Louver door and method for assembling louver door

Abstract

To provide a louver door capable of preventing the lowering of strength and mounting necessary parts while making a slim design by narrowing the width of a stile when viewed from the surface side.SOLUTION: A louver door 10 having left and right vertical stiles 11, 12, upper and lower horizontal stiles 13, 14, and a plurality of blades 1 arranged between the left and right vertical stiles 11,12, in which the left and right vertical stiles 11, 12 have a substantially L-shaped cross-section consisting of an outer peripheral section and a back surface section, a concave section into which the blades 1 are inserted is formed in the inner surface of the outer peripheral section of the left and right vertical stiles 11, 12, a thick section is formed in the back surface section of the left and right vertical stiles 11, 12, and a notch section for avoiding the blades 1 is formed in the thick section, and the upper and lower horizontal stiles 13, 14 have a substantially L-shaped cross-section consisting of an outer peripheral section and a back surface section.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a louver door and a method for assembling a louver door. [Background technology]

[0002] Traditionally, louver doors have been used, which are made up of left and right vertical frames, top and bottom horizontal frames, and multiple louvers arranged between the left and right vertical frames, allowing for good ventilation and light to enter.

[0003] As an invention related to louver doors, Patent Document 1 describes a prefabricated louver door in which the ends of a louver plate 1 are fitted into mounting portions 6a, 6b provided on the opposing side walls of pillar-shaped stiles 3a, 3b.

[0004] Patent Document 2 describes a louver shutter that is configured by inserting a slat 5 into an engagement hole drilled diagonally on the inside of a vertical frame 3 of a frame main body 2. It also describes a simulated slat 6 that also serves as a center rail.

[0005] Patent Document 3 describes a wooden door having ventilation louvers L. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Utility Model Application Publication No. 51-027445 [Patent Document 2] Japanese Utility Model Application Publication No. 51-008646 [Patent Document 3] JP 2002-121976 A Summary of the Invention [Problem to be solved by the invention]

[0007] Incidentally, conventional louver doors use thick, square, pillar-shaped frames to ensure their robustness, which makes the frame appear wider when viewed from the inside of the room (the front side of the louver door), giving the door an unsophisticated impression.

[0008] On the other hand, simply making the frame thinner in an attempt to give a slimmer impression can result in a loss of strength. Louver doors are used in various forms, such as folding doors, swing doors, and sliding doors, and the opening and closing methods vary from single-leaf, double-leaf, and linked, but depending on the type and structure of the door, various parts such as support members such as hoisting wheels, hanging cups, guide pins, hinges, lower runners, push-open, magnetic catches, dampers, meeting devices, and anti-sway devices must be attached, so the frame must be wide and thick enough to attach the parts, and must also be strong enough.

[0009] To solve the above-mentioned problems of the conventional art, the present invention provides a louver door that has a slim design with a narrower frame width when viewed from the front side, while preventing a decrease in strength and allowing the installation of necessary parts. [Means for solving the problem]

[0010] In order to solve the above problems, the louver door of the present invention is a louver door having left and right vertical frames, upper and lower horizontal frames, and a plurality of blades arranged between the left and right vertical frames, wherein the left and right vertical frames have an approximately L-shaped cross section consisting of an outer periphery and a back surface, and a recess is formed on the inner surface of the outer periphery of the left and right vertical frames into which the blades are inserted.

[0011] It is also preferable that a thick portion is formed on the back surface of at least one of the left and right vertical frames, and that a cutout portion for avoiding the blades is formed in the thick portion.

[0012] It is also preferable that the upper and lower horizontal frames each have a substantially L-shaped cross section consisting of an outer periphery and a back surface.

[0013] It is also preferable that the outer peripheries of the left and right vertical frames and the outer peripheries of the upper and lower horizontal frames are fixed, and that the back surfaces of the left and right vertical frames and the back surfaces of the upper and lower horizontal frames are fixed.

[0014] It is also preferable that the upper horizontal frame has a generally L-shaped cross section consisting of an outer periphery and a back surface, and that the blade overlaps the back surface of the upper horizontal frame when viewed from the front side.

[0015] It is also preferable that the upper horizontal frame has an approximately L-shaped cross section consisting of an outer periphery and a back surface, a thick portion is formed on the back surface of the upper horizontal frame, and a notch portion is formed in the thick portion to avoid the blade.

[0016] It is also preferable that at least one of the upper and lower horizontal frames has an inclined portion that is substantially the same as that of the blade.

[0017] It is also preferable that the inclined portion has a thick portion formed thereon.

[0018] The method of assembling a louver door of the present invention is a method of assembling a louver door as described above, characterized in that the outer periphery and back surface of the left and right vertical frames are separate members, the upper and lower horizontal frames are assembled to the back surface of the left and right vertical frames to form a rectangular frame, the outer periphery of one of the left and right vertical frames is assembled to the back surface of the vertical frame, one ends of the multiple blades are inserted into the recesses in the outer periphery of the one vertical frame and the other ends of the multiple blades are inserted into the recesses in the outer periphery of the other vertical frame, and the outer periphery of the other vertical frame is assembled to the back surface of the vertical frame. Effect of the Invention

[0019] The louver door of the present invention has left and right vertical frames, upper and lower horizontal frames, and a plurality of blades arranged between the left and right vertical frames. The left and right vertical frames have an approximately L-shaped cross section consisting of an outer periphery and a back surface, so that when viewed from the front side, only the narrow front surface of the outer periphery of the left and right vertical frames is visible, resulting in a slim design and preventing a decrease in strength. Furthermore, a recess into which the blade is inserted is formed on the inner surface of the outer periphery of the left and right vertical frames, so that the blade can be securely held and assembly is easy. Due to the presence of a back surface portion with an approximately L-shaped cross section, even if the width of the outer periphery of the vertical frame is narrow, necessary parts such as hinges that are wider than the outer periphery can be attached to the vertical frame.

[0020] In addition, by forming a thick portion on the back surface of at least one of the left and right vertical frames, it is possible to ensure the width and thickness required to attach the necessary parts. And by forming a cutout portion in the thick portion to avoid the blades, the blades can be arranged at equal intervals without the need to change the blade attachment position even if a thick portion exists. Also, it is not necessary to prepare a blade with a cutout on the blade side corresponding to the thick portion separately, and a common blade can be used.

[0021] In addition, since the upper and lower horizontal frames have an approximately L-shaped cross section consisting of an outer periphery and a back surface, when viewed from the front side, only the narrow front surface of the outer periphery of the upper and lower horizontal frames is visible, making the frame slim and preventing a decrease in strength.

[0022] In addition, by fixing the outer peripheries of the left and right vertical frames and the outer peripheries of the upper and lower horizontal frames, and by fixing the back surfaces of the left and right vertical frames and the back surfaces of the upper and lower horizontal frames, the left and right vertical frames and the upper and lower horizontal frames can be assembled sturdily.

[0023] In addition, the upper horizontal frame has a roughly L-shaped cross section consisting of an outer periphery and a back surface, and when viewed from the front side, the blades overlap the back surface of the upper horizontal frame, so that the back surface of the upper horizontal frame is not visible from the front side, resulting in a good appearance.

[0024] In addition, the upper horizontal frame has a generally L-shaped cross section consisting of an outer periphery and a back surface, and by forming a thick section on the back surface of the upper horizontal frame, it is possible to ensure the width and thickness required to attach the necessary parts. Furthermore, by forming a notch in the thick section to avoid the blades, the presence of the thick section does not require the blade attachment position to be changed.

[0025] Furthermore, by having at least one of the upper and lower horizontal frames have an inclined portion that is approximately the same as the blade, the horizontal frame can be made to look like a blade, creating a unified design.

[0026] Furthermore, by forming a thick portion on the inclined portion, it is possible to ensure a width and thickness for mounting necessary components.

[0027] In addition, the method of assembling a louver door of the present invention is a method of assembling the above-mentioned louver door, in which the outer periphery and back surface of the left and right vertical frames are separate members, the upper and lower horizontal frames are assembled to the back surface of the left and right vertical frames to form a rectangular frame, the outer periphery of one of the left and right vertical frames is assembled to the back surface of said vertical frame, one ends of multiple blades are inserted into the recesses in the outer periphery of one vertical frame, the other ends of the multiple blades are inserted into the recesses in the outer periphery of the other vertical frame, and the outer periphery of the other vertical frame is assembled to the back surface of said vertical frame, thereby making assembly easy.

[0028] In this way, according to the present invention, it is possible to provide a louver door that has a slim design with a narrow frame width when viewed from the front side, while preventing a decrease in strength and allowing the installation of necessary parts. [Brief description of the drawings]

[0029] [Figure 1] FIG. 1 is a front view showing a folding door using a louver door according to a first embodiment of the present invention. [Diagram 2] (a) is a front view, (b) is a rear view, and (c) is a cross-sectional view taken along line AA, showing a louver door. [Diagram 3] (a) Front view, (b) rear view, and (c) left side view showing the right vertical frame. [Figure 4](a) Enlarged front view, (b) enlarged left side view, (c) enlarged plan view showing the upper part of the right vertical frame, (d) enlarged front view, (e) enlarged left side view, and (f) enlarged bottom view showing the lower part of the right vertical frame. [Diagram 5] (a) Front view, (b) plan view, and (c) left side view showing the upper cross frame. [Figure 6] (a) Front view, (b) bottom view, and (c) left side view showing the lower cross frame. [Figure 7] (a) is a front view, (b) is a plan view, and (c) is a left side view showing the intermediate rail. [Figure 8] (a) is a front view, (b) is a plan view, and (c) is a left side view showing the center rail handle. [Figure 9] (a) is a front view showing the blade, and (b) is a left side view. [Figure 10] (a) Assembly diagram of the upper right part of the louver door, (b) assembly diagram of the lower right part of the louver door. [Figure 11] (a) An enlarged front view of the upper right portion of the louver door, (b) a cross-sectional view taken along line BB, (c) an enlarged front view of the lower right portion of the louver door, and (d) a cross-sectional view taken along line CC. [Figure 12] 1A to 1C are diagrams showing how to assemble the louver door. [Figure 13] FIG. 11 is a front view showing a folding door using a louver door according to a second embodiment of the present invention. [Figure 14] (a) Front view, (b) rear view, and (c) DD line cross-sectional view showing the louver door. [Figure 15] (a) Front view, (b) rear view, and (c) left side view showing the right vertical frame. [Figure 16] (a) Enlarged front view, (b) enlarged left side view, (c) enlarged plan view showing the upper part of the right vertical frame, (d) enlarged front view, (e) enlarged left side view, and (f) enlarged bottom view showing the lower part of the right vertical frame. [Figure 17] (a) Front view, (b) plan view, and (c) left side view showing the upper cross frame. [Figure 18] (a) Front view, (b) bottom view, and (c) left side view showing the lower cross frame. [Figure 19](a) Assembly diagram of the upper right part of the louver door, (b) assembly diagram of the lower right part of the louver door. [Figure 20] (a) An enlarged front view of the upper right portion of the louver door, (b) a cross-sectional view taken along line EE, (c) an enlarged front view of the lower right portion of the louver door, and (d) a cross-sectional view taken along line FF. [Figure 21] FIG. 11 is a front view showing a folding door using a louver door according to a third embodiment of the present invention. [Figure 22] (a) Front view, (b) rear view, and (c) cross-sectional view along line GG showing the louver door. [Figure 23] (a) Front view, (b) rear view, and (c) left side view showing the right vertical frame. [Figure 24] (a) Enlarged front view, (b) enlarged left side view, (c) enlarged plan view showing the upper part of the right vertical frame, (d) enlarged front view, (e) enlarged left side view, and (f) enlarged bottom view showing the lower part of the right vertical frame. [Diagram 25] (a) Front view, (b) plan view, and (c) left side view showing the upper cross frame. [Figure 26] (a) Front view, (b) bottom view, and (c) left side view showing the lower cross frame. [Figure 27] (a) Assembly diagram of the upper right part of the louver door, (b) assembly diagram of the lower right part of the louver door. [Figure 28] (a) An enlarged front view of the upper right portion of the louver door, (b) a cross-sectional view taken along line HH, (c) an enlarged front view of the lower right portion of the louver door, and (d) a cross-sectional view taken along line II. [Figure 29] FIG. 11 is a front view showing a folding door using a louver door according to a fourth embodiment of the present invention. [Diagram 30] Showing a louver door: (a) front view, (b) rear view, (c) cross-sectional view taken along line JJ. [Diagram 31] (a) Front view, (b) rear view, and (c) left side view showing the right vertical frame. [Diagram 32] (a) Enlarged front view, (b) enlarged left side view, (c) enlarged plan view showing the upper part of the right vertical frame, (d) enlarged front view, (e) enlarged left side view, and (f) enlarged bottom view showing the lower part of the right vertical frame. [Diagram 33](a) Front view, (b) plan view, and (c) left side view showing the upper cross frame. [Diagram 34] (a) Front view, (b) bottom view, and (c) left side view showing the lower cross frame. [Diagram 35] (a) Assembly diagram of the upper right part of the louver door, (b) assembly diagram of the lower right part of the louver door. [Diagram 36] (a) An enlarged front view of the upper right part of the louver door, (b) a cross-sectional view taken along line KK, (c) an enlarged front view of the lower right part of the louver door, and (d) a cross-sectional view taken along line LL. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] A louver door according to an embodiment of the present invention will be described with reference to Fig. 1 to Fig. 36. The louver door according to this embodiment is used as a folding door for a closet by combining four louver doors. However, the present invention is not limited to folding doors, and can be applied to various doors such as hinged doors and sliding doors.

[0031] (Embodiment 1) A louver door 10 according to the first embodiment will be described with reference to Figures 1 to 12. Figure 1 is a front view showing a folding door 100 using the louver door 10 according to the first embodiment.

[0032] The folding door 100 is composed of four louver doors 10a, 10b, 10c, and 10d. The left louver doors 10a and 10b are connected by hinges and fold open to the left, and the right louver doors 10c and 10d are connected by hinges and fold open to the right. The upper and lower parts of each louver door 10 are formed with grooves 2 and 3 for hanging cups (not shown) (part of the upper or lower support member, e.g., a mounting member for mounting a hanging wheel or a guide pin). In addition, three grooves 4 for hinges (not shown) are formed in the vertical frame on one side of each louver door 10. Due to the difference in the positions of the grooves 2, 3, and 4, the louver doors 10a and 10c and the louver doors 10b and 10d are symmetrical.

[0033] Next, the louver door 10 will be described in detail. FIG. 2 shows the louver door 10 in (a) a front view, (b) a rear view, and (c) an AA line cross-sectional view. The louver door 10 shown in FIG. 2 is the louver door 10b, 10d in FIG. 1, but the louver doors 10a, 10c are similar except that they are symmetrical. In addition, in the following drawings, the direction shown in FIG. 2(a) is referred to as the front side, and the direction shown in FIG. 2(b) is referred to as the back side. Also, dowel holes (not shown) are formed in each member constituting the louver door 10, and each member is assembled using a dowel (not shown), and reinforced with an adhesive as necessary.

[0034] The louver door 10 is composed of left and right vertical frames 11, 12, upper and lower horizontal frames 13, 14, and multiple blades 1 arranged between the left and right vertical frames 11, 12. In addition, a middle rail 15 and a middle rail handle 16 are provided at two locations in the upper and lower directions to reinforce the door, and a grip part for opening and closing the folding door 100 is formed on the middle rail handle 16 as described later.

[0035] As will be described in detail later, the vertical frames 11, 12 and the horizontal frames 13, 14 are formed in a generally L-shaped cross section, and when the louver door 10 is viewed from the front side, the vertical frames 11, 12 and the horizontal frames 13, 14 are narrow (e.g., 15 mm) in width, giving a slim impression. On the other hand, when viewed from the back side, they are wide (e.g., vertical frames 65 mm, horizontal frames 69 mm). Also, the middle rail 15 and middle rail handle 16 are difficult to see from the front side, but their presence is clearly visible from the back side.

[0036] The blades 1 are attached between the left and right vertical frames 11, 12 at an incline so as to rise from the front side to the back side. The processed grooves 2, 3, 4 are formed from the back side of the louver door 10 toward the thickness direction of the door.

[0037] Fig. 3 is (a) a front view, (b) a rear view, and (c) a left side view showing the right vertical frame 11. Fig. 4 is (a) an enlarged front view, (b) an enlarged left side view, and (c) an enlarged plan view showing the upper part of the right vertical frame 11, and (d) an enlarged front view, (e) an enlarged left side view, and (f) an enlarged bottom view showing the lower part of the right vertical frame 11.

[0038] The vertical frame 11 is a member having a substantially L-shaped cross section, which is composed of a flat outer peripheral portion 11a and a flat back surface portion 11b. The outer peripheral portion 11a is arranged along the side of the louver door 10, with the narrower end face exposed on the front surface side. The back surface portion 11b is arranged along the back surface of the louver door 10, with the wider end face exposed on the back surface side. Therefore, when viewed from the front surface side, only the narrow front surface of the outer peripheral portion 11a of the vertical frame 11 is visible, resulting in a slim design and preventing a decrease in strength.

[0039] A plurality of recesses 11c for inserting the blades 1 are formed on the inner surface of the outer circumferential portion 11a. The recesses 11c have the same shape as the ends of the blades 1, and have a gap large enough to allow the blades to be inserted and a depth large enough to hold the blades. The blades 1 inserted into the recesses 11c are reinforced with adhesive as necessary to ensure that they are held securely.

[0040] In this embodiment, in order to realize the assembly method described later, the outer peripheral portion 11a and the back surface portion 11b are constructed as separate members and are assembled with dowels. Also, by constructing them as separate members, the members can be easily processed. However, instead of constructing them as separate members, they can be formed as a single piece cut out to have an L-shaped cross section.

[0041] 4(a) to 4(c), a groove 2 for attaching a hanging cup is formed in the upper part of the vertical frame 11, and a thick portion 11d is formed in the back surface 11b to ensure the width and thickness of the groove 2. For example, if the depth of the groove 2 is 18 mm and the thickness of the back surface 11b other than the thick portion is 15 mm, the thickness is insufficient, so the thickness of the thick portion 11d is made 20 mm, making it possible to process the groove 2.

[0042] On the other hand, since the thick portion 11d causes the two upper blades to hit the thick portion 11d, a notch 11f (spot facing) and a notch 11g (chamfer) are formed in the thick portion 11d to avoid the blades. Therefore, even if the thick portion 11d exists, it is not necessary to change the mounting position of the blade 1.

[0043] 4(d) to (f), a groove 3 for attaching a hanging cup is formed in the lower part of the vertical frame 11, and a thick part 11e is formed in the back surface part 11b to ensure the width and thickness of the groove 3. For example, if the depth of the groove 3 is 18 mm and the thickness of the back surface part 11b other than the thick part is 15 mm, the thickness is insufficient, so the thickness of the thick part 11e is made 20 mm, which makes it possible to process the groove 3.

[0044] On the other hand, since forming the thick portion 11e causes one of the lower blades to hit the thick portion 11e, a notch 11h (chamfer) is formed in the thick portion 11e to avoid the blade. Therefore, even if the thick portion 11e exists, it is not necessary to change the mounting position of the blade 1.

[0045] Although not shown, the width of the back surface portion 11b is set to be wide (e.g., 50 mm) to enable machining of a groove 4 (e.g., 42 mm wide, 80 mm high, and 8 mm deep) for attaching a hinge.

[0046] The left vertical frame 12 is basically symmetrical to the right vertical frame 11, but differs in the presence and location of the machined grooves 2, 3, and 4. Therefore, since the vertical frame 12 does not have the machined grooves 2 and 3, it is not necessarily necessary to provide a thick portion. However, from the viewpoint of commonality of parts, the same back surface portion 11b can be used.

[0047] 5 shows (a) a front view, (b) a plan view, and (c) a left side view of the upper horizontal frame 13. The horizontal frame 13 is a member with a generally L-shaped cross section, consisting of a flat outer peripheral portion 13a and a flat back surface portion 13b. The outer peripheral portion 13a is disposed along the upper surface of the louver door 10, with the narrower end face exposed on the front surface side. The back surface portion 13b is disposed along the back surface of the louver door 10, with the wider end face exposed on the back surface side.

[0048] Also, the length of the outer periphery 13a in the left-right direction is longer than the length of the back surface 13b in the left-right direction, and as described below, when the vertical frame 11 (12) and the horizontal frame 13 are assembled, they fit together. However, to accommodate the thickness of the thick portion 11d of the vertical frame 11, a slight step is generated at the base of the protruding portion at both ends of the outer periphery 13a of the horizontal frame 13, and the approximately T-shaped plate-shaped portion including this base portion 13c (a portion whose left-right length is the same as that of the back surface 13b) forms the outer periphery 13a.

[0049] 6 shows (a) a front view, (b) a bottom view, and (c) a left side view of the lower horizontal frame 14. The horizontal frame 14 is a member with a generally L-shaped cross section, consisting of a flat outer peripheral portion 14a and a flat back surface portion 14b. The outer peripheral portion 14a is disposed along the underside of the louver door 10, with the narrower end face exposed on the front surface side. The back surface portion 14b is disposed along the back surface of the louver door 10, with the wider end face exposed on the back surface side.

[0050] Also, the length of the outer periphery 14a in the left-right direction is longer than the length of the back surface 14b in the left-right direction, and as described later, when the vertical frame 11 (12) and the horizontal frame 14 are assembled, they fit together. However, to accommodate the thickness of the thick portion 11e of the vertical frame 11, a slight step is generated at the base of the protruding portion at both ends of the outer periphery 14a of the horizontal frame 14, and the roughly T-shaped portion including this base portion 14c (a portion whose left-right length is the same as that of the back surface 14b) forms the outer periphery 14a.

[0051] 7A is a front view, (b) a plan view, and (c) a left side view showing the intermediate rail 15. The intermediate rail 15 is a flat member and is formed thin so that the blades 1 attached to the front side do not come into contact with it.

[0052] 8 shows (a) a front view, (b) a plan view, and (c) a left side view of the center rail handle 16. The center rail handle 16 is a member consisting of an inclined portion 16a and a back surface portion 16b. The inclined portion 16a is formed so as to have substantially the same inclination as the blade 1 when placed on the front surface side during assembly. In addition, a handhold portion 16c is formed at the bottom of the inclined portion 16a for inserting a hand when opening or closing the door. The length of the inclined portion 16a in the left-right direction is longer than the length of the back surface portion 16b in the left-right direction, so that the vertical frames 11, 12 and the center rail handle 16 fit together when they are assembled.

[0053] No blades 1 are arranged on the front side of the center rail handle 16, and when viewed from the front side, the inclined portion 16a of the center rail handle 16 blends in seamlessly between the blades 1 lined up vertically, creating a unified design. Note that a notch is formed at the bottom end of the inclined portion 16a to avoid the adjacent blades 1.

[0054] 9A is a front view and FIG. 9B is a left side view showing the blade 1. The blade 1 is a flat plate-like member, the long sides of which are chamfered.

[0055] Fig. 10(a) is an assembly diagram of the upper right portion of the louver door 10, and Fig. 10(b) is an assembly diagram of the lower right portion of the louver door 10. When assembling the upper right portion of the louver door 10, the inner surface of the outer periphery 11a of the vertical frame 11 and the side surface of the outer periphery 13a of the horizontal frame 13 are abutted against each other to be fixed. Also, the side surface of the back surface 11b of the vertical frame 11 and the side surface of the back surface 13b of the horizontal frame 13 are abutted against each other to be fixed. Note that dowel holes and dowels are used at the parts indicated by arrows in these assembly diagrams for fixing.

[0056] Similarly, when assembling the lower right portion of the louver door 10, the inner surface of the outer periphery 11a of the vertical frame 11 and the side surface of the outer periphery 14a of the horizontal frame 14 are abutted and fixed. Also, the side surface of the back surface 11b of the vertical frame 11 and the right side surface of the back surface 14b of the horizontal frame 14 are abutted and fixed. Then, the blade 1 is inserted into the recess 11c formed on the inner surface of the vertical frame 11. Note that the assembly diagram in FIG. 10 shows the engagement state of the vertical frame and the horizontal frame in the upper right portion and the lower right portion of the louver door, and does not show the assembly order of each member constituting the vertical frame and the horizontal frame. Therefore, an assembly method as shown in FIG. 12 described later is also possible.

[0057] This allows the vertical frame 11 and the horizontal frames 13, 14 to be firmly assembled. The same applies to the vertical frame 12. In addition, the blades 1 overlap the back surface 13b of the horizontal frame 13 and the back surface 14b of the horizontal frame 14, so that the back surfaces 13b, 14b of the horizontal frames 13, 14 are not visible from the front surface side, resulting in a good appearance.

[0058] Figure 11 shows (a) an enlarged front view of the upper right portion of the louver door 10 after the vertical frame 11 and horizontal frames 13 and 14 are assembled, (b) a cross-sectional view along line BB, (c) an enlarged front view of the lower right portion of the louver door 10, and (d) a cross-sectional view along line CC.

[0059] As shown in Figures 11(a) and (b), when the vertical frame 11, horizontal frame 13, and blade 1 are assembled, the machined groove 2 for attaching the hanging cup is within the thickness range of the thick portion 11d, and the cutout portions 11f and 11g prevent the blade 1 from hitting the thick portion 11d.

[0060] Similarly, as shown in Figures 11(c) and (d), when the vertical frame 11, horizontal frame 14, and blade 1 are assembled, the machined groove 3 for attaching the hanging cup is within the thickness range of the thick portion 11e, and the cutout portion 11h prevents the blade 1 from hitting the thick portion 11e.

[0061] Fig. 12 is a diagram showing a method of assembling the louver door 10. Note that Fig. 12 shows only the upper part (vertical frames 11, 12 and horizontal frame 13) of the louver door 10, but the lower part (vertical frames 11, 12 and horizontal frame 14) is assembled in the same manner.

[0062] First, as shown in Fig. 12(a), the upper and lower horizontal frames 13, 14 are assembled to the rear surfaces 11b, 12b of the left and right vertical frames 11, 12 to form a rectangular frame. Next, as shown in Fig. 12(b), the outer periphery 11a of one of the left and right vertical frames 11, 12 (here, the vertical frame 11) is assembled to the rear surface 11b of the vertical frame 11. Then, as shown in Fig. 12(c), one end of the plurality of blades 1 is inserted into the recess 11c of the outer periphery 11a of one vertical frame 11, and the other end of the plurality of blades 1 is inserted into the recess 11c of the outer periphery 12a of the other vertical frame (here, the vertical frame 12), and the outer periphery 12a of the other vertical frame 12 is assembled to the rear surface 12b of the vertical frame 12. The louver door 10 is thus completed. In this way, by making the outer periphery 11a, 12a and the back surface 11b, 12b of the left and right vertical frames 11, 12 separate members, it is possible to easily assemble the louver door 10. Here, the order in which the outer periphery of the left and right vertical frames are assembled may be reversed.

[0063] In the first embodiment, the thickened portion is formed on the vertical frame, but the thickened portion may be formed on the horizontal frame. For example, the back surface of the horizontal frame may be extended to the left and right ends of the louver door (so-called horizontal extension), a thickened portion may be formed on the back surface of the horizontal frame, and a cutout portion for avoiding the blades may be formed in the thickened portion, thereby achieving the same effect as the first embodiment.

[0064] (Embodiment 2) The louver door 20 according to the second embodiment will be described with reference to Fig. 13 to Fig. 20. The same parts as those in the louver door 10 according to the first embodiment will be given the same reference numerals and the description thereof will be omitted. Fig. 13 is a front view showing a folding door 200 using the louver door 20 according to the second embodiment.

[0065] The folding door 200 is constructed by combining four louver doors 20a, 20b, 20c, and 20d. The four louver doors are connected with hinges, processing grooves 2 and 3 for hanging cups are formed, and a processing groove 4 for the hinge is formed, as in the first embodiment.

[0066] Next, the louver door 20 will be described in detail. Fig. 14 shows (a) a front view, (b) a rear view, and (c) a cross-sectional view along line DD of the louver door 20. The louver door 20 is composed of left and right vertical frames 21, 22, upper and lower horizontal frames 23, 24, and multiple blades 1 arranged between the left and right vertical frames 21, 22.

[0067] As will be described in detail later, the vertical frames 21, 22 are formed with a generally L-shaped cross section, and when the louver door 20 is viewed from the front side, the vertical frames 21, 22 are narrow in width, giving a slim impression. On the other hand, when viewed from the back side, the width is wide. In contrast, unlike the first embodiment, the horizontal frames 23, 24 are not generally L-shaped in cross section, and the appearance of the horizontal frames 23, 24 from the front side is different from that of the first embodiment.

[0068] Fig. 15 is (a) a front view, (b) a rear view, and (c) a left side view showing the right vertical frame 21. Fig. 16 is (a) an enlarged front view, (b) an enlarged left side view, and (c) an enlarged plan view showing the upper part of the right vertical frame 21, and (d) an enlarged front view, (e) an enlarged left side view, and (f) an enlarged bottom view showing the lower part of the right vertical frame 21.

[0069] The vertical frame 21 is a member having a substantially L-shaped cross section, which is composed of a flat outer peripheral portion 21a and a flat back surface portion 21b. The outer peripheral portion 21a is arranged along the side surface of the louver door 20, and the narrow end surface is exposed on the front surface side. The back surface portion 21b is arranged along the back surface of the louver door 20, and the wide end surface is exposed on the back surface side. Therefore, when viewed from the front surface side, only the narrow front surface of the outer peripheral portion 21a of the vertical frame 21 is visible, resulting in a slim design and preventing a decrease in strength. A plurality of recesses 21c for inserting the blades 1 are formed on the inner surface of the outer peripheral portion 21a.

[0070] As shown in Figures 16(a) to (c), a machined groove 2 for attaching a hanging cup is formed in the upper part of the vertical frame 21. However, unlike the first embodiment, no thickened portion is formed to ensure the width and thickness of the machined groove 2. Similarly, as shown in Figures 16(d) to (f), a machined groove 3 for attaching a hanging cup is formed in the lower part of the vertical frame 21, but no thickened portion is formed. In other words, the thickness of the back surface portion 21b of the vertical frame 21 is the same from top to bottom.

[0071] 17 shows (a) a front view, (b) a plan view, and (c) a left side view of the upper horizontal frame 23. The horizontal frame 23 is a member having an inclined portion 23a and a back surface portion 23b. The inclined portion 23a is formed so as to have substantially the same inclination as the blade 1 when it is placed on the front surface side during assembly. In addition, a thick portion 23c is formed between the inclined portion 23a and the back surface portion 24b, and a notch portion 23d is formed below the thick portion 23c.

[0072] The left-right length of the inclined portion 23a is longer than the left-right length of the back surface portion 23b, so that they fit together when the vertical frames 21, 22 and the horizontal frame 23 are assembled. The left-right length of the inclined portion 23a is slightly longer than the left-right length of the thick portion 23c. The cross-sectional shape of the protruding portion is the same as that of the blade 1, and the right end of the inclined portion 23a is inserted into the recess 21c of the vertical frame 21, as described later.

[0073] 18 shows (a) a front view, (b) a plan view, and (c) a left side view of the lower horizontal frame 24. The horizontal frame 24 is a member having an inclined portion 24a and a back surface portion 24b. The inclined portion 24a is formed so as to have substantially the same inclination as the blade 1 when it is arranged on the front surface side during assembly. In addition, a thick portion 24c is formed between the inclined portion 24a and the back surface portion 24b.

[0074] The left-right length of the inclined portion 24a is longer than the left-right length of the back surface portion 24b, so that they fit together when the vertical frames 21, 22 and the horizontal frame 24 are assembled. The left-right length of the inclined portion 24a is slightly longer than the left-right length of the thick portion 24c. The cross-sectional shape of the protruding portion is the same as that of the blade 1, and the right end of the inclined portion 24a is inserted into the recess 21c of the vertical frame 21, as described later.

[0075] Fig. 19(a) is an assembly diagram of the upper right portion of the louver door 20, and Fig. 19(b) is an assembly diagram of the lower right portion of the louver door 20. When assembling the upper right portion of the louver door 20, the inner surface of the outer periphery 21a of the vertical frame 21 is brought into contact with the right side surface of the thick portion 23c of the horizontal frame 23, and the right end of the inclined portion 23a is inserted into the recess 21c and fixed. Also, the side surface of the back surface portion 21b of the vertical frame 21 is brought into contact with the right side surface of the back surface portion 23b of the horizontal frame 23, and fixed.

[0076] Similarly, when assembling the lower right portion of the louver door 20, the inner surface of the outer periphery 21a of the vertical frame 21 is brought into contact with the right side surface of the thick portion 24c of the horizontal frame 24, and the right end of the inclined portion 24a is inserted into the recess 21c and fixed. Also, the side surface of the back surface portion 21b of the vertical frame 21 is brought into contact with the right side surface of the back surface portion 24b of the horizontal frame 24, and fixed. Then, the blade 1 is inserted into the recess 21c formed on the inner surface of the vertical frame 21. Note that the assembly diagram in FIG. 19 shows the engagement state of the vertical frame and the horizontal frame in the upper right and lower right portions of the louver door, and does not show the assembly order of the members constituting the vertical frame and the horizontal frame. Therefore, the assembly method shown in FIG. 12 described above is also possible.

[0077] This allows the vertical frame 21 and the horizontal frames 23, 24 to be firmly assembled. The same applies to the vertical frame 22. Also, the upper and lower ends of the louver door 20 have exposed inclined portions 23a, 24a, making it appear as if the blades 1 are continuous to the upper and lower ends.

[0078] Figure 20 shows (a) an enlarged front view of the upper right portion of the louver door 20 after the vertical frame 21 and horizontal frames 23 and 24 are assembled, (b) a cross-sectional view along line EE, (c) an enlarged front view of the lower right portion of the louver door 20, and (d) a cross-sectional view along line FF.

[0079] As shown in Figures 20(a) and (b), when the vertical frame 21, horizontal frame 23, and blade 1 are assembled, the machined groove 2 for attaching the hanging cup is within the thickness range of the thick portion 23c, and the cutout portion 23d prevents the blade 1 from hitting the thick portion 23c.

[0080] Similarly, as shown in Figures 20(c) and (d), when the vertical frame 21, horizontal frame 24, and blade 1 are assembled, the processed groove 3 for attaching the hanging cup is within the thickness range of the thick portion 24c.

[0081] (Embodiment 3) A louver door 30 according to the third embodiment will be described with reference to Fig. 21 to Fig. 28. The same parts as those in the louver door 10 according to the first embodiment will be given the same reference numerals and the description thereof will be omitted. Fig. 21 is a front view showing a folding door 300 using the louver door 30 according to the third embodiment.

[0082] The folding door 300 is constructed by combining four louver doors 30a, 30b, 30c, and 30d. The four louver doors are connected with hinges, processing grooves 2 and 3 for hanging cups are formed, and a processing groove 4 for the hinge is formed, as in the first embodiment.

[0083] Next, the louver door 30 will be described in detail. Fig. 22 shows (a) a front view, (b) a rear view, and (c) a cross-sectional view along line GG of the louver door 30. The louver door 30 is composed of left and right vertical frames 31, 32, upper and lower horizontal frames 33, 34, and multiple blades 1 arranged between the left and right vertical frames 31, 32.

[0084] As will be described in detail later, the vertical frames 31, 32 are formed with a generally L-shaped cross section, and when the louver door 30 is viewed from the front side, the vertical frames 31, 32 are narrow in width, giving a slim impression. On the other hand, when viewed from the back side, the width is wide. In contrast, unlike the first embodiment, the horizontal frames 33, 34 are not generally L-shaped in cross section, but the appearance of the horizontal frames 33, 34 from the front side is almost the same as that of the first embodiment.

[0085] Fig. 23 is (a) a front view, (b) a rear view, and (c) a left side view showing the right vertical frame 31. Fig. 24 is (a) an enlarged front view, (b) an enlarged left side view, and (c) an enlarged plan view showing the upper part of the right vertical frame 31, and (d) an enlarged front view, (e) an enlarged left side view, and (f) an enlarged bottom view showing the lower part of the right vertical frame 31.

[0086] The vertical frame 31 is a member having a substantially L-shaped cross section, which is composed of a flat outer peripheral portion 31a and a flat back surface portion 31b. The outer peripheral portion 31a is arranged along the side surface of the louver door 30, and the narrow end surface is exposed on the front surface side. The back surface portion 31b is arranged along the back surface of the louver door 30, and the wide end surface is exposed on the back surface side. Therefore, when viewed from the front surface side, only the narrow front surface of the outer peripheral portion 31a of the vertical frame 31 is visible, resulting in a slim design and preventing a decrease in strength. A plurality of recesses 31c for inserting the blades 1 are formed on the inner surface of the outer peripheral portion 31a.

[0087] Furthermore, the vertical length of the outer circumferential portion 31a is longer than the vertical length of the back surface portion 31b, and the upper and lower ends of the outer circumferential portion 31a protrude vertically beyond the back surface portion 31b, so that the vertical frames 31, 32 and the horizontal frames 33, 34 fit together when assembled.

[0088] As shown in Figures 24(a) to (c), no groove 2 for attaching a hanging cup is formed in the upper part of the vertical frame 31. Similarly, as shown in Figures 24(d) to (f), no groove 3 for attaching a hanging cup is formed in the lower part of the vertical frame 31.

[0089] 25 shows (a) a front view, (b) a plan view, and (c) a left side view of the upper horizontal frame 33. The horizontal frame 33 is a member having an outer peripheral portion 33a, a back surface portion 33b, and an inclined portion 33c. The outer peripheral portion 33a is disposed along the upper surface of the louver door 30, with the narrower end face exposed on the front surface side. The back surface portion 33b is disposed along the back surface of the louver door 30, with the wider end face exposed on the back surface side.

[0090] The inclined portion 33c is formed so as to have substantially the same inclination as the blade 1 when it is arranged on the front surface side during assembly. In addition, a thick portion 33d is formed between the inclined portion 33c and the back surface portion 33b, and a notch portion 33e is formed below the thick portion 33d. The lengths in the left-right direction of the outer circumferential portion 33a, the back surface portion 33b, the inclined portion 33c, and the thick portion 33d are the same.

[0091] Figure 26 shows (a) a front view, (b) a plan view, and (c) a left side view of the lower horizontal frame 34. The horizontal frame 34 is a member having an outer peripheral portion 34a, a back surface portion 34b, and an inclined portion 34c. The outer peripheral portion 34a is disposed along the underside of the louver door 30, with the narrower end face exposed on the front surface side. The back surface portion 34b is disposed along the back surface of the louver door 30, with the wider end face exposed on the back surface side.

[0092] The inclined portion 34c is formed so as to have substantially the same inclination as the blade 1 when it is arranged on the front surface side during assembly. In addition, a thick portion 34d is formed between the inclined portion 34c and the back surface portion 34b. The outer peripheral portion 34a, the back surface portion 34b, the inclined portion 34c, and the thick portion 34d have the same length in the left-right direction.

[0093] Fig. 27(a) is an assembly diagram of the upper right portion of the louver door 30, and Fig. 27(b) is an assembly diagram of the lower right portion of the louver door 30. When assembling the upper right portion of the louver door 30, the inner surface of the outer periphery 31a of the vertical frame 31 and the entire side surface of the horizontal frame 33 are abutted and fixed. Also, the upper end surface of the back surface 31b of the vertical frame 31 and the lower end surface of the back surface 33b of the horizontal frame 33 are abutted and fixed.

[0094] Similarly, when assembling the lower right portion of the louver door 30, the inner surface of the outer periphery 31a of the vertical frame 31 and the entire side surface of the horizontal frame 34 are abutted and fixed. The lower end surface of the back surface 31b of the vertical frame 31 and the upper end surface of the back surface 34b of the horizontal frame 34 are abutted and fixed. Then, the blade 1 is inserted into the recess 31c formed on the inner surface of the vertical frame 31. Note that the assembly diagram in FIG. 27 shows the engagement state of the vertical frame and the horizontal frame in the upper right and lower right portions of the louver door, and does not show the assembly order of the members constituting the vertical frame and the horizontal frame. Therefore, the assembly method shown in FIG. 12 described above is also possible.

[0095] This allows the vertical frame 31 and the horizontal frames 33, 34 to be firmly assembled. The same applies to the vertical frame 32. Furthermore, at the upper and lower ends of the louver door 30, outer peripheries 33a, 34a are exposed as narrow horizontal frames, and wing-shaped inclined portions 33c, 34c are exposed, giving the appearance of a series of wings surrounded by narrow upper and lower horizontal frames and left and right vertical frames.

[0096] Figure 28 shows (a) an enlarged front view of the upper right portion of the louver door 30 after the vertical frame 31 and horizontal frames 33 and 34 are assembled, (b) a cross-sectional view along line HH, (c) an enlarged front view of the lower right portion of the louver door 30, and (d) a cross-sectional view along line II.

[0097] As shown in Figures 28(a) and (b), when the vertical frame 31, horizontal frame 33, and blade 1 are assembled, the machined groove 2 for attaching the hanging cup is within the thickness range of the thick portion 33d, and the cutout portion 33e prevents the blade 1 from hitting the thick portion 33d.

[0098] Similarly, as shown in Figures 28(c) and (d), when the vertical frame 31, horizontal frame 34, and blade 1 are assembled, the processed groove 3 for attaching the hanging cup is within the thickness range of the thick portion 34d.

[0099] (Embodiment 4) A louver door 40 according to the fourth embodiment will be described with reference to Fig. 29 to Fig. 36. Note that the same parts as those in the louver door 10 according to the first embodiment will be given the same reference numerals and the description thereof will be omitted. Fig. 29 is a front view showing a folding door 400 using the louver door 40 according to the fourth embodiment.

[0100] The folding door 400 is constructed by combining four louver doors 40a, 40b, 40c, and 40d. The four louver doors are connected with hinges, processing grooves 2 and 3 for hanging cups are formed, and a processing groove 4 for the hinge is formed, as in the first embodiment.

[0101] Next, the louver door 40 will be described in detail. Fig. 30 shows (a) a front view, (b) a rear view, and (c) a cross-sectional view taken along line JJ of the louver door 40. The louver door 40 is composed of left and right vertical frames 41, 42, upper and lower horizontal frames 43, 44, and multiple blades 1 arranged between the left and right vertical frames 41, 42.

[0102] As will be described in detail later, the vertical frames 41, 42 are formed with a generally L-shaped cross section, and when the louver door 40 is viewed from the front side, the vertical frames 41, 42 are narrow in width, giving a slim impression. On the other hand, when viewed from the back side, the width is wide. In contrast, unlike the first embodiment, the horizontal frames 43, 44 are not generally L-shaped in cross section, but the appearance of the horizontal frames 43, 44 from the front side is almost the same as that of the first embodiment.

[0103] Fig. 31 is (a) a front view, (b) a rear view, and (c) a left side view showing the right vertical frame 41. Fig. 32 is (a) an enlarged front view, (b) an enlarged left side view, and (c) an enlarged plan view showing the upper part of the right vertical frame 41, and (d) an enlarged front view, (e) an enlarged left side view, and (f) an enlarged bottom view showing the lower part of the right vertical frame 41.

[0104] The vertical frame 41 is a member having a substantially L-shaped cross section, which is composed of a flat outer peripheral portion 41a and a flat back surface portion 41b. The outer peripheral portion 41a is arranged along the side surface of the louver door 40, and the narrow end surface is exposed on the front surface side. The back surface portion 41b is arranged along the back surface of the louver door 40, and the wide end surface is exposed on the back surface side. Therefore, when viewed from the front surface side, only the narrow front surface of the outer peripheral portion 41a of the vertical frame 41 is visible, resulting in a slim design and preventing a decrease in strength. A plurality of recesses 41c for inserting the blades 1 are formed on the inner surface of the outer peripheral portion 41a.

[0105] Furthermore, the vertical length of the outer circumferential portion 41a is longer than the vertical length of the back surface portion 41b, and the upper and lower ends of the outer circumferential portion 41a protrude vertically beyond the back surface portion 41b, so that the vertical frames 41, 42 and the horizontal frames 43, 44 fit together when assembled.

[0106] As shown in Figures 32(a) to (c), no groove 2 for attaching a hanging cup is formed in the upper part of the vertical frame 41. Similarly, as shown in Figures 32(d) to (f), no groove 3 for attaching a hanging cup is formed in the lower part of the vertical frame 41.

[0107] 33 shows (a) a front view, (b) a plan view, and (c) a left side view of the upper horizontal frame 43. The horizontal frame 43 is a member having an outer peripheral portion 43a, a back surface portion 43b, and an inclined portion 43c. The outer peripheral portion 43a is disposed along the upper surface of the louver door 40, with the narrower end face exposed on the front surface side. The back surface portion 43b is disposed along the back surface of the louver door 40, with the wider end face exposed on the back surface side.

[0108] The inclined portion 43c is formed so as to have substantially the same inclination as the blade 1 when arranged on the front surface side during assembly. In addition, a thick portion 43d is formed between the inclined portion 43c and the back surface portion 43b. The outer peripheral portion 43a, the back surface portion 43b, the inclined portion 43c, and the thick portion 43d have the same length in the left-right direction.

[0109] Figure 34 shows (a) a front view, (b) a plan view, and (c) a left side view of the lower horizontal frame 44. The horizontal frame 44 is a member having an outer peripheral portion 44a, a back surface portion 44b, and an inclined portion 44c. The outer peripheral portion 44a is disposed along the upper surface of the louver door 40, with the narrower end face exposed on the front surface side. The back surface portion 44b is disposed along the back surface of the louver door 40, with the wider end face exposed on the back surface side.

[0110] The inclined portion 44c is formed so as to have substantially the same inclination as the blade 1 when arranged on the front side during assembly. In addition, a thick portion 44d is formed between the inclined portion 44c and the back surface portion 44b. The outer peripheral portion 44a, the back surface portion 44b, the inclined portion 44c, and the thick portion 44d have the same length in the left-right direction.

[0111] Fig. 35(a) is an assembly diagram of the upper right portion of the louver door 40, and Fig. 35(b) is an assembly diagram of the lower right portion of the louver door 40. When assembling the upper right portion of the louver door 40, the inner surface of the outer periphery 41a of the vertical frame 41 and the entire side surface of the horizontal frame 43 are abutted and fixed. Also, the upper end surface of the back surface 41b of the vertical frame 41 and the lower end surface of the back surface 43b of the horizontal frame 43 are abutted and fixed.

[0112] Similarly, when assembling the lower right portion of the louver door 40, the inner surface of the outer periphery 41a of the vertical frame 41 and the entire side surface of the horizontal frame 44 are abutted and fixed. The lower end surface of the back surface 41b of the vertical frame 41 and the upper end surface of the back surface 44b of the horizontal frame 44 are abutted and fixed. Then, the blade 1 is inserted into the recess 41c formed on the inner surface of the vertical frame 41. Note that the assembly diagram in FIG. 35 shows the engagement state of the vertical frame and the horizontal frame in the upper right portion and the lower right portion of the louver door, and does not show the assembly order of each member constituting the vertical frame and the horizontal frame. Therefore, the assembly method shown in FIG. 12 described above is also possible.

[0113] This allows the vertical frame 41 and the horizontal frames 43, 44 to be firmly assembled. The same applies to the vertical frame 42. In addition, the upper and lower ends of the louver door 40 have exposed inclined portions 43a, 44a, making it appear as if the blades 1 are continuous.

[0114] Figure 36 shows (a) an enlarged front view of the upper right portion of the louver door 40 after the vertical frame 41 and horizontal frames 43, 44 are assembled, (b) a cross-sectional view along line KK, (c) an enlarged front view of the lower right portion of the louver door 40, and (d) a cross-sectional view along line LL.

[0115] As shown in Figures 36(a) and (b), when the vertical frame 41, horizontal frame 43, and blade 1 are assembled, the processed groove 2 for attaching the hanging cup is within the thickness range of the thick portion 43d.

[0116] Similarly, as shown in Figures 36(c) and (d), when the vertical frame 41, horizontal frame 44, and blade 1 are assembled, the processed groove 3 for attaching the hanging cup is within the thickness range of the thick portion 44d.

[0117] In this way, in any of the above embodiments, a processed groove for attaching a hanging cup can be provided within the thickness range of the thick portion, and the processed groove can be provided after assembly as a louver door, or by previously processing each component before assembly.

[0118] The louver door according to the embodiment of the present invention has left and right vertical frames, upper and lower horizontal frames, and a plurality of blades arranged between the left and right vertical frames. The left and right vertical frames have an approximately L-shaped cross section consisting of an outer periphery and a back surface, so that when viewed from the front side, only the narrow front surface of the outer periphery of the left and right vertical frames is visible, resulting in a slim design and preventing a decrease in strength. Furthermore, a recess into which the blade is inserted is formed on the inner surface of the outer periphery of the left and right vertical frames, so that the blade can be securely held and assembly is easy. Due to the presence of the back surface portion having an approximately L-shaped cross section, even if the width of the outer periphery of the vertical frame is narrow, necessary parts such as hinges wider than the outer periphery can be attached to the vertical frame.

[0119] In addition, by forming thick sections on the backs of the left and right vertical frames, it is possible to ensure the width and thickness required to attach the necessary parts. And by forming cutouts in the thick sections to avoid the blades, the blades can be arranged at equal intervals without the need to change the blade attachment positions even if there are thick sections. Also, it is not necessary to prepare blades with cutouts on the blade side corresponding to the thick sections separately, and common blades can be used.

[0120] In addition, since the upper and lower horizontal frames have an approximately L-shaped cross section consisting of an outer periphery and a back surface, when viewed from the front side, only the narrow front surface of the outer periphery of the upper and lower horizontal frames is visible, making the frame slim and preventing a decrease in strength.

[0121] In addition, by fixing the outer peripheries of the left and right vertical frames and the outer peripheries of the upper and lower horizontal frames, and by fixing the back surfaces of the left and right vertical frames and the back surfaces of the upper and lower horizontal frames, the left and right vertical frames and the upper and lower horizontal frames can be assembled sturdily.

[0122] In addition, the upper and lower horizontal frames have an approximately L-shaped cross section consisting of an outer periphery and a back surface, and when viewed from the front side, the blades overlap the back surfaces of the upper and lower horizontal frames, so that the back surfaces of the upper and lower horizontal frames are not visible from the front side, resulting in a good appearance.

[0123] In addition, the upper and lower horizontal frames have a cross section that is roughly L-shaped, consisting of an outer periphery and a back surface, and by forming thick sections on the back surfaces of the upper and lower horizontal frames, it is possible to ensure the width and thickness required to attach the necessary parts. Furthermore, by forming cutouts in the thick sections to avoid the blades, the presence of the thick sections does not require the blade attachment position to be changed.

[0124] In addition, since the upper and lower horizontal frames have inclined portions that are approximately the same as the blades, the horizontal frames can be made to look like blades, creating a unified design.

[0125] Furthermore, by forming a thick portion on the inclined portion, it is possible to ensure a width and thickness for mounting necessary components.

[0126] In addition, the method of assembling the louver door according to an embodiment of the present invention involves making the outer periphery and back surface of the left and right vertical frames separate components, assembling the upper and lower horizontal frames to the back surface of the left and right vertical frames to form a rectangular frame, assembling the outer periphery of one of the left and right vertical frames to the back surface of that vertical frame, inserting one end of multiple blades into the recess in the outer periphery of one vertical frame, inserting the other ends of the multiple blades into the recess in the outer periphery of the other vertical frame, and assembling the outer periphery of the other vertical frame to the back surface of that vertical frame, thereby enabling easy assembly.

[0127] In this way, the louver door of an embodiment of the present invention has a slim design with a narrow frame width when viewed from the front side, while preventing a decrease in strength and allowing the installation of necessary parts.

[0128] Although the louver door according to the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various other modifications are possible.

[0129] For example, in the above embodiment, the left and right vertical frames are of identical, symmetrical configuration, but depending on the need for a working groove for mounting parts, a thickened portion or a cutout portion may be formed in either the left or right vertical frame.

[0130] In addition, the upper and lower horizontal frames are almost the same in configuration, but the cross-sectional shape of the approximately L-shape, the presence or absence of the inclined portion and the thick portion, etc. may be applied to either one of the upper and lower horizontal frames. Furthermore, the number of blades integrated into the horizontal frame may be changed from one to multiple as appropriate. However, since the configuration in the thickness direction of the louver door becomes asymmetric, the dimensional change rate of the front side and the back side of the louver door will be different, and if the integrated member becomes wider in the vertical direction of the door (the direction perpendicular to the fiber direction of the wood used), there is a risk of the louver door warping in the vertical direction. Therefore, in a configuration in which the horizontal frame or blade is made of wood and the fiber direction is the left-right direction of the louver door, the number of blades integrated into the horizontal frame is preferably about one to three in consideration of strength so that the dimensions of the member in which the horizontal frame and blade are integrated do not become wider in the vertical direction of the louver door, and one is preferable in consideration of warping only.

[0131] Depending on the position of the working groove for mounting the parts, the thickened portion or the cutout portion may be formed in a portion other than the end portion of the vertical and horizontal frames. [Explanation of symbols]

[0132] 1 Feather 2 Machining groove 3 Machining groove 4 Machining groove 10 Louver Door 11 Vertical frame 11a Outer periphery 11b Back part 11c Recess 11d Thick part 11e Thick part 11f Cutout 11g Notch 11h Cutout 12 Vertical frame 13 Side stile 13a Outer periphery 13b Back part 13c Base 14 Side stile 14a Outer periphery 14b Back part 14c Base 15 Intermediate rail 16 Center rail handle 16a Slope 16b Back part 16c Clues 20 Louver Door 21 Vertical frame 21a Outer periphery 21b Back part 21c Recess 22 Vertical frame 23 Side stile 23a Slope 23b Back part 23c Thick part 23d Cutout 24a Slope 24b Back part 24c Thick part 30 Louver Door 31 Vertical frame 31a Outer periphery 31b Back part 31c Recess 32 Vertical frame 33 Side stile 33a outer periphery 33b Back part 33c Slope 33d Thick section 33e Cutout 34 Side stile 34a outer periphery 34b Back part 34c Slope 34d thick part 40 Louver Door 41 Vertical frame 41a Outer periphery 41b Back part 41c Recess 42 Vertical frame 43 Side stile 43a Outer periphery 43b Back part 43c Slope 43d Thick part 44 Side stile 44a Outer periphery 44b Back part 44c Slope 44d Thick part 100 Folding Door 200 Folding Door 300 Folding Door 400 Folding Door

Claims

1. A louver door having left and right vertical frames, upper and lower horizontal frames, and a plurality of blades arranged between the left and right vertical frames, A louver door is characterized in that the left and right vertical frames have an approximately L-shaped cross section consisting of an outer periphery and a back surface, and a recess is formed on the inner surface of the outer periphery of the left and right vertical frames into which the blades are inserted.

2. 2. The louver door according to claim 1, wherein a thick portion is formed on the back surface of at least one of the left and right vertical frames, and a cutout portion is formed in the thick portion to avoid the blades.

3. 2. The louver door according to claim 1, wherein the upper and lower horizontal frames each have an approximately L-shaped cross section consisting of an outer periphery and a back surface.

4. The louver door according to claim 3, characterized in that the outer peripheries of the left and right vertical frames and the outer peripheries of the upper and lower horizontal frames are fixed, and the back surfaces of the left and right vertical frames and the back surfaces of the upper and lower horizontal frames are fixed.

5. A louver door as described in claim 1, characterized in that the upper horizontal frame has an approximately L-shaped cross section consisting of an outer periphery and a back surface, and when viewed from the front side, the blades overlap the back surface of the upper horizontal frame.

6. A louver door as described in claim 1, characterized in that the upper horizontal frame has an approximately L-shaped cross section consisting of an outer periphery and a back surface, a thick portion is formed on the back surface of the upper horizontal frame, and a cutout portion is formed in the thick portion to avoid the blades.

7. 2. The louver door according to claim 1, wherein at least one of the upper and lower horizontal frames has a slope that is approximately the same as that of the blade.

8. The louver door according to claim 7, wherein a thick portion is formed on the inclined portion.

9. 2. A method for assembling the louver door according to claim 1, comprising the steps of: a first end of the first vertical frame and a second end of the second vertical frame that are spaced apart from each other by ...

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