JP2020090823A - door - Google Patents

Abstract

To provide a door capable of omitting or simplifying a post-operation after welding.SOLUTION: In a door such as an entrance door, front and rear faces on both sides in a thickness direction are formed by surface members 15 and 16 made of two metallic sheets, and at least one end face 1C of both left and right end faces and both top and bottom end faces is formed by end parts 15C and 16C of the two surface members 15 and 16 folded in the thickness direction of the door. Tips 28 and 29 of the end parts 15C and 16C face each other in a gapless state or in a state with a small gap therebetween, the tips 28 and 29 are joined to each other at a welded part, and the welded part is a laser-welded part 34 made by a laser welding device 20.SELECTED DRAWING: Figure 7

Description

INDUSTRIAL APPLICABILITY The present invention relates to a door whose surface member is made of a metal plate material such as steel, and can be used for, for example, an entrance door or a fire door.

Patent Document 1 below discloses a door in which the front and back surfaces on both sides in the thickness direction are formed by two front surface members each made of a metal plate material such as steel. For example, such a conventional door that can be used as an entrance door or a fire door has two left and right end surfaces and two upper and lower end surfaces, at least one end surface of which is folded in the thickness direction of the door. Is formed at the ends of the surface member, and the tips of these ends face each other with no gap or with a slight gap. Further, in order to join the tips to each other, the tips are joined by welding, and this welding is performed by arc welding.

JP, 2011-69112, A

Since the welded portion due to arc welding reaches a bulge and reaches a deep position in the thickness of the surface member, in the conventional door where the above-mentioned tips are joined by arc welding, the welded portion is electrically driven to improve the appearance. A putty process is performed after polishing with a polishing tool, and after the putty is dried, the putty is polished and a finishing work is performed. Therefore, after welding, a lot of labor and time-consuming post work is performed.

It is an object of the present invention to provide a door that allows post work after welding to be omitted or simplified.

In the door according to the present invention, the front and back surfaces on both sides in the thickness direction are formed by surface members made of two metal plate materials, and at least one end surface among the left and right end surfaces and the upper and lower end surfaces has the above-mentioned thickness. It is formed by the end portions of the two surface members that are bent in the vertical direction, and the tips of these end portions face each other with or without a gap between them. In the door joined by means of a welded portion, the welded portion is a laser welded portion formed by laser welding.

As described above, in the door according to the present invention, the tips of the end portions of the two surface members that are bent in the thickness direction of the door are joined by the laser welded portion by laser welding. Since various welding work conditions such as the degree of focus of light, irradiation intensity, irradiation speed, and cooling temperature by protective gas can be changed and set, laser welding parts by laser welding can be changed and set by changing these welding work conditions. Can be made to be a depth to a shallow position in each thickness of the two surface members, thereby omitting or simplifying post-processing such as polishing work and putty processing work performed after the laser welding work. You will be able to.

Therefore, in the door according to the present invention when the laser welded portion by laser welding reaches the shallow positions in the respective thicknesses of the two surface members as described above, the laser welded portion has two laser welded portions. The depth is up to a part of the thickness of each end of the surface member.

Further, in order to make the laser-welded portion by laser welding reach a shallow position in each of the thicknesses of the two surface members, the laser-welded portion is provided with a laser beam at the focal point of the laser beam. It may be formed by irradiating the tip portions with the positions separated from each other.

According to this, since the laser light is radiated to the above-mentioned tips with a spread and the energy of the laser light is not concentrated at one point, the laser welded portion by laser welding can be formed into one of the thicknesses of the end portions of the two surface members. The depth up to the portion can be realized more reliably, and the tips can be joined to each other by the laser-welded portion having a spread.

Further, in the door according to the present invention described above, in order to make the outer surfaces of the end portions of the two surface members bent in the thickness direction of the door flush with each other or substantially flush with each other, The part may be a fitting part in which a protrusion provided at one tip is fitted in a groove provided at the other tip.

According to this, the part between the tips becomes a fitting part in which the protrusion provided at one tip fits into the groove provided at the other tip, and the protrusion provided at one tip is By fitting into the groove provided at the other end, the outer surfaces of the end portions of the two surface members bent in the thickness direction of the door can be made flush or substantially flush. Therefore, after the laser welding work, it becomes unnecessary or simple to carry out a finishing work such as a polishing work for making the outer surfaces of the end portions flush with each other or substantially flush with each other. It is possible to facilitate the whole door manufacturing work and shorten the work time.

The fitting of the protrusion provided at one tip as described above into the groove provided at the other tip, for example, projects the protrusion in a V shape toward the other tip side. A V-shaped protrusion, the groove is opened toward the one end side, and is recessed in a V shape on the side opposite to the one end side, and the V-shaped protrusion is fitted. This can be achieved by using a V-shaped groove, or the protrusion is a rectangular protrusion protruding in a rectangular shape toward the other tip side, and the groove is opened toward the one tip side. It is also possible to achieve this by forming a rectangular groove portion that is recessed in a rectangular shape on the side opposite to the one tip side and into which the rectangular protrusion is fitted.

Of these, according to the former, the protrusion is a V-shaped protrusion, the groove is a V-shaped groove into which the V-shaped protrusion is fitted, and the V-shaped protrusion and the V-shaped groove are combined. Since the shape is simple, it is possible to more reliably form the V-shaped protrusion and the V-shaped groove in the thickness of the end portions of the two surface members bent in the thickness direction of the door. become able to.

In addition, as described above, when the laser welded portion by laser welding has a depth to a shallow position in each thickness of the two surface members, the protrusion is a V-shaped protrusion, and the groove is In the case of the V-shaped groove into which the V-shaped protrusion is fitted, the depth of the laser welded portion may be a depth that does not reach the tip of the V-shaped protrusion.

According to this, since the tip of the V-shaped projection does not become the laser welded portion, the fitting state of the V-shaped projection including the tip and the V-shaped groove is maintained before and after the laser welding work. By this, it is possible to ensure that the outer surfaces of the end portions of the two surface members bent in the thickness direction of the door are flush with each other or flush with each other even after the laser welding operation. ..

In the door according to the present invention described above, the metal used as the material of the surface member may be steel, stainless steel, aluminum or aluminum alloy, copper or the like, and laser welding is possible. The material of is good.

Further, the laser welded portion by laser welding may be a spot welded portion in which laser welded portions are scattered at intervals, or may be a seam welded portion having a continuous length.

Further, according to the present invention, the front and back surfaces on both sides in the thickness direction of the door are formed by surface members made of two metal plate materials, and at least one of the left and right end surfaces and the upper and lower end surfaces is a door. Doors that are formed by the ends of two surface members that are bent in the thickness direction of the door, and the tips of these ends face each other with or without a gap. Therefore, in the present invention, at one or a plurality of end faces, the force bone which is the structural material of the door is exposed, and the force bone is bent in the thickness direction of the door. It can also be applied to a door that is not covered by the end portions of the two surface members.

Further, the welding work by the laser welding device may be performed by moving the door set on the workbench such as a table with respect to the laser welding device installed in a fixed state, or the work of the table or the like. The laser welding device may be moved with respect to the door fixedly set on the table. When moving the laser welding device, this movement may be performed by a robot.

Further, the present invention can be applied to a door for any application as long as the front and back surfaces on both sides in the thickness direction are doors formed by two surface members made of metal plate materials. For example, a front door The present invention can be applied to a fire door, a fireproof door, a waterproof door, and the like. Further, the present invention can also be applied to a sliding door for a sliding door device, a folding door for a folding door device, and the like. ..

According to the present invention, since the welded portion is the laser welded portion, it is possible to obtain an effect that post-work after welding can be omitted or simplified.

FIG. 1 is a perspective view showing an entrance door and a door frame which are doors according to an embodiment of the present invention. FIG. 2 is a perspective view showing only the entrance door. FIG. 3 is a front view of the entrance door. FIG. 4 is a sectional view taken along line S4-S4 of FIG. FIG. 5 is a sectional view taken along line S5-S5 of FIG. FIG. 6 is a front view showing the surface member before the end portion is bent in the thickness direction of the entrance door. FIG. 7: is a conceptual diagram which shows the laser welding operation by a laser welding apparatus.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 shows a hinged door device in which a door according to an embodiment of the present invention is used as a hinged door. Since the hinged door device is an entrance door device, the door according to the present invention is an entrance door 1. .. The entrance door 1 is attached to a door frame 2 of a four-sided frame formed by an upper frame member 2A, a lower frame member 2B, and left and right side frame members 2C and 2D so as to be openable and closable by a hinge 3. Further, the entrance door 1 is provided with a door knob 4 and locking devices 5 and 6.

FIG. 2 is an overall perspective view of the front door 1 without the door knob 4 and the locking devices 5 and 6, that is, the front door 1 before the door knob 4 and the locking devices 5 and 6 are installed, and FIG. Shows an entire front view of the entrance door 1. As shown in FIG. 3, on the four end surfaces of the entrance door 1 which are quadrangular in a front view, that is, inside the left and right end surfaces 1A and 1B and the upper and lower end surfaces 1C and 1D, As the structural material of the entrance door 1, the force bones 11, 12, 13, and 14 forming the outer contour shape of the entrance door 1 are arranged. These force bones 11 to 14 are the entrance doors. 1 is covered with two front and back surface members 15 and 16 of FIG. 2 arranged on both sides in the thickness direction, and inside the entrance door 1 to reinforce the strength of the entrance door 1. The three reinforcing members 17 and 18 are also arranged.

4 is a sectional view taken along the line S4-S4 of FIG. 3, and FIG. 5 is a sectional view taken along the line S5-S5 of FIG. 3. As shown in FIGS. The interior of the door 1 is filled with a filling material 19 such as a paper core having fireproofness.

As shown in FIG. 4, the force bones 11 and 12 disposed inside the left and right end surfaces 1A and 1B of the entrance door 1 include webs 11A and 12A and a pair of flanges 11B, 11C and 12B. , 12C, and as shown in FIG. 5, the force bones 13 and 14 disposed inside the upper and lower end surfaces 1C and 1D of the entrance door 1 also have webs. 13A, 14A and a pair of flanges 13B, 13C, 14B, 14C are formed of a channel material, and the reinforcing members 17, 18 are also formed of the channel material similarly to the force bones 11-14.

As shown in FIG. 4, the left and right end portions 15A, 15B, 16A, 16B of the surface members 15, 16 are bent in the thickness direction of the entrance door 1, and the left end portion 15A of the surface member 15 is formed. The left end 16A of the surface member 16 is covered with the web 11A of the power bone 11, and the right end 15B of the surface member 15 and the right end 16B of the surface member 16 are attached to the power bone 12. Covered with web 12A. In addition, as shown in FIG. 5, the upper and lower end portions 15C, 15D, 16C, 16D of the surface members 15, 16 are bent in the thickness direction of the entrance door 1, and the upper end of the surface member 15 is bent. The portion 15C and the upper end 16C of the surface member 16 are covered with the web 13A of the strength bone 13, and the lower end 15D of the surface member 15 and the lower end 16D of the surface member 16 are The web 14A of the strength bone 14 is covered.

FIG. 6 shows the surface member 15' before the ends 15A, 15B, 15C, 15D of the surface member 15 are bent in the thickness direction of the entrance door 1. This surface member 15′ is formed into four end portions 15A, 15B, 15C, and 15D by punching four corner portions of a square metal plate material at right angles, and end portions 15′A, 15′B, 15′C, 15'D is formed on the four sides, and the four end portions 15A and 15B bent in the thickness direction of the entrance door 1 are formed by bending the two-dot chain line shown in FIG. , 15C, 15D is manufactured. The surface member 16 including the four ends 16A, 16B, 16C, 16D bent in the thickness direction of the entrance door 1 is also manufactured in the same manner as the surface member 15.

In the above, the material of the two surface members 15 and 16 forming the front and back surfaces on both sides in the thickness direction of the entrance door 1 is steel, and therefore the entrance door 1 is a steel door. Then, these surface members 15 and 16 are fixed to the flanges 11B, 11C, 12B, 12C, 13B, 13C, 14B and 14C of the strength bones 11 to 14 and the flanges of the reinforcing members 17 and 18 with an adhesive agent. The end portions 15A to 15D and 16A to 16D of the surface members 15 and 16 are not fixed to the webs 11A to 14A of the force bones 11 to 14.

FIG. 7 shows an enlarged cross-sectional view of the upper end portions 15C and 16C of the end portions 15A to 15D and 16A to 16D of the surface members 15 and 16, and FIG. 7 shows these end portions 15C. , 16C of the laser welding apparatus 20 for joining the tips 28, 29 of the 16C by welding. The laser welding device 20 sends an oscillator 21, a head 23 connected to the oscillator 21 by an optical path 22, a tank 24 filled with a protective gas such as argon gas, and a protective gas from the tank 24 to the head 23. And a gas supply pipe 25 for use in the head 23. The laser light 26 collected from the head 23 by an optical system component such as a lens housed inside the head 23 has no gap between them. The tip end 28 of the end portion 15C and the tip end 29 of the end portion 16C which face each other in a state or with a slight gap therebetween are irradiated, and the protective gas 27 is also jetted toward these tip ends 28, 29. It is supposed to be done. The protective gas 27 prevents the laser-welded portion from being oxidized during cooling, thereby obtaining a good finished surface.

In the present embodiment, the tip 28 of the end portion 15C of the surface member 15 is provided with a protrusion 30 that projects toward the tip 29 of the end portion 16C of the surface member 16, and the end portion 16C of the surface member 16 is provided. A groove portion 31 for fitting the protrusion 30 is provided at the tip 29 of the. Therefore, the portions between the tips 28 and 29 facing each other in the butted state or the substantially butted state are a fitting portion in which the projection 30 and the groove 31 are fitted.

In particular, the protrusion 30 according to the present embodiment is a V-shaped protrusion that protrudes in a V shape toward the tip 29 side of the end portion 16C of the surface member 16, and the groove portion 31 is formed in the surface member 15. The end portion 15C is open toward the tip 28 side and is recessed in a V shape on the side opposite to the tip 28 side to form a V-shaped groove portion into which the V-shaped protrusion 30 is fitted. .. Thereby, when the V-shaped protrusion 30 is fitted into the V-shaped groove 31, the outer surface 32 of the end 15C of the surface member 15 and the end 16C of the surface member 16 covering the web 13A of the force bone 13 described above. The outer surface 33 is in a flush state or a substantially flush state.

The above V-shaped protrusion 30 and V-shaped groove 31 are provided over the entire length of the upper end portions 15C, 16C of the surface members 15, 16 in the left-right direction, in other words, over the entire length of the entrance door 1 in the left-right direction. Has been. The V-shaped protrusion 30 and the V-shaped groove 31 are provided over the entire length of the entrance door 1 in the left-right direction at the lower ends 15D, 16D of the surface members 15, 16. Further, the V-shaped protrusion 30 and the V-shaped groove 31 are provided over the entire length in the vertical direction of the entrance door 1 at the left and right ends 15A, 15B, 16A, 16B of the surface members 15, 16. Therefore, the left and right end surfaces 1A and 1B and the upper and lower end surfaces 1C and 1D of the entrance door 1 are provided with fitting portions in which the V-shaped protrusions 30 and the V-shaped groove portions 31 are fitted. It will be.

The thickness of the surface members 15 and 16, that is, the thickness of the end portions 15A to 15D and 16A to 16D is, for example, 1.6 mm, and the V-shaped protrusion 30 and the V-shaped protrusion 30 have such a thickness. Since the V-shaped projection 30 and the V-shaped groove 31 have a simple shape, the provision of the groove portion 31 is performed by, for example, grinding the tips of these end portions 15A to 15D and 16A to 16D. Can be implemented more easily.

As shown in FIG. 7, when laser welding the laser light 26 emitted from the head 23 of the laser welding device 20 to the tips 28 and 29 of the end portions 15C and 16C of the surface members 15 and 16, respectively. The laser light 26 is irradiated to the tips 28 and 29 with the position of the focus 26A of the laser light 26 deviating from the tips 28 and 29. In addition to this, the irradiation intensity and the like based on the laser output in the oscillator 21 is also adjusted, and thereby the depth of the laser welded portion 34 formed between the tips 28 and 29 is set to the depth of the surface members 15 and 16. It is assumed that the respective total thicknesses of the end portions 15C and 16C, which are also the respective total thicknesses, are not reached, and the depth of the laser welding portion 34 is set to a depth up to a part of the respective thicknesses of the end portions 15C and 16C. To do. The depth of the laser welded portion 34 of the present embodiment shown in FIG. 7 has an isosceles triangular shape or a substantially isosceles triangular shape and protrudes toward the tip 29 of the end portion 16C of the surface member 16. The depth does not reach the pointed portion 30A of the V-shaped protrusion 30.

Welding the tips 28 and 29 of the end portions 15C and 16C of the surface members 15 and 16 with the laser welding device 20 is performed by setting the laser welding device 20 fixedly installed on a work table such as a table. The laser welding apparatus 20 is moved by moving the entrance door 1 or the entrance door 1 fixedly set on a workbench such as a table. Thereby, by continuously irradiating the laser light 26, the laser welded portion having a continuous length in the left-right direction, which is the width direction of the entrance door 1, is formed at the portions between the tips 28, 29 of the end portions 15C, 16C. 34 is formed as a seam welded portion, or by intermittently irradiating the laser light 26, the laser welded portion 34 is formed as spot welded portions scattered in the left-right direction.

When the above laser welding work is performed, even if the end portions 15C and 16C of the surface members 15 and 16 are not fixed to the force bone 13 with an adhesive, the tips 28 and 29 of these end portions 15C and 16C are laser-welded. It will be joined by the welded portion 34.

The welding operation by the laser welding device 20 described above is also performed to join the tips 28, 29 of the other end portions 15A, 15B, 15D, 16A, 16B, 16D of the surface members 15, 16 to each other. Of course, in the case where there are parts such as the latch member of the door knob 4 shown in FIG. 1 and the dead bolts of the locking devices 5 and 6 that are arranged in the entrance door 1 at the portions where the tips 28 and 29 are joined together. Provides the laser welded portion 34 at a position avoiding these parts.

According to the present embodiment described above, the tip ends 28, 29 of the end portions 15A to 15D, 16A to 16D of the two surface members 15 and 16 that are bent in the thickness direction of the door 1 of the entrance door 1 are lasers. The laser welding is performed by welding at the laser welding portion 34, and the laser welding can change and set various welding work conditions such as the irradiation intensity of the laser beam 26. By changing and setting these welding work conditions, laser welding can be performed. As can be seen from the above description, the depth of the laser welded portion 34 by welding can be set to a depth of a part of the thickness of each of the end portions 15A to 15D and 16A to 16D of the surface members 15 and 16. Therefore, unlike the case where the depth of the laser welded portion 34 reaches the entire or substantially the entire thickness of each of the end portions 15A to 15D and 16A to 16D, after the laser welding operation, a polishing operation and a putty treatment are performed. Post-work such as work can be omitted or simplified.

Further, in the present embodiment, since the laser light 26 is emitted from the head 23 with the position of the focal point 26A of the laser light 26 deviating from the tips 28 and 29, the energy of the laser light 26 is one point. Therefore, it is more certain that the depth of the laser welded portion 34 is set to a depth of a part of the thickness of each of the end portions 15A to 15D and 16A to 16D of the surface members 15 and 16 for this reason. This can be realized, and the tips 28 and 29 can be joined to each other by the laser welding portion 34 having a widthwise spread.

Further, in the present embodiment, the end portions 15A to 15D of the surface members 15 and 16 and the tips 28 and 29 of the ends 16A to 16D are provided with the protrusion 30 provided at one tip 28 at the other tip 29. The fitting portions are fitted in the groove portions 31 formed so that the outer surfaces 32 and 33 of the end portions 15A to 15D and 16A to 16D can be made flush or substantially flush. Therefore, after the laser welding work, it becomes unnecessary or simple to carry out a finishing work such as a polishing work for bringing the outer surfaces 32 and 33 into a flush state or a substantially flush state with each other. It is possible to facilitate the entire manufacturing work of the above and shorten the work time.

In addition, in the present embodiment, fitting the protrusion 30 into the groove 31 means that the protrusion 30 is a V-shaped protrusion protruding in a V-shape, and the groove 31 is recessed in a V-shape. , The V-shaped projection 30 is fitted into the V-shaped groove, and the V-shaped projection 30 and the V-shaped groove 31 have simple shapes. The protrusion 30 and the V-shaped groove 31 can be easily formed by grinding or the like on the ends 15A to 15D and 16A to 16D having a thickness of, for example, about 1.6 mm.

Further, since the depth of the laser welded portion 34 of the present embodiment does not reach the pointed portion 30A of the V-shaped protrusion 30, the pointed portion 30A does not become the laser welded portion 34. Therefore, the fitting state of the V-shaped protrusion 30 including the pointed head portion 30A and the V-shaped groove portion 31 is maintained before and after the laser welding operation, whereby the end portions 15A to 15D, 16A. It is possible to keep the outer surfaces 32, 33 of the ~ 16D flush with each other or substantially flush with each other even during the laser welding operation in which a part of the end portions 15A to 15D, 16A to 16D is melted. Thus, the outer surfaces 32, 33 of the end portions 15A to 15D, 16A to 16D can be made flush with each other or substantially flush with each other even after the laser welding work. Therefore, after the laser welding work, these outer surfaces 32, 33 can be made. The finishing work such as polishing work for bringing the two into a flush state or a substantially flush state can be more reliably unnecessary or simplified.

INDUSTRIAL APPLICABILITY The present invention can be used for doors such as entrance doors and fireproof doors in which the surface member is formed of a metal plate material such as steel.

Front door 1 which is 1 door
1A-1D End surface 15,16 Surface member 15A-15D, 16A-16D End 20 Laser welding device 26 Laser light 26A Focus 28,29 Tip 30 V-shaped projection 30A Tip 31 V-shaped Groove 32, 33 outer surface

Claims (6)

The front and back surfaces on both sides in the thickness direction are formed by surface members made of two metal plate materials, and at least one of the left and right end surfaces and the upper and lower end surfaces is bent in the thickness direction. It is formed by the ends of the two surface members, and the ends of these ends face each other without a gap or with a slight gap, and the ends are joined by a welded portion. At the door
A door characterized in that the welded portion is a laser welded portion formed by laser welding. The door according to claim 1, wherein the laser welding portion has a depth up to a part of the thickness of each of the end portions of the two surface members. The door according to claim 2, wherein the laser welded portion irradiates the tip end portions with laser light with a focus position of the laser light being a position deviated from the tip ends. And the door. The door according to claim 2 or 3, wherein in order to make the outer surfaces of the end portions of the two surface members flush with each other or flush with each other, the portion between the tips is provided at one tip. The door is characterized in that the protruding portion is a fitting portion that is fitted into a groove portion provided at the other end. The door according to claim 4, wherein the protrusion is a V-shaped protrusion that protrudes in a V-shape toward the other tip side, and the groove portion opens toward the one tip side. Further, the door is characterized in that it is recessed in a V-shape on the side opposite to the one end side, and is a V-shaped groove into which the V-shaped projection is fitted. The door according to claim 5, wherein the depth of the laser welded portion is such that the laser welded portion does not reach the tip of the V-shaped protrusion.

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