JP2012219455A - Safety handrail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate exchange of a hook piece more than in the conventional manner, concerning a safety handrail attached to a framework scaffold used in a construction site or a civil engineering work.SOLUTION: A safety handrail A is attached to a framework scaffold comprising: a plurality of frame bodies B each consisting of a pair of front and rear stringers 1, 1 and horizontal members 2 installed between the stringers 1, 1 and arranged in line laterally; and a scaffold board 3 installed between the horizontal members 2, 2 of the frame bodies B, B facing each other. The safety handrail A comprises: a handrail body 4 arranged between the stringers 1, 1 of the frame bodies B, B facing each other; and a pair of left and right hooks 5l, 5r attached to a pair of left and right vertical supports 40l, 40r of the handrail body 4, respectively, and hooked on the horizontal members 2, 2 facing each other. Each of the hooks 5l, 5r consists of a base end side part 50 fixed to each of the vertical supports 40l, 40r and a hook member 51 having a hook piece 51a detachably attached to the base end side part 50 and hooked on the horizontal member 2.

Description

  The present invention relates to an improvement in a safety handrail attached to a framework scaffold used in a construction site or civil engineering work.

  A safety handrail attached to a frame scaffold used in a construction site or civil engineering works, for example, as disclosed in Patent Document 1, from a pair of longitudinal members and a horizontal member constructed between these longitudinal members. It is attached to a frame scaffold comprising a plurality of frames arranged in a horizontal direction and a scaffold plate constructed between horizontal members of opposing frames.

  And the said safety handrail is provided with the handrail main body arrange | positioned between the vertical members of the frame body which opposes, and the hook which is each attached to the left-right pair of vertical support | pillar of this handrail main body, and hooks on the opposing horizontal member.

  As shown in FIG. 3 of Patent Document 1, the hook includes a base end portion that is welded and fixed to a reinforcing member that is welded and fixed to the vertical support, and a base end portion that is integrally connected to the base end portion. And a hook piece to be caught on the frame.

JP 2006-328652 A

  However, in the conventional safety handrail, when the hook piece of the hook is easily deformed and the hook piece needs to be replaced, the hook piece is integrally formed and welded and fixed to the vertical member. Is difficult.

  Accordingly, an object of the present invention is to provide a safety handrail capable of making the replacement of the hook piece easier than before.

  Means for solving the above-mentioned problems include a frame body comprising a pair of front and rear longitudinal members and a horizontal member laid between these longitudinal members and arranged in a plurality of rows in the horizontal direction, and the above-mentioned frame members facing each other. A safety handrail attached to a frame scaffold including a scaffolding plate laid between horizontal members, a handrail main body disposed between the vertical members of the opposing frame body, and a pair of left and right handrail main bodies A safety handrail provided with a pair of left and right hooks that are respectively attached to the opposite vertical struts and hooked on the opposite horizontal struts, a base end side member that is fixed to the vertical struts, and a base end side member And a hooking member having a hook piece that is detachably mounted and hooked on the horizontal member.

  According to the present invention, since the hook member having the hook piece is detachably attached to the base end side member fixed to the vertical column, when the hook piece is replaced, the hook member may be replaced. It is possible to replace the pieces more easily than in the past.

It is a perspective view which shows the state which attached the safety handrail which concerns on one embodiment of this invention to the frame scaffold. (A) is a top view which expands and shows the hook of the left side in the safety handrail which concerns on one embodiment of this invention, (b) is a front view of (a). (A) is a top view which expands and shows the right hook in the safety handrail which concerns on one embodiment of this invention, (b) is a front view of (a). It is a front view which shows the safety handrail which concerns on one embodiment of this invention. It is the XX 'line | wire cut part end elevation of FIG. (A) is a top view which expands and shows the right side frame pressing metal fitting in the safety handrail which concerns on one embodiment of this invention, (b) is a front view of (a). (A) is a top view which expands and shows the left metal fitting in the safety handrail which concerns on one embodiment of this invention, (b) is a front view of (a). (A) is a top view which expands and shows the right metal fitting in the safety handrail which concerns on one embodiment of this invention, (b) is a front view of (a).

  Hereinafter, a safety handrail showing an embodiment of the present invention will be described with reference to the drawings. The same reference numerals given throughout the several drawings indicate the same or corresponding parts.

  As shown in FIG. 1, the safety handrail A according to the present embodiment includes a pair of front and rear vertical members 1, 1 and a horizontal member 2 laid between the vertical members 1, 1. It is attached to a frame scaffold comprising a frame B arranged in series and a scaffold plate 3 constructed between the horizontal members 2 and 2 of the opposed frames B and B.

  The safety handrail A is attached to a handrail main body 4 disposed between the vertical members 1 and 1 of the opposing frame bodies B and B, and a pair of left and right vertical struts 40l and 40r of the handrail main body 4, respectively. A pair of left and right hooks 5l and 5r that are hooked on the facing horizontal members 2 and 2 are provided.

  Then, as shown in FIGS. 5r includes a base end member 50 fixed to the vertical struts 40l and 40r, and a hook member 51 having a hook piece 51a that is detachably attached to the base end member 50 and is hooked on the horizontal member 2. .

  Describing in detail below, the safety handrail A according to the present embodiment, as shown in FIG. 1, is assembled from a lower-stage scaffolding plate (not shown) when the frame scaffold is assembled in a multi-stage shape. It is attached as a temporary temporary handrail for the newly installed upper stage scaffolding plate 3.

  As described above, the safety handrail A includes the handrail main body 4 disposed between the opposing vertical members 1 and 1, and attachment means for attaching the handrail main body 4 to the frame scaffold.

  As shown in FIG. 4, the handrail body 4 includes a pair of left and right vertical struts 40l and 40r, a handrail rod 41 spanned between the upper ends of the vertical struts 40l and 40r, and the vertical struts 40l and 40r. The upper and lower horizontal linkages 42 and 43 are installed on the left and right sides, and the left and right vertical linkages 44 and 45 are installed between the horizontal linkages 42 and 43.

  Further, as shown in FIG. 5, the vertical struts 40l and 40r are made of hollow pipes, and reinforcing members 46 are inserted into the vertical struts 40l and 40r, respectively.

  FIG. 5 shows only the right vertical column 40r, but the reinforcing member 46 is also inserted into the left vertical column 40l in the same manner as the right vertical column 40r (FIG. 4).

  These reinforcing members 46 are made of hollow pipes, and are arranged from the lower horizontal joint 43 to the approximate center of the vertical struts 40l and 40r as shown in FIG.

  The attachment members for attaching the handrail main body 4 to the frame scaffolding are attached to the vertical struts 40l and 40r. From the upper side in FIG. 4, a pair of left and right frame pressers 6l and 6r, a pair of left and right hooks 5l and 5r, and a pair of left and right The metal fittings 7l and 7r.

  As shown in FIG. 6, each of the frame holding metal fittings 6 l and 6 r is formed of a pair of front and rear holding metal fittings 60 and 61 that are opposed to each other, and vertical struts 40 l and 40 r that connect these holding metal fittings 60 and 61. Side bolts 62 and 63 on the side of the vertical member 1, bolts 64 penetrating the base end portions of the holding metal fittings 60 and 61 and penetrating the vertical struts 40 l and 40 r back and forth, and screwed at the ends of the bolts 64. And a mating nut 65.

  Although FIG. 6 shows only the right frame retainer 6r, the left frame retainer 6l is symmetrical to the right frame retainer 6r and has the same configuration.

  Then, the end portions of the holding metal fittings 60 and 61 are separated from each other, and the vertical struts 40l and 40r side ends of the installation piece 62 are curved along the outer circumferences of the vertical support posts 40l and 40r. The material side 1 and 1 end portions are curved so as to follow the outer periphery of the longitudinal members 1 and 1, and the frame holding metal fittings 6l and 6r are provided with vertical columns 40l and 40r between the base end parts of the holding metal fittings 60 and 61, respectively. The bolts are fixed in the arranged state, and the longitudinal members 1 and 1 are supported by the distal end portions of the holding metal fittings 60 and 61 and the curved end portions of the installation piece 63.

  Further, the hooks 5l and 5r arranged below the frame holding metal fittings 6l and 6r are positioned substantially at the center of the reinforcing member 46, and are shown in FIGS. The base end side member 50 fixed to 40l, 40r, and the hook member 51 which has the hook piece 51a attached to this base end side member 50 so that attachment or detachment is possible and hooked on the said horizontal member 2 are comprised.

  The proximal end side member 50 has a curved piece 50a along the outer periphery of the vertical struts 40l and 40r, and a pair of front and rear facing each other extending from the curved piece 50a. The holding members 50b and 50c are provided, and the hook member 51 is held between the holding pieces 50b and 50c.

  The curved piece 50a is welded and fixed to the outer peripheral front surfaces (scaffold plate side) of the vertical struts 40l and 40r, and the base end side member 50 has the rivet 52 with the hook member 51 sandwiched between the holding pieces 50b and 50c. , The hook member 51 is clamped between the clamping pieces 50b and 50c.

  Further, the sandwiching pieces 50b, 50b are disposed obliquely from the curved piece 50 to the front side (scaffold plate side).

  The hook member 51 is formed in an arc shape and hooked to the opposing horizontal member 2 and a connecting portion extending from the hook piece 51a and sandwiched between the sandwiching pieces 50b and 50c. 51b.

  The hook piece 51 a is arranged so as to be orthogonal to the horizontal member 2, and its lower surface is formed in a substantially semicircular shape and is set so as to contact the upper semi-periphery surface of the horizontal member 2.

  Moreover, the said connection part 51b is diagonally arrange | positioned from the said hook piece 51a to the back | inner side (anti-scaffold board side) so that the said clamping pieces 50b and 50c may be followed.

  In the present embodiment, the shapes of the hook members 51, 51 in the left and right hooks 51, 5r are slightly different, and the connecting portion 51b of the left hook 51 (FIG. 2) is the connecting portion of the right hook 5r (FIG. 3). The hook piece 51a of the left hook 5l is disposed closer to the front side (scaffold plate side) than the hook piece 51a of the right hook 5r by the thickness before and after the hook piece 51a.

  Further, as shown in FIG. 3, in the right hook 5r, a protrusion 51c serving as a misassembly prevention means is provided on the back surface (side surface of the anti-scaffold plate) of the hook piece 51a.

  Further, the metal fittings 7l and 7r attached to the lower side of the hooks 5l and 5r are arranged so as to be shifted up and down in order to avoid the brace 8 attached between the vertical members 1 and 1, as shown in FIG. The

  Further, on both sides of the rivet 52, there are formed first and second engaging portions for engaging the connecting portion 51b and the holding pieces 50b, 50c, and the first engaging portion is the tip of the connecting portion 51b. It is composed of a fitting groove 51d formed on the front side of the part and a fitting piece 50d formed on the base end of the holding piece 50b on the front side (lower side in FIGS. 2A and 3A).

  On the other hand, the second engaging part is composed of a pair of projecting parts 51e and 51f projecting from the front side and the back side of the base part of the connecting part 51b, and the distal ends of both sandwiching pieces 50b and 50c.

  When the connecting portion 51b is sandwiched between the sandwiching pieces 50b and 50c, the fitting piece 50d formed at the base end portion of the front sandwiching piece 50b is fitted into the fitting groove 51d, and each sandwiching piece The tips of 50b and 50c come into contact with the protrusions 51e and 51f, respectively.

  As shown in FIGS. 7 and 8, each of the metal fittings 7 l and 7 r is extended to the annular annular portion 70 through which the lower ends of the vertical struts 40 l and 40 r are inserted, and the longitudinal member 1 facing the annular portion 70. The extended portion 71 is extended from the rear side (anti-scaffold plate side) end of the extended portion 71 to the front side (scaffold plate side) while being curved along the outer peripheral back surface of the longitudinal member 1. It comprises a holding piece 72 and a support piece 73 extending from the front side (scaffold plate side) end portion of the extending portion 71 so as to face the front end portion of the holding piece 72.

  Then, in the state where the vertical members 1 and 1 are held by the holding pieces 72 and 72 of the metal fittings 7l and 7r, the holding pieces 72 and 72 are inserted from the holes 73a penetrating the support pieces 73 and 73 to the left and right. By driving the wedges 74 and 74 through the hole 72a penetrating the tip portion in the left and right directions, the metal fittings 7l and 7r can be fixed to the vertical members 1 and 1, respectively.

  Further, the vertical struts 40l and 40r of the handrail body A, to which the hooks 5l and 5r are attached, are inserted into the annular portions 70 and 70 of the double metal fittings 7l and 7r fixed to the vertical members 1 and 1, respectively. By hooking 5r to the opposing horizontal members 2 and 2, the safety handrail of the upper scaffolding plate 3 newly installed from the already installed scaffolding plate can be attached in advance.

  That is, in the present embodiment, the vertical struts 40l and 40r constituting the handrail main body 4 are made of hollow pipes, and the reinforcing members 46 for reinforcement are inserted into the vertical struts 40l and 40r, so that strength is required. Only a part of the vertical struts 40 l and 40 r can be reinforced by the reinforcing member 46.

  Therefore, even if the thickness of the vertical struts 40l and 40r is reduced, it is possible to withstand the impact when the operator falls from the scaffold plate, and the safety handrail A can be reduced in weight.

  Further, in the present embodiment, the reinforcing member 46 is provided from the lower part of the vertical struts 40 l and 40 r to substantially the center, and the hooks 5 l and 5 r are located substantially at the center of the reinforcing member 46.

  Therefore, when the impact when the operator falls from the scaffolding plate acts on the handrail body 4, it is possible to reliably prevent the vertical struts 40l and 40r from falling over by the reinforcing member 46.

  Further, in the present embodiment, the hook 5 is composed of a base end side member 50 welded and fixed to the vertical struts 50l and 50r, and a hook member 51 detachably mounted on the base end side member 50. A hook piece 51 a that is hooked on the horizontal member 2 is formed on the member 51.

  Therefore, when the hook piece 51a is deformed, it is only necessary to replace the hooking member 51. The hooking member 51 is fixed to the base member 50 by the rivet 52, and thus is fixed to the vertical member by welding. Compared to the conventional hook, the hook piece 51a can be easily replaced.

  Further, in the right hook 5r in the present embodiment, since the protrusion 51c is provided on the back surface of the hook piece 51a, when the right hook 5r and the left hook 5l are hooked on the same horizontal member 2, The protrusion 51c makes it possible to prevent the hook piece 51a of the left hook 6l from being arranged on the back side (the anti-scaffold plate side) of the right hook 5r, that is, misassembly.

  Further, in the present embodiment, the misassembly prevention means includes the projection 51c, so that a gap is formed between the left and right hook pieces 51a and 51a that are hooked on the same horizontal member 2 when misassembled. Is easy.

  Further, in the present embodiment, the projection 51c serving as a misassembly prevention means is disposed on the back surface of the hook piece 51a in the right hook 5r located on the back side (scaffold plate side), and thus the hook piece in the left hook 5l. Compared with the case where a protrusion is formed on the front surface of 51a, it does not hinder the wedge 74 from being driven into the metal fitting 7l.

  In addition, when an operator who connects the base end of the lifeline to the handrail rod 41 falls from the scaffold plate 3, a force acts in a twisting direction on the hooks 5 l and 5 r, but in the present embodiment, on both sides of the rivet 52. Since the engaging portion is formed, the force applied in the vertical direction is P, the width between the center of the horizontal member 2 and the rivet 52 is l, and the height of the connecting portion 51b is h (FIG. 2 (b), 3 (b)), the horizontal force RH represented by Pl / h can be borne by both engaging portions.

  Therefore, the rivet 52 only needs to bear the vertical force P, and the force applied to the rivet 52 when the operator falls can be reduced.

  Although preferred embodiments of the present invention have been described in detail above, it should be understood that modifications, variations and changes may be made without departing from the scope of the claims.

  For example, in the above embodiment, the reinforcing member 46 is made of a hollow pipe, but it may be made of a solid columnar member, and the shape and length of the reinforcing member 46 can be appropriately selected.

  In the above embodiment, the misassembly prevention means is made of the protrusion 51c. However, the present invention is not limited to this, and the right and left hooks 5l and 5r may be colored to prevent misassembly, and the protrusion 51c is provided. The position is not limited to the illustration.

  Although not shown in the drawings, the misassembly prevention means may be provided with a protrusion on one facing surface of the left and right hooks 5l and 5r facing each other at the correct mounting position, and a groove for engaging the protrusion on the other facing surface. In this case, it is possible to determine that the projection is incorrect when the projection does not engage with the groove.

A Safety handrail B Frame 1 Vertical member 2 Horizontal member 3 Scaffolding plate 4 Handrail main body 5l, 5r Hook 6l, 6r Frame presser fitting 7l, 7r Bracket 40l, 40r Vertical column 41 Handrail rod 50 Base end side member 50a Curved piece 50b, 50c Holding piece 51 Hooking member 51a Hook piece 51b Connecting portion 51c Protrusion 52 Rivet 60, 61 Holding metal fittings 62, 63 Installation piece 70 Annular part 71 Extension part 72 Holding piece 73 Supporting piece 74 Wedge

Claims (5)

A frame body (B) comprising a pair of front and rear longitudinal members (1), (1) and a transverse member (2) constructed between these longitudinal members (1), (1) and arranged in a plurality of rows in the transverse direction. ) And a scaffolding plate (3) installed between the horizontal members (2) and (2) of the opposing frames (B) and (B), a safety handrail (A And a pair of left and right handrail bodies (4) disposed between the longitudinal members (1) and (1) of the opposed frame bodies (B) and (B), and the handrail body (4). In a safety handrail (A) comprising a pair of left and right hooks (5l) and (5r) hooked on the horizontal members (2) and (2) facing and attached to the vertical struts (40l) and (40r), respectively ,
The hooks (5l) and (5r) are fixedly attached to the vertical struts (40l) and (40r), and the base end side member (50) is detachably attached to the base end side member (50). A safety handrail comprising a hook member (51) having a hook piece (51a) that is hooked on the base material (2).   The base end side member (50) is formed in an arc shape and the curved piece (50a) along the outer periphery of the vertical struts (40l) and (40r) is extended from the curved piece (50a) and before and after facing. A safety handrail comprising a pair of sandwiching pieces (50b) and (50c), wherein the hook member (51) is sandwiched between the sandwiching pieces (50b) and (50c).   The hook member (51a) is formed in an arc shape and hooked on the horizontal member (2), and the hook pieces (50b), (50c) are extended from the hook piece (51a). The safety handrail according to claim 2, further comprising a connecting portion (51b) sandwiched between the two. The base end member (50) holds the hook member (51) by hitting a rivet (52) with the connecting portion (51b) sandwiched between the sandwiching pieces (50b), (50c). ,
On both sides of the rivet (52), there are formed first and second engaging portions for engaging the connecting portion (51b) with the clamping pieces (50b), (50c). The safety handrail according to claim 3. The first engaging portion includes an engaging groove (51d) formed at a distal end portion of the connecting portion (51b) and a fitting piece (formed at a proximal end portion of the one sandwiching piece (50b)). 50d)
The second engaging portion includes a pair of projecting portions (51e) and (51f) projecting from both surfaces of the base end portion of the connecting portion (51b), and the both sandwiching pieces (50b) and (50c). )
When the connecting portion (51b) is sandwiched between the sandwiching pieces (50b) and (50c), the fitting piece (50d) is fitted into the fitting groove (51d), and each of the sandwiching pieces is 5. The safety handrail according to claim 4, wherein tips of (50 b) and (50 c) are in contact with the protrusions (51 e) and (51 f), respectively.

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