JP4322218B2 - Complete retrofitting method for joinery frames - Google Patents

Description

  The present invention relates to a complete post-installation method for joinery frames. More specifically, after finishing construction of baseboards and pasting of cloths, complete post-installation of joinery frames such as door frames for suspending doors and sash frames for attaching sashes. It relates to a method that can be done.

As is well known, in order to hang a joinery, for example, a door, it is necessary to attach a door frame (vertical frame) as a joinery frame to a wall.
In many construction sites, the following methods are still used. That is, taking the door frame as an example, after the wall base is constructed, the base frame is constructed, and then the vertical frame is attached. At this time, the door is temporarily suspended, the vertical frame is attached, and the door is removed for the subsequent work. After that, a baseboard is constructed and a cloth is pasted. Then finish hanging the door.

According to the above construction technique, when attaching the vertical frame to the base frame before construction of baseboard and cloth, it is necessary to bring both the joiner frame and the door to the construction site at the same time in order to suspend the door. There was a bulky problem for this simultaneous loading.
In addition, after hanging the door once at the site, it is to remove the door for the subsequent skirting work and crossing, but the removal work and the removed door to move to a position that does not interfere with the construction The work to do was a hassle.
Furthermore, the work of curing the joinery such as the subsequent skirting boards, the joinery frame attached for the cross-pasting construction, and the doors that have been removed is also required. In particular, it was necessary to adjust the joinery frame after construction of baseboards and cloths, or the joinery frame was damaged in the subsequent work, or the door opening method was changed due to the convenience of the owner. When it was necessary to redo the attachment of the joinery frame, it was necessary to break the wall and start again.

  In order to solve these problems, the present applicant previously proposed a retrofitting method for a door frame in Japanese Patent No. 3303192 (Patent Document 1).

Patent No. 3303192

As shown in FIG. 10, the left and right vertical frames 104 formed on the base 101 of the walls 100A and 100B of the building and attached to the left and right of the base frame 102 are applied to the base frame 102 of the walls 100A and 100B after the wall cloth 103 is installed. A door frame retrofitting method, the step of attaching the left and right vertical frames 104 to the left and right of the base frame 102 of the walls 100A, 100B after the wall cloth construction, the verticality of each of the left and right vertical frames 104, and A step of adjusting the straightness, a step of suspending the door 107 in the left and right vertical frames 104, and a step of adjusting the dust between the vertical frame 104 and the door 107; The attachment and adjustment of the frame 104 are arranged on the side surface on the base frame 102 side of each of the left and right vertical frames 104, and from the opposite side surface to the base frame 102. A method retrofit door frame made by the mounting member 105 can be adjusted the gap between the attachment and the underlying frame.
In this case, the left and right vertical frames 104 of the joinery frame have a U-shape and are formed to cover the wall. That is, the width of the left and right vertical frames 104 is larger than the wall thickness, and is composed of a central portion 108 and left and right coverings 109.

This prior art solves the problems of the prior art.
However, there were the following problems.
First, since the left and right 109 of the vertical frame 104 are covered with the wall, when the vertical frame 104 is attached to the base frame 102 by the attachment member 105 and the verticality, straightness, and gap adjustment are performed, the vertical frame 104 The positions of the end portions 110 of the left and right 109 are slightly different.
That is, the position of the end 110 is slightly different along the Y-Y direction.
Therefore, if the vertical frame 104 is attached and adjusted after construction of the baseboard and cross-sticking, there is a possibility that a slight gap is generated between the end of the baseboard and the end portion 110.
For this reason, in practice, due to this subtle problem, it was necessary to install and adjust the vertical frame 104 before the construction of the skirting board and the pasting of the cloth, and then to construct the baseboard and the pasting of the cloth. . For this reason, vertical frame curing and door curing are necessary for the subsequent skirting and cross pasting work, although it is necessary for a short period of time. It was necessary to adjust.
Further, since the vertical frame 104 is covered with the wall, the simple feeling of the whole joinery frame cannot be obtained.
Furthermore, since the vertical frame 104 is covered with the wall, there is a limit to increasing the opening size between the left and right vertical frames.
A finishing sheet is attached to the exposed surface of the vertical frame. However, in the conventional one, at least five sides are exposed to the outside, and the man-hour and area to which the finishing sheet is pasted are large, and thus the cost reduction is limited. In particular, since the vertical frame 104 covers the wall, the hinge 106 protrudes out of the wall. Therefore, there is room for improvement in walking safety.
Furthermore, in FIG. 10, it is assumed that there is a wall 100C positioned at a right angle to one of the other walls 100A and 100B.
Reference numeral 500 indicates a room, and 600 and 700 indicate corridors. In this case, even if the door 107 is suspended in the opening between the room 500 and the hallway 600, it is difficult to suspend the door in the hallway 700 between the walls 100B and 100C. This is because even if the vertical frame 104 can be attached to the wall 100C, it is difficult to attach the vertical frame 104 to the position of the wall 100B facing it. That is, the vertical frame 104 attached to the position of the wall 100B facing the wall 100A and the vertical frame 104 to be attached to the position 300 of the wall 100B facing the wall 100C interfere with each other at the reference numeral 400.

In order to solve the problems of the above prior art and the above prior art, the present invention has the following technical means.
As shown in FIGS. 1 and 4, the present invention is a method for attaching left and right joinery frames 10a and 10b from the ceiling to the floor without providing an upper frame, and then attaching doors, sashes, etc. The joinery frames 10a and 10b have a width equal to or less than the wall thickness, and the joinery frame is attached in such a manner that the joinery frame is fitted within the wall thickness.
Furthermore, the present invention attaches a base frame to each of the left and right walls, then constructs necessary baseboards on the walls, and after attaching the cloth, attaches left and right joinery frames to each of the left and right base frames. The fitting groove for fitting the fitting frame to the right and left base frames of the left and right walls in the method of attaching the fittings such as doors and sashes after adjusting the verticality, straightness and gap using In addition, the width of the joinery frames 10a and 10b is equal to or less than the thickness of the wall, and the right and left joinery frames are fitted to the respective fitting grooves on the left and right sides, and the attachment members are used. The installation method is also characterized.

According to the complete retrofitting method of the joinery frame of the present invention described above, after finishing the construction of the baseboard and the pasting of the cloth, the vertical frames are respectively fitted into the fitting grooves of the right and left base frames, and are vertically The verticality, straightness, and clearance of the frame can be adjusted freely. In particular, this adjustment does not change the installation state of the baseboard. Therefore, before the adjustment of the vertical frame, the skirting board can be constructed according to the specifications, and therefore the cloth can be constructed according to the specifications. Therefore, the following effects are obtained.
1) Since it can be completely retrofitted as described above, it is possible to completely separate the work schedule of a craftsman or the like who puts a cloth and the work schedule of a door hanging work or the like in the construction process, and work efficiency is improved.
2) Since it can be completely retrofitted as described above, it is only necessary to bring the joinery frame, doors, etc. to the site just before they are needed for work. In addition, there is no need for an on-site storage location, moving work, or extra curing to prevent damage, improving work efficiency and contributing to cost reduction.
3) The external form of the constructed frame and the external form with the doors suspended are simple and refreshing. This is because the vertical frame is not attached so as to cover the left and right sides of the base frame, but is attached within the width of the left and right sides of the base frame.
4) Although the vertical frame is attached to the mating groove of the base frame by the mounting member, the left and right side surfaces of the vertical frame are firmly restrained by the wall of the fitting groove, so other auxiliary members are required. Without increasing the vertical frame mounting strength.
5) Since the vertical frame is attached by being fitted in the fitting groove of the base frame, the thickness of the vertical frame can be increased while the dimension between the left and right vertical frames (opening of the opening) is kept constant. This is because the depth of the fitting groove formed in the base frame can be increased to increase the thickness of the vertical frame. Thereby, the intensity | strength of a vertical frame can be increased according to a construction request.
6) The vertical frame is exposed to the outside in substantially only three surfaces (front and left and right side surfaces) with respect to the fitting groove of the base frame. Accordingly, a finishing sheet is attached to the vertical frame as the door frame, but the area and the number of steps for attaching the finishing sheet are small, and the cost can be easily reduced.
7) Since the vertical frame is fitted and attached to the fitting groove of the base frame, the vertical frame is retracted from the surface of the wall. For this reason, in the case of the vertical frame for hanging the door, the hinge for hanging the door and holding it openable does not jump out of the surface of the wall. The same applies to hinges. Therefore, walking in the room is safe.
8) Since the vertical frame is fitted and attached to the mating groove of the base frame, the depth between the vertical frame is adjusted by adjusting the depth of the mating groove formed in the base frame and the degree of fitting of the vertical frame to it. The opening size can be made wider.
9) The frame-frame fit is particularly good. This means that the door frame and door frame, and the door frame and sash frame can be constructed without mutual interference.
That is, a vertical frame for one opening portion can be attached to one wall, and another vertical frame for another opening portion can be attached at a position changed by 90 degrees.
That is, it is only necessary to form a fitting groove in the base frame, fit the vertical frame there and attach it with the mounting member, and the vertical frame does not jump out of the wall surface, so that one wall forms 90 degrees with each other. Two vertical frames can be attached without interfering with each other. That is, a single frame can be accommodated. Furthermore, since the hinge that supports the door so that it can be opened and closed can be prevented from jumping out from the wall surface, the mounting position of the hinge can be freely selected, and the opening direction of the door and the ease of opening thereof can be freely selected.

Next, an embodiment of the present invention will be described in detail with reference to FIGS.
In the description of the embodiment, description will be made in the order of the construction process. Here, a description will be given by taking an example of a so-called high door hanging with a high height from the floor to the ceiling.
FIG. 2 is a front view schematically shown in FIG. 1 and FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1 and FIG. 3 is a cross-sectional view taken along line 3-3. It shows the state up to the point where the attachment and the cloth have been pasted. That is, a floor and wall 1 (not shown) are constructed. The wall 1 has a base material 2 and a door base frame 3a, 3b for partitioning an opening A for door attachment. It shows to the place where the cloth 6 has been pasted.

The present invention is such that the door joinery frame can be completely retrofitted even after the baseboard 5 and the cloth 6 have been pasted, and this is due to the configuration shown below.
First, before assembling the base frames 3a and 3b to the base frames 3a and 3b shown above, the fitting grooves 7a and 7b for fitting the vertical frame of the joinery frame are formed in advance. . In other words, the base frames 3a and 3b having the fitting grooves 7a and 7b are assembled so that the fitting grooves 7a and 7b are directed to the opening A. Each of the fitting grooves 7a and 7b is formed in a concave shape from the top to the bottom along the longitudinal direction of the base frames 3a and 3b on the surface 8 of the base frames 3a and 3b. The size varies depending on the specifications of the building, the design, the type of door to be suspended, the design, etc., but here it shows what is for so-called high doors. As an example, the width dimension W of the base frames 3a and 3b is 97 mm, When the depth dimension L is 18 mm, the width T of each of the fitting grooves 7a and 7b is 77 mm, and the depth S is about 9 mm.

  Then, when the cloth 6 is pasted in the above-described steps, the end 6a of the cross 6 is just pasted to the end 9 of the fitting grooves 7a and 7b of the base frames 3a and 3b. Of course, this is only an example, and the end 6a of the cloth may be provided along the side walls of the fitting grooves 7a and 7b, or an easy finishing method can be arbitrarily employed.

  Next, each of the vertical frames 10a and 10b of the joinery frame prepared in advance is fitted into the fitting grooves 7a and 7b of the base frames 3a and 3b. The engaged state is shown in FIGS. 5, 7, and 8, respectively. That is, the width P of each of the vertical frames 10a and 10b is set so that the width T of the fitting grooves 7a and 7b can be fitted to the fitting groove 7a and 7b without excess or deficiency, and the depth Q is larger than the depth S of the fitting groove. Is set. For example, when P corresponds to an example of the dimensions of the base frames 3a and 3b and the fitting grooves 7a and 7b, the P is less than 77 mm and the Q is about 24 mm.

Each of the vertical frames 10a and 10b is provided with a plurality of, for example, four attachment members 11 at predetermined intervals along the vertical direction. The attachment member 11 can be of various shapes and configurations, and the one shown in this embodiment is as follows.
That is, the left and right vertical frames 10a and 10b are attached to the fitting grooves 7a and 7b of the base frames 3a and 3b after the skirting and cross construction, and the attachment to the left and right vertical frames 10a and 10b is performed by the attachment member 11. It is done by.
The mounting member 11 is connected to the base frames 3a and 3b from the side surface opposite to the base frame 3a and 3b side of each of the left and right vertical frames 10a and 10b to which the mounting member 11 is mounted. A base that has a cylindrical portion that is configured so that the gap between the mounting and the base frames 3a and 3b can be adjusted, and has a threaded portion 12 formed on the outer peripheral surface as shown in FIGS. A fixing portion 13 attached to the frames 3a and 3b, a cylindrical rotating portion 15 having a flange 14 formed on the inner surface of a screw portion to be screwed to the screw portion 12 of the fixing portion 13, and an outer fitting to the rotating portion 15 It comprises a mounting ring 16 that rotatably attaches the rotating portion 15 to the side surfaces of the left and right vertical frames 10a, 10b on the base frames 3a, 3b via the flange 14, and the cylindrical shape of the fixing portion 13 Part of the lock Rate 17 is disposed, by the lock plate 17 are made to be able to push the cylindrical portion threaded portion 12 and the notch 18 is formed.
Further, the attachment member 11 is attached in advance to the left and right vertical frames 10a and 10b by the attachment ring 16 in a state where the fixing portion 13 and the rotation portion 15 constituting the attachment member 11 are screwed together, and the rotation portion 15 is rotated. The fixing member 13 is fixed to the base frames 3a and 3b by inserting the screws 20 from the fitting holes 19 of the hexagon wrench R for fixing the fixing members 13 to the base frames 3a and 3b. The vertical frames 10a and 10b are attached to the fitting grooves 7a and 7b of the base frames 3a and 3b.

Therefore, after the baseboard 5 is attached and the cloth 6 is attached, that is, after the cloth is completely attached, each of the vertical frames 10a and 10b is attached to the base frames 3a and 3b using the attachment member 11, respectively. Can do.
That is, focusing on one vertical frame 10a, the vertical frame 10a is fitted into the fitting groove 7a. And the fixing | fixed part 13 is attached to the base frame 3a with the screw | thread 20 using the fitting hole 19. FIG.
Next, the vertical and linearity of the vertical frame 10a is adjusted. This adjustment rotates the rotating portion 15 of the mounting member 11 described above with respect to the fixing portion 13 attached and fixed to the base frame 3a. The rotation of the rotating portion 15 is performed by fitting a hexagon wrench R into a fitting hole 19 provided in the rotating portion 15 and rotating the hexagon wrench R. In addition, the rotating portion 15 is rotated. Is screwed to the screw portion 12 of the fixing portion 13, so that fine adjustment can be easily performed, and the vertical and linearity of the vertical frame 10a can be adjusted accurately. .
The adjustment and attachment of the vertical and linearity of the vertical frame 10b with respect to the other base frame 10b is the same.

Thereafter, the door 21 is suspended in the door frame constituted by the left and right vertical frames 10a and 10b, and further, the dust (gap) between the door frame and the door 21 is confirmed, and the adjustment is performed. This adjustment of dust can be performed in the same procedure as the adjustment of the verticality and linearity of the left and right vertical frames 10a and 10b described above.
Further, after the adjustment of the dust between the door frame and the door 21 is finished, the lock plate 17 disposed in the fixing portion 13 of the mounting member 11 is rotated to form the notch 18 of the fixing portion 13. Then, the construction of the door frame and the suspending of the door 21 are completed by expanding the screw portion 12 and fixing the rotating portion 15 so as not to rotate with respect to the fixing portion 13.
The suspension operation is held by a hinge 22 so that it can be opened and closed as usual, and a necessary door stop 23 is installed.

In the above description, the door frame is shown as an example, but the present invention can also be applied to a sash frame, and so-called high door suspension is shown as an example. However, the present invention can also be applied to a case where a door is suspended in an opening having an upper frame. . Although the end 9 of the cross 6 is shown to be processed in accordance with the ends of the fitting grooves 7a and 7b, the end 9 of the cross 6 may be along the wall and bottom of each of the fitting grooves 7a and 7b. Alternatively, the end 9 of the cross 6 is slightly raised through the ends of the fitting grooves 7a and 7b, and the vertical frames 10a and 10b are fitted and positioned in the fitting grooves 7a and 7b, respectively. You may join to the side wall of frame 10a, 10b.
Moreover, although the example which sticks the cloth 6 on the blaster board 4 was shown in the example of FIG. 2, FIG. 3, you may use a corner bead as usual at the corner.
As for the structure of the wall base, various conventional ones can be used. As shown in FIG. 9, the base frame 3a is widened and the baseboard 5 is applied to the base frame 3a. Or a cloth 6 may be attached. Furthermore, the base frame 3a shown in FIG. 9 may be divided into a central portion 3a and left and right portions 3a and 3a, and these may be coupled to each other with screws or the like to form a fitting groove 7a. .
The same applies to the base frame in the example shown in FIGS.
In such a case, if the width P of the vertical frame 10a has a tight fit and a phenomenon such as tightness occurs with respect to the width T of the fitting groove 7a, the left and right of the central member 3a By changing the coupling degree of the screw indicated by the dotted line of the member 3a or 3a, it is easy to realize an appropriate fitting state that is neither loose nor excessive and insufficient.

According to the above embodiment, there are the following effects.
1) After completing the construction of the skirting board 5 and the pasting of the cloth 6, the door is suspended by a complete retrofitting method. This is because the vertical frames 10a and 10b are fitted into the fitting grooves 7a and 7b of the left and right base frames 3a and 3b after the construction of the baseboard 5 and the pasting of the cross 6, and the vertical frame 10a, This is because the verticality, linearity, and gap adjustment of 10b can be freely performed. This is because the attachment state of the baseboard 5 is not particularly changed by this adjustment. This is because before the adjustment of the vertical frames 10a and 10b, the skirting board 5 can be constructed according to the specifications, and thus the cloth 6 can also be constructed according to the specifications.
2) Since it can be completely retrofitted as described above, it is possible to completely separate the work period of a craftsman or the like who puts the cloth and the work period of the work of hanging the door on the building process, and the work efficiency is improved.
3) Since it can be completely retrofitted as described above, it is only necessary to bring the joinery frame and door to the site just before they are needed for work. It is not incurred, and there is no need to move the place in the field to prevent damage and extra curing, improving work efficiency and contributing to low cost.
4) The external form of the constructed joinery frame and the external form with the doors suspended are simple and refreshing. This is because the vertical frames 10a and 10b are not attached so as to cover the left and right sides of the base frames 3a and 3b, but the vertical frames 10a and 10b are attached within the left and right widths of the base frames 3a and 3b.
5) Although the vertical frames 10a and 10b are attached to the fitting grooves 7a and 7b of the base frames 3a and 3b by the attachment member 11, the left and right side surfaces of the vertical frames 10a and 10b are the fitting grooves 7a and 7b. Since it is firmly restrained by the wall, the mounting strength of the vertical frames 10a and 10b is increased without requiring other auxiliary members.
6) Since the vertical frames 10a and 10b are attached by fitting into the fitting grooves 7a and 7b of the base frames 3a and 3b, the dimension between the left and right vertical frames 10a and 10b (opening of the opening) is kept constant. The thickness of the vertical frames 10a and 10b can be increased. This is because the depth of the fitting grooves 7a and 7b formed in the base frames 3a and 3b can be increased to increase the thickness of the vertical frames 10a and 10b. Thereby, the intensity | strength of a vertical frame can be increased according to a construction request.
7) The vertical frames 10a and 10b are substantially exposed to the outside only on three surfaces (front and left and right side surfaces) with respect to the fitting grooves 7a and 7b of the base frames 3a and 3b. Therefore, although not shown, a finishing sheet is attached to the vertical frames 10a and 10b. However, the area and the number of steps for attaching the finishing sheet are small, and the cost can be easily reduced.
8) Since the vertical frames 10a and 10b are fitted and attached to the fitting grooves 7a and 7b of the base frames 3a and 3b, the vertical frames 10a and 10b are retracted from the wall surface K. FIG. 8 shows the symbol K. For this reason, the hinge 22 for suspending and holding the door 21 so as to be freely opened and closed does not jump out of the surface K of the wall. The same applies to hinges. Therefore, walking in the room is safe.
9) Since the vertical frames 10a and 10b are fitted and attached to the fitting grooves 7a and 7b of the base frames 3a and 3b, the depth of the fitting grooves 7a and 7b formed in the base frames 3a and 3b and the vertical frame corresponding thereto By adjusting the fitting degree of 10a and 10b, the opening size between the left and right vertical frames 10a and 10b can be made wider. As an example, an opening size of 750 mm or more can be secured even if the specifications of the building and the wall are kept as they are.
10) The frame-frame fit is particularly good. This means that construction can be performed without mutual interference between the joinery frame and the joinery frame and between the joinery frame and the open sash frame.
Referring to FIG. 8, this is illustrated in FIG. 8. Symbol A is one wall, B is the other wall, A1 is an opening between one wall A and the other wall B for hanging the door 21, and C is the first wall. The third wall, A2, is an opening between one wall A and the third wall C for hanging the door 21, D is a room, E, and F are corridors. As is clear from this figure, a vertical frame 10a for the opening A1 is attached to one wall A, and another vertical frame 10a for the opening A2 is provided at a position that is turned 90 degrees. Can be attached. That is, it is only necessary to form the fitting groove 7a in the base frame 3a, fit the vertical frame 10a there and attach it with the attachment member 11, and the vertical frame 10a does not jump out of the wall surface K. Can attach the two vertical frames 10a at 90 degrees without interfering with each other. That is, a single frame can be accommodated. Furthermore, since the hinge 22 that supports the door 21 so as to be freely opened and closed can be prevented from jumping out from the wall surface K, the mounting position of the hinge 22 can be freely selected, and the opening direction of the door 21 and the opening method can be freely selected. In the example of FIG. 8, the opening direction of the door 21 of the opening A1 is toward the hallway side, and the opening direction of the door 21 of the opening A2 is toward the room side. The reverse is also possible. In addition, the door 21 for the opening A2 is indicated by an arrow M, but the hinge 22 can be reversed to make an arrow N. This is because the hinge 22 does not jump out of the wall surface K and is not dangerous for walking and can be set freely.

The front view which shows the place which finished the base board and cloth pasting which are in the middle of the process of the complete retrofitting method of the joinery frame of this invention. Sectional drawing which follows the 2-2 line of FIG. Sectional drawing which follows the 3-3 line of FIG. The front view which shows the place which attached the vertical frame which is the last step of the process of the complete retrofitting method of the joinery frame of this invention. Sectional drawing which shows the fitting and attachment state with respect to the base frame of one vertical frame along the 7-7 line | wire of FIG. The disassembled perspective view which shows an example of the attachment member for attaching a vertical frame to a base frame. Sectional drawing shown along line 7-7 in FIG. Sectional drawing which shows the aspect which suspended the door by the complete retrofitting method of the joinery frame of this invention, and also shows the advantage of a frame-frame accommodation. Sectional drawing which shows the other example of the base frame for enforcing the complete retrofitting method of the joinery frame of this invention. Sectional drawing which shows a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wall 2 Wall base 3a, 3b Joiner base frame 4 Blaster board 5 Skirting board 6 Cross 6a Cross end A, A1, A2 Opening 7a, 7b Fitting groove 8 Surface of base frame 9 End of fitting groove 10a DESCRIPTION OF SYMBOLS 10b Vertical frame 11 Mounting member 12 Screw part 13 Fixed part 14 Flange 15 Rotating part 16 Mounting ring 17 Lock plate 18 Notch part 19 Fitting hole 20 Screw R Hexagon wrench 21 Door 22 Hinge 23 Door contact K Wall surface

Claims (2)

A method of attaching left and right joinery frames 10a, 10b from the ceiling to the floor without providing an upper frame, and then attaching doors, sashes, etc.
An attachment method for a joinery frame, wherein the width of the left and right joinery frames 10a and 10b is set to be equal to or less than the thickness of the wall, and the joinery frame is fitted within the thickness of the wall. After the base frames 3a and 3b are attached to the left and right walls, the necessary baseboards 5 are installed on the walls, and the cloth 6 is pasted, the left and right base frames 3a and 3b are connected to the left and right base frames 3a and 3b. In the method of attaching the frames 10a and 10b using the attachment member 11 while adjusting the verticality, straightness and gap, and then attaching the door, sash, etc.
The fitting grooves 7a and 7b for fitting the fitting frames are formed in advance on the left and right base frames 3a and 3b, respectively, and the width of the fitting frames 10a and 10b is set to be equal to or less than the wall thickness. The fitting frames 7a and 7b are fitted to the left and right fitting frames 10a and 10b and attached using the attachment member 11, and the fitting frame is completely retrofitted to fit within the wall thickness. Construction method.

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