Door closer connection structure

Abstract

To provide a door closer connecting structure that can suppress damage to its components. [Solution] A door closer 6 is connected to the upper frame 21 of the door frame 2, wherein the back plate 4 is fixed to the metal frame body 251 with a back plate extension 44 having a swing-restricting hole 442 that restricts the swinging of the door closer fixing screw 17 positioned above the upper frame extension 266, the reinforcing member 5 has a reinforcing member upper fixing part 53 fixed to the back plate extension 44 with the reinforcing member body 54 in contact with the upper surface of the resin opposing part 241A1, and the door closer is connected to the upper frame 21 with the door closer fixing screw 17, which is inserted from below into the resin opposing part 241A1 of the resin upper frame material 24, screwed into the reinforcing member body 54 and inserted into the second upper frame insertion hole 266B and the swing-restricting hole 442 of the upper frame extension 266.

Description

Technical Field

[0001] The present invention relates to a connection structure of a door closer.

Background Art

[0002] Conventionally, a connection structure of a door closer that connects a door frame of a building and a door has been known (see, for example, Patent Document 1). In the configuration described in Patent Document 1, the upper frame of the door frame includes a metal upper frame member, a resin upper frame member, and a resin auxiliary frame member. The resin upper frame member is attached to the indoor side of the metal upper frame member. The auxiliary frame member is attached to the inner peripheral side on the indoor side of the resin upper frame member, and forms a hollow portion together with the resin upper frame member. A U-shaped spacer is disposed in the hollow portion. The door closer is fixed to the upper frame by screwing a screw inserted through the auxiliary frame member into the spacer.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the configuration described in Patent Document 1, the tip of the screw for fixing the door closer is located at the center of the hollow portion and is in a free end state. Therefore, there is a risk that the tip of the screw swings as the door closer opens and closes. When the screw swings in this way, there is a risk that the spacer, the auxiliary frame member, or the resin upper frame member with which the screw is screwed may be damaged.

[0005] An object of the present invention is to provide a connection structure of a door closer that can suppress damage to components.

Means for Solving the Problems

[0006] The door closer connecting structure of the present invention is a door closer connecting to the upper frame of a door frame using a backing plate, a reinforcing material and a door closer fixing screw, wherein the door closer fixed to a door that is installed in a door frame so as to be openable and closable, the upper frame comprises a metal upper frame material and a resin upper frame material attached to the metal upper frame material, the metal upper frame material comprises a metal frame body and an upper frame extension portion that extends inward from the metal frame body and has an upper frame insertion hole through which the door closer fixing screw is inserted, the resin upper frame material comprises a resin opposing portion that faces the lower surface of the upper frame extension portion, and the backing plate is front The door closer is provided with a back plate extension having a swing-restricting hole for restricting the swinging of the door closer fixing screw, and the back plate extension is fixed to the metal frame body in a state where it is located above the upper frame extension; the reinforcing member comprises a reinforcing member body and a reinforcing member upper fixing part, and the reinforcing member body is in contact with the upper surface of the resin opposing part, and the reinforcing member upper fixing part is fixed to the back plate extension; and the door closer is connected to the upper frame with the door closer fixing screw, which is inserted from below into the resin opposing part, screwed into the reinforcing member body and inserted through the upper frame insertion hole and the swing-restricting hole. [Effects of the Invention]

[0007] According to the present invention, a door closer connecting structure that can suppress damage to its components can be provided. [Brief explanation of the drawing]

[0008] [Figure 1] A vertical cross-sectional view showing a single-leaf door according to the first embodiment of the present invention. [Figure 2] A disassembled longitudinal cross-sectional view of the door closer connection structure in the aforementioned single-leaf door. [Figure 3] This diagram shows the backing plate used to connect the aforementioned door closer, with (A) being a view from the inside and (B) being a view from below. [Figure 4] This diagram shows the reinforcing material used to connect the aforementioned door closer, with (A) being a view from the inside and (B) being a view from below. [Figure 5] A vertical cross-sectional view showing the door closer connection structure as seen from the door edge side. [Figure 6] A vertical cross-sectional view showing the door closer connection structure as seen from the interior side. [Figure 7] This figure shows a reinforcing member according to a second embodiment of the present invention, where (A) is a view from the interior side, (B) is a view from below, and (C) is a view from the door edge side. [Modes for carrying out the invention]

[0009] [First Embodiment] <Configuration of a single-leaf door> Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. The single-leaf door 1 shown in Figure 1 comprises a door frame 2, which is a door frame attached to an opening in the building structure; a door 3, which is installed within the door frame 2 so as to be able to open and close; and a door closer 6, which is connected to the door frame 2 using a backing plate 4 and a reinforcing material 5. In the following description, the left-right direction of the single-leaf door 1 is defined as the X-axis direction (see, for example, Figure 3(A)), the up-down direction of the single-leaf door 1 is defined as the Y-axis direction, and the depth direction of the single-leaf door 1 is defined as the Z-axis direction. The X, Y, and Z axes are orthogonal to each other.

[0010] The door frame 2 is a four-sided frame formed by joining an upper frame 21, a lower frame 22, and a hinge-side vertical frame and a door-edge vertical frame (not shown) in a rectangular frame shape. The door 3 is attached to the hinge-side vertical frame. The upper frame 21 is composed of a metal upper frame material 23 and a resin upper frame material 24 attached to the metal upper frame material 23. The metal upper frame material 23 is an insulating frame material composed of an outdoor upper frame material 25 and an indoor upper frame material 26, which are formed from aluminum extruded profiles, and an insulating material 27 that connects the outdoor upper frame material 25 and the indoor upper frame material 26. The resin upper frame material 24 comprises a cylindrical portion 241 where the reinforcing material 5 is placed and a tight material mounting portion 242 where the tight material 11 is attached. The resin upper frame material 24 is fixed to the interior upper profile 26. The lower frame 22 is composed of a metal lower frame material 28 and a resin lower frame material 29 attached to the metal lower frame material 28. The metal lower frame member 28 includes a tight material mounting portion 281 to which the tight material 12 is mounted so as to be positioned directly below the tight material 11.

[0011] The back plate 4 is disposed above the indoor upper profile member 26. The back plate 4 is fixed to the hanging element vertical frame side of the outdoor upper profile member 25 made of metal.

[0012] The reinforcing member 5 is disposed below the back plate 4 and the indoor upper profile member 26 and inside the cylindrical portion 241 of the resin upper frame member 24.

[0013] The door closer 6 includes a closer body 61 fixed to the upper part on the indoor side of the door 3 and a link mechanism 62 connecting the closer body 61 and the upper frame 21. The closer body 61 is provided with a rotating shaft 611 protruding upward. The link mechanism 62 includes a first arm 621 whose one end is rotatably connected to the rotating shaft 611, a second arm 622 whose one end is rotatably connected to the other end of the first arm 621, and a bracket 623 whose one end is rotatably connected to the other end of the second arm 622. The bracket 623 is connected to the upper frame 21.

[0014] As shown in FIG. 2, the outdoor upper profile member 25 constituting the upper frame 21 includes a metal frame body 251 formed in a substantially rectangular shape having a hollow portion along the X-axis direction. The metal frame body 251 is composed of an outdoor finding surface portion 251A and an indoor finding surface portion 251B along the Y-axis direction, and prospective surface portions 251C and 251D along the Z-axis direction continuous with the outdoor finding surface portion 251A and the indoor finding surface portion 251B. The indoor finding surface portion 251B is located on the lower end side thereof and is composed of an outdoor connection portion 252 with an opening on the indoor side and a back plate attachment portion 253 located above the outdoor connection portion 252. A fixing plate 254 is fixed to the outdoor side surface of the back plate attachment portion 253. The fixing plate 254 is inserted through the insertion holes of the back plate attachment portion 253 at two locations on both ends in the X-axis direction and is fixed by screws 13 screwed into the female screw portions of the fixing plate 254.

[0015] The indoor upper profile 26 includes a bottom surface portion 261 along the Z-axis direction and a metal frame member fixing portion 262 extending upward from the indoor-side end of the bottom surface portion 261. An indoor connecting portion 263 with an outdoor-side opening is provided at the outdoor-side end of the bottom surface portion 261. At the center of the bottom surface portion 261 in the Z-axis direction, an engaging piece 264 extending downward and a protrusion 265 protruding upward are provided. An engaging claw portion 264A is provided at the lower end of the engaging piece 264. The portion between the metal frame member fixing portion 262 and the protrusion 265 on the bottom surface portion 261 constitutes a plate-shaped upper frame extending portion 266.

[0016] The heat insulation material 27 is provided such that a part of it is located inside the outdoor connecting portion 252 and the indoor connecting portion 263, thereby connecting the outdoor upper profile 25 and the indoor upper profile 26.

[0017] The cylindrical portion 241 of the resin upper frame member 24 has a hollow portion along the X-axis direction, and includes a bottom surface portion 241A along the Z-axis direction, an indoor finding surface portion 241B extending upward from the indoor-side end of the bottom surface portion 241A, an indoor upper surface portion 241C extending outward from the upper end of the indoor finding surface portion 241B, an intermediate finding surface portion 241D extending downward from the outdoor-side end of the indoor upper surface portion 241C, an outdoor upper surface portion 241E extending outward from the lower end of the intermediate finding surface portion 241D, and an outdoor finding surface portion 241F extending downward from the outdoor-side end of the outdoor upper surface portion 241E and connected to the outdoor-side end of the bottom surface portion 241A. A cutout portion 244 indicated by a hatch (diagonal lines) is provided at the portion of the cylindrical portion 241 where the reinforcing member 5 is disposed. The cutout portion 244 is formed by cutting only a part of the indoor upper surface portion 241C, the intermediate finding surface portion 241D, and the outdoor upper surface portion 241E in the X-axis direction, and leaving the remaining portions. The portion of the bottom surface portion 241A exposed upward from the cutout portion 244 functions as a resin facing portion 241A1 facing the lower surface of the upper frame extending portion 266.

[0018] The sealant mounting portion 242 of the resin upper frame material 24 is configured to have an opening on the indoor side, comprising a mounting lower portion 242A that extends outward from the outdoor end of the bottom surface portion 241A of the cylindrical portion 241 and then bends upward, an outdoor visible surface portion 241F, an upper bottom portion 242B that extends upward from the upper end of the outdoor visible surface portion 241F, and a mounting upper portion 242C that extends outward from the upper end of the upper bottom portion 242B and then bends downward. The sealant 11 is mounted in the opening of the sealant mounting portion 242. The upper bottom portion 242B is provided with an engaging projection 245 that protrudes inward and engages with the engaging claw portion 264A of the engaging piece 264. The resin upper frame material 24 includes a resin frame material fixing portion 243 that extends upward from the upper end of the indoor facing surface portion 241B of the cylindrical portion 241. The upper end of the resin frame material fixing portion 243 is provided with a hook portion 243A that protrudes outwards. The resin frame material fixing portion 243 is fixed to the metal frame material fixing portion 262 of the indoor upper profile 26 by screws 14.

[0019] The backing plate 4 is formed by bending a metal plate. The backing plate 4 comprises a backing plate fixing portion 41 along the Z-axis direction, a first intermediate portion 42 extending inward from the lower end of the backing plate fixing portion 41, a second intermediate portion 43 extending downward from the indoor end of the first intermediate portion 42, and a backing plate extension portion 44 extending outward from the lower end of the second intermediate portion 43. As shown in Figures 3(A) and (B), the backing plate fixing portion 41 is provided with two through holes 411 aligned in the X-axis direction. The backing plate extension portion 44 is provided with two female screw portions 441 on both ends in the X-axis direction. Between the two female screw portions 441 in the backing plate extension portion 44, four swing-restricting holes 442 are provided aligned in the X-axis direction. The inner diameter of the swing-restricting hole 442 is slightly larger than the outer diameter of the male threaded portion of the door closer fixing screw 17, which will be described later, for connecting the door closer 6 to the upper frame 21. This configuration suppresses the swinging of the tip of the door closer fixing screw 17 when it is in a free-end state. The back plate 4 is fixed to the outdoor upper profile 25 by back plate fixing screws 15 inserted through the insertion holes 411, such that the back plate extension 44 is sandwiched between the airtight material 7 and the upper frame extension 266, so that no gap is formed between them. As shown in Figure 2, the airtight material 7 has a certain thickness and is positioned sandwiched between the back plate extension 44 and the upper frame extension 266.

[0020] The reinforcing member 5 is attached to the hanging vertical frame side of the upper frame 21. The reinforcing member 5 is formed by bending a metal plate and comprises a lower reinforcing member fixing part 51, a pair of reinforcing member connecting parts 52, and a pair of upper reinforcing member fixing parts 53. The lower reinforcing member fixing part 51 and the reinforcing member connecting parts 52 constitute the reinforcing member body 54. As shown in Figures 4(A) and 4(B), the lower fixing portion 51 of the reinforcing member is formed in the shape of a rectangular plate with its longitudinal direction parallel to the X-axis direction and its transverse direction parallel to the Z-axis direction. The lower fixing portion 51 of the reinforcing member has four female screw portions 511 arranged in the X-axis direction. Each reinforcing member connecting portion 52 is formed in a shape that extends upward along the Y-axis from both sides of the X-axis fixing portion 51 of the reinforcing member, that is, from both sides of the visible side. Each upper fixing portion 53 of the reinforcing member is formed in a shape that extends away from each other along the X-axis from the upper end of each reinforcing member connecting portion 52. Each upper fixing portion 53 of the reinforcing member has one insertion hole 531. The reinforcing member 5 is fixed to the back plate 4 by reinforcing member fixing screws 16, which are inserted into the insertion holes 531 and serve as reinforcing member fasteners.

[0021] The door closer 6 is fixed to the upper frame 21 by door closer fixing screws 17 which are inserted through the bracket 623.

[0022] <Door closer connection structure> As shown in Figure 5, the resin upper frame material 24 is attached to the interior upper profile 26 such that it covers the interior side and bottom surface of the interior upper profile 26. This is achieved by engaging projections 245 with engaging claws 264A of the interior upper profile 26, and by screws 14 inserted through resin frame material fixing parts 243 being screwed into metal frame material fixing parts 262 of the interior upper profile 26.

[0023] As shown in Figures 5 and 6, the back plate 4 is inserted through each of the insertion holes 411 and the insertion holes of the back plate mounting portion 253, and is fixed to the outdoor upper profile 25 by two back plate fixing screws 15 that are screwed into the female threaded portion of the fixing plate 254, so that the back plate extension portion 44 does not form a gap between it and the upper frame extension portion 266 with the airtight material 7 in between. Note that the airtight material 7 becomes thinner when sandwiched between the back plate extension portion 44 and the upper frame extension portion 266, and is therefore not shown in Figures 5 and 6.

[0024] The reinforcing member 5 is fixed to the back plate 4 by reinforcing member fixing screws 16 that are inserted through the insertion hole 531 and the first upper frame insertion hole 266A of the upper frame extension portion 266 and screwed into the female screw portion 441 of the back plate 4, so that within the cylindrical portion 241 of the resin upper frame material 24, the upper end surface of the upper fixing portion 53 of the reinforcing member is in surface contact with the lower surface of the upper frame extension portion 266, and the lower surface of the lower fixing portion 51 of the reinforcing member is in surface contact with the upper surface of the resin opposing portion 241A1. In this way, the lower surface, which is the main surface of the plate-shaped lower fixing portion 51 of the reinforcing material, is in surface contact with the upper surface of the resin opposing portion 241A1 (the inner circumferential surface of the cylindrical portion 241). This increases the contact area between the lower fixing portion 51 of the reinforcing material and the cylindrical portion 241, thereby suppressing deformation of the cylindrical portion 241.

[0025] The door closer 6 is inserted through the insertion hole 623A of the bracket 623 and the insertion hole 241G of the resin upper frame material 24, and is fixed to the upper frame 21 by door closer fixing screws 17 that are screwed into the female threaded portion 511 of the reinforcing material 5, so that the bracket 623 makes surface contact with the lower surface of the resin upper frame material 24, and the tip of the door closer fixing screw 17 is inserted through the second upper frame insertion hole 266B of the upper frame extension portion 266 and the swing restricting hole 442 of the back plate 4.

[0026] <How to connect a door closer> When connecting the door closer 6 to the upper frame 21 of the door frame 2, prepare the following as shown in Figure 2: backing plate 4, reinforcing material 5, door closer 6, airtight material 7, screws 14, backing plate fixing screws 15, reinforcing material fixing screws 16, door closer fixing screws 17, resin upper frame material 24, and exterior upper profile material 25. Next, as shown by the dashed line, the back plate 4 is fixed to the outdoor upper profile 25 with multiple back plate fixing screws 15 while the airtight material 7 is sandwiched between the back plate extension 44 and the upper frame extension 266. By providing the airtight material 7 in this way, it is possible to suppress outside air and water from entering the room through the first and second upper frame insertion holes 266A and 266B of the upper frame extension 266, the female screw portion 441 of the back plate extension 44, and the swing-restricting hole 442. Next, the reinforcing member 5 is fixed to the back plate 4 with two reinforcing member fixing screws 16. By fixing the reinforcing member 5 to the back plate 4 in this way, the worker can release their hands from the reinforcing member 5 and perform subsequent work, improving work efficiency. Next, the reinforcing material 5 is placed inside the cylindrical portion 241 via the cut-out portion 244, and the engaging projection 245 is engaged with the engaging claw portion 264A of the outdoor upper profile 25, and the hook portion 243A is hooked onto the upper end of the metal frame fixing portion 262, thereby temporarily fixing the resin upper frame material 24 to the outdoor upper profile 25. Then, the resin upper frame material 24 is permanently fixed to the outdoor upper profile 25 with multiple screws 14. Finally, the door closer 6 is connected to the upper frame 21 by fixing the door closer 6 to the reinforcing material 5 with multiple door closer fixing screws 17.

[0027] <Effects of the First Embodiment> The back plate 4 is fixed to the metal upper frame material 23 with the back plate extension 44 positioned above the upper frame extension 266. The reinforcing material 5 is fixed to the back plate extension 44 by reinforcing material fixing screws 16 that penetrate the upper frame extension 266, with the reinforcing material body 54 positioned above the resin opposing portion 241A1 of the resin upper frame material 24. The door closer 6 is connected to the upper frame 21 with a door closer fixing screw 17 inserted from below into the resin opposing portion 241A1 and screwed into the female threaded portion 511 of the reinforcing material body 54, and the tip of the door closer fixing screw 17 inserted into the second upper frame insertion hole 266B of the upper frame extension 266 and the swing restricting hole 442 of the back plate 4. Therefore, even if a moment acts to cause the tip of the door closer fixing screw 17 to swing as the door closer 6 opens and closes, the swinging of the tip is restricted by the swing restriction hole 442, thereby preventing damage to the reinforcing material 5 into which the door closer fixing screw 17 is screwed, and to the resin upper frame material 24 through which the door closer fixing screw 17 is inserted.

[0028] The reinforcing member body 54 includes a lower reinforcing member fixing portion 51 having a female screw portion 511 into which the door closer fixing screw 17 is screwed, and a reinforcing member connecting portion 52 that connects the lower reinforcing member fixing portion 51 and the upper reinforcing member fixing portion 53 in a state where the lower reinforcing member fixing portion 51 is in contact with the resin opposing portion 241A1. Therefore, the distance from the screw head of the door closer fixing screw 17 to the screw-in position can be shortened. Consequently, the moment acting on the door closer fixing screw 17 as the door closer 6 opens and closes can be reduced, and loosening of the door closer fixing screw 17 can be suppressed.

[0029] The pair of reinforcing member connecting portions 52 that constitute the reinforcing member 5 are provided so as to extend upward from both visible edges of the lower reinforcing member fixing portion 51. The pair of upper reinforcing member fixing portions 53 are provided so as to be separated from each other from the upper ends of each reinforcing member connecting portion 52. Here, when bending the metal plate for the reinforcing member 5, which has a female screw portion 511 formed on it, in order to suppress deformation of the female screw portion 511 without forming a relief hole in the metal plate, it is necessary to increase the dimension from the connection portion between the lower fixing portion of the reinforcing member and the reinforcing member connecting portion, that is, from the bent portion of the metal plate to the female screw portion 511. When a pair of reinforcing member connecting portions are provided on both edges in the depth direction of the lower fixing portion of the reinforcing member, it is not possible to increase the dimension from the bent portion to the female screw portion 511 without increasing the depth dimension of the reinforcing member. As in this first embodiment, by providing a pair of reinforcing member connecting portions 52 on both visible edges of the lower fixing portion 51 of the reinforcing member, the dimension from the bent portion to the female screw portion 511 can be increased without increasing the depth dimension of the reinforcing member 5. Therefore, bending can be performed while suppressing deformation of the female screw portion 511 without forming relief holes in the metal plate, and the reinforcing member 5 can be easily formed.

[0030] [Second Embodiment] Next, as a second embodiment of the present invention, a reinforcing material applicable in place of the reinforcing material 5 of the first embodiment will be described. The reinforcing member 8 shown in Figures 7(A) to (C) is formed by bending a metal plate and comprises a lower fixing portion 81, a connecting portion 82, and an upper fixing portion 83. The lower fixing portion 81 and the connecting portion 82 constitute the main body 84 of the reinforcing member.

[0031] The lower fixing portion 81 of the reinforcing member is formed in the shape of a rectangular plate with its longitudinal direction parallel to the X-axis direction and its short direction parallel to the Z-axis direction. The lower fixing portion 81 of the reinforcing member has four female screw portions 811 arranged in the X-axis direction.

[0032] The reinforcing member connecting portion 82 is formed in a shape that extends upward along the Y-axis from the interior side edge of the lower reinforcing member fixing portion 81, that is, from one side edge in the depth direction. Four relief holes 85 are provided in the connection portion between the lower fixing portion 81 of the reinforcing material and the connecting portion 82 of the reinforcing material. Each relief hole 85 is provided continuously from a position on the side of the connecting portion 82 of the lower fixing portion 81 of the reinforcing material closer to each female screw portion 811, to the center of the Y-axis direction of the connecting portion 82 of the reinforcing material. By providing such relief holes 85, deformation of the female screw portion 811 can be suppressed when bending the metal plate.

[0033] The upper fixing portion 83 of the reinforcing member is formed to extend outward along the Z-axis from the upper end of the reinforcing member connecting portion 82, so as to face the lower fixing portion 81 of the reinforcing member. The Z-axis positions of the outward ends of the upper fixing portion 83 and the lower fixing portion 81 of the reinforcing member are the same. When viewed from below, the upper fixing portion 83 of the reinforcing member includes a pair of extensions 831 that extend away from each other from both X-axis side edges of the lower fixing portion 81 of the reinforcing member. Each extension 831 has one through hole 831A formed in it. Four through holes 86 are provided in the connection portion between the reinforcing member connecting portion 82 and the reinforcing member upper fixing portion 83. Each through hole 86 is provided continuously from a position above each relief hole 85 in the reinforcing member connecting portion 82 to the vicinity of the outdoor side end of the reinforcing member upper fixing portion 83. Each through hole 86 is formed such that, when viewed from above, the female screw portion 811 is located inside the through hole 86.

[0034] The reinforcing member 8 is positioned inside the cylindrical portion 241 of the resin upper frame material 24, with the reinforcing member connecting portion 82 facing the interior side. The reinforcing member 8 is fixed to the back plate 4 by reinforcing member fixing screws 16 that are inserted through the insertion hole 831A and the first upper frame insertion hole 266A of the upper frame extension portion 266 and screwed into the female screw portion 441 of the back plate 4, such that the upper surface of the upper fixing portion 83 of the reinforcing member is in surface contact with the lower surface of the upper frame extension portion 266, and the lower surface of the lower fixing portion 81 of the reinforcing member is in surface contact with the upper surface of the resin opposing portion 241A1. The door closer fixing screws 17 that secure the door closer 6 to the upper frame 21 are inserted through the insertion hole 623A of the bracket 623 and the insertion hole 241G of the resin upper frame material 24, and screwed into the female threaded portion 811 of the reinforcing material 8. The tip of the door closer fixing screw 17 is inserted through the through hole 86 of the reinforcing material 8, the second upper frame insertion hole 266B of the upper frame extension portion 266, and the swing-restricting hole 442 of the back plate 4.

[0035] [Differentiation] The reinforcing members 5 and 8, specifically the reinforcing member bodies 54 and 84, may be formed in a block shape. In this case, holes for inserting the door closer fixing screws 17 should be provided in the block-shaped reinforcing member bodies 54 and 84, and female threaded portions should be formed in at least a part of these holes into which the door closer fixing screws 17 are screwed. The reinforcing member 8 may be placed inside the cylindrical portion 241 with the reinforcing member connecting portion 82 facing outwards. The lower fixing portion 81 of the reinforcing material 8 may be provided with an insertion hole through which the base end (the part with the screw head) of the door closer fixing screw 17 is inserted, and the upper fixing portion 83 of the reinforcing material may be provided with a female screw portion into which the door closer fixing screw 17 is screwed. The pair of upper fixing portions 53 of the reinforcing member 5 are provided so as to be separated from each other from the upper ends of each reinforcing member connecting portion 52, but they may also be provided so as to be closer to each other, or so as to extend in the same direction along the X-axis. As an example of a fastener for fixing the reinforcing members 5 and 8 to the back plate 4, a reinforcing member fixing screw 16 was used, but rivets could also be used, for example. In the first embodiment, when the door closer fixing screw 17 is fixed to the upper frame 21, the portion of the door closer fixing screw 17 that is inserted into the second upper frame insertion hole 266B and the swing restricting hole 442 is shown to be the tip. However, the length of the door closer fixing screw 17 may be made longer than the length shown in Figure 5, so that the middle or base portion of the door closer fixing screw 17 is inserted into the second upper frame insertion hole 266B and the swing restricting hole 442. In the second embodiment as well, the middle or base portion of the door closer fixing screw 17 may be inserted into the through hole 86 of the reinforcing material 8, the second upper frame insertion hole 266B, and the swing restricting hole 442.

[0036] [Summary of the invention] The door closer connecting structure of the present invention is a door closer connecting to the upper frame of a door frame using a backing plate, a reinforcing material and a door closer fixing screw, wherein the door closer fixed to a door that is installed in a door frame so as to be openable and closable, the upper frame comprises a metal upper frame material and a resin upper frame material attached to the metal upper frame material, the metal upper frame material comprises a metal frame body and an upper frame extension portion that extends inward from the metal frame body and has an upper frame insertion hole through which the door closer fixing screw is inserted, the resin upper frame material comprises a resin opposing portion that faces the lower surface of the upper frame extension portion, and the backing plate is front The door closer is provided with a back plate extension having a swing-restricting hole for restricting the swinging of the door closer fixing screw, and the back plate extension is fixed to the metal frame body in a state where it is located above the upper frame extension; the reinforcing member comprises a reinforcing member body and a reinforcing member upper fixing part, and the reinforcing member body is in contact with the upper surface of the resin opposing part, and the reinforcing member upper fixing part is fixed to the back plate extension; and the door closer is connected to the upper frame with the door closer fixing screw, which is inserted from below into the resin opposing part, screwed into the reinforcing member body and inserted through the upper frame insertion hole and the swing-restricting hole. According to the present invention, even if a moment acts to cause the tip of the door closer fixing screw to swing when the door closer is opened and closed, the swing of the tip is restricted by the swing restriction hole. Therefore, damage to the reinforcing material into which the door closer fixing screw is screwed, and to the resin upper frame material through which the door closer fixing screw is inserted, can be suppressed.

[0037] In the door closer connecting structure of the present invention, it is preferable that the reinforcing member body comprises a lower fixing portion of the reinforcing member and a reinforcing member connecting portion that connects the lower fixing portion of the reinforcing member and the upper fixing portion of the reinforcing member, with the lower fixing portion of the reinforcing member in contact with the resin opposing portion, and that the door closer fixing screw is screwed into the lower fixing portion of the reinforcing member. According to the present invention, the distance from the screw head to the screw engagement position of the door closer fixing screw can be shortened, and the moment acting on the door closer fixing screw as the door closer opens and closes can be reduced. Therefore, loosening of the door closer fixing screw can be suppressed.

[0038] In the door closer connecting structure of the present invention, the reinforcing member comprises a pair of upper fixing portions, a pair of connecting portions, and a lower fixing portion of the reinforcing member, formed by bending a rectangular metal plate, wherein the pair of connecting portions are provided to extend upward from both side edges in the visible direction of the lower fixing portion of the reinforcing member, and the pair of upper fixing portions are provided to extend away from each other, towards each other, or in the same direction from the upper ends of the pair of connecting portions. According to the present invention, the dimension from the connection portion between the lower fixing portion of the reinforcing material and the reinforcing material connecting portion to the female screw portion can be increased without increasing the expected dimensions of the reinforcing material. Therefore, bending can be performed while suppressing deformation of the female screw portion, even without forming relief holes in the metal plate, and the reinforcing material can be easily formed. [Explanation of Symbols]

[0039] 1...Single-leaf door (joinery), 2...Door frame, 3...Door, 4...Backing plate, 5,8...Reinforcement material, 6...Door closer, 16...Reinforcement material fixing screw (reinforcement material fastener), 17...Door closer fixing screw, 21...Upper frame, 23...Metal upper frame material, 24...Resin upper frame material, 41...Backing plate fixing part, 44...Backing plate extension part, 51...Reinforcement material lower fixing part, 52...Reinforcement material connecting part, 53,83...Reinforcement material upper fixing part, 54,84...Reinforcement material body, 241A1...Resin opposing part, 251...Metal frame body, 266...Upper frame extension part, 266B...Second upper frame insertion hole, 442...Swinging restricting hole, 511,811...Female screw part.

Claims

1. A door closer connecting structure for a door closer that is fixed to a door that is installed to open and close freely within a door frame, connecting the door closer to the upper frame of the door frame using a backing plate, reinforcing material and door closer fixing screws, The upper frame comprises a metal upper frame material and a resin upper frame material attached to the metal upper frame material. The aforementioned metal upper frame material comprises a metal frame body and an upper frame extension portion that extends from the metal frame body toward the interior, having an upper frame insertion hole through which the door closer fixing screw is inserted. The resin upper frame material includes a resin opposing portion that faces the lower surface of the upper frame extension, The backing plate is provided with a backing plate extension having a swing-restricting hole that restricts the swinging of the door closer fixing screw, and is fixed to the metal frame body with the backing plate extension positioned above the upper frame extension. The reinforcing member comprises a reinforcing member body and an upper fixing portion of the reinforcing member, wherein the upper fixing portion of the reinforcing member is fixed to the back plate extension portion with the reinforcing member body in contact with the upper surface of the resin opposing portion. The door closer is connected to the upper frame by having the door closer fixing screw, which is inserted from below into the resin opposing portion, screwed into the reinforcing material body and inserted into the upper frame insertion hole and the swing-restricting hole.

2. In the door closer connecting structure described in claim 1, The reinforcing member body comprises a lower fixing portion of the reinforcing member and a reinforcing member connecting portion that connects the lower fixing portion of the reinforcing member and the upper fixing portion of the reinforcing member, with the lower fixing portion of the reinforcing member in contact with the resin opposing portion. The aforementioned door closer fixing screw is screwed into the lower fixing portion of the reinforcing material, forming a door closer connecting structure.

3. In the door closer connecting structure described in claim 2, The reinforcing member comprises a pair of upper fixing parts, a pair of connecting parts, and a lower fixing part, all formed by bending a rectangular metal plate. The pair of reinforcing member connecting portions are provided so as to extend upward from both side edges in the visible direction of the lower fixing portion of the reinforcing member, A door closer connecting structure wherein the pair of upper fixing portions of the reinforcing members are provided so as to be separated from each other, moved closer to each other, or extending in the same direction from the upper ends of the pair of connecting portions of the reinforcing members.

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