JP2004239019A - Door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door, in which the welding of the headers of four corner sections, sanding machine finish or the like is not required and which can be manufactured easily. <P>SOLUTION: In the door 1 in which at least upper-lower horizontal piece sections 3 and left-right vertical piece sections 4 are formed to a steel plate 2 by cutting and notching the plate 2 in specified shapes and these sections 3 and sections 4 are bent at a right angle to the rear side, the four corner sections 7 of the door 1 are formed by bending projecting piece sections 8 formed at both end sections in the longitudinal direction of the sections 4 at the right angle to the inside. Accordingly, the headers of the sections 3 and the headers of the sections 4 are not exposed in the connections of the corner sections 7, and an appearance is improved. Consequently, a welding for concealing the headers and works, in which the welding sections are finished by a sander, are not required, thus reducing the labor of a manufacture. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a door formed by bending a steel plate.
[0002]
[Prior art]
A single-sided flash door made of a steel plate is used for a pipe shaft, a meter box, a trunk room, and the like installed in a common part (corridor or the like) of an apartment house (apartment).
[0003]
As shown in FIG. 9, the door is formed by cutting and notching a steel plate 2 into a predetermined shape to form at least upper and lower horizontal pieces 3 and left and right vertical pieces 4 in the steel sheet. The one part 4 is bent at right angles to the back side. Specifically, the galvanized steel sheet 2 is cut and cut into a predetermined shape to form at least the upper and lower horizontal pieces 3 and the left and right vertical pieces 4 in the steel sheet. 4 is bent at a right angle to the back side. In this case, the fore-edge (plate edge) 40 of the upper and lower horizontal pieces 3 is exposed at the connection (the joint between the upper and lower side parts and the left and right side parts) of the four-sided corner part 7 (when the door is opened). Looks bad) and looks bad. Therefore, in order to hide the fore edge 40, the fore edge 40 is welded, and the welded portion is finished with a sander (electric file). The door is finished by applying rust-proof painting at a factory, and then installing and finishing painting at a construction site.
[0004]
As a technique related to a steel plate door, a double-sided flush door is generally known (see, for example, JP-A-7-91152).
[0005]
[Patent Document 1]
JP-A-7-91152
[Problems to be solved by the invention]
However, there is a problem in that the door requires welding, sanding, and the like at the small corners of the four-sided corners, so that it takes time to manufacture the door. In addition, since the door involves welding, a painted steel plate such as a color steel plate whose coating is peeled off by welding heat cannot be adopted, and the present situation is that a finish coating is applied at a building site.
[0007]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a door that does not require welding of small edges at four-sided corners, sanding, or the like, and can reduce the labor of manufacturing.
[0008]
[Means for Solving the Problems]
The present invention relates to a door formed by cutting and notching a steel sheet into a predetermined shape to form at least upper and lower horizontal pieces and left and right vertical pieces in the steel sheet, and bending the horizontal pieces and the vertical pieces at right angles to the back side. The four corners of the door are formed by bending inwardly perpendicularly protruding pieces formed at both ends in the longitudinal direction of the vertical piece.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1A and 1B are views showing an embodiment of the present invention, in which FIG. 1A is a front perspective view of a door, FIG. 1B is a rear perspective view of the door, and FIG. 2 is a rear perspective view of a main part of the door. FIG. 3 is a development view of a main part of the door. 4 is a schematic longitudinal sectional view showing the state of attachment of the door, FIG. 5 is a sectional view taken along the line AA of FIG. 4, and FIG. 6 is a schematic transverse sectional view showing the state of attachment of the door.
[0010]
In FIG. 1, reference numeral 1 denotes a single-sided flash door which is attached to, for example, a pipe shaft, a meter box, a trunk room, etc. installed in a common part of an apartment house. As shown in FIGS. 2 and 3, the door 1 is formed by cutting and notching a steel plate 2 into a predetermined shape to form at least upper and lower horizontal pieces 3 and left and right vertical pieces 4 in the steel sheet 2. The upper part, the lower part, and the left and right side parts are formed by bending the horizontal piece part 3 and the vertical piece part 4 at right angles to the back side. Edge pieces 5 and 6 are formed adjacent to the edge sides of the horizontal piece 3 and the vertical piece 4, respectively, and these edge pieces 5 and 6 are bent inward at right angles to form a back edge. Have been. As the steel sheet, a normal steel sheet may be used, but for example, a coated (including printed) steel sheet such as a color steel sheet or a baked steel sheet can be used.
[0011]
Corners 7 are formed on all sides of the door 1, and each corner 7 is formed by bending inwardly right-angle protruding pieces 8 formed at both ends in the longitudinal direction of the left and right vertical pieces 4. Is formed. The protruding piece 8 of the present embodiment is formed in a right-angled triangle with the ends of the left and right vertical pieces 4 as bases 10, and the vertical side 11 when folded is the edge pieces 5, 6 of the door 1. Corresponds to position. At the ends of the upper and lower horizontal pieces 3, cutouts 13 corresponding to the protruding pieces 8 when bent are formed, and the ends of the horizontal edge pieces 5 are formed with the vertical edge pieces 6. Cut to size. Note that, in FIG. 3, broken lines indicate locations where the valleys are folded.
[0012]
In order to increase the strength of the door 1 formed by bending the steel plate 2 as described above, the inner surface of each corner 7 of the door 1 is reinforced with an L-shaped cross section as shown in FIGS. Back plates 14 are arranged, and each back plate 14 is fixed to the horizontal piece 3 and the vertical piece 4 by a fixing tool, for example, a screw 15 (or a rivet or an adhesive). In addition, a reinforcing aggregate 16 having a U-shaped cross section and both side edges bent outward is attached to the center of the back surface of the door 1 along the longitudinal direction (vertical direction) with a double-sided adhesive tape. A part of both ends in the longitudinal direction of 16 is fixed to the upper and lower edge pieces 5 with screws 17.
[0013]
The door 1 is rotatably mounted on a frame 20 including an upper frame 20a, a lower frame 20b, and left and right vertical frames 20c via upper and lower pivot shaft members 21 and 22. The upper and lower pivot shaft members 21 and 25 are fixed to the inner surface of the vertical piece portion 4 on one side of the door 1 with screws 23, and the shaft portions 21 a and 22 a of the upper and lower horizontal piece portions 3 and It protrudes from the upper surface and the lower surface through a hole 24 formed at or near the mating portion. The upper frame 20a and the lower frame 20b are formed with holes 25 and 26 for inserting the shafts 21a and 22a and rotatably supporting the shafts 21a and 22a, and the upper frame 20a is provided with a bearing 27 for supporting the shaft 21a. Have been.
[0014]
The building frame is provided with upper and lower base aggregates 28a and 28b corresponding to the upper frame 20a and the lower frame 20b, and left and right base aggregates 28c corresponding to the left and right vertical frames 20c. An upper frame 20a, a lower frame 20b, and left and right vertical frames 20c are fixed to these base aggregates 28a, 28b, 28c with screws 29,30. 4 to 6, reference numeral 31 denotes a corner fixing member disposed at a corner between the base aggregates 28a, 28b, 28c and the frame 20.
[0015]
According to the door 1 having the above configuration, the steel plate 2 is cut and cut into a predetermined shape to form at least the upper and lower horizontal pieces 3 and the left and right vertical pieces 4 in the steel sheet 2. The door is formed by bending the vertical piece 4 to the back side at right angles, and the four corners 7 of the door 1 are bent inward at right angles to the protruding pieces 8 formed at both longitudinal ends of the vertical piece 4. Therefore, at the connection (joint between the horizontal piece and the vertical piece) of the four-sided corner 7, the small edge (plate edge) of the upper and lower horizontal pieces 3 and the small edge of the left and right vertical pieces 4 are formed. The (plate edge) is not exposed, and the appearance is good (the design can be improved). For this reason, welding for hiding the fore edge and work for finishing the welded portion with a sander are not required, and the labor required for manufacturing can be reduced as compared with the conventional door (reduction in the construction period and cost). Can be achieved).
[0016]
Further, since the manufacturing of the door 1 does not involve (use) welding, the steel plate 2 may be a coated (including printed) steel plate such as a color steel plate or a baked steel plate. By adopting painted steel plates, it is possible to omit factory rust-preventive painting and on-site finishing painting, thereby further shortening the construction period and reducing costs. In particular, by eliminating welding, sanding, factory rust prevention coating and on-site finishing coating, the manufacturing process can be simplified, cost merit, process merit and safety merit can be improved, and the design can be further improved. There are benefits. In addition, even when the back plate 14 for reinforcing the corner portion of the door 1 is attached, the reinforcing aggregate 16 is attached, and the frame body 20 is attached, the above-described effect can be obtained because welding is not used.
[0017]
FIG. 7 is a perspective view of a principal part rear side of a door showing another embodiment, and FIG. 8 is a development view of a principal part of the door. In the present embodiment, the projecting pieces 8 formed at both ends of the left and right vertical pieces 4 are not right-angled triangles having the ends of the vertical pieces 4 as bases 10, but the ends of the vertical pieces 4 as bases ( It is formed in a trapezoid shape with the lower bottom being 10. The protruding piece 8 has an upper side (upper bottom) 35 parallel to the base 10, a vertical side 36 at one end, and an oblique side 37 at the other end. Notches 38 corresponding to the protruding pieces 8 are formed at both ends of the horizontal piece 3. Also in the present embodiment, at the connection at the four corners (joint between the folded horizontal piece and the vertical piece), the small edge (plate edge) of the upper and lower horizontal pieces 3 and the small edge of the left and right vertical pieces 4 The (plate edge) is not exposed, and the same effect as in the above embodiment can be obtained.
[0018]
As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the present invention is not limited to the above embodiments, and various design changes and the like can be made without departing from the gist of the present invention. is there.
[0019]
【The invention's effect】
In short, according to the present invention, a steel sheet is cut and cut into a predetermined shape to form at least upper and lower horizontal pieces and left and right vertical pieces in the steel sheet, and these horizontal pieces and the vertical pieces are perpendicular to the back side. A bent door, wherein the four corners of the door are formed by bending the protruding pieces formed at both ends in the longitudinal direction of the vertical piece inward at right angles, so that This eliminates the need for welding, sanding, and the like, and can reduce the time and effort of manufacturing.
[Brief description of the drawings]
FIG. 1 is a view showing a door according to an embodiment of the present invention, wherein (a) is a front perspective view and (b) is a back perspective view.
FIG. 2 is a rear side perspective view showing a main part of a door.
FIG. 3 is a development view of a main part of the door.
FIG. 4 is a schematic vertical cross-sectional view showing a mounting state of a door.
FIG. 5 is a sectional view taken along the line AA of FIG. 4;
FIG. 6 is a schematic cross-sectional view showing a mounting state of a door.
FIG. 7 is a perspective view of a main part rear surface side of a door showing another embodiment.
FIG. 8 is a development view of a main part of the door.
FIG. 9 is a back side perspective view illustrating a main part of a conventional door.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door 2 Steel plate 3 Horizontal piece 4 Vertical piece 7 Corner 8 Protrusion

Claims (1)

A door formed by cutting and notching a steel sheet into a predetermined shape to form at least upper and lower horizontal pieces and left and right vertical pieces on the steel sheet, and bending these horizontal pieces and the vertical pieces at right angles to the back side, The door according to claim 1, wherein four corners of the door are formed by bending inwardly rightward projections formed at both ends in the longitudinal direction of the vertical piece.

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