JP7058461B2 - Sash frame, its assembly structure and its assembly method - Google Patents

Description

The present invention relates to a sash frame attached to an opening of a building, an assembly structure thereof, and an assembly method thereof.

At the opening of a building, a sash frame is usually fixed, and a shoji screen or the like is placed in the sash frame.
When assembling the sash frame, the upper and lower frames and / or the left and right vertical frames are respectively in order to bring the ends of the upper and lower frames into contact with each end of the left and right vertical frames to make the four circumferences continuous. Notches were machined at the ends and holes were machined.

For example, in Patent Document 1, "the upper and lower horizontal frames 6 and the left and right vertical frames 7 are assembled into a sash frame 2 as follows ... At the upper part of the left and right vertical frames 7 (a, b) ... Cut down by the vertical dimension (found width) of ... The impermeable wall 30 is excised from the inner peripheral surface of the prospective direction wall 29, leaving the dimension d2 ... The ridge 35 ... Left and right Similarly, the lower part of the vertical frame 7 (a, b) is cut off from the indoor side wall 32 ... The upper and lower horizontal frames 6 (a, b) are cut so that the end faces are orthogonal to the longitudinal direction. -The end of the impermeable wall 24 is cut off from the edge by the dimension d2 to form a notch 36. Both ends are processed in the same manner ... The ridge 35 of the vertical frame 7 fits into the notch 36 of the horizontal frame 6. Fitting of the ridge 35 and the notch 36 facilitates positioning when the horizontal frame 6 is abutted against the vertical frame 7 for positioning. It will be completed. ”(Paragraphs 0021 to 0025).

Japanese Unexamined Patent Publication No. 10-61347

The problems of the configuration of the sash frame of the conventional example and the corresponding assembly structure and assembly method are as follows.
(1) Notching and drilling of the profile are time-consuming, and skill is required to process them accurately.
(2) The problem of (1) can be solved by cutting the cutouts and holes at both ends of the processed material such as the shaped material using a processing device at the time of factory shipment of the shaped material. The processing equipment used for processing is generally an expensive machine tool, and it was necessary to consider its capital investment.
(3) If it becomes necessary to shorten the dimensions of the profile that was processed at the time of shipment from the factory due to changes in the dimensions of the openings at the construction site of the building, etc., after cutting the dimensions, cutouts, etc. Needed to form.

Therefore, the present invention does not require cutting and drilling of the profile, does not require skill in assembling the sash frame, and the profile processing device has only the specifications for cutting the profile. If there is no need for capital investment for expensive processing equipment for processing or drilling, and if it becomes necessary to shorten the dimensions of the profile due to changes in the dimensions of the openings at the construction site of the building, the dimensions will be reduced. It is an object of the present invention to provide a sash frame, an assembling structure thereof, and an assembling method thereof, which only needs to be cut and processed and does not need to form a notch or the like again.

In order to solve the above problems, the sash frame according to the present invention includes left and right vertical frames in which only the dimensions thereof are machined on the surfaces intersecting in the longitudinal direction of the profile and tapping holes are formed in the longitudinal direction . On the surfaces that intersect in the longitudinal direction of the profile, only the dimensions are processed , and the upper and lower horizontal frames with tapping holes formed in the longitudinal direction, and the upper horizontal frame and the left and right vertical frames are connected , and the left and right vertical frames are connected. Each corner block having a vertical frame fixing part having a screw hole communicating with the tapping hole of the frame and an upper frame fixing part having a screw hole communicating with the tapping hole of the upper horizontal frame, and the lower horizontal frame and left and right. It has a vertical frame fixing portion that connects the vertical frames and has screw holes that communicate with the tapping holes of the left and right vertical frames, and a lower frame fixing portion that has screw holes that communicate with the tapping holes of the lower horizontal frame. Each corner block is provided with a groove portion continuous with a groove portion formed in the vertical frame so that a vertical frame can be inserted, toward the opposite corner block via the upper horizontal frame or the lower horizontal frame. The sash frame is provided on the end face on the corner block side facing each other via the upper horizontal frame or the lower horizontal frame so as to project (the invention according to claim 1).

In order to solve the above problems, in the sash frame assembly structure according to the present invention, only the dimensions of the profile are processed on the surfaces intersecting in the longitudinal direction of the profile , and tapping holes are formed in the longitudinal direction. Only the dimensions of the vertical frame and the surface intersecting the longitudinal direction of the profile are machined , and the upper horizontal frame on which the tapping hole is formed in the longitudinal direction forms a screw hole that communicates with the tapping hole of the left and right vertical frames. On a surface that is connected by each corner block having an upper frame fixing portion formed with screw holes communicating with the tapping holes of the vertical frame fixing portion and the upper horizontal frame, and intersects the left and right vertical frames in the longitudinal direction of the profile. The lower horizontal frame in which only the dimensions are processed and the tapping hole is formed in the longitudinal direction becomes the tapping hole of the vertical frame fixing portion and the lower horizontal frame in which the screw hole communicating with the tapping hole of the left and right vertical frames is formed. Each corner block is connected by each corner block having a lower frame fixing portion formed with a threaded hole for communication , and each corner block has a groove portion continuous with a groove portion formed so that a vertical frame can enter in the vertical frame, or an upper horizontal frame or a groove portion. The structure is provided on the end face on the side of the corner block facing the upper horizontal frame or the lower horizontal frame so as to project toward the facing corner block via the lower horizontal frame (claim 2). The described invention).

In order to solve the above problems, the method of assembling the sash frame according to the present invention is to process only the dimensions of the profile as the left and right vertical frames on the surface intersecting the longitudinal direction of the profile in which the tapping hole is formed in the longitudinal direction. However, as the upper and lower horizontal frames, only the dimensions of the profile are machined on the surface intersecting the longitudinal direction of the profile in which the tapping holes are formed in the longitudinal direction, and the screw holes communicating with the tapping holes of the left and right vertical frames in the horizontal frame. A corner block having a vertical frame fixing portion formed by the above and a horizontal frame fixing portion having a horizontal frame fixing portion formed with screw holes communicating with tapping holes of the upper and lower horizontal frames is fixed, and the vertical frame is fixed to the corner block, or the vertical frame is fixed. A corner block having a vertical frame fixing portion having screw holes communicating with the tapping holes of the left and right vertical frames and a horizontal frame fixing portion having screw holes communicating with the tapping holes of the upper and lower horizontal frames is fixed and the corners thereof. The horizontal frame is fixed to the block, and in each corner block, a groove portion continuous with the groove portion formed in the vertical frame so that the vertical frame can enter is directed toward the opposite corner block via the upper horizontal frame or the lower horizontal frame. The assembly method is provided on the end faces on the corner block side facing each other via the upper horizontal frame or the lower horizontal frame so as to project (the invention according to claim 3).

According to the present invention, there is no need for notch processing and drilling processing of the profile, no skill is required for assembling the sash frame, and the profile processing device has only the specifications for cutting the profile. If there is no need for capital investment for expensive processing equipment for cutting and drilling, and if it becomes necessary to shorten the dimensions of the profile due to changes in the dimensions of the openings at the construction site of the building, etc. It is possible to provide a sash frame, an assembling structure thereof, and an assembling method, in which only the dimensions are cut and processed, and it is not necessary to form a notch or the like again.

An exploded perspective view of the sash frame, Perspective view of the main part of the sash frame, The same disassembled perspective view, (1) Plan view of the third corner block, (2) Front view and (3) Right side view, Perspective view of the main part of the sash frame according to another example, The same disassembled perspective view, (1) a plan view of the third corner block, (2) a front view of the same, and (3) a right side view of the same.

The sash frame 10 according to the present invention is arranged in an opening (not shown) and serves as a frame for building a shoji screen or the like, and is a profile as shown in FIGS. 1 to 3. On the surface (hereinafter referred to as the intersection surface) 22 that intersects in the longitudinal direction of the above, only the dimensions thereof are processed, and the tapping hole 23 is formed along the longitudinal direction of the profile (on the left side of the exterior). At the intersection surface 32 of the vertical frame) 20, the right vertical frame (vertical frame on the right side of the exterior), and the profile 32, only the dimensions thereof are processed, and the tapping hole 33 is formed along the longitudinal direction of the profile. The upper horizontal frame (hereinafter, also referred to as the upper frame) 30 and the lower horizontal frame (hereinafter, also referred to as the lower frame) 31 are connected to each upper end of the left and right vertical frames 20, 21 and each end of the upper frame 30, respectively. First and second corner blocks 40, 41, and third and fourth corner blocks 42, 43 connecting the lower ends of the left and right vertical frames 20 and 21 and the ends of the lower frame 31, respectively, and the first. The eighth watertight material 80 to 87 is provided.

The left and right vertical frames 20, 21 and the upper and lower frames 30, 31 cut to a size fixed to the opening of the building are not subsequently formed with notches or screw holes, and these notches or screw holes are formed. It is not shown in FIGS. 1 to 3.
The configurations common to the sash frames described in detail in this document use common terms, are shown substantially the same in each figure, detailed explanations are omitted, and are indicated by the same reference numerals as necessary. ..

The left vertical frame 20 is formed with a groove portion 24, an outdoor plate portion 25, and two tapping holes 23 on the back surface of the groove portion 24 in the longitudinal direction thereof. Each cross section of the outdoor plate portion 25 faces.
The tapping hole 23 is used to fasten a screw for connecting to the first and third corner blocks 40 and 42.
The groove portion 24 is designed so that a vertical frame of a sliding shoji can be inserted, and the outdoor plate portion 25 covers the outdoor side of the opening and is brought into contact with a pillar or the like for positioning in the indoor / outdoor direction. Is. The upper frame 30 and the lower frame 31 are also provided with outdoor plate portions 34 and 35 at the same positions as the outdoor plate portion 25 in the indoor / outdoor direction, respectively.
The left vertical frame 20 is formed as described above, and no notch or screw hole is formed at the end of the left vertical frame 20 including the intersecting surface 22 thereof.

Since the right vertical frame 21 is configured to be substantially the same as the left vertical frame 20, detailed description thereof will be omitted.

In the longitudinal direction of the upper frame 30, a guide portion 6 for guiding the shoji together with the rail portion 5 formed on the lower frame 31 and two tapping holes 33 are formed on the back surface thereof, and the intersection surface thereof. At 32, each cross section of the guide portion 6 and the tapping hole 33 faces.

No notches or screw holes are formed at the ends of the upper frame 30 including the intersection surface 32.

The lower frame 31 has two tapping holes 33 formed on the rail portion 5 and its back surface in the longitudinal direction thereof, and each cross section of the rail portion 5 and the tapping hole 33 faces the crossing surface 32.

In the lower frame 31, no notch or screw hole is not machined at the end portion including the intersection surface 32.

As shown in FIG. 1, the first corner block 40 includes a vertical frame fixing portion 44 for fixing the left vertical frame 20 and an upper frame fixing portion 45 for fixing the upper frame 30.

The vertical frame fixing portion 44 includes a horizontal side 440 and a vertical side 441 that substantially match the width of the left vertical frame 20 in the lateral direction, and is necessary for forming a screw hole 442 communicating with the tapping hole 23. A rectangular fixing plate portion 443 and an outdoor piece 444 continuous with the outdoor plate portion 25 are provided.

The upper frame fixing portion 45 is composed of a folded upper piece 450 that is folded up at a substantially right angle from the fixed plate portion 443, and the folded upper piece 450 has a horizontal side 451 that substantially matches the width of the upper frame 30 in the lateral direction. And, it is formed in a rectangular shape with a vertical side 452 having a width capable of contacting the intersection surface 32 of the upper frame 30.
The folded piece 450 is formed with a screw hole 453 that communicates with the tapping hole 33, and a vertical fin 454 that is continuous with the groove portion 24.

As shown in FIG. 1, the second corner block 41 includes a vertical frame fixing portion 44 for fixing the right vertical frame 21 and an upper frame fixing portion 45 for fixing the upper frame 30, and these are the first. Since it is configured to be substantially the same as the corner block 40 of No. 1, detailed description thereof will be omitted.

As shown in FIGS. 1 to 4, the third corner block 42 includes a vertical frame fixing portion 46 for fixing the left vertical frame 20 and a lower frame fixing portion 47 for fixing the lower frame 31.

The vertical frame fixing portion 46 includes a horizontal side 460 and a vertical side 461 that substantially match the width of the left vertical frame 20 in the lateral direction, and is a rectangle necessary for forming a screw hole 462 communicating with the tapping hole 23. A fixed plate portion 463 and an outdoor piece 464 connected to the outdoor plate portion 25 are provided.

The lower frame fixing portion 47 is composed of a folded lower piece 470 that is folded down from the fixing plate portion 463 at a substantially right angle, and the folded lower piece 470 has a horizontal side 471 that substantially matches the width of the lower frame 31 in the lateral direction. And, it is formed in a rectangular shape having a vertical side 472 having a width capable of abutting the intersecting surface 32 of the lower frame 31.
The folded piece 470 is formed with a screw hole 473 that communicates with the tapping hole 33, and a vertical fin 474 that is continuous with the groove 24.

As shown in FIG. 1, the fourth corner block 43 includes a vertical frame fixing portion 46 for fixing the right vertical frame 21 and a lower frame fixing portion 47 for fixing the lower frame 31. Since these are configured to be substantially the same as the third corner block 42, detailed description thereof will be omitted.

In the first to fourth corner blocks 40 to 43 configured as described above, the horizontal widths of the vertical frame fixing portions 44 and 46 match the widths of the left and right vertical frames 20 and 21 in the lateral direction. The widths of the upper and lower frame fixing portions 45 and 47 also match the widths of the upper and lower frames 30 and 31 in the lateral direction.
Therefore, when the left and right vertical frames 20, 21 and the upper and lower frames 30, 31 are assembled using the first to fourth corner blocks 40 to 43, for example, the outdoor plate portions 25, 34 and the outdoor piece 444, and the outdoor Each assembly point such as the plate portions 25, 35 and the outdoor piece 464 is substantially flush with each other, and has a simple form different from the conventional joint structure of the upper and lower frames and the vertical frame without forming unevenness. There is.

The first watertight material 80 to the eighth watertight material 87 are made of an elastic material (for example, butyl rubber), and are vertically and vertically connected to the left and right vertical frames 20 and 21 by the first to fourth corner blocks 40 to 43. By tightening the frames 30 and 31 with screws, the waterproof function is exhibited, and the shapes of the intersecting surfaces 22 and 32 are formed to be substantially the same, respectively.
The first watertight material 80 is between the upper end of the left vertical frame 20 and the first corner block 40, and the second watertight material 81 is between the left end of the upper frame 30 and the first corner block 40. The watertight material 82 is arranged between the right end of the upper frame 30 and the second corner block 41, and the fourth watertight material 83 is arranged between the upper end of the right vertical frame 21 and the second corner block 41.
The fifth watertight material 84 is between the lower end of the left vertical frame 20 and the third corner block 42, and the sixth watertight material 85 is between the left end of the lower frame 31 and the third corner block 42. The watertight material 86 is arranged between the right end of the lower frame 31 and the fourth corner block 43, and the eighth watertight material 87 is arranged between the lower end of the right vertical frame 21 and the fourth corner block 43, respectively.

The effects of the sash frame having the above configuration are as follows.
(1) The first and second vertical frames 20 and 21 in which only the dimensions are processed in the intersection surface 22 and the upper and lower frames 30 and 31 in which only the dimensions are processed in the intersection surface 32. , 3rd and 4th corner blocks 40, 41, 42, 43 can be screwed to the respective tapping holes 23, 33, so that the sash frame can be easily assembled and no special skill is required. It has become.
(2) The sash frame is expensive because it includes the left and right vertical frames 20, 21, the upper and lower frames 30, 31 and the first, second, third and fourth corner blocks 40, 41, 42, 43. It is not necessary to perform cutting such as notching or drilling at both ends of a processed material such as a profile using various processing equipment, and no capital investment is required for that purpose.
(3) Even if it is necessary to shorten the dimensions of the profile due to changes in the dimensions of the opening at the construction site of the building, the dimensions of the left and right vertical frames 20, 21 or the upper and lower frames 30, 31 are cut. This is sufficient, and there is no need to reshape the notch.
(4) The assembly points of the left vertical frame 20, the upper frame 30 and the first corner block 40, the assembly points of the right vertical frame 21, the upper frame 30 and the second corner block 41, and the left vertical frame 20. The assembly points of the lower frame 31 and the third corner block 42 and the assembly points of the right vertical frame 21, the lower frame 31, and the fourth corner block 43 are substantially flush with each other, and are vertically flush with the conventional upper frame. It has a different form from the joint structure with the frame.
(5) The first watertight material 80 is between the upper end of the left vertical frame 20 and the first corner block 40, and the second watertight material 81 is between the left end of the upper frame 30 and the first corner block 40. The third watertight material 82 is arranged between the right end of the upper frame 30 and the second corner block 41, and the fourth watertight material 83 is arranged between the upper end of the right vertical frame 21 and the second corner block 41. Therefore, watertightness can be achieved at each of the intersections 22 and 32 on the upper side.
Further, the fifth watertight material 84 is located between the lower end of the left vertical frame 20 and the third corner block 42, and the sixth watertight material 85 is located between the left end of the lower frame 31 and the third corner block 42. The watertight material 86 of 7 is arranged between the right end of the lower frame 31 and the fourth corner block 43, and the eighth watertight material 87 is arranged between the lower end of the right vertical frame 21 and the fourth corner block 43, respectively. Therefore, watertightness can be achieved at each of the lower intersections 22 and 32.

The assembly structure by the sash frame having the above structure is as follows.
The left vertical frame 20 and the upper frame 30 are connected by a first corner block 40, the right vertical frame 21 and the upper frame 30 are connected by a second corner block 41, and the left vertical frame 20 and the lower frame are connected. The structure is such that 31 is connected by a third corner block 42, and the right vertical frame 21 and the lower frame 31 are connected by a fourth corner block 43.

The method of assembling the sash frame configured as described above will be described.
A Shape material is processed.
The left and right vertical frames 20 and 21 are used to process only the dimensions of the profile, and the upper and lower horizontal frames 30 and 31 are used to process only the dimensions of the profile.
B The left and right vertical frames 20, 21 and the upper and lower frames 30, 31 are fixed by using the first to fourth corner blocks 40 to 43.
That is, the fixing plate portion 443 of the first corner block 40 is brought into contact with the intersection surface 22 of the left vertical frame 20 and screw-fixed to the tapping hole 23 via the screw hole 442.
Further, the crossing surface 32 of the upper frame 30 is brought into contact with the folded piece 450 of the first corner block 40, and the screw is fixed to the tapping hole 33 via the screw hole 453.
Similarly, the left and right vertical frames 20, 21 and the upper and lower frames 30, 31 are fixed by using the second to fourth corner blocks 41 to 43 to make the sash frame rectangular.
The order of assembly is not limited. For example, the upper frame 30 may be fixed to the first corner block 40 and then the left vertical frame 20 may be fixed, and both ends (left and right) of the upper frame 30 may be fixed. ), The first and second corner blocks 40 and 41 may be fixed, and then the left and right vertical frames 20 and 21 may be fixed. Further, the upper frame 30 and the lower frame 31 may be fixed after the first and third corner blocks 40 and 42 are fixed to both ends (upper and lower) of the left vertical frame 20.

The effects of the above assembly method are as follows.
(6) At the time of factory shipment of the upper and lower frames 30 and 31 and the left and right vertical frames 20 and 21 constituting the sash frame, the steps of notch processing and drilling processing of the respective end portions can be omitted.
(7) Further, even if the dimensions of the opening 1 are changed at the construction site, the steps of notch processing and drilling processing of the respective ends of the upper and lower frames 30, 31 and / or the left and right vertical frames 20, 21 are omitted. can.

Next, another embodiment will be described with reference to FIGS. 5 to 7.
This embodiment is different from the above embodiment in that the third corner block 42 is provided with a sweeping stage portion 48 capable of sweeping out dust and the like and draining dew condensation water and the like out of the frame.
The sweep step portion 48 has a shape substantially the same as the cross-sectional shape of the intersection surface 32 extending from the folded piece 470 of the third corner block 42, and a part of the rail portion 5 is provided. It is formed in the removed shape.
Similarly, the sweep step portion 48 may be formed on the fourth corner block 43.

The effects of the examples of the other examples as described above are as follows.
(8) Unlike the conventional sash frame, the notch processing for the sweep stage portion is unnecessary.

The present invention is not limited to the embodiments described above, and many modifications are possible by those having ordinary knowledge in the art within the technical idea of the present invention. For example, the project sash frame may be used instead of the sliding sash frame of the embodiment, or the FIX frame in which the glass is built may be used.

10 sash frame

20 Left vertical frame 21 Right vertical frame 22 Crossing surface 23 Tapping hole 24 Groove 25 Outdoor plate 30 Upper frame 31 Lower frame 32 Crossing surface 33 Tapping hole

40 1st corner block 41 2nd corner block 42 3rd corner block 43 4th corner block 44 Vertical frame fixing part 440 Horizontal side 441 Vertical side 442 Screw hole 443 Fixing plate part 444 Outdoor piece

45 Upper frame fixing part 450 Folded upper piece 451 Horizontal side 452 Vertical side 453 Screw hole 454 Vertical fin

46 Vertical frame fixing part 460 Horizontal side 461 Vertical side 462 Screw hole 463 Fixing plate part 464 Outdoor piece

47 Lower frame fixing part 470 Folded lower piece 471 Horizontal side 472 Vertical side 473 Screw hole 474 Vertical fin

48 Sweeping stage

5 Rail part

6 Guide section

80 1st watertight material 81 2nd watertight material 82 3rd watertight material 83 4th watertight material 84 5th watertight material 85 6th watertight material 86 7th watertight material 87 8th watertight material

Claims (3)

On the surfaces that intersect in the longitudinal direction of the profile, the left and right vertical frames in which only the dimensions are processed and tapping holes are formed in the longitudinal direction ,
On the surfaces that intersect in the longitudinal direction of the profile, the upper and lower horizontal frames in which only the dimensions are processed and tapping holes are formed in the longitudinal direction ,
An upper frame that connects the upper horizontal frame and the left and right vertical frames, and has a screw hole that communicates with the tapping holes of the left and right vertical frames, and a screw hole that communicates with the tapping holes of the upper horizontal frame. Each corner block with a fixed part ,
A vertical frame fixing part that connects the lower horizontal frame and the left and right vertical frames and has screw holes that communicate with the tapping holes of the left and right vertical frames, and a lower frame that has screw holes that communicate with the tapping holes of the lower horizontal frame. Each corner block with a fixed part ,
Equipped with
In each corner block, the upper horizontal frame is such that the groove portion continuous with the groove portion formed in the vertical frame so that the vertical frame can enter protrudes toward the opposite corner block via the upper horizontal frame or the lower horizontal frame . Alternatively, a sash frame provided on the end face on the side of the corner block facing each other via the lower horizontal frame. Only the dimensions of the profile are machined on the surfaces that intersect in the longitudinal direction of the profile, and only the dimensions are machined on the left and right vertical frames with tapping holes formed in the longitudinal direction and the surfaces that intersect in the longitudinal direction of the profile. In addition , there are screw holes that communicate with the tapping holes of the vertical frame fixing portion and the upper horizontal frame that have screw holes that communicate with the tapping holes of the left and right vertical frames. Connected by each corner block with the formed upper frame fixing part ,
Only the dimensions are machined on the surface intersecting the left and right vertical frames in the longitudinal direction, and the lower horizontal frame in which the tapping holes are formed in the longitudinal direction has screw holes that communicate with the tapping holes in the left and right vertical frames. Connected by each corner block having a lower frame fixing portion with screw holes communicating with the formed vertical frame fixing portion and the tapping hole of the lower horizontal frame .
In each corner block, the upper horizontal frame is such that the groove portion continuous with the groove portion formed in the vertical frame so that the vertical frame can enter protrudes toward the opposite corner block via the upper horizontal frame or the lower horizontal frame . Alternatively, the sash frame assembly structure is provided on the end faces on the side of the corner blocks facing each other via the lower horizontal frame . As the left and right vertical frames, only the dimensions of the profile are processed on the surface that intersects the profile with tapping holes formed in the longitudinal direction.
As the upper and lower horizontal frames, only the dimensions of the profile are processed on the surface intersecting the longitudinal direction of the profile in which the tapping hole is formed in the longitudinal direction.
Along with fixing a corner block having a vertical frame fixing portion in which screw holes communicating with the tapping holes of the left and right vertical frames are formed in the horizontal frame and a horizontal frame fixing portion in which screw holes communicating with the tapping holes of the upper and lower horizontal frames are formed. A vertical frame was fixed to the corner block, or a screw hole was formed in the vertical frame to communicate with the tapping holes of the left and right vertical frames. Fix the corner block having the horizontal frame fixing part and fix the horizontal frame to the corner block.
In each corner block, the upper horizontal frame is such that the groove portion continuous with the groove portion formed in the vertical frame so that the vertical frame can enter protrudes toward the opposite corner block via the upper horizontal frame or the lower horizontal frame . Alternatively, a method for assembling the sash frame, which is provided on the end faces on the side of the corner blocks facing each other via the lower horizontal frame .

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