JP6166566B2 - Steel door and method for manufacturing steel door - Google Patents

Description

The present invention relates to a steel door and a method for manufacturing a steel door.

The steel door is formed by fixing the first surface material and the second surface material to the door frame. When fixing the first surface material and the second surface material to the door frame, it is necessary to adjust the positions of the surface materials fixed to the door frame. Usually, the door frame has a plurality of central bones that extend in the height direction of the door body. A method using a heat-meltable adhesive is used to fix the central bone and the surface material. There is a technique of adhering with a tape (Patent Document 1).

In the former case, the steel door is manufactured by a so-called hot press method. With the first surface material and the second surface material provided so as to sandwich the door frame, the adhesive is melted by the heat of the hot press to exhibit fluidity and adjust the position of the first surface material and the second surface material. Is possible.

In the latter case, the steel door is manufactured by a so-called welding method. First, the door frame is positioned and fixed on the first surface material, the second surface material is placed on the first surface material to which the door frame is fixed, and the second surface material is positioned. Temporarily welding the second surface material partially to the first surface material (one side of the door butt side or the door tip side) so that the material can rotate relative to the first surface material. Fix it. In some cases, a part of the door frame is previously welded to the second surface material. The temporarily fixed second surface material is rotated with respect to the first surface material, the door frame is exposed, the protective film of the double-sided tape of the middle bone is peeled off, and the second surface material is covered again on the door frame. The second surface material and the door frame are bonded to each other, and the first surface material and the second surface material are welded at the door tip side, door bottom side, and upper part.

Here, in the steel door for sliding doors, folded-back hook pieces are formed on the lower end of the surface portion of the first surface material and the lower end of the surface portion of the second surface material, and the lower frame of the door frame Is formed in a downward U-shape, and the lower end of the lower frame is opposed to the retaining piece to prevent the first surface material and the second surface material from opening due to thermal deformation (Patent Document 2). FIG. 5). If such a steel door for sliding doors is to be manufactured by the above-described welding method, the latching piece at the lower end of the surface material will be caught by the lower end of the lower frame, so the welding method cannot be employed.
Patent No. 3,845,821 JP 2012-92650 A

An object of this invention is to provide the steel door provided with the structure which can be manufactured using what is called a welding method.

The first technical means adopted by the present invention is:
In the end structure of the steel door provided with the door frame and the first surface material and the second surface material fixed to the door frame,
The end is at least one of a door upper part, a door lower part, a door tip side part, a door bottom side part,
The end portion includes one end frame constituting the door frame, and the end frame is a long element extending in a door width direction or a door height direction according to the end portion, A surface part extending in the thickness direction and a first piece and a second piece perpendicular to the surface part are formed in an inwardly square shape, and the first piece and the second piece are respectively the first surface material. Is fixed to the surface portion of the second surface material,
The surface portion of the first surface material and the surface portion of the second surface material include a peripheral portion extending toward the door end portion beyond the surface portion of the end frame, and a space is formed between the peripheral portions. And
A hook piece that is folded back to the space side is formed at the tip of each peripheral portion,
In the space, a surface portion extending in the door thickness direction, and a surface material formed in an outward U shape from the first piece and the second piece perpendicular to the surface portion and extending in the length direction of the end frame An opening prevention member is provided, and the surface portion of the surface material opening prevention member is fixed to the surface portion of the end frame, and the first piece and the second piece are close to or in contact with the inner surface of each peripheral portion, The front end side of the first piece and the second piece is opposed to the latching piece,
It is the steel door provided with the said edge part structure.
In the embodiment to be described later, the end structure is employed only in the lower part of the door, but the end structure is employed in any two of the door upper part, the door lower part, the door tip side part, and the door bottom side part. Also good.

In one aspect, the steel door is a sliding door.
The end structure is a door lower structure,
The end frame is a lower frame formed in an upward U-shape from the lower surface portion and the rising first piece and the second piece,
The peripheral portion is a lower end portion extending downward beyond the lower surface portion of the lower frame, and the latching piece is formed at the lower end of the lower end portion,
The surface material opening prevention member is formed in a downward U shape from the upper surface portion, the first hanging piece, and the second hanging piece, and the upper surface portion of the surface material opening prevention member is fixed to the lower surface portion of the lower frame. The first hanging piece and the second hanging piece are close to or in contact with the inner surface of each lower end portion, and the lower ends of the first hanging piece and the second hanging piece are opposed to the retaining piece.
In one mode, the 1st surface material and the 2nd surface material are located in the door tip side and door bottom side of a door body, and the door tip side contact part and door bottom side contact part which extend in the height direction are included. With
In the temporarily fixed state in which either the door tip side contact portion or the door bottom side contact portion is temporarily welded, the first surface material and the second surface material rotate around the welding site as a rotation fulcrum. Is possible,
In a state where both the door tip side contact portion and the door bottom side contact portion are welded, the surface material opening prevention member is inserted into the space from the length direction of the lower frame, It is fixed to the side frame.
In this specification, “temporary welding” means welding in which two welded elements allow rotation at the welding site, and in a specific embodiment, the contact portions of the two elements are welded. This means that several places (for example, three points) in the length direction of the contact portion are welded.

The second technical means adopted by the present invention is a method of manufacturing a steel door using a door frame, a first surface material and a second surface material, and a surface material opening prevention member,
At least one end portion of the surface portion of the first surface material and an end portion of the surface portion of the second surface material facing the at least one end portion of the first surface material are each formed with a folded-back hook piece. Has been
The first surface material and the second surface material include a plurality of abutting portions except for an end portion where the hooking piece is formed, and the abutting portions are in a door width direction or a door height direction. Extended,
The door frame includes an end frame extending in a door width direction or a door height direction according to the end portion at the end portion where the hooking piece is formed, and the end frame includes a surface portion extending in the door thickness direction. The first piece and the second piece perpendicular to the surface portion are formed in an inward U-shape,
The surface material opening prevention member is formed in an outward U-shape from a surface portion extending in the door thickness direction and a first piece and a second piece perpendicular to the surface portion, and extends in the length direction of the end frame. Extended,
Positioning and fixing the door frame to the surface portion of the first surface material;
Positioning the first surface material and the door frame fixed to the surface portion of the first surface material by covering the second surface material and temporarily welding any one of the plurality of contact portions When,
The second surface material is rotated with respect to the first surface material using the temporary welded portion as a rotation fulcrum, and an adhesive means is applied to at least a part of the door frame fixed to the surface portion of the first surface material. Steps,
Fixing the surface portion of the second surface material to a door frame fixed to the surface portion of the first surface material using at least a part of the bonding means;
Welding the plurality of contact portions;
The surface material opening prevention member is placed in a space formed between peripheral surface portions of the surface portion of the first surface material and the surface portion of the second surface material that extend toward the end portion beyond the surface portion of the end frame. The first piece and the second piece of the surface material opening prevention member are inserted close to or in contact with the inner surface of each peripheral portion so that the front end faces the hooking piece. Fixing the surface portion of the material opening prevention member to the surface portion of the end frame;
It has.
In one aspect, in the step of positioning and fixing the door frame to the surface portion of the first surface material, the entire door frame is fixed to the surface portion of the first surface material.
In one aspect, a part of the door frame (excluding the end frame) may be fixed in advance to the surface portion of the second surface material. In this case, the door frame is positioned and fixed to the surface portion of the first surface material. In the step, the remaining portion of the door frame is fixed to the surface portion of the first surface material.

In the present invention, the surface material opening prevention member is constituted by a separate member from the door frame (end frame) that forms the framework of the steel door, so that the surface material opening prevention member is independent of the steel door welding method. In the case of manufacturing a steel door by a so-called welding method, there is no possibility that the hook piece at the tip of the surface material is caught on the end of the end frame.
Since the surface material opening prevention member is provided by fixing the surface portion to the surface portion of the end frame (the first piece and the second piece of the surface material opening prevention member are close to or in contact with the inner surface of each peripheral portion. The fixing means of the surface material opening prevention member is not visible from the surface of the door body, and the appearance is good.

It is the whole sliding door device front view. It is a longitudinal cross-sectional view of a sliding door apparatus. It is a cross-sectional view of a sliding door device. It is a front view of a door body. It is a partial omission cross section, a top view, a front view, and a bottom view of a door body in order from the top. It is the side view which looked at the front view of FIG. 5 from the door bottom side. It is a longitudinal cross-sectional view of the lower part of a door body. It is the side view which looked at the lower part of the door body before the surface material opening prevention member wearing from the door bottom side. It is the side view seen from the door bottom side of the lower part of the door body after surface material opening prevention member wearing.

Embodiments of the present invention will be described in detail with reference to the drawings. 1 is an overall front view of the sliding door device, FIG. 2 is a longitudinal sectional view of the sliding door device, and FIG. 3 is a transverse sectional view of the sliding door device. The sliding door device is suspended in the door body 1 and the upper frame 11. Rails 12, and a suspension roller 13 provided on the upper surface of the door body 1 is guided and moved by the suspension rail 12, so that the door body 1 has an upper frame 11, a door-end side vertical frame 14, The opening part formed by the floor 15 and the door pocket part 16 is opened and closed. The floor 15 is provided with a steady roller 17 positioned on the door end side of the door pocket portion 16, and the guide rail 10 at the lower end of the door 1 slides on the steady roller 17 when the door 1 is opened and closed. By coming into contact and being guided by the steadying roller 17, the deflection of the lower end portion of the door body 1 is regulated. In addition, when the sliding door device is provided with a lower frame, a steadying roller may be provided on the lower frame.

As shown in FIG. 4, the door body 1 of the sliding door device is arranged in parallel with an interval in the width direction of the upper frame 2, the lower frame 3, the door end side vertical frame 4, and the door body 1. A plurality of intermediate vertical frames 5, an intermediate horizontal frame 6 connecting the intermediate vertical frames 5 in the horizontal direction, and window frames W <b> 1 to W <b> 4 having a quadruple frame shape are provided. In the illustrated embodiment, the door body 1 includes a window portion W, and the intermediate vertical frame 5 has a height dimension of the door body 1 except for the left and right intermediate vertical frames 5 located on the door end side and the door bottom side. Compared to the short length. In a typical door body having no window portion, in a typical example, intermediate vertical frames having substantially the same length as the overall height of the door body are arranged with a gap in the width direction of the door body. In the illustrated embodiment, the vertical frame is not provided at the door butt side end portion of the door body 1, but the door body 1 may be provided at the door butt side end portion and provided with a vertical frame. In the illustrated embodiment, the lower end of the door-end side vertical frame 4 and the door-end side end of the lower frame 3 are spaced apart (see FIG. 5), but these ends may be connected to each other. In the illustrated embodiment, an intermediate frame is assembled in advance from the intermediate vertical frame 5, the intermediate horizontal frame 6, and the window frames W1 to W4.

The door body 1 includes a first surface material 7 and a second surface member that form a surface portion of the door body 1 (upper surface, door tip side expectation surface, door bottom side expectation surface, one side finding surface, and the other side finding surface). For the door frame (framework) comprising the upper surface frame 2, the lower frame 3, the door-end side vertical frame 4, the intermediate vertical frame 5, the intermediate horizontal frame 6, and the window frames W1 to W4. Thus, the door body 1 is formed by bonding the first surface material 7 and the second surface material 8 together. The door body 1 is a steel door, and the first surface material 7 and the second surface material 8 are formed by bending a thin steel plate having a predetermined shape, and each of the frames 2 to 6 and W1 to W4 has a predetermined thickness. It is formed by bending a steel material.

As shown in FIGS. 4, 5, and 6, the upper frame 2 is a long member that extends horizontally in the width direction of the door body 1, and includes an upper surface portion 20 that extends along the upper surface of the door body 1, and a door body. The first piece 21 that hangs down from the upper surface portion 20 along one of the first finding surfaces and the second piece 22 that hangs down from the upper surface portion 20 along the other finding surface are formed in a U-shaped cross-sectional view. Has been.

As shown in FIGS. 4, 5, 6, and 7, the lower frame 3 is a long member that extends horizontally in the width direction of the door 1, and finds the lower surface 30 and one of the doors 1. The first piece 31 rising vertically from the lower surface portion 30 along the surface and the second standing piece 32 rising vertically from the lower surface portion 30 along the other finding surface are formed in a U shape in cross section. ing.

As shown in FIGS. 3 and 4, the door-end side vertical frame 4 is a long member extending perpendicularly to the height direction of the door body 1, and extends along the expected surface of the door body 1 on the door-end side. The side part 40, the 1st piece 41 extended toward the door bottom side perpendicularly with respect to the side part 40 along one finding surface of the door body 1, and the side part 40 along the other finding surface The second piece 42 that extends perpendicularly to the door butt side is formed in a U-shaped cross-sectional view.

As shown in FIGS. 4 and 5, the intermediate vertical frame 5 is a long member extending perpendicularly to the height direction of the door body 1, and a side surface portion 50 extending in the expected direction (thickness direction) of the door body 1. A first piece 51 extending perpendicularly to the side surface portion 50 along one finding surface of the door body 1 and a second piece extending perpendicularly to the side surface portion 50 along the other finding surface. The piece 52 is formed in a U shape in a sectional view. In the illustrated embodiment, since the window portion W is formed in the upper half portion of the door body 1, the intermediate vertical frame 5 disposed below the window portion W is short.

As shown in FIGS. 2, 3, 5, and 6, the first surface material 7 includes a surface portion 70 that forms one finding surface of the door body 1, and the upper end side of the surface portion 70 is perpendicular to the surface portion 70. An upper folded piece 71 to be folded, a folded piece 72 in which the door end side of the surface portion 70 is folded and brought into close contact, a door bottom side folded piece 73 in which the door bottom side of the surface portion 70 is folded at a right angle, and a door bottom side folded piece. 73, a bent piece 730 that is bent at a right angle so as to face the surface portion 70, a lower bent piece 74 that is formed by bending the lower end side of the surface portion 70 at a right angle to the surface portion 70, and a lower bent piece. And a rising piece (holding piece) 75 that is bent at a right angle so as to face the surface portion 70.

The second surface material 8 includes a surface portion 80 that forms the other finding surface of the door body 1, an upper bent piece 81 that bends the upper end side of the surface portion 80 at a right angle to the surface portion 80, and a door tip of the surface portion 80. The door end side bent piece 82 formed by bending the side at a right angle with respect to the surface portion 80, the door bottom side bent piece 83 formed by bending the door bottom side of the surface portion 80 at a right angle, and the lower end side of the surface portion 80 with respect to the surface portion 80. A lower bent piece 84 that is bent at a right angle and a rising piece 85 that is bent at a right angle so that the tip side of the lower bent piece 84 faces the surface portion 80. ing.

As shown in FIG. 3 and FIG. 5, the tip of the door tip side bent piece 82 of the second surface material 8 is in contact with the folded piece 72 of the first surface material 7, and the door tip side bent piece 82 is the door body 1. The prospective surface of the door end side is formed. The door bottom side folded piece 73 of the first surface material 7 forms a door bottom side expected surface of the door body 1, but the door bottom side folded piece 73 is formed shorter than the thickness dimension of the door body 1, The door bottom side bent piece 83 of the second surface material 8 is in contact with the side surface of the bent piece 730 of the first surface material 7. As shown in FIG. 6, the upper bent piece 71 of the first surface material 7 overlaps the upper bent piece 81 of the second surface material 8 from above, and the upper bent pieces 71, 81 form the upper surface of the door body 1. doing. As shown in the top view of FIG. 5, a cutout (indicated by hatching) for attaching the suspension roller 13 is formed on the top surface of the door body 1.

In the present embodiment, the width of the upper surface portion 20 of the upper frame 2, the lower surface portion 30 of the lower frame 3, the side surface portion 40 of the door-end side vertical frame 4, and the side surface portion 50 of the intermediate vertical frame 5 (the thickness of the door body 1). The dimension in the vertical direction) is substantially the same. The surface portion 70 of the first surface material 7 is in contact with the first piece 31 of the lower frame 3 and the first piece 61 of the intermediate vertical frame 5. The surface portion 80 of the second surface material 8 includes the second piece 22 of the upper frame 2, the second piece 32 of the lower frame 3, the second piece 42 of the door-end side vertical frame 4, and the second piece 62 of the intermediate vertical frame 5. Abut.

In the present embodiment, the first piece 31 and the second piece 32 of the lower frame 3, the first piece 51 and the second piece 52 of the intermediate vertical frame 5 are provided with the double-sided adhesive tape T, and the first surface material 7. Surface portion 70, first piece 31 of lower frame 3 and first piece 51 of intermediate longitudinal frame 5, surface portion 80 of second surface material 8, second piece 32 of lower frame 3 and second portion of intermediate longitudinal frame 5. The pieces 52 are connected by an adhesive tape T. The door end side frame 4 and the upper frame 2 are fixed (welded) to the surface portion 80 of the second surface material 8.

The first surface material 7 and the second surface material 8 are positioned on the upper surface of the door body 1 and extending in the width direction when they are covered with each other, and are positioned on the door end side and the door bottom side of the door body 1. The door tip side contact portion C2 and the door bottom side contact portion C3 extending in the height direction are provided, and the upper contact portion, the door tip side contact portion, and the door bottom side contact portion form a welding site. doing. More specifically, the first surface material 7 and the second surface material 8 overlap the upper bent pieces 71, 81, and the upper contact portion C 1 between the end portion of the upper bent piece 71 and the surface portion of the upper bent piece 81. YAG laser welding, the tip of the door end side bent piece 82 is brought into contact with the folded piece 72 and the contact portion C2 is YAG laser welded, and the tip of the door bottom side bent piece 83 is bent to the bent piece 730. The contact part C3 is contacted with the side surface and YAG laser welded. In the present invention, the element welding means is not limited to YAG laser welding.

As shown in FIGS. 6 and 7, the lower end side of the surface portion 70 of the first surface material 7 and the lower end side of the surface portion 80 of the second surface material 8 extend downward beyond the lower surface portion 30 of the lower frame 3. In this specification, such a part is referred to as a “lower part”. The lower bent piece 74 and the rising piece 75 described above are formed at the lower end of the lower portion 700 of the surface portion 70 of the first surface material 7. The lower bent piece 84 and the rising piece 85 described above are formed at the lower end of the lower portion 800 of the surface portion 80 of the second surface material 8.

A surface material opening preventing member 9 is attached to the lower surface portion 30 of the lower frame 3 so as to be positioned between the lower portions 700 and 800. The surface material opening prevention member 9 is a long member extending horizontally in the width direction of the door body 1, and includes an upper surface portion 90 extending along the lower surface portion 30 of the lower frame 3, and one of the door bodies 1. A first hanging piece 91 that hangs down from the upper surface portion 90 along the finding surface and a second hanging piece 92 that hangs down from the upper surface portion 90 along the other finding surface are formed in a U-shape in cross-sectional view. Yes.

The upper surface portion 90 of the surface material opening preventing member 9 is in contact with the lower surface portion 30 of the lower frame 3, and the first hanging piece 91 is close to or in contact with the lower portion 700, and the second hanging piece 92. Is close to or in contact with the lower portion 800. As shown in FIG. 7, the lower end of the first hanging piece 91 is at a lower position than the upper end of the rising piece 75, and the lower end side of the first hanging piece 91 and the upper end side of the rising piece 75 face each other. Yes. The lower end of the second hanging piece 92 is at a lower position than the upper end of the rising piece 85, and the lower end side of the second hanging piece 92 and the upper end side of the rising piece 85 are opposed to each other. Thus, when the lower end side of the first surface material 7 or the second surface material 8 is deformed by heat or the like, the rising pieces 75 and 85 are the first hanging piece 91 and the first hanging piece of the surface material opening prevention member 9. By engaging with the lower end portion of 92, the lower end side of the first surface material 7 or the second surface material 8 is prevented from opening.

A guide rail 10 is attached to the lower end portion of the door body 1 so as to be positioned between the lower portions 700 and 800 (the first hanging piece 91 and the second hanging piece 92 of the surface material opening prevention member 9). ing. The guide rail 10 is a long member that extends horizontally in the width direction of the door body 1, and the upper surface portion 100 that extends along the lower surface portion 30 (the upper surface portion 90 of the surface material opening prevention member 9) of the lower frame 3. And a first hanging piece 101 that hangs down from the upper surface portion 100 along one finding surface of the door body 1 and a second hanging piece 102 that hangs down from the upper surface portion 100 along the other finding surface. It is formed in a U-shape. Depending on the diameter of the steadying roller 17, the surface material opening preventing member 9 may be designed to function as a guide rail.

The surface material opening prevention member 9 and the guide rail 10 are fixed to the lower surface portion 30 of the lower frame 3 with screws S at a plurality of positions in the width direction of the door body 1 on the upper surface portions 90 and 100. Since the screw S is not visible from the outside of the door body 1, the design is not impaired. Further, the first hanging piece 91 and the second hanging piece 92 of the surface material opening preventing member 9 are only close to or in contact with the inner surfaces of the lower end portions 700 and 800 in an unfixed state. Since no fixing means is provided, the appearance of the lower end portions 700 and 800 is not impaired.

As shown in FIG. 6, the lower ends of the door butt side bent piece 73 of the first surface material 7 and the door butt side bent piece 83 of the second surface material 8 are the height immediately above the lower surface portion 30 of the lower frame 3. The lower end portion 700 of the surface portion 70 of the first surface material 7 and the lower end portion 800 of the surface portion 80 of the second surface material 8 are not reached. Therefore, an opening communicating with the space between the lower portions 700 and 800 is formed below the door end side end surface of the door body 1. As will be described later, this opening is required when the surface material opening prevention member 9 and the guide rail 10 are attached. In the sliding door device of the type in which the door butt side of the door body 1 is drawn into the door pocket portion 16, it is not always necessary to conceal this opening, but in the type of sliding door device in which the door butt side of the door body 1 is exposed to the outside, It is desirable to close this opening. In the present embodiment, the lower end of the door-side bent piece 82 of the second surface material 8 extends to the lower ends of the first surface material 7 and the second surface material 8 corresponding to the lower portions 700 and 800. Further, an opening that communicates with the space between the lower portions 700 and 800 may be formed by notching a lower portion of the door-end side bent piece 82 of the second surface material 8.

A method for manufacturing the door 1 will be described. First, the first surface of the door frame (including the lower frame 3, the intermediate vertical frame 5, the intermediate horizontal frame 6, and the window frames W1 to W4) with respect to one surface material, for example, the surface portion 70 of the first surface material 7. Position and fix. More specifically, the first surface material 7 is placed horizontally, and the first piece 31 of the lower frame 3 and the first piece 51 of the intermediate vertical frame 5 are placed at predetermined positions on the surface portion 70 of the first surface material 7. To fix. Examples of fixing means include pressure-sensitive adhesive tape, adhesive application, welding, or any combination thereof. In the present embodiment, the second piece 22 of the upper frame 2 and the second piece 42 of the door-end side vertical frame 4 are fixed (welded) to the surface portion 80 of the second surface material 8 in advance. In the present embodiment, an example in which a part of the door frame is fixed to the second surface material 8 in advance is shown, but the first surface is not fixed to the second surface material 8 in advance without fixing any part of the door frame. The entire door frame may be positioned and fixed with respect to the surface portion 70 of the material 7.

Next, the first surface material 7 placed horizontally, the lower frame 3 positioned and fixed with respect to the first surface material 7, the intermediate frame (intermediate vertical frame 5, intermediate horizontal frame 6, window frames W1 to W4) And the second surface material 8 on which the upper frame 2 and the door-end side vertical frame 4 are fixed (welded) in advance are positioned, and the positioned second surface material 8 is replaced with the first surface material 7. The second surface material 8 is temporarily fixed by positioning by welding YAG laser welding the door bottom side contact portion C3 between the side surface of the bent piece 730 and the tip of the door bottom side bent piece 83 of the second surface material 8. To do. More specifically, by welding the door butt side contact portion C3 at a plurality of points (for example, three points) in the height direction, the rotation of the first surface material 7 and the second surface material 8 at the welding site is performed. Permissible. In addition, it replaces with the door butt side, and the door tip side site | part, specifically, the door tip side contact part of the front-end | tip side bending piece 82 of the 2nd surface material 8, and the folding piece 72 of the 1st surface material 7 C2 may be welded.

In the state where the positioning is temporarily fixed, the surface portion 80 of the second surface material 8 and the second surface of the door frame fixed to the surface portion 70 of the first surface material 7 (the second piece 32 of the lower frame 3, the intermediate vertical frame 5). The second piece 52) is not fixed. Further, in the state where the second surface material 8 is temporarily welded on one side of the door butt side (door butt side contact portion C3), the position of the second surface material 8 relative to the first surface material 7 is defined, The two-surface material 8 can be rotated with the temporarily welded side (door bottom side contact portion C3) as a fulcrum. At this stage, the surface material opening preventing member 9 and the guide rail 10 are not attached, and the rising piece 85 at the lower end of the second surface material 8 interferes with the surface material opening preventing member 9, so that the second surface material. The rotation of 8 is not hindered.

The second surface material 8 that has been temporarily fixed in positioning is rotated upward with the door butt side contact portion C3 as a temporary welding portion as a rotation fulcrum, and the surface portion 80 is moved to the second piece 32 of the lower frame 3, and the intermediate vertical frame 5 By separating the second piece 52 from the second piece 52, adhesive means (adhesive tape or adhesive application) is applied to at least a part of the second piece 32 of the lower frame 3 and the second piece 52 of the intermediate vertical frame 5 as necessary. Can be applied.

In the present embodiment, the double-sided adhesive tape T is affixed in advance to the second piece 32 of the lower frame 3 and the second piece 52 of the intermediate vertical frame 5. The predetermined surface portion 80 of the second surface material 8 is opened by opening the temporarily fixed second surface material 8, peeling off the protective film of the double-sided adhesive tape T to expose the adhesive layer, and closing the second surface material 8 again. Is bonded to the second piece 32 of the lower frame 3 and the second piece 52 of the intermediate vertical frame 5. And the 1st surface material 7 and the 2nd surface material are YAG laser welded in the upper side contact part C1, the door tip side contact part C2, and the door bottom side contact part C3. Assuming that the welding of the door bottom side contact portion C3 in the previous process is temporary welding, the welding here is main welding. The lower end portion of the door body 1 during assembly at this stage is as shown in FIG.

Finally, in the space between the lower part 700 of the surface part 70 of the first surface material 7 and the lower part 800 of the surface part 80 of the second surface material 8, one side in the width direction of the door body 1 (in this embodiment, the door The surface material opening prevention member 9 and the guide rail 10 are inserted from the opening in the lower part on the bottom side), the lower surface portion 30 of the lower frame 3, the upper surface portion 90 of the surface material opening prevention member 9, and the upper surface portion of the guide rail 10 100 are overlapped and fixed with screws S at a plurality of positions spaced in the width direction of the door body 1 (the length direction of the surface material opening preventing member 9 and the guide rail 10).

DESCRIPTION OF SYMBOLS 1 Door body 2 Upper frame 3 Lower frame 4 Door tip side frame 5 Middle vertical frame 7 1st surface material 70 Surface part 700 Lower end part 8 Second surface material 80 Surface part 800 Lower end part 9 Preventive member for surface material opening

Claims (4)

In the door lower structure of a steel door comprising a door frame, and a first surface material and a second surface material fixed to the door frame,
The steel door is a sliding door with a guide rail at the bottom of the door,
The door bottom is provided with a lower frame constituting the door frame, the lower frame is a long component extending in the door width direction, a lower surface portion extending TobiraAtsu direction, to the under surface formed thereon facing U-shape from a vertical form first piece and second piece of against said first piece, the second piece, surface of each of the first surface material, the surface portion of the second surface material Fixed,
Surface and surface of the second surface material of the first surface material is provided with a lower end portion extending downwardly beyond the lower surface of the lower frame, between the lower end portion is formed space ,
First lower bent piece and the rising-shaped first hanging piece formed by folding the space side to the lower end of each lower end portion, the second lower bent piece and the rising-shaped second hanging piece is formed And
The space is formed in the lower direction U shape from the upper surface portion and the first hanging piece and the second hanging piece extending TobiraAtsu direction, the surface member opening prevention member extending in a longitudinal direction of the lower frame is provided Yes,
The upper surface of the surface member opening prevention member is fixed to the lower surface of the lower frame, the first hanging piece, the second hanging piece is close to contact with the inner surface of the lower end portions, the first hanging piece, wherein the lower end portion of the second hanging piece respectively the first locking piece faces the second hanging piece, the first hanging piece, the lower end of the second hanging piece Are spaced apart from the first lower bent piece and the second lower bent piece, respectively.
The steel door provided with the said door lower part structure. The guide rail includes an upper surface portion, a first hanging piece, and a second hanging piece,
The first hanging piece of the guide rail is located on the opposite side of the first hanging piece of the surface material opening preventing member with the first hanging piece interposed therebetween,
The second hanging piece of the guide rail is located on the opposite side of the second hanging piece of the surface material opening preventing member with the second hanging piece interposed therebetween,
The upper surface portion of the guide rail is fixed to be overlapped with the upper surface portion of the surface material opening prevention member,
The steel door according to claim 1. A manufacturing method of a steel door using a door frame, a first surface material and a second surface material, and a surface material opening prevention member,
The steel door includes a first finding surface, a second finding surface, a door upper portion, a door lower portion, a door tip side portion, a door bottom side portion,
When the first surface material is put on the door frame, a surface portion of the first surface material forms the first finding surface, and four end portions are the door upper portion, the door lower portion, and the door end side portion, respectively. , Located on the side of the Tojiri,
When the second surface material is put on the door frame, the surface portion of the second surface material forms the second finding surface, and the four end portions are the door upper portion, the door lower portion, and the door tip side portion, respectively. , Located on the side of the Tojiri,
One end of the end of the four sides of the first surface material, and, on the end opposite the one end of the first surface material of the end portion of the four sides of the second surface material, Each of the folded hooks is formed,
When the first surface material and the second surface material are put on the door frame, three end portions of the four end portions excluding the end portion where the retaining piece is formed are the upper portion of the door. Three contact portions are formed by contact at three locations of the door lower portion, the door tip side portion, and the door bottom side portion, and the contact portions are in the door width direction or the door height direction. Extended,
The door frame includes an end frame extending in a door width direction or a door height direction according to the end portion at the end portion where the hooking piece is formed, and the end frame includes a surface portion extending in the door thickness direction. The first piece and the second piece perpendicular to the surface portion are formed in an inward U-shape,
The surface material opening prevention member is formed in an outward U-shape from a surface portion extending in the door thickness direction and a first piece and a second piece perpendicular to the surface portion, and extends in the length direction of the end frame. Extended,
Positioning and fixing the door frame to the surface portion of the first surface material;
The first surface material and the door frame fixed to the surface portion of the first surface material are positioned by covering the second surface material, and any one of the three contact portions is temporarily welded. Steps,
The second surface material is rotated with respect to the first surface material using the temporary welded portion as a rotation fulcrum, and an adhesive means is applied to at least a part of the door frame fixed to the surface portion of the first surface material. Steps,
Fixing the surface portion of the second surface material to a door frame fixed to the surface portion of the first surface material using at least a part of the bonding means;
Welding the three contact portions;
The surface material opening prevention member is placed in a space formed between peripheral surface portions of the surface portion of the first surface material and the surface portion of the second surface material that extend toward the end portion beyond the surface portion of the end frame. The first piece and the second piece of the surface material opening prevention member are inserted close to or in contact with the inner surface of each peripheral portion so that the front end faces the hooking piece. Fixing the surface portion of the material opening prevention member to the surface portion of the end frame;
The manufacturing method of the steel door provided with. The steel door is a sliding door;
The end frame is a lower frame formed in an upward U-shape from the lower surface portion and the rising first piece and the second piece,
The peripheral portion is a lower end portion extending downward beyond the lower surface portion of the lower frame, and the latching piece is formed at the lower end of the lower end portion,
The surface material opening prevention member is formed in a downward U-shape from the upper surface portion and the first and second hanging pieces,
The three abutting portions are located at the upper part of the door and extending in the door width direction, and the door-end side doors are located at the door side and door butt sides of the door body and extend in the door height direction. A contact portion and a door bottom side contact portion,
In a temporarily fixed state in which either the door tip side contact portion or the door bottom side contact portion is temporarily welded, the first surface material and the second surface material have the welding site as a rotation fulcrum. Is pivotable,
In the state where the three contact portions are welded, the surface material opening prevention member is inserted into the space from the length direction of the lower frame, and is fixed to the lower frame.
The manufacturing method of the steel door of Claim 3.

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