JPH0256471B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a hollow steel plate door by combining a pair of front and rear face plates, and more specifically, a method for manufacturing a hollow steel plate door by combining a pair of front and rear face plates. The present invention relates to a method of manufacturing a steel plate door in which a tongue piece and a base for reinforcing a hinge part on the hanging base side are integrally formed, and the manufacturing process can be easily automated.

Conventionally, in order to manufacture a hollow steel plate door, a face plate that forms the door surface is welded to the front and rear of a separately formed four-periphery frame, and a backbone that supports the face plate is welded inside the hollow part, or In addition to filling the core, a separately formed tongue piece for attaching the lock part is attached to the lock side of the door, and a separately formed tongue piece for reinforcing the lock part is attached to the hanging side of the door to withstand the hanging load from the hinge. Since the door was manufactured by attaching a base, the manufacturing process for the door was not only complicated, but also required a large number of components made of separate materials. First, it has the disadvantage that the manufacturing process cannot be easily automated.

The present invention has been devised based on a completely new concept in view of the above-mentioned actual situation, and its purpose is to use only a pair of front and rear face plates to cover the expected surface of the door and the tongue for attaching the lock part. In addition to integrally forming a base for reinforcing the hinge part on the side and hanging side, a large number of studs are welded to the inner surface of one face plate, and a four-periphery frame part formed on the other face plate is formed on one of the face plates. After gluing or welding to the four circumferential frame parts,
By welding the other face plate and the stud to form an integrated door, the structure of the hollow steel plate door and its manufacturing process can be significantly simplified, and the structural members can be simplified. The object of the present invention is to provide a method for manufacturing steel plate doors that can unify material management, easily automate the manufacturing process, and greatly improve production efficiency.

EMBODIMENT OF THE INVENTION Hereinafter, the manufacturing method of the steel plate door based on this invention is demonstrated with respect to the Example shown in the drawing.

1 to 5 show a first embodiment. In this embodiment, 1 is a hollow steel plate door, and the steel plate door 1 has a pair of front and rear face plates 2, 3. Both are formed in a hollow shape, and within the hollow portion 4, a large number of reinforcing studs 5 are welded between the pair of front and rear face plates 2 and 3. Reference numeral 6 denotes a four-periphery frame portion, 7 a handle attached to the locking side, and 8 a hinge attached to the hanging base side.

By the way, the steel plate door 1 having the above configuration is manufactured through the following steps.

That is, in FIGS. 4 and 5, first, a door surface portion 9 is formed on one face plate 2, and a locking side prospective piece 12 and a hanging side prospective piece 13 are punched out on the left and right side edges 10, 11, Further, an upper prospective piece 15 is formed by punching on the upper edge 14 side, and then a locking part attachment hole 16a is formed in the locking side prospective piece 12, and a tongue piece 16 for attaching the locking part connected to the locking part attachment hole 16a. 16
are integrally punched and formed by making them protrude vertically and facing each other. Then, bend the locking side facing piece 12 of the face plate 2 in the facing direction along the left edge 10, fold the remaining length inward at the folding line 17, and
At 8, it is further folded back in the expected direction to form a folded part 12a. Next, the remaining end of the folded portion 12a is bent parallel to the door surface portion 9 along the folding line 19 to form an adhesive margin 2.
0, and the end piece 13 on the hanging base side also forms the right side edge 1.
1 and then folded back inward via the fold line 21 to form a folded portion 22. Further, the upper end piece 15 is bent along the upper edge 14 and then bent parallel to the door surface portion 9 via the folding line 23 to form an adhesive margin 24.

Next, the other face plate 3 is cut to a predetermined width and size to form a door face part 9', and its left and right side edges 10',
11', a locking side prospective piece 12' and a hanging base side prospective piece 13' are integrally punched and formed, and the lower edge 2
A lower prospecting piece 26 is integrally punched and formed on the locking side prospecting piece 12', and a notch 27 for attaching a locking part is punched out across the edge of the locking side prospecting piece 12'. Next, the locking side prospective piece 12' is bent in the closing direction at the left side edge 10', and the remaining end thereof is folded back along the folding line 28 to form a bent part 29, and the hanging side prospective piece 13 is folded back along the folding line 28. ' is bent along the right side edge 11' in the direction of the projection, the extra length thereof is folded back along the folding line 30, and then folded back in the direction of the projection at the folding line 31 to form the folded part 13'a, Bend the remaining end parallel to the door surface part 9' at the fold line 32, and
form 3. Next, the lower end piece 26 is folded inward, the extra length thereof is bent along the folding line 34 in a direction perpendicular to the door surface part 9', and the remaining end is folded through the folding line 35 to the door surface part 9'. , to form an adhesive margin 36.

After that, a large number of studs 5 are planted and arranged on the inner surface of the door surface part 9 of one face plate 2 at appropriate intervals in the longitudinal direction, and welded by the stud welding method,
A four-periphery frame component formed by the locking side facing piece 12, the hanging side facing piece 13, and the upper facing piece 15 of one face plate 2, and the locking side facing piece 12' and the hanging side facing piece 13' of the other face plate 2. When butt-fitting the four-periphery frame component formed by the lower prospective piece 26, the bonding margins 33 and 36 of the other face plate 3 and the one face plate 2
An adhesive 37 is applied to each of the adhesive margins 20 and 24, and the four-periphery frame components are adhered to form the four-periphery frame portion 6 of the door 1. In this case, it goes without saying that welding may be used instead of the adhesive means. After adhering or welding the other face plate 3 to the four-periphery frame part 6 in this way, if this other face plate 3 and a large number of studs 5 are spot welded from the outside, the hollow steel plate door 1 is constructed. After that, all you have to do is weld the corners and sand them.

In addition, when welding the pair of front and rear face plates 2, 3 and the stud 5, the protrusion 5 is placed in the axial direction of the stud 5.
If a is formed, stud welding and spot welding can be easily performed.

Next, a second example will be described.

In FIGS. 6 to 9, a locking side facing piece 12 and a hanging side facing piece 13'' are integrally punched and formed on the left and right side edges 10, 11 of the door face portion 9 which is divided and formed on one face plate 2, respectively. , the lock side facing piece 12 of the face plate 2 is bent in the facing direction along the left side edge 10, and the extra length thereof is folded inward at the folding line 38, and further folded in the facing direction at the folding line 39 to form a folded part. 12a. Next, the folded portion 1 is formed.
An adhesive margin 41 is formed by bending the remaining end portion of 2a parallel to the door surface portion 9 along a folding line 40. Further, the hanging end side piece 13 is similarly bent along the right side edge 11 and forms a folded part 13''a via the folding lines 42 and 43, and is parallel to the door surface part 9 at the folding line 44. It is bent to form an adhesive margin 45.

Next, left and right side edges 10', 11' and upper and lower side edges 14,
25, a lock side prospective piece 12', a suspension side prospective piece 13, an upper prospective piece 15, and a lower prospective piece 2, respectively.
6 are integrally punched and formed, and each of the above prospective pieces 1
2', 13 and 15 are respectively bent in the expected direction, and the respective extra lengths are bent along the folding lines 46, 48, 50.
The lower prospective piece 26 is folded inward at the folding line 52 to form bent parts 47, 49, and 51, and the remaining length thereof is bent in a direction perpendicular to the door face part 9'. The remaining end portion is bent parallel to the door surface portion 9' along the folding line 53 to form an adhesive margin 55.

After that, the adhesive allowances 41, 45 of the face plates 2, 3,
Apply adhesive 37 to 55, butt-fit one face plate 2 and the other face plate 2, and connect each of the facing pieces 12, 13'' of the face plates 2, 3 with 12', 13, 15, and 26. This will form the four circumferential frame portions 6 of the door 1.

Therefore, in the second embodiment, although the combination of punching and forming of each prospective piece of one and the other face plates 2 and 3 is different from the first embodiment, all other steps are performed in the same manner. This is due to

In addition, 16, 16 is a tongue piece for locking part attachment which is connected to the locking part attachment hole 16a and is formed to protrude upward and downward;
is a locking part attachment notch formed by punching across the end of the locking side prospective piece 12'.

In short, since the present invention consists of the steps described above, the steel plate door manufactured is
The four circumferential frame parts are integrally bent and bonded or welded together by the front and rear pair of face plates, so the lock side facing piece and hanging side facing piece of each face plate form a triple-layered structure when the face plates overlap. Moreover, since the pair of front and rear face plates are reinforced with a large number of studs, the overall strength of the door is dramatically increased, making it extremely rigid even though it is a hollow steel plate door. For this reason, not only is there no risk of the door twisting or becoming deformed even if it is exposed to wind pressure when opening or closing, but the hollow part is sealed, so it exhibits an excellent heat insulation effect. Can be done. Therefore, unlike conventional doors, there is no need to separately form the four-periphery frame using separate members, or to separately install a base for reinforcing the hinge portion on the hanging side of the door. Since the tongue piece for attaching the lock part, which was previously attached, is also integrally formed with one of the face plates, the structure of the door and the manufacturing process can be greatly simplified.

In addition, many studs that are welded for reinforcement are machined shaft-shaped parts, so even if the size of the door is different, if the thickness (estimated) of the hollow part is constant, the same standard products are used. It is also possible to simplify material management by unifying the component parts. Therefore, according to this manufacturing method, the manufacturing process of steel plate doors can be easily automated and the production efficiency can be significantly improved, which is an extremely useful practical effect.

[Brief explanation of drawings]

The drawings show an example of a steel plate door manufactured by the method of manufacturing a steel plate door according to the present invention, in which Fig. 1 is a front view and Fig. 2 is taken along line A-A in Fig. 1. 3 is a sectional view taken along line B-B of the same as above, FIG. 4 is a developed view of one face plate, FIG. 5 is a developed view of the other face plate, and FIG. 6 is a first view showing the second embodiment. 7 is a sectional view taken along line BB of the same, FIG. 8 is a developed view of one face plate, and FIG. 9 is a developed view of the other face plate. In the figure, 1... Hollow steel plate door, 2... One face plate, 3... Other face plate, 4... Hollow part, 5...
Stud, 5a...Protrusion of stud, 6...Four circumferential frame portion, 7...Handle, 8...Hinge, 9, 9'...Door surface portion, 10, 10'...Left side edge, 11, 11'...
Right side edge, 12... Locking side prospective piece of one face plate, 1
2'... Locking side prospective piece of the other face plate, 12a...
Folded part, 13... end piece on the hanging side of one face plate,
13'...An end piece on the hanging base side of the other face plate, 13a...
...Folded part, 13''...Prospective piece on the hanging side of one face plate, 13... Prospective piece on the hanging side of the other face plate, 1
3'a, 13''a... folded part, 14... upper edge,
15... Upper prospect piece, 16... Locking part mounting tongue piece, 16a... Locking part mounting hole, 17, 18, 19
...Folding line, 20...Adhesive allowance, 21...Folding line,
22...Bending portion, 23...Folding line, 24...Gluing allowance, 25...Lower edge, 26...Lower prospective piece, 26
a...Bending part, 27...Notch part for locking part installation, 2
8...Folding line, 29...Bending part, 30, 31, 3
2... Folding line, 33... Adhesive allowance, 34, 35...
Folding line, 36... Adhesive allowance, 37... Adhesive, 3
9, 39, 40... Folding line, 41... Adhesive allowance, 4
2, 43, 44... Folding line, 45... Adhesive allowance, 4
6... Folding line, 47... Folding part, 48... Folding line, 49... Folding part, 50... Folding line, 51...
Adhesive allowance, 52, 53...folding line, 54...bending portion, 55...adhesive allowance.

Claims (1)

[Claims] 1. When manufacturing a hollow steel door by combining a pair of front and rear face plates, first, one face plate is provided with a door face part, an upper part, a hanging side part, and a locking side part. Then, the locking side prospective piece is integrally punched out with a locking part mounting hole and a locking part mounting tongue piece that is connected to the locking part mounting hole and protrudes vertically and faces each other. The door surface portion, the lower end piece, the hanging side end piece, and the locking side end piece are integrally punched and formed on the other face plate, and the locking end end piece is provided with a stamp on its edge. The step of punching out the face plate to form a notch for attaching the locking part across it, and bending the lock side facing piece of one face plate in the facing direction, folding the extra length inward, and folding it back in the facing direction. Bend the remaining end parallel to the door surface, bend the suspension side facing piece in the direction of the opening, fold the remaining end inward, and then fold the upper facing piece inward in a direction perpendicular to the door face. A process of bending the remaining end parallel to the door face part, and bending the locking side facing piece of the other face plate in the facing direction, folding the remaining end inward, and folding the hanging side facing piece. Fold it in the facing direction, fold the extra length inward, fold it back in the facing direction and bend the remaining end parallel to the door surface, fold the lower facing piece inward, and fold the extra length inward. A process of bending the studs in the direction of the projection and bending the remaining end parallel to the door surface, and after planting and welding a large number of studs on the inner surface of the door surface of one face plate, the locking part of the other face plate is folded. It consists of the step of butting the side expected piece and the suspension side expected piece against the locking part side expected piece and the hanging side expected piece of one face plate, respectively, and welding the inner surface of the door surface part of the other face plate and the above-mentioned stud. A method of manufacturing a steel plate door characterized by the following. 2. When manufacturing a hollow steel plate door by combining a pair of front and rear face plates, first, one face plate is integrally stamped with a door face portion, a hanging end piece, and a locking side expected piece, and then A locking part mounting hole and a locking part mounting tongue protruding vertically and facing each other are integrally punched and formed on the locking side prospective piece, and a door face part and a door face part are formed on the other face plate. , the upper expected piece, the lower expected piece, the hanger side expected piece, and the locking side expected piece are integrally punched and formed, and the aforementioned locking side expected piece has a part extending over its edge for attaching the locking part. The process of punching out the face plate to form the notch, and bending the locking side facing piece and the hanging side facing piece of one face plate in the facing direction, folding the extra length inward, and bending the locking side facing piece and the hanging side facing piece of one face plate in the facing direction, and folding the extra length inward, A process of folding back and bending the remaining end parallel to the door face part, and bending the locking side facing piece and the hanging side facing piece of the other face plate in the facing direction, respectively, and folding the remaining end inward. At the same time as folding it back, bend the upper facing piece inward in a direction perpendicular to the door surface.
The step of bending the remaining end parallel to the door surface, further folding the lower prospective piece inward, bending the extra length in the direction of the projection, and bending the remaining end parallel to the door surface. After planting and welding a large number of studs on the inner surface of the door surface of one face plate, the locking part side facing piece and the hanging side facing piece of the other face plate are connected to the locking part side facing piece of one face plate and the hanging side facing piece, respectively. A method for manufacturing a steel plate door, comprising the step of welding the inner surface of the door surface of the other face plate and the stud against the original facing piece.