JP2008231853A - Opening guard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening guard which can be installed on an opening used for the attachment of a stairway of a framework scaffold no matter which type of scaffold plate is used. <P>SOLUTION: The opening guard consists of a handrail 13 on the beam side and a handrail 14 on the depth side. The handrail 13 on the beam side is constituted by providing a handrail body 12 upright to the lower frame member 11 which is arranged along the side on the beam side of the opening 7 used for the attachment of the stairway. The handrail 14 on the depth side is pivoted to the handrail body 12 of the handrail 13 on the beam side with flexible opening and closing between the use position opened at a predetermined angle and the storage position where the handrail 14 on the depth side is folded in the handrail body 12 in paralel with it. Then the handrail 14 on the depth side is arranged on the opposed side of the opening 7 used for the attachment of the stairway to the stairway-descent side. Hooks 15, 16 used for engagement are provided to the lower frame member 11 of the handrail 13 on the beam side, and the hooks 15, 16 used for engagement have hook-substrate parts 15o, 16o which are each projected from both ends of the lower frame member 11 in a slanting lower direction. Then the lower frame member 11 is positioned in a higher position than the top surface of the scaffold plate 4 in a state where both of the hooks 15, 16 used for engagement are engaged with a crosspiece 2 of a building frame 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an opening guard installed in a staircase mounting opening of a frame scaffold assembled using a building frame, and more specifically, a girder side of a stairway mounting opening formed by removing one scaffold plate. A girder-side handrail constructed by standing a handrail frame on the lower frame material arranged along the side, a use position opened at a required angle with respect to the handrail main body of this handrail, and a storage position folded in parallel within the handrail main body It is related with the opening guard as a safety handrail which consists of the wife side handrail which is pivotally attached to the handrail main body so that it can be freely opened and closed, and is disposed on the opposite side of the staircase opening.

  FIG. 6 is a perspective view showing almost the entire framework scaffold. The frame scaffold shown here has a pair of vertical members 1 and a horizontal member 2 that connects the vertical members 1 and 1 facing each other, and the opposing horizontal members 2 and 2 of the two building frames 3 and 3 are opposed to each other. The scaffolding plate 4 is bridged between the two (in the illustrated example, as shown in FIG. 4, the wide scaffolding plate 4 a and the narrow scaffolding plate 4 b are spanned in parallel) and the two building frames 3 and 3 are opposed to each other. It is possible to assemble the multi-stage structure by stretching the streaks 5 between the vertical members 1 and 1, but when assembling the frame scaffolding, install the stairs 6 used for ascending and descending to the scaffolding plate 4 of each stage. In order to do this, remove one of the scaffold plates 4 from each stage of the scaffold (in the example shown, remove one of the wide scaffold plate 4a and the wide scaffold plate 4b of the narrow scaffold plate 4b) A) Stair mounting openings 7 are formed, and each stair mounting opening 7 is used to set the stair 6 at a predetermined angle. In each staircase mounting opening 7, an opening guard 18 as a safety handrail is installed across the end of the spar adjacent to the narrow scaffolding plate 4b and the end of the wife on the opposite side of the stairway entrance side. To do.

  As a conventional opening guard, there is no specific publicly known document such as a patent publication, but FIG. 4 (a) shows a conventional opening guard 18 and its installed state. FIG. 7A is a plan view showing a part of the mounting state of the conventional opening guard 18, and FIG. 7B is a sectional view taken along line YY of FIG. As can be seen from FIG. 4 (a), this conventional opening guard 18 has a girder in which a handrail body 12 is erected on a lower frame member 11 arranged along the girder side of the staircase mounting opening 7. A handrail body that can be freely opened and closed between a side handrail 13 and a use position opened at a required angle as shown in FIG. 4A with respect to the handrail body 12 of the girder side handrail 13 and a storage position folded in parallel in the handrail body 12. 12 and a wife-side handrail 14 disposed on the opposite side of the stairway ascending opening side of the staircase mounting opening 7, and both ends of the lower frame member 11 of the girder-side handrail 13, As shown in FIG. 4 (a), locking hooks 30, 30 that are locked to the facing horizontal members 2, 2 of both building frames 3, 3 are provided coaxially with the lower frame material 11.

  The wife-side handrail 14 includes a fixed pipe portion 17a pivotally attached to the handrail main body 12 side of the girder-side handrail 13, and a telescopic pipe portion 17b that is fitted and inserted into the fixed pipe portion 17a so as to be fixed at a required expansion / contraction position. And a substantially Y-shaped locking member 50 is attached to the distal end portion of the telescopic tube portion 17b, and the building frame 3 is extended vertically while the telescopic tube portion 17b in a contracted state is extended. It approaches and locks the material 1, and it fixes with the fixing screw (not shown).

  At both ends of the scaffold plate 4, hooks 40, 40 for locking to the opposite cross members 2, 2 of both building frames 3, 3 are attached to both ends of each end surface of the scaffold plate 4, As shown in FIG. 7 (a), both hooks 40, 40 at the end of each wife are attached at a position where one of the hooks 40 enters slightly inside the end of the wife. The other locking hook 40 is attached to a position protruding slightly outward from the end of the wife. As can be seen by referring to the narrow scaffold plate 4b in FIG. 7 (a), the opposite end portions of the scaffold plates 4 and 4 arranged on both sides of the cross member 2 of the building frame 3 are sandwiched. This is because the locking hooks 40, 40 are adjacent to each other in opposite directions and locked to the same cross member 2 from both sides. In such a case, a relatively wide gap S is formed between the two scaffold plates 4, 4 (in the illustrated example, the wide scaffold plate 4a and the narrow scaffold plate 4b) arranged in parallel. ing.

  Therefore, when the conventional opening guard 18 is installed, in order to arrange the lower frame member 11 of the spar-side handrail 13 along the spar-side side of the staircase mounting opening 7, (a) in FIG. As shown in a), by using the relatively wide gap S formed between the scaffolding plates 4 and 4 as described above, the lower frame member 11 is flush with the scaffolding plate and on the spar attachment side of the staircase mounting opening 7. It arrange | positions along a side and the hooks 40 and 40 for latching of both ends are latched to the cross members 2 and 2 which both building frames 3 and 3 oppose.

  However, recently used scaffolding plates have two scaffolding plates 4 and 4 arranged in parallel between the facing members 2 and 2 of both building frames 3 and 3 as shown in FIG. The hooks 40 are attached so that there is almost no gap between the end portions of the girders between the scaffolding plates 4 and 4 when they are hung, and the end portions of the scaffolding plates 4 and the side of the building frame 3 are attached. There is provided a scaffold plate 4 provided with a closing plate 31 at the end of the wife side so that there is no gap between the material 2. However, in the case of the scaffolding plate 4 in which a gap is not formed between the girder side ends of the scaffolding plates and between the end side of each scaffolding plate and the cross member 2 of the building frame 3 in this way, There was a problem that the lower frame member 11 of the opening guard 18 could not be bridged between the cross members 2 and 2 of the building frames 3 and 3 facing each other along the spar side of the staircase mounting opening 7.

  In view of the above-described problems, the present invention also aims to provide an opening guard that can be installed in the staircase mounting opening 7 regardless of what type of scaffolding plate is used.

Means for solving the above-described problems will be described with reference numerals in the embodiments described later. The invention according to claim 1 relates to the staircase attachment opening 7 of the frame scaffolding assembled using the building frame 3. An opening guard installed on the lower frame material 11 disposed along the side of the spar of the staircase mounting opening 7, It is pivotally attached to the handrail main body 12 so as to be freely opened and closed between a use position opened at a required angle with respect to the handrail main body 12 and a storage position folded in parallel in the handrail main body 12, and is opposite to the stairway entrance side of the staircase mounting opening 7. In the opening guard consisting of the wife side handrail 14 arranged in
The lower frame member 11 of the girder-side handrail 13 is provided with locking hooks 15 and 16 having hook substrate portions 15o and 16o that project obliquely downward from both ends thereof, and both the locking hooks 15 and 16 are both built. It is characterized in that the lower frame member 11 is positioned higher than the upper surface of the scaffold plate 4 in a state of being locked to the opposite cross members 2 and 2 of the frames 3 and 3.

  Claim 2 is the opening guard according to claim 1, wherein the wife-side handrail 14 includes a fixed pipe portion 17a pivotally attached to the handrail main body 12 side of the girder-side handrail 13, and a required expansion / contraction to the fixed pipe portion 17a. The upper frame member 17 is composed of an expandable tube portion 17b that is fixedly inserted at a position, and a building frame is provided at the distal end portion of the expandable tube portion 17b of the upper frame member 17 at the use position of the wife side handrail 14. A substantially C-shaped locking member 19 that is locked from the back side of the vertical member 1 is attached to the vertical member 1, and this C-shaped locking member 19 is locked to the vertical member 1 in this state. A fixing screw 20 for fixing the C-shaped locking member 19 to the longitudinal member 1 is provided.

  The effect of the invention by the above-described solution means will be described with reference numerals in the embodiments described later. According to the invention according to claim 1, in installing the opening guard 8 in the staircase mounting opening 7 of the frame scaffold. The lower frame member 11 of the spar-side handrail 13 is arranged along the spar-side end portion of the staircase mounting opening 7, and the hooks 15, 16 for locking at both ends of the lower frame member 11 are attached to both the building frames 3, 3. The lower frame member 11 as a whole is positioned higher than the upper surface of the scaffolding plate 4 with both hooks 15 and 16 being locked to both the cross members 2 and 2 when locked to the opposite cross members 2 and 2. Therefore, the hooks 15 and 16 for locking can be inserted into a narrow gap between the two scaffolding plates 4a and 4b arranged side by side on the cross member 2 of the building frame 3, so that the handrail on the spar side 13 can be attached, and the opening guard 8 can be installed.

  According to the invention according to claim 2, the C-shaped locking member 19 at the tip of the wife-side handrail 14 is fixed to the longitudinal member 1 to fix the tip of the wife-side handrail 14 to the vertical member 1 of the building frame 3. By locking from the back side and fixing with the fixing screw 20, even if the fixing screw 20 is loosened, the C-shaped locking member 19 does not come off from the vertical member 1, and therefore the opening guard 8 may fall down. No safety is ensured.

  A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 (a) is a front view of an opening guard according to the present invention, (b) is a side view, and FIG. The top view which shows a part of attachment state of the opening guard shown in FIG. 1, (b) is XX sectional drawing of (a). FIG. 4B shows an opening guard according to the present invention. The opening guard of the present invention indicated by 8 in these drawings is a girder handrail 13 in which a handrail body 12 is erected on a lower frame member 11 arranged along the girder side of the staircase mounting opening 7; The handrail main body 12 of the girder side handrail 13 is pivotally attached to the handrail main body 12 so as to be freely opened and closed between a use position opened as shown in FIG. 4B and a storage position folded in parallel in the handrail main body 12. 4 and is arranged on the opposite side of the lower frame member 11 of the girder-side handrail 13 (FIG. 4). As shown in FIG. 2 (b), plate-like locking hooks 15 and 16 having hook substrate portions 15o and 16o respectively projecting obliquely downward from both ends of the lower frame member 11 are provided. ) As shown in the figure, the lower frame member is in a state in which both hooks 15 and 16 are locked to the cross member 2 of the building frame 3. 1 is adapted to position the upper than the upper surface of the scaffold plate 4.

  The structure of the opening guard 8 will be described further. The locking hook 15 provided on one end side of the lower frame member 11 of the girder-side handrail 13 is locked with the cross member 2 of the building frame 3. A locking lock 16 provided on the other end side of the lower frame member 11 is provided with a well-known drop lock (can be raised and lowered and slid downward and locked by its own weight) G. Does not have a falling tablet. Further, the locking hook 16 provided on the other end side of the lower frame member 11 is detachably attached via an attachment member 34.

  The handrail body 12 of the girder-side handrail 13 is formed in a rectangular frame shape by both vertical frame portions 12a and 12b, an upper horizontal frame portion 12c, a middle horizontal frame portion 12d, and a middle vertical frame portion 12e. The wife-side handrail 14 is formed of an upper frame member 17, a lower frame member 24 a, and a vertical frame member 24 b in a substantially U shape, and the upper frame member 17 is pivoted to the handrail body 12 side of the girder-side handrail 13. The fixed tube portion 17a is attached to the distal end portion of the expandable tube portion 17b. The expandable tube portion 17b is inserted into the fixed tube portion 17a so as to be freely rotatable and fixed at a required expansion / contraction position. A substantially C-shaped locking member 19 adapted to be locked from the back side to the vertical member 1 of the building frame 3 at the use position of the wife side handrail 14 as shown in FIG. A butterfly bolt for fixing the locking member 19 to the vertical member 1 while being fixed to the vertical member 1 of the building frame 3. A fixing screw 20 is provided.

  The fixing tube portion 17a of the upper frame member 17 is provided with a fixing screw 22 composed of a butterfly bolt for fixing the expansion / contraction tube portion 17b to the fixed tube portion 17a at a required expansion / contraction position and a required angle rotation position. Yes. The C-shaped locking member 19 is held and fixed to the middle horizontal frame portion 12e of the handrail main body 12 by the detachable pin 32 in a state where the wife-side handrail 14 is folded and stored in the girder-side handrail 13. It has become. As shown in FIG. 3C, the detachable pin 32 is inserted through the insertion hole 33 of the C-shaped locking member 19 from the middle horizontal frame portion 12e.

  As can be seen from FIG. 1 (a), the wife-side handrail 14 has a base end portion of the fixed tube portion 17a of the upper frame member 17 at an end portion of the upper horizontal frame portion 12c of the handrail main body 12, and a lower frame member. The base end portion of 24a is pivotally attached to the end portion of the middle horizontal frame portion 12d of the handrail main body 12 by the pivot shaft 23, so that the handrail main body 12 and the use position opened at a required angle with respect to the handrail main body 12 of the handrail 13 are installed. It can be freely opened and closed to a storage position that is folded in parallel.

  The use of the opening guard 8 configured as described above will be described with reference to FIGS. 2 (a) and 2 (b) and FIG. 4 (b). 2 and 4, the scaffolding plate 4 of the frame scaffolding has two scaffolding plates 4 and 4 juxtaposed between the opposing cross members 2 and 2 of the two building frames 3 and 3 (in this case, wide) As shown in FIG. 2 (a), when the scaffolding plate 4a and the narrow scaffolding plate 4b are stretched over each other, a slight gap is formed between the end portions of the spar between the scaffolding plates 4a and 4b. The locking hook 40 is attached so that only the s can be made, and at the end of the wives so that there is almost no gap between the end of the end of each scaffolding plate 4a, 4b and the cross member 2 of the building frame 3. This is a scaffolding plate in which a closing plate 31 is provided and the conventional opening guard 18 ((a) in FIG. 4) cannot be used.

  Therefore, in order to install the opening guard 8 according to the present invention in each stair mounting opening 7 of the frame scaffold as shown in FIG. ) And FIG. 4 (b), the hooks for locking at both ends of the lower frame member 11 are arranged along the end of the lower frame member 11 adjacent to the narrow scaffolding plate 4b of the opening 7 for stair mounting. 15 and 16 are locked to the opposite cross members 2 and 2 of the building frames 3 and 3. At this time, since the entire lower frame member 11 is positioned higher than the upper surface of the scaffolding plate 4 in a state where both the locking hooks 15 and 16 are locked to the both lateral members 2 and 2, the locking hook 15 , 16 can be inserted into a narrow gap between the two scaffolding plates 4a, 4b arranged in parallel to the cross member 2 of the building frame 3, as can be seen from FIG. 13 can be attached, so that the opening guard 8 can be installed.

  In this way, the hooks 15 and 16 for locking the upper frame member 17 are locked to the opposing cross members 2 and 2 of the two building frames 3 and 3, so that they are attached to the end portion of the stairs mounting opening 7 of the spar-side handrail 13. After the installation, the wife side handrail 14 in the storage position is rotated by a required angle about the pivot 23, and as shown in FIG. 4 (b), the telescopic tube portion 17b of the upper frame member 17 is The C-shaped locking member 19 at the distal end is appropriately extended to a position where it passes over the longitudinal member 1 of the building frame 3, and then the telescopic tube portion 17b is contracted to construct the C-shaped locking member 19 at the distal end. The vertical member 1 of the frame 3 is locked from the back side, and in this locked state, the fixing screw 20 is tightened to fix the C-shaped locking member 19 to the vertical member 1. Further, the telescopic tube portion 17b is fixed to the fixed tube portion 17a by tightening the fixing screw 22.

  As described above, the C-shaped locking member 19 at the front end portion of the wife side handrail 14 is engaged with the vertical member 1 from the back side thereof in order to fix the front end portion of the wife side handrail 14 to the vertical member 1 of the building frame 3. If the fixing screw 22 is fixed and the fixing screw 22 is loosened, the C-shaped locking member 19 will not be detached from the vertical member 1 even if the fixing screw 22 is loosened, and therefore the possibility that the opening guard 8 will fall is eliminated. Incidentally, in the wife side handrail 14 of the conventional opening guard 18, as shown in FIG. 4 (a), a Y-shaped locking member 50 is attached to the distal end portion of the telescopic tube portion 17b, so that it is in a contracted state. Since a certain telescopic pipe portion 17b is extended and locked to approach the vertical member 1 of the building frame 3 and fixed with a fixing screw, the locking member is used when the fixing screw is loosened by vibration or the like. There is a possibility that 50 is detached from the longitudinal member 1 and the opening guard 18 falls down.

(a) is a front view of the opening guard based on this invention, (b) is a side view. U (a) is a top view which shows a part of attachment state of the opening guard shown in FIG. 1, (b) is XX sectional drawing of (a). (a) is a sectional view taken along the line ZZ of (b), (b) is a partially enlarged front view of the wife side handrail housed in the handrail of the girder side, and shows the state where the C-shaped locking member is in a horizontal position. Show. The perspective view which shows the conventional opening guard and its installation state, (b) is a perspective view which shows the installation state of the opening guard which concerns on this invention. It is a perspective view which shows the use condition of the opening guard which concerns on this invention. It is a perspective view which shows the whole frame scaffold. It is a top view which shows a part of attachment state of the conventional opening guard, (b) is the YY sectional view taken on the line of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vertical material of building frame 2 Horizontal material of building frame 3 Building frame 4 Scaffold board 4a Wide scaffold board 4b Narrow scaffold board 5 Staggered 6 Stairs 7 Stair mounting opening 8 Opening guard 11 Lower frame material 12 Handrail according to the present invention Main body 13 Girder-side handrail 14 Wife-side handrails 15 and 16 Locking hook 15o Hook substrate portion 16o Hook substrate portion 17 Upper frame material 18 of the wife-side handrail Conventional opening guard 19 Locking member 20 Fixing screw

Claims (2)

An opening guard installed at the staircase mounting opening of a frame scaffold that is assembled using a building frame, and the handrail body is erected on the lower frame material arranged along the girder side of the stairway mounting opening. The handrail body is pivotally attached to the handrail body so that it can be opened and closed between the handrail body of the handrail and the use position opened at a required angle with respect to the handrail body of the handrail and the storage position folded in parallel with the handrail body. In the opening guard composed of the wife side handrail arranged on the side opposite to the stairway entrance side,
The lower frame material of the girder-side handrail is provided with locking hooks having hook substrate portions that project obliquely downward from both ends thereof, and both locking hooks are locked to the opposite horizontal members of both building frames. The opening guard is configured such that the lower frame material is positioned higher than the upper surface of the scaffolding plate.   The wife-side handrail has an upper frame member composed of a fixed pipe portion pivotally attached to the handrail body side of the girder-side handrail and an expandable pipe portion that is fitted and inserted into the fixed pipe portion so as to be fixed at a required expansion / contraction position. In addition, a substantially C-shaped locking member is configured to be locked to the vertical member of the building frame from the back side at the end of the telescopic tube portion of the upper frame member at the use position of the wife side handrail. The opening guard according to claim 1, wherein a fixing screw is provided on the C-shaped locking member to fix the C-shaped locking member to the vertical member in a state of being locked to the vertical member.

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