Handrail

Abstract

To provide a handrail that can be installed with sufficient strength on a framework made of a wooden material.SOLUTION: A handrail comprises a metal post and a metal fastener. The fastener has a reinforcing portion, an embedded portion extending downward from the reinforcing portion, and a connecting portion extending upward from the reinforcing portion. When viewed from the top-bottom direction, the reinforcing portion is thicker than the embedded portion and the connecting portion. The embedded portion and at least a portion of the reinforcing portion are inserted into a pilot hole formed in a body made of a wood material. A filler material is filled into the pilot hole. The embedded portion and the reinforcing portion are fixed to the body as the filler material hardens, and the post is connected to the connecting portion.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a handrail that is installed on a structure made of wood material. [Background technology]

[0002] Traditionally, most mid- to high-rise buildings have been made of reinforced concrete, and metal (such as aluminum) handrails are installed on the balconies and other areas.

[0003] In recent years, new wood materials such as CLT (Cross Laminated Timber) and new connection structures for such materials have been proposed (for example, Patent Document 1), and mid- to high-rise wooden buildings using these technologies have also been proposed. There is also a demand for installing metal handrails on mid- to high-rise wooden buildings, just as in the case of reinforced concrete structures. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-195743 Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional metal handrails are designed to be installed on concrete structures, and there is no precedent for installing them on wooden structures, so there is no established method for installing them in a way that provides sufficient strength.

[0006] The present invention has been made in consideration of the above circumstances, and has an object to provide a handrail that can be installed with sufficient strength on a frame made of wood material. [Means for solving the problem]

[0007] The handrail of the present invention comprises a metal support and a metal fastener, the fastener having a reinforcing portion, an embedded portion extending downward from the reinforcing portion, and a connecting portion extending upward from the reinforcing portion, wherein when viewed from the top-bottom direction, the reinforcing portion is thicker than the embedded portion and the connecting portion, the embedded portion and at least a portion of the reinforcing portion are inserted into pilot holes formed in a body made of a wood material, the pilot holes are filled with a filler material, the embedded portion and the reinforcing portion are fixed to the body as the filler material hardens, and the support is connected to the connecting portion.

[0008] In addition, in the present invention, the embedded portion may be made of a part of a cut-to-size bolt, and the reinforcing portion may be made of the other part of the cut-to-size bolt and a nut screwed into the other part of the cut-to-size bolt. The other part of the cut-to-size bolt that serves as the reinforcing portion may be the whole part of the cut-to-size bolt other than the part that serves as the embedded portion, or may be a part other than the part that serves as the embedded portion. Also, a member (such as a round bar or a square bar) that does not have a thread structure may be integrally formed with the cut-to-size bolt that constitutes the embedded portion and the reinforcing portion, and the member may serve as the connecting portion.

[0009] In the present invention, the diameter of the pilot hole may be larger than the diameter of the embedded portion, and a screw groove may be formed on a side surface of the pilot hole.

[0010] In addition, in the present invention, a plurality of the fasteners may be provided for one of the support pillars, and the plurality of fasteners may be arranged side by side with gaps between them in the prospective direction of the support pillars.

[0011] In the present invention, a portion of the reinforcing portion may protrude upward from an upper surface of the body, and the support pillar may be spaced apart from the upper surface of the body. Effect of the Invention

[0012] According to the present invention, the embedded and reinforcing parts of a metal fixture are embedded in a wooden structure, and a metal post is connected to the connecting part of this fixture, i.e., metal members are joined together. Since the reinforcing parts are thicker than the embedded and connecting parts, the rigidity of the base part of the post is increased, and the handrail can be installed with sufficient strength.

[0013] In addition, if the buried part is made of cut bolts and the reinforcing part is made of cut bolts and nuts, the handrail can be installed inexpensively because they are made of general-purpose materials. Also, since the buried part has a thread and a large surface area, it can be fixed more firmly by the filling material. Furthermore, since the reinforcing part can be formed simply by screwing the nut onto the cut bolt, construction is easy.

[0014] Furthermore, if a thread groove is formed on the side of the pilot hole, the filler hardens while penetrating into the thread groove, so that the embedded portion and the reinforcing portion are more firmly fixed to the main body.

[0015] In addition, if multiple fixing devices are provided for one support and the fixing devices are arranged in a row with spaces between them in the projecting direction of the support, the load acting on the handrail will mainly be in the projecting direction (such as the load when a person touches it or the load caused by the wind), so the load will be distributed and the handrail will be stronger.

[0016] Furthermore, if part of the reinforcing part protrudes upward from the top surface of the body and the support pillar is spaced apart from the top surface of the body, the metal support pillar will not sink into the body made of wood material. [Brief description of the drawings]

[0017] [Figure 1] A longitudinal cross-sectional view of the center axis of the fixed portion of the handrail support. [Diagram 2] FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG. [Diagram 3] FIG. 4 is an exploded perspective view of a fixed portion of the support. [Figure 4] This is an overall perspective view of the handrail. [Diagram 5] FIG. 13 is an explanatory diagram of the construction procedure for erecting the pillars. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The specific details of the handrail of the present invention will be described below. This handrail can be installed and used in various places, but here we will show an embodiment in which it is installed on the balcony of an apartment building to prevent falls. This apartment building is a medium- to high-rise wooden building, and CLT is used as the structural material. In the following, the front-to-back direction is the direction in which the handrail is expected to be seen, with the front side being the outdoor side and the back side being the indoor side. Furthermore, the left-to-right direction is the direction in which the coping of the handrail extends.

[0019] As shown in Fig. 4, this handrail 100 is erected on a structural frame S made of wood material (CLT) and includes multiple (three in the illustrated range) posts 1 lined up at intervals on the left and right. Furthermore, this handrail 100 includes a coping 101 extending left and right that is horizontally installed on the upper end of each post 1, a cross rail 102 extending left and right that is installed on the front side of each post 1 slightly above the structural frame S, a vertical rail 103 that is installed between the coping 101 and the cross rail 102 in a position near the front side of each post 1, and a panel 104 that is fitted into the space surrounded by the coping 101, the cross rail 102, and the vertical rail 103.

[0020] As shown in Figures 1 to 3, the support 1 has a core material 2 fixed to a body S, and a covering material 3 that covers the core material 2 from the outside. Both the core material 2 and the covering material 3 are made of aluminum extruded shapes and extend vertically.

[0021] As shown in FIG. 2, the core material 2 has a cross-sectional outer shape that is approximately rectangular and symmetrical in the front-rear and left-right directions. The core material 2 has a hollow shape that has front and rear core material visible walls 21 and left and right core material projected walls 22 that follow the outer shape. The front-rear length of the core material 2 is approximately three times the left-right length. In addition, two extension pieces 23 are formed on the outer periphery of the left and right core material projected walls 22 so as to protrude toward the outer periphery (left-right direction). In each of the left and right core material projected walls 22, the two extension pieces 23 are arranged at positions slightly toward the center from the front and rear ends of the core material projected walls 22. Furthermore, partition walls 25 extending left and right are formed at two locations on the inner periphery of the core material 2, front and rear. And, the spaces surrounded by the core material visible walls 21, the left and right core material projected walls 22, and the partition walls 25 on the front and rear, respectively, are tapping holes 24. The two tapping holes 24 are disposed at the front end and the rear end on the inner periphery side of the core material 2 .

[0022] As shown in FIG. 2, the covering material 3 has a cross-sectional outer shape that is approximately rectangular and symmetrical in the front-rear and left-right directions. The covering material 3 has a hollow shape with front and rear covering material visible walls 31 and left and right covering material projection walls 32 that follow the outer shape. The front-rear length of the covering material 3 is approximately twice the left-right length. In addition, two protrusions 33 are formed on the inner periphery of the front and rear covering material visible walls 31 so as to protrude inward (front-rear direction). In each of the front and rear covering material visible walls 31, the two protrusions 33 are arranged at positions that divide the covering material visible wall 31 into approximately three equal parts on the left and right. Furthermore, two tapping holes 34 are formed on the inner periphery of the left and right covering material projection walls 32 so as to protrude inward (left-right direction). In each of the left and right covering material projection walls 32, the two tapping holes 34 are arranged at the front end and rear end of the covering material projection wall 32.

[0023] As shown in FIG. 1, the vertical length of the covering material 3 is longer than the vertical length of the core material 2. The covering material 3 covers the core material 2 from the outside. That is, the core material 2 is housed on the inner periphery side of the covering material 3. The core material 2 is located at the lower end of the inner periphery side of the covering material 3. However, the lower end of the covering material 3 is located slightly above the lower end of the core material 2. As shown in FIG. 2, the front and rear core material facing walls 21 of the core material 2 abut against the protrusions 33 formed on the front and rear covering material facing walls 31 of the covering material 3. In addition, the four extension pieces 23 of the core material 2 are respectively located on the central side in the front-rear direction with respect to the four tapping holes 34 of the covering material 3. As shown in FIG. 1 and FIG. 2, the covering material 3 and the core material 2 are fixed by screwing. The screw 35 for this screwing penetrates the covering material facing wall 31 of the covering material 3 and is screwed into the core material facing wall 21 of the core material 2.

[0024] As shown in Fig. 1 and Fig. 3, a fixing device 4 is attached to the lower end of the support 1. The fixing device 4 has a reinforcing portion 6, an embedded portion 5 extending downward from the reinforcing portion 6, and a connecting portion 7 extending upward from the reinforcing portion 6. The embedded portion 5, the reinforcing portion 6, and the connecting portion 7 are all made of steel. Here, two fixing devices 4 are provided for one support 1. Note that Fig. 3 shows each component disassembled for the purpose of explanation, but in this embodiment, the connecting portion 7 of the fixing device 4 is inserted in advance into the tapping hole 24 of the core material 2, and is structured so as to be inseparable.

[0025] The buried part 5 and the connection part 7 are different parts of one cut bolt B. The cut bolt B extends vertically. A nut N is screwed onto the cut bolt B and is located in the vertical center of the cut bolt B. The reinforcing part 6 is made up of the nut N and a part of the cut bolt B that screws onto the nut N. In the cut bolt B, the lower part of the reinforcing part 6 (nut N) is the buried part 5, and the upper part of the reinforcing part 6 is the connection part 7. Therefore, it can be said that the buried part 5 is made up of a part of the cut bolt B, and the reinforcing part 6 is made up of the other part of the cut bolt B and the nut N screwed into the other part of the cut bolt B. However, the other part of the cut bolt B that becomes the reinforcing part 6 is a part other than the part of the cut bolt B that becomes the buried part 5, and the other part other than the part of the cut bolt B that becomes the buried part 5 is the connection part 7. In addition, the reinforcing part 6 is thicker than the buried part 5 and the connection part 7 when viewed from the vertical direction.

[0026] The connection parts 7 of the two fasteners 4, each consisting of a cut bolt B, are fitted into the front and rear tapping holes 24 of the core material 2 of the support 1. The entire length of the connection part 7 is contained within the inner circumference of the core material 2, and the upper end face of the reinforcing part 6 (nut N) abuts against the lower end face of the core material 2. This connects the support 1 and the fasteners 4 (connection parts 7), and the two fasteners 4 are arranged side by side with a gap between them in the projection direction (front-to-back direction) of the support 1.

[0027] As shown in Figures 1 and 3, pilot holes 8 are formed in the top surface of a structure S made of wood material (CLT). The pilot holes 8 are for erecting supports 1. Two pilot holes 8 are formed for one support 1, and their positions correspond to the two fasteners 4 connected to the support 1. In other words, the two pilot holes 8 are arranged side by side with a gap between them in the prospective direction (front-to-back direction) of the support 1.

[0028] The pilot hole 8 has a circular cross section and is a hole extending downward from the upper surface of the body S. The pilot hole 8 is composed of a lower pilot hole 81 on the lower side (rear side) and an upper pilot hole 82 on the upper side (opening side).

[0029] The vertical length (depth) of lower pilot hole 81 is longer than the vertical length of upper pilot hole 82 and slightly shorter than the vertical length of embedded portion 5. The diameter of lower pilot hole 81 is larger than the diameter of embedded portion 5 and smaller than the diameter of reinforcing portion 6. A screw groove 83 is formed on the side of lower pilot hole 81 over the entire vertical length. However, the pitch of screw groove 83 is larger than the pitch of the thread formed on embedded portion 5 (cut bolt B). Therefore, embedded portion 5 does not screw into lower pilot hole 81.

[0030] The vertical length of the upper pilot hole 82 is slightly shorter than the vertical length of the reinforcing portion 6. The diameter of the upper pilot hole 82 is larger than the diameter of the reinforcing portion 6.

[0031] As shown in FIG. 1, the embedded portion 5 and a part of the lower side of the reinforcing portion 6 are inserted into the pilot hole 8. The lower end surface (tip surface) of the embedded portion 5 abuts against the lower end surface (bottom surface) of the lower pilot hole 81, and most of the entire length of the embedded portion 5 is contained in the lower pilot hole 81. However, since the vertical length of the lower pilot hole 81 is slightly shorter than the vertical length of the embedded portion 5, a part of the upper side of the embedded portion 5 protrudes from the lower pilot hole 81 and is located inside the upper pilot hole 82. A part of the lower side of the reinforcing portion 6 is contained in the upper pilot hole 82. However, there is a gap between the lower end of the reinforcing portion 6 and the lower end of the upper pilot hole 82. And a part of the upper side of the reinforcing portion 6 (the part not contained in the upper pilot hole 82) protrudes upward from the upper surface of the structure S. Therefore, the support 1 located above the reinforcing portion 6 is separated from the upper surface of the structure S.

[0032] The pilot holes 8 are filled with a filler 9. The filler 9 is made of epoxy resin mixed with glass fiber. The filler 9 fills the gaps between the embedded portion 5 and the reinforcing portion 6 and the pilot holes 8 (lower pilot holes 81 and upper pilot holes 82). In other words, the threads of the embedded portion 5 (cut bolt B) and the thread groove 83 on the side of the lower pilot hole 81 are filled with the filler 9. As the filler 9 hardens, the embedded portion 5 and the reinforcing portion 6 are fixed to the frame S.

[0033] Here, the construction procedure for erecting the support 1 will be described with reference to FIG. 5. As shown in (a), the upper parts of two cut bolts B are inserted into the tapping holes 24 of the core material 2 in advance at the factory, and the core material 2 and the cut bolts B are integrated. In addition, pilot holes 8 are formed in the body S. A lower pilot hole 81 and an upper pilot hole 82 are formed, and further, the lower pilot hole 81 is threaded using a lag screw bolt or the like to form a screw groove 83. Next, as shown in (a) to (b), a nut N is screwed into the cut bolt B to form the fixing device 4 (embedded part 5, reinforcing part 6, connecting part 7). Next, as shown in (b), the filling material 9 is filled into the pilot hole 8. At this time, the amount of the filling material 9 is adjusted so that the filling material 9 does not overflow from the pilot hole 8 in anticipation of inserting the embedded part 5 and reinforcing part 6 of the fixing device 4 into the pilot hole 8 later. Next, as shown in (b) to (c), before the filling material 9 hardens, the embedded portion 5 and reinforcing portion 6 of the fixing device 4 are inserted into the pilot hole 8. Then, the core material 2 is held in this state and the filling material 9 is allowed to harden. This fixes the core material 2 to the structure S. Next, as shown in (c) to (d), the covering material 3 is placed over the outside of the core material 2. Next, as shown in (d), screws 35 are driven from the projection direction (front-to-back direction) of the covering material 3, and the covering material 3 and the core material 2 are screwed together to fix them. In this manner, the support 1 is erected.

[0034] Then, the handrail 100 is constructed by attaching the coping 101, cross rails 102, vertical rails 103, and panels 104 to the multiple posts 1 thus erected. At this time, each component may be attached to the post 1 in order, or each component may be assembled first and then attached to the post 1. In this manner, the handrail 100 is erected on the frame S.

[0035] According to the handrail of the present invention configured in this way, the embedded part 5 and reinforcing part 6 of the steel fixing device 4 are embedded in the frame S made of wood material (CLT), and the core material 2 of the aluminum support 1 is connected to the connection part 7 of this fixing device 4, that is, the metal members are joined together. And, since the reinforcing part 6 is thicker than the embedded part 5 and the connection part 7, the rigidity of the base part of the support 1 is high, and the handrail 100 can be installed with sufficient strength. Also, since the embedded part 5 is made of the cut bolt B, and the reinforcing part 6 is made of the cut bolt B and the nut N, it is possible to install the handrail 100 at a low cost because it is made of a general-purpose material. Also, since the embedded part 5 has a thread and has a large surface area, it is fixed more firmly by the filling material 9. Furthermore, since the reinforcing part 6 can be formed just by screwing the nut N into the cut bolt B, construction is easy. In addition, since a screw groove 83 is formed on the side of the pilot hole 8, the filling material 9 hardens while penetrating the screw groove 83, so that the embedded part 5 and the reinforcing part 6 are more firmly fixed to the body S. At this time, the hardened filling material 9 becomes a male screw and is in a state of being screwed into the screw groove 83. In addition, two fixing devices 4 are provided for one support 1, and the fixing devices 4 are arranged side by side with a gap between them in the projection direction of the support 1. Since the load acts mainly in the projection direction on the handrail 100 (load when a person touches it, load due to wind, etc.), the load is distributed and the strength is higher. In addition, a part of the reinforcing part 6 protrudes upward from the top surface of the body S, and the support 1 is separated from the top surface of the body S, so that the aluminum support 1 does not sink into the body S made of wood material.

[0036] The present invention is not limited to the above embodiment, and the shape and structure of each part can be appropriately changed within the scope of the invention, taking into consideration the situation of the installation location and the design. For example, the number of posts is not limited. The number of posts may be small and the handrail may be shorter in the left and right directions, or the number of posts may be large and the handrail may be longer in the left and right directions. In addition, the fixing device may be one in which the embedded part, the reinforcing part, and the connecting part are all integrally formed, or one in which some are integral and the others are formed separately, or one in which all are formed separately. For example, in the fixing device of the above embodiment, the connecting part may be made of a round bar without a thread. Furthermore, the construction procedure of the posts and handrail is one example, and construction may be performed in a different procedure. In addition, the framework may be made of a wood material other than CLT. [Explanation of symbols]

[0037] 1 post 4 Fixtures 5 Buried section 6 Reinforcement 7 Connection 8 Pilot hole 83 Thread groove 9 Filling material B Cut bolt N Nut S frame

Claims

1. Equipped with metal supports and metal fasteners, the fixing device has a reinforcing portion, an embedded portion extending downward from the reinforcing portion, and a connecting portion extending upward from the reinforcing portion, When viewed from above and below, the reinforcing portion is thicker than the embedded portion and the connecting portion, The embedded portion and at least a part of the reinforcing portion are inserted into a pilot hole formed in a body made of a wood material, A filler is filled in the pilot hole, and the embedded portion and the reinforcing portion are fixed to the body by hardening the filler, A handrail, characterized in that the support is connected to the connection part.

2. The embedded portion is made of a part of a cut bolt, 2. The handrail according to claim 1, characterized in that the reinforcing portion comprises the other portion of the cut bolt and a nut screwed into the other portion of the cut bolt.

3. 2. The handrail according to claim 1, characterized in that the diameter of the pilot hole is larger than the diameter of the embedded portion, and a screw groove is formed on the side of the pilot hole.

4. A plurality of the fixing devices are provided for one of the support columns, The handrail according to claim 1, characterized in that the multiple fixing devices are arranged side by side at intervals in the prospective direction of the support post.

5. A part of the reinforcing portion protrudes upward from an upper surface of the body, A handrail as claimed in any one of claims 1 to 4, characterized in that the support post is spaced apart from the upper surface of the body.

Images