JP4639115B2 - Handrail for frame scaffolding of H-shaped building frame - Google Patents

Description

  The present invention relates to a frame scaffolding handrail attached to a frame scaffolding installed along an outer wall of a building in a construction site such as civil engineering and architecture, and more particularly, an H-shaped building frame attached to a frame scaffolding composed of an H-shaped building frame. It is related with the handrail for frame scaffolding.

  Conventionally, a torii-shaped building frame is well known as a building frame for a frame scaffold. Recently, however, an H-shaped building frame that is substantially H-shaped by joining the vicinity of the center of the pedestal with a horizontal member. It is often used, and when building a frame scaffold using this H-shaped building frame, the scaffolding plate is spanned between the horizontal members at the center height position of each adjacent building frame, and this scaffolding plate is used as a boundary. The brace is attached to each of the vertical positions. Therefore, even when the framework scaffold is being assembled or disassembled, the upper part of the pillars of the H-shaped building frame always protrudes around the scaffolding plate on the top floor of the framework scaffold. If a brace or handrail material is attached to the pedestal at least, the handrail can be installed quickly and easily, and the safety of the work on the uppermost floor part of the frame scaffold with danger can be ensured at an early stage.

  However, even if a handrail is installed on or removed from the top floor part of the frame scaffolding as described above by adopting an H-shaped building frame, these operations are performed without a handrail in the surroundings. Therefore, it was impossible to say that there was no problem in work safety.

Therefore, in order to solve such problems, the present applicants previously consisted of a horizontal member and a pair of diagonal members pivotally supported in the vicinity of both ends of the horizontal member. A mounting piece having a through hole that can be inserted into a connecting joint that is fitted to the upper end portion of the pedestal of the H-shaped building frame is attached to the part. An application has been filed for a handrail for a frame scaffolding of an H-shaped building frame in which a pin hole to be inserted into a brace pin projecting on a side surface is formed (Patent Document 1). According to this handrail, the operator can install or remove the handrail in advance around the upper scaffold board from the safe lower scaffold board, or assemble the framework scaffold of the H-shaped building frame, or It is possible to ensure the safety of the worker during the dismantling work.
JP 2005-42452 A

  However, in the handrail of patent document 1, after inserting the through hole of the attachment piece from the upper direction with respect to a connection joint and attaching a handrail to the connection joint as mentioned above, the building frame was further connected to the upper position and the scaffold was added. In this case, it is impossible to remove only the handrail while leaving the building frame.For example, even if a new step is installed on the side of the frame scaffold after assembly, It could not be removed to secure a space for the passage.

  In view of the above points, the present invention can safely install or remove handrails around the upper scaffolding plate from the lower scaffolding plate, and only attach and detach the lower scaffolding railing even after adding the upper scaffolding. It is an object of the present invention to provide a handrail for a framework scaffolding of an H-shaped building frame that can be performed.

  In order to solve the above problems, in the handrail for the frame scaffolding of the H-shaped building frame of the present invention, the H-shaped frame adjacent to the frame scaffolding that is assembled by arranging a desired number of H-shaped building frames in the upward and horizontal directions. A handrail hung between the pillars of the building frame, comprising a horizontal member and a pair of diagonal members pivotally supported in the vicinity of both ends of the horizontal member, and at both ends of the horizontal member A substantially ring-shaped mounting piece is attached to the connecting joint fitted to the upper end of the pillar of the H-shaped frame so that it can be inserted from above, and the mounting piece is also detachable from the side of the connecting joint. While being able to open and close as much as possible, the free end portion of the diagonal member is characterized by having a pin hole inserted into a brace pin projecting on the side surface of the opposite pedestal.

  According to the handrail for the frame scaffolding of the H-shaped building frame according to the present invention, the desired number of H-shaped building frames are arranged in the upward direction and the horizontal direction, and are spanned between the pillars of the adjacent H-shaped building frames in the frame scaffolding that is assembled. A handrail comprising a horizontal member and a pair of diagonal members pivotally supported in the vicinity of both ends of the horizontal member, and at both ends of the horizontal member, upper ends of leg posts of an H-shaped building frame. While attaching a substantially ring-shaped mounting piece so that it can be inserted from above with respect to the connecting joint fitted on the mounting joint, the mounting piece can be opened and closed so that it can also be attached to and detached from the side. Since the free end portion of the diagonal member has a pin hole to be inserted into the brace pin projecting on the side of the opposite pedestal, the operator lifts the handrail while staying on the safe lower scaffolding plate. Handrails can be installed or removed around the upper scaffolding board. In addition to securing the safety of the person, even after building the scaffolding on the upper stage, only the handrails on the lower scaffolding can be freely attached and detached, and even when stairs etc. are newly installed on the assembled frame scaffolding, It is possible to secure the work path by removing the handrail at that portion.

  According to the handrail for the scaffolding of the H-shaped building frame according to the present invention, the handrail main body is composed of a horizontal member and a pair of diagonal members pivotally supported in the vicinity of both ends of the horizontal member. Yes. At both ends of the horizontal member, attachment pieces formed in a substantially ring shape are attached to the connecting joints fitted to the upper ends of the pillars of the H-shaped building frame so that they can be inserted from above. The attachment piece allows the ring-shaped portion to be freely opened and closed with respect to the connecting joint so as to be attachable / detachable from the side. On the other hand, a pin hole to be inserted into a brace pin projecting on the side surface of the pedestal of the opposite building frame is formed in the free end portion of the diagonal member.

  And when setting up the frame scaffolding consisting of H-shaped building frame upwards, when installing handrails around the top floor part of the frame scaffolding, the worker must be a safer platform one step below While on the plate, first rotate the pair of diagonal members of the handrail in a substantially orthogonal direction with respect to the horizontal member, then lift the free end part of each diagonal member with the left and right hands, respectively. It is positioned above the pedestal of the H-shaped building frame that protrudes to the top floor. Then, the substantially ring-shaped attachment pieces at both ends of the horizontal member are placed on the upper part of the connecting joint fitted to the upper end of the pedestal, and are lowered as they are to be inserted into the connecting joint.

  Here, the connection joint has a lock pin for connecting and fixing the upper building frame. If the lock pin is unlocked and the key-shaped locking portion is rotated downward to avoid the connection, The horizontal material mounting piece inserted into the joint is caught by the upper surface of the horizontal bar portion of the lock pin and stopped. Next, the diagonal member is rotated while the horizontal member is maintained in that state, and the pin hole drilled in the free end portion is inserted into the bracing pin projecting on the side surface of the opposite pedestal and fixed. Then, a scaffolding board is installed between the horizontal members of the adjacent H-shaped building frames in the upper stage, and when the worker goes up on the scaffolding board on the top floor, handrails are already installed around the scaffolding board on the top floor. There is no problem in work safety.

  Also, when disassembling the framework scaffold, the above procedure is reversed, and the operator descends onto the lower scaffolding plate with handrails installed around the top floor portion of the framework scaffold, Remove the scaffolding that was erected on the top. Subsequently, the locking between the pin hole and the brace pin of the free end portion of each diagonal member is released, and after rotating each diagonal member in the orthogonal direction with respect to the horizontal member, the free end portion of each diagonal member is Hold it with your left and right hands and lift it upwards. Pull out the mounting pieces at both ends of the horizontal member from the connecting joint to complete the removal of the handrail.

  For example, when newly installing a staircase or the like on the assembled frame scaffold, first, the upper end of the staircase is fixed with a clamp or the like at a desired position on the side surface of the frame scaffold. And when removing the handrail attached to that part in order to secure the passage for the staircase, the pin holes of the diagonal members of the handrail and the bracing pins are released, and the attachment pieces at both ends of the horizontal member Is opened and removed from the frame scaffolding so that the handrail is pulled out to the side, and a passage for stairs is secured.

  In this way, the operator can install or remove the handrails in advance around the upper scaffolding plate from the lower lower scaffolding plate, and work at the time of assembling the frame scaffolding of the H-shaped building frame or dismantling work Can be secured. In addition, even after the frame scaffolding has been assembled, only the lower-stage scaffolding handrail can be freely attached and detached, so even when newly installing stairs to the framework scaffolding, only that part of the railing is removed. It is possible to secure a work path.

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

  FIG. 1 thru | or FIG. 7 is a figure explaining the state which attached the handrail 1 which concerns on this invention to the frame scaffold A formed by assembling the H-shaped building frame B and the scaffolding board C. FIG. The H-shaped building frame B is provided with a pair of pedestal columns D in parallel, and is formed in a substantially H shape by joining the vicinity of the center of each pedestal column D with a horizontal member E. Is fitted with a connecting joint F for connecting the H-shaped building frames B up and down. Then, a pair of H-shaped building frames B are set up facing each other, and a scaffolding plate C is installed between the horizontal members E of each H-shaped building frame B to form a framed scaffolding A.

  And the handrail 1 for safety ensuring is spanned between each pillar D of the adjacent H-shaped building frame B. As shown in FIG. The handrail 1 is composed of a steel horizontal member 2 having a predetermined length, and a pair of steel diagonal members 3 pivotally supported by pins in the vicinity of both ends of the horizontal member 2. 2 is provided with a substantially ring-shaped mounting piece 4 that is open in the vertical direction, and the inner diameter of the ring portion is slightly larger than the outer diameter of the collar body G at the center of the connecting joint F. It is possible to insert F from above.

  The collar body G of the connecting joint F is bent in a key shape with a horizontal bar Ha which can be moved in and out with a coil spring in order to connect and hold the pedestal D of the upper H-shaped building frame B. A known lock pin H having a locking portion Hb is provided. Then, when the mounting piece 4 of the horizontal member 2 is inserted into the collar body G of the connecting joint F, the locking portion Hb of the lock pin H is rotated downward as shown by the solid line in FIG. In the released state, the mounting piece 4 of the inserted horizontal member 2 is hooked and locked on the upper surface of the horizontal bar Ha.

  Further, the substantially ring-shaped mounting piece 4 includes a main locking portion 4a and a sub-locking portion 4b, both of which have a substantially semi-ring shape, and a main locking portion 4a whose base end is fixed to the horizontal member 2. The fixing bolt 6 is fastened and fixed to the horizontal member 2 at the other end of the sub-locking portion 4b. It has. Then, the ring portion of the mounting piece 4 can be freely opened and closed by the tightening and loosening operation of the fixing bolt 6. For example, as shown by the two-dot chain line in FIG. Even from the standpoint, only the handrail 1 can be removed laterally without removing the H-shaped building frame B.

  In addition, recesses 7a and 7b are formed in the outer edge portions of the main locking portion 4a and the secondary locking portion 4b of the mounting piece 4, respectively. As shown in FIG. 6 and FIG. When the H-shaped building frame B is connected and the lock pin H of the connection joint F is locked, the side portions of the lock pin H are designed to fit in the recesses 7a and 7b.

  The diagonal member 3 is provided with pin holes 8 that can be inserted into bracing pins I projecting from the side surfaces of the pillars D of the H-shaped building frame B at the free end thereof. When each diagonal member 3 is rotated toward the opposite pedestal D in a state where the mounting portion 4 is inserted into the connecting joint F, each pin hole 8 and the brace pin I position coincide with each other, and the pin hole is left as it is. 8 is inserted into the brace pin I and can be hooked.

  A procedure for attaching the handrail 1 configured as described above will be described with reference to FIG. First, the upper H-shaped building frame B is set up above the frame scaffold A (1) and (2). Next, the operator turns the diagonal member 3 of the handrail 1 in a substantially orthogonal direction with respect to the horizontal member 2 while staying on the lower scaffolding plate C ′, and moves the free end of each diagonal member 3 to the left and right hands, respectively. The horizontal member 2 is positioned above the pedestal D of the H-shaped building frame B, and the ring portions of the mounting pieces 4 provided at both ends of the horizontal member 2 are placed above the connecting joint F at the upper end of the pedestal D. (3) At this time, the attachment piece 4 is fastened and fixed by the fixing bolt 6 in a state where the main locking portion 4a and the secondary locking portion 4b are closed to form a ring portion. Next, the horizontal member 2 is lowered downward while maintaining the horizontal state, and the attachment pieces 4 at both ends of the horizontal member 2 are inserted into the connecting joint F (4). At this time, the lock pin H of the connecting joint F is unlocked in advance, and the inserted attachment piece 4 is caught by the lock pin H and stopped.

  Subsequently, each diagonal member 3 is rotated in this state, and the pin hole 8 at the free end is inserted and fixed to the brace pin I on the side surface of the opposite leg pillar D (5), (6). Then, after the scaffolding plate C is installed between the horizontal members E of the adjacent H-shaped building frames B in the upper stage (7), the worker goes up to the top floor. At this time, the handrail 1 can be installed in advance around the scaffolding board C on the top floor, so that the operator does not feel much fear. In addition, when the scaffold is subsequently assembled on the upper stage, the same operation as described above is repeated.

  At this time, as shown in FIGS. 5 to 7, the upper H-shaped building frame B is attached to the connecting joint F while the mounting piece 4 of the horizontal member 2 inserted into the collar body G is left as it is. After fitting the pedestal D of the H-shaped building frame B, the locking portion Hb is returned to the locking position to be locked, and the mounting piece 4 of the horizontal member 2 together with the pedestal D of the upper H-shaped building frame B Also pinch. Further, when dismantling the frame scaffold A, the work may be performed in the reverse order to the above, and the work can be performed safely.

  In this way, the operator can install or remove the handrail 1 from the top of the lower lower scaffold plate around the upper scaffold plate, thereby ensuring the safety of the worker, and the horizontal material of the handrail 1 2 Since the attachment pieces 4 at both ends are inserted into the connecting joint F at the upper end of the pedestal D of the H-shaped building frame B, and the free end portion of the diagonal member 3 of the handrail 1 is attached to the bracing pin I of the H-shaped building frame B. It is safe because it can be firmly fixed without coming out.

  Further, when a temporary staircase or the like is newly installed on the frame scaffold A assembled according to the above procedure, first, the upper end of the staircase is fixed to a desired position on the side surface of the frame scaffold A with a clamp or the like. In order to secure the passage for the staircase, when the handrail 1 attached to the portion where the staircase is installed is removed, the pin holes 8 of the diagonal members 3 of the handrail 1 and the brace pins I are released from being locked. At the same time, the fixing bolts 6 of the mounting pieces 4 at both ends of the horizontal member 2 are loosened to rotate the slave locking portion 4b, and the ring portions that have been inserted and fixed in the connecting joint F are opened. And the handrail 1 is removed from the frame scaffold A so that the handrail 1 is pulled out to the side, and the passage for stairs is ensured.

  In this way, only after the frame scaffolding A has been assembled, only the handrail 1 of the lower scaffolding can be removed freely, so that a stairs or a connecting path is newly installed on the frame scaffolding A. In addition, it is possible to remove only the handrail 1 without securing the H-shaped building frame B on the upper side, and to secure a work path. In addition, the handrail 1 once removed can be fixed to the connection joint F again and installed by performing a procedure reverse to the above-described operation procedure.

It is a front view which shows the state which attached the handrail for frame scaffolds which concerns on this invention to the frame scaffold of an H-shaped building frame. It is a principal part enlarged view of FIG. FIG. 3 is an XX arrow view in which a part of FIG. 2 is omitted. It is the top view which abbreviate | omitted a part of FIG. It is another principal part enlarged view of FIG. It is the YY arrow line view which abbreviate | omitted a part of FIG. It is the top view which abbreviate | omitted a part of FIG. It is explanatory drawing which shows the operation | work procedure which attaches the handrail for frame scaffolds which concerns on this invention to the frame scaffold of an H-shaped building frame.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Handrail 2 ... Horizontal material 3 ... Diagonal material 4 ... Mounting piece 6 ... Fixing bolt 8 ... Pin hole A ... Frame assembly scaffolding B ... H-type building frame C ... Scaffolding plate D ... Leg pillar E ... Horizontal member F ... Connection joint G ... Color body H ... Lock pin I ... Bracing pin

Claims (1)

  A handrail that spans between the pillars of adjacent H-shaped building frames in a frame scaffolding that is assembled by arranging a desired number of H-shaped building frames in the upward and horizontal directions. It consists of a pair of diagonal members that are pivotally supported, respectively, and a ring that can be inserted from above into a connecting joint fitted to the upper end of the pillar of the H-shaped building frame at both ends of the horizontal member. While attaching the mounting piece in the shape, the mounting piece can be opened and closed so as to be detachable from the side with respect to the connecting joint, while the free end portion of the diagonal member is attached to the side of the opposite pedestal. A handrail for a frame scaffolding of an H-shaped building frame, wherein a pin hole to be inserted into a projecting bracing pin is formed.

Images