JP3474164B2 - Composite sash frame structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides heat insulation by housing a composite sliding frame in a composite window frame mounted in a window opening by covering an exposed portion of an aluminum frame on the indoor side with a resin frame. The present invention relates to a frame structure of a composite sash, which improves the property and prevents dew condensation, and eliminates the visual coldness of the metal frame.

[0002]

2. Description of the Related Art In recent years, a composite type sash window frame having a resin frame on an exposed portion on the indoor side of a window frame made of a metal frame such as an aluminum sash has been used to cover the exposed portion on the indoor side of an aluminum frame with a resin frame. Composite sashes that are composite type and contain sliding sliding doors are being used. This is to improve the heat insulation of the sash window by covering the indoor side of the metal frame or the metal frame with a resin whose thermal conductivity is extremely lower than that of metal, and to prevent dew condensation on the indoor side. It is intended to improve the design by eliminating the visual coldness of the metal frame and the metal frame and by making it integral with the interior decoration.

[0003]

However, the resin frame of the shoji in the composite type sash window is vulnerable to secular change or external shock, and discolors or is damaged, as compared with a metal frame such as an aluminum sash. In some cases, the demand for the replacement came early, and there was a problem how to efficiently replace the resin frame. In the conventional composite type sash window shoji, the resin frame is attached and fixed to the metal frame with a large number of screws.Therefore, in addition to the weight of the resin frame itself, the large number of screws causes It has a drawback that it becomes heavy and it is difficult to open and close it smoothly. Particularly in recent years, the shoji screens have been made thicker or have double glazings, so that the weight of the shoji screens has increased more and more, and the problem of opening and closing the shoji screens due to the increased weight has become more serious. Further, the fixing with a large number of screws has a drawback that the fixing work requires a lot of labor and causes an increase in cost.

The resin frame may need to be replaced earlier than a metal frame made of aluminum or the like, and the interior decoration may be changed so that the resin frame is integrated with the interior decoration. In such a case, at the same time, it may be necessary to replace the resin frame according to the interior decoration. However, conventionally, when exchanging the resin frame, a large number of screws must be removed, resulting in a problem that workability is extremely poor.

The present invention has been made in view of the above-mentioned conventional problems, and in a composite sash for improving heat insulation as a composite window frame to sufficiently prevent dew condensation, a metal frame made of a resin frame is used. It is an object of the present invention to provide a frame structure of a composite sash that facilitates smooth opening and closing of shoji while facilitating its removal and replacement, and reducing the weight of shoji.

[0006]

In order to achieve the above object, the present invention according to claim 1 is such that an indoor exposed portion of an aluminum frame is covered with a resin frame in a composite window frame mounted in a window opening. In a composite sash that accommodates a composite type sliding sliding door, a resin vertical wiring frame formed in a form that is substantially compatible with the surface shape of the aluminum vertical sliding frame and the aluminum vertical sliding frame to be attached to the indoor side surface of the sliding screen. The above-mentioned resin vertical frame is mounted on the aluminum vertical frame so that it can be slidably fitted by a fitting mechanism so as to leave voids at the upper and lower ends, and in the voids at the upper and lower ends of the vertical frame. A plate-shaped cap made of a resin material having substantially the same quality as the resin vertical frame is slidably attached, and the cap is provided with a protruding piece protruding toward the aluminum vertical frame facing the aluminum frame. If you slide it into the guide groove on the vertical frame, Is provided with a locking projection protruding toward the resin vertical frame, and the cap is locked and fixed to the resin vertical frame by locking the locking projection to the locking portion provided on the resin vertical frame. It is characterized by

According to a second aspect of the present invention, the sliding door is made into a composite type by covering the indoor side exposed portion of the aluminum frame with a resin frame in a composite window frame mounted in the window opening. In the composite sash, the vertical frame of the shoji is composed of an aluminum vertical frame and a resin vertical frame formed in a form substantially conforming to the surface shape of the aluminum vertical frame attached to the indoor side surface, and the resin vertical frame is made of aluminum. It is slidably fitted to the vertical frame by a fitting mechanism so that voids are left at the upper and lower ends.
A plate-shaped cap made of a resin material having substantially the same quality as that of the resin vertical frame is slidably attached to the voids at the upper and lower ends of the vertical frame, and the cap protrudes toward the facing aluminum vertical frame. And a locking protrusion that protrudes toward the resin vertical frame side, which is slidably fitted in the guide groove provided on the aluminum vertical frame. It is characterized in that the cap is locked and fixed to the resin vertical frame by being locked to the locking portion provided on the vertical frame, and the resin vertical frame is fixed to the aluminum vertical frame.

According to a third aspect of the present invention, in the present invention according to the first or second aspect, the cap is provided with a protrusion protruding toward the resin vertical frame, and the protrusion is provided on the resin vertical frame. It is characterized in that it is connected to the resin vertical frame by engaging with the hollow hole.

According to a fourth aspect of the present invention, in addition to the third aspect of the present invention, one side portion of the cap is provided with a projecting side piece projecting to the side of the horizontal frame. It is characterized in that the piece covers the joint gap between the vertical frame and the horizontal frame.

[0010]

[0011]

[0012]

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is a cross-sectional view of the sash window of the present invention as seen from the indoor side, FIG. 2 is a vertical cross-sectional view thereof, and FIG. 3 is FIG.
4 is an enlarged view of a main part of a shoji screen, FIG. 5 is an exploded perspective view of FIG. 4, FIG. 6 is a perspective view of an assembled state of FIG. 5, FIG. 7 is an exploded perspective view of a vertical frame, and FIG. Is a partial perspective view of the resin vertical frame, FIG.
(A, b) is a top view of an assembled state of a vertical frame.

In each of these drawings, the composite sash according to the present invention is of a composite type in which the indoor side exposed portion of the aluminum frame 13 is covered with a resin frame 14 in the composite window frame 1 mounted in the window opening A. Pay the sliding shoji 10. The frame structure of the present invention includes an aluminum vertical frame 13c which constitutes the vertical frame 11c of the shoji screen 10 and a resin vertical frame 14 which is attached to the side surface of the indoor frame.
c is slidably fitted to each other by a fitting mechanism, and the cap 100 is detachably attached to the upper and lower ends of the vertical frame 11c to fix the resin vertical frame 14c to the aluminum vertical frame 13c. The composite sash window of the present invention will be described in detail below.

Each frame member constituting the window frame 1 described as one embodiment is composed of an aluminum frame 2 serving as a base and a resin frame 3 covering the exposed portion on the indoor side. That is,
The aluminum frame 2 is configured by forming an aluminum upper frame 21, an aluminum lower frame 22, and aluminum vertical frames 23, 24 into a rectangular frame, and the resin frame 3 includes a resin upper frame 31, a resin lower frame 32, a resin vertical frame 33, Three
It is constructed by framing 4 in a square.

The resin upper frame 31 is an aluminum upper frame 2.
1, the resin lower frame 32 is attached to the aluminum lower frame 22, and the resin vertical frame 33 is
Is the aluminum vertical frame 23, and the resin vertical frame 34 is the aluminum vertical frame 24.
Are attached to each. The aluminum frame 2 is molded by an aluminum extrusion mold material, and the resin frame 3 is used.
Is extruded from vinyl chloride or acrylic resin. Further, it is possible to mix wood powder or the like into these resin materials to give an appearance as if they were made of wood.

On the other hand, each shoji 10 has a multi-layered glass 12 housed in a frame body 11 which is made up of upper and lower and left and right frame members which are frame-shaped. A screen door 4 is attached to the outdoor side.
The upper frame 11a, the lower frame 11b, and the vertical frame 11 that form the frame body 11.
Similarly to the window frame 1, each frame member of c and the vertical frame 11d (combined frame) is also composed of an aluminum frame 13 and a resin frame 14 attached so as to cover the exposed portion on the indoor side. That is, the resin upper frame 14a is on the aluminum upper frame 13a, the resin lower frame 14b is on the aluminum lower frame 13b, the resin vertical frame 14c is on the aluminum vertical frame 13c, and the resin vertical frame 14d is on the aluminum vertical frame 13d.
Are attached to each. In addition, the vertical frame 11
The aluminum vertical frame 13d and the resin vertical frame 14d, which form d, respectively, form a combined frame. The above aluminum frame 1
3 is made of extruded aluminum material and resin frame 1
4 is extruded from vinyl chloride or acrylic resin. Further, wood powder or the like can be mixed in these resin materials as in the window frame 1. The aluminum frame 2 and the resin frame 3, and the aluminum frame 13 and the resin frame 14 described above will be sequentially described below.

First, as shown in FIGS. 2 and 3, the above-mentioned aluminum lower frame 22 has its inner peripheral surface formed in a stepped shape, and from this surface, the lower outer rail 22a on the outdoor side and the indoor side. The lower inner rail 22b is formed to project. Then, a resin lower frame 32 made up of three resin frames is attached to the aluminum lower frame 22. That is, the resin lower frame 32 includes the resin main frame 41, which is a first resin frame, between the lower inner rail 22b on the indoor side and the rising piece, and the second resin on the indoor side of the rising piece.
A resin auxiliary frame 42, which is a resin frame, and a resin cover frame 43, which is a third resin frame, are attached between the lower outer rail 22a on the outdoor side and the lower inner rail 22b on the indoor side. It is installed so as to cover almost the entire inner peripheral surface of the aluminum lower frame 22 on the indoor side from the rail 22a.

Next, the resin cover frame 43 which is the third resin frame
Is attached between the lower outer rail 22a and the lower inner rail 22b in the indoor-side finding direction of only the shoji screen, and is a flat horizontal plate and an inverted L-shaped L-shape continuous to the indoor side. The cross section is substantially Z-shaped. The left end portion of the resin cover frame 43 located on the aluminum vertical frame 23 side is in contact with the resin vertical frame 33, and its upper surface is pressed and locked by the door stop block 35.

Next, as shown in FIG. 2, the aluminum upper frame 21
Has a hanging piece at a position corresponding to the outdoor-side lower outer rail 22a of the aluminum lower frame 22 with respect to the upper frame body, and has a protruding piece on the indoor side. The hanging piece is integrated with the locking piece of the resin upper frame 31 to form an upper outer rail on the outdoor side. The resin upper frame 31 is installed so as to cover the inner peripheral surface of the aluminum upper frame 21 on the indoor side of the hanging piece.

Next, the structure of the left and right vertical frames will be described with reference to FIGS. Aluminum vertical frame 2 on the left side in the figure
The reference numeral 3 has a locking projection piece substantially at the center of its inner peripheral surface, and has an abutting piece parallel to the locking projection piece at the indoor end. The resin vertical frame 33 has an expected width that is substantially half that of the aluminum vertical frame 23, and the aluminum vertical frame 2 on the indoor side of the locking projection piece 2 is provided.
It is installed so as to cover the inner peripheral surface of 3.

The aluminum vertical frame 24 on the right side has a locking projection piece substantially at the center of its inner peripheral surface, and an abutting piece parallel to the locking projection piece at the indoor end. Resin vertical frame 34
Has an expected width that is substantially half that of the aluminum vertical frame 24, and is installed so as to cover the inner peripheral surface of the aluminum vertical frame 24 on the indoor side of the locking projection.

Next, the frame 11 which constitutes the outer shoji 10A and the inner shoji 10B has its upper frame 11a, lower frame 11b, and vertical frame 1.
Similar to the window frame 1, each of the frame members 1c and the vertical frame 11d (combined frame) is composed of an aluminum frame 13 and a resin frame 14 attached so as to cover the exposed portion on the indoor side. In the present invention, the resin upper frame 14a is an aluminum upper frame 13a, the resin lower frame 14b is an aluminum lower frame 13b, the resin vertical frame 14c is an aluminum vertical frame 13c, and the resin vertical frame 14d is an aluminum vertical frame 13d. , Are mounted so that they can be slidably fitted together. That is, fitting grooves are provided at both ends of the frame member, and projections at both ends of the aluminum material are fitted into the fitting grooves for slide mounting. It should be noted that the aluminum vertical frame 13d and the resin vertical frame 14d that form the vertical frame 11d each constitute a summing frame, and basically also have the same configuration as the aluminum vertical frame 13c and the resin vertical frame 14c. Become. Less than,
The vertical frame 11c of the internal shoji 10B will be described in detail with reference to FIGS. 4 to 9. The vertical frame 11c of the shoji screen 10A
Also has the same configuration.

As shown in FIG. 4, in the vertical frame 11c according to the present invention, the resin vertical frame 14c is slidably mounted on the aluminum vertical frame 13c.
c is a space 100 at the upper and lower ends of the aluminum vertical frame 13c.
A and 100B are attached, and the space 100
Caps 100, 100 described later are removably attached to A and 100B. That is, the resin vertical frame 1
FIG. 9A shows a plan view of the state in which 4c is slidably fitted to the aluminum vertical frame 13c.

As shown in FIGS. 7, 8 and 9, the resin vertical frame 14c is formed in a shape that substantially matches the surface shape of the aluminum vertical frame 13c, and the fitting groove 1 formed on both sides of the resin vertical frame 14c.
41 and 142 have projection pieces 131 on both sides of the aluminum vertical frame 13c,
The slide 132 can be freely fitted. Then, the resin vertical frame 14c forms a void 100A at a position corresponding to the upper half of the adjacent upper frame 11a.
The cap 100 is attached to 0A. Further, as shown in FIG. 8, the resin vertical frame 14c is provided at a position corresponding to the lower half of the adjacent upper frame 11a, and the fitting grooves 141 on both sides are provided.
The edges of 142 are cut away, which allows the upper frame 11
The a and the resin upper frame 14a are connected while maintaining a flush state. That is, after the resin vertical frame 14c is slidably fitted to the aluminum vertical frame 13c, the resin upper frame 14a is slidably fitted to the aluminum upper frame 13a, so that the resin upper frame 14a and the resin vertical frame 14c are flush with each other. Let The removal is performed in the reverse order of the above.

The cap 100 is made of a resin material having substantially the same quality as the resin vertical frame 14c, the resin upper frame 14a, etc., and has a plate-like shape. The projecting piece 101 protrudes toward the facing aluminum vertical frame 13c (outdoor side). The protruding piece 101 is attached to the aluminum vertical frame 13c by fitting it into a guide groove 133 provided on the indoor side surface of the aluminum vertical frame 13c. Further, the cap 100 is provided with a locking projection piece 102 projecting to the resin vertical frame 14c side (downward), and the locking projection piece 102 is provided on the resin vertical frame 14c or the aluminum vertical frame 1.
The cap 100 is locked and fixed to the resin vertical frame 14c by being locked to the locking portions 144 and 134 formed of the cut grooves provided in the 3c, and the resin vertical frame 14c is fixed to the aluminum vertical frame 13c. As shown in FIGS. 4 and 5, the locking projection 102 is provided with a claw portion 102a at the lower end thereof.
02a is elastically locked to a locking portion 134 provided by cutting the side wall of the guide groove 133 of the aluminum vertical frame 13c. In addition,
The locking projection 102 is provided with a locking portion 144 formed by cutting the side wall of the projection 143 on the resin vertical frame 14c, and the claw portion 102 of the locking projection 144.
The cap 100 can be fixed to the resin vertical frame 14c by locking a. However, the cap 100 can also be fixed to the aluminum vertical frame 13c and the resin vertical frame 14c by locking the locking parts 134 and 144 on both sides.

Further, the resin vertical frame 1 is attached to the cap 100.
4c (downward) is provided with a protrusion 103, and the protrusion 103 engages with a hollow hole 144 provided on the upper surface of the resin vertical frame 14c to form an integral connection with the resin vertical frame 14c. ing. On the resin upper frame 14a side, which is one side of the cap 100, there is provided a projecting side piece 104 projecting to the resin upper frame 14a side, and the projecting side piece 104 and the resin vertical frame 14c and the resin vertical frame 14c. A joint gap 105 (shown in FIG. 5) formed between the upper frame 14a and the upper frame 14a is covered. With this projecting side piece 104, the resin vertical frame 14c and the resin upper frame 1
4a, the joint gap 105 between the resin vertical frame 14 and
c and the resin upper frame 14a are integrally connected to each other.
9B is a plan view showing a state in which the resin vertical frame 14c is slidably mounted on the aluminum vertical frame 13c, and the cap 100 is mounted on the upper end portion thereof.

A lower cap 100 similar to the one described above is also mounted in the space 100B at the lower end of the vertical frame 11c.
Since it is formed vertically different from 0 and has substantially the same shape, its description is omitted. In addition, the vertical frame 1 which is the inner frame
1d also basically has the same configuration as the vertical frame 11c described above, except that the resin vertical frame 14d has a substantially L shape, and the resin vertical frame 14d is slidably fitted onto the aluminum vertical frame 13d. After fitting, attach the upper and lower caps to the upper and lower ends as well.

Next, the procedure for assembling the vertical frame 11c according to the present invention will be described with reference to FIGS. First,
As shown in FIG. 7, the protrusions 131 and 132 provided on both sides of the aluminum vertical frame 13c are fitted with the fitting grooves 141 and 142 formed on both sides of the resin vertical frame 14c, and slide-fitted in the longitudinal direction. Then, the resin vertical frame 14c is attached to the aluminum vertical frame 13c. Then, as shown in FIG. 5, the resin vertical frame 14
The caps 100, 100 are detachably attached to the gaps 100A, 100B provided in the upper and lower ends of the aluminum vertical frame 13c. At this time, the cap 100 has the protruding piece 101.
Is engaged with the guide groove 133 of the aluminum vertical frame 13c and slid to be attached to the void 100A.
02 is a locking portion 1 of a resin vertical frame 14c or an aluminum vertical frame 13c
34 and 144 are elastically locked and the projection 103 engages with the hollow portion 144 of the resin vertical frame 14c,
The lower surface of the cap 100 is adjacently connected to the upper surface of the resin vertical frame 14c. At the same time, the protruding side piece 104 of the cap 100
Covers the joint gap 105 generated between the resin vertical frame 14c and the resin upper frame 14a.

The aluminum vertical frame 13c of the resin vertical frame 14c
First, the caps 100, 100 attached to the upper and lower ends of the vertical frame 11c are removed from this, and if necessary, the upper frame 11a and / or the lower frame 11b are slid sideways to connect with the resin vertical frame 14c. In the state where is released, slide the resin vertical frame 14c to remove it from the aluminum vertical frame 13c, and then insert a new new resin vertical frame into the aluminum vertical frame 13c.
Slide mount to c.

The configuration of each window frame in this embodiment has been described above. As described above, the resin vertical frame 14c and the cap 100 are basically attached to the aluminum vertical frame 13c by the fitting structure and the locking structure.
Therefore, when it is necessary to replace these resin frames due to aging, damage due to impact, etc., the cap 100 is removed from the upper and lower ends of the aluminum vertical frame 13c without opening the aluminum frame, and the resin vertical frame is removed. By sliding 14c from the aluminum vertical frame 13c, the resin vertical frame 14c can be removed and replaced.

The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the matters described in the above embodiments, and changes and improvements can be made based on the description of the claims. For example, resin vertical frame 14
c form, its slide fitting structure, and cap 100
The design and the like can be arbitrarily changed.

[0033]

As described above, according to the present invention, the aluminum vertical frame which constitutes the vertical frame of the shoji screen and the resin vertical frame which is attached to the side surface of the indoor can be slidably fitted to each other by the fitting mechanism.
Since the resin vertical frame is fixed to the aluminum vertical frame by detachably attaching the caps to the upper and lower ends of the vertical frame, remove the cap from the vertical frame and slide the resin vertical frame to remove it from the aluminum vertical frame. This makes it extremely easy to remove and replace the resin vertical frame from the aluminum vertical frame.

Moreover, since the resin vertical frame is fixed to the aluminum vertical frame by the fitting mechanism without fixing with screws as in the conventional case, the weight of the screen can be sufficiently reduced, and You can open and close smoothly,
Further, the use of a large number of screws can be omitted, and the manufacturing unit price can be reduced. Further, according to the present invention, the resin vertical frame is slidably fitted to the aluminum vertical frame while leaving a gap at the upper and lower ends, and the cap is detachably attached to the gap at the upper and lower ends. The vertical frame is attached to the aluminum vertical frame by slide fitting, and by the cap,
Since the fixing is performed, there is an effect that the attaching operation can be simplified.

Further, the cap is provided with a projecting piece projecting to the side of the aluminum vertical frame facing the cap, and the projecting piece is slidably fitted in the guide groove provided in the aluminum vertical frame. Installation is smooth and strong. Furthermore, since the cap is provided with a locking projection, and the locking projection is locked to the locking portion provided on the resin vertical frame, the cap is locked and fixed to the resin vertical frame. The cap is integrated with the resin vertical frame, and even if the resin vertical frame expands and contracts due to temperature change, the cap integrally expands and contracts, so that there is an effect that no gap is formed in the joint portion.

According to the third aspect of the present invention, the cap is provided with a protrusion protruding toward the resin vertical frame side, and the protrusion is engaged with a hollow hole provided in the resin vertical frame so that the resin vertical frame is provided. Since they are connected to each other, there is an effect that both can be integrally and firmly connected. According to the present invention of claim 4, an overhanging side piece that projects toward the horizontal frame is provided on one side of the cap, and the overhanging side piece covers the joint gap between the vertical frame and the horizontal frame. Therefore, the projecting side piece has an effect that the joint gap between the resin vertical frame and the resin upper frame can be hidden, and the resin vertical frame and the resin upper frame can be integrally and adjacently connected to each other.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of the sash window of the present invention viewed from the indoor side.

FIG. 2 is a vertical sectional view of FIG.

FIG. 3 is an enlarged view of a main part of FIG.

[Figure 4] Enlarged view of the main parts of the shoji

5 is an exploded perspective view of FIG.

6 is a perspective view of the assembled state of FIG.

FIG. 7 is an exploded perspective view of a vertical frame.

FIG. 8 is a partial perspective view of a resin vertical frame.

FIG. 9 is a plan view of an assembled state of a vertical frame, (a) is a plan view of an assembled state of a resin vertical frame, and (b) is a plan view of an assembled state of a cap.

[Explanation of symbols] A window opening 1 window frame 2 Aluminum frame 3 resin frame 4 screen door 10 window shoji 11 frame 11a Upper frame 11b Lower frame 11c, 11d vertical frame 12 double glazing 13 aluminum frame 13c Aluminum vertical frame 14 resin frame 14c resin vertical frame 21 Aluminum top frame 22 Aluminum bottom frame 22a Lower outer rail 22b Lower inner rail 23 Aluminum vertical frame 24 aluminum vertical frame 31 Resin top frame 32 resin bottom frame 33 resin vertical frame 34 resin vertical frame 35 Door Stop Block 41 resin main frame 42 Resin auxiliary frame 43 Resin cover frame 100 caps 100A void 101 protruding piece 102 locking projection 102a claw 103 protrusion 104 Overhanging side piece 105 Bonding gap 131, 132 Projection piece 133 guide groove 134 Locking part 141, 142 Fitting groove 143 projecting piece 144 Locking part 145 hollow hole

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E06B 3/00-3/52 E06B 1/00-1/70

Claims (4)

(57) [Claims] 1. A composite sash, comprising a composite window frame mounted in a window opening, in which an indoor exposed portion of an aluminum frame is covered with a resin frame and a composite sliding sash is housed therein. The frame is composed of an aluminum vertical frame and a resin vertical frame formed in a shape that is substantially compatible with the surface shape of the aluminum vertical frame attached to the indoor side surface. It is mounted so that it can be slidably fitted by a fitting mechanism so that a space is left in the space, and a plate-shaped cap made of a resin material of approximately the same quality as the resin vertical frame is installed in the spaces at the upper and lower ends of the vertical frame. The cap is provided so that it can be slidably mounted, and the cap has a protruding piece that protrudes toward the aluminum vertical frame that faces the cap.This protruding piece slides into a guide groove provided on the aluminum vertical frame, and at the same time the resin vertical frame is attached. Providing a locking protrusion that projects, this locking protrusion Stile structure of the composite sash, characterized in that said cap is engaging and fixed to the resin stile by engaging the engaging portion provided on the vertical frame. 2. A composite sash in which a composite sliding frame is housed in a composite window frame attached to a window opening by covering an exposed portion of an aluminum frame on the indoor side with a resin frame, the composite sliding sash comprising: The frame is composed of an aluminum vertical frame and a resin vertical frame formed in a shape that is substantially compatible with the surface shape of the aluminum vertical frame attached to the indoor side surface. The resin vertical frame has upper and lower end portions with respect to the aluminum vertical frame. It is mounted so that it can be slidably fitted by a fitting mechanism so that a space is left in the space, and a plate-shaped cap made of a resin material of approximately the same quality as the resin vertical frame is installed in the spaces at the upper and lower ends of the vertical frame. The cap is provided so that it can be slidably mounted, and the cap has a protruding piece that protrudes toward the aluminum vertical frame that faces the cap.This protruding piece slides into a guide groove provided on the aluminum vertical frame, and at the same time the resin vertical frame is attached. Providing a locking protrusion that projects, this locking protrusion The composite sash is characterized in that the cap is locked and fixed to the resin vertical frame by locking the locking portions provided on the vertical frame and the aluminum vertical frame, and the resin vertical frame is fixed to the aluminum vertical frame. Frame structure. 3. The cap is provided with a protrusion projecting to the resin vertical frame side, and the protrusion is engaged with a hollow hole provided in the resin vertical frame to connect with the resin vertical frame. The frame structure of the composite sash according to claim 1 or 2. 4. A cap is provided on one side of the cap with a projecting side piece projecting to the side of the horizontal frame, and the projecting side piece covers a joint gap between the vertical frame and the horizontal frame. The frame structure of the composite sash according to claim 3.