JP2005273365A - Preceding handrail of prefabricated scaffolding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a preceding handrail which has excellent moving operation of a handrail post to an upstairs floor of a prefabricated scaffolding and is easily handled. <P>SOLUTION: The preceding handrail 1 comprises a plurality of handrail posts 8 which are removably fixed to posts 3 of standards 2; and extensible cross bars 9 which are installed between the respective handrail posts 8. The handrail post 8 is provided with an engaging hook 10 which holds the post 3 of the standard 2 and engages with a horizontal member 5 of the post 2. The engaging hook 10 is pivotably moved downwardly and has a spring which enables the pivotaly moved engaging hook 10 to return to an original position. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a handrail for a framework scaffold installed along an outer wall of a building in a construction field such as civil engineering and architecture.

  At the construction site of civil engineering and construction, the framework scaffolding is constructed and constructed by connecting the required number of framework scaffolds in the upward and horizontal directions. I work on the scaffold.

  However, the uppermost scaffold may not have safety pillars and handrails around it, and there is a danger of terrifying the work and falling. Therefore, a handrail can always be installed around the uppermost scaffold so that the danger can be avoided and the work can be performed safely, even during the assembly or disassembly work of the frame scaffold. Various leading handrails have been proposed.

For example, in Patent Document 1, as shown in FIG. 8, a plurality of handrail pillars 104 that can be detachably fixed to the leg pillars 103 of the building frame 102, and pipes with different diameters that connect these handrail pillars 104 are expanded and contracted. A telescopic handrail 105 which is freely inserted and inserted, and a preceding handrail 101 of a frame scaffolding composed of a telescoping handrail are shown. According to the preceding handrail 101, when assembling the frame scaffolding, if one handrail column 104 is moved to the upper stage scaffolding side, the telescopic handrail 105 connected to both sides of the handrail pillar 104 extends accordingly, Each handrail column 104 can always be kept connected by the telescopic handrail 105, a handrail without a break is formed over the entire length, and safety is high and a moving operation is also simple.
JP 2001-288883 A

  However, in the preceding handrail 101, when the handrail pillar 104 is lifted along the leg pillar 103 of the building frame 102, the fixing member 107 for locking to the horizontal member 106 of the building frame 102 is provided. Since it hits the horizontal member 106 on the upper side and gets in the way, when it is actually moved, the handrail column 104 is temporarily shifted to the side of the leg column 103 of the building frame 102, and the upper stage is left in this shifted state. After moving to the scaffold side, a series of operations such as attaching along the pedestal 103 again is necessary, which is somewhat complicated and troublesome.

  In view of the above points, an object of the present invention is to provide a handrail that is easy to handle and has excellent operability to move the handrail column to the upper stage of the framework scaffold.

  In order to solve the above-mentioned problems, the present invention provides a frame scaffolding in which the desired number of building frames are arranged in the upward and horizontal directions and assembled on the frame scaffolding according to claim 1 A plurality of handrail pillars that can be detachably fixed to the leg pillars of the building frame, and an extendable recumbent bridge erected between the handrail pillars. A locking hook that holds the pillar and locks to the horizontal frame of the building frame is provided, and the locking hook pivotally supports the base end portion so that it can be rotated downward, and the downward direction. An urging means such as a spring for returning the locking hook rotated to the original position is provided.

  Further, the preceding handrail of the frame scaffold according to claim 2 is characterized in that an operating handle that is gripped when the handrail column is moved is provided on both sides of the handrail column.

  Further, in the preceding handrail of the framework scaffold according to claim 3, the recumbent is characterized in that it is connected in a flexible manner and connected between handrail columns.

  According to the preceding handrail of the frame scaffold according to claim 1 according to the present invention, it is the preceding handrail of the frame scaffold installed on the frame scaffold to be assembled by arranging a desired number of building frames in the upward and horizontal directions, It consists of a plurality of handrail columns that can be detachably fixed to the pedestal pillars, and an extendable recumbent bridge constructed between each handrail pillar. The handrail pillars hold the leg pillars of the building frame, and the building frame A locking hook that locks to the horizontal member is provided, and the locking hook pivotally supports the base end portion so that it can be rotated downward, and the locking hook that is rotated downward is the original. Because it has a biasing means such as a spring to return it to the position, the handrail column can be moved to the upper stage of the frame scaffolding while keeping the handrail column along the leg of the building frame, and the movement operation is very simple and easy to handle On top of each other, it is possible to keep the handrail pillars connected to each other at the side, and the handrails are unbroken throughout the entire length. Move operation on the safety is high is formed is simple.

  Further, according to the preceding handrail of the framework scaffold according to claim 2, since the operation handle that is gripped when the handrail column is moved and operated on both sides of the handrail column, the handrail column movement operability is good. Easy to handle and suitable.

  Further, according to the preceding handrail of the frame scaffolding according to claim 3, since the recumbent link is flexibly linked and connected between the handrail pillars, an impact or the like is applied to the recumbent during work or transportation. Even if some distortion occurs in the recumbent beam, there is little risk that the function of adjusting the distance between the handrail columns will be reduced, which is preferable because the operability can be maintained well.

  The preceding handrail of the frame scaffold according to the first aspect of the present invention includes a plurality of handrail columns that can be detachably fixed to the leg columns of the building frame, and an extendable recumbent bridge constructed between the handrail columns. Further, the handrail pillar is provided with a locking hook that holds the leg of the building frame and is locked to the horizontal member of the building frame, and the locking hook is pivotable downward. And a spring for returning the locking hook rotated downward to its original position. Then, when holding the pillars of each building frame with the locking hooks of each handrail pillar and locking them to the horizontal member to fix the handrail pillars, the horizontal rails are horizontal between the pillars of each building frame. The safety of workers is ensured.

  Then, when assembling the frame scaffold to the upper stage, after releasing the handrail pillar, the operator holds the handrail pillar with both hands and holds the handrail pillar while holding the leg pillar with the locking hook. Move along the pedestal to push it up to the upper frame. At this time, the top end of the locking hook comes into contact with the horizontal member of the upper building frame, etc., but the locking hook has a structure that avoids by rotating downward about its base end, There is no need to remove the handrail column from the pedestal and move it sideways, and it can be moved along the pedestal. When the locking hook passes the horizontal member position, the locking hook automatically returns to the original lockable position by the spring, and when the handrail column is lowered as it is, the locking hook becomes the horizontal member. And the handrail pillar is fixed to the upper frame. Further, when the handrail pillar is moved, the distance from the adjacent handrail pillar changes, and accordingly, the recumbent automatically expands and contracts. Therefore, it is possible to move the handrail pillars without removing the recumbent one by one, and it is possible to keep the state that the handrail pillars are always connected with recumbent, and the safety operation is high and the moving operation is also simple.

  In this way, when assembling the frame scaffolding, even if the handrail column is moved along the leg of the building frame and moved to the upper stage of the frame scaffolding, the locking hook automatically attaches the horizontal member, etc. In addition to avoiding it, it automatically recovers after passing the horizontal member position, so there is no need for troublesome operations such as shifting the handrail column from the pedestal once and removing it. Since it automatically expands and contracts according to the distance, there is no need to remove it one by one, and the moving operation is simple, easy to handle, and suitable for high-altitude work. In addition, even if you slide your hand at any time during the movement, the locking hook is always in the state of holding the pedestal of the building frame. It can be expected to be caught by a material or the like, which is also preferable in terms of safety.

  Further, the preceding handrail of the frame scaffold according to claim 2 is provided with an operation handle for gripping at the time of the moving operation on both sides of the handrail pillar. And when assembling the frame scaffold, the operator can move the handrail pillar by firmly holding the operation handle that is easy to lift with both hands, without directly holding the handrail pillar body which is not always easy to lift. It has good operability and is easy to handle.

  Further, the preceding handrail of the framework scaffold according to claim 3 is connected between the handrail pillars by link-connecting the reeds to bend freely. And when carrying this leading handrail or when working on the frame scaffolding, if there is a strong impact on the recumbent side of the leading handrail, distortion may occur in the reed. Even if there is some distortion in the recumbent arm, there is little risk that the expansion / contraction function, that is, the function of adjusting the distance between the handrail pillars will be reduced, and this is preferable because the operability can be maintained well even under severe use conditions.

  Embodiments of the present invention will be described below with reference to the drawings.

  Reference numeral 1 in the figure denotes a frame scaffold installed around a building site or the like. A plurality of building frames 2 are erected in parallel, and braces 4 are provided between the pillars 3 of each building frame 2, and horizontal members 5. The scaffolding plates 6 are erected between each other. Reference numeral 7 denotes a handrail of the frame scaffold according to the present invention that is attached to the frame scaffold 1, and is constructed between a plurality of handrail columns 8 that can be detachably fixed to the leg columns 3 of the building frame 2, and between these handrail columns 8. It consists of a telescopic type reed 9.

  The handrail pillar 8 is a prism-like pillar material, and is provided with a locking hook 10 for locking and supporting and fixing to the horizontal member 5 of the building frame 2 on the side of the middle part thereof. Is provided with a fixing clamp 11 for holding the leg column 3 of the building frame 2 and fixing it so that the handrail column 8 does not wobble. Further, on both sides of the handrail column 8, there are provided frame-shaped operation handles 12 that are grasped by an operator when the handrail column 8 is moved.

  As shown in FIG. 5, the locking hook 10 is bent in the middle, and can hold the pedestal 3 while avoiding the pedestal 3 of the building frame 2 from the tip portion 10 a to the intermediate portion 10 b. It has a simple structure. Further, as shown by a two-dot chain line in FIG. 5A, the locking hook 10 has a pin 14 attached to a mounting bracket 13 fixed to the handrail column 8 so that the base end portion 10c can be rotated downward. And a spring 15 as a biasing means for returning the locking hook 10 rotated downward to the original locking position. Reference numeral 16 denotes a stopper for restricting the rotation of the locking hook 10 so as to prevent the locking hook 10 from rotating upward from the locking position and coming off the hook.

  As shown in FIG. 6, the fixing clamp 11 includes a substantially U-shaped fixing bracket 17 and a wedge 19 provided so as to be freely inserted into and removed from a through hole 18 formed in the fixing bracket 17. After holding the pedestal 3 of the building frame 2 with the fixing bracket 17, a wedge 19 is driven into the through-hole 18 to prevent it from coming off and fix it.

  In addition, two support pieces 20 are fixed to the middle part of the handrail column 8 with a space in the vertical direction, and a link member 21 is pivotally attached to each support piece 20 in a pair of left and right. . The link material 21 is formed of a link material main body 22 and an attachment piece 23 fixed to the tip portion thereof. Reference numerals 24, 24 ′ and 25, 25 ′ are support plates that sandwich and support the standing link material main body 22 from the front and rear surfaces, and support plates 24, 25 are provided on the front side of the handrail column 8. Support plates 24 ′ and 25 ′ are respectively fixed to the back surface side of 8. The end of the operation handle 12 is fixed and fixed to the back side of the handle fixing plate 26 provided at the lower ends of the support plates 24 ′ and 25 ′ and the handrail column 8.

  When the link member 21 is in the standing state, the link member body 22 is fitted between the support plates 24 and 24 'and between the support plates 25 and 25' so that the standing state is maintained. When the tip of the material 21 is rotated and tilted away from the handrail column 8, as shown in FIG. 3, the link material main body lower end 22a abuts the side surface of the handrail column 8 and is in a substantially horizontal state. It is to be retained. Accordingly, the rotation range of each link member 21 is restricted to a range from a vertical standing state to a tilted state of a substantially horizontal position.

  In addition, one end of the reed 9 is pivotally supported on the attachment piece 23 at the end of the link member 21 and the other end of the reed 9 is attached at the end of the adjacent link member 21. In the same manner, it is pivotally supported on the rail 23, and between the handrail pillars 8, a horizontal bar 9 is installed in two upper and lower stages. Further, the intermediate portions of these two upper and lower horizontal rails 9 are linked together by an intermediate link member 27 so that the inclination angles of the horizontal rails 9 installed in two levels are synchronized.

  Further, as shown in FIG. 3, the mounting piece 23 is provided with rotation restricting members 28 and 29 for restricting the turning range of the recumbent rod 9, and the leading end portion of the recumbent rod 9 is the rotation restricting member 28. , 29, the range of rotation of the horizontal bar 9 is always restricted within the range of about 90 ° to 135 ° with respect to the longitudinal direction of the link body 22. By doing in this way, when moving the handrail pillar 8 to the upper stage side of the frame scaffold 1, the link material 21 is rotated and the bending between the reed 9 and the link material 21 is smoothly performed. ing.

  In the present embodiment, the horizontal rod 9 is flexibly linked and connected between the handrail pillars 8. However, the present invention is not limited to this, and two pipes having different diameters are used. Of course, it is possible to make it extendable by being inserted, but in this case, if the horizontal rail 9 is distorted due to a strong impact applied to the horizontal rail 9 during work or transportation, each pipe is immediately May be caught and become difficult to expand and contract, and as a result, the function of adjusting the distance between the handrail pillars 8 may be deteriorated. On the other hand, if it can be expanded and contracted by link connection as in the present embodiment, even if some distortion occurs in the reed 9, the structure of the link mechanism, the expansion function, that is, the distance between the handrail pillars 8 There is little risk that the adjustment function will be lowered, and it is preferable to maintain stable handling for a long time even under severe use conditions. In addition, although two link members 21 are formed on the handrail pillar 8, one link member 21 may be provided, and the link member 21 is attached to only one of the adjacent handrail pillars 8, and one end of the reed 9 is connected to the link member 21. Various modifications are possible such that the other end of the horizontal rail 9 may be directly attached to the other handrail post.

  Therefore, when the frame scaffold 1 is assembled upward, the handrail pillar 8 is first lowered along the leg pillar 3 from the upper end side of the leg pillar 3 of each lowermost building frame 2, and the locking hook 10. While holding the pedestal 3, the locking hook 10 is locked to the horizontal member 5 of the building frame 2 to fix the handrail column 8. Then, the link material 21 having one end pivotally attached to each handrail column 8 and the horizontal bar 9 are linked to form a work safety fence.

  Next, after assembling the upper building frame 2 on the lowermost building frame 2, hold the operation handle 12 of the handrail column 8 and attach the handrail column 8 to the building frame 2 as shown in FIG. 2. Push along the pedestal 3 and push it up. At this time, since the handrail column 8 continues to hold the leg column 3 while the handrail column 8 is moving, the handlebar 8 is originally structured to be easy for the operator to move and handle by the operation handle 12. However, there is little danger that the locking hook 10 is easily locked to the horizontal member 5 of the building frame 2 directly below even if the hand slides with some time. On the other hand, as the handrail pillar 8 is raised, the link member 21 is tilted, and the reed 9 is inclined obliquely, and the length is automatically adjusted. For this reason, the handrail pillar 8 can be moved with the recumbent rod 9 always attached, and the safety is high, and it is not necessary to remove it one by one, and the moving operation is simple. Then, the locking hook 10 eventually hits the horizontal member 5 of the upper building frame 2 (FIG. 7a). In this case, the front end side of the locking hook 10 is rotated downward to avoid automatically. Therefore, the handrail column 8 can be pushed up as it is (FIG. 7b). If the locking hook 10 passes the horizontal member 5 position, the locking hook 10 is immediately returned to the original locking position by the spring 15 (FIG. 7c), and then the locking pillar 10 is moved down as it is. The hook 10 is locked to the horizontal member 5 and the handrail column 8 is supported and fixed (FIG. 7d). For this reason, the operator can move and operate the handrail column 8 while holding only the operation handle 12 with both hands, and it is easy to handle and high in safety.

  Subsequently, when the adjacent handrail pillar 8 is lifted along the leg pillar 3 in the same manner as described above, the link member 21 that has been tilted is pushed upward to be in an upright state, and the reed 9 is again in a horizontal state. In this state, the hook 10 of the handrail column 8 is locked to the horizontal member 5 of the upper building frame 2 to fix the handrail column 8. If the scaffold is to be further assembled, the same operation as described above is repeated. When the assembly is finished, the wedge 18 is driven into the fixing bracket 17 of the fixing clamp 11 of each handrail column 8 and firmly fixed so that the handrail column 8 does not wobble.

  Thus, when the frame scaffold 1 is assembled, the handrail column 8 can be moved to the upper stage side of the frame scaffold 1 with the handrail column 8 along the leg column 3 of the building frame 2. There is no need for troublesome operations such as shifting from the pillar 3 and removing it. Also, the horizontal bar 9 automatically expands and contracts according to the movement of the handrail column 8, so there is no need to remove the horizontal bar 9 every time. Is simple and easy to handle. Further, even if the hand is slid at any time during the movement of the handrail pillar 8, the locking hook 10 is always in the state of holding the leg pillar 3 of the building frame 2. Is easy to be caught on the horizontal member 5 of the building frame 2 immediately below, and is highly safe and suitable. Further, since the operation handle 12 for moving operation is provided around the handrail column 8, the handrail column 8 can be moved while firmly grasping with both hands, and it is easy to handle and easy to handle. High and suitable. In addition, since the horizontal rail 9 that is flexibly linked is connected between the handrail pillars 8, the horizontal rail 9 is slightly distorted due to a strong impact applied to the horizontal rail 9 during work or transportation. However, because of the structure of the link mechanism, there is little risk that the expansion / contraction function, that is, the function of adjusting the distance between the handrail pillars 8 will be reduced, and it is preferable that the ease of handling can be maintained well.

  On the other hand, when disassembling the frame scaffold 1, the handrail pillar 8 is slightly lifted to release the locking hook 10 from the horizontal member 5, and then the front end of the locking hook 10 is pushed down by hand. The handrail column 8 is pulled down along the leg column 3 so as not to hit the horizontal member 5 by rotating. At this time, as the handrail column 8 descends, the link material 21 of the handrail column 8 on the adjacent side is tilted, and the reed 9 is tilted and the length is automatically adjusted. Then, when the locking hook 10 passes the horizontal member 5 position and is released from the locking hook 10, the locking hook 10 is immediately returned to the original lockable position by the spring 15, and the rest is left as it is. When the handrail pillar 8 is lowered to the horizontal member 5 of the lower building frame 2, the hook 10 is locked to the horizontal member 5, and the handrail pillar 8 is supported and fixed.

  Subsequently, when the adjacent handrail pillar 8 is pulled down along the leg pillar 3 in the same manner as described above, the tilted link material 21 is pushed upward to be in an upright state, and the reed 9 is again in a horizontal state. In this state, the locking hook 10 of the handrail pillar 8 is locked to the horizontal member 5 of the lower building frame 2 to fix the handrail pillar 8, and then the building frame 2 remaining on the upper stage is removed. Then, the same operation is repeated, and when each handrail column 8 is pulled down to the lowermost building frame 2, the horizontal rail 9 between each handrail column 8 is removed, and finally each handrail column 8 is moved upward. Pull up and pull out from the upper end side of the pedestal 3.

  As described above, even when the frame scaffold 1 is dismantled, the handrail column 8 can be moved to the leg column 3 of the building frame 2 by rotating the locking hook 10 by hand only while avoiding the horizontal member 5. Since it can be moved to the lower side of the frame scaffold 1 in the state of being placed, troublesome operations such as once shifting the handrail column 8 from the leg column 3 and removing it like the case of assembling the frame scaffold 1 are also possible. It is not necessary, and the moving operation is simple and easy to handle.

  In the above embodiment, when the handrail column 8 is pulled down, the locking hook 10 is rotated using one hand to avoid the locking hook 10 and the horizontal member 5 from hitting each other. In the meantime, the handrail column 8 is supported only by the other hand, and the stability is somewhat lowered. For example, the locking hook 10 is provided with a rotating pedal, a switch, and the like. If the stop hook 10 is rotated, it can be supported with both hands even while the handrail column 8 is pulled down, which is preferable because safety can be further improved.

It is a figure which shows the state which installed the preceding handrail which concerns on this invention in the frame scaffold. It is a principal part enlarged view of FIG. It is an enlarged view of the handrail pillar part of FIG. It is (a) front view, (b) partially cutaway side view, (c) partially cutaway rear view, and (d) plan view of the handrail pillar in a state fixed to the pedestal of the building frame. It is (a) front view, (b) side view, and (c) top view of a locking hook. It is an AA expanded sectional view of FIG. It is explanatory drawing explaining a mode that a latching hook avoids the horizontal member of a building frame. It is a figure which shows the conventional preceding handrail.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Frame scaffold 2 ... Building frame 3 ... Leg pillar 4 ... Bracing 5 ... Horizontal material 6 ... Scaffolding board 7 ... Leading handrail 8 ... Handrail pillar 9 ... Reed 10 ... Locking hook 11 ... Fixed clamp 12 ... Operation handle 15 ... Spring (biasing means) 21 ... Link material

Claims (3)

  A plurality of handrail pillars that can be detachably fixed to the pedestal of the building frame, each of which is a leading handrail of a frame scaffolding that is installed on a frame scaffolding that is assembled by arranging a desired number of building frames in the upward and horizontal directions. The handrail column includes a locking hook for holding a leg of the building frame and locking to the horizontal frame of the building frame, and the locking hook includes: The base end portion is pivotally supported so as to be pivotable downward, and is provided with biasing means such as a spring for returning the locking hook pivoted downward to its original position. Leading handrail of frame scaffolding.   The preceding handrail of the frame scaffold according to claim 1, further comprising an operation handle that is gripped when the handrail column is moved and operated on both sides of the handrail column.   The preceding handrail of the frame scaffold according to claim 1 or 2, wherein the reed is linked to bendable and connected between handrail columns.

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