JP5279108B2 - Handrail for frame scaffolding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handrail for a prefabricated scaffold, which can be safely set on the periphery of an upper-stage scaffold board or can be removed from the same by the operator standing on a lower-stage scaffold board, and facilitates attachment/detachment only of the handrail on a lower-stage scaffold even after addition of an upper-stage scaffold. <P>SOLUTION: The handrail is formed of a horizontal member 2 and a pair of diagonals which are rotatably pivoted on both ends of the horizontal member 2. The horizontal member 2 has attached to each end an almost annular mounting piece 5 which can be fitted onto a connection joint fitted to an upper edge of a stud of an H-shaped building frame, from above. The mounting piece 5 consists of a main locking portion 6 and a sub-locking portion 7 which are each formed like an almost half ring, and a distal end of the main locking portion 6 having a proximal end thereof fixed to the horizontal member 2, and one end of the sub-locking member 7 are pivoted on each other by a shaft body 10 such that the sub-locking member 7 is openable/closable. Further when the sub-locking member 7 is closed, a locking pin 12 is protruded/withdrawn by a spring 14 in a manner piercing a through hole 11 formed in a free end of the sub-locking portion, which leads to easy fixture of the sub-locking portion 7 and cancellation of the fixture, to thereby facilitate attachment/detachment of the handrail. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

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 to a handrail attached to a frame scaffolding composed of an H-shaped building frame.

  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 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 a problem, it is composed of a horizontal member and a pair of diagonal members pivotally supported in the vicinity of both ends of the horizontal member, and H-shaped building frames are provided at both ends of the horizontal member. A bracing pin projecting on the side of the opposite side of the pedestal is attached to the free end of the diagonal member while attaching a mounting piece having a through hole inserted into a connecting joint fitted to the upper end of the pedestal. There is a handrail for frame scaffolding in which a pin hole to be inserted is made (Patent Document 1). According to this handrail, it is possible for the operator to install or remove the handrail in advance around the upper scaffolding plate from the safe lower scaffolding plate, and to work on assembling the frame scaffolding or dismantling work The safety of the person can be ensured.
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 even after adding the upper scaffolding, it is easy to remove the handrailing of the lower scaffolding. It is an object of the present invention to provide a handrail for a frame scaffolding that can be attached to and detached from the frame.

In order to solve the above-described problems, in the frame scaffolding handrail of the present invention, the pedestal of the adjacent H-shaped building frame in the frame scaffolding assembled by arranging a desired number of H-shaped building frames in the upward and horizontal directions. A horizontal member having a ring-shaped mounting piece that can be inserted from above with respect to a connecting joint fitted to the upper end of the horizontal member, and a leg on the opposite side to the free end in the vicinity of both ends of the horizontal member. A handrail made of a pair of diagonal members that are pivotally supported by drilling a pin hole to be inserted into a brace pin projecting on the side of the column, and the mounting piece is a main half-ring shaped lock And a sub-engagement part, and the end part of the main-engagement part which fixed the base end part to the horizontal member and one end part of the sub-engagement part are attached by the shaft body, and the sub-engagement part Can be opened and closed, and when the slave locking part is closed, the locking pin is extended and retracted by a spring to match the through hole drilled in the free end. Thereby fixable and release the horizontal member of the section, Omogakari stopped when pivotally mounted portion of the main engaging portion and従係stop portion of substantially semi-ring-shaped forming the attachment piece closing the従係stop portion The mounting piece is attached to both ends of the horizontal member so as to be asymmetrical, while being formed at a position shifted to one of the outer sides of the substantially ring-shaped circumference formed by the portion and the secondary locking portion, when is engaged with sleep heavy by inserting the attachment pieces of adjacent handrail to the connecting joint, characterized in that both the shaft attachment portion of the attachment piece of the adjacent handrail is not configured to contact the other of the mounting piece It is said.

According to the handrail for a frame scaffold according to the present invention, the connecting joint fitted to the upper end portion of the pedestal of the adjacent H-shaped building frame in the frame scaffold that is assembled by arranging the desired number of H-shaped building frames in the upward and horizontal directions. In contrast, a horizontal member with a substantially ring-shaped mounting piece that can be inserted from above is attached to both ends, and a bracing pin that protrudes on the side of the pedestal opposite to the free end in the vicinity of both ends of the horizontal member. A handrail comprising a pair of diagonal members that are pivotally supported by drilling a pin hole to be inserted, and the mounting piece includes a main locking portion having a substantially semi-ring shape and a secondary locking portion. The end portion of the main locking portion having the base end portion fixed to the horizontal member and the one end portion of the sub locking portion are attached to the shaft body so that the sub locking portion can be opened and closed. When the is closed, the locking pin is made to protrude and retract with a spring so as to match with the through hole drilled in the free end, and the secondary locking portion is fixed and released to the horizontal member. Formed by the Omogakari stop portion and従係stop portion when pivotally mounted portion of the main engaging portion and従係stop portion of substantially semi-ring-shaped closing the従係stop portion forming together with the mounting piece and The mounting piece is attached to both ends of the horizontal member so as to be asymmetrical, and the connecting piece of the adjacent handrail is connected to the joint joint. insert and to when is engaged with sleep heavy, since both of the shaft attachment portion of the attachment piece of the adjacent handrail is not configured to contact the other of the mounting piece, the worker safe lower scaffolding board The handrails can be lifted up and down, and the handrails can be installed or removed around the upper scaffolding board, ensuring the safety of the worker, and only the handrails on the lower scaffolding even after the scaffolding is assembled on the upper stage Can be easily attached and removed, and stairs are newly added to the assembled frame scaffolding. When such also, it is possible to secure a working channel to remove the handrail of the part easier.

  According to the frame scaffolding handrail according to the present invention, the handrail main body is composed of a horizontal member and a pair of diagonal members pivotally supported near both ends of the horizontal member. At both ends of the horizontal member, attachment pieces formed in a substantially ring shape that can be inserted from above are attached to connection joints fitted to the upper ends of the pillars of the H-shaped building frame. The piece is composed of a main locking part having a substantially semi-ring shape and a secondary locking part so that it can be attached and detached from the side of the connecting joint. The distal end portion of the locking portion and one end portion of the secondary locking portion are pivotally attached by a shaft body so that the secondary locking portion can be freely opened and closed. Then, when the slave locking portion is closed, the locking pin is projected and retracted by a spring so as to match the through hole formed in the free end portion, so that the slave locking portion can be fixed to and released from the horizontal member. In addition, a pin hole is formed in the free end portion of the diagonal member so as to be inserted into a brace pin projecting on a side surface of the pedestal of the opposite building frame.

  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 the part in order to ensure the channel | path for stairs, the latching of the pin hole and bracing pin of each diagonal material of a handrail is cancelled | released. Then, the locking pin for locking and fixing the secondary locking portion of the mounting piece is pulled out against the spring to release the locking, and then rotated in the opening direction of the secondary locking portion to open the mounting piece. Then, pull out the handrail to the side and remove it from the frame scaffolding to secure a passage for stairs.

  In this way, the worker can install or remove the handrails around the upper scaffolding plate from the lower lower scaffolding plate safely, ensuring the worker's safety when assembling the frame scaffolding or dismantling work it can. In addition, since only the handrail can be easily attached and detached after the framework scaffolding is assembled, even when newly installing stairs to the framework scaffolding, only the handrail at that part is removed to secure the work path. It is possible to do.

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

  1 to 3 are views for explaining a handrail according to the present invention. As shown in FIG. 1, the handrail 1 includes a steel horizontal member 2 having a predetermined length and a pair of steel diagonal members pivotally supported by pins 3 near both ends of the horizontal member 2. 4 and is provided with substantially ring-shaped mounting pieces 5 opened in the vertical direction at both ends of the horizontal member 2, and the inner diameter of the ring portion is slightly larger than the outer diameter of the connecting joint described later, The joint can be inserted from above.

  As shown in FIG. 2, the mounting piece 5 includes a main locking part 6 having a substantially semi-ring shape and a secondary locking part 7, and the main locking part 6 has a substantially U-shaped cross section fixed to the horizontal member 2. One end of the support member 8 having a shape is sandwiched between the support members 8 so as to pass through the shaft body 9 and are pivotally supported. Further, the distal end portion of the main locking portion 6 and one end portion of the secondary locking portion 7 are pivotally attached to the shaft body 10 so that the secondary locking portion 7 is opened and closed as indicated by a two-dot chain line in FIG. When the secondary locking portion 7 is closed, the locking pin 12 is inserted and fixed so as to match the through hole 11 formed in the free end portion.

  3A is a cross-sectional view taken along the line XX of FIG. 2A, and shows a shaft body 9 that pivotally supports the main locking portion 6 and a locking pin 12 that locks the secondary locking portion 7. FIG. The upper end is fixed to the connecting piece 13 and is integrated. A spring 14 is attached to the lower end portion of the shaft body 9 that pivotally supports the main locking portion 6 and is prevented from coming off by a pin 15, and the spring 14 is protected by a cylindrical body 16 fixed to the support member 8. Yes.

  FIG. 3B shows a state in which the shaft body 9 that pivotally supports the main locking portion 6 is pushed up against the restoring force of the spring 14. When the shaft body 9 is pushed up, the slave locking portion 7 is engaged. The locking pin 12 to be stopped also rises together, and the locking of the secondary locking portion 7 is released. Thereby, the secondary locking part 7 can be opened as shown by a two-dot chain line in FIG. Further, when returning the slave latching portion 7 to the original latched state, if the slave latching portion 7 is closed with the shaft body 9 pushed up and then released from the shaft body 9, the restoring force of the spring 14 is restored. Then, the locking pin 12 descends and is inserted into the through hole 11 of the free locking portion 7 free end portion to be locked.

  In addition, the diagonal member 4 has a pin hole 17 inserted into a brace pin projecting on the side surface of the pedestal of the building frame at the free end thereof, and when the handrail 1 is attached, While holding the lower part with both hands, the handrail 1 is lifted high and the ring-shaped attachment pieces 5 at both ends of the horizontal member 2 are inserted into the connecting joints of the building frame pillars.

  Next, a method for attaching the handrail 1 to the frame scaffold A will be described with reference to FIGS. The H-shaped building frame B constituting the frame scaffold A is provided with a pair of pedestals C in parallel, and is formed in a substantially H shape by joining the vicinity of the center of each pedestal C with a horizontal member D, A connection joint E for connecting the H-shaped building frames B up and down is fitted to the upper end of the pedestal C. Then, a pair of H-shaped building frames B are set up facing each other, and a scaffolding plate F is installed between the horizontal members D of the adjacent H-shaped building frames B to form the frame scaffold A.

  Then, when handrails 1 for securing safety are passed between the respective pillars C of the adjacent H-shaped building frames B, the operator rotates the diagonal member 4 of the handrail 1 in a direction substantially orthogonal to the horizontal member 2. The horizontal member 2 is lifted while holding the lower end of each diagonal member 4 indicated by the two-dot chain line in FIG. 4 in the left and right hands while entering the lower scaffolding plate F (not shown). The ring portions of the attachment pieces 5 provided at both ends of the horizontal member 2 are made to face the upper portion of the connection joint E at the upper end portion of the leg column C. At this time, the attachment piece 5 is in a state in which the main locking portion 6 and the secondary locking portion 7 are closed to form a ring portion. Then, the horizontal member 2 is lowered downward while maintaining the horizontal state, and the attachment pieces 5 at both ends of the horizontal member 2 are inserted into the connecting joint E. At this time, the lock pin G of the connection joint E is unlocked as shown in FIG. 5, and the inserted attachment piece 5 is caught by the lock pin G and stops.

  Subsequently, the diagonal members 4 are rotated in this state, and the pin holes 17 of the free end portions are respectively inserted and fixed to the bracing pins H on the side surfaces of the opposite leg pillars C. And after constructing the scaffolding board F between the horizontal members D of the adjacent H-shaped building frame B in the upper stage, the worker goes up to the top floor. At this time, the handrail 1 can be installed in advance around the scaffolding board F on the top floor, so that the operator does not feel much fear. Then, as shown in FIG. 6, when the locking portion Ga of the lock pin G is returned to the locking position indicated by a two-dot chain line to be in the locked state, the side portion of the lock pin G is formed in the secondary locking portion 7. The handrail 1 can be fixed in the position. In addition, when assembling the scaffolding in the upper stage in succession, after attaching the upper H-shaped building frame B, the locking portion Ga of the lock pin G is operated to be in the locked state, and the same operation as above is repeated. Will go. 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 in advance from around the upper scaffold plate from the lower lower scaffold plate, thereby ensuring the safety of the worker.

  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. And in order to secure the passage for this staircase, when removing the handrail 1 attached to the portion where the staircase is installed, the shaft body 9 that pivotally supports the main locking portion 6 of the attachment piece 5 shown in FIG. Push up against the restoring force of the spring 14. As a result, as shown in FIG. 3 (b), the locking pin 12 that locks the secondary locking portion 7 is also lifted together, and the locking of the secondary locking portion 7 is released and inserted into the connecting joint E. The fixed ring part can be 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 addition, the handrail 1 once removed can also be fixed to the connection joint E again and installed by performing a procedure reverse to the above-described operation procedure.

  In this way, the attachment piece 5 of the handrail 1 can be removed simply by pushing up the shaft body 9 against the restoring force of the spring 14, and even after the frame scaffold A has been assembled, only the handrail 1 on the lower stage scaffold can be easily removed. Even if a new stairway or connecting path is installed on the frame scaffold A, only the handrail 1 can be removed without removing the H-shaped building frame B on the upper side. Can be secured.

It is the top view (a) and front view (b) of the handrail for frame scaffolds which concern on this invention. It is the top view (a) which expanded the attachment piece of FIG. 1, and the front view (b) partially cut away. FIG. 2 is a cross-sectional view taken along line XX in FIG. 1A and a cross-sectional view taken along line XX when the locking pin is raised (b). It is a figure explaining the state which attached the handrail of FIG. 1 to the frame scaffold. It is an enlarged view of the connection part of the attachment piece of a handrail of FIG. 4, and a connection joint. It is a YY arrow line view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Handrail 2 ... Horizontal material 4 ... Diagonal material 5 ... Mounting piece 6 ... Main latching part 7 ... Subordinate latching part 8 ... Support material 9 ... Shaft body 10 ... Shaft body 11 ... Through-hole 12 ... Locking pin 13 ... Connecting piece 14 ... Spring 15 ... Pin 16 ... Cylinder A ... Frame assembly scaffold B ... H-type building frame C ... Pole pillar D ... Horizontal material E ... Connecting joint F ... Scaffolding plate G ... Lock pin H ... Strutting pin

Claims (1)

A ring-shaped attachment that can be inserted from above into a connecting joint that is fitted to the upper end of a pedestal of an adjacent H-shaped building frame in a frame scaffolding that assembles the desired number of H-shaped building frames in the upward and horizontal directions. A horizontal member with a piece attached to both ends, and a pin hole to be inserted into a bracing pin projecting on the side of the opposite pedestal at the free end in the vicinity of both ends of the horizontal member, and freely rotatable A handrail composed of a pair of diagonal members pivotally supported on the main member, the mounting piece comprising a main locking portion having a substantially semi-ring shape and a secondary locking portion, wherein the main end is fixed to the horizontal member. The distal end portion of the locking portion and one end portion of the secondary locking portion are pivotally attached to the shaft body so that the secondary locking portion can be opened and closed, and when the secondary locking portion is closed, the transparent end formed in the free end portion is provided. thus it does not conform to the hole to haunt locking pin by a spring and freely fixing and releasing the従係stopper portion in the horizontal material, substantially half forming the mounting piece The shaft-attached portion of the ring-shaped main locking portion and the sub-locking portion is formed on the outer side of the substantially ring-shaped circumference formed by the main locking portion and the sub-locking portion when the sub-locking portion is closed. while formed in a position shifted to one side, the mounting piece is attached so as to be asymmetrical at both ends of the horizontal member and is engaged with sleep heavy by inserting the attachment pieces of adjacent handrail to the connecting joint In some cases, the frame scaffolding handrail is constructed such that both the pivoted portions of the attachment pieces of adjacent handrails do not come into contact with the other attachment piece.

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