality of resin injection holes 32 is formed at a prescribed interval on a side surface of either of the sash frames 3, 4, the resin injection hole communicating with 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 extending in a circumferential direction, and then, a resin hardening layer is formed in the space by injecting a foaming resin into the space 22 from the resin injection hole 32 and having the resin foamed and hardened.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 is impaired due to corrosion, or that the water W contaminated by the mixing of iron rust oozes out to the surface side of the housing 1 and stains 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 into each of the space portions 21 and 22 and cured, and the space portions 21 and 22 are filled with a resin hardened layer. It is conceivable to prevent the intrusion of water into the parts 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, the new sash frame is fitted and fixed inside the existing sash frame fixed to the opening of the housing in a state of being in close proximity or close to the periphery of the existing sash frame. In the repair method of the sash frame, a resin injection hole that is formed between the inner peripheral surface of the existing sash frame and the outer peripheral surface of the new sash frame and communicates from the outside to a space extending in the circumferential direction is provided. And at least one side surface of the new sash frame is 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. A resin cured layer is formed in the space by foaming and curing.

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

  According to a second invention of the present application, in the sash frame repair method according to the first invention, the foaming resin is injected into the space part 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 these 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, and the overflowed resin portion overflowing from the resin injection hole and cured is cut off.

  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 second or fourth invention, the resin overflows from the resin injection hole to the outside. 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.

(A) 1st invention of this application According to the repair method of the sash frame which concerns on 1st invention of this application, with respect to the periphery of this existing sash frame inside the existing sash frame fixed to the opening part of a housing In a repair method of a sash frame that is fitted and fixed in a close or close state, the circumferential direction formed between the inner peripheral surface of the existing sash frame and the outer peripheral surface of the new sash frame A plurality of resin injection holes communicating from the outside to the space portion extending to the existing sash frame and the side surface of the new sash frame at predetermined intervals in the extending direction of the space portion, and then, Since the resin cured layer is formed in the space by injecting a foamable resin into the space through the resin injection hole and foaming and curing the resin, the space is filled with the resin cured layer. And water such as rainwater in the space For example, the existing sash frame and the new sash frame can be prevented from being corroded by the water accumulated in the connector for connecting the existing sash frame and the new sash frame. In addition to maintaining the fixed state, water contaminated with iron rust does not ooze out and the surface of the housing is prevented from being soiled and its aesthetics are maintained.

  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 portion and sequentially diffuses and moves in the space portion, the air in the space portion is gradually pushed to the front side in the expansion direction of the foamable resin, and a plurality of them are formed. Since the air is discharged from the resin injection hole to the outside, air is trapped in the foamable resin and becomes an air reservoir, and this does not remain as a cavity that causes rain leakage or condensation after the foamable resin is cured. Thus, it is possible to reliably prevent rainwater that has entered the space or water due to condensation from entering the room through the cavity.

(B) 2nd invention of this application According to the repair method of the sash frame which concerns on 2nd invention of this application, in addition to the effect as described in said (a), the following specific effects are acquired. 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 expandable resin is to be stopped, and by repeating the stepwise injection of the expandable resin, the expandable resin is filled in the space and cured to form a cured resin layer, and the resin injection The overflowed resin portion that has overflowed and hardened from the hole is cut off.

  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 this air pool remains as a cavity that causes rain leakage and condensation in the resin cured layer after curing. It is more reliably prevented that rainwater that has entered the section or water due to condensation enters the room through the cavity.

  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. The filling failure of the foamable resin due to the shortage or the like is surely prevented, and the work cost can be reduced by facilitating the foaming resin injection operation.

  Further, in the sash frame after the repair, the overflowed resin portion that has overflowed and hardened from the resin injection hole is removed, so that the aesthetic appearance around the sash frame is maintained.

(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.

  Further, in the case where the foamable resin expands and expands in the space portion and sequentially diffuses into the space portion, the air in the space portion is gradually pushed forward in the expansion direction of the foamable resin, and a plurality of the resin 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, according to the present invention, prior to the injection of the foamable resin into the space, an appropriate number of drain holes are formed at appropriate positions in the existing sash frame and the new sash frame, and the water is accumulated in the space through the drain hole. Since the water is extracted and then the foamable resin is injected into the space to be foamed and hardened, 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 the water has evaporated) 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 frame Can be obtained.

(F) 6th invention of this application In 6th invention of this application, the repair state inspection method which test | inspects the repair state of the sash frame repaired with the repair method of the sash frame which concerns on the said 2nd or 4th invention. In the above-mentioned space, the sash frame is inspected for quality by observing the resin cross section formed by cutting out the cured resin portion overflowing from the resin injection hole to the outside. It is possible to detect with high probability the occurrence of poor curing caused by a relatively deep part of the resin cured layer in the part or the occurrence of voids due to air accumulation, 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 1st Embodiment of this invention. FIG. 2 is an enlarged cross-sectional view taken along the line II in FIG. 1 and shows a state before a resin injection operation. FIG. 2 is an enlarged cross-sectional view taken along the line II in FIG. 1 and shows a state after completion of a resin injection operation. FIG. 4 is a view as viewed from the arrow of 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.

A: 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.

A-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 3a is formed so that it may descent 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 upper surface side and the left and right outer peripheral ends of the side wall 3 b 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 slightly matched with the inner peripheral shape of the existing sash frame 3. The outer peripheral edge of the side wall 4a is in close contact with or close to the inner peripheral edge of the side wall 3a of the existing sash frame 3, and the peripheral wall 4b of the new sash frame 4 and the existing sash frame A space 22 that is continuous in the extending direction of the sash frames 3 and 4 is formed between the three peripheral walls 3b. 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, similarly to the peripheral wall 3b of the existing sash frame 3. The space portion 22 opens to the outdoor side at the downwardly inclined portion and is closed by a removable sealing material 8.

  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 (extension direction). ing. In this embodiment, the connecting tool 6 is constituted by a bolt having a predetermined length, inserted into the peripheral wall 4b of the new sash frame 4 from the inner surface side, and the tip side thereof is connected to the peripheral wall 3b of the existing sash frame 3. The nut 6a is fixed by welding in advance. Further, in FIG. 2, reference numeral 9 denotes a fitting that is attached to the inside of the new sash frame 4.

A-2: Preparatory work before injection of foamable resin A-2-1: Preparatory work for the existing sash frame 3 For the existing sash frame 3, the inner peripheral upper surface 2a of the opening 2 on the side of the housing 1 and 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.

A-2-2: Preparatory Work for the New Sash Frame 4 Also in the new sash frame 4, the resin injection hole 32 is formed as a preparatory work before the foamable resin is injected. That is, in this embodiment, as shown in FIG. 1, the resin injection hole 32 is formed over the entire circumference of the new sash frame 4. As shown in FIG. 2, the formation position is set to a position immediately above (outside) the peripheral wall 4b of the indoor side wall 4a, and a plurality of the formation positions are formed at predetermined intervals (about 50 to 200 mm) in the longitudinal direction. . Therefore, among these resin injection holes 32, the resin injection hole 32 provided on the upper surface side of the new sash frame 4 is also used as a drainage hole for water accumulated on the upper side of the peripheral wall 4b of the new sash frame 4. . The size and shape of the resin injection hole 32 is 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, as in the case of the resin injection hole 31 on the existing sash frame 3 side. It is desirable to be.

  As described above, even if water has accumulated in the space 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 due to the formation of the resin injection hole 32. Is quickly discharged to the outside through the resin injection hole 32. 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.

A-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. . The space 22 formed between the existing sash frame 3 and the new sash frame 4 is injected with a foamable resin through a plurality of resin injection holes 32 provided in the new sash frame 4. The foaming resin is injected into the space 22 mainly to prevent water from entering between the existing sash frame 3 and the new sash frame 4 or to reinforce the fixed state of the existing sash frame 3 and the new sash frame 4. It is done for the purpose. As described above, although the purpose of injecting the foamable resin into each of the space portions 21 and 22 is slightly different, the contents of the operation and the operational effects by the injection of the foamable resin are the same. The foaming resin injection operation into the space portion 22 between the sash frame 4 and the newly installed sash frame 4 will be described as an example, and the injection operation into the space portion 21 between the housing 1 and the existing sash frame 3 is assisted by this. The description is omitted.

  By the way, the injection of the foamable resin into the space 22 can be completed by a single injection, but in this embodiment, the resin cured layer 12 formed in the space 22 From the standpoint of preventing the remaining of the cavity, etc., the foamable resin is injected into the space 22 in a plurality of times by a predetermined amount. Here, for convenience of explanation, the first resin injection hole for initially injecting any one of the resin injection holes 32 formed at a predetermined interval in the longitudinal direction of the new sash frame 4. 32 is temporarily called. Further, the first resin injection hole 32 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 22 from the first resin injection hole 32 to inject foamable resin into the space 22. The injected foamable resin diffuses and moves forward while foaming and expanding in the space 22, and when this reaches the second resin injection hole 32, a part of the foamed resin layer in the process of foaming becomes the second resin. It overflows from the injection hole 32 to the outside. When the overflow amount reaches a predetermined amount, the foaming resin injection operation from the first resin injection hole 32 is stopped.

  Next, an injection gun is inserted into the third resin injection hole 32 that is one forward of the second resin injection hole 32 to inject a foamable resin into the space 22, and the fourth resin injection hole When a predetermined amount of the foamed resin layer that is in the process of foaming from 32 overflows a predetermined amount, the operation of injecting the foamable resin from the third resin injection hole 32 is stopped. By repeating the injection of the foamable resin in order, the cured resin layer 12 formed by curing the foamed and expanded foamable resin in the space 22 as shown in FIGS. 3 and 4. However, it will be formed in a multilayer shape in the foam expansion direction. That is, as shown in FIG. 4 for convenience, the first resin cured layer 12A, the second resin cured layer 12B, the third resin cured layer 12C,... .

  In addition, as the multilayer resin cured layer 12 is formed in the space portion 22 in this way, the resin cured layer 11 is also the first in the space portion 21 side on the existing sash frame 3 side. The resin cured layer 11A, the second resin cured layer 11B, the third resin cured layer 11C,... Are formed in a multilayer shape (see FIG. 4).

  As described above, the new sash frame 4 is placed inside or close to the periphery of the existing sash frame 3 by the “covering method” inside the existing sash frame 3 fixed to the opening 2 of the housing 1. Are inserted and fixed, a plurality of the resin injection holes 32 are formed at a predetermined interval in the extending direction of the space portion 22 on the side of the newly installed sash frame 4, and the space is formed from the resin injection holes 32. By injecting a foamable resin into the portion 22 and foaming and curing it to form the cured resin layer 12 in the space portion 22, the space portion 22 is filled with the resin cured layer 12. Intrusion of water into the portion 22 is prevented in advance. Therefore, it is possible to reliably prevent water from entering into the space portion 22 and accumulating there, and for example, the connecting tool 6 that connects the existing sash frame 3 and the new sash frame 4 is corroded by the accumulated water. In addition, it is possible to prevent the water mixed with iron rust from oozing out and soiling the surface of the casing 1.

  Further, when the foamable resin expands and expands in the space portion 22 and sequentially diffuses and moves into the space portion 22, the air in the space portion 22 is gradually pushed forward in the expansion direction of the foamable resin. Since a plurality of the resin injection holes 32 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, rainwater that has entered the space 22 or water due to condensation can be reliably prevented from entering the room through the cavity.

  On the other hand, in this embodiment, the foaming resin is injected into the space 22 stepwise through the resin injection holes 32 provided in the new sash frame 4 at a predetermined interval. Therefore, in the space portion 22, the foamed resin layer injected and expanded afterward 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 32 provided in the new sash frame 4 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 22 loses its escape and is compressed as the foamable resin expands, and an air reservoir with a high internal pressure is likely to occur in the foamed resin layer. It is not preferable. On the other hand, if the distance is too narrow, the rigidity of the newly installed sash frame 4 may be impaired, and the strength performance may be lowered. From this point of view, the formation interval of the resin injection holes 32 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 the other resin injection holes 32 located on the front side in the expansion direction of the foam from the resin injection holes 32 that are actually used for the injection work. It is possible to confirm that the foamable resin is sufficiently filled up to the portion of the other resin injection holes 32 by visually observing the overflow of the resin. Filling failure of the foamable resin due to insufficient foaming of the resin, etc. is reliably prevented, so that the fixing strength of the existing sash frame 3 and the new sash frame 4 is maintained well and the foaming resin is injected. 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.

A-4: Inspection of repaired state of sash frame As described above, the resin injection from the resin injection holes 32 provided in the new sash frame 4 to the space 22 is completed, and the expanded resin expanded and expanded. After the cured resin layer 12 is formed by curing, the overflowed resin portion overflowing and curing from the resin injection holes 32 of the new sash frame 4 is excised.

  The excision of the overflow resin portion exposes the resin cross section of the resin cured layer 12 to the outside. By observing the cross section of the resin, it is possible to inspect the repaired state of the existing sash frame 3 and the new sash frame 4. In other words, it is possible to detect with high probability the occurrence of curing failure occurring in a relatively deep portion of the resin cured layer 12 in the space 22 or the occurrence of cavities due to air accumulation, and the inspection accuracy and reliability by visual inspection. Will improve. 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 size of the resin injection hole 32 is set to a diameter of 5 to 30 mm when the resin injection hole 32 is a circular hole, and one side is 5 when the resin injection hole 32 is a rectangular hole. However, if the dimension of the resin injection hole 32 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 32 ·· Resin injection hole

Claims (6)

A method for repairing a sash frame, wherein a new sash frame is fitted and fixed inside or inside the existing sash frame fixed to the opening of the housing in a state of being in close proximity or close to the periphery of the existing sash frame. ,
A resin injection hole formed between the inner peripheral surface of the existing sash frame and the outer peripheral surface of the new sash frame and communicating with the space extending in the circumferential direction is provided at least between the existing sash frame and the new sash frame. A plurality of the space portions are formed at predetermined intervals on any one side surface,
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 1,
The injection of foamable resin into the space is to be performed multiple times,
A plurality of the resin injection holes are formed at a predetermined interval in the extending direction of the space portion. Among the plurality of resin injection holes, an arbitrary resin injection hole is used as the first resin injection hole, and the first resin injection hole is formed. From the side closer to the hole, the second resin injection hole, the third resin injection hole, the fourth 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 the stepwise injection of the foamable resin, the space portion is filled with the foamable resin and cured to form a cured resin layer, and the overflowed resin portion overflowed from the resin injection hole and hardened. A method for repairing a sash frame, characterized by cutting out a sash. 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 2,
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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