Door handle

Abstract

To provide a door handle capable of suppressing an increase in weight and suppressing deflection when opening / closing a door, thereby improving an operation feeling, even when a handle main body has a long shape.SOLUTION: The door handle comprises a long handle main body 10 and a pair of fixing members 20. The handle main body 10 includes a hollow cylindrical exterior member 11 and a long reinforcement member 12, and is disposed in a vertical direction. The reinforcement member 12 is a hollow cylindrical material work-hardened by plastic deformation, which is disposed in a hollow part 11a of the exterior member 11. The pair of fixing members 20 fixes the handle main body 10 on a door 1 at a top part and a bottom part of the handle main body 10.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a door handle, and more particularly to an elongated door handle that is attached to a door such as a hinged door of a building. [Background technology]

[0002] As a long door handle to be attached to a hinged door or other door of a building, Patent Document 1 describes a door handle fixed to the upper and lower ends of the door. The door handle described in Patent Document 1 includes a long handle body and a pair of fixing members. The handle body is fixed to the door by the pair of fixing members at the upper and lower ends of the handle body.

[0003] In a long door handle as described in Patent Document 1, bending of the handle when opening and closing the door can be a problem. The human hand has an excellent sense for sensing subtle deformations and displacements, and if the door handle is deformed or bent when opening and closing the door, the human feels uncomfortable and the feel of operating the door handle decreases. In addition, if the bending of the door handle becomes visible, the fingers may collide with the door when pushing the door open, resulting in injury. In addition, if the door handle is bent when the door is repeatedly opened and closed, the deformation of the handle body is repeated, which may cause loosening of the bolts connecting the handle body to the pair of fixing members and the screws attaching the pair of fixing members to the door.

[0004] In order to solve the above problems, in the door handle described in Patent Document 1, the pair of fixing members are each connected to the handle body by two bolts arranged side by side in the longitudinal direction of the handle body. By connecting the pair of fixing members to the handle body by two bolts arranged side by side in the longitudinal direction of the handle body, it is possible to suppress bending of the handle body when opening and closing the door. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2010-196307 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the door handle described in Patent Document 1, the deflection of the handle body may not be sufficiently suppressed depending on the material, shape, and size of the handle body. In particular, when a hollow pipe-shaped material is used as the material for the handle body to reduce weight and the thickness of the pipe wall is made thin, deflection is likely to occur.

[0007] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a door handle that can suppress an increase in weight even when the handle body is long, suppresses bending when opening and closing the door, and improves the operability. [Means for solving the problem]

[0008] The door handle disclosed in the present application comprises an elongated handle body (10) arranged in the vertical direction, and a pair of fixing members (20). The handle body (10) includes a hollow tubular exterior member (11) and an elongated reinforcing member (12). The reinforcing member (12) is made by work-hardening a tubular material through plastic deformation, and is disposed in the hollow portion (11a) of the exterior member (11). The pair of fixing members (20) fix the handle body (10) to the door (1) at the upper and lower parts of the handle body (10).

[0009] In the door handle disclosed in the present application, the plastic deformation is a torsional deformation of the tubular material.

[0010] In the door handle disclosed in the present application, the exterior member (11) is cylindrical, and the material of the reinforcing member (20) is rectangular tubular.

[0011] Furthermore, in the door handle disclosed in the present application, the reinforcing member (12) has non-deformed portions (12a) at both ends, has a torsionally deformed deformed portion (12b) between the non-deformed portions (12a) at both ends, and is integrally connected to the exterior member (11) at the non-deformed portion (12a).

[0012] Furthermore, in the door handle disclosed in the present application, the torsional deformation of the material of the reinforcing member (12) is set based on the angle at which the outer circumferential corner portion (12c) of the reinforcing member (12) can abut against the inner circumferential surface (11a) of the exterior member (11) in all circumferential directions of the exterior member (11), in which the torsional deformation of the material of the reinforcing member (12) per length (L1) of the portion that comes into contact with the hand gripping the exterior member. Effect of the Invention

[0013] According to the door handle of the present invention, even when the handle body is long, an increase in weight is suppressed, bending when opening and closing the door is suppressed, and the operability is improved. [Brief description of the drawings]

[0014] [Figure 1] 1 is a vertical cross-sectional view showing a door handle according to an embodiment of the present invention. [Diagram 2] 1 is a cross-sectional view showing a door handle according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a plan view showing the door handle according to the embodiment of the present invention. [Figure 4] 1A is a front view of the reinforcing member of the embodiment, (b) is a left side view of the reinforcing member of the embodiment, and (c) is a top view of the reinforcing member of the embodiment. [Diagram 5] 1A is a perspective view showing the reinforcing member of the embodiment before plastic deformation, FIG. 1B is a perspective view showing the reinforcing member of the embodiment after plastic deformation, and FIG. 1C is a perspective view showing an operation of attaching the reinforcing member of the embodiment to an exterior member. [Figure 6]1A is a diagram conceptually illustrating a first stage of an experiment according to an embodiment of the present invention, and FIG. 1B is a diagram conceptually illustrating a second stage of an experiment according to an embodiment of the present invention. [Figure 7] FIG. 11 is a graph showing experimental results according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] The door handle 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. However, the present invention is not limited to this embodiment unless otherwise specified in the following description to limit the invention.

[0016] <Embodiment> A door handle according to an embodiment of the present invention will be described below with reference to Figs. 1 to 5. Fig. 1 is a vertical cross-sectional view of a door handle according to an embodiment of the present invention. Fig. 2 is a horizontal cross-sectional view of a door handle according to an embodiment of the present invention. Fig. 3 is a plan view of a door handle according to an embodiment of the present invention. Fig. 4(a) is a front view of a reinforcing member according to an embodiment. Fig. 4(b) is a left side view of a reinforcing member according to an embodiment. Fig. 4(c) is a top view of a reinforcing member according to an embodiment. Fig. 5(a) is a perspective view of a reinforcing member according to an embodiment before plastic deformation. Fig. 5(b) is a perspective view of a reinforcing member according to an embodiment after plastic deformation. Fig. 5(c) is a perspective view showing an operation of attaching a reinforcing member according to an embodiment to an exterior member.

[0017] As shown in Figures 1 to 3, the door handle of the embodiment is attached to a door 1 such as a hinged door of a building, and includes a long handle body 10 and a pair of fixing members 20. The handle body 10 includes a hollow tubular exterior member 11 and a long reinforcing member 12, and is arranged in the vertical direction. The pair of fixing members 20 fix the handle body 10 to the door 1 at the upper and lower parts of the handle body 10.

[0018] The exterior member 11 of the embodiment is made of metal, has a cylindrical shape, and has a hollow portion 11a.

[0019] The reinforcing member 12 is a cylindrical metal material that has been work-hardened by plastic deformation, and is disposed in the hollow portion 11a of the exterior member 11. In the embodiment, the material of the reinforcing member 12 has a rectangular cylindrical shape with a square cross-sectional outline. The plastic deformation of the material of the reinforcing member 12 is torsional deformation.

[0020] The reinforcing member 12 has non-deformed portions 12a at both ends, has deformed portions 12b that are plastically deformed between the non-deformed portions 12a at both ends, and is integrally connected to the exterior member 11 at the non-deformed portions 12a at both ends. In the embodiment, the reinforcing member 12 is integrally connected to the exterior member 11 and the pair of fixing members 20 by bolts 13 at the non-deformed portions 12a at both ends.

[0021] As shown in FIG. 4, the torsional deformation of the material of the reinforcing member 12 is set based on the torsional angle α per length L1 of the portion that comes into contact with the hand gripping the exterior member 11, which is set based on the angle at which the outer circumferential corner portion 12c of the reinforcing member 12 can abut against the inner surface 11b in all circumferential directions of the exterior member 11.

[0022] Considering that the width of a child's hand or the palm of an average adult male is about 4 to 10 cm (centimeters), the length L1 can be in the range of 4 to 10 cm. For example, when L1=5 cm, and a rectangular tubular material with a square cross-sectional outer shape is used as the material of the reinforcing member 12, if the twist angle α per 5 cm (=L1) is α=90 degrees in the deformed portion 12b of the reinforcing member 12, the outer peripheral corner portion 12c can be abutted against the inner peripheral surface 11b in all directions in the circumferential direction of the exterior member 11. The length L1 may be 3 to 11 cm, preferably 4 to 10 cm, and more preferably 5 to 9 cm.

[0023] As shown in FIG. 5, reinforcing member 12 formed by twisting a tubular material is inserted into tubular exterior member 11 from an opening on its end surface.

[0024] <Example> Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

[0025] Fig. 6(a) is an explanatory diagram conceptually showing a first stage of an experiment according to an embodiment of the present invention. Fig. 6(b) is an explanatory diagram conceptually showing a second stage of an experiment according to an embodiment of the present invention. Fig. 7 is a graph diagram showing the results of an experiment according to an embodiment of the present invention.

[0026] In general, when a hollow cylindrical metal material is supported at two points and a concentrated load P is applied to the center, the deflection δ is expressed as follows: E: Young's modulus, I1: moment of inertia (mm 4 ), and L is the distance between the supports, which is expressed by the following formula 1.

[0027] δ = (P × L 3 ) / (48×E×I1) (1)

[0028] Moreover, the second moment of area I1 of a hollow cylindrical metal material is expressed by the following formula 2, where D is the outer diameter of the material and d is the inner diameter of the material.

[0029] I1 = π(D 4 -d 4 ) / 64 (2)

[0030] In addition, the second moment of area I2 of a rectangular tubular metal material whose cross-section has a square outer shape is expressed by the following equation 3, where H is the length of one side of the outer dimension of the cross-section and h is the length of one side of the inner dimension of the cross-section.

[0031] I2 = π(H 4 -h 4 ) / one two three)

[0032] In the following examples and comparative examples, various types of test bodies 100 that can be used as handle bodies were prepared as shown in Fig. 6(a), and the test bodies 100 were supported at two points that should be supported by a pair of fixing members 20. Experiments were conducted to measure the deflection δ when various values ​​of concentrated loads P were applied to the center of the test bodies 100 as shown in Fig. 6(b). The distance L between the supports was set to 1400 mm. The experimental results are shown in Fig. 7. Note that the horizontal axis of Fig. 7 indicates the concentrated load P, and the vertical axis indicates the deflection δ.

[0033] <Example> A cylindrical material (SUS304) with an outer diameter D of 34 mm and an inner diameter d of 31 mm was prepared as the exterior member. A rectangular cylindrical material (STK400) with a cross section of H: 22 mm, h: 18.8 mm and a square shape was twisted and used as the reinforcing member. The twist angle per 5 cm of the deformed part of the reinforcing member was 90 degrees. The diagonal length of the 22 x 22 mm square was approximately 31.1 mm.

[0034] A reinforcing member was inserted into the hollow portion of the exterior member, and non-deformed portions at both ends of the reinforcing member were fixed to the exterior member with bolts to prepare an example experimental body 100. A concentrated load P was applied to the example experimental body 100 in increments of 10 kgf from 10 kgf (1 kgf (kilogram-force): approximately 9.81 N (Newton)) to 100 kgf.

[0035] <Comparative Example> A cylindrical material (SUS304) with an outer diameter D of 34 mm and an inner diameter d of 31 mm, the same as in the embodiment, was prepared as an exterior member, and a square tubular material (STK400) with a cross section of H of 22 mm and h of 18.8 mm, the same as in the embodiment, was used as a reinforcing member without being twisted and fixed to the exterior member with bolts at the same positions as in the embodiment, to prepare a comparative example 100. Concentrated loads P from 10 kgf to 100 kgf in increments of 10 kgf were also applied to the comparative example 100.

[0036] According to the above examples and comparative examples, it was confirmed that the experimental body 100 is less likely to bend when a torsionally deformed material is placed in the hollow part of the exterior member as a reinforcing member, as shown in Fig. 7, than when a non-torsionally deformed material is placed as the reinforcing member. Also, when each of the experimental bodies 100 of the examples and comparative examples was attached to a door as a door handle and the door was actually opened and closed, it was confirmed that the examples had a higher sense of rigidity than the comparative examples, and that the use of a torsionally deformed reinforcing member improves the operability of the door handle.

[0037] As described above with reference to Figures 1 to 7, according to the door handle of the embodiment, the handle body 10 includes a hollow cylindrical exterior member 11 and a long reinforcing member 12, and the reinforcing member 12 is formed by work-hardening a cylindrical material through plastic deformation.

[0038] By forming the reinforcing member 12 by work-hardening a cylindrical material through plastic deformation, the reinforcing member 12 can be formed to be less prone to deformation than the material itself, and when achieving the same resistance to bending, a material with a smaller tube thickness and lighter weight can be used as the material for the reinforcing member 12, so that even if the handle body is long, the weight can be prevented from increasing, bending when opening and closing the door can be prevented, and the operability of the door handle can be improved. As a result, as shown in Fig. 3, bending of the handle body can be prevented without supporting the center of the handle body with a support 120, and a good operability of the door handle can be obtained.

[0039] 1 to 7, in the door handle of the embodiment, the plastic deformation of the material of the reinforcing member 12 is a torsional deformation of the tubular material. By the plastic deformation being a torsional deformation, the long reinforcing member 12 can be easily produced from a long material, and the production of the reinforcing member 12 can be facilitated.

[0040] 1 to 7, in the door handle of the embodiment, the exterior member 11 is cylindrical, and the material of the reinforcing member 12 is rectangular tubular. Since the material of the reinforcing member 12 is rectangular tubular and the plastic deformation is torsional deformation, the reinforcing member 12 can be formed so that the outer peripheral corners 12c abut against the inner peripheral surface in all directions in the circumferential direction of the exterior member 11, and the exterior member 11 can be reinforced to suppress deformation, thereby improving the operability.

[0041] 1 to 7, in the door handle of the embodiment, the reinforcing member 12 has non-deformed portions 12a at both ends, has plastically deformed deformed portions 12b between the non-deformed portions 12a at both ends, and is integrally connected to the exterior member 11 at the non-deformed portions 12a. By integrally connecting the reinforcing member 12 to the exterior member 11 at both ends, when the exterior member 11 is deformed by an external force, the external force can be effectively transmitted to the reinforcing member 12, deflection can be more effectively suppressed, and the operability when opening and closing the door can be improved.

[0042] 1 to 7, according to the door handle of the embodiment, the twisting deformation of the material of the reinforcing member 12 is set based on the angle at which the outer circumferential corners 12c can abut against the inner circumferential surface 11b in all directions in the circumferential direction of the exterior member 11, where the twisting angle α per length L1 of the portion that comes into contact with the hand gripping the exterior member 11. Therefore, the exterior member 11 can be effectively reinforced by being supported from the inside in all directions by the outer circumferential corners 12c per length L1 of the portion that comes into contact with the hand gripping the exterior member 11, and the operability of the door handle when opening and closing the door 1 can be further effectively improved.

[0043] The embodiments of the present invention have been described above with reference to the drawings (FIGS. 1 to 7). However, the present invention is not limited to the above-described embodiments, and can be embodied in various forms without departing from the spirit of the present invention (for example, the following (1)).

[0044] (1) In the above embodiment, a cylindrical material having a square outer cross-section was used as the material for the reinforcing member, but this is not limited to this. A cylindrical material having a polygonal cross-section with five or more sides or a triangle may also be used as the material for the reinforcing member, or a cylindrical material having a circular outer cross-section may also be used. [Explanation of symbols]

[0045] 1. Door 10…Handle body 11…Exterior material 11b…Inner peripheral surface 12...Reinforcing member 12a…Non-deformed section 12b…Deformed section 12c…Outer corner 20...Fixing member

Claims

1. A long handle body (10) arranged in the vertical direction, the handle body (10) including a hollow cylindrical exterior member (11) and a long reinforcing member (12) arranged in a hollow portion of the exterior member, the long reinforcing member being made by processing and hardening a cylindrical material through plastic deformation; A pair of fixing members (20) for fixing the handle body (10) to the door (1) at the upper and lower parts of the handle body (10). A door handle comprising:

2. The door handle according to claim 1 , wherein the plastic deformation is a torsional deformation of the tubular material.

3. 3. The door handle according to claim 2, wherein the exterior member (11) is cylindrical, and the material of the reinforcing member (12) is rectangular tubular.

4. 4. The door handle of claim 3, wherein the reinforcing member (12) has non-deformed portions (12a) at both ends and a twisted deformed portion (12b) between the non-deformed portions (12a) at both ends, and is integrally connected to the exterior member (11) at the non-deformed portions (12a).

5. 5. The door handle according to claim 3, wherein the torsional deformation of the material of the reinforcing member (12) is set based on an angle at which an outer circumferential corner portion (12c) of the reinforcing member (12) can abut against an inner circumferential surface (11b) of the exterior member (11) in all circumferential directions of the exterior member (11), in which a torsional deformation of the material of the reinforcing member (12) per length (L1) of a portion that comes into contact with a hand gripping the exterior member (11).

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