Safety fence and method for installing the safety fence

Abstract

To ensure worker safety without hindering the constructability of wall structures or reducing work efficiency, and to enable quick and rapid attachment and detachment to concrete members. [Solution] The first fixing members 6a, 6b and the second fixing members 9a, 9b are detachably attached to the concrete members 1a, 1b, and the first single pipe 3 is fastened perpendicularly to the first fixing members 6a, 6b with the first single pipe clamps 4a, 4b, and the second single pipe 7 is fastened perpendicularly to the second fixing members 9a, 9b with the second single pipe clamps 8a, 8b. The first fixing members 6a, 6b have metal heads that fit onto the heads of the hanging brackets, while their base ends extend in a direction approximately perpendicular to the wall surfaces 13a, 13b. The second fixing jigs 9a, 9b are connected to the connecting brackets in a superimposed and linear manner.

Description

Technical Field

[0001] The present invention relates to a safety fence and a method for installing the safety fence. More specifically, the present invention relates to a safety fence that is attached for fall prevention when assembling a wall body using concrete members at a construction site or the like, and a method for installing the safety fence for attaching the safety fence.

Background Art

[0002] Conventionally, when forming a wall body on a slope of embankment using precast concrete members, a reinforcing earth wall construction method is widely known in which reinforcing materials such as steel strips, geotextiles, and anchors are laid in multiple layers in the embankment, and the concrete members and the reinforcing materials are connected to reinforce the embankment.

[0003] For example, Non-Patent Document 1 describes an outline of the Tailalme method, which is a typical reinforcing earth wall construction method.

[0004] In this Non-Patent Document 1, a connecting fitting having a connective hole is projected on one wall surface of a precast concrete member and transported to a construction site. These concrete members are arranged in a staggered manner, while a strip-shaped reinforcing material called a strip and the connecting fitting are connected by fastening members (bolts and nuts), thereby generating a large frictional force between the reinforcing material and the embankment to restrain the movement of the embankment and reinforce the wall body.

[0005] Since this concrete member usually has a large weight of several hundred kilograms, it is necessary to transport it using a large machine such as a crane. For this reason, recesses are provided at predetermined positions on the surface of the concrete member, and a hanging fitting called a D-ha anchor is vertically embedded in the recesses. The concrete member is lifted by a crane or the like using this hanging fitting, and these concrete members are transported to a predetermined position to assemble the wall body. Conventionally, from the viewpoint of ensuring the safety of workers, a fall prevention fence is provided when assembling the wall body.

[0006] Figure 14 shows an example of a conventional fall prevention fence used when assembling a wall structure.

[0007] In other words, as described in Non-Patent Document 1, this type of wall structure uses full-size concrete members and half-size concrete members, with the full-size concrete members arranged in a staggered pattern, and the half-size concrete members placed on top, and the embankment is shaped and formed so that the crest of the slope is generally horizontal.

[0008] When assembling the wall structure on-site, a large opening 102 (for example, 1500 mm vertically and 1500 mm horizontally) is formed between concrete members 101a and 101b, as shown in Figure 14. Conventionally, a single pipe 104 was placed on the upper end surface of concrete members 101a and 102b to prevent workers from falling through the opening 102. Specifically, the heads of hanging fittings embedded in recesses 105a and 105b of concrete members 101a and 101b were fixed to hemispherical jigs 106a and 106b, and single pipe clamps 107a and 107b were attached to the jigs 106a and 106b. Then, the single pipe 104 was horizontally placed between concrete members 102a and 102b, thereby preventing workers from falling through the opening 102 of concrete members 101a and 101b.

[0009] Furthermore, although not shown in the diagram, the opening 102 also has a large vertical space, and from the standpoint of ensuring safety, it is required to provide a middle rail (horizontal rail) in the opening 102. Conventionally, for example, the connective attached to the connecting fitting and the single pipe were secured with binding wire or the like to ensure the safety of the workers. [Prior art documents] [Non-patent literature]

[0010] [Non-Patent Document 1] "Tail Armée Construction Method" (General Catalog), [online], May 2020, JFE Shoji Tail One Co., Ltd., [Retrieved September 20, 2025], Internet <URL:https: / / www.terrearmee.com / wjfep / wp-content / uploads / 2020 / 05 / 064cd78e89908a62053a71696d9444e0.pdf> [Overview of the project] [Problems that the invention aims to solve]

[0011] However, conventionally, as described above, a single pipe 104 is installed on the upper end surface of the concrete members 101a and 101b to prevent workers from falling through the opening 102. However, when installing a new concrete member inside the opening 102, the single pipe 104 gets in the way, so it is necessary to remove the single pipe 104 before installing the new concrete member. In other words, with the conventional method, the single pipe 104 for fall prevention had to be removed from the concrete members 101a and 101b when installing the new concrete member, which is the most dangerous part of the process, and sufficient safety could not be ensured.

[0012] Moreover, the jigs 106a and 106b described above, which are placed on the upper end surfaces of the concrete members 101a and 101b, are often hemispherical pressed products, which are weak in strength and have poor durability.

[0013] Furthermore, even when a crossbar was installed in the opening using single-pipe scaffolding, the scaffolding was merely secured with wire or similar means. Attaching and detaching the scaffolding from the concrete members required considerable effort and skill, making it impossible to complete the process quickly and resulting in poor work efficiency.

[0014] The present invention has been made in view of these circumstances, and aims to provide a safety fence and a method for attaching the safety fence that can ensure the safety of workers without hindering the constructability of wall construction or causing a decrease in work efficiency, and that can be attached to and detached from concrete members quickly in a short amount of time. [Means for solving the problem]

[0015] To achieve the above objective, the safety fence according to the present invention is a safety fence that is attached to a wall body assembled using these concrete members, and is provided with a plurality of concrete members having connecting fittings formed in holes for connecting reinforcing members protruding from one wall surface and a hanging fitting with a rotatable head embedded vertically, and is attached when the wall body is assembled, and comprises a first fixing member having a cylindrical member whose tip is fitted into the head and which extends in a direction substantially perpendicular to the one wall surface and a first fastening member provided at the base end of the cylindrical member, and a second fixing member having a mounting base that is superimposed and linearly connected to the connecting fitting and a second fastening member connected to the mounting base, wherein the first and second fixing members are detachably attached to each of the plurality of concrete members and are provided to span horizontally between one concrete member and another concrete member among the plurality of concrete members ni The tubular members 1 and 2 are each It is characterized by being detachably attached via the first and second fastening members.

[0016] Furthermore, the safety fence of the present invention is characterized in that the cylindrical member has a metal head integrally provided with the tip of the member body, and the metal head is formed by laser processing or casting so that its inner circumferential surface conforms to the head of the hanging fitting.

[0017] Furthermore, in the safety fence of the present invention, the concrete member has a recessed shape at the location corresponding to the embedded position of the suspension fitting.

[0018] Furthermore, in the safety fence of the present invention, it is preferable that a pressing member for pressing the one wall surface of the concrete member by the first fixing member is attached to the cylindrical member.

[0019] Also, in the safety fence of the present invention, the mounting base includes a connection base plate in which a through hole is formed at a position corresponding to the hole of the connecting fitting, and a pedestal having a cross-sectional L shape to which the second fastening member is attached. It is preferable that the pedestal has a fan-shaped bottom, and the connection base plate and the connecting fitting are joined in a superimposed and linear manner.

[0020] Specifically, it is preferable that the pedestal has a fan-shaped bottom, a nut is fixed on the through hole, and a bolt is screwed into the nut.

[0021] Also, it is also preferable that the pedestal has a fan-shaped bottom, and a bar-shaped member having a cross-sectional T shape including a bolt is inserted into and removed from the through hole and the hole.

[0022] Furthermore, between the connection base plate and the pedestal bottom It is also preferable that a strip-shaped small piece is interposed, and the small piece is in close contact with the tip of the connecting fitting.

[0023] Also, the safety fence according to the present invention includes the following aspects as having a technical relationship related so as to form a single general inventive concept.

[0024] That is, the safety fence of the present invention is characterized in that the first fixing member and the second fixing member are joined via a connecting member.

[0025] Also, the safety fence of the present invention is characterized in that the first and second fastening members are respectively attached to the cylindrical member and the mounting base so as to be rotatable.

[0026] Furthermore, the safety fence of the present invention is characterized in that it can be disposed so as to externally connect to the periphery of a building.

[0027] Furthermore, the present invention relates to a method for attaching a safety fence, which is attached to a wall body assembled using a plurality of concrete members, each of which has a connecting fitting with a connecting hole for connecting reinforcing members formed on one wall surface and a hanging fitting with a rotatable head embedded vertically, and comprises a cylindrical member having a metal head whose inner circumferential surface is formed to conform to the shape of the head by laser processing or casting, and a first fastening member provided at the base end of the cylindrical member. A first fixing member having a first fixing member having a mounting base having a connecting base plate with a through hole provided at a position corresponding to the hole and a base with an L-shaped cross section, and a second fixing member having a second fastening member attached to the base; a step of fitting the metal head onto the head such that the base end of the cylindrical member faces in a direction substantially perpendicular to the one wall surface, a connecting step of connecting the connecting fitting and the connecting base plate in an overlapping and linear manner, and a step of traversing between one concrete member and other concrete members among the plurality of concrete members ni The tubular members 1 and 2 each The method is characterized by including the step of detachably attaching the first and second fastening members.

[0028] Furthermore, in the method of installing the safety fence of the present invention, it is preferable to press one of the wall surfaces with a pressing member attached to the cylindrical member.

[0029] Furthermore, the method for attaching the safety fence of the present invention preferably includes the step of forming the bottom of the base in a fan shape and fixing a nut on the through hole, and the connecting step of screwing a bolt into the nut, placing the connecting base plate over the connecting fitting from an oblique direction in plan view so as to have a predetermined angle with respect to the connecting fitting, and rotating the connecting base plate so that the connecting base plate and the connecting fitting are overlapping and in a straight line.

[0030] Furthermore, the method for attaching the safety fence of the present invention preferably includes forming the bottom of the base in a fan shape, and the connecting step includes inserting a rod-shaped member with a T-shaped cross-section, such as a bolt, into the through hole and the hole in the connecting fitting so that it can be inserted and removed.

[0031] Furthermore, the connecting base plate and the base bottom It is also preferable to interpose a strip-shaped piece between the part and the connecting fitting, and to make the piece tightly attached to the tip of the connecting fitting. [Effects of the Invention]

[0032] According to the safety fence of the present invention, the assembly of the wall can be performed without hindering workability while the first and second tubular members are attached to the upper end and middle section of the opening formed between the concrete members, ensuring sufficient safety and effectively preventing workers from falling between the concrete members. Furthermore, since the tip of the tubular member is fitted into the head of a rotatable suspension fitting and the tubular member is attached to the concrete member, there is no need to provide a separate anti-rotation function for the tubular member, and the tubular member can be successfully fixed to the concrete member. Moreover, since the first and second fixing members are detachably attached to the concrete member, and the first and second tubular members are also detachably attached to the first and second fixing members, these members can be attached and detached quickly and easily. In other words, the work efficiency of the wall assembly can be improved without the need to restrain the second tubular member to the connecting fitting with binding wire or the like, as in the conventional method.

[0033] Furthermore, since the metal head is precisely machined by laser processing or casting to conform to the shape of the hanging bracket head, a higher-strength component can be obtained compared to conventional press-formed products.

[0034] Furthermore, since the first fixing member has a pressing member attached to the cylindrical member that presses against the wall surface of the concrete member, the tightening and fixing of the cylindrical member to the concrete member can be strengthened.

[0035] Furthermore, since the connecting base plate and connecting fittings constituting the mounting base are connected in an overlapping and linear manner, and the second tubular member is fastened to the mounting base via the second fastening member, the second fixing member can be firmly fixed to the concrete member without wobbling.

[0036] Specifically, the base is formed with a fan-shaped bottom, and a nut is fixed to the through hole. By screwing a bolt into the nut, or by inserting a T-shaped rod member such as a bolt into the through hole and the hole in a removable manner, the mounting base can be firmly fixed without coming off the connecting fitting.

[0037] Furthermore, even when a strip-shaped piece is interposed between the connecting base plate and the bottom of the base, and the piece is in close contact with the tip of the connecting fitting, excessive rotation of the connecting base plate of the mounting base can be avoided during installation without using bolts or rod-shaped members, and the connecting fitting and the mounting base can be easily installed in an overlapping and linear manner.

[0038] Furthermore, if the first fixing member and the second fixing member are joined together via a connecting member, the first and second fixing members can be fixed together to the concrete member as a single unit.

[0039] Furthermore, if the first and second fastening members are rotatably attached to the cylindrical member and the mounting base, respectively, the first and second fastening members can be erected vertically, enabling the installation of dustproof nets, screens, and noise-reducing panels at work sites, thereby expanding the range of applications.

[0040] Furthermore, the safety fence of the present invention can be installed externally around the perimeter of a building, is lighter than balcony guards installed on the handrails of apartment buildings, and can be used as a substitute for such balcony guards.

[0041] Furthermore, the method for installing a safety fence according to the present invention includes the steps of fitting a metal head onto the rotatable head of a suspension fitting such that the base end of the cylindrical member faces approximately perpendicular to one wall surface, connecting the connecting fitting and the connecting base plate in an overlapping and linear manner, and detachably attaching the first and second tubular members to the first and second fastening members such that they span horizontally between one concrete member and another concrete member among a plurality of concrete members. As a result, the metal head can be fitted onto the head from any direction while rotating the head. Therefore, by attaching the first tubular member to the first fixing member using the first fastening member, the first fixing member can be firmly fixed to the concrete member without the need to separately provide an anti-rotation function. Furthermore, by attaching the second tubular member to the second fixing member via the second fastening member, the second fixing member can be firmly fixed to the concrete member. This makes it easier to assemble the wall structure with the first and second tubular members attached to the concrete members, and prevents on-site workers from falling through the openings formed between the concrete members.

[0042] Furthermore, since the pressing member attached to the cylindrical member presses against the wall surface, the tightening of the cylindrical member to the concrete member can be strengthened.

[0043] Furthermore, the base is formed in a fan shape, and a nut is fixed to the through hole. The connection process includes the step of engaging a bolt with the nut, placing the connecting base plate over the connecting fitting from an oblique direction in plan view so that it is at a predetermined angle to the connecting fitting, and rotating it in a direction approximately perpendicular to one of the wall surfaces to connect the connecting base plate and the connecting fitting in an overlapping manner. Therefore, by engaging the bolt with the nut and rotating it by a predetermined angle, the bolt can be screwed into the nut. Consequently, by attaching the second tubular member to the second fixing member with the second fastening member, the second tubular member can be firmly fixed to the second fixing member without wobbling, freeing on-site workers from the risk of falling and allowing them to perform the assembly work on the wall surface in a safe state.

[0044] Furthermore, by forming the bottom of the base in a fan shape, and by having the connection process involve inserting a T-shaped rod member, such as a bolt, into the through hole and the hole in the connecting fitting so that it can be inserted and removed, the safety fence will not wobble, allowing for safe assembly of the wall body. Moreover, the second fixing member can be attached to and detached from the concrete member simply by removing the rod member from the hole, ensuring good work efficiency.

[0045] Furthermore, by interposing a strip-shaped piece between the connecting base plate and the base bottom, and by making the piece tightly attached to the tip of the connecting fitting, the rotation of the mounting base can be controlled, and the desired safety fence can be obtained.

[0046] Thus, according to the safety fence and the method for installing the safety fence of the present invention, the assembly work of a wall surface using precast concrete members can be carried out without hindering the constructability of the work, and the safety fence components can be attached to and detached from the concrete members in a short amount of time without causing a decrease in work efficiency. [Brief explanation of the drawing]

[0047] [Figure 1] This is a front view of a main part showing one embodiment of a safety fence according to the present invention. [Figure 2] This is a view taken along arrow AA in Figure 1, showing the state in which the first fixing member is attached to the concrete member. [Figure 3] Figure 2 is a plan view. [Figure 4] This is a cross-sectional view of the first fixing member. [Figure 5] This is a plan view of Figure 4. [Figure 6] This is a view taken along arrow BB in Figure 1, and is a left side view showing one embodiment of the state in which the second fixing member is attached to the connecting fitting. [Figure 7] This is a plan view of Figure 6. [Figure 8] This is a cross-sectional view of the second fixing member. [Figure 9]This is a plan view of Figure 8. [Figure 10] This is a plan view showing the process of attaching the second fixing member to the concrete member. [Figure 11] This is an overall front view showing the installation state of the safety fence according to the present invention. [Figure 12] This is a left side view showing another embodiment of the second fixing member attached to the connecting fitting. [Figure 13] This is a front view of a main part showing another embodiment of the safety fence according to the present invention. [Figure 14] This is a plan view of the main components to explain the conventional method of constructing safety fences. [Modes for carrying out the invention]

[0048] Next, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0049] Figure 1 is a front view of the main part of one embodiment of a safety fence according to the present invention, which is used by attaching it to a concrete member when assembling a wall body using precast concrete members on the slope of an embankment or the like.

[0050] As mentioned in the [Background Technology] section, in reinforced earth wall construction methods such as the Terre Armée method, full-size concrete members and half-size concrete members are usually used. The full-size concrete members are arranged in a staggered pattern, with half-size concrete members placed on top. Reinforcement materials are connected to connecting fittings protruding from the concrete members, thereby reinforcing the embankment wall.

[0051] However, as shown in Figure 1, when assembling the wall, a large opening 2 is formed between the concrete member 1a and the concrete member 1b, which poses a risk of workers falling through the opening 2, making it impossible to adequately ensure the safety of the work.

[0052] Therefore, in this embodiment, in order to prevent workers from falling through the opening 2 during on-site work, the first fixing members 6a, 6b and the second fixing members 9a, 9b are detachably attached to the concrete members 1a, 1b, and the first single pipe (first tubular member) 3 is fastened to the first fixing members 6a, 6b with the first single pipe clamps (first fastening members) 4a, 4b, and the second single pipe (second tubular member) 7 is fastened to the second fixing members 9a, 9b with the second single pipe clamps (second fastening members) 8a, 8b, thereby firmly fixing the first and second fixing members 9a, 9b to the concrete members 1a, 1b and ensuring safety.

[0053] Specifically, the first fixing members 6a and 6b are equipped with first single-pipe clamps 4a and 4b for fastening a first single-pipe 3 having a diameter of, for example, 48.6 mm, and the first fixing members 6a and 6b are attached to the upper end faces of the concrete members 1a and 1b. Furthermore, pressing members 5a and 5b are attached to these fixing members 6a and 6b for pressing against the wall surfaces 13a and 13b.

[0054] Furthermore, since the opening 2 also forms a large space in the vertical direction, it is necessary to provide a middle rail (horizontal rail) near the middle of the opening 2 in order to effectively prevent workers from falling through the opening 2.

[0055] Therefore, in this embodiment, second fixing members 9a and 9b, each equipped with second pipe clamps 8a and 8b for fastening a second pipe 7 similar to the first pipe 3, are attached near the middle of the concrete members 1a and 1b.

[0056] Figure 2 is a view taken along arrow AA in Figure 1, showing the state in which the first fixing member 6a is attached to the concrete member 1a. Figure 3 is a plan view of Figure 2. Although the following explanation focuses on the concrete member 1a side, the same applies to the concrete member 1b side.

[0057] The concrete member 1a has a recess 10a formed at a predetermined location on its upper end surface, and a lifting fitting 12a with a rotatable head 11a is embedded vertically in the concrete member 1a within the recess 10a. In other words, the head 11a of the lifting fitting 12a protrudes from the recess 10a so that a wire rope for lifting loads can be attached to it.

[0058] The concrete member 1a is fitted with the first fixing member 6a described above. Specifically, the first fixing member 6a has a cylindrical member 14a whose tip is fitted onto the head 11a of the hanging bracket 12a and which extends in a direction substantially perpendicular to the wall surface 13a, and the pressing member 5a described above is attached to the cylindrical member 14a. The first single-pipe clamp 4a has an inner circumferential surface of the clamp body 15a formed in a substantially split-spherical shape, and the first single-pipe clamp 4a is fastened perpendicularly to it via fasteners 16a such as bolts and nuts. Figure 4 is a cross-sectional view of the first fixing member 6a, and Figure 5 is a plan view of Figure 4.

[0059] In other words, in this first fixing member 6a, the cylindrical member 14a has a metal head 17a at the tip of the member body portion 18a, and the member body portion 18a has a bottomed rectangular tube shape (for example, height: 30 mm, width: 30 mm, length: 230 mm) that extends in a direction substantially perpendicular to the wall surface 13a, thereby securing space for the installation of the first single pipe 3.

[0060] Furthermore, the metal head 17a is formed so that its outer surface can be fitted into the main body portion 18a by laser processing or casting, and its inner surface is shaped to conform to the head portion 11a of the suspension fitting 12a. Laser processing involves irradiating steel with high-energy-density laser light, melting and vaporizing the steel with thermal energy, which enables the processing of fine and complex shapes, and allows for high-precision processing of curved and inclined surfaces. Casting involves pouring molten metal into a mold formed to a predetermined shape, cooling and solidifying it, then demolding it, and finally performing finishing work, thereby making it possible to obtain castings of complex desired shapes at a relatively low cost.

[0061] In this embodiment, a metal head 17a processed into the desired shape described above is obtained using laser processing or casting. The metal head 17a is then fitted into the main body portion 18a and integrally formed with the main body portion 18a by fastening means such as welding.

[0062] A tall nut 19a is joined to the base end of the main body portion 18a of the member by a fastening means such as welding, and a bolt 20a and the tall nut 19a are screwed together through a hole formed in the clamp body 15a, thereby joining the cylindrical member 14a (metal head 17a and main body portion 18a of the member) to the first single-pipe clamp 3.

[0063] The pressing member 5a has a tall nut 21a and a male threaded pressing tool (hereinafter simply referred to as "pressing tool") 23a. Specifically, the pressing member 5a has a first plate-shaped member 22a fixed to the longitudinal end face of the tall nut 21a, and a second plate-shaped member 24a provided on the short end face so that the pressing tool 23a can be inserted through it. The pressing tool 23a has an adjuster plate 25a at its tip, which is a hexagonal nut with a flat plate attached. The first and second plate-shaped members 22a and 24a are fixed to the member body 18a, i.e., the cylindrical member 14a, by fastening means such as welding, thereby attaching the pressing member 5a to the first fixing member 6a. By screwing the pressing tool 23 in the direction of arrow X, the wall surface 13a is pressed, thereby strengthening the tightening of the cylindrical member 14a to the concrete member 1a.

[0064] Figure 6 is a view from arrow BB in Figure 1, showing the state in which the second fixing member 9a is attached to the concrete member 1a. Figure 7 is a plan view of Figure 6. As with the first fixing member 6a described above, the following explanation focuses on the concrete member 1a side, but the same applies to the concrete member 1b side.

[0065] In the reinforced earth wall construction method, which uses precast concrete members to form a wall structure, as described above, a connecting fitting 26a is provided protruding from one wall surface 13a of the concrete member 1a, and reinforcing materials such as steel strips are connected to this connecting fitting 26a via fasteners to reinforce the embankment, etc.

[0066] Therefore, in this embodiment, the connecting fitting 26a is used to connect the connecting fitting 26a and the second fixing member 9a in an overlapping and linear manner, and the second single pipe 7 is firmly fixed to the second fixing member 9a, thereby improving safety during work.

[0067] Specifically, a connecting fitting 26a, which is bent into an L-shape in cross-section, is embedded in the concrete member 1a, and the tip 27a of the connecting fitting 26a protrudes from one wall surface 13a of the concrete member 1a. Two holes, namely a first hole 28a and a second hole 29a, are typically formed in this tip 27a for connecting reinforcing materials.

[0068] Furthermore, the second fixing member 9a has a mounting base 30a that is superimposed and linearly connected to the connecting fitting 26, and a second single-pipe clamp 8a connected to the mounting base 30a. The second single-pipe clamp 8a, like the first single-pipe clamp 4a, has an interior of the clamp body 31a formed in a roughly split-spherical shape, and the second single-pipe 7 is tightly fastened orthogonally via fasteners 32a such as bolts and nuts.

[0069] Figure 8 is a cross-sectional view of the second fixing member 9a, and Figure 9 is a plan view of Figure 8.

[0070] The mounting base 30a comprises a connecting base plate 35a having a first through hole 33a and a second through hole 34a, and an L-shaped base plate 36a to which a second single-pipe clamp 8a is attached. The first and second through holes 33a and 34a are formed at positions corresponding to the first hole 28a and the second hole 29a, respectively, and the connecting base plate 35a is fixed to the first through hole 33a by a fastening means such as welding with a nut 40a.

[0071] Furthermore, the base 36a has a fan-shaped bottom 37a which is positioned on the back side of the connecting base plate 35a, and a second single-pipe clamp 8a is fixed to the base 36a via fasteners 38a such as bolts and nuts. By forming the bottom 37a in a fan shape in this way, as will be described later, when connecting the connecting fitting 26a and the connecting base plate 35a, i.e., the mounting base 30a, it becomes possible to connect the connecting fitting 26a and the mounting base 30a in an overlapping and linear manner without contacting the bottom 37a, simply by rotating the mounting base 30a by a predetermined angle from an oblique direction in plan view.

[0072] Furthermore, a strip-shaped piece 41a having approximately the same side length as the bottom portion 37 is interposed between the connecting base plate 35a and the bottom portion 37a, and this piece 41a is in close contact with the tip portion 27a of the connecting fitting 26a. This allows for control to prevent the mounting base 30a from rotating excessively when attaching the connecting base plate 35a, i.e., the mounting base 30a, to the connecting fitting 26a, and ensures that the connecting fitting 26a and the connecting base plate 35a are securely joined in an overlapping and linear manner. Therefore, by fastening the second single pipe 7 with the second single pipe clamp 8a, the second fixing member 9a can be firmly fixed to the concrete member 1a without having to screw the bolt 42a into the nut 40a.

[0073] Thus, in this embodiment, the first fixing member 6a has a cylindrical member 14a whose tip is fitted into the head 11a of the hanging fitting 12a and extends in a direction substantially perpendicular to one wall surface 13a of the concrete member 1a, and a first single-pipe clamp 4a provided at the base end of the cylindrical member 14a, and a second fixing member 9a having a mounting base 30a superimposed on the connecting fitting 26a and a second single-pipe clamp 8a connected to the mounting base 30a, and the first and second fixing members 6a and 9a are detachably attached to each of the plurality of concrete members 1a..., and the Since the first and second single pipes 3 and 7 are detachably attached via the first and second single pipe clamps 4a, 4b, 8a, and 8b to span horizontally between one concrete member 1a and another concrete member 1b among the multiple concrete members 1a..., the assembly work of the wall can be carried out without hindering workability while the first and second single pipes 3 and 7 are attached to the upper end and middle section of the opening 2 formed between the concrete members 1a and 1b, ensuring sufficient safety and effectively preventing workers from falling between the concrete members 1a and 1b. Furthermore, since the tip of the cylindrical member 14a is fitted into the head 11a of the rotatable hanging fitting 12a, and the cylindrical member 14a is firmly attached to the concrete member 1a, there is no need to provide a separate anti-rotation function for the cylindrical member 14a, and the cylindrical member 14a can be successfully fixed to the concrete member. Furthermore, since the first and second fixing members 6a and 9a are detachably attached to the concrete member 1a, and the first and second single pipes 3 and 7 are also detachably attached to the first and second fixing members 6a and 9a, these members can be attached and detached quickly and easily. In other words, the work efficiency of the wall assembly work can be improved without the need to restrain the second single pipes 3 and 7 to the connecting fittings 26a with wire or the like, as in the conventional method.

[0074] Furthermore, the cylindrical member 14a has a metal head 17a integrally attached to the tip of the member body 18a, and the metal head 17a is precisely machined by laser processing or casting so that its inner circumferential surface conforms to the head 11a of the suspension fitting 12a. As a result, a member with higher strength can be obtained compared to conventional press-formed products.

[0075] Furthermore, since the first fixing member 6a has a pressing member 5a attached to the cylindrical member 14a that presses against the wall surface 13a of the concrete member 1a, the tightening and fixing of the cylindrical member 14a to the concrete member 1a can be strengthened.

[0076] Furthermore, the mounting base 30a has a connecting base plate 35a in which first and second through holes 33a and 34a are formed at positions corresponding to the first and second holes 28a and 29a of the connecting fitting 26a, and a base plate 36a with an L-shaped cross section to which the second single-pipe clamp 8a is attached. The connecting base plate 35a and the connecting fitting 26a are joined in an overlapping and linear manner, and the second single-pipe 7 is attached to this mounting base 30a, so that the second single-pipe clamp 7 and the mounting base 30a can be firmly fixed to the concrete member 1a.

[0077] Specifically, the base 36a has a fan-shaped bottom 37a, and a nut 40a is fixed to the first through hole 34a. A bolt 42a is screwed into the nut 40a, thereby allowing the mounting base 30a and the connecting fitting 26a to be attached in an overlapping manner.

[0078] Furthermore, by interposing a strip-shaped piece 41 between the connecting base plate 35a and the bottom 37a of the base 36a, and by making the piece 41 tightly attached to the tip of the connecting fitting 26a, it is possible to prevent the connecting base plate 35a from rotating excessively during installation, and the connecting fitting 26a and the base plate 35a mounting base can be easily installed in an overlapping and linear manner.

[0079] Next, we will explain how to install this safety fence.

[0080] First, the first fixing members 6a, (6b) are attached to the concrete members 1a, (1b).

[0081] As shown in Figure 4 above, the first fixing member 6a has a cylindrical member 14a with a metal head 17a integrally attached to its tip, and a first single-pipe plumb 4a is attached to the base end of the cylindrical member 14a, and a pressing member 5a is attached to the main body portion 18a of the cylindrical member 14a.

[0082] Then, as shown in Figure 2 above, the head 11a of the suspension fitting 12a is rotated so that the metal head 17a is fitted onto the head 11a from any direction. Next, the cylindrical member 14a is rotated so that the base end of the cylindrical member 14a faces approximately perpendicular to the wall surface 13a. Next, the wall surface 13a is pressed using the pressing member 5a. That is, the pressing tool 23a is screwed into the high nut 21a and the wall surface 13a is pressed with the adjuster plate 25a, thereby strengthening the fastening of the first fixing member 6a to the concrete member 1a.

[0083] Next, the second fixing members 9a and (9b) are attached to the concrete members 1a and (1b).

[0084] As shown in Figure 8 above, the second fixing member 9a comprises a mounting base 30a having a connecting base plate 35a with a first through hole 33a positioned to correspond to the first hole 28a of the connecting fitting 26a, and a base plate 36a with an L-shaped cross section, and a second single-pipe clamp 8a attached to the base plate 36a. A nut 40a is fixed onto the first through hole 33a. Furthermore, the bottom portion 37a of the base plate 36a is formed in a fan shape and is positioned on the back side of the connecting base plate 35a. In addition, a strip-shaped piece 41 with a side length approximately the same as the bottom portion 37a is interposed between the bottom portion 37a and the connecting base plate 35a.

[0085] Figure 10 is a plan view showing the process of attaching the second fixing member 9a to the concrete member 1a.

[0086] As shown in Figure 10(a), the connecting fitting 26a protruding from the concrete member 1a typically has two holes, namely a first hole 28a and a second hole 29a, for connecting the reinforcing material.

[0087] Then, a bolt 42a is inserted into a nut 40a formed on the connecting base plate 35a of the second fixing member 9a, and as shown in Figure 10(b), the connecting base plate 35a is placed on the connecting fitting 26a from an oblique direction in plan view so that it has a predetermined angle θ (for example, 45°) with respect to the connecting fitting 26a. Furthermore, as shown in Figure 10(c), the connecting base plate 35a is rotated in the direction of arrow Y, and as shown in Figure 10(d), the connecting fitting 26a and the connecting base plate 35a are installed in an overlapping and linear manner. That is, the bottom 37a of the base 36a is formed in a fan shape, and the small piece 41 is in close contact with the tip of the connecting fitting 26a, which prevents excessive rotation, and thus the connecting fitting 26a and the connecting base plate 35a can be installed in an overlapping and linear manner.

[0088] Then, by fastening the first single pipe 3 perpendicularly with the first single pipe clamps 4a, (4b) and fastening the second single pipe 7 perpendicularly with the second single pipe clamps 8a, (8b), the first fixing members 6a, (6b) and the second fixing members 9a, (9b) are firmly supported by the first and second single pipes 3, 7, and a sturdy safety fence that is effective in preventing workers from falling can be attached to the concrete members 1a, (1b).

[0089] Figure 11 is an overall front view showing the installation state of the safety fence.

[0090] Specifically, full-size concrete members 1a, 1b and half-size concrete member 1c are installed on the embankment 43, and first and second single-pipe pipes 3, 7 are firmly fixed to the concrete members 1a and 1b horizontally by first fixing members 6a, 6b and second fixing members 9a, 9b, and a safety fence is attached to the concrete members 1a and 1b. Then, as shown by arrow Z, another full-size concrete member 1d is installed on the half-size concrete member 1c with the safety fence attached. This ensures that workers do not fall from the opening 2 and improves safety during work.

[0091] On the other hand, the attachment and detachment of the safety fence from the concrete members 1a and 1b can be carried out quickly and easily as follows: The first and second single pipes 3 and 7 are removed from the first and second single pipe clamps 4a, 4b, 8a, and 8b, then the bolt 42a is unscrewed from the nut 40a, the screw on the pressing tool 23a of the pressing member 5 is loosened, and the head 11a of the hanging bracket 12a is rotated to detach the metal head 17a from the head 11a. This allows the first and second fixing members 6a, 6b, 9a, and 9b to be removed from the concrete members 1a and 1b in a short time, enabling the safety fence to be dismantled and the process to proceed quickly to the next step.

[0092] It goes without saying that the present invention is not limited to the above embodiments and can be modified without departing from the spirit of the invention. In order to achieve the object of the present invention, it is essential that the first fixing members 6a, 6b and the second fixing members 9a, 9b can be detachably attached to the concrete members 1a, 1b while the first and second single pipes 3, 7 are detachably attached.

[0093] Figure 12 shows another embodiment illustrating the attachment state of the second fixing member 9a to the concrete member 1a.

[0094] In the previous embodiment, as shown in Figures 6-8, a nut 40a is fixed to the first through hole 33a, and a bolt 42a is screwed into the nut 40a, thereby firmly connecting the mounting base 30a (connecting base plate 35a) and the connecting fitting 26a in an overlapping and linear manner through the cooperative action with the second single pipe 7. However, in this other embodiment, a T-shaped rod member 44, such as a bolt, is inserted through the second through hole 34a which communicates with the second hole 29a. In this case as well, by fastening the second single pipe 7 with the second single pipe clamps 8a and 8b, the connecting fitting 26a and the connecting base plate 35a can be firmly fixed in an overlapping and linear manner. In this case, there is no need to screw in a nut and bolt as in the previous embodiment, and the safety fence can be attached to the concrete member in a simpler form.

[0095] Furthermore, as described above, the connecting fitting 26a usually has two holes, and therefore two through holes (first and second through holes 33a and 34a) are provided. However, there may be only one through hole, in which case the intended purpose can be achieved by fixing a nut to the through hole and screwing it with a bolt, or by inserting a rod-shaped member with a T-shaped cross-section in a removable manner.

[0096] Figure 13 is a front view of a main part showing another embodiment of the safety fence of the present invention, in which the first fixing members 6a, 6b and the second fixing members 9a, 9b are joined by a connecting member 45.

[0097] When the first fixing members 6a, 6b and the second fixing members 9a, 9b are joined together by the connecting member 45, the first and second fixing members 6a, 6b, 9a, 9b can be firmly fixed together to the concrete members 1a, 1b.

[0098] Furthermore, the safety fence of the present invention can be used for a variety of purposes.

[0099] For example, by rotatably attaching the first single-pipe clamps 4a, 4b and the second single-pipe clamps 8a, 8b to the cylindrical members 14a, 14b and the mounting bases 30a, 30b, respectively, it becomes possible to erect the first single-pipe clamps 4a, 4b and the second single-pipe clamps 8a, 8b vertically. This allows for the installation of dustproof nets, privacy screens, and noise reduction panels at work sites, thereby expanding the range of applications.

[0100] Furthermore, the safety fence of the present invention can also be installed externally around the perimeter of a building. In this case, it is lighter than the balcony guards installed on the handrails of apartment buildings and can be used as a substitute for such balcony guards. [Industrial applicability]

[0101] A safety fence that is easily detachable and has good strength can be attached to concrete members, effectively preventing workers from falling between concrete members when assembling wall structures on site, and each component of the safety fence can be easily attached and detached. [Explanation of Symbols]

[0102] 1a, 1b Concrete members 3. First single pipe (first tubular member) 4a, 4b First pipe clamp (first fastening member) 5a, 5b Pressing members 6a, 6b First fixing member 7. Second single pipe (second tubular member) 8a, 8b Second pipe clamp (second fastening member) 9a, 9b Second fixing member 11a Head 12a Hanging hardware 13a Wall surface 14a Cylindrical member 17a Metal head 26a Connecting fittings 28a First hole 29a Second hole 30a Mounting base 33a First through hole 34a Second through hole 35a Connecting base plate 36a Pedestal 40a nut 41a Small piece 42a Bolt 44a Bolt (rod-shaped member) 45a, 45b Connecting members

Claims

1. A safety fence is provided in a wall structure assembled using these concrete members, wherein a connecting fitting with a connecting hole for connecting reinforcing members is provided protruding from one wall surface, and a hanging fitting with a rotatable head is embedded vertically. A first fixing member having a cylindrical member whose tip is fitted into the head and which extends in a direction substantially perpendicular to one of the wall surfaces, and a first fastening member provided at the base end of the cylindrical member, The device comprises a mounting base that is superimposed and linearly connected to the aforementioned connecting fitting, and a second fixing member having a second fastening member connected to the mounting base, The first and second fixing members are detachably attached to each of the plurality of concrete members, A safety fence characterized in that, among the plurality of concrete members, a first and a second tubular member are detachably attached via the first and second fastening members, respectively, so as to span horizontally between one concrete member and another concrete member.

2. The cylindrical member has a metal head that is integrally provided with the main body of the member at the tip of the main body of the member, The safety fence according to claim 1, characterized in that the metal head is formed by laser processing or casting so that its inner circumferential surface conforms to the head of the hanging fitting.

3. The safety fence according to claim 1 or 2, characterized in that the concrete member has a recessed shape at a location corresponding to the embedded position of the suspension fitting.

4. The safety fence according to claim 1 or 2, characterized in that the first fixing member has a pressing member attached to the cylindrical member that presses against one wall surface of the concrete member.

5. The mounting base comprises a connecting base plate having through holes formed at positions corresponding to the holes of the connecting fitting, and an L-shaped base to which the second fastening member is attached. The safety fence according to claim 1 or 2, characterized in that the base plate and the connecting fitting are connected in an overlapping and linear manner.

6. The safety fence according to claim 5, characterized in that the base has a fan-shaped bottom, a nut is fixed to the through hole, and a bolt is screwed into the nut.

7. The safety fence according to claim 5, characterized in that the base has a fan-shaped bottom and a rod-shaped member with a T-shaped cross-section is inserted into the through hole and the hole in a manner that allows for insertion and removal.

8. The safety fence according to claim 7, characterized in that the rod-shaped member includes a bolt.

9. The safety fence according to claim 5, characterized in that a strip-shaped piece is interposed between the connecting base plate and the bottom of the base, and the piece is in close contact with the tip of the connecting fitting.

10. The safety fence according to claim 1 or 2, characterized in that the first fixing member and the second fixing member are joined via a connecting member.

11. The safety fence according to claim 1 or 2, characterized in that the first and second fastening members are rotatably attached to the cylindrical member and the mounting base, respectively.

12. A safety fence according to claim 1 or 2, characterized in that it can be installed in a manner that is in contact with the periphery of a building.

13. A method for attaching a safety fence to a wall structure assembled using multiple concrete members, each of which has connecting fittings with holes for connecting reinforcing members formed on one wall surface and a hanging fitting with a rotatable head embedded vertically, wherein the safety fence is attached to the wall structure during assembly. A first fixing member having a cylindrical member having a metal head whose inner circumferential surface is formed to conform to the shape of the head by laser processing or casting, and a first fastening member provided at the base end of the cylindrical member, A mounting base is provided, which has a connecting base plate with a through hole provided at a position corresponding to the hole and a base with an L-shaped cross-section, and a second fixing member is provided, which has a second fastening member attached to the base. A step of fitting the metal head onto the head such that the base end of the cylindrical member faces in a direction substantially perpendicular to the one wall surface, A connecting step of connecting the connecting fitting and the connecting base plate in an overlapping and linear manner, The process involves attaching the first and second tubular members to the first and second fastening members, respectively, so as to span horizontally between one concrete member and another concrete member among the plurality of concrete members. A method for installing a safety fence, characterized by including [a specific element].

14. The method for installing a safety fence according to claim 13, characterized in that a pressing member attached to the cylindrical member presses against one of the wall surfaces.

15. The bottom of the base is formed in a fan shape, and a nut is fixed over the through hole. The method for attaching a safety fence according to claim 13 or 14, characterized in that the connection step includes the steps of screwing a bolt onto the nut, placing the connecting base plate over the connecting fitting from an oblique direction in plan view so as to have a predetermined angle with respect to the connecting fitting, and rotating the connecting base plate so that the connecting base plate and the connecting fitting are superimposed and in a straight line.

16. The bottom of the base is formed in a fan shape, The method for attaching a safety fence according to claim 13 or 14, characterized in that the connection step includes the step of inserting a rod-shaped member with a T-shaped cross-section into the through hole and the hole of the connecting fitting so as to be removable.

17. The method for attaching a safety fence according to claim 16, characterized in that the rod-shaped member includes a bolt.

18. A method for attaching a safety fence according to claim 13 or 14, characterized in that a strip-shaped piece is interposed between the connecting base plate and the bottom of the base, and the piece is brought into close contact with the tip of the connecting fitting.

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