JPH0555677B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a metal flush door that is highly productive and has excellent fire resistance.

[Prior art and problems to be solved by the invention]

Generally, some metal flush doors of this kind are formed using a pair of front and back face plates having a wide area and a backbone interposed between the face plates. In this case, the backbone is made of a steel material with a hat-shaped cross section, for example, and has a front and back split type structure, and the bottom portions of both backbones, which face each other and butt against each other, are bonded together with an adhesive such as Epokin adhesive. However, in this one,
It has the disadvantage that it has poor fire resistance, and the adhesive part may peel off in the event of a fire or the like. Therefore, as shown in Japanese Utility Model Application Publication No. 56-121877, roughly L-shaped midribs were fixed to the front and back face plates, and cutouts were formed in each of the midribs, so that one midrib was attached to the other. We have proposed a system in which the backbone is fixed by pushing the face plate into engagement with the face plate, and it has achieved a certain degree of effectiveness. In order to assemble it, a large press device is required to match the size of the face plate, and as a result, the equipment inevitably becomes large and the work is difficult, which is a problem.

[Means to solve the problem]

In view of the above-mentioned circumstances, it is an object of the present invention to provide a metal flush door that can eliminate these drawbacks, and which has a core structure interposed between a pair of facing face plates. In this metal flush door, the core ribs are split into front and back parts, and these core ribs are fixed to the inner surface of each face plate so that their opposing surfaces abut against each other to form an abutting surface between the core ribs, and one of the face plate Both left and right edges of the face plate are bent into a substantially U-shape to form a door prospect surface and an abutment surface that abuts against the abutment surface formed by folding back the left and right edges of the other face plate, and these and an engaging pawl and an engaging hole are provided on the abutting surfaces of the face plates to fit and lock each other by shifting the face plates in the vertical direction, thereby configuring a box body with both upper and lower end edges open, The opening is characterized in that the upper and lower edges of the opening are each covered with a frame material. With this configuration, the present invention can provide a door with strong fire resistance and improve workability.

【Example】

Next, the configuration of the present invention will be explained based on an embodiment shown in the drawings. In the drawings, reference numerals 1 and 2 are front and back plates of a metal flush door, and the front plate 1 is cut into a rectangular flat metal plate of a predetermined size, with necessary notches formed on both left and right edges, and then cut out on both the left and right edges. After bending the part at right angles, form a notch 4 for the lock part, and further bend it at right angles so that this notch 4 for the lock part becomes an edge surface (corresponding to the prospective face of the present invention) 1a. In this way, the front plate 1 has the necessary notches 4 (additional notches may be made if necessary), the edge surface 1a, and the back plate 2 to be described later.
The configuration is such that an abutting surface 1b is formed. Further, various necessary members such as a hinge liner 5, a front liner 6, a lock liner 7, etc. are fixed to this surface plate 1 by appropriate fixing means such as spot welding and arc welding. During the process, the core 8, which has a hat-shaped cross section, will be fixed by spot welding. This backbone 8 has a structure in which engagement claws 8a formed by cutting and raising and engagement holes 8b formed by punching are formed alternately at a predetermined interval at the bottom of the groove that serves as the mating surface.
Furthermore, the same engagement hole 9 is formed in the abutting surface 1b of the surface plate 1 in the first notch step described above. On the other hand, regarding the surface plate 2, this is also cut into a rectangular metal plate with predetermined dimensions.
Similarly, notches and bending are performed, and the above-mentioned backbone 10 is fixed by spot welding. At the bottom of the groove, which is the mating surface of the backbone 10, there is a backbone 8 on the side of the surface plate 1.
Engagement claws 10a and engagement holes 10b are formed in a reverse relationship, and furthermore, on the abutting surfaces 2a bent on the left and right long sides of the back plate 2, there are formed on the abutting surfaces 1b of the front plate 1. The engagement claw 1 corresponding to the engagement hole 9
1 is formed. The front and back plates 1 and 2 to which the back ribs 8 and 10 are fixed in this way are prepared by applying adhesive to the outer surfaces of the groove bottoms of the back ribs 8 and 10, if necessary, and then applying adhesive to the abutting surfaces 1b of the double-sided plates 1 and 2. In this state, the back plate 2 is set at a vertically shifted position with respect to the front plate 1. Then, as shown in FIG. 5, one protruding end of the front plate 1 (located on the lower side) is pressed with a stopper 12, and the other protruding end of the back plate 2 (located on the upper side) is pressed with a pressing tool 12.
If the double-sided plates 1 and 2 are pressed until their upper and lower edges are aligned with each other with the arrows 1 and 2, the respective engaging claws 8a, 10a, 11 will fit and lock into the corresponding engaging holes 10b, 8b, 9 in a hook-like manner. As a result, the back surface plates 1 and 2 are assembled into a box shape. Then, the applied adhesive is heated to a high pitch to melt and adhere, and if necessary, the groove bottoms of the backbones 8 and 10 are arc welded (only the ends are welded). Next, frame materials 13, 13a are placed on both the upper and lower edges of the opening.
are interposed and fixed integrally by spot welding.Finally, screw holes for the hinges and front part are machined, and various necessary parts such as hinges are attached to form a metal flush door. It's summery. In an embodiment of the invention constructed as described, aggregates 8, 10 fixed to face plates 1, 2, respectively
However, both aggregates 8, 10 are not fixed only by adhesive as in the conventional case, but by using engaging claws 8a, 10a and engaging hole 8.
b, 10b and are integrally butted and fixed by hook-like fitting and locking, and therefore,
There is no possibility that the aggregates 8 and 10 will peel off due to heat generation due to fire, etc., and the fire prevention performance can be extremely improved. In this way, the metal flush door of the present invention
The backbones 8 and 10 are connected to each other by hook-like fitting and locking between the engaging claws 8a and 10a and the engaging holes 10b and 8b, and the abutting surfaces 1b and 2a of the front and back plates 1 and 2 are connected to the engaging claw 11. The hook-like fitting and locking provided by the engaging hole 9 enables the fixation to be prevented from peeling off, but the engaging claws 8a, 10a,
11 and the engagement holes 10b, 8b, 9 are fitted and locked together as follows:
This is not done by pushing in the direction perpendicular to the face plate as in the conventional method, but by pushing in the direction along the face plate. A stopper 12 and a pressing tool 12 of a size corresponding to the upper and lower edge portions
This means that a small press consisting of a and the like is sufficient, and the equipment does not require a large press tool of a size corresponding to the surface area of the face plate as in the past. Furthermore, by assembling in this way, the backbones 8 and 10 and the face plates 1 and 2 are simultaneously and firmly fixed together in a fire-resistant mating and locking state, which improves workability. This will result in a significant improvement in performance. Moreover, in this case, the left and right edges of the surface plate 1 are bent into a substantially U-shape to form an edge surface 1a and an abutting surface 1b, so that the door-looking surface has already been formed. As a result, by fitting and locking the front and back plates 1 and 2, assembling the box into a box with openings at both the top and bottom edges, and closing the top and bottom openings with frame material, it can be easily turned into a door, unlike conventional ones. This eliminates the need to retrofit additional parts such as facing plates into the facing face of the door, greatly simplifying the assembly process, and reducing the number of parts, which greatly contributes to rationalization. . In this embodiment, not only the backbones 8 and 10 are fixed together, but also the double-sided plates 1 and 2 are fixed in the same manner, so that the workability can be further improved. In addition, the door manufacturing process itself has become extremely efficient and orderly, so in this respect as well,
This means that doors can be manufactured in large quantities at low cost and with stable high quality.

[effect]

In summary, since the present invention is constructed as described above, a metal flush door is constructed by vertically shifting a pair of front and back face plates to which split-type cores are fixed, respectively, and then aligning the two plates with each other. By fitting and locking the engaging claws and the engaging holes formed on the backbones, the box body is integrally assembled with openings at both upper and lower ends, and the openings are closed. It is only necessary to close it with a frame material, and the backbone and the face plate are simultaneously and firmly fixed in a fitted and locked state that is highly resistant to fire and the like. Moreover, since the left and right edges of one face plate are bent into a substantially U-shape, and the door opening surface has already been formed, when assembling a metal flush door, the facing plate material can be retrofitted to the door opening surface. Since this is no longer necessary, the assembly process is greatly simplified, the number of parts can be reduced, and rationalization can be achieved to a great extent.

[Brief explanation of the drawing]

The drawings show an embodiment of the metal flush door according to the present invention, in which Fig. 1 is a front view of the door, Fig. 2 is a cross-sectional view of the door, and Fig. 3 is a longitudinal sectional view of the door. , FIGS. 4A and 4B are action explanatory diagrams showing the engaged state, FIG. 5 is a flowchart showing the door assembly process, and FIGS. 6A and B are a plan view and a sectional view of the backbone, respectively. be. In the figure, 1 and 2 are face plates, 4 is a notch, 5, 6, and 7 are liners, 8 and 10 are ribs, 8a and 10a are engagement claws, 8b and 10b are engagement holes, 12 is a stopper, and 1
2a is a pressing tool, and 13, 13a are edge materials.

Claims (1)

[Claims] 1. In a metal flush door in which a backbone is interposed between a pair of face plates facing each other, the backbone is divided into front and back parts, and these backbones are fixed to the inner surface of each face plate so that the opposing faces abut each other. to form an abutting surface between the backbones, and the left and right edges of one face plate are bent into a substantially U-shape, and the abutment is formed by folding back the door prospective surface and the left and right edges of the other face plate. A mating surface that abuts the surface is formed, and an engaging pawl and an engaging hole are respectively formed on the abutting surfaces of the midribs and the face plates to fit and lock each other by vertically shifting the face plates. What is claimed is: 1. A metal flush door comprising a box body with open upper and lower end edges, and each of the open upper and lower end edges is closed by interposing a frame material.