Door deformation prevention tool

Abstract

To provide a door deformation prevention tool capable of preventing deformation of a surface plate material of a door to sink inward into the door in a state where a force is applied to the door having an inner space from the outside of the door to the inside.SOLUTION: This door deformation prevention tool disposed in an inner space 3 of a door 1 to prevent deformation of the door 1 comprises: a cylindrical body member 10; and a cylindrical operated member 20. The body member 10 has a first screw 11, and is disposed in the thickness direction of the door 1 so as to abut against one 2A of a pair of surface plate materials 2. The operated member 20 has a second screw 21 engaged with the first screw 11, is disposed in the thickness direction of the door 1 so as to abut against the other 2B of the surface plate materials 2, and rotated with respect to the body member 10 in a prescribed rotation to be displaced relative to the body member 10 toward the other 2B of the surface plate materials 2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a door deformation prevention device, and more particularly to a door deformation prevention device that prevents deformation of a surface panel material of a steel door at the attachment position of a door handle. [Background technology]

[0002] As an attachment structure for attaching a door handle to a swinging door or other door of a building, Patent Document 1 describes an attachment structure in which a door handle is attached to the door at the upper and lower ends of the door. In the attachment structure described in Patent Document 1, a pair of door handles arranged on both the inside and outside of the door are connected by two long bolts at the upper and lower ends of the door and attached to the door. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-196307 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the mounting structure described in Patent Document 1, if the door has a hollow structure, when the bolts are tightened, the pair of surface plates sandwiching the internal space between them deform so as to sink toward the inside of the door. As a result, the bolts become loose as the door is repeatedly opened and closed, making it more likely to rattle.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide a door deformation prevention device that can prevent a door's surface panel material from sinking into the inside of the door when a force is applied from the outside to the inside of a door having an internal space. [Means for solving the problem]

[0006] The door deformation prevention device disclosed in the present application is disposed in an internal space (3) of a door (1) to prevent deformation of the door (1), and includes a cylindrical main body member (10) and a cylindrical operated member (20). The main body member (10) has a first threaded portion (11) and is disposed along the thickness direction of the door (1) so as to abut against one (2A) of a pair of surface plate materials (2) sandwiching the internal space (3). The operated member (20) has a second threaded portion (21) that screws into the first threaded portion (11), is disposed along the thickness direction of the door (1) so as to abut against the other (2B) of the pair of surface plate materials (2), and is displaced relative to the main body member (10) toward the other (2B) of the pair of surface plate materials (2) by being rotated in a predetermined direction with respect to the main body member (10).

[0007] In the door deformation prevention device disclosed in the present application, the main body member (10) and the operated member (20) are inserted into the internal space (3) through an insertion hole (4) provided in the other (2B) of the pair of surface plate materials (2). The operated member (20) has a claw portion (22) and an elastic support portion (23). The claw portion (22) engages with the periphery of the insertion hole (4) when the operated member (20) is inserted into the internal space (3) through the insertion hole (4). The elastic support portion (23) elastically supports the claw portion (22) so that it is displaceable in the radial direction of the operated member (20).

[0008] In the door deformation prevention device disclosed in the present application, the first screw portion (11) and the second screw portion (21) are formed as reverse threads. The reverse threads displace the operated member (20) relative to the main body member (10) toward the other one (2B) of the pair of surface plate materials (2) when the operated member (20) is rotated clockwise relative to the main body member (10). Effect of the Invention

[0009] The door deformation prevention device of the present invention can prevent the surface panel material of a door having an internal space from deforming and sinking toward the inside of the door when a force is applied from the outside of the door toward the inside. [Brief description of the drawings]

[0010] [Figure 1] 1 is a cross-sectional view showing a door deformation prevention device according to an embodiment of the present invention. [Diagram 2] 2(a) is a front view showing a main body member of the embodiment, (b) is a top view showing the main body member of the embodiment, and (c) is a cross-sectional view taken along the line AA in FIG. 2(b). [Diagram 3] 3(a) is a front view showing an operated member of the embodiment, (b) is a top view showing a main body member of the embodiment, (c) is a cross-sectional view taken along line BB in FIG. 3(b), and (d) is a cross-sectional view taken along line CC in FIG. 3(b). [Figure 4] FIG. 3(d) is a partially enlarged view of FIG. [Diagram 5] 1A is a front view showing a first mounting jig of the embodiment, and FIG. [Figure 6] 1A is a front view showing a second mounting jig according to an embodiment, and FIG. [Figure 7A] 1 is a cross-sectional view showing a first step of attaching a door deformation prevention device according to an embodiment of the present invention to a door. FIG. [Figure 7B] 10 is a cross-sectional view showing a second procedure for attaching the door deformation prevention device according to the embodiment of the present invention to a door. FIG. [Figure 7C] 10 is a cross-sectional view showing a third procedure for attaching the door deformation prevention device according to the embodiment of the present invention to a door. FIG. [Figure 7D] 11 is a cross-sectional view showing a fourth step of attaching the door deformation prevention device according to the embodiment of the present invention to a door. FIG. [Figure 8] 8(a) is a front view showing a main body member according to another embodiment of the present invention, (b) is a top view showing a main body member according to another embodiment of the present invention, and (c) is a cross-sectional view taken along the line DD in FIG. 8(b). [Figure 9]FIG. 11 is a plan view showing a fitting hole formed in a door according to another embodiment of the present invention. [Figure 10] FIG. 11 is a cross-sectional view showing a state in which a door deformation prevention device according to another embodiment of the present invention is attached to a door. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The door deformation prevention device according to the embodiment of the present invention will be described in detail below with reference to the drawings. Note that the embodiment described below is a preferred specific example for carrying out the present invention, and therefore various technical limitations are imposed thereon, but the present invention is not limited to this embodiment unless otherwise specified in the following description to limit the invention.

[0012] First embodiment DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A door deformation prevention device according to an embodiment of the present invention will be described below with reference to FIGS.

[0013] FIG. 1 is a cross-sectional view showing a door deformation prevention device according to an embodiment of the present invention. FIG. 2(a) is a front view showing a main body member of the embodiment. FIG. 2(b) is a top view showing a main body member of the embodiment. FIG. 2(c) is a cross-sectional view taken along the line AA in FIG. 2(b). FIG. 3(a) is a front view showing an operated member of the embodiment. FIG. 3(b) is a top view showing an operated member of the embodiment. FIG. 3(c) is a cross-sectional view taken along the line BB in FIG. 3(b). FIG. 3(d) is a cross-sectional view taken along the line CC in FIG. 3(b). FIG. 4 is a partially enlarged view of FIG. 3(d). FIG. 5(a) is a front view showing a first mounting jig of the embodiment. FIG. 5(b) is a top view showing a first mounting jig of the embodiment. FIG. 6(a) is a front view showing a second mounting jig of the embodiment. FIG. 6(b) is a top view showing a second mounting jig of the embodiment.

[0014] As shown in Fig. 1, the door deformation prevention device according to the embodiment is used for a steel door, that is, a door 1. The door 1 has a pair of parallel surface plate materials 2 (a first plate material 2A and a second plate material 2B) that are arranged opposite each other, and an internal space 3 between the pair of surface plate materials 2.

[0015] The door deformation prevention device of the embodiment is generally cylindrical, is disposed in the internal space 3 of the door 1, and has a hollow portion through which an axial member such as a bolt for attaching the door handle to the door 1 can be inserted. The door deformation prevention device of the embodiment includes a cylindrical main body member 10 and a cylindrical operated member 20, and prevents the pair of surface plate members 2 of the door 1 from deforming against a force applied from the outside to the inside of the door 1.

[0016] As shown in FIG. 2, in this embodiment, the main body member 10 is cylindrical, has a first screw portion 11 which is a female screw on its inner circumference, and is arranged in the internal space 3 along the thickness direction of the door 1 so as to abut against the first plate material 2A which is one of a pair of surface plate materials 2.

[0017] In the embodiment, the main body member 10 has both ends open, and has a first engaged portion 12 at a position adjacent to one end opening. The first engaged portion 12 is engaged with a second mounting jig 40 described below in order to prevent rotation of the main body member 10. In the embodiment, an annular protrusion 10a is formed on one end face of the main body member 10, and the first engaged portion 12 is formed in the protrusion 10a as a pair of groove-shaped portions.

[0018] As shown in FIG. 3, in this embodiment, the operated member 20 is cylindrical, has a second screw portion 21 which is a male screw on its outer periphery, and is arranged in the internal space 3 along the thickness direction of the door 1 so as to abut against the second plate material 2B which is the other of the pair of surface plate materials 2.

[0019] The second screw portion 21 screws into the first screw portion 11, and when the operated member 20 is rotated in a predetermined direction relative to the main body member 10 with the first screw portion 11 and the second screw portion 21 screwed into each other, the operated member 20 is displaced relative to the main body member 10 toward the first plate material 2B. The overall length of the deformation prevention device becomes longer as the operated member 20 is displaced relative to the main body member 10 toward the first plate material 2B.

[0020] Conversely, by rotating the operated member 20 in the opposite direction to the predetermined direction relative to the main body member 10, the operated member 20 is displaced relative to the main body member 10 in the direction away from the first plate material 2B, and the overall length of the deformation prevention device becomes shorter. Therefore, the overall length of the door deformation prevention device of the embodiment is adjustable by rotating the operated member 20 relative to the main body member 10.

[0021] Moreover, the first screw portion 11 and the second screw portion 21 are formed as reverse threads. A reverse thread is a thread that displaces the operated member 20 toward the second plate material 2B relative to the main body member 10 when the operated member 20 is rotated clockwise relative to the main body member 10. Therefore, the door deformation prevention device of the embodiment has a longer overall length when the operated member 20 is rotated clockwise relative to the main body member 10.

[0022] The door 1 has an insertion hole 4 in the second plate material 2B and an engagement hole 5 in the first plate material 2A. The insertion hole 4 is a hole into which the main body member 10 and the operated member 20 are inserted when the deformation prevention device is placed in the internal space 3, and the engagement hole 5 is a hole into which the protrusion 10a of the main body member 10 is engaged when the deformation prevention device is placed in the internal space 3.

[0023] 3(a), the operated member 20 has a large diameter portion 20a and a small diameter portion 20b that are coaxially arranged. The large diameter portion 20a has a claw portion 22, an elastic support portion 23, and a second engaged portion 24, and the small diameter portion 20b has a second screw portion 21 on the outer periphery.

[0024] The claw portion 22 engages with the periphery of the insertion hole 4 in a state in which the operated member 20 is inserted into the internal space 3 through the insertion hole 4. The elastic support portion 23 elastically supports the claw portion 22 so as to be displaceable in the radial direction of the operated member 20. In the embodiment, the elastic support portion 23 elastically supports the claw portion 22 such that, in a natural state, the claw portion 22 protrudes radially outward by an appropriate protruding height from the outer circumferential surface of the large diameter portion 20a.

[0025] As shown in Fig. 3(b), in this embodiment, the large diameter portion 20a has four claws 22 arranged at 90 degree intervals in the circumferential direction. As shown in Fig. 3(d) and Fig. 4, the distance R1 between the protruding direction tips of two claws 22 located 180 degrees apart in the circumferential direction is slightly (for example, 0.6 to 1.0 mm) larger than the inner diameter R2 of the insertion hole 4 shown in Fig. 7A.

[0026] The distance R1 is slightly larger than the inner diameter R2 of the insertion hole 4, and the elastic support portion 23 elastically supports the claw portion 22 so that it is displaceable in the radial direction of the operated member 20. As a result, the claw portion 22 moves radially inward of the large diameter portion 20a when the operated member 20 passes through the insertion hole 4, and engages with the periphery of the insertion hole 4 after the operated member 20 passes through the insertion hole 4. As the claw portion 22 engages with the periphery of the insertion hole 4, the operated member 20 abuts against the second plate material 2B.

[0027] In addition, as shown in FIG. 4, the end face of the claw portion 22 that engages with the circumferential portion of the insertion hole 4 is inclined in a direction retreating from the end face of the large diameter portion 20a as it moves radially outward of the large diameter portion 20a in order to prevent the deformation prevention device from shifting relative to the insertion hole 4, and the position of the end face itself that engages with the circumferential portion of the insertion hole 4 is also set at a position retreated from the end face of the large diameter portion 20a.

[0028] The second engaged portion 24 is a pair of deep groove-like portions formed on the end face of the tubular large diameter portion 20a, as shown in Figure 3, and engages with the first mounting jig 30 shown in Figure 5 when the operated member 20 is rotated.

[0029] Next, the first mounting jig 30 will be described with reference to Fig. 5. The first mounting jig 30 has a circular gripping portion 31, a thin cylindrical mounting portion 32, and a thick cylindrical base portion 33. The gripping portion 31, the mounting portion 32, and the base portion 33 are provided coaxially.

[0030] The gripping portion 31 is a portion that is gripped when rotating the operated member 20. The mounting portion 32 is a portion to which the door deformation prevention device of the embodiment is attached, and has a first engagement portion 32a and a shaft insertion hole 32b. The base portion 33 is a portion that supports the mounting portion 32 on the gripping portion 31.

[0031] The first engagement portion 32a is a cylindrical protrusion that protrudes radially outward from the outer circumferential surface of the mounting portion 32, and engages with the second engaged portion 24 of the operated member 20 when the operated member 20 is rotated.

[0032] The base 33 is located between the grip portion 31 and the mounting portion 32, and has a diameter that allows it to be inserted into the insertion hole 4 with a predetermined play. Since the base 33 can be inserted into the insertion hole 4 with a predetermined play (for example, a play of about 0.4 mm), the deformation prevention device can be appropriately positioned when installed on the door 1.

[0033] Next, the second mounting jig 40 will be described with reference to Fig. 6. The second mounting jig 40 has a circular gripping portion 41, a thick cylindrical base portion 42, and a thin cylindrical fitting shaft portion 43. The gripping portion 41, the base portion 42, and the fitting shaft portion 43 are arranged coaxially.

[0034] The grip portion 41 is a portion that is gripped for an operation of preventing rotation of the main body member 10. The base portion 42 is a portion that supports the first engagement portion 42a and the fitting shaft portion 43 on the grip portion 41.

[0035] The first engaging portion 42a is a short cylindrical protrusion that protrudes radially outward from the outer circumferential surface of the base portion 42, and engages with the first engaged portion 12 of the main body member 10 to prevent the main body member 10 from rotating.

[0036] The fitting shaft portion 43 is fitted into the shaft fitting hole 32b of the first mounting jig 30 so as to facilitate the operation of engaging the first engaging portion 42a with the first engaged portion 12.

[0037] Hereinafter, a procedure for attaching the door deformation prevention device of the embodiment to the door 1 will be described with reference to Figs. 7A to 7D.

[0038] (1) As shown in FIG. 7A , with the second screw portion 21 of the operated member 20 being tightened to the first screw portion 11 of the main body member 10 to its limit, the deformation prevention device is attached to the mounting portion 32 of the first mounting jig 30 by inserting the mounting portion 32 into the hollow portion of the deformation prevention device.

[0039] (2) As shown in FIG. 7B, the deformation prevention tool is inserted into the internal space 3 of the door 1 through the insertion hole 4 until the protruding portion 10a of the main body member 10 fits into the fitting hole 5.

[0040] (3) As shown in FIG. 7C, the axial insertion portion 43 of the second mounting jig 40 is inserted into the axial insertion hole 32b of the first mounting jig 30, and the second engagement portion 42a of the second mounting jig 40 is engaged with the first engaged portion 12 of the main body member 10.

[0041] (4) As shown in Fig. 7D, the gripping portion 31 of the first mounting jig 30 is rotated clockwise so that the operated member 20 is displaced toward the second plate material 2B relative to the main body member 10. The rotation operation is continued until the claw portion 22 of the operated member 20 abuts against the periphery of the insertion hole 4 and the load of the rotation operation becomes sufficiently large.

[0042] As described above with reference to Figures 1 to 7D, according to the door deformation prevention device of the embodiment, a main body member 10 having a first screw portion 11 is arranged in the internal space 3 along the thickness direction of the door 1 so as to abut against the first plate material 2A, and an operated member 20 having a second screw portion 21 is arranged in the internal space 3 along the thickness direction of the door 1 so as to abut against the second plate material 2B, and with the first screw portion 11 and the second screw portion 21 screwed together, the operated member 20 is rotated in a predetermined direction relative to the main body member 10, whereby it is displaced relative to the main body member 10 toward the second plate material 2B.

[0043] Therefore, by installing the door deformation prevention device of the embodiment at a location where force is applied to the first plate material 2A and the second plate material 2B from the outside to the inside of the door 1, it is possible to prevent deformation of the first plate material 2A and the second plate material 2B like a brace, and to prevent deformation such that the surface plate material 2 (2A, 2B) of the door 1 sinks toward the inside of the door 1 when force is applied from the outside to the inside of the door 1, which has an internal space 3.

[0044] In addition, the overall length of the door deformation prevention device of the embodiment can be adjusted by rotating the operated member 20. Therefore, it can be used for doors of various thicknesses, and by preparing one type of deformation prevention device, it is possible to accurately prevent the deformation of doors of various thicknesses. In addition, in manufacturing the deformation prevention device, it is not necessary to prepare molds of various sizes, and manufacturing costs can be reduced.

[0045] As described with reference to Figures 1 to 7D, the door deformation prevention device of the embodiment is inserted into the internal space 3 through the insertion hole 4, and the claw portion 22 of the operated member 20 is elastically supported by the elastic support portion 23 so as to be displaceable in the radial direction of the operated member 20, and the claw portion 22 engages with the periphery of the insertion hole 4 when the operated member 20 is inserted into the internal space 3, thereby causing the operated member 20 to abut against the second plate material 2B.

[0046] Therefore, by forming an insertion hole 4 in the door 1 with a diameter that allows the operated member 20 to be inserted with little play, a deformation prevention device can be installed in the internal space 3 of the door 1 after the door 1 is manufactured. This makes it possible to flexibly reinforce the door 1 as needed, for example at a construction site, to prevent it from being deformed by external forces, resulting in high convenience.

[0047] Furthermore, as described with reference to Figures 1 to 7D, according to the door deformation prevention device of the embodiment, the first screw portion 11 and the second screw portion 21 are formed as reverse threads, and when the operated member 20 is rotated clockwise relative to the main body member 10, it is displaced relative to the main body member 10 toward the second plate material 2B.

[0048] Therefore, as shown in Figures 7C and 7D, when rotating the first mounting jig 30 with the deformation prevention device inserted into the internal space 3 of the door 1, most people with experience turning screws will rotate the first mounting jig 30 clockwise, and will be able to intuitively perform the correct rotation operation to extend the overall length of the door deformation prevention device, making it easy to install the door deformation prevention device.

[0049] Second Embodiment Next, another embodiment of the present invention will be described with reference to FIGS.

[0050] Fig. 8(a) is a front view showing a main body member of another embodiment of the present invention. Fig. 8(b) is a top view showing a main body member of another embodiment of the present invention. Fig. 8(c) is a cross-sectional view taken along the line DD in Fig. 8(b). Fig. 9 is a plan view showing a fitting hole formed in a door of another embodiment of the present invention. Fig. 10 is a cross-sectional view showing a state in which a door deformation prevention device according to another embodiment of the present invention is attached to a door.

[0051] In the first embodiment described above, the rotation of the main body member 10 is prevented by using the second mounting jig 40, as shown in FIG. 7C.

[0052] In this embodiment, as shown in Fig. 8, the main body member 10A has a protruding third engaged portion 13. The third engaged portion 13 is formed so as to protrude radially outward from the outer circumferential surface of the protruding portion 10a.

[0053] In this embodiment, a fitting hole 5A is formed in the door 1 as shown in Fig. 9. The fitting hole 5A has a third engagement portion 6. When the third engaged portion 13 of the main body member 10A engages with the third engaging portion 6 of the fitting hole 5A, the rotation of the main body member 10A is prevented, and the operated member 20 is rotated until it reaches the state shown in Fig. 10. Other than the above, this embodiment is similar to the first embodiment described above.

[0054] According to this embodiment, the third engaged portion 13 engages with the third engaging portion 6 to prevent rotation of the main body member 10A, so that the deformation prevention device can be attached to the door 1 without using the second mounting jig 40.

[0055] The embodiments of the present invention have been described above with reference to the drawings (FIGS. 1 to 10). However, the present invention is not limited to the above-described embodiments, and can be embodied in various forms without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0056] 1. Door 2…Surface plate material 2A…First plate material 2B…Second plate material 3. Interior space 4...Insertion hole 10, 10A…Main body parts 11…First screw part 20...Operated member 21…Second screw part 22…Claw part 23...Elastic support part

Claims

1. A door deformation prevention device that is disposed in an internal space (3) of a door (1) and prevents deformation of the door (1), comprising: a cylindrical main body member (10) having a first screw portion (11) and disposed along the thickness direction of the door (1) so as to abut against one (2A) of a pair of surface plate materials (2) sandwiching the internal space (3); a cylindrical operated member (20) having a second screw portion (21) that screws into the first screw portion (11), disposed along the thickness direction of the door (1) so as to abut against the other (2B) of the pair of surface plate materials (2), and displaced relative to the body member (10) toward the other (2B) of the pair of surface plate materials (2) by being rotated in a predetermined direction with respect to the body member (10); A door deformation prevention device comprising:

2. The main body member (10) and the operated member (20) are inserted into the internal space (3) through an insertion hole (4) provided in the other (2B) of the pair of surface plate materials (2); 2. The door deformation prevention device according to claim 1, wherein the operated member (20) has a claw portion (22) that engages with the periphery of the insertion hole (4) when the operated member (20) is inserted into the internal space (3) through the insertion hole (4), and an elastic support portion (23) that elastically supports the claw portion (22) so that the operated member (20) can be displaced in the radial direction.

3. 3. A door deformation prevention device as described in claim 1 or claim 2, wherein the first screw portion (11) and the second screw portion (21) are formed as reverse threads that displace the operated member (20) relative to the main body member (10) toward the other one (2B) of the pair of surface panel materials (2) when the operated member (20) is rotated clockwise relative to the main body member (10).

Images