Holding device

Abstract

To provide a holding device that can be miniaturized for storage and transportation.SOLUTION: A holding device 1 comprises: a first member 11A having a first surface 12aA formed thereon; a second member 11B having a second surface 12aB formed thereon; a hinge part 36 that is connected to the first and second members so that the first and second members are mutually rotatable and allows for the positional switching of the first and second members between a closed state C2 in which the first and second surfaces are opposed to each other and an opened state C1 in which the first and second surface are more separated from each other than the first and second surfaces in the closed state; a support holding part 40 for detachably holding the first and second members in the opened state on the support member; and a first supported holding part 45A provided on the first member and detachably holding the supported member.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a retaining device. [Background technology]

[0002] Conventionally, for example, at steel frame construction sites, work scaffolding has been set up at column-beam joints where columns (support members) and beams are joined in order to perform work such as welding at the column-beam joints (see, for example, non-patent document 1). For example, the columns are made of square steel pipes and extend upward from the installation surface. In order for workers to climb from the installation surface to the work scaffold, a ladder is installed between the installation surface and the work scaffold in the vertical direction.

[0003] In Non-Patent Document 1, the upper end of the ladder is fixed to a work scaffold, and the middle part of the ladder in the vertical direction is fixed to a pillar by a holding device via a pipe material (supported member) or the like. Specifically, the holding device has an L-shaped plate, a belt (supporting and holding part), and a clamp (supported and held part). The L-shaped plate is formed in an L shape and is arranged along a corner of the pillar. The belt is attached to the L-shaped plate and wrapped around the pillar. The belt secures the L-shaped plate to the pillar. The clamp is secured to the L-shaped plate. The clamp holds the tubular material. The tubular material is secured to the ladder.

[0004] As described above, the ladder is fixed not only at the top end but also at the middle part, which makes the ladder less likely to shake when a worker climbs the ladder. [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] “Product Details: Blanket for Anti-vibration Stays”, Nisso Sangyo Co., Ltd., [online], [Retrieved August 9, 2022], Internet〈URL:https: / / www.nisso-sangyo.co.jp / products / 2335〉 Summary of the Invention [Problem to be solved by the invention]

[0006] However, since the holding device of Non-Patent Document 1 uses an L-shaped plate, the outer shape of the holding device is large, which causes a problem that the holding device is difficult to store and transport.

[0007] The present invention has been made in consideration of such problems, and has an object to provide a holding device that can be made compact during storage and transportation. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention proposes the following means. (1) A first aspect of the present invention is a holding device comprising: a first member having a first surface formed thereon; a second member having a second surface formed thereon; a hinge portion connected to the first member and the second member so that the first member and the second member are rotatable relative to each other, capable of switching positions of the first member and the second member between a closed state in which the first surface and the second surface face each other and an open state in which the first surface and the second surface are further away from each other than the first surface and the second surface in the closed state; a supporting and holding portion that detachably holds the first member and the second member in the open state to a supporting member; and a first supported and held portion provided on the first member that detachably holds a supported member.

[0009] In this invention, when the holding device is used, the first surface and the second surface are opened by the hinge portion. With the first surface of the first member and the second surface of the second member in contact with the support member, the first member and the second member are held on the support member by the support holding portion. By holding the supported member by the first supported and held portion provided on the first member, for example, a ladder fixed to the supported member can be fixed to the support member via the holding device. When the work using the holding device is completed, the support member is released from the first supported and held portion, and the supporting member is released from the supporting and holding portion. When the first and second faces are closed by the hinge portion, the first and second members are made smaller in size in the direction in which the first and second faces face each other. Therefore, the holding device can be made smaller during storage and transportation when not in use.

[0010] (2) A second aspect of the present invention may be the holding device according to (1), further comprising a second supported and held portion provided on the second member for detachably holding the supported member. In this invention, the supported member can be held not only by the first supported and held portion, but also by the second supported and held portion.

[0011] (3) A third aspect of the present invention may be the holding device according to (1) or (2), in which the first member and the second member are each formed in a flat plate shape. In this invention, when the first member and the second member are in the closed state, the first member and the second member can be made smaller in size in the direction in which the first surface and the second surface face each other.

[0012] (4) A fourth aspect of the present invention may be a holding device described in any one of (1) to (3), wherein the first member has a first through hole extending along the first surface and penetrating the first member. In this invention, for example, when a bolt and a nut are used to provide the first supported and held portion on the first member, the nut is placed in the first through hole. Then, the first member and the first supported and held portion can be fastened together with the bolt and the nut. In addition, this nut can be easily replaced with a new nut through the first through hole.

[0013] (5) A fifth aspect of the present invention may be a retaining device described in any one of (1) to (4), wherein the hinge portion has a first engagement portion provided on the first member and a second engagement portion provided on the second member and engaging with the first engagement portion, the first engagement portion and the second engagement portion extend along a rotation axis about which the first member and the second member rotate, and have a regulating portion that regulates movement of the first engagement portion in a direction along the rotation axis relative to the second engagement portion. In this invention, the movement of the first engagement portion and the second engagement portion, which tend to move relatively in the direction along the rotation axis, is restricted by the restricting portion, so that the function of the hinge portion can be maintained.

[0014] (6) A sixth aspect of the present invention may be a holding device according to any one of (1) to (5), wherein the first member and the second member are each formed of aluminum or an aluminum alloy. In the present invention, for example, the first member and the second member can be made lighter than when the first member and the second member are made of steel. Effect of the Invention

[0015] The holding device of the present invention can be made compact for storage and transportation. [Brief description of the drawings]

[0016] [Figure 1] 1 is a cross-sectional plan view of a beam-column structure in which a retaining device according to one embodiment of the present invention is used. [Diagram 2] FIG. 2 is a view taken in the direction of the arrow A1 in FIG. [Diagram 3] 3 is a cross-sectional view taken along line A5-A5 in FIG. 2. [Figure 4] FIG. 4 is an enlarged view of a main part in FIG. [Diagram 5] FIG. 4 is a front view of the holding device when the first and second clamps are in a gripping state. [Figure 6] FIG. 4 is a front view of the holding device when the first and second clamps are in a non-gripping state. [Figure 7] 13 is a cross-sectional plan view of another beam-column structure in which the retaining device of one embodiment of the present invention is used. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, one embodiment of a holding device according to the present invention will be described with reference to FIGS. As shown in Fig. 1 and Fig. 2, the retaining device 1 of this embodiment is used for a column-beam structure 100. Fig. 1 is a cross-sectional view taken along the line A2-A2 in Fig. 2. The column-beam structure 100 is a structure before the building is completed when the building is constructed. In Fig. 1, a beam 102, which will be described later, is indicated by a two-dot chain line. The column-beam structure 100 includes, for example, a plurality of columns (support members) 101 and a plurality of beams 102. Note that only one of the plurality of columns 101 is shown in Fig. 1 and Fig. 2. A plurality of columns 101 extend upward from an installation surface F, which is the upper surface of a foundation or the like. For example, the columns 101 are rectangular steel pipes with four box sides. The columns 101 are formed by welding four thick plates 101a together. The beams 102 extend along a horizontal plane and are bridged between a pair of adjacent columns 101. The portion where the columns 101 and the beams 102 are joined to each other is a column-beam joint 103.

[0018] A work scaffold 110 is installed at the column-beam joint 103. For example, a Light Stage (manufactured by Sanshin Kizai Co., Ltd.) is preferably used as the work scaffold 110. The work scaffold 110 has a pair of floor plates 111, a pair of bridge plates 112, and handrails and the like (not shown). The pair of floorboards 111 are disposed to sandwich the pillar 101 from a first horizontal direction along a horizontal surface. The pair of floorboards 111 are fixed to the pillar 101 by fixing devices (not shown). The pair of bridge plates 112 are arranged along the horizontal plane and in a second horizontal direction perpendicular to the first horizontal direction, sandwiching the pillars 101. Each bridge plate 112 is fixed to the pair of floor plates 111 in a state of being bridged between the pair of floor plates 111. The pair of floor plates 111 and the pair of cross plates 112 are formed in a frame shape as a whole and surround the pillars 101. The handrails are provided on the outer edges of the pair of floorboards 111 and the pair of cross plates 112, on the sides away from the pillars 101. The handrails extend upward from these outer edges.

[0019] A ladder 115 is stretched between the installation surface F and the work scaffold 110. For example, the upper end of the ladder 115 and the floor plate 111 of the work scaffold 110 are fixed to each other by a fastener (not shown).

[0020] As shown in Fig. 3 and Fig. 4, the holding device 1 includes a first rotating member 10, a second rotating member 30, a belt mechanism (supporting and holding portion) 40, a plurality of first clamps (first supported and held portions) 45A, a plurality of second clamps (second supported and held portions) 45B, and a restricting portion 55. Note that the holding device 1 in Fig. 3 and Fig. 4 is in an open state C1 in which a first surface 12aA and a second surface 12aB, which will be described later, of the rotating members 10, 30 are relatively spaced apart from each other. In Fig. 4, the pillar 101 is indicated by a two-dot chain line, and a pipe material 125, which will be described later, is not shown. As shown in Fig. 4, the first rotating member 10 has a first member 11A, a cushioning material 16A, and a first engagement portion 21. As shown in Fig. 4 and Fig. 5, the first member 11A is formed in a flat plate shape. In Fig. 5, a pipe material 125, which will be described later, is indicated by a two-dot chain line. The first member 11A has a first plate member 12A, a second plate member 13A, and a plurality of partition plates 14A.

[0021] The first plate 12A, the second plate 13A, and the partition plate 14A are each formed in a flat plate shape. As shown in Fig. 4, the first plate 12A and the second plate 13A are arranged to face each other. The surface of the first plate 12A opposite to the second plate 13A is the first surface 12aA. That is, the first member 11A is formed with the first surface 12aA. In this example, the first surface 12aA is flat. A plurality of recesses 13aA are formed on the surface of the second plate material 13A opposite to the first plate material 12A. The partition plates 14A are disposed between the first plate material 12A and the second plate material 13A. Each partition plate 14A extends along a first direction 120A along the first surface 12aA. The partition plates 14A are disposed along the first surface 12aA and spaced apart from one another in a second direction 121A perpendicular to the first direction 120A.

[0022] A first through hole 11aA is formed in the first member 11A between a pair of partition plates 14A adjacent to each other in the second direction 121A. The first through hole 11aA extends in the first direction 120A and penetrates the first member 11A.

[0023] The cushioning material 16A is formed in a flat plate shape. For example, the cushioning material 16A is formed of synthetic rubber such as ethylene propylene rubber (EPDM: Ethylene Propylene Diene Methylene linkage). The cushioning material 16A is fixed to the first surface 12aA of the first plate material 12A by an adhesive or the like.

[0024] The first engagement portion 21 is provided at an end portion of the first member 11A in the second direction 121A. The first engagement portion 21 has an engagement portion main body 22 and a claw . The engagement portion main body 22 is connected to an end portion of the first plate material 12A in the second direction 121A and an end portion of the second plate material 13A in the second direction 121A. The claw 23 is provided on the engagement portion main body 22 . The first member 11A and the first engagement portion 21 are integrally formed from aluminum or an aluminum alloy. For example, the aluminum alloy is an alloy containing aluminum at a weight ratio of 50% or more. The aluminum alloy includes duralumin and the like.

[0025] The second rotating member 30 has a second member 11B, a cushioning material 16B, and a second engaging portion 31. The first engaging portion 21 and the second engaging portion 31 form a hinge portion . In this embodiment, the configuration of the first member 11A and the configuration of the second member 11B are the same as each other. Therefore, the configuration of the first member 11A is indicated by adding the capital letter "A" to the number of the reference symbol, or the number and lowercase English letter. The configuration of the second member 11B corresponding to the first member 11A is indicated by adding the capital letter "B" to the number or the number and lowercase English letter that is the same as the reference symbol of the first member 11A. This avoids redundant explanations. For example, the first plate material 12A of the first member 11A and the first plate material 12B of the second member 11B have the same configuration as each other. The same applies to the first clamp 45A and the second clamp 45B, etc.

[0026] The second member 11B is formed in a flat plate shape. The second member 11B has a first plate material 12B, a second plate material 13B, and a plurality of partition plates 14B that are configured similarly to the first plate material 12A, the second plate material 13A, and a plurality of partition plates 14A of the first member 11A. The surface of the first plate material 12B opposite to the second plate material 13B is the second surface 12aB. That is, the second member 11B has the second surface 12aB. A second through hole 11aB is formed in the second member 11B between a pair of partition plates 14B adjacent to each other in the second direction 121B. The second through hole 11aB extends in the first direction 120B and penetrates the second member 11B.

[0027] The second engagement portion 31 is provided at an end portion of the second member 11B in the second direction 121B. The second engagement portion 31 has an engagement portion main body 32 and a claw 33. The engagement portion main body 32 is connected to an end portion in the second direction 121B of the first plate material 12B and an end portion in the second direction 121B of the second plate material 13B. The claw 33 is provided on the engagement portion main body 32. The claw 33 engages with the claw 23 of the first engagement portion 21. The first engagement portion 21 and the second engagement portion 31 have a known shape that allows them to rotate about the rotation axis O1 while engaging with each other. The first engagement portion 21 and the second engagement portion 31 each extend along the rotation axis O1. The first direction 120A and the first direction 120B are each a direction along the rotation axis O1. The length of the engaging portion main body 32 and the claw 33 in the direction along the rotation axis O1 is longer than the length of the engaging portion main body 22 and the claw 23 in the direction along the rotation axis O1. In other words, the engaging portion main body 32 and the claw 33 protrude on both sides in the direction along the rotation axis O1 beyond the engaging portion main body 22 and the claw 23. The second member 11B and the second engagement portion 31 are integrally formed from aluminum or an aluminum alloy.

[0028] For example, the first member 11A and the first engaging portion 21 can be integrally formed by extrusion molding. Similarly, the second member 11B and the second engaging portion 31 can be integrally formed by extrusion molding. As described above, the hinge portion 36 is connected to the first member 11A and the second member 11B so that the first member 11A and the second member 11B are rotatable relative to each other. In the holding device 1 configured as above, the rotating members 10 and 30 are in the open state C1, and the first surface 12aA and the second surface 12aB are in contact with the pillar 101 via the buffer materials 16A and 16B.

[0029] As shown in FIGS. 3 to 5, the belt mechanism 40 includes a belt 41, a belt guide 42, and a tightening mechanism 43. The belt 41 is looped around the outer sides of the rotating members 10 and 30 and the column 101 in the open state C1. The belt guide 42 is fixed to the second plate members 13A, 13B of the rotating members 10, 30. The belt guide 42 guides the belt 41 so that the belt 41 can move only in the second direction 121A relative to the first rotating member 10 and the belt 41 can move only in the second direction 121B relative to the second rotating member 30.

[0030] The tightening mechanism 43 has a known ratchet mechanism, lashing mechanism, etc. The tightening mechanism 43 tightens the belt 41, whereby the rotating members 10, 30 are fixed to the pillar 101. On the other hand, by releasing the fastening by the fastening mechanism 43, the belt 41 is released from the rotating members 10 and 30 and the pillar 101, and the holding device 1 is removed from the pillar 101. As described above, the belt mechanism 40 detachably holds the first rotating member 10 (first member 11A) and the second rotating member 30 (second member 11B) to the pillar 101 in the open state C1.

[0031] The second clamp 45B shown in Fig. 5 is in a gripping state C6 capable of gripping a tubular material (supported member) 125. In Fig. 5, the tubular material 125 is indicated by a two-dot chain line. As shown in Fig. 1, for example, the tubular material 125 has a first single pipe 126 and a second single pipe 127. The single pipes 126, 127 are each straight. The second single pipe 127 is provided at the end of the first single pipe 126 and extends in a direction perpendicular to the first single pipe 126. The second single pipe 127 is fixed to the ladder 115 by a fixing device (not shown). The second clamp 45B is capable of gripping the first single pipe 126 of the pipe material 125.

[0032] As shown in FIG. 5, for example, the second clamp 45B has a main body 46B, an arm 47B, a screw member 48B, and a nut 49B. The main body 46B and the arm 47B each have an arc shape in a side view. A recess 46aB recessed outward is formed in the center of the inner peripheral surface of the main body 46B in the width direction (second direction 121B) (see also FIG. 4). As shown in FIG. 4, the main body 46B is disposed in the depression 13aB of the second plate material 13B. As shown in FIG. 5, a first end of the main body 46B is disposed lower than a second end of the main body 46B that is opposite to the first end.

[0033] As shown in FIG. 4, the main body 46B is fixed to the second plate material 13B by a nut 51B and a bolt 52B. Specifically, the nut 51B is disposed in the second through hole 11aB of the second member 11B. The head of the bolt 52B is disposed in the recess 46aB of the main body 46B. Although not shown, the shaft of the bolt 52B is disposed in a through hole formed in each of the main body 46B and the second plate material 13B. The shaft of the bolt 52B is fitted into the nut 51B. The head of the bolt 52B and the nut 51B tighten the main body 46B and the second plate material 13B in the thickness direction of the second plate material 13B. 5, a first end of the arm 47B is rotatably connected to a first end of the body 46B. A notch 47aB is formed in a second end of the arm 47B opposite to the first end.

[0034] A male screw (reference numeral omitted) is formed at a first end of the screw member 48B. The first end of the screw member 48B is disposed in a notch 47aB of the arm 47B. A second end of the screw member 48B opposite to the first end is rotatably connected to a second end of the main body 46B. The nut 49A contacts the outer surface of the second end of the arm 47B. The female thread of the nut 49A fits into the male thread of the screw member 48B. The nut 49A tightens the second end of the arm 47B toward the second end of the body 46B. As described above, the second clamp 45B has a circular ring shape in the gripping state C6 in which the second clamp 45B can hold (grip) the pipe material 125. The second clamp 45B is fixed to the second plate material 13B by the nut 51B and the bolt 52B. That is, the second clamp 45B is provided on the second plate material 13B of the second member 11B. As shown in FIG. 4, the second clamps 45B are arranged at intervals in the second direction 121B.

[0035] On the other hand, when the nut 49A fitted to the screw member 48B is loosened in the second clamp 45B in the gripping state C6, the screw member 48B comes out of the notch 47aB of the arm 47B as shown in Fig. 6. The arm 47B rotates about the first end, and the second end of the arm 47B moves downward relative to the first end. At this time, the second clamp 45B is in a non-gripping state C7 in which the second clamp 45B does not hold the pipe 125. As described above, the second clamp 45B removably holds the pipe 125.

[0036] As shown in FIGS. 4 and 5, the first clamp 45A includes a body 46A, an arm 47A, a screw member 48A, and a nut 49A that are configured similarly to the body 46B, an arm 47B, a screw member 48B, and a nut 49B of the second clamp 45B. The first clamp 45A is provided on the second plate material 13A of the first member 11A. The first clamp 45A holds the pipe material 125 in a detachable manner. As shown in FIG. 5, in this example, the positions in the first direction 120A (first direction 120B) at which the multiple first clamps 45A are arranged coincide with the positions in the first direction 120A at which the multiple second clamps 45B are arranged. The positions in the first direction 120A at which the multiple first clamps 45A are arranged and the positions in the first direction 120A at which the multiple second clamps 45B are arranged may be shifted in the first direction 120A.

[0037] As shown in Fig. 4, for example, the restriction portion 55 has a pair of rivets 56. Note that Fig. 4 shows only one of the pair of rivets 56. Each rivet 56 is fixed to a portion of the claw 33 that protrudes in the direction along the rotation axis O1 beyond the first engagement portion 21. Each rivet 56 is locked to the claw 23 of the first engagement portion 21 in the direction along the rotation axis O1. The restricting portion 55 restricts the first engaging portion 21 from moving relative to the second engaging portion 31 in the direction along the rotation axis O1. The restricting portion 55 may have a pair of screws or the like instead of the pair of rivets 56.

[0038] The first rotating member 10 and the second rotating member 30 rotate relatively around the rotation axis O1, and the second rotating member 30 moves to the position shown by the two-dot chain line in Fig. 4 with respect to the first rotating member 10. At this time, the first rotating member 10 and the second rotating member 30 of the holding device 1 are in a closed state C2 in which the first surface 12aA and the second surface 12aB face each other. At this time, the angle formed by the first surface 12aA and the second surface 12aB is about 0°. On the other hand, when at least one of the first and second rotating members 10 and 30 rotates relatively around the rotation axis O1 from the first and second surfaces 12aA and 12aB in the closed state C2, the first and second surfaces 12aA and 12aB are in the open state C1. The first and second surfaces 12aA and 12aB in the open state C1 are farther apart from each other than the first and second surfaces 12aA and 12aB in the closed state C2. The angle between the first and second surfaces 12aA and 12aB in the open state C1 is about 90°.

[0039] As described above, the hinge portion 36 of the holding device 1 is capable of switching the positions of the first surface 12aA and the second surface 12aB between the open state C1 and the closed state C2. The angle between the first surface 12aA and the second surface 12aB in the open state C1 is not limited as long as it is greater than 0°. The hinge portion 36 may be capable of switching the positions of the first surface 12aA and the second surface 12aB between three or more states including the open state C1 and the closed state C2.

[0040] As described above, in the holding device 1 of this embodiment, when the holding device 1 is used, the first surface 12aA and the second surface 12aB are put into the open state C1 by the hinge portion 36. In a state in which the first surface 12aA of the first member 11A and the second surface 12aB of the second member 11B are in contact with the pillar 101 via the cushioning materials 16A and 16B, the first member 11A and the second member 11B are held to the pillar 101 by the belt mechanism 40. The pipe material 125 is held by the first clamp 45A provided on the first member 11A. When holding the tubular material 125, for example, the first clamps 45A and the second clamps 45B are each in a non-gripping state C7 in advance, as shown in Fig. 6. The second clamps 45B may each be in a gripping state C6.

[0041] In the multiple first clamps 45A, the first single pipe 126 of the pipe material 125 is clamped between the main body 46A and the arm 47A, and the multiple first clamps 45A are each placed in the gripping state C6 as shown in Fig. 5. In this way, the multiple first clamps 45A hold the first single pipe 126 of the pipe material 125. In this manner, the ladder 115 fixed to the pipe material 125 can be fixed to the column 101 via the holding device 1. Then, the worker climbs up the ladder 115 from the installation surface F to the work scaffold 110. On the work scaffold 110, the worker performs work such as welding the column-beam joint 103.

[0042] When work using the holding device 1 is completed, the holding of the pipe material 125 by the first clamp 45A is released, and the holding of the column 101 by the belt mechanism 40 is released. When the first surface 12aA and the second surface 12aB are placed in the closed state C2 by the hinge portion 36, the first member 11A and the second member 11B are made smaller in size in the direction in which the first surface 12aA and the second surface 12aB face each other. Therefore, the holding device 1 can be made smaller during storage and transportation when not in use.

[0043] 3, the corner of the inner surface 135a of the conventional L-shaped plate 135 is not a right angle, but has a predetermined radius of curvature. This makes it difficult for the inner surface 135a to come into close contact with the pillar 101. In contrast, in the holding device 1 of this embodiment, the cushioning materials 16A and 16B can be brought into close contact with the pillar 101.

[0044] The holding device 1 includes a plurality of second clamps 45B. Therefore, the pipe material 125 can be held not only by the plurality of first clamps 45A but also by the plurality of second clamps 45B. Even if the orientation of the holding device 1 attached to the column 101 is incorrect, the possibility that the pipe material 125 can be held by the plurality of first clamps 45A or the plurality of second clamps 45B can be increased. The first member 11A and the second member 11B are formed in a flat plate shape. Therefore, when the first member 11A and the second member 11B are in the closed state C2, the first member 11A and the second member 11B can be made smaller in size in the direction in which the first surface 12aA and the second surface 12aB face each other.

[0045] A first through hole 11aA is formed in the first member 11A. When a bolt 52A and a nut 51A are used to provide the first clamp 45A to the first member 11A, the nut 51A is placed in the first through hole 11aA. Then, the first member 11A and the first clamp 45A can be fastened together by the bolt 52A and the nut 51A. In addition, the nut 51A can be easily replaced with a new nut 51A through the first through hole 11aA. The holding device 1 includes a regulating portion 55. Therefore, the movement of the first engagement portion 21 and the second engagement portion 31, which tend to move relatively in the direction along the rotation axis O1, can be regulated by the regulating portion 55, thereby maintaining the function of the hinge portion 36.

[0046] The first member 11A and the second member 11B are each made of aluminum or an aluminum alloy, which allows the first member 11A and the second member 11B to be lighter than when the first member 11A and the second member 11B are made of steel, for example.

[0047] The retaining device 1 can also be used for a column-beam structure 130 shown in FIG. The column-beam structure 130 includes a bracket-equipped column 131 and a plurality of beams 102. The bracket-equipped column 131 includes the column 101 and a plurality of brackets 132. The brackets 132 are joined by welding to the side surfaces of the column 101. The brackets 132 protrude along a horizontal plane from the column 101. The beam 102 is welded to the brackets 132 while abutting against the brackets 132. In this example, the upper end of the ladder 115 is fixed to a bracket 132. The middle part of the ladder 115 in the vertical direction is fixed to the pillar 101 via a pipe material 125 and a retaining device 1. In this case, a worker who climbs the ladder 115 can perform work such as welding at the welded portion between the bracket 132 and the beam 102, etc.

[0048] Although one embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and changes, combinations, deletions, etc. of the configuration are also included within the scope that does not deviate from the gist of the present invention. For example, in the above embodiment, the number of first clamps 45A and the number of second clamps 45B included in the holding device 1 may be one each. The first through-hole 11aA does not necessarily have to be formed in the first member 11A, and the second through-hole 11aB does not necessarily have to be formed in the second member 11B. The first member does not have to be formed in a flat plate shape, and may be formed in a hemispherical shape on which the first surface is formed, etc. The shape of the second member is also similar to that of the first member.

[0049] The hinge portion 36 may be a hinge having a pair of hinge pieces that can open and close relative to each other. In the above description, the supporting member is a pillar 101, and the supported member is a pipe 125. However, the supporting member is not limited to this and may be a shaft-shaped member or the like, and the supported member is not limited to this and may be a ladder 115 or the like. Although the support and retention portion is described as the belt mechanism 40, the support and retention portion is not limited to this and may be a clamp, a fitting member, or the like. Although the first and second supported and held portions are described as the first and second clamps 45A and 45B, the first and second supported and held portions are not limited to this and may be fitting members or the like.

[0050] The first member 11A and the second member 11B may each be made of a steel plate or the like. The holding device 1 does not necessarily have to include the cushioning materials 16A and 16B, the plurality of second clamps 45B, and the restricting portion 55. The pillars may be rectangular steel pipe columns, or may be made of reinforced concrete (RC) or steel reinforced concrete (SRC). [Explanation of symbols]

[0051] 1 Holding device 11aA 1st through hole 11A First Component 11B Second member 12aA 1st page 12aB 2nd page 21 First engagement portion 31 Second engagement portion 36 Hinge part 55 Regulatory Department 101 Pillar (supporting member) 125 Piping material (supported member) C1 open state C2 Closed state O1 Rotation axis

Claims

1. A first member having a first surface formed thereon; A second member having a second surface formed thereon; a hinge portion that is connected to the first member and the second member so as to be rotatable relative to each other, and that can switch positions of the first member and the second member between a closed state in which the first surface and the second surface face each other, and an open state in which the first surface and the second surface are spaced apart from each other further than the first surface and the second surface in the closed state; a support holder that detachably holds the first member and the second member in the open state on a support member; a first supported and held portion provided on the first member and configured to detachably hold a supported member; Equipped with The hinge portion is A first engagement portion provided on the first member; a second engaging portion provided on the second member and engaging with the first engaging portion; the first engaging portion and the second engaging portion extend along a rotation axis about which the first member and the second member rotate, a restricting portion that restricts movement of the first engaging portion relative to the second engaging portion in a direction along the rotation axis, the supported member includes a first single pipe and a second single pipe provided at an end of the first single pipe, A holding device in which the middle part of the ladder is attached to the second single pipe via a fastener.

2. A first member having a first surface; A second member having a second surface formed thereon; a hinge portion that is connected to the first member and the second member so as to be rotatable relative to each other, and that can switch positions of the first member and the second member between a closed state in which the first surface and the second surface face each other, and an open state in which the first surface and the second surface are spaced apart from each other further than the first surface and the second surface in the closed state; a support holder that detachably holds the first member and the second member in the open state on a support member; a first supported and held portion provided on the first member and configured to detachably hold a supported member; Equipped with The hinge portion is A first engagement portion provided on the first member; a second engaging portion provided on the second member and engaging with the first engaging portion; the first engaging portion and the second engaging portion extend along a rotation axis about which the first member and the second member rotate, a holding device having a restricting portion that restricts movement of the first engaging portion relative to the second engaging portion in a direction along the rotation axis.

3. The holding device according to claim 1 or 2, further comprising a second supported and held portion provided on the second member and configured to detachably hold the supported member.

4. The holding device according to claim 1 , wherein the first member and the second member are each formed in a flat plate shape.

5. The holding device according to claim 1 or 2, wherein the first member has a first through hole formed therein, the first hole extending along the first surface and penetrating the first member.

6. The holding device according to claim 1 or 2, wherein the first member and the second member are each formed of aluminum or an aluminum alloy.

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