Net bracket

Abstract

This invention provides a net bracket that can be attached to scaffolding posts over a wide area, including the fastening portion of the scaffolding post. [Solution] The net bracket 10 comprises an arm 30, an arm support body 20 that extends and supports the arm 30, and a first leg portion 40 and a second leg portion 50 that are detachably attached to the scaffolding support column 220 at the upper and lower parts of the arm support body 20. Between the first leg portion 40 and the second leg portion 50, the arm support body 20 has a fastening portion storage space S that prevents the arm support body 20 from interfering with the fastening portion 230, etc. When the arm support body 20 is positioned relative to the fastening portion 230, etc., the fastening portion 230, etc. is straddled and stored within the fastening portion storage space S.

Description

Technical Field

[0001] The present invention relates to a net bracket.

Background Art

[0002] Net brackets are used to be attached to the scaffolding posts of a temporary scaffold and arrange a Russell net between the temporary scaffold and a building (Patent Documents 1, 2, and 3). With this Russell net, prevention of falling objects and the like are achieved. The net brackets of Patent Documents 1 to 3 are each provided with an arm, a bracket body that supports the arm, clamps at the upper and lower parts of the back of the bracket body, and U-shaped legs.

[0003] On the scaffolding post, fastening parts for connecting handrails are arranged at a predetermined pitch. The fastening parts are provided in a flange or a pocket shape. The distance between the bracket body and the scaffolding post when attached to a conventional scaffolding post is shorter than the protruding amount from the outer periphery of the scaffolding post of the fastening part.

[0004] Therefore, conventional net brackets cannot be attached so as to straddle the fastening part, and are attached to the scaffolding post at a position that does not interfere with the fastening part. In the case of a building having a veranda or an apartment having a shared corridor, etc., it is preferable to attach the net bracket so as to minimize the gap with the lower surface of the veranda or the lower surface of the shared corridor. This is to eliminate the risk that falling objects, etc. that have fallen onto the Russell net supported by the net bracket will fly into the body side (building side) through the gap.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

[0006] The placement of the net brackets depends on the height of the building's foundation and the height of the temporary scaffolding's risers. Furthermore, the floor heights of the building and the temporary scaffolding may not always match. Figure 9 illustrates an example of net bracket placement in such cases.

[0007] In the example shown in Figure 9, the mounting position for the net bracket 240, which minimizes the gap between the building 200 and the underside of the balcony 210A, is near the fastening portion 230A, which is one of the fastening portions 230 and 230A arranged at predetermined intervals on the scaffolding support column 220.

[0008] However, because the net bracket 240 interferes with the fastening portion 230A, in practice, as shown in Figure 9, it is attached to the scaffolding support 220 at a position below the fastening portion 230A. As a result, a gap is created between the underside of the veranda 210A and the net bracket 240, which is undesirable because it poses a risk of falling objects flying into the structure (building side) through the gap.

[0009] Furthermore, a net bracket that attaches only to the fastening portion has also been proposed (Patent Document 4). It is conceivable that the problems of the above example can be resolved by using this net bracket that attaches only to the fastening portion.

[0010] However, unlike Patent Documents 1 to 3, the net bracket, which is attached only to the fastening portion, cannot be attached to the outer surface of the scaffolding support column excluding the fastening portion. The object of the present invention is to provide a net bracket that can be attached to a scaffolding support column over a wide area, including the fastening portion of the scaffolding support column. [Means for solving the problem]

[0011] To solve the above problems, the net bracket of the present invention is a net bracket that is arranged on a scaffolding support column having fastening parts for handrails arranged at predetermined intervals on its outer circumference, and comprises a net arm, an arm support body that extends and supports the net arm, a first leg portion provided on the upper part of the arm support body and detachably attached to the scaffolding support column, and a second leg portion provided on the lower part of the arm support body, wherein the arm support body between the first leg portion and the second leg portion has a fastening part storage space portion formed therein so that the arm support body does not interfere with the fastening part, and when the arm support body is positioned relative to the fastening part, the arm support body straddles the fastening part, so that at least the fastening part is stored in the fastening part storage space portion, among the fastening part and the handrail arranged around the fastening part.

[0012] Furthermore, the net bracket of the present invention is a net bracket that is arranged on a scaffolding support column having fastening parts for handrails arranged at predetermined intervals on its outer circumference, and comprises a net arm, an arm support body that extends and supports the net arm, a first leg provided on the upper part of the arm support body and detachably attached to the scaffolding support column, and a second leg provided on the lower part of the arm support body, wherein the first leg and the second leg are arranged to protrude from the arm support body toward the scaffolding support column, and a fastening part storage space is formed by the first leg, the second leg and the arm support body, and when the arm support body is positioned relative to the fastening part, the arm support body straddles the fastening part, so that at least the fastening part is stored in the fastening part storage space, along with the handrail arranged around the fastening part and the fastening part.

[0013] Furthermore, it is preferable that the vertical length of the fastening portion storage space is longer than the vertical length of the fastening portion itself. Furthermore, the arm support body may support the net arm by extending it diagonally upward.

[0014] Further, the net arm may be composed of an outer pipe and an inner pipe, and either one of the outer pipe and the inner pipe may be supported by the arm support body, and the other may be slidable with respect to the one.

Effect of the Invention

[0015] The present invention has an effect that it can be attached to the scaffolding support in a wide range including the fastening part of the scaffolding support.

Brief Description of the Drawings

[0016] [Figure 1] It is a front view of a net bracket according to an embodiment. [Figure 2] It is a plan view of a net bracket according to an embodiment. [Figure 3] It is an end view of an arm of a net bracket.​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​First, let's explain the fastening sections 230 and 230A of the scaffolding support columns 220 used to construct the temporary scaffolding. Fastening section 230A means that the handrail 250A, which will be described later, will be attached to it. The fastening parts 230 and 230A shown in Figure 1 are provided on the scaffolding support column 220 at predetermined intervals in the vertical direction. The fastening parts 230 and 230A are provided on the outer circumferential surfaces in four directions, each at a 90-degree angle to the center of the scaffolding support column 220. Furthermore, fastening parts 230 and 230A facing 180 degrees opposite directions are arranged at the same height, while fastening parts 230 and 230A facing 90 degrees opposite directions are arranged in close proximity, as shown in Figure 1.

[0019] In this embodiment, the fastening portions 230 and 230A are pocket-shaped and are formed from metal fittings that are formed in a U-shape in flat cross-section on the scaffolding support column 220. The fastening portions 230 and 230A have hooking holes 232.

[0020] As shown in Figure 1, the upper end 230a of the fastening portions 230 and 230A is formed to be further away from the outer surface of the scaffolding support column 220 than the lower end. As shown in Figure 1, let m be the distance from the outer surface of the scaffolding support column 220 to the upper end 230a when viewed from the side.

[0021] As shown in Figure 1, the connecting wedge members 252 provided at the ends of the handrails 250 and 250A can be inserted into the latching holes 232 of the fastening portions 230 and 230A in a vertically detachable manner. For the sake of explanation, the handrail perpendicular to the front-to-back direction of the net bracket 10 is denoted as "250A".

[0022] The connecting wedge members 252 at both ends of the handrails 250 and 250A are hooked onto the fastening parts 230 and 230A of the adjacent scaffolding posts 220, respectively, thereby horizontally mounting the handrails 250 and 250A between the scaffolding posts 220.

[0023] As shown in Figures 1 to 3, the net bracket 10 is made of metal and comprises an arm support body 20, an arm 30 supported by the arm support body 20, and first and second legs 40 and 50 that attach the arm support body 20 to the scaffolding support column 220 and maintain that position. In this specification, the front and rear relationship of the net bracket 10 is such that when the net bracket 10 is attached to the scaffolding support column 220, the side facing the scaffolding support column 220 is considered the "rear" and the side opposite the scaffolding support column is considered the "front". The arm 30 corresponds to the net arm.

[0024] (Regarding the arm support body 20) As shown in Figures 1 and 2, the arm support body 20 has a pair of side walls 21 and a bottom wall 22 that connects the rear ends of both side walls 21.

[0025] The side wall 21 has a step formed by the upper part 21a and lower part 21b at the rear end of the side wall 21 being offset rearward from the intermediate part 21c at the rear end, which is located between the upper part 21a and the lower part 21b. As shown in Figure 1, the length of this step is denoted as h.

[0026] The bottom wall 22 has an upper bottom wall 22a and a lower bottom wall 22b that connect the upper parts 21a and lower parts 21b of the side walls 21, respectively, and an intermediate bottom wall 22c that connects the intermediate parts 21c of the side walls 21.

[0027] The arm support body 20 is formed in a concave cross-section by the side walls 21 and the bottom wall 22. The arm support body 20 is open between the upper ends of the upper parts 21a and the lower ends of the lower parts 21b of both side walls 21, as well as between the front parts of both side walls 21.

[0028] As shown in Figure 1, elongated holes 23 extend vertically from both side walls 21. A shaft 24 passes through both elongated holes 23. The shaft 24 is mounted so as to be slidable between the upper and lower ends of the elongated holes 23 and so as not to be detached from the elongated holes 23.

[0029] (Regarding the first leg portion 40 and the second leg portion 50) A first leg portion 40 is provided on the rear surface of the upper bottom wall 22a. As shown in Figures 1 and 2, the first leg portion 40 consists of a clamp. The clamp has a fixed clamp piece 42 fixed to the upper bottom wall 22a, a movable clamp piece 44 connected to the base end of the fixed clamp piece 42 so as to be openable and closable by a hinge 43, a bolt 45 rotatably connected to the tip of the fixed clamp piece 42, and a nut 46 screwed onto the bolt 45. The first leg portion 40 is detachably attached to the scaffolding support column 220 by both clamp pieces.

[0030] An engagement groove 47 is formed at the tip of the movable clamp piece 44, into which a bolt 45 can be inserted. The net bracket 10 is sandwiched between the movable clamp piece 44 and the fixed clamp piece 42, and attached to the scaffolding support 220 by screwing a nut 46 onto it while the bolt 45 is engaged in the engagement groove 47 of the movable clamp piece 44.

[0031] A second leg portion 50 is provided on the rear surface of the lower bottom wall 22b. The second leg portion 50 is formed from a metal fitting curved in a U-shape in cross-section. With the net bracket 10 attached to the scaffolding support column 220 by the first leg portion 40, the second leg portion 50 abuts against the outer surface of the scaffolding support column 220. As shown in Figure 1, the state in which the net bracket 10 is attached to the first leg portion 40 and the second leg portion 50 will be referred to below as the "mounting position" of the net bracket 10.

[0032] (Regarding the fastening storage space S) In the "mounting position" of the net bracket 10, as shown in Figure 1 when viewed from the side, the intermediate bottom wall 22c and the outer surface of the scaffolding support column 220 are supported by the fixing clamp piece 42 and the second leg portion 50 so that they are parallel or approximately parallel.

[0033] Let d be the distance between the intermediate bottom wall 22c and the outer surface of the scaffolding support 220 at this time. In this case, "d distance - h length of step" is the distance that the intermediate bottom wall 22c contributes to the distance between the intermediate bottom wall 22c and the outer surface of the scaffolding support 220 due to the fixing clamp piece 42 and the second leg portion 50.

[0034] As shown in Figure 1, in the {mounting position} of the net bracket 10, the distance d between the intermediate bottom wall 22c and the outer surface of the scaffolding support column 220 is set to be longer than the distance m between the upper end 230a of the fastening portion 230, 230A and the outer surface of the scaffolding support column 220.

[0035] As shown in Figure 1, the vertical length f of the intermediate bottom wall 22c is long enough to straddle both the handrail 250A and the fastening parts 230 and 230A when the connecting wedge member 252 of the handrail 250A is fastened to the hooking hole 232 of the fastening part 230A. Therefore, the vertical length f of the intermediate bottom wall 22c is longer than the vertical length of the fastening part 230. The vertical length f of the intermediate bottom wall 22c corresponds to the vertical length.

[0036] If the vertical length f of the intermediate bottom wall 22c exceeds the length that interferes with the handrails 250, 250A and the fastening parts 230, 230A which are hooked into the fastening holes 232 of the fastening parts 230, 230A, then the intermediate bottom wall 22c may straddle the fastening parts 230, 230A. Furthermore, the vertical length f of the intermediate bottom wall 22c may exceed the length that interferes with the handrails 250, 250A and the fastening parts 230, 230A, and may also be a length that allows the vertical mounting position to be changed while the net bracket 10 straddles the fastening parts 230, 230A.

[0037] However, the vertical length of the arm support body 20 is shorter than the predetermined pitch of the fastening parts 230 and 230A. As described above, when the "mounting position" of the net bracket 10 is viewed from the side, as shown in Figure 1, a fastening storage space S is formed between the intermediate portion 21c of the net bracket 10 and the outer circumference of the scaffolding support column 220 by the first leg portion 40, the second leg portion 50 and the intermediate bottom wall 22c.

[0038] As a result, as shown in Figure 1, when the arm support body 20 of the net bracket 10 is positioned relative to the fastening parts 230 and 230A, it is possible to position the fastening parts 230 and 230A within the fastening part storage space S.

[0039] (Regarding Arm 30) As shown in Figure 1, the arm 30 is composed of a tubular outer pipe 31 and an inner pipe 32. The inner pipe 32 is slidably fitted into the outer pipe 31 in the longitudinal direction. The length of the arm 30 is adjustable by the amount to which the inner pipe 32 is fitted into the outer pipe 31.

[0040] As shown in Figure 3, a concave slide groove 33 is formed extending in the longitudinal direction on the outer circumferential surface of the inner pipe 32. A wing nut 34 is screwed onto the outer circumference of the tip of the outer pipe 31. When the wing nut 34 is screwed onto the outer pipe 31, the tip of the wing nut 34 engages with the slide groove 33 of the inner pipe 32. Then, after the tip of the wing nut 34 contacts the inner pipe 32, it is tightened, fixing the inner pipe 32 to the outer pipe 31. The engagement of the wing nut 34 with the slide groove 33 prevents the inner pipe 32 from rotating around its axis relative to the outer pipe 31.

[0041] The base end of the outer pipe 31 is inserted between the side walls 21 of the arm support body 20 and is pivotally supported by the shaft 24 shown in Figure 1. Between the side walls 21 of the arm support body 20, a regulating shaft 25 is installed in front of the elongated hole 23 and slightly below the upper end of the elongated hole 23.

[0042] As shown in Figure 1, when the outer pipe 31 is tilted forward with the shaft 24 locked to the upper end of the elongated hole 23, the restricting shaft 25 locks the outer pipe 31 as shown in the figure. Due to the locking of the restricting shaft 25 by the restricting shaft 25, the arm 30 extends so that its tip points diagonally upward.

[0043] Furthermore, when the shaft 24 of the arm 30 is locked to the lower end of the elongated hole 23, the arm 30 is restricted by the restricting shaft 25, as shown by the dashed line in Figure 1, and can transition to a folded state where the outer surface of the outer pipe 31 is positioned closer to the bottom wall 22. In other words, the arm 30 can be displaced between a position that extends diagonally upward and a folded state, i.e., a position that is upright relative to the arm support body 20, and is therefore foldable.

[0044] As shown in Figures 1 to 3, a tip hook 35 is fixed to the tip of the inner pipe 32. Base hooks 26 are fixed to both side walls 21 of the arm support body 20. A Russell net (not shown) is attached to the base hooks 26 and the tip hook 35.

[0045] (Effect of the embodiment) The operation of the net bracket 10 configured as described above will be explained with reference to Figures 4 to 6. Figures 4(a) to 4(d) are explanatory diagrams showing how the net bracket 10 is attached to the scaffolding support column 220.

[0046] <When the second leg portion 50 interferes with the handrail 250A and the connecting portion 230A> In these diagrams, the net bracket 10 assumes a scenario where the second leg portion 50 interferes with the handrail 250A and the fastening portion 230A due to the degree and dimensions of the U-shaped curvature of its cross-section, making it impossible to place them on the scaffolding support column 220.

[0047] (Point P1) Point P1 in Figure 4(a) is the uppermost position between the fastening portion 230A and the fastening portion 230B located above the fastening portion 230A, where the net bracket 10 can be attached by the first leg portion 40.

[0048] (Point P2) Point P2 in Figure 4(b) is the position where the second leg portion 50 is closest to the upper end of the handrail 250A. Point P2 is the lowest position between the fastening portions 230, which are arranged at a predetermined pitch, where the net bracket 10 can be attached by the first leg portion 40.

[0049] (Point P3) Point P3 in Figure 4(c) is the position where the first leg portion 40 is closest to the upper end of the handrail 250A, as shown in Figure 1. Note that in Figure 1, for the sake of explanation, the net bracket 10 is shown slightly separated from the handrail 250A.

[0050] When the net bracket 10 is located at point P3, it is installed so as to straddle the fastening portion 230A and the end of the handrail 250A attached to the fastening portion 230A, as shown in Figure 1. In other words, the fastening portions 230, 230A and the handrail 250A arranged around the fastening portion 230A are straddled by the net bracket 10, and are therefore housed within the fastening portion storage space S.

[0051] Note that point P3 is not intended to include only one point. If the vertical length f of the intermediate bottom wall 22c is greater than or equal to the length shown in Figure 1, it is obvious that there are multiple points to which the net bracket 10 can be attached.

[0052] (Point P4) Point P4 in Figure 4(d) is the uppermost position between the fastening portion 230A and a fastening portion (not shown) located below the fastening portion 230A, where the net bracket 10 can be attached by the first leg portion 40.

[0053] Therefore, if the second leg portion 50 interferes with the handrail 250A or the fastening portion 230A due to the degree of curvature or dimensions of its U-shaped cross-section, the net bracket 10 can be attached to the scaffolding support column 220 between P1 and P2, and at point P3.

[0054] <When the second leg portion 50 does not interfere with the handrail 250A or the fastening portion 230A> Referring to Figures 5(a) to 5(d), we will now explain the cases in which the second leg portion 50 does not interfere with the handrail 250A and the fastening portion 230A, depending on the degree and dimensions of the U-shaped curvature of its cross-section.

[0055] (Point P1) Point P1 in Figure 5(a) is the same as point P1 in Figure 4(a). For the sake of explanation, the second leg portion 50 in Figures 5(a) to 5(d) is shown to be the same size as the second leg portion 50 in Figures 4(a) to 5(d).

[0056] (Points P5) Point P5 in Figure 5(b) is the position where the second leg portion 50 is closest to the upper end of the fastening portion 230, which is located proximal to the lower part of the handrail 250A.

[0057] Point P5 is the lowest position where the net bracket 10 can be attached to the scaffolding support column 220 between the fastening portion 230B and the fastening portion 230A by the first leg portion 40. (Point P3) Point P3 in Figure 5(c) is the same as point P3 in Figure 4(c).

[0058] Therefore, when the net bracket 10 is located at point P3, it is installed so as to straddle the fastening portion 230A and the end of the handrail 250A attached to the fastening portion 230A, as shown in Figure 1. In other words, the fastening portions 230, 230A and the handrail 250A arranged around the fastening portion 230A are housed within the fastening portion storage space S.

[0059] (Point P4) Point P4 in Figure 5(d) is the same as point P4 in Figure 4(d). Therefore, if the second leg portion 50 does not interfere with the handrail 250A or the fastening portion 230A due to the degree of curvature and dimensions of its U-shaped cross-section, the net bracket 10 can be attached to the scaffolding support column 220 between P1 and P5, and at point P3.

[0060] <Comparative Example> Referring to Figures 6(a) to 6(c), a comparative example for comparison with the embodiments shown in Figures 4(a) to 4(d) will be described.

[0061] In contrast, the net bracket 100 of the comparative example has a flat bottom wall 22 (upper bottom wall 22a, lower bottom wall 22b, and intermediate bottom wall 22c), and does not form a fastening storage space S. Since the other components of the net bracket 100 are similar to those of the net bracket 10, components identical to or equivalent to those of the net bracket 10 shall be given the same reference numerals, and the dimensions of the components shall be the same.

[0062] Therefore, point P1 in Figure 6(a), point P2 in Figure 6(b), and point P4 in Figure 6(c) are the same as point P1 in Figure 4(a), point P2 in Figure 4(b), and point P4 in Figure 4(d).

[0063] Comparing the two figures, the comparative example net bracket 100 can only be attached to the scaffolding support column 220 between P1 and P2, but not between P2 and P4. In other words, the net bracket 100 cannot be attached where the fastening portion 230 shown in Figures 6(a) to 6(c) is located.

[0064] This embodiment has the following features. (1) In this embodiment, the net bracket 10 has a fastening part storage space S formed in the arm support body 20 between the first leg portion 40 and the second leg portion 50, which prevents the arm support body 20 from interfering with the fastening part 230. Furthermore, when the arm support body 20 is positioned relative to the fastening part 230, the fastening part 230 and the handrail 250A arranged around the fastening part 230 are housed in the fastening part storage space S by being straddled by the arm support body 20.

[0065] As a result, it can be attached to scaffolding posts over a wide area, including the fastening points of the scaffolding posts. (2) In the net bracket 10 of this embodiment, the vertical length f (length in the vertical direction) of the fastening part storage space S is made longer than the vertical length of the fastening part 230. As a result, a wide area including the fastening part of the scaffolding support column can be set.

[0066] (3) The arm support body 20 of the net bracket 10 in this embodiment supports the arm 30 (net arm) by extending it diagonally upward. Therefore, when the net bracket 10 is positioned to straddle the fastening portion 230, for example, when the arm 30 is located below the underside of a balcony or the underside of a common corridor, the gap with the underside can be narrowed compared to when the arm 30 is positioned horizontally. By narrowing the gap, the risk of falling objects flying into the structural frame (building side) through the gap can be reduced.

[0067] (4) The arm 30 of the net bracket 10 is composed of an outer pipe 31 and an inner pipe 32. The outer pipe 31 is supported by the arm support body 20. The inner pipe 32 is slidable relative to the outer pipe 31.

[0068] As a result, when the net bracket 10 is positioned to straddle the fastening portion 230, and the arm 30 is located below the underside of the balcony or the underside of the common corridor, if there is a horizontal gap between the two, the gap can be narrowed by extending the arm 30. This narrowing of the gap reduces the risk of falling objects flying into the structural frame (building side) through the gap.

[0069] (Second Embodiment) The net bracket 10 of the second embodiment will be described with reference to Figure 7. In the first embodiment, a fastening storage space S is formed between the intermediate portion 21c of the net bracket 10 and the outer circumference of the scaffolding support column 220 by the first leg portion 40, the second leg portion 50, and the intermediate bottom wall 22c.

[0070] Instead of this configuration, as shown in Figure 7, the bottom wall 22 is made flat by omitting the step. The first leg portion 40 and the second leg portion 50 are then attached to the upper and lower ends of the bottom wall 22 of the arm support body 20 via mounting base portions 27 and 28. With this configuration, the first leg portion 40 and the second leg portion 50 are positioned to protrude from the arm support body 20 toward the scaffolding support column.

[0071] In this case, a fastening storage space S is formed between the bottom wall 22 and the outer circumference of the scaffolding support column 220 by the first leg portion 40, the second leg portion 50, and the base portions 27 and 28. With this configuration, when the arm support body 20 is positioned relative to the fastening part 230, etc., the fastening part, etc. is straddled by the net bracket 10, allowing the fastening part, etc. to be stored within the fastening part storage space S.

[0072] (Third embodiment) The net bracket 10 of the third embodiment will be described with reference to Figure 8. In contrast to the configuration of the second embodiment, the mounting bases 27 and 28 for the first leg portion 40 and the second leg portion 50 are fixed to the upper and lower ends of the side walls 21. With this configuration, the first leg portion 40 and the second leg portion 50 are positioned to protrude from the arm support body 20 toward the scaffolding support column.

[0073] In this case, a fastening storage space S is formed between the bottom wall 22 and the outer circumference of the scaffolding support column 220 by the first leg portion 40, the second leg portion 50, and the base portions 27 and 28. In this embodiment, the base hook 26 is fixed to the base portion 27.

[0074] With this configuration, when the arm support body 20 is positioned relative to the fastening portion 230, etc., as in the above embodiment, the fastening portion, etc. can be straddled and thus housed within the fastening portion storage space S.

[0075] This embodiment can be implemented with the following modifications. This embodiment and the following modifications can be combined and implemented to the extent that they do not contradict each other technically.

[0076] In the above embodiment, the inner pipe 32 is slidably fitted into the outer pipe 31 of the arm support body 20. Alternatively, the inner pipe 32 may be pivotally supported on the arm support body 20 by a shaft 24, and the outer pipe 31 may be slidably fitted into the inner pipe 32. A tip hook 35 is then fixed to the tip of the outer pipe 31.

[0077] In the above embodiment, the arm 30 is shown extending diagonally upward, but the arm 30 may also be in a horizontal position. In the above embodiment, the second leg portion 50 is made of a metal fitting curved in a U-shape in cross-section, but the configuration is not limited to this. For example, the second leg portion 50 may be made of a clamp, similar to the first leg portion 40.

[0078] In the above embodiment, the fastening portion was made of a metal fitting formed in a U-shape with a flat cross-section. Instead of this configuration, a flange (not shown) having latching holes on all four sides may be used on the outer surface of the scaffolding support column 220. [Explanation of Symbols]

[0079] 10…Net bracket 20...Arm support body 21...Side wall 21a...Top 21b…lower part 21c…middle part 22...Bottom wall 22a... Upper bottom wall 22b...Lower bottom wall 22c…Intermediate bottom wall 23…Long hole 24...axis 25…Regulatory axis 26... Base hook 27...base 28...base 30... Arm (arm for net) 31…Outer pipe 32... Inner pipe 33…Slide groove 34... Wing nut 35...Tip hook 40...1st leg 42…Fixing clamp piece 43... Hinge 44…Movable clamp piece 45... Volts 46... Nut 47…Engagement groove 50…Second leg 220... Scaffolding support 230, 230A, 230B...Tightening part 230a…Top end 232...Latching hole 250, 250A... Handrail S... Storage space for fastening part

Claims

1. A net bracket to be placed on a scaffolding support column having fastening parts for handrails arranged at predetermined intervals around its outer circumference, comprising a net arm, an arm support body that extends and supports the net arm, a first leg portion provided on the upper part of the arm support body and detachably attached to the scaffolding support column, and a second leg portion provided on the lower part of the arm support body, The arm support body between the first leg portion and the second leg portion has a fastening portion storage space formed therein, which prevents the arm support body from interfering with the fastening portion, and when the arm support body is positioned relative to the fastening portion, the arm support body straddles the fastening portion, so that the fastening portion, the handrail positioned around the fastening portion, and the fastening portion are housed in the fastening portion storage space, and at least the fastening portion is housed in the net bracket.

2. A net bracket to be placed on a scaffolding support column having fastening parts for handrails arranged at predetermined intervals around its outer circumference, comprising a net arm, an arm support body that extends and supports the net arm, a first leg portion provided on the upper part of the arm support body and detachably attached to the scaffolding support column, and a second leg portion provided on the lower part of the arm support body, The first leg portion and the second leg portion are arranged to protrude from the arm support body toward the scaffolding support column, and the first leg portion, the second leg portion and the arm support body form a fastening portion storage space. When the arm support body is positioned relative to the fastening portion, the arm support body straddles the fastening portion, thereby housing the fastening portion, the handrail positioned around the fastening portion, and the fastening portion within the fastening portion storage space, including at least the fastening portion, in the net bracket.

3. The net bracket according to claim 1 or claim 2, wherein the vertical length of the fastening portion storage space is longer than the vertical length of the fastening portion.

4. The net bracket according to claim 3, wherein the arm support body supports the net arm by extending it diagonally upward.

5. The net bracket according to claim 4, wherein the net arm is composed of an outer pipe and an inner pipe, and either the outer pipe or the inner pipe is supported by the arm support body, and the other is slidable relative to the other.

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