JP2016188468A - Metallic door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metallic door in which a large warp in a thickness direction can be suppressed even when there is a temperature difference between both sides of the door in the thickness direction.SOLUTION: A metallic door of the present invention is constituted by including a framework 16 having a quadrangle shape in a front view and whose upper, lower, left and right side parts are formed of four metallic ribs 11-14, and by attaching two metallic surface members 17 on front and rear sides of the framework 16. The two surface members 17 are coupled to the rib that forms at least one side part among the upper, lower, left and right side parts of the framework 16, with coupling parts such as flat head screws 20, 22, 24, 26. The coupling parts each has a length not long enough for the length of one side part or has a point shape whose length is short.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a metal door in which the skeleton and the surface material are made of metal, and can be used, for example, for a sliding door type door or a sliding door of a sliding door device.

  The following Patent Document 1 shows a metal door used as an entrance door or the like, and this metal door has an upper side, a lower side, a left side, and a right side that are square in a front view. Is formed by four metal skeletons, and two metal surface materials are attached to the front and back of the framework. And in this metal door, the bending piece is formed by the bending process in the edge part of two surface materials, and the edge part of the bending piece which covers the outer side of the width direction of a strength frame is joined by welding. This weld is continuous in the length direction of the sword.

JP 2002-70431 A

  As described above, the end portions of the bent pieces that are formed at the end portions of the two surface materials and cover the outer side in the width direction of the steel frame are joined together by welding, and this weld portion is the length of the strength frame. If one side in the thickness direction of the metal door becomes hot due to heat from a fire, etc., the temperature of the other side is lower than this high temperature. Therefore, the elongation deformation of the surface material on the high temperature side is constrained by the surface material on the low temperature side over the entire length in the length direction of the skeleton, and therefore, the metal door is greatly warped in the thickness direction. Will occur.

  An object of the present invention is to provide a metal door capable of suppressing the occurrence of a large warp in the thickness direction even when a temperature difference occurs between both surfaces in the thickness direction.

  In the metal door according to the present invention, the upper side, the lower side, the left side, and the right side of the frame that is square when viewed from the front are formed by four metal skeletons. In the metal door formed by attaching the two surface materials, at least one of the upper side, the lower side, the left side, and the right side, the two surfaces The material is joined to the skeleton forming the side by a joint, and the joint does not have a length in the length direction of the one side or is short. It is the connection part of this.

  As described above, in the metal door according to the present invention, at least one of the upper side portion, the lower side portion, the left side portion, and the right side portion, the force that the two surface materials form this side portion. Although it is connected to the bone by a connecting portion, this connecting portion is a point-like connecting portion that does not have the length in the length direction of the one side portion or has a short length. In the joint part, the two surface materials are connected to each other via a rib. Therefore, if a temperature difference occurs between both surfaces in the thickness direction due to the occurrence of a fire, etc., the deformation of the surface material on the high temperature side is deformed. Is constrained by the surface material on the low temperature side, but in the place where the joint portion is not provided, the two surface materials are not connected via the ribs. Therefore, the entire door is subject to large warpage in the thickness direction. So it can be suppressed.

  In the above, the number of connecting portions may be one, or a plurality of connecting portions separated in the length direction of the side portions. Further, this number may be the number of each of the two surface materials, or the number of the two surface materials combined.

  Further, in only one side of the upper side, the lower side, the left side, and the right side, two surface materials are coupled to the skeleton forming the side by a coupling unit, and the coupling unit However, it may be a dot-like connecting portion that does not have the length in the length direction of the one side portion or has a short length, but the upper side portion, the lower side portion, the left side portion, and the right side portion. In the opposite side that is opposite to the one side and is parallel to the one side, two surface materials are formed on the opposite side. It is good also as a dotted | punctate coupling | bond part which does not have the length of the length direction of an opposing side, or short length while it couple | bonds with the existing strength bone by a coupling | bond part.

  According to this, it is possible to realize in both the one side portion and the opposite side portion that the elongation deformation of the surface material on the high temperature side is not constrained by the surface material on the low temperature side as described above. Thus, it is possible to more effectively suppress the occurrence of a large warp in the thickness direction.

  In this way, when the coupling portions are provided on the opposing side portions, the number of the coupling portions may be one, or may be a plurality separated in the length direction of the opposing side portions. Further, this number may be the number of each of the two surface materials, or the number of the two surface materials combined.

  Further, in this way, in both the one side portion and the opposite side portion, the two surface materials are coupled to the skeleton forming these sides by a coupling portion, In the case of a point-like coupling portion that does not have a length in the length direction of these side portions or a short length, the coupling portion of the one side portion and the coupling portion of the opposite side portion, You may provide in the same distance or the substantially same distance from the edge part of the same side of the length direction of these edge parts.

  According to this, it is the same distance or substantially the same from the end on the same side in the length direction of the one side and the opposite side that the elongation deformation of the surface material on the high temperature side is not restrained by the surface material on the low temperature side. Since it can be realized at a distance, it is possible to more effectively suppress the occurrence of a large warp in the thickness direction in the entire door.

  Further, as described above, one of the upper side, the lower side, the left side, and the right side is opposed to the one side and is parallel to the one side. The two facing members are joined to the strength bones forming these sides by a joining portion, and this joining portion is connected in the longitudinal direction of these sides. In the case of a point-like coupling portion having no length or a short length, the one side portion and the opposite side portion are longer sides than the two side portions excluding these side portions. Although it is good also as a part, it is preferable to make the said 1 side part and an opposing side part into a side part whose length is shorter than two side parts except these sides.

  That is, when the metal door according to the present invention is a rectangular vertically long door having a vertical dimension larger than the left and right width dimensions in front view, the one side part and the opposite side part are the upper side part. And the two sides excluding the one side and the opposite side are the left side and the right side, and the upper side and the lower side are shorter than the left side and the right side. It is preferable to provide a connecting portion, and according to this, warping in the thickness direction occurs more greatly along the left side and the right side which are long side portions, and thus such a large warp occurs. Can be suppressed.

  In addition, the above-described connecting portions may be provided on the upper side, the lower side, the left side, and the right side of the above-described frame of the metal door according to the present invention, that is, on all the sides, or these sides. You may provide in three edge parts among parts.

  In addition, the four strength frames forming the upper side, the lower side, the left side, and the right side and the two surface materials are bonded with an adhesive, and the connecting portion is made more than the adhesive. The two surface materials may be bonded to the strong bone by a fastening device having heat resistance against a high temperature.

  According to this, the portion of the surface material that is not bonded to the strength bone by the bonding tool can be bonded to the strength bone with the adhesive, and the bonding portion has heat resistance to a temperature higher than that of the adhesive. Since the two surface materials are bonded to the skeleton by the fasteners, even if the adhesive strength of the adhesive disappears due to the heat of a fire or the like, It is possible to maintain the bonding state with the skeleton, and to suppress the occurrence of a large warp in the thickness direction by the disappearance of the adhesive force of the adhesive due to heat such as a fire.

  Furthermore, when the metal door according to the present invention is manufactured by baking coating on the surface of two surface materials, the heat-resistant temperature of the adhesive, in other words, the adhesive It is preferable that the temperature at which the adhesive force disappears due to heat is higher than the temperature of baking coating.

  According to this, even if the four strength bones and the two surface materials are bonded with an adhesive, and then the surface of the two surface materials is baked and painted, The adhesive force of the agent does not disappear, and the adhesive state between the strength bone and the surface material by this adhesive agent can be maintained.

  Moreover, the metal door which concerns on this invention forms 1 side part except the said 1 side part and the said opposing side part among an upper side part, a lower side part, a left side part, and a right side part 1 The length of one of the bones is bonded with an adhesive that is not bonded to the surface of the book and the two surface materials by the bonding portion and whose heat-resistant temperature is lower than that of the bonding portion. Both end faces of the two side walls that have reached the same position or substantially the same position as the outer end faces in the width direction of the two ribs forming the one side part and the opposite side part, The surface material is preferably provided with a bent piece sandwiching the one force bone together with the two strength ribs forming the one side portion and the opposite side portion.

  According to this, one strength frame and two surface materials that form one side portion excluding the one side portion and the opposite side portion are not coupled by the coupling portion, Even if the adhesive is bonded with an adhesive whose heat-resistant temperature is lower than that of the joint portion, both end faces in the length direction of the single rib form the one side portion and the opposite side portion. It has reached the same position or almost the same position as the outer end face in the width direction of the two shin bones, and the two surface materials are formed with the one side portion and the opposite side portion. Since the bent piece sandwiching the one power bone is provided together with the two power bones, even if the adhesive force of the adhesive disappears due to heat of fire or the like, the one power bone The two side walls forming the one side and the opposite side and the two front faces It can be prevented by bent piece and the wood.

  In addition, when the metal door according to the present invention is configured as described above and the metal door is a metal door that opens and closes around the hinge, the one skeleton is a force on the door-end side. It is a bone, and it is arranged opposite to the doorside side bone in the left and right direction. A folding piece formed to cover the outer surface in the width direction of the door-side skeleton is secured by a fastener for fixing the door-side blade of the hinge to the door-side skeleton. May be combined.

  According to this, the door-side wings and the bent pieces formed on the two surface materials to cover the outer surface in the width direction of the door-side skeletons are the door-side blades of the hinges. Since the plate is joined by a fastener that secures the plate to the heel of the door butt, the adhesive that bonds the heel of the door butt and the surface material is heated by heat, etc. Even if it disappears, it is possible to prevent the occurrence of a situation in which the power of the door butt side falls within the door.

  In the present invention described above, the metal that is the material of the hard bone and the surface material may be steel (steel), stainless steel, or any metal material. The fastening device described above may be a screw, a rivet, or a staple. Further, the connecting portion may be made of screws, rivets, or staples, but may be made of an adhesive having a higher heat resistance temperature than the above-described adhesive.

  Further, in the case where the coupling portion is made of a fastening tool such as a screw or a rivet, as described above, the point-shaped coupling portion that does not have the length in the length direction of the side portion or has a short length, The diameters of the circular or substantially circular heads and shafts of these fasteners may be, for example, as small as about 1/1000 to 1/100 compared to the length of the side. In the case where the fastening device has a length such as a staple, for example, when the direction of the length is made to coincide with the length direction of the side portion, the direction of the length is changed to the length of the side portion. The same applies to both the case where the length is perpendicular to the length direction.

  Furthermore, as described above, the number of joints may be one, or a plurality of joints may be separated in the length direction of the side part. It is preferable to arrange these connecting portions at equal intervals in the length direction of the side portions in order to separate the places where the elongation deformation is constrained in the length direction of the side portions. In the case of a single piece, it is preferable to provide a coupling portion at the central portion in the length direction of the side portion.

  Also, as the number of joints increases, the number of places where elongation deformation of the surface material on the high temperature side is restricted increases, so it is not preferable to increase the number of joints, and the length of the side where the joints are provided However, for example, if it is about 700 mm to 2100 mm, it is preferable that the number of coupling portions is about 1 to 4.

  That is, it is possible to secure the strength of the joint between the strength bone and the surface material by the joint portion, and in a place where the joint portion is not provided, the elongation deformation of the surface material on the high temperature side is not constrained. As long as the occurrence of a large warp in the thickness direction can be suppressed, the size and number of the coupling portions, the arrangement position of the coupling portions, and the like are arbitrary.

  Furthermore, the present invention can be applied to a metal door installed at an arbitrary place for an arbitrary use, an example of which is a front door and another example of a metal door is In addition, the door is a door for a warehouse, and the present invention can also be applied to a metal sliding door of a sliding door device.

  According to the present invention, even if a temperature difference occurs between both sides of the metal door in the thickness direction, it is possible to obtain an effect that a large warp in the thickness direction can be suppressed.

FIG. 1 is a front view showing an entire metal door according to an embodiment of the present invention. FIG. 2 is a front view showing a door main body from which the attached members such as a lever type handle and a door closer are removed from the metal door shown in FIG. 3 is a cross-sectional view taken along line S3-S3 of FIG. 4 is a cross-sectional view taken along line S4-S4 of FIG. 5 is a cross-sectional view taken along line S5-S5 of FIG. 6 is a cross-sectional view taken along line S6-S6 of FIG. FIG. 7 is a front sectional view showing a part of the internal structure of the door body. FIG. 8 is a side view showing a fore edge surface of the door main body side.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on drawing. FIG. 1 shows a front view of a metal door according to an embodiment of the present invention. This metal door is a steel entrance door 1, and FIG. 1 shows this steel entrance door. It is the front view which looked at 1 from the outdoor side. The front door 1 is disposed at an entrance which is an opening inside a door frame 2 attached to a structural frame of a building, and is rotatably attached to the door frame 2 by a hinge 3. . Therefore, the end of the front door 1 opposite to the left and right sides of the hinge 3 side, that is, in the embodiment of FIG. 1, the left end is the door end 1A, and the right end The part is the end 1B on the door end side.

  In the vicinity of the door end 1 </ b> A, a lever-type handle 4 that is a gripping member for opening and closing the front door 1 and a locking device 5 for locking the front door 1 are provided. A door closer 6 is attached to the upper part of the entrance door 1 on the interior side surface of the entrance door 1.

  FIG. 2 shows a front view of the door main body 10 excluding the lever type handle 4, the locking device 5, and the door closer 6 which are attached members of the entrance door 1. Further, in FIG. 2, an upper skeleton 11, a lower skeleton 12, a left skeleton 13, and a right skeleton 14, which are structural members of the entrance door 1, are arranged side by side in the left-right direction. The three inner bones 15 are shown, and among these, the four strength bones of the upper strength bone 11, the lower strength bone 12, the left side strength bone 13, and the right side strength bone 14 are shown in front view. A frame 16 having a square shape is formed. Further, the upper side of the frame 16 is formed by the upper side rib 11, the lower side is formed by the lower side bone 12, the left side is formed by the left side bone 13, and the right side is formed by the right side bone 14.

  And the lower side part formed with the lower side rib 12 with respect to the upper side part formed with the upper side rib 11 is opposed to the upper side part in the vertical direction, and is parallel to the upper side part. It is on the opposite side. In addition, the right side portion formed by the right side force frame 14 is opposed to the left side portion in the left-right direction with respect to the left side portion formed by the left side strength frame 13 and is parallel to the left side portion. It is on the opposite side.

  3, FIG. 4, FIG. 5 and FIG. 6 are sectional views taken along lines S3-S3, S4-S4, S5-S5 and S6-S6 in FIG. 2, respectively. As shown, two surface materials 17 and 18 are attached to the front and back of the frame 16. As can be seen from FIG. 3 to FIG. 6, the upper strength bone 11, the lower strength bone 12, the left side strength bone 13, the right side strength bone 14, and the middle bone 15 include the base portions 11A, 12A, 13A, 14A, and 15A. From a pair of flange portions 11B, 11C, 12B, 12C, 13B, 13C, 14B, 14C, 15B, 15C extending in the same direction from both ends of these base portions 11A, 12A, 13A, 14A, 15A FIGS. 3 to 5 show the base portions 11A and 12A of the upper and lower ribs 11 and 12 forming the upper and lower sides of the frame 16, respectively. As described above, since the upper and lower edges of the upper frame 11 and the lower frame 12 are arranged at both upper and lower edges of the frame 16, the opening side is arranged inside the frame 16. Further, the base portions 13A and 14A of the left side force frame 13 and the right side force frame 14 forming the left side portion and the right side portion of the frame 16 are provided at both left and right edges of the frame 16 as shown in FIG. Since these are arranged, the left side force frame 13 and the right side force frame 14 are also arranged with the opening side inside the frame 16.

  Further, as shown in FIGS. 3 to 6, bent pieces 17 </ b> A, 17 </ b> B, and 17 </ b> C are provided at the upper end, the lower end, the left end, and the right end of the two surface members 17 and 18. , 17D, 18A, 18B, 18C, 18D, of which the outer surface in the width direction of the upper radius 11 is covered by the bent pieces 17A and 18A, in other words, the upper surface of the upper radius 11 is covered. The outer surface in the width direction of the lower rib 12 is covered by the bent pieces 17B and 18B, in other words, the lower surface of the lower rib 12 is covered, and the outer surface in the width direction of the left rib 13 is covered by the bent pieces 17C and 18C. However, in other words, the left surface of the left side rib 13 is covered, and the outer surfaces in the width direction of the right side rib 14 are covered with the bent pieces 17D and 18D, in other words, the right surface of the right side rib 14 is covered.

  In the above, since the entrance door 1 which concerns on this embodiment is a steel door, the materials of the strength frames 11-14 which are the components of the entrance door 1, the middle bone 15, and the surface materials 17 and 18 are steel (steel). It is.

  As shown in FIG. 2, in the location of a distance A from the door-side end 10 </ b> A of the door body 10, which is the door-side end 1 </ b> A of the entrance door 1 of FIG. 1, as shown in FIG. 3. As shown, the bent pieces 17A and 18A of the two surface materials 17 and 18 are coupled to the base portion 11A of the upper strength bone 11 by the countersunk screws 20 and 21, and the base of the lower strength bone 12 is provided. Bending pieces 17B and 18B of two surface materials 17 and 18 are coupled to the portion 12A by countersunk screws 22 and 23. 5 is shown in FIG. 5 at a distance B from the door 10 side end 10B of the door body 10 in FIG. 2, which is the door 1 end 1B of the entrance door 1 shown in FIG. As shown, the bent portions 17A and 18A of the two surface members 17 and 18 are coupled to the base portion 11A of the upper strength bone 11 by countersunk screws 24 and 25, and the base portion of the lower strength bone 12 Bending pieces 17B and 18B of two surface materials 17 and 18 are joined to 12A by countersunk screws 26 and 27.

  For this reason, the countersunk screws 20 to 27 serve as fasteners for connecting the bent pieces 17A, 17B, 18A, and 18B of the surface materials 17 and 18 to the base portions 11A, 12A, and 14A of the strength frames 11 and 12, respectively. In addition, the place where the countersunk screws 20 to 27 are arranged is a connecting portion in which the strength frames 11 and 12 and the surface materials 17 and 18 are connected by such a fastening device.

  Further, as described above, of the four sides of the frame 16 that is square when viewed from the front, the upper force bone 11 forming the upper side that is one side, and the upper force In the lower force bone 12 which is vertically opposite to the bone 11 and is parallel to the upper force bone 11 and forms the lower side portion of the frame 16, the connecting portion by the countersunk screws 20 and 21, and the countersunk screw 22 , 23 are provided at the same distance A from the door end 10A, which is the end on the same side in the length direction of the upper side and the lower side, and the countersunk screw The connecting portion by 24 and 25 and the connecting portion by the countersunk screws 26 and 27 are provided at the same distance B from the end portion 10B on the same side in the length direction of the upper side portion and the lower side portion. Will be.

  And since these coupling | bond parts are by countersunk screws 20-27, these coupling | bond parts are the upper side part and lower side part of the above-mentioned frame 16 formed of the upper frame 11 and the lower frame 12. It is a point-like coupling portion that does not have a length in the length direction or has a short length.

  As shown in FIGS. 3 to 6, base portions 11A, 12A, 13A, and 14A of the upper strength bone 11, the lower strength bone 12, the left strength bone 13, the right strength bone 14, and a pair of flange portions 11B. , 11C, 12B, 12C, 13B, 13C, 14B, 14C, an adhesive 30 is applied, and by this adhesive 30, the upper radius 11, the lower radius 12, the left radius 13, the right force The bone 14 and the two surface materials 17 and 18 including the bent pieces 17A, 17B, 17C, 17D, 18A, 18B, 18C, and 18D are bonded to each other. It is performed over the entire length. Further, as shown in FIG. 6, the adhesive 30 is also applied to the pair of flange portions 15B and 15C of the three core bones 15 described above. For this reason, the flange portions 15B and 15C The two surface materials 17 and 18 are also bonded, and this bonding is also performed over the entire length of the middle bone 15.

  FIG. 5 shows a back plate member 19 for door closer disposed inside the door body 10 in order to attach the door closer 6 shown in FIG. 1 to the door body 10. The back plate member 19 for door closer made of steel is a channel-shaped member comprising a base portion 19A and a pair of flange portions 19B and 19C extending in the same direction from both ends of the base portion 19A. Two surface materials 17 and 18 are bonded to the flange portions 19B and 19C by an adhesive 30.

  FIG. 7 is a front sectional view showing a part of the internal structure of the door main body 10 shown in FIG. 2, and this FIG. 7 is operated by the lever type handle 4 and the locking device 5 shown in FIG. A lock device 31 is shown in which the mechanism is housed. The lock device 31 in which the above-described mechanism for moving the latch bolt 32 and the dead bolt 33 forward and backward shown in FIG. 8 by operating the lever type handle 4 and the locking device 5 is housed is composed of a base portion 34A and a pair of flanges. It is covered with a channel-shaped lock device back plate member 34 composed of a portion 34 B, and the pair of flange portions 34 B and the two surface materials 17 and 18 are bonded together by an adhesive 30.

  The flange portion 31A provided at the front end of the lock device 31 is attached to two upper and lower bracket members 35 fixed by welding or the like to the base portion 13A of the left lateral bone 13 by means of countersunk screws 36 and 37. The plate-shaped decorative member 38 that covers the front surface of the flange portion 31A and has an opening for allowing the latch bolt 32 and the dead bolt 33 to pass through is attached to the lock device 31 with countersunk screws 39 and 40. ing. As shown in FIG. 8, the bent pieces 17C and 18C of the two surface members 17 and 18 are provided with notches 17E and 18E for exposing the decorative member 38.

  As can be seen in this description, the countersunk screws 36, 37, 39, 40 are not used to connect the two surface members 17, 18 to the left-hand force frame 13. The left heel bone 13 is only bonded with the adhesive 30 alone.

  Then, the upper fulcrum 11, the lower fulcrum 12, the left fulcrum 13 and the right fulcrum 14 which are four skeletons forming the upper side, the lower side, the left side and the right side of the frame 16. Among them, the upper end surface 13D which is one end surface in the length direction of the left side rib 13 is the upper side which is the end surface on the outer side in the width direction of the upper rib 11 as shown in FIG. The lower end surface 13E that has reached the same position as or substantially the same position as the upper surface 11D of the strength bone 11 and that is the other end surface is a lower force that is the outer end surface of the lower strength bone 12 in the width direction. The bone 12 reaches the same position or substantially the same position as the lower surface 12D. Therefore, the frame 16 is constituted by a winning structure of the left side force frame 13 in the relationship between the upper side force frame 11, the lower side force frame 12 and the left side force frame 13.

  As can be seen from FIG. 2, the upper end surface that is one end surface in the length direction of the right strength bone 14 does not reach the upper surface 11 </ b> D of the upper strength bone 11, and the lower end surface that is the other end surface. The end surface reaches the same position as or substantially the same position as the lower surface 12D of the lower rib 12. Therefore, the frame 16 is constituted by the winning structure of the upper force bone 11 in the relationship between the upper force bone 11 and the right force bone 14, and the right force in the relationship between the lower force force bone 12 and the right force bone 14. It is composed of a winning structure of bones 14.

  As described above, in the front door 1 shown in FIG. 1, the end on the opposite side to the hinge 3 side is the end 1A on the door tip side, and the end on the hinge 3 side is the door. It is the end 1B on the bottom side. In FIG. 6, the upper fulcrum 11, the lower calcaneus 12, and the left calcaneus 13 that are four skeletons forming the upper side, the lower side, the left side, and the right side of the frame 16. Of the right-hand ribs 14, the left-hand rib 13 serving as the door-side rib, and the right-hand side facing the left-hand rib 13 in the left-right direction and parallel to the left-hand rib 13 The right strength bone 14 is a power bone on the door bottom side.

  6 shows a door-side blade 45 attached to the door body 10 among the members constituting the hinge 3 shown in FIG. A pin 46 to be inserted into a hole formed in the vertical direction is provided on the door frame-side slat attached to the door frame 2 shown in FIG. The door-side slats 45 are fixed to the base portion 14A of the right-hand rib 14 serving as the door-sill-side rib and the bent pieces 17D and 18D of the two surface materials 17 and 18 by countersunk screws 47 and 48. For this reason, these countersunk screws 47 and 48 used for fastening the door-side slats 45 are composed of the base portion 14A of the right-hand rib 14 and the two surface members 17 and 18. This is a fastener for connecting the bent pieces 17D and 18D.

  The countersunk screws 47 and 48 of the present embodiment are screwed into the screw holes of the back plate 49 arranged on the inner surface of the base portion 14A of the right-hand force frame 14, but are formed on the base portion 14A by burring. The back plate 49 may be omitted by forming a screw hole into which the countersunk screws 47 and 48 are screwed into the cylindrical projection.

  Next, since the prototype of the entrance door 1 was manufactured and the heating test about this prototype was implemented, this is demonstrated.

  The vertical dimension H shown in FIG. 2 of the prototype of the entrance door 1 is 2003 mm, and the left and right width dimensions are 871 mm. Further, both the distance A and the distance B shown in FIG. 2 are 50 mm. Therefore, the above-described connecting portion that connects the upper and lower force frames 11 and 12 and the two surface members 17 and 18 using the above-described countersunk screws 20 to 27 is the left-side force frame 13 and the right-side force. It is provided at a location close to the bone 14.

  In addition, the adhesive 30 used in the prototype is a two-component urethane adhesive manufactured by Aika Kogyo Co., Ltd., and consists of a main agent (trade name: WX-781) and a curing agent (trade name: WH-520). It is. The heat resistance temperature of the adhesive 30, that is, the temperature at which the adhesive force of the adhesive 30 disappears is about 300 ° C. The heat resistance temperature is the heat resistance temperature of the countersunk screws 20 to 27, and the above-mentioned dish. The temperature is lower than the heat resistance temperature of the screws 36, 37, 39, 40, 47, 48. Therefore, even if the countersunk screws 20-27, 36, 37, 39, 40, 47, 48 become higher than the heat resistance temperature of the adhesive 30, these countersunk screws 20-27, 36, 37, 39, 40, The bonding force is not lost by 47 and 48.

  Further, the surfaces of the two surface materials 17 and 18 forming the outer surface of the prototype are baked and the temperature of the baked coating is about 180 ° C., which is lower than the heat resistance temperature of the adhesive 30. It is.

  In the prototype described above, of the upper heel 11, the lower skeleton 12, the left skeleton 13, and the right skeleton 14 that form the upper side, the lower side, the left side, and the right side of the frame 16. The upper strength bone 11, the lower strength bone 12 and the right strength bone 14 are coupled to the two surface members 17, 18 by countersunk screws 20 to 27, 47, 48. The upper side portion, the lower side portion, and the right side portion of the frame 16 formed by the lower strength bone 12 and the right strength bone 14 do not have lengths in the length direction, or become short-point connecting portions. However, since all the strength bones 11 to 14 and the middle bone 15 and the two surface materials 17 and 18 are bonded by the adhesive 30, sufficient strength is ensured.

  Assuming that a fire broke out on the indoor side partitioned by this prototype, such a prototype was heated on the indoor surface material 18, and this heating caused the indoor temperature to be higher than the outdoor temperature. And the temperature of the entire prototype was raised to a temperature at which the adhesive strength of the adhesive 30 disappeared.

  In this heating test, as shown by the two-dot chain line in FIG. 8, the entire prototype was warped to the outdoor side, which is the thickness direction of the prototype. The ends of the bent pieces of the two surface materials were joined to each other by welding, and the welded portion was smaller than the conventional steel entrance door that is continuous in the length direction of the skeleton.

  The reason why the warpage is smaller than that of the conventional steel entrance door is that the upper skeleton 11 and the lower skeleton 12 are attached to the two surface members 17 and 18 by countersunk screws 20 to 27. The joined portions by these countersunk screws 20 to 27 do not have the length in the length direction of the upper side portion and the lower side portion of the frame 16 formed by the upper strength bone 11 and the lower strength bone 12 or are long. Since the two surface materials 17 and 18 are connected to each other via the upper and lower ribs 11 and 12 in such a connecting portion. Although the vertical deformation of the surface material 18 on the side is restrained by the surface material 17 on the low temperature side, the adhesive force of the adhesive 30 has disappeared at the location where it is not joined by the countersunk screws 20 to 27, and 2 The surface members 17 and 18 are connected to each other via the upper and lower ribs 11 and 12. Since not, rather that such constraint occurs, point restraint does not occur, because provided over a long distance in the longitudinal direction of the upper portion and the lower portion.

  For this reason, according to this embodiment, even if a temperature difference occurs between both sides in the thickness direction of the front door 1 due to the occurrence of a fire or the like, it is possible to suppress the occurrence of a large warp in the thickness direction.

  Moreover, the coupling | bond part by the countersunk screws 20-27 is an upper side which is one side among the upper side part of the frame 16 which is a square in front view, a lower side part, a left side part, and a right side part, and this upper side 2 and the lower side portion that is parallel to the upper side portion, and the connecting portion by the countersunk screws 20 to 27 is as described in the distance A and the distance B in FIG. Since the upper edge and the lower edge are provided at the same distance from the end on the same side, the above-mentioned restriction can be provided at the same position in the length direction of the upper edge and the lower edge. Thereby, it is possible to further suppress the occurrence of a large warp in the thickness direction.

  Moreover, since the front door 1 has a vertically long vertical dimension H larger than the left and right width dimension W, the upper side and the lower side are shorter than the left side and the right side. In addition, since the above-described warpage occurs largely along the left side and the right side, which are longer than the upper side and the lower side, the connecting portion by the countersunk screws 20 to 27 is provided on the upper side and the lower side. As a whole door 1, it is possible to suppress a large warp from occurring in the thickness direction.

  Further, the right-hand force frame 14 and the two surface materials 17 and 18 are connected by a connecting portion by screws 47 and 48 shown in FIG. It is a point-like joint portion that does not have a length in the length direction or is short in length, and as described above, the left lateral bone 13 and the two surface materials 17 and 18 are joint portions by countersunk screws. Since the adhesive force of the adhesive 30 that has not been bonded together and bonded the left lateral bone 13 and the two surface materials 17 and 18 is extinguished by heat such as fire, the upper side of the entrance door 1 and The occurrence of warpage along the lower side can also be suppressed.

  Further, the adhesive force of the adhesive 30 that has adhered the left lateral bone 13 and the two surface materials 17 and 18 disappears due to heat of fire or the like, but in this embodiment, it is shown in FIG. As described above, the upper end surface 13D and the lower end surface 13E, which are both end surfaces in the length direction of the left side rib 13, are the same position as or substantially the same position as the upper surface 11D of the upper rib 11 and the lower surface 12D of the lower rib 12. In addition, since the two surface members 17 and 18 are provided with bent pieces 17C and 18C sandwiching the left-side force frame 13 together with the upper-side force frame 11 and the lower-side force frame 12, adhesion is achieved. In the event of a fire that causes the adhesive force of the agent 30 to disappear, it is possible to prevent such a situation that the left lateral bone 13 falls within the entrance door 1.

  Further, the right-hand force frame 14 serving as a door-side-side force frame is disposed in parallel with the left-hand force frame 13 so as to face the left-side force structure 13 serving as a door-end-side force structure in the left-right direction. The right-hand force frame 14 and the bent pieces 17D and 18D formed on the two surface members 17 and 18 to cover the outer surface in the width direction of the right-hand force frame 14 are the door side of the hinge 3. Since these are connected by countersunk screws 47 and 48 which are fastening devices for fixing the slats 45 to the right-hand rib 14, the right-hand rib 14 and the two surface members 17 and 18 are connected to each other. Even if the adhesive force of the adhesive 30 that has been bonded disappears due to heat such as a fire, it is possible to prevent the right-side force frame 14 from falling inside the entrance door 1 when a fire occurs.

  Further, even if the surface of the two surface materials 17 and 18 forming the outer surface of the entrance door 1 is baked and painted, the heat resistance temperature of the adhesive 30 is higher than the temperature of the baked coating. 1, each of the bones 11 to 14 and the middle bone 15 and the two surface materials 17 and 18 were bonded to each other with an adhesive 30, and then the surfaces of the two surface materials 17 and 18 were baked and painted. Sometimes, the adhesive force of the adhesive 30 does not disappear, and a sufficient adhesion state between the strength bones 11 to 14 and the middle bone 15 and the surface materials 17 and 18 by the adhesive 30 can be maintained.

  The temperature at which the adhesive force of the adhesive 30 of the prototype disappears due to heat, that is, the heat resistant temperature of the adhesive 30 used in the prototype was about 300 ° C. The heat resistance temperature of the countersunk screws 20 to 27, 36, 37, 39, 40, 47 and 48, that is, the countersunk screws 20 to 27, 36, 37, If the temperature is lower than the temperature at which the bonding force by 39, 40, 47, 48 does not disappear, for example, it may be 250 ° C. or 200 ° C., and further may be 350 ° C.

  INDUSTRIAL APPLICATION This invention can be utilized for the entrance door which may receive heat, such as a fire, the doorway for warehouses, and also the sliding door of a sliding door apparatus.

DESCRIPTION OF SYMBOLS 1 Steel door which is a metal door 1A Door end side end 1B Door bottom side end 3 Hinge 10 Door body 11 Upper rib 11D Upper end surface 12D Lower end rib 12D Outer end surface Lower surface 13 Left-hand ribs 13D, 13E Upper end surface and lower-end surface which are end surfaces in the length direction 14 Right-hand ribs 16 Frame 17, 18 Surface material 17A, 17B, 17C, 17D, 18A, 18B, 18C, 18D Bending piece 20- 27 A countersunk screw that forms a joint for joining the hard bone and the surface material and serves as a fastening tool 30 Adhesive 45 Door blade
47, 48 Countersunk screw, which is a fastening tool for fastening the door-side slats to the heel of the door-end

Claims (9)

The upper side, the lower side, the left side, and the right side of the frame that is square when viewed from the front are formed by four metal ribs, and two metal surface materials are attached to the front and back of the frame. In the metal door formed by
Among the upper side, the lower side, the left side, and the right side, at least one of the side members is bonded to the skeleton forming the side by a connecting portion. In addition, the coupling portion is a dot-shaped coupling portion that does not have a length in the length direction of the one side portion or is short in length.   2. The metal door according to claim 1, wherein the one of the upper side portion, the lower side portion, the left side portion, and the right side portion is opposed to the one side portion. In the opposite side portion parallel to the side portion, the two surface materials are joined to the skeleton forming the opposite side portion by a joint portion, and the joint portion is also opposed to the opposite side portion. A metal door, characterized in that it is a point-like connecting portion that does not have a length in the length direction of the side portion or has a short length.   4. The metal door according to claim 3, wherein the connecting portion of the one side portion and the connecting portion of the opposite side portion are the same distance from the end portions on the same side in the length direction of these side portions. Or the metal door characterized by being provided in the substantially same distance.   The metal door according to claim 2 or 3, wherein the one side portion and the opposite side portion are side portions shorter in length than two side portions excluding these side portions. Features a metal door.   5. The metal door according to claim 4, wherein the one side and the opposite side are the upper side and the lower side, and the two sides are the left side and the right side. Metal door characterized by being.   The metal door according to any one of claims 1 to 5, wherein the four strength bones and the two surface materials are bonded with an adhesive, and the connecting portion has a higher temperature than the adhesive. A metal door characterized in that the two surface materials are joined to the hard bone by a fastening device having heat resistance against the temperature of the metal.   7. The metal door according to claim 6, wherein surfaces of the two surface materials are baked and the heat-resistant temperature of the adhesive is higher than the temperature of the baked coating. . 6. The metal door according to claim 2, wherein one of the upper side, the lower side, the left side, and the right side, excluding the one side and the opposite side. One bristle that forms the side of the sheet and the two surface materials are bonded by an adhesive that is not bonded by the bonding portion and whose heat-resistant temperature is lower than the bonding portion. Has been
Both end faces in the length direction of the one rib are at the same position or substantially the same as the outer end faces in the width direction of the two ribs forming the one side and the opposite side. Has reached the position,
The two surface materials are provided with a bent piece sandwiching the one strength bone together with the two strength bones forming the one side portion and the opposite side portion. Characteristic metal door. In the metal door according to claim 8, it is a metal door that opens and closes around a hinge,
The one sword is a door-side sword, and is disposed in opposition to the door-side sword in the left-right direction, and is parallel to the door-side sword. The butt-side skeleton and the bent piece formed on the two surface materials to cover the outer surface of the door-side skeleton in the width direction are the door-side blades of the hinge. A metal door characterized by being joined by a fastening device for fastening to a power bone on the door end side.

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