Sliding sash in inner window device

Abstract

To provide a sliding sash in an inner window device.SOLUTION: A sliding sash in an inner window device for heat insulation installed on the indoor side of an existing window, the sliding sash being configured to include a synthetic resin panel (18) and left and right frames (19, 19) made up of a synthetic resin mold member for holding the left and right side edges of the panel and slidably fitted between a groove-shaped upper rail (6a) and a lower rail (6b), in which the lower edge of the panel (18) forms a non-holding edge (18b) that is not held by the mold member, the lower edge of the panel is formed so as to float without coming into contact with the groove bottom of the lower rail (6b) through slide parts (20) of the lower ends (19b, 19b) of the left and right frames, a decorative plate (26) is attached to a front surface (F) of the non-holding edge (18b), and a shielding edge (26a) that is close to the groove bottom of the lower rail is formed by the decorative plate (26).SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a synthetic resin sliding door that constitutes an interior window device for thermal insulation or the like. [Background technology]

[0002] The present applicant previously proposed a sliding door for an interior window in which a panel is fitted into a frame member made of a synthetic resin molding (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5322189 Summary of the Invention [Problem to be solved by the invention]

[0004] A sliding door according to the prior art proposed by the present applicant will be described with reference to Figs. 1 to 3.

[0005] As shown in Figure 1, an existing window 2 fitted within a rectangular framed frame 1 has sliding doors 3, 3 formed, for example, by fitting glass panels into an aluminum sash frame, and the window is opened and closed by moving the sliding doors 3, 3 along rail members installed on the upper and lower frames 1a, 1b.

[0006] In contrast, the heat-insulating inner window 4 is provided at hardware stores and the like as a DIY kit consisting of a synthetic resin molding and a panel, and is configured so that the user can simply and easily assemble the frame panels at home to produce the sliding door 5 without needing adhesives or fastening means such as screws. The produced sliding doors 5, 5 are then positioned on the inside (room side) of the existing window 2, and are mounted so as to be freely opened and closed along an upper rail 6a and a lower rail 6b that are installed on the upper and lower frames 1a, 1b with double-sided adhesive tape or the like.

[0007] As shown in FIG. 2, the sliding door 5 is constructed by fitting a panel 10 into the space within a frame body formed by left and right vertical frames 7, 7, an upper horizontal frame 8, and a lower horizontal frame 9, each of which is made of synthetic resin moldings.

[0008] The vertical frame 7, upper horizontal frame 8, and lower horizontal frame 9 are made of the same molding material. Therefore, the same components are denoted by the same reference numerals. As shown in the figure, these frames 7, 8, and 9 are integrally formed with an inner part 12 having a holding groove 11 into which the panel 10 is inserted from an opening facing the frame space, and an outer part 13 forming the groove bottom wall of the holding groove 11, the outer part 13 being formed in a hollow rectangular tube shape. The inner part 12 is provided with guide ribs 12a located near the groove bottom of the holding groove 11 and protruding in opposing directions from both groove walls.

[0009] Opposing elastic lips 14 are integrally formed on both groove walls located on the groove opening side of the retaining groove 11, so that the panel 10 is elastically clamped and held by the elastic lips 14, 14 with its edge inserted into the retaining groove 11. That is, both side edges of the panel 10 are inserted into the retaining grooves 11 of the left and right vertical frames 7, 7 and held by the elastic lips 14, the upper edge of the panel 10 is inserted into the retaining groove 11 of the upper horizontal frame 8 and held by the elastic lips 14, and similarly, the lower edge of the panel 10 is inserted into the retaining groove 11 of the lower horizontal frame 9 and held by the elastic lips 14.

[0010] The panel 10 is constructed of a hollow synthetic resin plate having a number of web plates 16 interposed in parallel between a pair of sheet plates 15 facing each other with a gap between them, and is integrated with the web plates 16 in a horizontal position and inserted into the space within the frame formed by the vertical frames 7, 7 and the upper and lower horizontal frames 8 and 9.

[0011] However, the inventor has discovered a surprising problem with the sliding doors of the prior art, which is illustrated in FIG.

[0012] As described above, the inner window 4, installed on the indoor side of the existing window 2, receives sunlight through the existing window 2. Therefore, the space between the existing window 2 and the inner window 4 becomes extremely hot. And, since the outer wall portion 9A of the lower horizontal frame 9 facing the outdoor side receives direct sunlight, the sliding door 5 heats up more than other portions.

[0013] For this reason, it was found that, among the vertical frames 7, 7, the upper horizontal frame 8, and the lower horizontal frame 9 that constitute the framework of the sliding door 5, the outer wall portion 9A of the lower horizontal frame 9 in particular expands, and as a result, the lower horizontal frame 9 is curved greatly in a bow shape toward the outside of the room. Incidentally, according to the knowledge of the present inventor, no significant bow shape bending was observed in the upper horizontal frame 8, but it was confirmed that this phenomenon was prominent in the lower horizontal frame 9.

[0014] However, although the sliding door 5 of the inner window 4 needs to open and close along the upper and lower rails 6a, 6b, the curved lower horizontal frame 9 is tightly fitted into the groove of the lower rail 6b along which it should slide, resulting in a problem that it cannot be opened or closed.

[0015] Therefore, as a result of extensive research, the inventor has found that the sliding door 5 provided as a DIY kit and assembled and used by the user at home is lightweight and made almost entirely of synthetic resin, and therefore the lower horizontal frame 9 is not necessarily required, and that even without the lower horizontal frame 9, the door is sufficiently strong and there is no problem with practicality.

[0016] However, after making prototypes of sliding doors that do not have a lower horizontal frame and conducting repeated experiments, it was discovered that there were further problems, as will be described later.

[0017] An object of the present invention is to provide a sliding door in an interior window device that solves these problems. [Means for solving the problem]

[0018] Therefore, the present invention is configured as a means for solving the above-mentioned problems, and is a sliding door in an insulating inner window device to be installed on the indoor side of an existing window, and is formed of a synthetic resin panel and left and right frames made of synthetic resin moldings that hold both the left and right edges of the panel, and is configured to be slidably fitted between grooved upper and lower rails, in which the lower edge of the panel is located between the lower ends of the left and right frames and forms a non-retained edge that is not held by the moldings, and the lower ends of the left and right frames form a slide portion that slidably contacts the groove bottom of the lower rail, and the non-retained edge of the panel is configured to float without contacting the groove bottom of the lower rail, and with respect to the front (F) of the panel facing the interior of the room and the back (R) facing the existing window, a synthetic resin decorative panel is attached to the front of the panel and follows the non-retained edge.

[0019] In an embodiment of the present invention, the decorative panel has a shielding edge portion protruding downwardly from the non-retaining edge portion and thereby approaching the groove bottom of the lower rail, and it is preferable that the shielding edge portion has a rib protruding in the groove width direction of the lower rail.

[0020] In this case, it is preferable that the decorative plate is in surface contact with the non-retaining edge portion of the panel in the longitudinal direction, and is fixed by bonding the decorative plate and the non-retaining edge portion at least in the central portion in the longitudinal direction.

[0021] It is preferable that the left and right frames are constructed of a synthetic resin molding integrally formed with an inner part having a retaining groove into which the side edge of the panel is fitted and a hollow outer part forming the groove bottom wall of the retaining groove, and the lower ends of the left and right frames are provided with a seat fixed to form the sliding part. In this case, it is preferable that the seat has a plate body arranged on the lower end faces of the left and right frames and a fixing piece standing from the plate body and fitted into at least one of the retaining groove and the hollow part in the outer part. Effect of the Invention

[0022] According to the present invention, the sliding door 17C does not have a component equivalent to the lower horizontal frame 9 of the prior art, so even when the space between the existing window 2 and the inner window 4 becomes hot due to exposure to sunlight, there is no problem of the door curving into a bow shape due to thermal expansion as occurs in the prior art.

[0023] Furthermore, the sliding portion 20 is formed on the lower ends 19b, 19b of the left and right frames 19, 19, and the lower surface of the lower non-retaining edge 18b of the panel 18 is raised so as not to come into contact with the groove bottom of the lower rail 6b, allowing the sliding door 5C to be opened and closed smoothly. At this time, since the decorative panel 26 is attached to the front of the lower non-retaining edge 18b, the decorative panel 26 can prevent the warm air from the outside from flowing into the room through the gap between the non-retaining edge 18b and the lower rail 6b, and there is an effect that the heat insulating function is not deteriorated. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is a perspective view showing the state before an inner window is attached to an existing window according to the prior art. [Diagram 2] This shows conventional technology for a sliding door that constitutes an interior window, where (A) is an oblique view showing the whole, (B) is a cross-sectional view of the upper horizontal frame, (C) is a cross-sectional view of the lower horizontal frame, and (D) is a cross-sectional view of the vertical frame. [Diagram 3] This shows the problems with the conventional technology, where (A) is a perspective view and (B) is a cross-sectional view taken along line AA. [Figure 4] FIG. 1 shows a first comparative example in which a conventional technique has been improved, in which (A) is a perspective view of a sliding door according to the first comparative example, and (B) is a perspective view in an exploded state. [Diagram 5] FIG. 13 shows a second comparative example which is an improvement over the first comparative example, in which (A) is a perspective view of a sliding door according to the second comparative example, and (B) is a perspective view in an exploded state. [Figure 6]Regarding the second comparative example, (A) is an oblique view showing the relationship between the lower rail and the underside of the sliding door, (B) is an oblique view showing the seat that constitutes the sliding section, (C) is an oblique view showing the state in which the seat is fixed to the lower end surface of the frame, and (D) is a cross-sectional view showing the state in which the fixing piece of the seat is inserted into the retaining groove of the frame and the hollow portion in the outer part. [Figure 7] FIG. 13 is a cross-sectional view of a portion of a sliding door that includes a non-retaining edge of a panel, illustrating a problem with the second comparative example. [Figure 8] 8 is a cross-sectional view taken along line AA in FIG. 7. [Figure 9] FIG. 2 is a perspective view showing an embodiment of the present invention, showing a state before a decorative panel is attached to a sliding door panel. [Figure 10] FIG. 1 is a perspective view showing a sliding door according to an embodiment of the present invention with a decorative panel attached. [Figure 11] FIG. 1 is a perspective view, partially cut away, of an embodiment of the present invention. [Figure 12] FIG. 2A is a cross-sectional view showing the non-retaining edge of the panel and the decorative board in a separated state, and FIG. 2B is an enlarged cross-sectional view showing the decorative board fixed to the non-retaining edge. [Figure 13] FIG. 2 is a perspective view showing the relationship between the lower rail and the lower surface of the sliding door according to the embodiment of the present invention. [Figure 14] 1 is a cross-sectional view showing the operation of a sliding door according to an embodiment of the present invention, illustrating a portion of the sliding door including a non-retaining edge portion to which a decorative panel is fixed. [Figure 15] 15 is a cross-sectional view taken along line BB in FIG. 14. [Figure 16] 10A and 10B show another embodiment of the decorative board, where (A) and (B) are cross-sectional views showing a second embodiment, and (C) is a cross-sectional view showing a third embodiment. [Figure 17] FIG. 11 is a perspective view showing another embodiment of a sliding door according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Before describing the present invention, a first and a second comparative example that the present inventors developed to improve the above-mentioned conventional technology will be described below.

[0026] (First Comparative Example) 4 shows a first comparative example, in which a sliding door 17A has a simple structure formed by holding both left and right side edges of a panel 18 only with left and right frames 19, 19. In other words, the upper horizontal frame 8 and the lower horizontal frame 9 in the sliding door 17 of the prior art are not provided.

[0027] The left and right frames 19, 19 are made of the same molding material as the vertical frames 7, 7 of the conventional technology described above. The panel 18 has the same configuration as the panel 10 of the conventional technology, but while the conventional technology has the web plate 16 arranged in a horizontal position, the first comparative example has the web plate 16 arranged in a vertical position. This results in a cross-sectional shape in which the squares formed by the sheet plate 15 and the web plate 16 are arranged horizontally.

[0028] As with the prior art (see Figure 1), the sliding door 17A is positioned on the inside (inside) of the existing window 2 and forms an inner window 4 by being slidably fitted between an upper rail 6a and a lower rail 6b laid on the upper and lower frames 1a, 1b.

[0029] In this case, the panel 18 of the sliding door 17A does not have an upper horizontal frame 8 and a lower horizontal frame 9 as in the prior art, that is, the upper edge and the lower edge are not held by moldings. Therefore, the upper edge of the panel 18 forms an upper non-holding edge 18a that extends without being held between the upper ends 19a, 19a of the left and right frames 19, 19, and similarly, the lower edge forms a lower non-holding edge 18b that extends without being held between the lower ends 19b, 19b of the left and right frames 19, 19.

[0030] In this way, the sliding door 17A does not have a component equivalent to the lower horizontal frame 9 of the prior art, so even when the space between the existing window 2 and the inner window 4 becomes hot due to sunlight, there is no problem of bowing due to thermal expansion as in the prior art. Furthermore, as described above, the panel 18 has the web plate 16 arranged in a vertical position, so the structure is such that thermal expansion in the lateral direction is suppressed.

[0031] The sliding door 17A is fitted between the upper rail 6a and the lower rail 6b, and slides while placed on the bottom of the groove of the lower rail 6b due to its own weight when the inner window is opened or closed.

[0032] However, in the case of the sliding door 17A of the first comparative example, both the undersides of the lower ends 19b, 19b of the left and right frames 19, 19 and the underside of the lower non-retaining edge portion 18b simultaneously come into contact with and slide against the bottom of the groove of the lower rail 6b, creating a new problem in that frictional resistance is large and smooth movement is not possible.

[0033] (Second Comparative Example) 5 to 8 show a second comparative example, which provides a sliding door 17B that solves the problems of the first comparative example described above.

[0034] The sliding door 17B is formed by holding both left and right side edges of the panel 18 only with left and right frames 19, 19, and in this respect it is similar to the sliding door 17A of the first comparative example, and the configurations of the panel 18 and the left and right frames 19 are also the same, so they are given the same reference numerals.

[0035] In the case of the second comparative example, the lower ends 19b, 19b of the left and right frames 19, 19 are formed with slide parts 20 that slidably contact the groove bottom of the lower rail 6b. As a result, when the sliding door 5B is fitted between the upper rail 6a and the lower rail 6b, the lower surface of the lower non-retaining edge part 18b of the panel 18 is floated via the slide parts 20 so as not to contact the groove bottom of the lower rail 6b. Therefore, when the sliding door 17B is opened or closed, only the slide parts 20 slide in contact with the groove bottom of the lower rail 6b, enabling smooth opening and closing.

[0036] As shown in FIG. 6, the slide portion 20 is preferably constructed by fixing a seat 21 made of synthetic resin to the lower ends 19b of the left and right frames 19.

[0037] The seat 21 is formed by erecting a first fixed piece 23 and a second fixed piece 24 on a plate body 22. The plate body 22 is disposed on the lower end surface of the left and right frames 19, and at this time, the pair of first fixed pieces 23, 23 are fitted into the retaining grooves 11 of the inner part 12 of the left and right frames 19, and the second fixed piece 24 is fitted into the hollow part 13a of the outer part 13, thereby being fixed. The first fixed pieces 23 are located on both sides of the panel 18 fitted and held in the retaining groove 11, and are fitted tightly between the groove bottom wall 11a of the retaining groove 11 and the guide rib 12a.

[0038] Incidentally, the method of fixing the seat 21 is not limited to this, and other methods are possible. Even if it is configured as in the specific example shown in the figure, it may be configured to be fixed by either the first fixed piece 23 or the second fixed piece 24.

[0039] According to the second comparative example, as shown in Fig. 6(C), the plate body 22 of the seat 21 constituting the sliding portion 20 has a predetermined thickness t1, so that when the sliding door 5B is mounted on the lower rail 6b, the lower non-retaining edge portion 18b of the panel 18 is raised so as not to come into contact with the groove bottom of the lower rail 6b. In other words, as shown in Fig. 6(A), a gap s1 equivalent to the thickness t1 is formed between the groove bottom of the lower rail 6b and the non-retaining edge portion 18b.

[0040] The bottom surface of plate body 22 forms a sliding surface that easily slides on the bottom of the groove of lower rail 6b, so that when the sliding door 5B is moved to open or close, the bottom surface of plate body 22 slides smoothly with a light force while being placed on the bottom of the groove of lower rail 6b.

[0041] Incidentally, the sliding door 17B of the second comparative example also does not have a member equivalent to the lower horizontal frame 9 of the prior art, so even when the space between the existing window 2 and the inner window 4 becomes hot due to sunlight, the door does not suffer from the problem of bowing due to thermal expansion as in the prior art. Furthermore, by providing the sliding portion 20 at the lower ends of the left and right frames 19, 19, a gap s1 is formed between the non-retaining edge portion 18b of the panel 18 and the groove bottom of the lower rail 6b, allowing the sliding door 17B to open and close smoothly.

[0042] However, in the case of the second comparative example, the gap s1 is formed, which causes a problem that the insulating function that is the original purpose of the inner window is reduced.

[0043] As mentioned above, the inner window 4 is installed on the indoor side of the existing window 2, and has the purpose of insulating the indoor temperature by blocking the space inside the existing window 2, which becomes hot due to sunlight. In this case, the lower part of the space is exposed to direct sunlight and becomes hotter than the upper part.

[0044] In this regard, as shown in Figures 7 and 8, in the sliding door 17B of the second comparative example, a gap s1 is formed between the groove bottom of the lower rail 6b and the non-retaining edge 18b, and a gap z1 is also formed between the non-retaining edge 18b and the standing wall 6w of the lower rail 6b. Therefore, as shown in the figures, heat moves freely from the outside side XO facing the existing window to the inside side XI. That is, the warm air on the outside side XO enters and passes through the gap s1 as shown by the arrow IN, and flows to the inside side XI through the gap z1 as shown by the arrow OUT.

[0045] (Embodiments of the present invention) 9 to 17 show an embodiment of the present invention, which provides a sliding door 17C that solves the problem of the second comparative example described above.

[0046] The sliding door 17C is formed by holding both left and right side edges of the panel 18 only with left and right frames 19, 19, and in this respect is similar to the sliding door 17A of the first comparative example and the sliding door 17B of the second comparative example, and the configurations of the panel 18 and the left and right frames 19 are also the same, so they are denoted with the same reference numerals. Therefore, like the first and second comparative examples, the upper and lower edges of the panel 18 in the sliding door 17C are formed with upper non-holding edges 18a and lower non-holding edges 18b.

[0047] The lower ends 19b, 19b of the left and right frames 19, 19 are formed with a sliding portion 20 constituted by a seat 21 that slidably contacts the bottom of the groove of the lower rail 6b. This is similar to the sliding door 17B of the second comparative example, and the configuration of the sliding portion 20 is also the same, so the same reference numerals are used.

[0048] Therefore, in the sliding door 17C of the present invention, with respect to the front surface F facing the room and the back surface R facing the outside (existing window), an upper decorative panel 25 made of synthetic resin is attached to the front surface F of the panel 18 along the upper non-retaining edge 18a, and a lower decorative panel 26 made of synthetic resin is attached to the lower non-retaining edge 18b. As a result, the upper non-retaining edge 18a is overlapped with the front surface over its entire length with the upper decorative panel 25, and the lower non-retaining edge 18b is overlapped with the front surface over its entire length with the lower decorative panel 26.

[0049] (First embodiment) 9-16 show a first embodiment of the decorative plate 26. As shown, the lower decorative plate 26 projects downward from the lower non-retaining edge 18b to form a shielding edge 26a adjacent the groove bottom of the lower rail 6b.

[0050] In the illustrated embodiment, the upper decorative panel 25 and the lower decorative panel 26 are made of the same material and are adhered to the upper non-retaining edge 18a and the lower non-retaining edge 18b, respectively, by an adhesive means such as adhesive tape.

[0051] When adhering the lower decorative panel 26 to the lower non-retaining edge portion 18b, the lower edge of the decorative panel 26 can be adhered in a state where it protrudes downward from the non-retaining edge portion 18b, thereby easily forming the shielding edge portion 26a.

[0052] In the illustrated embodiment, the upper decorative panel 26 is adhered with its top edge aligned with the top edge of the upper non-retaining edge 18a, but this may or may not be the case.

[0053] As a means for overlapping and fixing the decorative panels 25, 26 to the front faces of the non-retaining edges 18a, 18b, it is preferable to provide an adhesive means 27 such as a double-sided adhesive tape in advance on the overlapping surfaces of the decorative panels 25, 26. The adhesive tape constituting the adhesive means 27 may be provided over the entire length of the decorative panels 25, 26, but is preferably provided at least in the longitudinal center of the decorative panels 25, 26 as shown in Fig. 12(A).

[0054] 12(B), the decorative panels 25, 26 are in surface contact over their entire length in front of the non-retaining edges 18a, 18b, with both ends facing the elastic lips 14 of the left and right frames 19, 19. For this reason, when the panel 18 is attempted to be curved toward the outside of the room so that its cross section bulges in a bow shape, the glued central portion of the decorative panels 25, 26 in the longitudinal direction follows the panel, but the ends of both sides that are not glued are in contact with the elastic lips 14 of the left and right frames 19, 19 and brace themselves, suppressing the bending deformation of the panel 18.

[0055] (Action and Effects) The sliding door 17C configured in this manner has the following effects. (1) Because the sliding door 17C does not have a component equivalent to the lower horizontal frame 9 of the prior art, even when the space between the existing window 2 and the inner window 4 becomes hot due to sunlight, the door does not bend into a bow shape due to thermal expansion as in the prior art. In this case, even if the non-retaining edge 18b of the panel 18 bends toward the outside of the room, there is a relatively large gap between the non-retaining edge 18b and the groove wall of the lower rail 6b, so the door will not be pressed against the groove wall and will not interfere with opening and closing the sliding door 17C. (2) A sliding portion 20 is formed at the lower ends 19b, 19b of the left and right frames 19, 19, and the lower surface of the non-retaining edge portion 18b on the lower side of the panel 18 is raised so as not to come into contact with the bottom of the groove of the lower rail 6b, thereby enabling the sliding door 5C to be opened and closed smoothly. (3) Furthermore, the heat insulating function is not reduced between the lower rail 6b.

[0056] 14 and 15 show the heat insulating effect of the sliding door 17C having the decorative panel 26 according to the first embodiment.

[0057] As shown in Fig. 15, the lower non-retaining edge 18b of the panel 18 is raised by the slide portion 20 provided at the lower end of the left and right frames 19 relative to the groove bottom of the lower rail 6b. However, the shielding edge 26a of the lower decorative panel 26 superposed and fixed to the front surface protrudes from the non-retaining edge 18b toward the groove bottom, and as a result, the space between the groove bottom of the lower rail 6b and the non-retaining edge 18b is narrowed to a gap s2. In other words, compared to the gap s1 in the second comparative example, s2 <s1とされている。

[0058] Moreover, the gap formed between the non-retaining edge portion 18b and the upright wall 6w of the lower rail 6b is narrowed to a gap z2 by inserting the decorative plate 26 having a predetermined thickness. <z1とされている。

[0059] For this reason, as shown in the figure, the transfer of heat is prevented from the outdoor side XO facing the existing window to the indoor side XI. That is, as shown by the arrow IN in the figure, the warm air from the outdoor side XO enters the underside of the non-retaining edge 18b, but is blocked by the shielding edge 26a, preventing it from flowing to the indoor side XI.

[0060] Second embodiment Figures 16(A) and (B) show a second embodiment of the decorative panel 26, which has a shielding edge portion 26a similar to the first embodiment described above, and further has a rib 26b protruding from the shielding edge portion 26a in the groove width direction of the lower rail 6b.

[0061] As shown in FIG. 16(A), the rib 26b may project toward the lower surface of the non-retaining edge 18b of the panel 18, or as shown in FIG. 16(B), it may project toward the upright wall 6w on the indoor side of the lower rail 6b. Further, although not shown, it may be formed to have a T-shaped cross section extending from the shielding edge 26a toward both sides.

[0062] Since the decorative plate 26 is formed by the rib 26b so as to be difficult to deform into an arcuate shape, it is possible to suppress the panel 18 from curving due to heat from the outdoor side.

[0063] (Third Embodiment) FIG. 16(C) shows a third embodiment of the decorative plate 26. The decorative plate 26 does not have the shielding edge 26a described above, but is provided with a thick portion 26c toward the upright wall 6w on the indoor side of the lower rail 6b. In order to provide the thick portion 26c, the entire decorative plate 26 may be formed to be thick, or as shown in the figure, only the portion facing the upright wall 6w may be formed to be thick.

[0064] Thereby, the gap formed between the non-retaining edge 18b of the panel 18 and the upright wall 6w of the lower rail 6b is narrowed to the gap z3 by the thick portion 26c. That is, z3 < z2 < z1 with respect to the gap z1 of the second comparative example and the gap z2 of the first embodiment, and as shown by the arrow IN in the figure, the warm air below the non-retaining edge 18b is prevented from flowing to the indoor side.

[0065] And since the thick portion 26c makes it difficult to deform the decorative plate 26 into an arcuate shape, it is possible to suppress the panel 18 from curving due to heat from the outdoor side.

[0066] (Another Embodiment of the Present Invention) FIG. 17 shows another embodiment of the sliding door according to the present invention.

[0067] The sliding door 5C of the present invention does not necessarily require the configurations of the upper non-retaining edge portion 18a and the upper decorative panel 25 provided in the above embodiment. For this reason, the sliding door 5C may be configured such that the upper edge portion of the panel 18 is retained by an upper horizontal frame 8 similar to the above-mentioned conventional technology, as shown in Fig. 17. [Explanation of symbols]

[0068] 1 stile 1a upper side stile 1b Lower side stile 1c Stiles 2 Existing windows 3. Sliding Door 4. Inner Window 5. Sliding Door 6a Upper rail 6b Lower rail 6w Rail Standing Wall 7 Vertical Frame 8 Upper horizontal frame 9 Lower horizontal frame 9A Outer wall 10 Panel 11 Retaining groove 11a Groove bottom wall 12 Inner part 12a Guide rib 13 Outer part 13a Hollow part 14 Elastic Lip 15 Sheet Board 16 Web Board 17A Sliding door (first comparative example) 17B Sliding door (second comparative example) Panel 18 18a Upper non-retaining edge 18b Lower non-retaining edge 19 Left and right frames 19a top end 19b Bottom end 20 Slide section 21 Seating equipment 22 Plate 23 1st fixed piece 24 Second fixed piece 17C Sliding door (present invention) 25 Upper decorative panel 26 Lower decorative panel 26a Shielding edge 26b Rib 26c Thick part 27 Adhesion means

Claims

1. This sliding door is an insulating interior window device that is installed on the interior side of an existing window, and is formed of a synthetic resin panel (18) and left and right frames (19), (19) made of synthetic resin moldings that hold both left and right side edges of the panel, and is configured to be slidably fitted between grooved upper rails (6a) and lower rails (6b). The lower edge of the panel (18) is located between the lower ends (19b) of the left and right frames and forms a non-retained edge (18b) that is not retained by the molding material; The lower ends (19b) (19b) of the left and right frames form slide portions (20) that slidably contact the groove bottom of the lower rail (6b), and the non-retaining edge portion (18b) of the panel is configured to rise up without contacting the groove bottom of the lower rail (6b), A sliding door in an interior window device, characterized in that a synthetic resin decorative panel (26) is attached to the front (F) of the panel facing the interior of the room and to the back side facing the existing window, along the non-retaining edge portion (18b).

2. The sliding door in an interior window device as described in claim 1, characterized in that the decorative panel (26) has a shielding edge portion (26a) protruding downward from the non-retaining edge portion (18b) and thereby adjacent to the groove bottom of the lower rail.

3. 3. The sliding door in an interior window device according to claim 2, wherein the shielding edge portion (26a) of the decorative panel (26) is provided with a rib (26b) protruding in the groove width direction of the lower rail (6b).

4. A sliding door in an interior window device as described in claim 1, 2 or 3, characterized in that the decorative panel (26) is in face contact with the non-retaining edge portion (18b) of the panel in the longitudinal direction, and the decorative panel and the non-retaining edge portion are bonded to each other at least in the longitudinal center portion.

5. The left and right frames (19), (19) are made of a synthetic resin molded material integrally formed with an inner portion (12) having a retaining groove (11) into which the side edge of the panel is fitted, and a hollow outer portion (13) forming a groove bottom wall of the retaining groove, The lower ends (19b) of the left and right frames are fixed to the seats (21) to form the slide portions (20). A sliding door in an interior window device as described in claims 1, 2 or 3, characterized in that the seat (21) comprises a plate body (22) arranged on the lower end surfaces of the left and right frames, and fixing pieces (23, 24) standing from the plate body and inserted into at least one of the retaining groove (11) and the hollow portion (13a) on the outer side.

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