JPH0543037B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for manufacturing a steel door with a daylight window, and relates to a method for manufacturing a steel door with a daylight window, and when a daylight window is provided in the entrance door or interior door of a building, condominium, apartment, private residence, etc. used for.

(Prior art) It is known that when the corner radius of a lighting window is less than about 20 mm, distortion or cracking will occur at the opening corners of the drawn panel, spoiling the aesthetic appearance of the door. For this reason, conventional steel doors with daylight windows have been manufactured, for example, by the following two methods.

The first method, as shown in FIG. 11, is to form surface plates d and e in which daylight window openings b and c are formed, respectively, on both sides of a frame body a. In this method, a bending allowance g is formed inside each bending line f of an opening c of one surface plate e, with both ends cut out by dimensions L and M, respectively, from each corner of the opening c. And this bending allowance g
is bent into an L-shape, and the tip of each bend ( _g1) is brought into contact with the inner surface of the other surface plate (d) attached to the frame (a) and integrally formed by welding, thereby manufacturing a steel door with a lighting window. (For example, in 1987-
(See Publication No. 77478).

In the second method, as shown in FIG. 12, the front and back panels A are divided into four panel pieces A ₁ to _{A 4} by lines parallel to each side forming the lighting window opening B.
The top and bottom of each divided panel piece A ₁ to _{A 4} ,
Alternatively, the left and right sides are bent in the same direction, and the two folded panel pieces A ₁ and A ₂ are separated by the width dimension of the opening B and fixed to a frame (not shown) by adhesive or other means, and the remaining panel pieces A ₃ , By inserting A ₄ into the upper and lower ends of the fixed panel pieces A ₁ and A ₂ and fixing them to both the frame and the panel pieces A ₁ and A ₂ by adhesive or other means, you can create a steel door with a lighting window. construction was in progress.

(Problems to be Solved by the Invention) In the former method described in the prior art, even if each bending allowance g of the opening c of the surface plate e is bent inward, the front surface of each corner of the opening c Although no distortion or plate cracking occurs in the face plate e, when installing window glass for daylight in the opening c, each bending allowance g
Not only will the cut-out portions at both ends of the opening c be visible from the outside of the surface plate e, significantly detracting from the beauty of the door with a daylight window, but it will also fail to meet the requirements for class B fire doors. There was an inconvenience in that each corner of the opening c where the periphery, at least the notch part, was visible from the outside had to be made invisible from the outside using a glass holding member that also served as a decorative edge and protruded outward from the surface plate e. .

In addition, in the latter method, since the periphery of the opening B is formed by bending each of the divided panel pieces _A1 to _A4 , stress concentration on the front and back panels A at each corner of the opening B is caused. Although distortion and plate cracking will not occur, when manufacturing a door with a daylight window using this method, the front and back panels A are formed by combining panel pieces A ₁ to A ₄ , which are each divided into four pieces. There must be.

For this reason, compared to the case where the same door is made using a single front and back panel A, not only does the number of man-hours for cutting the panel increase, but during assembly, the positioning of the divided panel pieces _A1 to _A4 , In addition, the number of man-hours required for these operations is also added, resulting in the disadvantage that the cost required to manufacture the door becomes relatively high. Moreover, each panel piece A ₁ to _{A 4} was completed after a lot of man-hours.
Since bonding lines a to d are visible from the outside on the bonding surface of the door, there is a problem in that the aesthetic appearance of the door is also impaired.

The present invention has been made in view of the above-mentioned problems of the conventional technology, and its purpose is to solve the problem of notches provided at the corners of openings and divisions divided along the openings of lighting windows. A steel door with a daylight window that improves the aesthetic appearance by preventing the joining lines of the panels from being seen from the outside, and that can easily meet the requirements of a Class B fire door and can be made efficiently and inexpensively with less man-hours. The present invention aims to provide a method for manufacturing.

(Means for Solving the Problems) The present invention has been made to solve the above-mentioned problems, and provides a double-sided flush door in which the corner radius of the drawing line of the lighting window portion is formed by drawing to approximately 20 mm or less. An opening with a flange allowance of approximately 8 times or more of the panel board thickness is provided inside the aperture line of the lighting window portion of at least one of the front and rear panels, and each corner of the aperture line is provided at each corner of the opening. A corner flange allowance whose shortest distance from the center of the curved portion of Both panels are bent inward at the aperture lines and the flange edges are bent, and then fixed to the door frame and the lighting window frame using adhesive or other means, and the lighting window frame integrated with both panels is illuminated. This is a method for manufacturing a steel door with a daylight window by inserting and holding a window glass.

It is preferable that the flange allowances on the inside of the drawing lines have the same dimensions and be approximately 8 times or more the panel thickness.

Furthermore, the two sets of flange allowances on the inner side of the draw line may be such that one is approximately 8 times or more the panel thickness and the other is approximately 8 times or less the panel thickness.

(Function) When a steel door with a daylight window is made using the above manufacturing method, the flange allowance along each aperture line of the daylight window is set to a size that is at least 8 times the panel thickness, which is necessary for the structure of the door. In this case, the corner flange allowance at each corner of the lighting window should be approximately 8 times or less the thickness of the panel without distortion due to the drawing process, and the roundness formed at the tip of the cut or notch should be Since board cracking does not occur at the corner flange, the beauty of the front and back panels will not be impaired.

(Example) Examples will be described with reference to the drawings.

In Figures 1 to 6, the front panel 1 and the back panel 2 are made of steel plates with a panel thickness of about 0.5 to 1.6 mm.For example, wood grain steel plates, leather embossed steel plates, special Decorative steel plates such as embossed steel plates and painted steel plates are used, but instead of the decorative steel plates, steel plates that have been painted with a finish after drawing or assembly may be used.

When forming the lighting window 3 of a set size on the front panel 1 by drawing, there is a hole approximately 8 times the thickness of the panel inside the rectangular drawing line 4 that determines the size of the lighting window 3. Thereafter, an opening 6 is punched out leaving a flange allowance 5 of about 3 mm, for example. The front panel 1 in which the opening 6 has been punched is drawn inward along the rectangular drawing line 4, and a pair of upper, lower, left and right flange allowances 5, 5 inside the drawing line 4 are drawn at right angles to the front panel 1. Fold it in the direction of the shape. In drawing the front panel 1, since the dimension of the flange allowance 5 is approximately 8 times or less than the panel thickness, distortion due to stress concentration occurs at each corner of the drawing line 4 of the front panel 1, spoiling the aesthetic appearance. There is no possibility that plate cracking will occur at the corner portion of the flange allowance 5.

The size of the daylighting window 7 formed on the back panel 2 is slightly larger than the daylighting window 3 formed on the front panel 1, in order to facilitate the attachment and holding of the daylighting wired window glass 16. The flange allowance 10 between the drawing line 8 of the part 7 and the opening 9 punched inside the drawing line 8 is larger than eight times the panel thickness, for example, about 18 mm, which is about half the thickness of the door.

When the flange allowance 10 is approximately 8 times or more the panel thickness, the shortest distance of the corner flange allowance 11 from the center of the curved part of each corner of the drawing line 8 of the back panel 2 to each corner of the opening 9 is determined as the panel thickness. Cuts 12 are provided from each corner of the aperture 9 to the center of the curved portion of each corner of the aperture line 8 so that the width is approximately 8 times or less. A small-diameter round hole 13 is formed at the tip of the cut 12 in order to prevent plate cracking in the corner flange allowance 11 on the extension line of the cut 12 when the back panel 2 is drawn along the drawing line 8. It is provided.

This cut 12 may be cut out in various shapes as shown in other embodiments to be described later. In this case, the small diameter round hole 13 provided at the tip of the cut 12 is formed at the tip of the various cutouts. An arc-shaped curve is formed.

The rear panel 2 having the above configuration is subjected to drawing processing, and each flange margin 10 is bent inward at right angles along the rectangular drawing line 8. In the back panel 2 that has undergone this drawing process, the cuts 12 provided in each flange margin 10 have a V-shape that widens inward (see Figure 5), so the lighting window 7 can be extended to each corner. Stress concentration is alleviated, creating a beautiful aesthetic appearance with no distortion. In addition, the round hole 13 provided at the tip of the cut 12 is effective in preventing plate cracking from occurring in the corner flange allowance 11 on the extension line of the cut 12 when the cut 12 is expanded into a V-shape by drawing. Therefore, the lighting window portion 7 improves the aesthetic appearance not only on the back panel 2 side but also on each flange margin 10 side.

The front panel 1 and the back panel 2 have a lighting window section 3,
7, both upper and lower ends are bent in the right angle direction, and the left and right ends are bent in the right angle direction along the end surface of the door frame 14 after the portions protruding outward from the door frame 14 are folded back. (See FIGS. 2 and 3) The front panel 1 and rear panel 2 configured as described above are fixed to the door frame 14 and the lighting window frame 15 by adhesive or other means. The procedure is to place the door frame 14 and the lighting window frame 15 in that order on the inner surface of the back panel 2, which has been coated with adhesive, and then place the front panel 1, whose inner surface has been coated with adhesive, on the inner surface of the back panel 2. This is done by stacking them on top and pressing them together with a press.

The lighting window frame 15 has a shape in which two members having a U-shaped cross section are oriented in opposite directions so as to share one side, and the wired glass 16 for lighting is attached to the opposing U-shaped portions on the front panel 1 side. However, other configurations may also be used.

A leaf spring member 17 having a Z-shaped cross section is screwed to the upper and lower frames of the lighting window frame 15 on the inner surface of the front panel 1 side, and a plurality of plate spring members 17 are screwed to the inner surface of the lower frame side at appropriate intervals. A glass receiver 18 is provided. As shown in the figure (see FIGS. 7 and 8), the leaf spring member 17 is formed so that the distance between it and the flange margin 10 becomes narrower as it faces toward the back panel 2, and then the most distal end of the leaf spring member 17 is formed near the flange. It is bent in the direction in which the distance between the width and the width 10 becomes wider.

The wired glass 16 attached to the opposing U-shaped parts of the lighting window frame 15 is made of glass packing made of PVC, rubber, etc., or putty 1 filled in the space between them.
9 is maintained. Lighting window section 7 of back panel 2
Between both longitudinal ends of and the leaf spring members 17, 17
A glass presser 20 with a U-shaped cross section and a vertical line slightly inclined inward is removably attached to the glass presser 20, which is covered with a decorative cover 21 whose surface has the same decorative steel plate pattern as the back panel 2. The space of the cut 12 widened in the shape of a letter and the round hole 13 are not visible from the outside to improve the aesthetic appearance. The glass presser 20 has an engagement hole 2 on the side that contacts the flange allowance 10.
2 is provided, and is locked by a protrusion 17a of the leaf spring member 17 that elastically engages with this engagement hole 22. (See Figure 8).

The glass presser 20 may be made using the same decorative steel plate as the back panel 2, and in this case, the decorative cover 21 can be omitted. In addition, the glass retainer 20, which is installed in a slightly sunken state from the surface of the back panel 2 in this embodiment, may be installed so as to protrude outward from the surface of the back panel 2, or may be installed with a slanted U-shaped cross section. Of course, the vertical lines may be deformed so as not to be slanted to create a design change.

FIG. 9 shows another embodiment of this invention,
When the dimensions of the flange allowance at both the top and bottom ends of the lighting window section of the back panel are the same as the dimensions of the flange allowance at both the left and right ends, and both the dimensions of both flange allowances are approximately 8 times larger than the panel thickness. be.

In this case, a cutout of a certain width, for example, about 3 mm, is made in a direction inclined at about 45 degrees from the vertical line from the corner of the opening 9 toward the center of the curved part of each corner of the aperture line 8 of the lighting window. 23 so that the corner flange allowance 11 is approximately 8 times or less the panel thickness.

FIG. 10 shows still another embodiment of the present invention, in which the flange allowance at both the upper and lower ends of the lighting window section of the rear panel is approximately 8 times or less than the panel thickness, and the flange allowance at both the left and right ends is the panel thickness. In this case, it is almost eight times or more.

In this case, the corner flange allowance 11 at each corner of the opening 9 of the rear panel 2 is approximately 8 mm of the panel thickness.
What is necessary is to provide a notch 23a in the shape of a right triangle with a rounded tip that is less than double the size.

Note that the application of the present invention in each of the above embodiments has been described in the case where the flange width of the back panel is approximately 8 times or more the thickness of the panel. Of course, it can also be applied to cases where the thickness is approximately 8 times or more than the plate thickness.

(Effect of the invention) Since this invention is configured as described above,
This produces the following effects.

In the method for manufacturing a steel door with a lighting window according to claims 1 to 3, when the flange allowance inside the aperture line of the lighting window portion is approximately 8 times or more the panel thickness,
At each corner of the opening of the panel with the flange allowance, a cut or notch with a rounded tip is provided so that the corner flange allowance is approximately 8 times or less the panel thickness, so it is formed by drawing. To prevent the occurrence of distortion or plate cracking due to concentration of stress at each corner of the lighting window part, and it is possible to extremely easily produce a door with a lighting window with excellent aesthetic appearance.

In addition, there is no need to divide the front panel or back panel into two or more parts to form the lighting window.
The number of processing steps such as shearing, pressing, and assembling each panel can be significantly reduced, and a door with a daylight window can be manufactured extremely efficiently.

In addition, the flange allowances for the front panel, back panel, and lighting window are narrowed inward before the door is assembled, so when assembling a door with a lighting window,
It is possible to easily position the lighting window frame.

In addition, a corner flange allowance of approximately 8 times the panel thickness or less was formed at each corner of the lighting window.
When installing a glass retainer inside the opening, not only can the overlap length with the flange length be lengthened, but also the top surface of the glass retainer can be installed so that it does not protrude from the panel surface, so it is suitable for doors with daylight windows. This makes it easier to add fire protection and change the design of the lighting window.

Furthermore, the corner flange allowance formed at each corner of the opening is formed so that the shortest distance from the center of the curved part of each corner of the drawing line is approximately 8 times or less than the panel thickness, making drawing processing easier. In addition to being easy to draw, it also prevents distortion from occurring during the drawing process, making it possible to provide a steel door with fewer manufacturing steps and without seams in corners where material gaps and plate distortions are likely to occur. Ta. Furthermore, by forming the corner flange allowance, when drawing is performed, the notch portions are not exposed at both ends of the bending allowance, making it possible to provide a steel door that can be used as a fire door.

[Brief explanation of the drawing]

Fig. 1 is a front view of a door with a daylight window manufactured by the method of the present invention, Fig. 2 is a sectional view of Fig. 1, Fig. 3 is a sectional view of Fig. 1, and Fig. 4 is a drawing process. FIG. 5 is a partially enlarged front view showing the state of the front back panel, FIG. 5 is a perspective view of the main part showing the state after the drawing process, FIG. 6 is a perspective view of the main part showing the state when the glass presser is attached, and FIG. The figure is a cross-sectional side view of the leaf spring member, Figure 8 is a cross-sectional side view showing the state of engagement between the leaf spring member and the glass presser, and Figures 9 and 10 are different implementations of the back panel before drawing. A partially enlarged front view showing an example, and FIGS. 11 and 12 are an exploded perspective view and a front view of different conventional examples, respectively. 1...Front panel, 2...Rear panel, 3, 7
...Lighting window section, 4, 8...Aperture line, 5,10...
Flange allowance, 6, 9... Opening, 11... Corner flange allowance, 12... Cut, 14... Door frame, 15
...Daylighting window frame, 16...Daylighting (wired) window glass, 23, 23a...Notch.

Claims (1)

[Scope of Claims] 1. In a double-sided flush door in which the corner radius of the aperture line of the daylight window is formed by drawing to approximately 20 mm or less, from the aperture line of the daylight window on at least one of the front and rear panels. Approximately 8 panels thick on the inside
An opening is provided with a flange allowance of at least double that of the opening, and a corner flange allowance is provided at each corner of the opening so that the shortest distance from the center of the curved part of each corner of the aperture line is approximately 8 times or less the panel thickness. Both panels with the above structure are bent inward at the drawing lines by drawing, and both panels with their flange margins bent are used as door frames and daylight windows. A method for producing a steel door with a daylight window, characterized in that the daylight window glass is fixed to the frame using adhesive or other means, and the daylight window glass is inserted and held in the daylight window frame, which is integrated with both panels. . 2. The method for manufacturing a steel door with a daylight window according to claim 1, wherein the two sets of flange allowances on the inside of the drawing line have the same size. 3. The method for manufacturing a steel door with a daylight window according to claim 1, wherein the two sets of flange allowances on the inside of the drawing line are approximately 8 times or more the panel thickness, and the other is 8 times or less.