JP2001220958A - Synthetic resin window frame structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve joining strength by increasing a joining area when thermally welding and joining end surface by butting hollow structural members. SOLUTION: In this synthetic resin window frame structure constituted by using a frame body 50 by assembling the frame body 50 by joining the mutual end surface of these hollow structural members 10 by thermal welding in a butting state by obliquely cutting both end parts of the hollow structural members 10 composed of a synthetic resin, after respectively inserting connecting pieces 20 composed of a synthetic resin into opposed respective hollow parts 11 of the butting end surfaces 12 of the hollow structural members 10, both end parts are obliquely cut, and both end surfaces 12 are heated and butted to be thermally welded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame member which is formed by cutting both ends of a hollow structural member made of a synthetic resin obliquely and joining the hollow structural members by heat welding with their end faces abutting each other. The present invention relates to a synthetic resin window frame structure that constitutes a sash window frame or the like using the frame.

[0002]

2. Description of the Related Art In recent years, Japanese Patent Laid-Open No.
As shown in Japanese Patent No. 6584 and Japanese Patent Publication No. 7-11229, both ends of a frame made of a synthetic resin hollow structural member are cut obliquely at an appropriate angle, and heat is applied while the end faces of these hollow frames are butted together. It is known that a frame is assembled by welding to form a window frame using the sash frame assembled in this manner.

[0003] Such a synthetic resin window frame is formed by extrusion of a synthetic resin, and with the progress of the extrusion molding technique, the thickness of an extruded product has been reduced. Therefore, as described above, when the both ends of the frame made of the hollow structural member are cut obliquely and the end faces of these hollow frames are abutted to each other for heat welding / joining, the thickness of the joining surface is generally thin. As a result, a new problem has arisen that the bonding area is reduced as a whole and the bonding strength is reduced.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. As described above, due to the progress of synthetic resin extrusion, even if the thickness of synthetic resin extrusion is reduced, the thickness of the resin is reduced. By providing any auxiliary material at both ends of the frame made of a hollow structural member, these ends are cut obliquely, and even when the end faces of these hollow frames are butted and welded and joined. The present invention provides a synthetic resin window frame structure that constitutes a sash window frame or the like that can secure a sufficient thickness of a bonding surface and substantially increase a bonding area to improve a bonding strength. .

[0005]

According to a first aspect of the present invention, there is provided a synthetic resin window frame structure according to the first aspect of the present invention. The frame is cut obliquely and joined by heat welding in a state where the end faces of these hollow structural members are abutted to each other to assemble a frame. In the synthetic resin window frame structure formed using the frame, the hollow structural member Each of the connecting pieces made of synthetic resin is inserted into each of the opposing hollow portions of the butt end surface, and then both ends are cut obliquely, and the both end surfaces are heated and butt-welded.

According to a second aspect of the present invention, a synthetic resin window frame structure is formed by cutting both ends of a hollow structural member made of a synthetic resin obliquely, and heat-welding the hollow structural members in such a state that the end surfaces of the hollow structural members abut each other. In the synthetic resin window frame structure formed by using the frame body, the butt end faces of the hollow structural member are cut obliquely, and then the butt end faces are opposed to the respective hollow portions. A welding piece is formed by inserting a connecting piece made of a synthetic resin, and the both end faces are heated and butt-welded.

According to a third aspect of the present invention, there is provided a synthetic resin window frame structure according to the first or second aspect, wherein both ends of the hollow structural members are cut obliquely at an angle of 45 degrees to form each hollow. The parts are similar in shape, and connecting pieces are inserted into the hollow parts facing each other so as to face each other.

According to a fourth aspect of the present invention, there is provided the synthetic resin window frame structure according to any one of the first to third aspects, wherein a heating plate is brought into contact with both ends of the hollow structural member and heated. It is characterized in that both end faces are butted and heat-welded.

According to a fifth aspect of the present invention, there is provided a synthetic resin window frame structure according to any one of the first to fourth aspects, wherein both end surfaces of the hollow structural member are heated and butt-welded to each other. Thus, the weld bead generated at the joint portion is cut and corrected, and the whitening phenomenon generated at the bead removing portion is eliminated by heating.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of a window sash using the synthetic resin window frame structure of the present invention, FIG. 2 is a transverse sectional view of FIG. 1, and FIG. 3 shows an example of a hollow structural member used in FIGS. FIG. 4 is an enlarged perspective view, FIG. 4 is a schematic plan view of a frame before welding, and FIG.
Is a perspective view of the frame after welding, (a) is a perspective view immediately after welding, (b) is a perspective view in which the surface of the welded portion is cut, and (c) is a perspective view in which the cut portion is heated. FIG.

1 and 2, a window sash (a sliding window) using a synthetic resin window frame structure according to the present invention.
In this method, a rectangular frame 50 is assembled by joining the hollow structural members made of a synthetic resin by heat welding in a state where the end faces of the hollow structural members are abutted to each other, and a window 60 is housed in the frame 50 so as to be freely opened and closed. The frame 70, which is a frame of the window body 60, is also assembled into a square shape by joining the hollow structural members made of synthetic resin by heat welding with the end faces of the hollow structural members abutting each other. The window body 60 is configured by attaching the body 80. The frame adopting the configuration of the present invention described above,
It can be used as any sash frame such as windows, doors and shoji.

Each of the frames 50 and 70 is formed as follows. First, both ends of the hollow structural members 10 and 10 made of synthetic resin are cut obliquely and joined by heat welding in a state where the end surfaces of these hollow structural members 10 abut each other to form an L-shaped or rectangular frame. Assemble 50 and 70. Therefore, after inserting the connecting pieces 20 made of synthetic resin into the hollow portions 11, 11 formed in an enamel shape opposed to the butted end surfaces of the hollow structural members 10, 10, both ends are cut obliquely. , Both end faces 1
2 and 12 are heated and butt-welded.

As shown in FIG. 3, a plurality of hollow portions 11 are formed in the hollow structural member 10, and the connecting pieces 20 are inserted into the hollow portions 11, 11 having a large surface area, which are main portions thereof. In this embodiment, two connecting pieces 20, 20 are attached to the hollow portions 11, 11, respectively. In addition, the number and the insertion position of this connecting piece 20
It can be selected arbitrarily. According to the embodiment of the window sash shown in FIGS. 1 and 2, a plurality of connecting pieces are respectively provided at appropriate positions of the frame member constituting the frame body 50 and at appropriate positions of the frame member constituting the frame body 70 of the window body 60. 20, 20 are attached.

As shown in FIG. 3, the connecting piece 20 is made of a plate-like synthetic resin material having a substantially same cross-sectional shape as the hollow portion 11 of the hollow structural member 10 and an appropriate length. It is press-fitted into the hollow portion 11 and attached. After the connecting piece 20 is inserted into the hollow portion 11, the end of the hollow structural member 10 is cut obliquely. This oblique cutting is desirably 45 degrees, and by this 45 degree cutting, the shapes of both ends to be abutted of the hollow structural member 10 become similar to each other. Appropriate sensational bonding is performed. Further, the hollow portions 11, 1 facing each other are opposed to each other.
In contrast to this, if the connecting pieces 20 and 20 are inserted facing each other, the connecting pieces 20 are also welded to each other, together with the similar shape of the end of the member, and the frame body is formed. , And the integrated joining is further achieved. 1 and 2
As described above, the opposed hollow portions 11 and 11
2 shows an example in which the connecting piece 20 is inserted.

The plate-shaped synthetic resin material forming the connecting piece 20 does not necessarily have to be press-fitted so as to match the cross-sectional shape of the hollow portion 11. Insertion of the hollow structural member 1
It may be fixed by screwing or adhesively fixing to 0.

Then, as shown in FIG. 4, the end faces 12, 12 of the hollow structural members 10, 10 cut at 45 degrees and the end faces of the connecting pieces 20 are brought into close contact with a heating plate 30 (heat plate) and heated. After the parts have begun to melt as a whole, they are butted and bonded by heat welding. The heating temperature is preferably about 230 degrees. In addition, the end surface of the connecting piece 20 described above substantially forms a welding margin.

As the synthetic resin forming the hollow structural member 10 and the connecting piece 20, a thermoplastic resin such as a polyvinyl chloride resin, an acrylic resin, or an ABS resin is used. Needless to say, the resin material is not limited to the above-mentioned resins, and other resin materials having properties equivalent to these may be used.

Next, as shown in FIG. 5 (a), a weld bead formed by welding molten resins to each other at a joint between the ends 12, 12 of the hollow structural member 10 joined by heat welding. 13 (a bulge generated at the welded portion) may occur. Since the generation of the weld bead 13 remarkably reduces the commercial value of the synthetic resin sash, as shown in FIG. 5B, the weld bead 13 is produced by a mechanical method using a cutting machine or the like, or by a manual operation using a chisel or the like. Welding bead 1
3 is scraped off and the surface is modified.

Next, the end portion 12 of the hollow structural member 10 from which the weld bead 13 has been scraped off as described above is removed.
In the bead removing portion 14 which is a seam portion, plastic deformation is caused in the resin material by the above-mentioned cutting, and the portion may change in hue to a white color, that is, a whitening phenomenon called brushing may occur. Therefore, as shown in FIG. 5 (c), the bead removing unit 14 having the change in hue emits hot air for about 10 seconds by the hot air blower 40. Due to this warm air radiation, the color temporarily changed to white due to the plastic change returns to the original color of the synthetic resin. A similar effect can be obtained by laser beam irradiation, infrared ray irradiation, or heat contact with a heat plate instead of the warm air blower 40.

When the surfaces of the frame members 50 and 70 made of the hollow structural member 10 are made of a wood-grained skin layer, the cutting correction of the weld bead 13 and the whitening phenomenon that occurs in the bead removing portion are prevented. The heating correction is very useful for improving the quality of the external surface of the sash frame.

Next, FIG. 6 is a plan view schematically showing a hollow structural member constituting a window sash according to a second embodiment before welding of a frame, and FIG. 7 is a plan view showing a state where the frame is joined. FIG. In the present invention according to the second embodiment, first, both ends of the hollow structural members 10 made of synthetic resin are cut obliquely in advance, and the cut end faces of these hollow structural members 10 are cut into opposing hollow portions 11. Connecting piece 2 made of synthetic resin
0 and 20 are inserted, and both end surfaces 12 and 12 are heated and butt-welded.

Therefore, as shown in FIGS. 6 and 7, a connecting piece 20 made of a plate-like synthetic resin material having a substantially same cross-sectional shape as the hollow portion 11 of the hollow structural member 10 and having an appropriate length is pressed into the hollow portion 11. The end of the connecting piece 20 is also obliquely cut in advance in the same manner as the hollow structural member 10, and the cut end projects slightly outside from the end of the hollow portion 11 of the hollow structural member 10. Thus, a welding allowance 21 for welding and joining is formed. The protrusion amount is about 0 to 10 mm, that is, it is flush with the end face of the hollow structural member 10 or 10 m from the end face.
The protrusion amount is about m, and a protrusion amount of about 5 mm is preferable. However, even when the amount of protrusion of the welding allowance 21 of the connecting piece 20 is zero, the end face itself of the connecting piece 20 substantially constitutes the welding allowance. It is desirable that the angled cutting of the end of the member is also 45 degrees.
By cutting five times, the shape of the both end portions where the hollow structural member 10 abuts becomes similar to each other, so that a joint with a sense of unity can be achieved.

Then, as shown in FIG. 7, the end faces 12, 12 of the hollow structural members 10, 10 cut at 45 degrees are heated by bringing the heating plate 30 into close contact with each other, and the whole portion starts to melt. Then, they are butted and bonded by heat welding. Since these hollow end surfaces are butted and joined by heat welding, the thick cross section of the hollow structural member 10 and the welding allowance 21 of the connecting piece 20 are integrated by melting, so that the joint area increases integrally, The joining strength is improved.

As the synthetic resin forming the hollow structural member 10 and the connecting piece 20, as in the first embodiment, a thermoplastic resin such as polyvinyl chloride resin, acrylic resin, ABS resin or the like is employed. . In the first and second embodiments, the synthetic resin materials constituting the hollow structural member 10 and the connecting piece 20 may be different from each other.

[0025]

As described above, according to the present invention, a connecting piece made of synthetic resin is inserted into each opposing hollow portion of the abutting end surface of the hollow structural member, and the end of the member is obliquely inserted before and after that. Since the end faces of the hollow structural member are cut and heated and butt-welded together, even if the joining thickness of the end face of the hollow structural member is thin, a connecting piece as an auxiliary material is inserted into the hollow portion. From these, the surface to be welded and joined by abutting these hollow end surfaces is the sum of the thick section of the member and the section of the connecting piece, and the joining area is substantially increased, and as a result, The joining strength can be significantly improved. In the invention of claim 2,
By joining and welding the hollow end surfaces by heat welding, the thick section of the hollow structural member and the welding allowance of the connecting piece are integrated by melting, so that the joint area increases integrally,
The joining strength can be further improved.

Further, according to the third aspect of the present invention, the end of the hollow structural member is cut obliquely at an angle of 45 degrees. By butt welding the cut end faces together, and since the connecting pieces are inserted facing each other to the butt facing hollow portions, the connecting pieces are also welded together, and the hollow member has a sense of unity and strong. A joint can be made. Further, the both end surfaces of the hollow structural member are heated and butt-welded, and the weld bead generated at the joint due to the heat welding is cut off and corrected, and the whitening phenomenon generated at the bead removing portion is heated and eliminated. Therefore, there is an effect that the quality of the appearance surface as the sash frame can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a window sash using a synthetic resin window frame structure of the present invention.

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is an enlarged perspective view showing an example of a hollow structural member used in FIGS.

FIG. 4 is a plan view schematically showing a frame before welding.

5A and 5B are perspective views of the frame after welding, in which FIG. 5A is a perspective view immediately after welding, and FIG. 5B is a perspective view in which the surface of a welded portion is cut;
(C) is a perspective view showing a state where the cutting portion is heated.

FIG. 6 is a plan view schematically illustrating a hollow structural member constituting a window sash according to a second embodiment before welding of a frame body.

FIG. 7 is a plan view showing a state in which the frames of FIG. 6 are joined.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Hollow structural member 11 Hollow part 12 End part 13 Welding bead 14 Bead removal part 20 Connecting piece 21 Welding allowance 30 Heating plate 40 Hot air heater 50 Frame body 60 Window body 70 Frame body 80 Glass body

Claims (5)

[Claims] 1. A frame body is formed by cutting both ends of a hollow structural member made of a synthetic resin obliquely and joining them by heat welding in a state where the end surfaces of these hollow structural members are butted against each other.
In the synthetic resin window frame structure formed by using the frame body, both ends are cut obliquely after inserting a connecting piece made of synthetic resin into each of the opposed hollow portions of the butt end surface of the hollow structural member. A synthetic resin window frame structure wherein the both end faces are heated and butt-welded. 2. A frame body is assembled by cutting both ends of a hollow structural member made of a synthetic resin obliquely, joining the hollow structural members by heat welding with their end faces abutting each other,
In the synthetic resin window frame structure constituted by using the frame body, a connecting piece made of synthetic resin is inserted into each of the opposing hollow portions of the butted end faces after diagonally cutting the butted end faces of the hollow structural member. A window frame structure made of synthetic resin, wherein both ends are heated and butt-welded to form a welding margin. 3. The butt ends of the hollow structural member are cut obliquely at 45 degrees, and each hollow portion has a similar shape, and a connecting piece is inserted into each hollow portion facing the butt. 2. The method according to claim 1, wherein
Or the synthetic resin window frame structure according to 2. 4. The synthetic resin window according to claim 1, wherein a heating plate is brought into contact with both ends of the hollow structural member and heated, and then the both end surfaces are butted and welded. Frame structure. 5. The method according to claim 1, wherein both ends of the hollow structural member are heated and butt-welded to cut and fix a weld bead generated at the joint due to the heat welding. The synthetic resin window frame structure according to any one of claims 1 to 4, wherein the window frame structure is eliminated.