JPH06134574A - Manufacture of fire door - Google Patents

Abstract

PURPOSE:To provide the manufacturing method of the fire door capable of facilitating welding work of a plate member, further, reducing the number of work processes, the remarkably improving workability and economics and manufacturing the fire door excellent in the quality. CONSTITUTION:The plate member 2 where right and left back plate parts 7a and 8a joined to right and left side plate parts 5a and 6a and bent inward are formed is provided. A frame member 3a where fitting groove parts 14a and 15a capable of fitting the right and left back plate parts 7a and 8a of the plate member 2 to both ends are formed is provided. The right and left back plate parts 7a and 8a of a couple of plate members 2a and 2b abut on each other and frame members 3a and 3b are fitted to the upper ends and lower ends of the plate member 2a and 2b from above and below. The upper ends and lower ends of the plate members 2a and 2b and the peripheral ends of the frame members 3a and 3b are then subjected to spot welding and the fire door 1 is manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a fire door used to prevent the spread of fire in a fire or the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a pair of plate members 23a, 23 in which left and right side surface portions 21, 22 are formed by bending.
b, a pair of contact plate members 26a and 26b in which the side surface portion 24 and the back surface portion 25 are formed by bending are provided, and the right side surface portion 22a end surface of the plate member 23a and the left side surface portion 21b end surface of the plate member 23b are brought into contact with each other, and The front surface of the side surface portion 24b of the contact plate member 26b is brought into contact with the back surfaces of the right side surface portion 22a and the left side surface portion 21b, and the contact portions between the end surface of the right side surface portion 22a and the end surface of the left side surface portion 21b are arc-welded, and then sander finished. Finally, the fireproof door 27 was manufactured with putty finish.

[0003]

However, in the conventional method for manufacturing a fire door, since the plate members are joined by linear welding, it is not possible to use a very thin steel plate as the plate member. Therefore, there is a problem that the plate member becomes large in weight, labor is required for handling, and material cost is increased.

Further, since the plate members are welded while contacting each other at their end faces, a high skill is required for welding work,
Welders with high skills are required to manufacture good quality fire doors, but it is not easy to secure them due to the recent labor shortage.

Further, arc welding, sander finishing,
Since a multi-step work of putting putty is required, there is a problem that a long manufacturing time is required.

The present invention has been made in view of the above problems, and an object of the present invention is to facilitate welding work of a plate member, reduce the number of working steps, and improve workability and economy. It is to provide a method of manufacturing a fireproof door that can be improved significantly and can also produce a good quality fireproof door.

[0007]

In order to achieve the above object, a method of manufacturing a fire door of the present invention comprises a pair of plates which are connected to left and right side plate parts to form left and right rear plate parts which are bent inward. A pair of frame members having fitting grooves formed on both ends thereof to fit the left and right rear plate portions of the plate member, and contacting the left and right rear plate portions of the pair of plate members to each other; A frame member is fitted to the upper and lower ends of the plate member, and the plate member and the frame member are spot-welded to manufacture a fire door.

[0008]

By fitting the pair of frame members to the upper end portion and the lower end portion of the plate member, the pair of plate members can be easily joined, and the plate member and the frame member can be easily joined by spot welding.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a fire door 1 manufactured by the manufacturing method of the present invention is composed of a pair of plate members 2a and 2b and a pair of frame members 3a and 3b. It is processed and molded.

The plate member 2a is bent to the left and right ends of the front plate part 4a to connect the left and right side plate parts 5a and 6a, and further bent to the rear ends of the left and right side plate parts 5a and 6a. Back plate part 7
a and 8a are connected to each other and are formed symmetrically.

The plate member 2b has the same structure and the same size as the plate member 2a.

The frame member 3a is bent at the front and rear side ends of the upper surface plate portion 9a to connect the front and rear side surface plate portions 10a and 11a, and is bent at the left and right side ends to connect the left and right side surface plate portions 12a and 13a. There is. Here, fitting groove portions 14a and 15a recessed inward are formed over the central portions of both side end portions of the upper surface plate portion 9a and the central portions of the left and right side surface plate portions 12a and 13a. The frame member 3a is also formed symmetrically.

The frame member 3b has the same structure and the same size as the frame member 3a.

Next, a method of manufacturing the fire door of the present invention using the above member will be described.

First, as shown in FIG. 1, the plate members 2a, 2
b so that the surfaces of the front plate portions 4a, 4b are on the outside, and the left rear plate portion 7a of the plate member 2a, the right rear plate portion 8b of the plate member 2b, and the right rear plate portion of the plate member 2a are indicated by arrows. 8a and the left back plate portion 7b of the plate member 2b are brought into contact with each other.

Next, with the surface of the upper surface plate portion 9a of the frame member 3a facing upward, the front side surface plate portion 10a, the rear side surface plate portion 11a, and the left side surface plate portion 12 of the frame member 3a are indicated by arrows.
a, the surface of the right side plate portion 13a and the front plate portion 4 of the plate member 2a
a, the left side plate portion 5a, the back surface of the right side plate portion 6a, the plate member 2
The front plate portion 4b of b, the left side plate portion 5b, and the back surface of the right side plate portion 6b are brought into contact with each other to fit the frame member 3a to the upper end portions of the plate members 2a and 2b.

At this time, as shown in FIGS. 3 and 4, the right back plate portion 8a of the plate member 2a and the left back plate portion 7b of the plate member 2b.
Fits in the fitting groove 15a of the frame member 3a, and the plate member 2
The left rear plate portion 7a of a and the right rear plate portion 8b of the plate member 2b are fitted in the fitting groove portion 14a of the frame member 3a.

Similarly, the surface of the upper surface plate portion 9b of the frame member 3b is set to the upper side, and the front side surface plate portion 10b, the rear side surface plate portion 11b, and the left side surface plate portion 12 of the frame member 3b are indicated by arrows.
b, the surface of the right side plate portion 13b and the front plate portion 4 of the plate member 2a
a, the left side plate portion 5a, the back surface of the right side plate portion 6a, the plate member 2
The front plate portion 4b of b, the left side plate portion 5b, and the back surface of the right side plate portion 6b are brought into contact with each other to fit the frame member 3b to the lower end portions of the plate members 2a and 2b.

Similarly, at this time, as shown in FIGS. 3 and 5, the right rear plate portion 8a of the plate member 2a and the left rear plate portion 7b of the plate member 2b are fitted into the fitting groove portions 15b of the frame member 3b. ,or,
The left rear plate portion 7a of the plate member 2a and the right rear plate portion 8b of the plate member 2b are fitted into the fitting groove portion 14b of the frame member 3b.

In this way, the plate members 2a and 2b can be joined by the frame members 3a and 3b.

Then, by spot welding the upper ends of the plate members 2a and 2b and the peripheral end of the frame member 3a, and the lower ends of the plate members 2a and 2b and the peripheral end of the frame member 3b at appropriate points, as shown in FIG. Then, the frame members 3a and 3b are joined to the plate members 2a and 2b so that the plate members 2a and 2b are completely joined, and the fire door 1 can be manufactured.

The method for manufacturing a fire door of the present invention is not limited to the case where the above member is used.
Various forms of members can be used without departing from the scope of the present invention.

[0024]

According to the method of manufacturing a fire door of the present invention, the plate members are joined by fitting the frame members to the upper and lower end portions of the plate members while abutting the back plate portions of the plate members, Since the fire door is manufactured by spot welding the upper and lower ends of the plate member and the peripheral edge of the frame member, the work is easy, and the quality of the work is good without the need for highly skilled workers. It is possible to manufacture various fire doors,
The number of manufacturing steps is small, and the manufacturing time of fire doors can be greatly shortened.

Further, since the upper and lower ends of the plate member and the peripheral end of the frame member are spot-welded and linear welding is not performed on the left and right side surfaces of the fire door, the plate member is thinner than before. Since a steel plate can be used, the plate member has a small weight, and the labor of handling can be reduced, and the material cost can be reduced.

Further, no welding marks are left on the left and right side portions of the fire door, the appearance is preferable, and the sand finishing work, which is not so good for the health of the worker, is not performed, and the health of the worker is also preferable. . Further, since arc welding is not performed, it is not necessary to scrape off the galvanized layer of the steel sheet, and the rustproof effect of the side surface portion is also improved.

[Brief description of drawings]

FIG. 1 is an explanatory view of a method for manufacturing a fire door of the present invention.

FIG. 2 is an external perspective view of a fire door manufactured according to the present invention.

FIG. 3 is a cross-sectional view of the right end of a fire door manufactured according to the present invention.

FIG. 4 is a vertical sectional view of an upper end portion of a fire door manufactured according to the present invention.

FIG. 5 is a vertical sectional view of a lower end portion of a fire door manufactured according to the present invention.

FIG. 6 is a cross-sectional view of a right end portion of a conventional fire door.

[Explanation of symbols]

 1 Fire Door 2 Plate Member 3 Frame Member 5 Left Side Plate 6 Right Side Plate 7 Left Back Plate 8 Right Back Plate 14 Fitting Groove 15 Fitting Groove

Claims (1)

[Claims] 1. A pair of plate members, which are connected to the left and right side plate parts to form left and right rear plate parts that are bent inward, and fitting groove parts into which the left and right rear plate parts of the plate member can be fitted at both ends. And a pair of frame members having the above-mentioned structure, the left and right rear plate portions of the pair of plate members are brought into contact with each other, and the pair of frame members are fitted to the upper end portion and the lower end portion of the plate member. A method for manufacturing a fire door by spot welding of and to manufacture a fire door.