Method for supporting fasteners and components

Abstract

To provide a fixture capable of stably and firmly suspending and supporting a heavy load from a wooden member.SOLUTION: A fixture 3 fixes a hanging bolt 5 to a ceiling member 2. The fixture 3 includes a fixture body 10 to which the hanging bolt 5 is attached, and a pair of inclined portions 20A and 20B provided on both sides of the fixture body 10 and inclined with respect to the ceiling member 2. The pair of inclined portions 20A, 20B are inclined with respect to fixture body 10, and through holes 21A, 21B through which screws 4A, 4B are inserted are formed in the pair of inclined portions 20A, 20B, respectively.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a fixture for fixing a bolt to a wooden member and a method for supporting a member using this fixture.

Background Art

[0002] Conventionally, fixtures for attaching other members to wooden members have been proposed (see Patent Document 1). Patent Document 1 shows a ceiling hanger including a mounting plate fixed to a beam between upper and lower floors of a wooden building, and a strip metal suspended from this mounting plate via a vibration isolator to support a field edge. The mounting plate is formed of a long hole or a notch, and is provided with an assembly portion including a receiving portion and a fitting portion communicating with this. The vibration isolator is provided with a plurality of fitting portions that are selectively fitted into the fitting portion through the receiving portion of the assembly portion arranged in the vertical direction.

[0003] Patent Document 2 shows a flat-shaped bracket that is fixed to a pillar on one side and to a horizontal member or a base on the other side using fastening rods such as nails or bolts. A protruding piece to be sandwiched between the pillar and the horizontal member or the base is provided in the middle of the main body plate of this bracket. Patent Document 3 shows a hanging fixture for a wooden material including an embedded plate portion and a hanger portion. The embedded plate portion and the hanger portion are straight or bent.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] The objective is to provide a fastening device and a method for supporting wooden members that can stably and firmly suspend and support heavy objects from wooden members. [Means for solving the problem]

[0006] The fastener of the first invention (for example, fastener 3 described later) is a fastener for fixing a suspension member (for example, suspension bolt 5 described later) to a wooden member (for example, ceiling member 2 described later), and comprises a fastener body (for example, fastener body 10 described later) to which the suspension member is attached, and a pair of inclined parts (for example, inclined parts 20A, 20B described later) provided on both sides of the fastener body and inclined with respect to the wooden member, wherein the pair of inclined parts are inclined with respect to the fastener body, and each of the pair of inclined parts has a through hole (for example, through hole 21A, 21B described later) through which a fastener is inserted.

[0007] According to this invention, since the inclined portion with through holes is inclined relative to the wooden member, the fastener can be driven in at an angle to the surface of the wooden member without the need for any additional auxiliary tools, by driving the fastener in approximately perpendicular to the surface of the inclined portion. Therefore, when the fixing device of the present invention is attached to the underside of a wooden member such as a ceiling, and a heavy object is suspended from this fixing device via a suspension member, a vertical force acts on the fixing device. As components of this vertical force, the fastener is subjected to an axial pull-out force and a force that attempts to bend the fastener in a direction perpendicular to its axial direction. As a result, the fastener resists bending, preventing a brittle failure mode of the fastener, and allowing the heavy object to be stably and firmly suspended and supported from the wooden member.

[0008] The fastener of the second invention is characterized in that the fastener body comprises a flat plate portion (for example, the flat plate portion 11 described later) and a suspension member joining portion (for example, the female screw portion 13 described later) provided on the flat plate portion to which the suspension member is joined, and the through holes formed in the pair of inclined portions are each elongated holes extending from the inclined portion to the flat plate portion, or circular holes provided in the inclined portion, and are arranged on opposite sides of the suspension member joining portion in a plan view.

[0009] According to this invention, when the through-hole formed in the inclined portion of the fastener is an elongated hole, the driving position can be appropriately adjusted when inserting and driving in the fastener through the through-hole. Specifically, by making the shape of the through-hole an elongated hole, it is possible to tilt the fastener relatively easily after inserting it through the through-hole, and the fastener can be easily driven into the wooden member at an angle. Furthermore, by arranging a pair of through holes on opposite sides of the suspension joint in a plan view, and driving multiple fasteners inserted through the through holes into the wooden member, the movement of the fasteners can be prevented.

[0010] The third invention is a method for supporting a member, which suspends and supports a member (for example, member 6 described later) from a wooden member, and is characterized by comprising the steps of: placing the above-mentioned fastener on the wooden member (for example, steps S1 and S2 described later); attaching the fastener to the wooden member by inserting a connector through the through holes of a pair of inclined portions of the fastener and driving the connector in at an angle to the wooden member (for example, step S3 described later); and attaching the suspension member to the fastener and connecting the member to the suspension member (for example, step S4 described later).

[0011] Examples of components include ceiling finishing materials, braces, CLT panels, and equipment. According to this invention, since the inclined portion with through holes is inclined relative to the wooden member, the fastener can be driven in at an angle to the surface of the wooden member without the need for any additional auxiliary tools, by driving the fastener in approximately perpendicular to the surface of the inclined portion. Moreover, by attaching a member to the suspension member attached to the fixture, a ceiling structure and a brace structure can be realized.

Effects of the Invention

[0012] According to the present invention, it is possible to provide a fixture and a method for supporting a member that can stably and firmly suspend and support a heavy object from a wooden member.

Brief Description of the Drawings

[0013] [Figure 1] It is a longitudinal sectional view of a ceiling structure according to a first embodiment of the present invention. [Figure 2] It is a plan view of a fixture constituting a ceiling structure. [Figure 3] It is a view taken along the line A-A of the fixture in FIG. 2. [Figure 4] It is a perspective view of the fixture in FIG. 2. [Figure 5] It is a schematic diagram for explaining the force acting on the fixture. [Figure 6] It is a flowchart of a procedure for suspending a member from a ceiling member. [Figure 7] It is a diagram showing a list of test specimens and test results used in a tensile test of a fixture. [Figure 8] It is a diagram showing the test results of a tensile test of a fixture. [Figure 9] It is a longitudinal sectional view of a fixture according to a second embodiment of the present invention. [Figure 10] It is a plan view of a fixture according to a third embodiment of the present invention. [Figure 11] It is a flowchart of a procedure for attaching a fixture according to the third embodiment to a ceiling member. [Figure 12] It is an explanatory diagram of a procedure for attaching a fixture according to the third embodiment to a ceiling member.

Modes for Carrying Out the Invention

[0014] Embodiments of the present invention will be described below with reference to the drawings. In the following description of embodiments, identical components will be denoted by the same reference numerals, and their descriptions will be omitted or simplified. [First Embodiment] The present invention relates to a fastener for fixing a suspension member to a wooden member (e.g., a ceiling member, a CLT board), and a method for supporting a member (e.g., a ceiling member, a brace, a CLT board, equipment) using the fastener. The fastener comprises a fastener body to which the suspension member is attached, and a pair of inclined parts provided on both sides of the fastener body and inclined with respect to the wooden member. Figure 1 is a longitudinal cross-sectional view of a ceiling structure 1 according to the first embodiment of the present invention. The ceiling structure 1 comprises a fastener 3 positioned on the underside of a ceiling member 2, which is a wooden member; a pair of screws 4A and 4B, which are fasteners for fixing the fastener 3 to the ceiling member 2; a suspension bolt 5, which is a suspension member attached to the fastener 3; and a member 6 attached to the lower end of the suspension bolt 5. The member 6 is, for example, a ceiling finishing material, a brace, a CLT board, or equipment.

[0015] Figure 2 is a plan view of the fastener 3. Figure 3 is a view of the fastener 3 in Figure 2, taken along arrow AA. Figure 4 is a perspective view of the fastener 3 in Figure 2. The fastener 3 is for fixing the suspension bolt 5 to the underside of the wooden ceiling member 2. The fastener 3 comprises a fastener body 10 into which the suspension bolt 5 is screwed, and a pair of inclined parts 20A and 20B provided on both sides of the fastener body 10 and fixed to the ceiling member 2 with screws 4A and 4B.

[0016] The fixing device body 10 comprises a flat plate portion 11 positioned substantially parallel to the surface of the ceiling member 2 and having a through hole 12 formed in the center, and a female threaded portion 13 attached to the through hole 12 of the flat plate portion 11 as a suspension member joint. A suspension bolt 5 can be screwed into the female threaded portion 13. As shown in Figures 4 and 5, the pair of inclined portions 20A and 20B extend at a predetermined angle θ1 relative to the flat plate portion 11 of the fastener body 10. Therefore, the pair of inclined portions 20A and 20B are inclined at a predetermined angle θ1 relative to the surface of the ceiling member 2. Through holes 21A and 21B are formed in the pair of inclined portions 20A and 20B, through which screws 4A and 4B are inserted. The pair of through holes 21A and 21B are elongated holes and extend from the inclined portions 20A and 20B to the flat plate portion 11 of the fastener body 10. In a plan view, these pair of through holes 21A and 21B are arranged symmetrically with respect to the female screw portion 13 of the fastener body 10. The flat plate portion 11 and the pair of inclined portions 20A and 20B of the fixing device body 10 are formed by bending a single sheet of steel or stainless steel, and in a side view, they have a convex shape with a protruding central portion.

[0017] Screws 4A and 4B are inserted through holes 21A and 21B and driven in approximately perpendicularly to the surfaces of inclined portions 20A and 20B. As a result, the screw-in angle of screws 4A and 4B is θ2. The sum of this screw-in angle θ2 and the angle θ1 of the fixing body 10 relative to the flat plate portion 11 is 90°. Screws 4A and 4B are arranged symmetrically with respect to the female thread portion 13 in a plan view, and are facing each other.

[0018] When the member 6 is suspended from the suspension bolt 5, a vertical load acts on the fastener 3. Then, as shown in Figure 5, two components of force, a pull-out force and a bending force, act on each of the two screws 4A and 4B.

[0019] The procedure for supporting components 6, such as ceiling finishing materials, braces, and equipment, from ceiling component 2 will be explained below with reference to the flowchart in Figure 6. In step S1, pilot holes are formed in the underside of the ceiling member 2 for driving in screws 4A and 4B. These pilot holes serve as guides, making it easier to tilt the screws 4A and 4B relative to the underside of the ceiling member 2 and to drive them in. In step S2, the fastener 3 is placed on the underside of the ceiling member 2. In step S3, screws 4A and 4B are inserted through the through holes 21A and 21B of the pair of inclined portions 20A and 20B of the fastener 3, and the screws 4A and 4B are driven in at an angle relative to the ceiling member 2, using the pre-drilled holes as guides, thereby attaching the fastener 3 to the ceiling member 2. In step S4, the suspension bolt 5 is attached to the female threaded portion 13 of the fastener 3, the member 6 is connected to the suspension bolt 5, and the member 6 is suspended and supported from the ceiling member 2.

[0020] [Tensile test of fasteners] Below, we fabricated test specimens with the same shape as the aforementioned fasteners and performed tensile tests by applying tensile force. As shown in Figure 7, we fabricated two test specimens in which the flat plate portion and a pair of inclined portions of the fastener body were made from 1.6 mm steel plate, and two test specimens in which the flat plate portion and a pair of inclined portions were made from 2.3 mm steel plate. These test specimens were fixed with screws, and suspension bolts were attached to the female threaded parts. A tensile load was then applied to these suspension bolts, and their vertical displacement was recorded.

[0021] The results are shown in Figures 7 and 8. Figure 7 shows the experimental values ​​for each test specimen. Specifically, the experimental values ​​are the yield strength Py, the vertical displacement δy at the yield strength, the maximum load-bearing capacity Pmax, and the vertical displacement δ(Pmax) at the maximum load-bearing capacity. In Figure 8, the vertical axis represents the tensile load applied to the test specimen by pulling the suspension bolts attached to the specimen, and the horizontal axis represents the vertical displacement of the specimen. From Figure 8, it was confirmed that when the main body is made of 1.6 mm steel plate, the rigidity is lower, but the maximum displacement is larger compared to when the main body is made of 2.3 mm steel plate.

[0022] Each fastener requires a strength of 1.2 kN. As shown in Figures 7 and 8, the No. 1 and No. 2 test specimens, made of 1.6 mm thick steel plates, exhibited a maximum load-bearing capacity Pmax approximately 3.3 times higher than this required strength. Furthermore, the No. 3 and No. 4 test specimens, made of 2.3 mm thick steel plates, showed higher maximum load-bearing capacity compared to the No. 1 and No. 2 test specimens, made of 1.6 mm thick steel plates. Therefore, these test results demonstrate that the fasteners of the present invention can stably suspend and support heavy objects from wooden members.

[0023] This embodiment provides the following effects. (1) Since the inclined portions 20A and 20B, which are provided with through holes 21A and 21B, are inclined with respect to the ceiling member 2, screws 4A and 4B can be driven in at an angle to the surface of the ceiling member 2 by driving them in approximately perpendicular to the surface of these inclined portions 20A and 20B without the use of any additional auxiliary tools. Therefore, when a fastener 3 is attached to the underside of the ceiling member 2 and a heavy object is suspended from this fastener 3 via a suspension bolt 5, a vertical force acts on the fastener 3. As components of this vertical force, screws 4A and 4B are subjected to an axial pull-out force and a force that attempts to bend screws 4A and 4B in a direction perpendicular to their axial direction. As a result, screws 4A and 4B resist bending, preventing the screws 4A and 4B from failing in a brittle manner, and allowing heavy objects to be stably and firmly suspended and supported from the ceiling member 2. Specifically, by driving screws 4A and 4B into the ceiling member 2 through through holes 21A and 21B provided in the inclined portions 20A and 20B of the fastener 3, the screws 4A and 4B are not subjected to tensile axial force as long-term stress. Instead, the screws 4A and 4B deform in a bending manner to resist bending, thus preventing brittle fracture of the fastener 3.

[0024] (2) Since the inclined sections 20A and 20B are made of steel or stainless steel, the inclined sections 20A and 20B have higher rigidity than the wood-based ceiling member 2, and the tip portions of the inclined sections 20A and 20B bite into the ceiling member 2, thereby suppressing the movement of the inclined sections 20A and 20B. (3) The through holes 21A and 21B formed in the inclined portions 20A and 20B of the fastener 3 are elongated, so that when inserting and driving in the screws 4A and 4B through the through holes 21A and 21B, the driving position can be adjusted as appropriate. Specifically, by making the shape of the through holes 21A and 21B elongated, after inserting the screws 4A and 4B through the through holes 21A and 21B, it is possible to tilt the screws 4A and 4B relatively easily, and the screws 4A and 4B can be easily driven into the ceiling member 2 at an angle. Furthermore, since the pair of through holes 21A and 21B are positioned on opposite sides of the female threaded portion 13 in a plan view, the screws 4A and 4B inserted through the through holes 21A and 21B are driven into the ceiling member 2, so even if a heavy object is suspended from the suspension bolt 5 and a torsional force acts on the fixing device 3, this torsional force can be resisted. In addition, the multiple screws 4A and 4B driven into the ceiling member 2 prevent the fixing device 3 from moving.

[0025] [Second Embodiment] Figure 9 is a longitudinal cross-sectional view of the fastener 3A according to the second embodiment of the present invention. In this embodiment, the folded portions 22A and 22B are provided on the inclined portions 20A and 20B, which is different from the first embodiment. Specifically, by bending a single steel plate, the folded portions 22A and 22B are formed in addition to the flat plate portion 11 and the pair of inclined portions 20A and 20B of the fixing device body 10. According to this embodiment, the same effects as those described in (1) to (3) above are obtained.

[0026] [Third Embodiment] Figure 10 is a plan view of the fixing device 3B according to the third embodiment of the present invention. In this embodiment, the through holes 21A and 21B provided in the inclined portions 20A and 20B are circular, and a pair of temporary fixing through holes 23A and 23B are provided in the flat portion 11 of the fixing device body 10. Through hole 23A is provided near through hole 21A, and through hole 23B is provided near through hole 21B. Furthermore, these temporary fixing through holes 23A and 23B are arranged symmetrically with respect to the female screw portion 13 of the fixing device body 10 in a plan view.

[0027] The procedure for attaching the above-mentioned fastener 3B to the ceiling member 2 will be explained with reference to the flowchart in Figure 11. In step S11, as shown in Figure 12, a temporary fixing screw 24 is inserted through a temporary fixing through hole 23A provided in the flat plate portion 11 of the fixing device 3B, and this temporary fixing screw 24 is driven vertically into the lower surface of the ceiling member 2. As a result, the fixing device 3B is temporarily fixed to the lower surface of the ceiling member 2. In step S12, as shown in Figure 12, the fixing screw 4B is inserted through the through hole 21B provided in the inclined portion 20B of the fixing device 3B, and the screw 4B is driven in at an angle to the lower surface of the ceiling member 2. At this time, the fixing device 3B is temporarily fixed to the lower surface of the ceiling member 2 by the temporary fixing screw 24, so that the angle and position of the screw 4B do not shift. In step S13, remove the temporary fixing screw 24. In step S14, the fixing screw 4A is inserted through the through hole 21A provided in the inclined portion 20A of the fixing device 3B, and the screw 4A is driven in at an angle to the lower surface of the ceiling member 2. At this time, since the fixing device 3B is already fixed to the lower surface of the ceiling member 2 by the screw 4B, it is possible to prevent the angle and position of the screw 4A from shifting. According to this embodiment, the same effects as those described in (1) to (3) above are obtained.

[0028] Furthermore, the present invention is not limited to the embodiments described above, and any modifications, improvements, etc., that can achieve the objectives of the present invention are included within the scope of the present invention.

[0029] Furthermore, in the above-described embodiment, the fastener 3 was directly attached to the ceiling member 2, which is a wooden member. However, the invention is not limited to this, and a ceiling finishing material (for example, gypsum board, ceiling panel) may be attached to the underside of the ceiling finishing material, and the fastener 3 may be placed on the underside of the ceiling finishing material in this state and then fixed to the ceiling member 2. Furthermore, in the above-described embodiment, the fastener 3 was attached to the ceiling member 2, which is a wooden member, but the invention is not limited to this, and the fastener may also be attached to the CLT board, which is a wooden member. Alternatively, the fastener 3 may be used to support a brace or a CLT board as member 6. Furthermore, in the above-described embodiment, a single through-hole 21A, 21B is provided in each of the inclined portions 20A, 20B symmetrically with respect to the female thread portion 13 of the fixing device body 10. However, the invention is not limited to this, and multiple through-holes may be provided in each of the inclined portions. [Explanation of Symbols]

[0030] 1…Ceiling structure 2…Ceiling components (wooden components) 3, 3A, 3B…Fixing devices 4A, 4B... Screws (fasteners) 5... Suspension bolts (suspension material) 6... Components 10…Body of the fixing device 11…Flat plate section 12…Through hole 13…Female threaded section (hanging material connection section) 20A, 20B... Inclined section 21A, 21B... Through hole 22A, 22B... Folded section 23A, 23B... Through holes 24... Screws for temporary fixing

Claims

1. A fastening device for securing a hanging member to a wooden member, The fixing device body to which the aforementioned suspension material is attached, The fixing device body comprises a pair of inclined portions, The pair of inclined portions are provided on opposite sides of the fixing body in a plan view, and are inclined with respect to the fixing body and the wooden member in a side view. The fixing device body comprises a flat plate portion and a suspension member joining portion provided on the flat plate portion to which the suspension member is joined, Each of the pair of inclined portions has a through hole through which a fastener is inserted. The fastener is characterized in that the through holes formed in the pair of inclined portions are either elongated holes extending from the inclined portion to the flat plate portion, or circular holes provided in the inclined portion.

2. A method for supporting a member by suspending and supporting another member from a wooden member, The steps include: placing the fastener described in claim 1 on the wooden member; The process of attaching the fastener to the wooden member involves inserting the fastener through the through holes of the pair of inclined portions of the fastener and driving the fastener into the wooden member at an angle, A method for supporting a member, characterized by comprising the steps of attaching the suspension member to the fixing device and connecting the member to the suspension member.

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