JPS6349504Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a flash door.

In conventional flush doors, a reinforcing edge frame is sandwiched between a pair of front and back door panels, and the top, bottom, left, and right edges of the door panel are joined to the reinforcing edge frame.

However, this configuration has the disadvantage that welding impressions are formed on the door surface, which impairs the appearance. Further, in addition to the front and back door panels, a reinforcing edge frame must be formed, which complicates the manufacturing process and takes time to assemble.

In place of the flush door with the above configuration, as shown in FIG.
Section L on the inward facing side of door panels A and A', respectively.
By integrally forming the letter-shaped bent plate parts B and B', overlapping the side plate pieces a and a' of these bent plate parts B and B', and joining them by plug welding C or rivets at the overlapping part, the front and back sides can be connected. A door panel has also been developed in which the door panels A and A' are integrated and the bent overlapping portions b and b' of the side edges of the front and back door panels A and A' are used as strength members to omit the reinforcing edge frame.

However, in the case of this conventional example, the bent plate portions B,
Since the side panels a and a' of B' are configured to overlap, extra plate material is required, and in the case of joining by welding, the entire door will be thermally deformed and distortion will occur on the panel surface. It has the following drawback.

The purpose of this invention is to solve the above-mentioned problems in the conventional example, and to provide a door panel that is easy to manufacture and has an excellent appearance without exposing bonding parts such as welding impressions on the surface.

An embodiment of this invention will be described based on FIGS. 2 to 6. This flush door has a structure in which each side edge of a pair of front and back door panels 1, 1 is bent toward the inward surface of the door panels 1, 1. A bent plate part 1a whose bent base end is curved, a side plate part 1b whose tip end is folded back at a right angle toward the inward surface of the mating door panel, and a side plate part 1b whose tip end is bent to the door panel. The butt plate parts 1c, 1c of each door panel 1, 1 facing each other are formed by forming a flat part and a butt plate part 1c bent outward in parallel with each other.
By welding them together, the front and back door panels 1,
1 in a superposed state, and end plate parts 1d, 1d, 1d', which are bent horizontally toward the mating door panel, are attached to the upper and lower edges of the front and back door panels 1, 1, respectively.
1d', the mutually opposing end plate parts 1d, 1d' of each door panel 1, 1 are overlapped and connected by riveting or welding, and the bent plate parts 1a, 1a, the side plate A side decorative cover 3 having a U-shaped cross section is inserted into the side groove 2 formed by being surrounded by the upper and lower end plate parts 1d, 1d', 1d, 1d', and the side pieces 3a, 3a thereof. is each bending plate part 1
It is press-fitted so as to be in pressure contact with a and la.

On one of the front and back door panels 1, 1, as shown in FIG. 2, a plurality of rows of reinforcing bones 4... having a thickness approximately equal to the thickness of the door to be manufactured are vertically arranged, and these reinforcing bones 4...
The reinforcing bones 4 are fitted with the fitting members 5 protruding from the inward surface of the mating door panel 1 facing the mating door panel 1, and the reinforcing bones 4 acting as spacers make the entire surface of the flash door flat. I try to keep it that way.

The reinforcing bones 4... and the fitting members 5... both have a U-shaped cross section, and have respective side pieces 4a, 4a, 5.
The intermediate surface portions are welded and attached to the inward facing surfaces of each door panel 1, 1 so that a and 5a protrude. Since welding is performed from the inward facing side, no welding impressions are formed on the surfaces of the door panels 1,1. Both side pieces 4a, 4 of reinforcement bone 4
Engagement protrusions 6, 6 are vertically provided on a, and engagement grooves 7, 7 vertically provided on both side pieces 5a, 5a of the fitting member 5 are elastically engaged with the engagement protrusions 6, 6. Thereby, the reinforcing bone 4 and the fitting member 5 are fitted together. Since the engaging protrusions 6, 6 of the reinforcing bone 4 act as ribs,
It also contributes to improving the strength of the reinforced bone 4.

Regarding the end plate parts 1d, 1d, 1d', 1d',
A concave stepped portion 8 is formed in a predetermined tip region of the end plate portion 1d of one door panel 1 inward by the thickness of the door panel, and the end plate portion 1 of the other door panel 1 is
By overlapping d' with this concave step part 8, the mating door panel 1 is sandwiched between the upper and lower end face plate parts 1d' and 1d' of one door panel 1, so that the upper and lower end faces of the door are finished flush.

Regarding the bent plate parts 1a, 1a, the curved shape of the bent base end thereof is an arc of a circle that contacts the door panel surface from the inside, in other words, the curved part of the bent base end does not protrude outside the door panel surface. At the same time, the tip of the bent plate portion 1a is made to asymptotically approach the inward facing surface of the door panels 1, 1, and the side groove 2
The general cross-sectional shape of is made to be dovetail-shaped. A hairpin-shaped section formed by the bent base end of the bent plate portion 1a functions as a strength member,
The side edges of the resulting flush door are reinforced.

In addition, in order to further strengthen the fitting of the side decorative cover 3 into the side groove 2, for example, as shown in FIG.
Both side pieces 3 are formed by expanding the tip side and are press-fitted.
a, 3a may be made to fit sufficiently tightly at the widened inner part of the side groove 2.

Furthermore, in order to increase the fitting strength of the side decorative cover 3, as shown in FIG. The abutting plate portions 1c, 1c may be sandwiched between them. In this case, butt plate part 1
If an engaging projection is formed at the tip of c and the engaging recess formed in the elastic fitting piece 3b is fitted into the engaging projection, the fitting strength can be further improved.

The overlapping portions of the end plate portions 1d and 1d' are joined by rivets or welding, but the upper and lower end surfaces are not visible when in use, so that the appearance does not deteriorate.

According to the flush door of this invention, the bent plate portions 1 are provided at each side edge of the front and back door panels 1, 1, and are bent toward the inward surface of the door panel 1, and have a curved base end.
a. Attach the tip of this bent plate portion 1a to the mating door panel 1
A side plate part 1b is folded back toward the inward surface of the door panel, and a butt plate part 1c is formed by bending the tip of this side plate part 1b outward parallel to the flat surface of the door panel, so that the butt plate parts face each other. 1c, 1c are joined to each other, and end plate parts 1d, 1d, 1d', 1d' which are bent horizontally toward the mating door panel 1 are formed on the upper and lower edges of the front and back door panels 1, 1, so that they can be connected to each other. The opposing end plate parts 1d and 1d' are overlapped, and the bent plate parts 1a and 1a and the side plate part 1
b, 1b, upper and lower end face plate parts 1d, 1d, 1d', 1
A side decorative cover 3 having a U-shaped cross section is inserted into the side groove 2 surrounded by
Since the bent plate portions 1a, 1a are fitted so as to be in pressure contact with each other, the following effects can be obtained.

(b) Front and back door panels 1 and 1 are joined by side butt plate 1
Since they are joined at c and 1c, welding indentations and other joint processing parts are not exposed on the front and back surfaces, and
The joining part is hidden by the side decorative cover 3 that fits into the side groove 2 surrounded by the bent plate parts 1a, 1a, the side plate parts 1b, 1b, and the upper and lower end face plate parts 1d, 1d, 1d', 1d'. There are no joining marks on the sides either, making it possible to create a flush door with an elegant appearance.

(b) Also, since the front and back door panels 1, 1 are joined by the butt plate parts 1c, 1c, there is no need for extra plate material as in the conventional example shown in Fig. 1, and the minimum amount of plate material is required. In addition, even though the reinforcing edge frame around the door is omitted, the thickness of the door around the door can be set accurately. Furthermore, even when welding is used as the joining means, the tips of the butt plate parts 1c and 1c can be selected as the joining point, so there is less heat influence on the entire door as seen in the conventional example shown in Fig. 1, and the front and back panels It is possible to prevent distortion from occurring in parts 1 and 1, making it easier to automate welding work.

(c) Since the proximal curved portion of the bent plate portion 1a functions as a strength member instead of the reinforcing frame in the conventional example, sufficient strength can be provided even though the reinforcing frame is omitted.

(d) The joining process such as welding is only performed between the front and back door panels 1 and 1, and the joining process on the side can be hidden by simply fitting the side decorative cover 3 into the side groove 2, so the assembly work is easy. can be greatly simplified.

(E) In particular, since the side decorative cover 3 is installed by fitting into the side groove 2, the upper and lower ends are connected to the end plate portions 1d, 1.
d', 1d, and 1d' to provide sufficient mounting strength. When joining the door panels 1, 1 by welding or the like, for example, by processing the upper and lower end plate parts 1d, 1d', 1d, 1d' from the front side, it is possible to avoid contacting the joined part with the eye. It is possible.

[Brief explanation of drawings]

Fig. 1 is a horizontal sectional view of the main part showing a conventional example, Fig. 2 is a front view showing an embodiment of this invention, Fig. 3 is a horizontal sectional view of the main part, Fig. 4 is a longitudinal sectional view, and Fig. 5 is an enlarged horizontal sectional view of the main part, Figure 6 is a partially broken exploded perspective view,
FIG. 7 is an enlarged exploded sectional view of main parts of another embodiment. 1... Door panel, 1a... Bent plate portion, 1b...
...Side plate part, 1c...Butt plate part, 1d, 1d'...
...End plate part, 2...Side groove, 3...Side side decorative cover, 3a...Side piece part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A bent plate portion, which is bent toward the inward side of the door panel and whose bent base end is curved, on each side edge of the front and back door panels; A side plate portion is folded back toward the inward surface side, and a butting plate portion is formed by bending the tip of this side plate portion outward in parallel with the flat surface portion of the door panel, and the mutually opposing abutting plate portions are joined together. At the same time, end plate parts bent horizontally toward the mating door panel are formed on the upper and lower edges of the front and back door panels, and the mutually opposing end plate parts are overlapped, and the bent plate part and the side plate A side surface decorative cover having a U-shaped cross section is fitted into a side groove formed by being surrounded by the upper and lower end plate portions so that both sides of the cover are in pressure contact with each bent plate portion. flat door. (2) One of the front and back door panels has reinforcing ribs on its inward facing surface, and the other of the front and back door panels has a fitting member on its inward facing surface that elastically fits into the reinforcing bones.Claim 1 of Utility Model Registration Flush door as described in section.