JP2010001623A - Frameless fire-preventive door for building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To fix an insertion piece to a gripping groove in an anti-coming-off state by a simple structure. <P>SOLUTION: This frameless fire-preventive door is equipped with a first surface plate 1 which is provided with the insertion piece 3 in parallel with a side edge, the insertion piece made by curving the surface plate and a second surface plate 2 which is provided with the gripping groove 4 for the insertion of the insertion piece 3 the gripping groove made by curving the surface plate in a U-shape. In the insertion piece 3, a first folded laminated piece 31 is provided by bending a leading edge in such a manner as to fold it back in the direction of curving the gripping groove 4 in the U-shape, and one side is formed as a stepped surface 32. In the griping groove 4 of the second surface plate 2, a second folded laminated piece 41 is provided by bending a leading edge in such a manner as to fold it back to the inside of the groove, and one side is formed as a stepped surface 42. In the frameless fire-preventive door, the first folded laminated piece 31 provided in the insertion piece 3 is guided inward with respect to the second folded laminated piece 41 of the gripping groove 4; the stepped surface 32 of the first folded laminated piece 31 and the stepped surface 42 of the second folded laminated piece 41 are put into the state of being locked to each other; and leading end surfaces of them abut on each other, so that the first surface plate 1 can be fixed to the second surface plate 2 in an anti-coming-off manner. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a door for a building, and more particularly to a frameless fire door that omits a reinforcing frame that is framed in a rectangular shape. However, in the present invention, the “frameless fire door” is not specified as all frames that are rectangularly framed, that is, a door that omits only the vertical frame and the horizontal frame. Used in a broad sense including

  A horizontal cross section of a current general door is shown in FIG. In this door, first and second surface plates 92 are fixed to both surfaces of a frame 91 in which a vertical frame and a horizontal frame are squarely framed. In this door, a rectangular frame 91 is formed by a C channel 93, and a surface plate 92 is fixed to both surfaces of the frame 91. The first and second surface plates 92 are fixed to the frame 91 so that the side edges are bent inwardly in a U-shape and come into contact with each other. The door shown in this figure has been fully reduced in manufacturing method and structure so far, and the cost has been reduced to a state close to the limit. For this reason, it is extremely difficult to further reduce the cost. This is because a heavy frame is assembled into a square shape, which increases raw material costs and assembly processing costs. For this reason, the door shown in FIG. 1 cannot be mass-produced at a lower cost.

  Since the conventional door shown in FIG. 1 incorporates a thick metal C-channel 93 along the periphery, the overall weight is considerably increased. For example, the total weight of a door in which a surface plate, which is a 0.6 mm metal plate, is fixed on both sides of the C channel is considerably heavy at about 40 kg. In order to reduce the weight, if the C channel is made thin, there is a disadvantage that the strength is remarkably lowered. This is because the C channel is used as a door reinforcement. Heavy doors require strong strength in the building attachment. This is because when the door is opened and closed, a strong impact is given to the mounting portion. For this reason, there is a disadvantage that not only the cost of the door is increased, but also the cost of the mounting portion is increased.

  Furthermore, the door having the structure shown in FIG. 1 is required to have extremely high accuracy for processing the surface plate. This is because an error in processing accuracy becomes a difference in clearance after assembly, which degrades the quality of the door. For this reason, the door of this structure has the fault that both parts cost and processing cost become high, and manufacturing cost becomes quite high.

The present inventor has developed a frameless door having the structure shown in FIG. 2 in order to eliminate this drawback. (Patent Document 1)
This frameless door has the following structure.
(A) A first surface plate 81, a second surface plate 82, and a core member 85 disposed in a hollow portion between the pair of surface plates.
(B) The first surface plate 81 is bent in a U shape on both sides to constitute both sides of a frameless door having a predetermined thickness, and an opening is formed between both sides of the door. .
(C) The first surface plate 81 is provided with connecting portions 84 that connect both side edges of the second surface plate 82 at the tip edge of the bent portion 83.
(D) The second surface plate 82 is fixed to the first surface plate 81, and the first surface plate 81 and the second surface plate 82 are configured to form a closed frameless door. The surface plate 82 has an outer shape that can be fixed to the opening of the first surface plate 81.
(E) Both side edges of the second surface plate 82 are connected to the connecting portion 84 of the first surface plate 81 to form a hollow box-shaped frameless door.
JP-A-7-305573 JP 2007-315046 A

  The above frameless door has a drawback that it is difficult to make both sides of the door have the same strength in a balanced manner. The present inventor has developed a frameless fire door shown in the sectional view of FIG. 3 in order to solve this drawback. This flameless fire door has a first surface plate 71 fixed to the first surface of the door and a second surface fixed to the second surface which is the surface opposite to the first surface of the door. The surface plate 72 is provided. The first surface plate 71 and the second surface plate 72 are metal plates. The first surface plate 71 has an insertion piece 73 bent inward of the door along the side edge, and the second surface plate 72 has a sandwiching groove 74 into which the insertion piece 73 is inserted. A bent metal plate is provided. The first surface plate 71 and the second surface plate 72 are connected at the side edges on both sides by inserting the insertion piece 73 into the sandwiching groove 74.

  The frameless fire door of FIG. 3 can be efficiently manufactured because it can be assembled by inserting the insertion piece 73 into the clamping groove 74 and fixing the first surface plate 71 to the second surface plate 72. However, it is difficult for the frameless fire door having this structure to firmly connect the first surface plate 71 and the second surface plate 72. As described in Patent Document 2, this drawback can be reduced by a structure in which the insertion piece is elastically sandwiched between the sandwiching grooves. However, even with this structure, the first face plate and the second face plate cannot be fixed with sufficient strength as a frameless fire door. The reason is that when one side of the fire door is heated to a high temperature due to a fire or the like and the door is thermally distorted, a strong pulling force acts on the insertion piece and the door is pulled out from the clamping groove. The pulling force of the insertion piece can be reduced by using a structure in which the insertion groove is strong and the insertion piece is elastically clamped, for example, a thick and hard metal plate is used for the second surface plate. However, this structure requires the use of a thick second surface plate or a high-quality metal plate, which is heavy and increases the component cost, and the insertion piece cannot be smoothly inserted into the clamping groove. There is a drawback that it takes time to manufacture.

The present invention has been developed for the purpose of solving this drawback. An important object of the present invention is to provide a frameless fire door which can be fixed with an extremely simple structure in a state where the insertion piece is not pulled out into the clamping groove.
Another important object of the present invention is to provide a frameless fire door that can be assembled easily and easily by inserting an insertion piece into a clamping groove simply and easily.
Furthermore, another important object of the present invention is to provide a flameless fire door capable of fixing an insertion piece so as not to be pulled out into a sandwiching groove even in a state heated by a fire or the like.

Means and effects for solving the problems

  The frameless fire door of the present invention is a frameless fire door for a building, and includes a first surface plate 1 made of a metal plate fixed to the first surface of the door, and a first surface of the door. And a second surface plate 2 made of a metal plate fixed to the second surface which is the opposite surface. The first surface plate 1 is provided by bending the insertion piece 3 in parallel with the side edge thereof, and the second surface plate 2 is formed by bending the sandwiching groove 4 for inserting the insertion piece 3 into a U shape. The first surface plate 1 and the second surface plate 2 are fixed by inserting the insertion piece 3 into the sandwiching groove 4. Further, the insertion piece 3 is bent so that the front end edge is folded back in the U-bending direction of the sandwiching groove 4 with a predetermined width, and a first folded laminated piece 31 is provided along the front end edge to make one side a stepped surface. 32, the metal plate constituting the sandwiching groove 4 of the second surface plate 2 is folded so that the front edge of the sandwiching groove 4 is folded back inside the groove with a predetermined width. A second folded laminated piece 41 that is bent to narrow the opening of the groove is provided, and one side is used as a stepped surface 42. The frameless fire door guides the first folded laminated piece 31 provided in the insertion piece 3 to the inside rather than the second folded laminated piece 41 of the sandwiching groove 4, so that the first folded laminated piece 31 The stepped surface 32 and the stepped surface 42 of the second folded laminated piece 41 are engaged with each other, the first folded laminated piece 31 and the tip surface of the second folded laminated piece 41 are brought into contact with each other, The first surface plate 1 is fixed to the second surface plate 2 so as not to come off.

  This frameless fire door has an extremely simple structure and can be firmly fixed in a state where the insertion piece does not come out into the clamping groove. This is because the inserted piece and the folded laminated piece provided in the sandwiching groove are caught by each other and the insertion piece is prevented from coming out of the sandwiching groove. In particular, this structure does not simply prevent the insertion piece from being clamped by the clamping groove, but provides a stepped surface by providing folded laminate pieces on both surfaces of the insertion piece and the clamping groove. The surfaces are locked to each other, and are prevented from coming off by a structure in which the front end surfaces of the folded laminated pieces touch each other. In this structure, when a pulling force acts on the insertion piece, the leading end surface of the first folded laminated piece provided in the inserting piece hits the distal end face of the second folded laminated piece provided in the sandwiching groove to prevent the drawing. Is done. In the structure that prevents the pulling out in this state, the inserted piece is not pulled out from the clamping groove unless the folded laminated piece that is folded so as to be folded back at a predetermined width is deformed. When a pulling force acts on the insertion piece, the pulling force acts on the folded laminated piece in a direction parallel to both surfaces thereof. The pulling force acting in this direction does not have the effect of restoring the folded laminated piece folded back so as to be flat, but acts to deform the linear folded laminated piece into a square shape. The folded laminated piece made of a plate is extremely strong against a force in this direction, and is not deformed by a strong pulling force acting on the insertion piece, and reliably prevents the insertion piece from being pulled out of the clamping groove.

  Further, the above frameless fire door has a feature that it can be assembled easily and easily by inserting the insertion piece into the clamping groove simply and easily. This is because the insertion piece is not firmly clamped by the sandwiching groove to prevent it from coming off, but the one side of the insertion piece and the stepped surface provided on the inner surface of the sandwiching groove are in a locked state to prevent pulling out. . In this structure, it is not necessary that the insertion groove strongly clamps the insertion piece to prevent the extraction. For this reason, when inserting an insertion piece into a clamping groove, a clamping groove is elastically deformed and it can insert smoothly.

  Furthermore, the frameless fire door described above is provided with a folded laminated piece by folding the insertion piece and the leading edge of the sandwiching groove with a predetermined width, so that the insertion piece and the leading end of the sandwiching groove are provided. There is also a feature that can be reinforced with a folded folded piece. In this way, the insertion piece and the sandwiching groove reinforced by the folded laminated piece can be connected to each other by inserting the insertion piece into the sandwiching groove while being held in a predetermined shape. It is possible to reliably prevent the inserted piece from being pulled out of the clamping groove over a period of time.

  Furthermore, the frameless fire door described above has a feature that even if one side is heated by a fire or the like and the door is in a state of thermal distortion, the insertion piece can be fixed so as not to come out into the clamping groove. This is especially important for fire doors. This is because when the surface plate is separated in a fire, the flame penetrates the door and the fireproof property is deteriorated.

  Furthermore, in the frameless fire door for a building of claim 2 of the present invention, the first surface plate 1 and the second surface plate 2 are iron plates having a thickness of 0.9 mm to 1.8 mm.

Furthermore, the frameless fire door for a building according to claim 3 of the present invention includes the first folded laminated piece 31 and the first folded piece 31 arranged to face each other in a state where the insertion piece 3 is inserted into the sandwiching groove 4. The gap 50 at the front end surface of the folded folded piece 41 is set to 0 mm to 1 mm.
In this frameless fire door, the gap between the tip of the inserted piece and the folded laminated piece of the sandwiching groove approaching each other is narrowed, so that the first surface plate is securely fixed to the fixed position of the second surface plate. it can.

Furthermore, the frameless fire door for a building according to claim 4 of the present invention includes a U-shaped laminated portion 6 in which the first surface plate 1 is folded so as to be folded inward along the side edge. The inner laminated piece 7 laminated on the inner side of the curved laminated portion 6 is bent at a right angle inside the door to provide the insertion piece 3.
The frameless fire door having this structure is characterized in that the side edge of the surface plate is reinforced by the U-curved layered portion, and the insertion piece can be inserted into the clamping groove and securely fixed.

Furthermore, the frameless fire door for a building according to claim 5 of the present invention includes a U-curved laminated portion 6 in which the second surface plate 2 is folded so as to be folded inward along the side edge. An inner laminated piece 7 laminated inside the U-curved laminated portion 6 is bent at a right angle inside the door to provide a side plate 9, and a clamping groove 4 is provided at the tip of the side plate 9. Claim 1.
The frameless fire door having this structure is provided with a U-curved laminated portion that reinforces the U-curved laminated portion with a side plate while reinforcing the side edge side of the surface plate, and a sandwiching groove provided at the tip of the side plate. The insert piece is inserted into the door, and the side edge of the door is reinforced by the side plate, the clamping groove, and the insert piece, so that a strong structure can be obtained.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment shown below exemplifies a frameless fire door for a building for embodying the technical idea of the present invention, and the present invention specifies the frameless fire door as the following embodiment. do not do.

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  4 to 7 show a frameless fire door for a building according to the first embodiment of the present invention, FIG. 8 shows a frameless fire door according to the second embodiment of the present invention, and FIG. 3 shows a frameless fire door according to a third embodiment of the present invention. The frameless fire door shown in these figures includes a first surface plate 1 fixed to a first surface (the lower surface in FIGS. 5 and 8 and the upper surface in FIG. 9), and the first surface of the door. The second surface plate 2 fixed to the second surface (the upper surface in FIGS. 5 and 8 and the lower surface in FIG. 9), the first surface plate 1 and the second surface plate 2, which are opposite surfaces. The upper frame 11 and the lower frame 12 are fixed to the upper and lower edges.

  The first surface plate 1 and the second surface plate 2 are metal plates. The metal plate of the surface plate has a thickness of 1 mm, for example. However, the thickness of the metal plate used for the surface plate can be, for example, 0.5 mm to 1.8 mm, preferably 0.8 mm to 1.5 mm, and more preferably 1 mm to 1.5 mm. The first surface plate 1 and the second surface plate 2 are metal plates made of iron or an iron alloy. The metal plate is finely surface-treated by printing the surface or adhering a decorative sheet.

  The first surface plate 1 is bent inward of the door in parallel with the side edges on both sides to provide an insertion piece 3. The second surface plate 2 is provided with a sandwiching groove 4 for inserting the insertion piece 3, and the first surface plate 1 and the second surface plate 2 are inserted by inserting the insertion piece 3 into the sandwiching groove 4. Are connected at the side edges on both sides. The first surface plate 1 and the second surface plate 2 are quadrangles that cover the entire outer surface of the door, and both side edges are bent.

  The frameless fire door shown in FIGS. 5 and 8 is provided with an insertion piece 3 at a position away from the side edges on both sides of the first surface plate 1 in the center. These first surface plates 1 are provided with U-curved laminated portions 6 that are bent so as to be folded inward along both side edges, and are further laminated inside the U-curved layer portions 6. The tip of the inner laminated piece 7 is bent at right angles to the inside of the door to form the insertion piece 3. The frameless fire door of FIG. 9 is formed as an insertion piece 3 by bending both side edges of the first surface plate 1 inward at a right angle.

  The frameless fire door shown in FIG. 5 has the leading edge of the U-curved laminate 6 provided on both side edges of the first face plate 1 on the same plane as the side of the door, and the leading end of the U-curved laminated portion 6 The structure does not protrude from the side. The frameless fire door with this structure is bilaterally symmetric and has the same shape on the front and back.

  The frameless fire door shown in FIG. 8 is provided with a security plate 5 including a U-curved laminated portion 6 on a first side edge which is one side edge (right side edge in the figure) of the first surface plate 1. Yes. In this frameless fire door, the width of the U-curved laminated portion 6 is widened, and the tip portion of the U-curved laminated portion 6 is projected from the side surface of the door to form a security plate 5. As described above, the frameless fire door having the U-curved laminated portion 6 provided on the first side edge as the security plate 5 can close the gap formed between the door frame and the door with the security plate 5. A door with excellent crime prevention can be realized. In this frameless fire door, the U-curved laminated portion 6 provided on the first side edge of the first surface plate 1 is used as the crime prevention eyeplate 5, but the U-curved laminated portion 6 provided on the second side edge. Does not protrude from the side of the door and does not serve as a security screen. In other words, the U-curved laminated portion 6 on the second side edge is narrower than the U-curved laminated portion 6 provided on the first side edge serving as the crime prevention eye plate 5 so as not to protrude from the side surface of the door. is doing.

  The insertion piece 3 is bent so that the front end edge is folded back at a predetermined width, and the first folded laminated piece 31 is provided along the front end edge. As shown in FIGS. 5 and 7 to 9, the insertion piece 3 is formed by thickening a portion where the first folded laminated piece 31 is provided and thinning a portion where the first folded laminated piece 31 is not provided. The surface of one side of the folded laminated piece 31 is a stepped surface 32. The insertion piece 3 in the figure has a stepped surface 32 along the center of the insertion piece 3 with the width (W1) of the first folded laminated piece 31 being about 50% of the total width (W) of the insertion piece 3. Yes. The width (W1) of the folded laminated piece can be 20% to 80% of the total width (W) of the inserted piece. If the width (W1) of the folded laminated piece is too narrow or too wide, it cannot be fixed to the sandwiching groove so that the inserted piece cannot be pulled out. Preferably, the width (W1) of the folded laminated piece is set to 30% to 70% of the entire width (W) of the inserted piece in order to fix the inserted piece most firmly so that the inserted piece does not come out into the sandwiching groove. .

  Further, in the illustrated frameless fire door, the total width (W) of the insertion piece 3 is about 50% of the door thickness (T). The frameless fire door can securely fix the first surface plate 1 and the second surface plate 2 by inserting the insertion piece 3 into the clamping groove 4. However, the total width (W) of the insertion piece may be 20% to 80% of the thickness (T) of the door. If the entire width of the insertion piece is narrowed, the width inserted into the sandwiching groove becomes narrow, and it becomes difficult to firmly fix the insertion piece to the sandwiching groove. On the contrary, if the width of the insertion piece is widened, the width of the metal plate to be processed into the first surface plate is widened, the material cost is high, and the door is heavy. Accordingly, the total width (W) of the insertion piece is set to an optimum value within the above-mentioned range in consideration of the connection strength required for the first surface plate and the second surface plate, the material cost, and the weight of the door. Designed, preferably set at 30% to 70% of the door thickness (T).

  The second surface plate 2 has a sandwiching groove 4 for inserting and connecting insertion pieces 3 provided along both sides of the first surface plate 1 on the first surface side connecting the first surface plate 1. Is provided. In the second surface plate 2, the metal plate is bent at both side edge portions, and a sandwiching groove 4 is provided at the insertion position of the insertion piece 3 of the first surface plate 1.

  The frameless fire door of FIGS. 5 and 8 is provided with a side plate 9 of the door by bending the second face plate 2 inwardly at a first side edge and a second side edge at a right angle. . The width of the side plate 9 is the thickness of the door. Further, a folded piece 10 is provided to bend the tip edge of the side plate 9 inward at a right angle so as to make surface contact with the inner surface of the first surface plate 1. The folded piece 10 has a clamping groove 4 provided at the tip of the folded piece 10 having a width that allows the insertion piece 3 of the first surface plate 1 to be inserted. The tip of the folded piece 10 is further bent inward at a right angle, and is bent into a groove shape to provide a sandwiching groove 4. The clamping groove 4 is bent to a width that elastically clamps the inserted piece 3 to be inserted.

  The frameless fire door shown in FIG. 9 has a second face plate 2 bent at a second side edge at a right angle inside to provide a side plate 9 of the door and an inner side along the first side edge. Folded so as to be folded back to provide a U-curved laminated portion 6, and the tip of the inner laminated piece 7 laminated on the inner side of this U-curved layer portion 6 is bent at a right angle to the inside of the door. A plate 9 is provided. The second surface plate 2 is provided with a sandwiching groove 4 on the inner side of the front end portion of the side plate 9 without bending the front end edge of the side plate 9 inward and providing a folded piece. The second surface plate 2 is bent so that the front end edge of the side plate 9 is folded back, and is further bent into a groove shape so as to be folded back at the bottom of the sandwiching groove 4 to provide the sandwiching groove 4. . In the sandwiching groove 4, the insertion direction of the insertion piece 3 is parallel to the side plate 9. This clamping groove 4 is also bent to a width that elastically clamps the inserted piece 3 to be inserted. Further, in the frameless fire door shown in FIG. 9, the U-curved laminated portion 6 provided on the first side edge is projected from the side surface of the door to form a security plate 5. Since this frameless fire door can also close the gap formed between the door frame with the crime prevention eye plate 5, it is possible to realize a door with excellent crime prevention.

  The metal plate constituting the sandwiching groove 4 of the second surface plate 2 is bent so that the front edge of the sandwiching groove 4 is U-bent and folded back into the groove with a predetermined width. Thus, a second folded laminated piece 41 laminated inside the sandwiching groove 4 is provided. As shown in FIGS. 5 and 7 to 9, the second folded laminated piece 41 is provided in the opening of the groove, the width of the sandwiching groove 4 is reduced, and one side of the sandwiching groove 4 is arranged. The inner surface is a stepped surface 42. The sandwiching groove 4 has a narrow inner width (H2) of a portion where the second folded laminated piece 41 is provided, and a wider inner width (H1) of a portion where the second folded laminated piece 41 is not provided. A step surface 42 is provided. In the sandwiching groove 4, the first folded laminated piece 31 provided in the insertion piece 3 is guided to a portion having a wide inner width. Therefore, the width (W2) of the second folded laminated piece 41 is the width of the portion of the insertion piece 3 where the first folded laminated piece 31 is not provided. In the illustrated frameless fire door, the width (W1) of the first folded laminated piece 31 is about 50% of the total width (W) of the insertion piece 3, so the width (W2) of the second folded laminated piece 41 is as follows. Also, the second folded laminated piece 41 is disposed in a portion where the first folded laminated piece 31 is not provided, so that the depth (D) of the sandwiching groove 4 is about 50%. In this frameless fire door, the gap 50 between the front end surfaces of the first folded laminated piece 31 and the second folded laminated piece 41 arranged to face each other in a state where the inserted piece 3 is inserted into the sandwiching groove 4. Becomes almost 0, and the front end surfaces of the first folded laminated piece 31 and the second folded laminated piece 41 come into contact with each other. In this frameless fire door, the insertion piece 3 is inserted into the sandwiching groove 4 in a state where the front end surfaces of the first folded laminated piece 31 and the second folded laminated piece 41 are in contact with each other. 1 is fixed to the second surface plate 2 in a state where it does not come off at all. However, the clearance 50 between the front end surfaces of the first folded laminated piece 31 and the second folded laminated piece 41 is, for example, 0 mm to 1 mm, preferably 0 to 0.5 mm, and more preferably 0 to 0.3 mm. You can also. The gap 50 between the first folded laminated piece 31 and the second folded laminated piece 41 can be narrowed so that the first surface plate 1 can be connected so as not to come out of the second surface plate 2. Then, high processing accuracy is required. That is, if the processing accuracy is low, the second folded laminated piece 41 cannot be inserted into the region where the first folded laminated piece 31 is not present, and the first folded laminated piece 31 and the second folded laminated piece 41 are at the leading ends. This is because they overlap each other and cannot be prevented from coming off in the locked state.

  In the frameless fire door described above, the first folded laminated piece 31 provided in the insertion piece 3 is inserted inside the second folded laminated piece 41 of the sandwiching groove 4 so that the first folded laminated piece is inserted. The step surface 31 of 31 and the step surface 42 of the second folded laminated piece 41 are engaged with each other so as not to come out of the first surface plate 1 and the second surface plate 2. That is, by arranging the first folded laminated piece 31 and the second folded laminated piece 41 on the same surface, the front end surfaces of the first folded laminated piece 31 and the second folded laminated piece 41 are brought into contact with each other. The first surface plate 1 is fixed so as not to come out of the second surface plate 2.

  Further, as shown in the cross-sectional view of FIG. 6, the frameless fire door has an upper frame 11 along the upper edges of the first surface plate 1 and the second surface plate 2, and a lower frame 12 along the lower edges. Built in. The first surface plate 1 and the second surface plate 2 have an upper edge fixed to the upper frame 11 and a lower edge fixed to the lower frame 12. The upper frame 11 and the lower frame 12 are channel members obtained by bending a metal plate thicker than the surface plate into a groove shape. The upper frame 11 of the channel material is fixed between the first surface plate 1 and the second surface plate 2 with the opening of the groove facing upward and the lower frame 12 with the opening of the groove facing downward. Further, the frameless fire door shown in these drawings is formed by laminating the upper edge and the lower edge of the first surface plate 1 and the second surface plate 2 at right angles to each other and laminating the laminated portion 13. Are connected. The laminated portions 13 of the face plates are joined by spot welding, connecting with rivets, or also by bonding.

  Further, the frameless fire door shown in FIGS. 5, 8, and 9 incorporates a fixing base 16 at a position where the hinge 14 is fixed on the second side edge side. The fixed base 16 is a channel material 18 formed by bending a metal material such as iron thicker than the surface plate into a U shape. The channel member 18 has side walls 18B on both sides of a fixed plate 18A having a width equal to the inner width of the door, and has a U-shaped cross section.

  As shown in the figure, the fixing base 16 for fixing the hinge 14 is fixed by contacting the fixing plate 18A with the inner surface of the side plate 9 of the door. The fixing base 16 is fixed by being adhered to the surface plate or fixed by a set screw 19. The hinge 14 is fixed by screwing a set screw 19 into a fixing plate 18 </ b> A of the channel material 18 that is the fixing base 16. The frameless fire door shown in FIG. 4 has fixed bases 16 built in three places in the vertical direction, and three hinges 14 are fixed.

  Further, the frameless fire door shown in FIG. 4 includes a fixing base 17 at a position where the door lock (not shown) is fixed on the first side edge side. Although not shown, the fixing base 17 is formed by bending a metal material such as iron thicker than the surface plate into a U shape, and is fixed between the first surface plate 1 and the second surface plate 2. Thus, the door lock disposed on the first side edge side is fixed at a fixed position.

The above frameless fire door is assembled in the following steps.
(1) The upper frame 11, the lower frame 12, and the fixing bases 16 and 17 are bonded and fixed to the inner surface of the second surface plate 2.
(2) The first surface plate 1 is connected to the second surface plate 2, and the inner surface of the first surface plate 1 is bonded to the upper frame 11, the lower frame 12, and the fixing bases 16 and 17. The first surface plate 1 is connected to the second surface plate 2 by inserting the insertion piece 3 into the sandwiching groove 4. At this time, the insertion piece 3 and the sandwiching groove 4 are bonded and joined.
(3) The 1st surface board 1 and the 2nd surface board 2 adhere | attach and couple | bond the laminated part 13 of an upper edge and a lower edge.
(4) The hinge 14 is fixed to the fixed base 16 built in the second side edge side, and the door lock is fixed to the fixed base 17 built in the first side edge side.

It is a horizontal sectional view of a conventional general door. It is an exploded sectional view of the conventional frameless door. It is sectional drawing of the flameless fire door which this inventor developed previously. It is a front view of the flameless fire door for buildings concerning the 1st example of the present invention. It is a partially expanded horizontal sectional view of the flameless fire door for buildings shown in FIG. It is a vertical sectional view of the frameless fire door for buildings shown in FIG. It is a principal part expansion disassembled sectional view of the flameless fire door shown in FIG. It is a partial expanded horizontal sectional view of the flameless fire door for buildings concerning the 2nd example of the present invention. It is a partial expanded horizontal sectional view of the flameless fire door for buildings concerning the 3rd example of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... 1st surface board 2 ... 2nd surface board 3 ... Insertion piece 4 ... Clamping groove 5 ... Eye plate for crime prevention 6 ... U-bending laminated part 7 ... Inner lamination piece 9 ... Side plate 10 ... Folding piece 11 ... Upper frame 12 ... Lower frame 13 ... Laminated portion 14 ... Hinge 16 ... Fixed base 17 ... Fixed base 18 ... Channel material 18A ... Fixed plate
18B ... Side wall 19 ... Set screw 31 ... First folded laminated piece 32 ... Stepped surface 41 ... Second folded laminated piece 42 ... Stepped surface 50 ... Gap 71 ... First surface plate 72 ... Second surface plate 73 ... Insertion piece 74 ... Insertion groove 81 ... First surface plate 82 ... Second surface plate 83 ... Bent portion 84 ... Connection portion 85 ... Core material 91 ... Frame 92 ... Surface plate 93 ... C channel

Claims (5)

A frameless fire door for a building, which is a first surface plate (1) made of a metal plate fixed to the first surface of the door, and a first surface plate opposite to the first surface of the door. A second surface plate (2) made of a metal plate fixed to the surface of 2,
The first surface plate (1) is provided by bending the insertion piece (3) in parallel with the side edge thereof, and the second surface plate (2) is a sandwich for inserting the insertion piece (3). The groove (4) is U-curved, and the insertion piece (3) is inserted into the clamping groove (4) to fix the first surface plate (1) and the second surface plate (2). And
Further, the insertion piece (3) is bent so that its front end edge is folded back in the U-bending direction of the sandwiching groove (4) with a predetermined width, and the first folded laminated piece (31) along the front end edge. The metal plate constituting the clamping groove (4) of the second surface plate (2) is U-curved at the tip which becomes the clamping groove (4). The edge portion is bent so as to be folded back to the inside of the groove with a predetermined width, and a second folded laminated piece (41) for narrowing the opening of the groove is provided to make one side a stepped surface (42).
The first folded laminated piece (31) provided on the insertion piece (3) is guided more inside than the second folded laminated piece (41) of the sandwiching groove (4), so that the first folded folded piece (3) is guided. The stepped surface (32) of the laminated piece (31) and the stepped surface (42) of the second folded laminated piece (41) are engaged with each other, and the first folded laminated piece (31) and the second folded back A frameless fire door for buildings which is fixed so that the front end surfaces of the laminated pieces (41) abut against each other and the first surface plate (1) does not come off from the second surface plate (2).   The frameless fire door for a building according to claim 1, wherein the first face plate (1) and the second face plate (2) are iron plates having a thickness of 0.5 mm to 1.8 mm. .   The distal ends of the first folded laminated piece (31) and the second folded laminated piece (41) arranged to face each other in a state where the inserted piece (3) is inserted into the clamping groove (4). The frameless fire door for buildings according to claim 1, wherein the gap (50) between the faces is 0 mm to 1 mm.   The first surface plate (1) includes a U-curved laminate portion (6) bent so as to be folded inward along a side edge, and is laminated inside the U-curved laminate portion (6). The flameless fire door for buildings according to claim 1, wherein the inner laminated piece (7) is bent at a right angle inside the door to provide an insertion piece (3).   The second surface plate (2) includes a U-curved laminate portion (6) bent so as to be folded inward along the side edge, and is laminated inside the U-curved laminate portion (6). The inner laminated piece (7) is bent at a right angle inside the door to provide a side plate (9), and a clamping groove (4) is provided at the tip of the side plate (9). Frameless fire doors for buildings as described in 1.

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