JP5628890B2 - Leading handrail frame of framework scaffold - Google Patents

Description

  The present invention relates to a preceding handrail frame that is attached in advance to an existing lower stage scaffold as a handrail for a new upper stage scaffold in the process of constructing a multistage frame scaffold at a construction work site.

  As a frame scaffolding, a pair of pedestal columns are connected to each other by a horizontal member at the upper end, facing the gate-shaped building frame, and a scaffolding plate is bridged between the horizontal members of both building frames. The method of assembling is often used. And when assembling this framework scaffold, when assembling the new upper scaffold on the existing lower scaffold, in order to ensure the safety of the work, prior to the assembly of the upper scaffold, It is widely practiced to attach a leading handrail frame as a handrail for the upper stage scaffolding between the pedestals.

  Such a leading handrail frame is a stationary type that is used as a handrail for the upper stage scaffolding as it is attached to the upper part between the pillars of the lower stage scaffolding, as well as upper and lower stages by link bending and lifting and lowering via guide rollers. There are also relocation molds that can be relocated between building frames, but the relocation molds are structurally complicated and expensive to manufacture, and also have the disadvantage of requiring labor for relocation work.

  In general, a stationary type handrail frame has a substantially rectangular frame-shaped handrail body composed of left and right vertical shafts, upper and lower horizontal rails, and a middle rail, and upper and lower fixing brackets are provided on both left and right sides of the handrail main body, respectively. And a positioning fitting that protrudes outward at a position near the middle lower part. And, the attachment to the frame scaffolding is done on the horizontal frame of the lower building frame where the operator holds the handrail frame upside down on the existing lower platform scaffolding, and the left and right positioning brackets are opposed to each other. By mounting, the entire handrail frame is supported on both building frames, and in this supported state, the handrail body is inverted to the original standing posture, and in this standing posture, the lower fixing bracket is placed on the upper side of the pedestal of the lower building frame. Fix it. As a result, the preceding handrail frame becomes the upper handrail, so the worker who climbed the upper platform scaffolding between the horizontal members of the next lower construction frame and then climbed on the upper platform plate. Can assemble the upper scaffold in a state in which safety hooks are secured to the handrail frame to secure the safety of the body. In the assembly work of the upper stage side scaffold, first, the upper stage side building frame is added and connected to the lower stage side building frame, and the upper fixing bracket of the preceding handrail frame is fixed to the pedestal of this upper stage side building frame. A brace is hung in an X shape between the pedestals of the upper building frame, and the next leading handrail frame is attached in the same manner as described above.

  Various structures and shapes are employed as the upper and lower fixing brackets in such a stationary handrail frame. However, especially for the lower fixing bracket, it is attached as a handrail with the fixing force only on the lower side of the handrail body in cooperation with the positioning bracket until the upper fixing bracket is fixed to the pedestal of the upper building frame. Since it will bear strength, a structure that can be firmly and securely fixed to the pedestal of the lower building frame is required.

  Conventionally, as a lower fixing bracket of this type of prior handrail frame, a U-shaped tip is fitted from the side to a pedestal of a building frame, and the open side of the tip is closed and locked by a wedge-shaped member ( Patent Documents 1 and 2) Similarly, a method in which a U-shaped tip is fitted to a pedestal and a fastening bolt screwed into an open edge thereof is fixed to the pedestal (Patent Document 3). A system (Patent Documents 4 and 5) or the like for hooking the tip hook portion to the pocket portion provided in the case is widely used.

JP-A-8-184177 JP 2005-171649 A JP 2003-97055 A JP 2006-291473 A JP 2010-19071 A

  However, in the conventional locking method using a wedge-shaped member, it is necessary to hit a hammer or the like to disengage the wedge-shaped member at the time of constructing or dismantling the scaffold, and even in the fixing method using a tightening bolt, the tightening bolt is fixed with a spanner or the like. In both cases, there is a problem that the operation is troublesome and the burden on the operator is increased by carrying tools such as a hammer and a spanner. On the other hand, in the method of hooking the tip hook portion, it is necessary to fix the metal fittings constituting the pocket portion to the pedestal of the building frame by welding, and accuracy of the direction and height of the pocket portion is also required. Therefore, there is a problem that the manufacturing cost of the building frame is very high.

  In view of the above-mentioned circumstances, the present invention can firmly fix the lower fixing bracket to the pedestal of the lower building frame as a leading handrail frame of the frame scaffolding, and when fixing and releasing the hammer, a spanner, etc. It is an object of the present invention to provide a tool that can be operated very easily and quickly by only one-touch operation by hand without the need for a tool.

If the means for solving the above problems are shown with reference numerals in the drawings, the invention according to claim 1 is the building frame 5 in which the pair of pedestals 51 and 51 are connected by the horizontal member 52 at the upper end. In a frame scaffolding that is assembled in a multi-stage manner while spanning the scaffolding plate 6 between the horizontal members 52, 52 of the two building frames 5, 5, between the opposite pillars 51, 51 of the two building frames 5, 5 A leading handrail frame T2 to be attached,
A leading handrail frame body (handrail body 1) and a lower fixing bracket 2B provided on the preceding handrail frame body (handrail body 1) and fixed to the upper side of the pedestal 51 of the lower building frame 5A are provided. And
The lower fixing bracket 2B has a base end (base portion 21b) side provided on the preceding handrail frame main body (handrail main body 1), and a tip end (tip portion 21a) side fitted to the leg column 51 to hold the leg column 51. A holding frame 21 to be held, a lock pin 22B that makes it impossible to remove the pedestal 51 held by the holding frame 21, and a shaft portion of the lock pin 22B that is provided on the holding frame 21 A first support piece 26 having a through-hole 26a through which the (horizontal shaft portion 22e) is inserted; and a base end (base portion 21b) side of the holding frame 21 with respect to the first support piece 26 and the lock A second support piece 27 having a cut groove 27a through which the base end portion 22f of the pin 22B can pass only in a predetermined rotational posture;
The lock pin 22 </ b> B has a distal end portion (a deformed distal end portion 22 d) inserted and latched in a latch hole 25 provided in the holding frame 21, and a base end portion 22 f between the support pieces 26 and 27. A locking posture that is arranged in a posture that cannot pass through the cut groove 27a, and a distal end portion (a deformed distal end portion 22d) is spaced from the retaining hole 25 and the leg column 51 of the building frame 5A enters and exits the holding frame 21. while enabling, Ri convertible der in the unlocked position of the shaft portion (horizontal axis portion 22e) is inserted into the through hole 26a and the notches 27a,
The lock pin 22B has a deformed tip 22d at the tip,
The hooking hole 25 has a shape that allows the deformed tip 22d to pass only when the lock pin 22B is in the predetermined rotation posture.
When the lock pin 22B is brought into the lock posture, when the deformed tip 22d of the lock pin 22B is inserted into the retaining hole 25 in the predetermined rotation posture, the deformed tip 22d is caused by the weight of the lock pin 22B. The locking hole 25 cannot be removed and the base end portion 22f of the lock pin 22B is disposed between the first and second support pieces 26 and 27 and passes through the cut groove 27a of the second support piece 27. It becomes a posture that cannot be locked and a locked posture.

According to a second aspect of the present invention, in the preceding handrail frames T1 and T2 of the frame scaffold according to the first aspect , the baseboard attachment for screwing the baseboard 8 to the preceding handrail frame main body (handrail main body 1) is provided. The member 7 is provided.

A third aspect of the present invention is the preceding handrail frame T1 of the frame scaffold according to the first or second aspect , wherein the frame is provided on the preceding handrail frame body (handrail body 1) and is horizontally mounted on the lower-stage building frame 5A. A positioning fitting 4 that is hooked on the material 52;
On both side surfaces of the lower fixing bracket 2A and the positioning bracket 4, latching projections 15a and 15b are provided for restricting the overlapping state of the preceding handrail frames T1 so that the overlapping state of the preceding handrail frames T1 is not disturbed. It is supposed to be made.

  The effects of the present invention will be described below with reference numerals in the drawings. First, in the preceding handrail frame T2 according to the invention of the first aspect, the lower fixing bracket 2B is configured such that the base end portion 22f of the lock pin 22B has the first support piece 26 and the second support piece 27 in the lock posture of the lock pin 22B. And the base end portion 22f is disposed in a posture in which the base end portion 22f cannot pass through the cut groove 27a of the second support piece 27. Even if such is added, the lock pin 22B is not inadvertently unlocked. Thereby, the lower fixing bracket 2B can be firmly and securely fixed to the pedestal 51 of the lower building frame 5A. Further, during the fixing operation, the holding frame 21 of the lower fixing bracket 2B is fitted to the pedestal 51, and the end of the lock pin 22B (the deformed end 22d) is a latch hole 25 provided in the holding frame 21. The base end portion 22f is disposed between the first support piece 26 and the second support piece 27, and the base end portion 22f cannot pass through the cut groove 27a of the second support piece 27. Since it only needs to be arranged, a tool such as a hammer or a spanner is not required, and the operation can be performed very easily and quickly only by a one-touch operation by hand. Further, when unlocking, it is only necessary to separate the distal end portion (deformed distal end portion 22d) of the lock pin 22B from the retaining hole 25 and insert the shaft portion (horizontal shaft portion 22e) through the through hole 26a and the cut groove 27a. Therefore, it can be easily detached from the pedestal 51 with only one touch operation without using a tool.

Further , according to the present invention , the lock pin 22B has a deformed tip portion 22d at the tip portion, and the latch hole 25 has a deformed shape of the lock pin 22B only when the lock pin 22B is in the predetermined rotation posture. It has a shape that allows the tip portion 22d to pass therethrough. As a result, the lock pin 22B having the deformed distal end portion 22d inserted through the latch hole 25 automatically becomes undetachable from the latch hole 25 due to its own weight and the base end portion of the lock pin 22B. Since 22f is disposed between the first and second support pieces 26 and 27 and cannot pass through the cut groove 27a of the second support piece 27, the lock posture is more reliably maintained and carelessly performed. It is never unlocked.

According to the invention which concerns on Claim 2 , since the baseboard attachment member 7 is provided, the baseboard 8 of a lower stage side scaffold can be screwed using this baseboard attachment member 7. FIG. Further, the baseboard mounting member 7 improves the strength and durability of the entire preceding handrail frame.

According to the invention of claim 3 , when the preceding handrail frames T1 are stacked for storage or transportation, the overlapping state of the preceding handrail frames is disturbed on both side surfaces of the lower fixing bracket 2A and the positioning bracket 4. Since the latching convex portions 15a and 15b are provided so as to be difficult to regulate, by using the latching convex portions 15a and 15b, the overlapping state of the preceding handrail frames T1. can do.

It is a schematic perspective view which shows the attachment procedure of the prior | preceding handrail frame of the frame scaffold which concerns on this invention, (a) is the attachment state to a lower stage side building frame, (b) is the fixed state to the upper stage side building frame. It is a front view of the preceding handrail frame of a first embodiment concerning the present invention. It is a perspective view which shows the lower fixing metal fitting of the preceding handrail frame, (a) is in a fixed release state, (b) is in a fixed state. It explains the mounting operation of the lower fixing bracket to the building frame with a stiffener, (a) is a side view showing the mounting position, (b) is a cross-sectional plan view of the locked state of the lock pin, (c) is The front view which shows the state which inclined the lock pin before a lock | rock, (d) is a sectional arrow view of the XX line of (b). It is a perspective view of the upper fixing metal fitting in the preceding handrail frame of a first embodiment, (a) shows a non-use state and (b) shows a use state. The displacement operation | movement of the same upper fixture is shown, (a) is a side view, (b) is a cross-sectional arrow view of the YY line of (a). The state in which the preceding handrail frame, the skirting board, and the scaffolding board are attached between the opposed lower-stage building frames is shown, (a) is a cross-sectional plan view, and (b) is a rear view. It is a perspective view which shows the positioning metal fitting and baseboard attachment member of the preceding handrail frame of 1st embodiment, (a) is the state which the preceding handrail frame has arrange | positioned on the one side of a building frame, (b) is preceding on both sides of a building frame. This is a state in which the handrail frame is arranged. It is a vertical side view which shows the state which screwed the baseboard to the preceding handrail frame. It is a front view of the preceding handrail frame of a second embodiment concerning the present invention. It is a perspective view which shows the lower fixing metal fitting of the preceding handrail frame, (a) is in a fixed release state, (b) is in a fixed state. The lock operation of the lock pin of the lower fixing bracket is shown step by step, (a1) to (a3) are cross-sectional plan views of the entire bracket, (b1) to (b3) are side views of the latch hole portion, (c1) (C3) is a front view of the entire metal fitting. It is a perspective view of the upper fixing metal fitting in the preceding handrail frame of a second embodiment, (a) shows a non-use state and (b) shows a use state. The displacement operation | movement of the same upper fixing metal fitting is shown, (a) is a top view, (b) is a front view, (c) is a sectional view taken along line ZZ in (b). The state which piles up the prior handrail frames of 1st embodiment by staggered arrangement | positioning is shown, (a) is a top view, (b) is a longitudinal cross-sectional view in an upper fixing bracket position, (c) is a longitudinal cross-section in a positioning bracket position FIG. The state in which the preceding handrail frames of the first embodiment are stacked in an alternating vertical arrangement is shown, (a) is a plan view, (b) is a longitudinal sectional view at the position of the upper fixing bracket, and (c) is a longitudinal section at the position of the positioning bracket. FIG.

  Hereinafter, an embodiment of a preceding handrail frame of a frame scaffold according to the present invention will be specifically described with reference to the drawings. 2 to 9 show the preceding handrail frame T1 of the first embodiment, and FIGS. 10 to 14 show the preceding handrail frame T2 of the second embodiment. As shown in FIG. 1, the frame scaffolding has a pair of pedestals 51, 51, a horizontal member 52 connecting these upper ends, and a gate-shaped building frame 5 composed of a reinforcing frame 53, which are opposed to each other at regular intervals. In addition, the scaffolding plate 6 is bridged between the opposing horizontal members 52, 52 of the two building frames 5, 5, and a pair of braces 9, 9 are bridged in an X shape between the two pedestals 51, 51 in order of multi-stages. It can be assembled.

  The leading handrail frame T1 of the first embodiment includes, as shown in FIG. 1, particularly FIG. 2, left and right vertical rods 11 and 11, upper and lower horizontal rods 12 and 13, horizontal horizontal rails 14 a, vertical vertical rails 14 b, respectively. 14b constitutes a handrail main body 1 having a substantially rectangular frame shape, and a lower fixing bracket 2A positioned at the lower end portion and an upper fixing bracket 3A positioned at the upper end portion on each of the left and right sides of the handrail main body 1, A positioning fitting 4 located near the middle lower portion and a baseboard mounting member 7 located just above the positioning fitting 4 are provided. Note that the upper fixing bracket 3A and the positioning bracket 4 are located at the same height on the left and right pairs, but the lower fixing bracket 2A shifts the mounting position on the same lower building frame 5A up and down between the adjacent preceding handrail frames T1 and T1. The height is different on the left and right.

  As shown in FIG. 3, the lower fixing bracket 2 </ b> A includes a bracket body 20, which has a ring-shaped base end portion 20 a fitted on the vertical rod 11 and fixed by welding or riveting, and is horizontally extended outward. The lock pin 22 </ b> A is held by the metal fitting body 20. The metal fitting body 20 has a holding frame 21 whose front end side is substantially C-shaped in a plan view, and has a latching hole 23 that passes through a front portion 21a of the holding frame 21 in the vertical direction. Further, a pin holding portion 24 having a substantially U-shape in plan view that is vertically permeable is formed on the base 21 b side of the holding frame 21, and both ends of the pin holding portion 24 with respect to the retaining hole 23 are located at two locations. The pivot portions 24a and 24b are configured, and the intermediate portion is a guide groove 24c that connects the pivot portions 24a and 24b.

  On the other hand, the lock pin 22A includes a downward hook-shaped distal end portion 22a, an intermediate portion 22b curved in a substantially C shape in plan view, and a proximal pivot portion 22c bent downward from the intermediate portion 22 into an L-shape. The pivot portion 22c is inserted into the pin holding portion 24 of the metal fitting body 20, and is pivotally supported so as to be horizontally swiveled and vertically displaced. The lock pin 22A is such that the pivot portion 22c can move between the pivot portions 24a and 24b of the metal fitting body 20 through the guide groove 24c, and the pivot portion 22a is pivoted to the pivot portion 24a closer to the latch hole 23. In a state where 22c is positioned, the hook-shaped tip 22a is set so as to be inserted into the retaining hole 23 to be in a locked posture as shown in FIG. Further, a compression coil spring 28 is mounted on the pivot portion 22 c so as to be disposed between a cap nut 29 screwed to the lower end and the lower surface of the metal fitting body 20, and the lock pin 22 A is a spring of the coil spring 28. The hook-shaped distal end portion 22a is biased by the force in a direction in which the hook-shaped tip portion 22a is inserted into the retaining hole 23, that is, in a locking direction.

  As shown in FIGS. 5 and 6, the upper fixing bracket 3 </ b> A is integrally formed with a concave fitting portion 31 on the distal end side of the U-shaped frame-shaped main body portion 30 straddling the vertical hook 11 of the handrail main body 1. The U-shaped frame-shaped main body 30 is pivotally attached to the vertical shaft 11 via a pivot 35 made of bolts and nuts on the proximal end side, and has a use posture that projects horizontally to the outside and a concave fitting. It can be rotated and displaced in a vertical non-use posture with the joint portion 31 facing upward. The concave fitting portion 31 is wider than the U-shaped frame-like main body portion 30 and has a shape in which the central portion of the tip is recessed in a semicircular shape. In the usage posture of the upper fixing bracket 3A, FIG. As shown by the phantom lines in FIGS. 6A and 6B, the concave fitting portion 31 is fitted to the convex peripheral surface of the pedestal 51 of the upper building frame 5B.

  Further, a leaf spring 32 is fixed to the outer surface of the side wall 30a on one side of the U-shaped frame-shaped main body portion 30, and the bent tip of the leaf spring 32 enters the inner surface side from the window portion 36 of the side wall 30a. A mountain-shaped protrusion 32a is formed. Then, when the upper fixing bracket 3A is rotated and displaced, the protruding portion 32a of the leaf spring 32 is slidably brought into contact with the side surface of the vertical rod 11 and gets over the side surface, as shown in FIG. 6B. In addition, the upper fixing fitting 3A in the non-use posture is held vertically by the protruding portion 32a protruding on the rear side of the vertical hook 11.

  As shown in FIGS. 7 and 8, the positioning fitting 4 has a ring-shaped base end portion 4 a fitted on the vertical rod 11 and fixed by welding or riveting, so that the positioning fitting 4 extends horizontally to the outside. Yes. And the front-end | tip part 4b of this positioning metal fitting 4 bends in the planar view L-shape inside the construction surface of the handrail main body 1, and it is in the half part of the horizontal member 52 of the lower stage side building frame 5A shown by the virtual line of a figure. The tip is hook-shaped so that it fits properly. As shown in FIG. 8B, the positioning brackets 4 and 4 of the two adjacent handrail frames T1 and T1 are placed at the same position on the horizontal member 52 of one lower building frame 5A. become.

  As shown in FIG. 7 and FIG. 8, the skirting board mounting member 7 is made of a frame material having a substantially L-shaped cross section, and the base piece 7 a on one side of the L-shape is formed on the vertical hook 11 at a position directly above the positioning fitting 4. A plurality of mounting holes 71 are arranged in the vertical direction on the mounting piece 7b which is fixed by welding or riveting and is extended to the outside of the side. As shown in FIG. 9, the lower foot scaffolding skirting board 8 is attached to both ends of the preceding handrail frame T1 through bolts and nuts 72 that are passed through the mounting holes 71 of the skirting board mounting members 7 on both the left and right sides. It is supposed to be fixed.

  The illustrated skirting board 8 is configured such that a gap closing plate 82 made of an aluminum mold material is pivotally attached to the lower edge of a skirting board body 81 made of an aluminum hollow mold material, and the skirting board shown in FIG. A hook pin 83 provided at an upper edge of the main body 81 is engaged with a hooking hole (not shown) on the gap closing plate 82 side and locked. As shown in FIG. 7A, the gap closing plate 82 has its leading edge 82a placed on the side edge 6a of the scaffold plate 6 so as to block the gap between the scaffold plate 6 and the preceding handrail frame T1. It has become. The hook pin 83 is urged in the locking direction by a coil spring 85 interposed in the mounting frame 84. Further, the nuts of the bolts and nuts 72 are arranged inside the skirting board main body 81.

  The preceding handrail frame T1 having the above-described structure is attached to the frame scaffold in the lower stage where the operator holds the handrail frame T1 upside down on the existing lower stage scaffold and the left and right positioning brackets 4 and 4 face each other. By placing it on the horizontal members 52, 52 of the side building frames 5A, 5A, the entire handrail frames T1, T1 are supported by both the building frames 5A, 5A, and the handrail body 1 is inverted in this supported state. First, as shown in FIG. 1A, the lower fixing brackets 2A and 2A are fixed to the upper side of the leg columns 51 and 51, respectively. As a result, the leading handrail frame T1 becomes an upper handrail, so that the upper scaffolding plate 6 is bridged between the horizontal members 52, 52 of the lower building frames 5A, 5A facing next, The worker climbing on the scaffolding plate 6 can perform the assembly work of the upper stage side scaffold in a state where the safety band is secured to the handrail frame T1 and the safety of the body is secured. In the assembly work of the upper stage side scaffolding, as shown in FIG. 1 (b), first, the upper stage side building frames 5B and 5B are connected to the lower stage side building frames 5A and 5A, and the upper stage side building frames 5B and 5B are connected. The upper fixing brackets 3A and 3A of the preceding handrail frame T1 are fixed to the pedestal columns 51 and 51, and then the braces 9 and 9 are stretched in an X shape between the pedestal columns 51 and 51 of the upper-side building frames 5B and 5B. Further, the preceding handrail frame T1 is attached in the same manner as described above, and thereafter the frame scaffold is assembled in the same manner. Although omitted in FIG. 1, a baseboard 8 of a lower stage side scaffold is attached to the preceding handrail frame T1 using a baseboard attachment member 7 as shown in FIGS. 7 and 9.

  Thus, in the preceding handrail frame T1, the lower fixing brackets 2A are supported in a state where they are supported on the horizontal members 52, 52 of the lower building frames 5A, 5A on both sides via the positioning brackets 4, 4 on both sides. Can be firmly and securely fixed to the pedestal 51 of the lower building frame 5A, and the holding frame 21 of the lower fixing bracket 2A is applied to the pedestal 51 as shown in FIGS. Since it only needs to be fitted in the shape of a hook and the hook-shaped tip 22a of the lock pin 22A is inserted into the retaining hole 23 of the holding frame 21, a tool such as a hammer or a spanner is not required, and one-touch by hand. The operation can be performed very easily and quickly only by the operation. On the other hand, even when the preceding handrail frame T1 is removed when the scaffold is disassembled, the lower fixing bracket 2A releases the lock only by pulling out the hook-shaped tip 22a of the lock pin 22A from the retaining hole 23. In addition, it can be easily detached from the pedestal 51 with only one touch operation. In addition, the upper fixing bracket 3A is also used and non-used by one-touch operation by simply rotating and disengaging by hand when fixing and releasing the fixing of the upper building frame 5B to the pedestal 51. Can be converted very easily and quickly. And when this leading handrail frame T1 is used, since it is not necessary to attach each function part for handrail frame fixation to the pedestal 51 side of the building frame 5, this building frame 5 can be manufactured at low cost. There are also advantages.

  Further, since the lower fixing bracket 2A is biased in the insertion direction with respect to the retaining hole 23 by the compression coil spring 28 interposed in the pivot portion 22c of the lock pin 22A, Even if vibration or impact is applied while the frame 5A is fixed to the pedestal 51, the lock pin 22A is not inadvertently unlocked. Further, since the lock pin 22A in the unlocked state is swung to a position away from the opening portion of the holding frame 21, and can be stably held by the spring force at that position, when attaching the lower fixing bracket 2A to the pedestal 51, It is possible to prevent the lock pin 22 </ b> A from interfering with fitting the pedestal 51 to the holding frame 21.

  Moreover, since the lock pin 22A can move the pivot portion 22c between the two pivotal support portions 24a and 24b with respect to the latching hole 23, for example, as shown in FIG. Even if the mounting position of the lower fixing bracket 2A on the pedestal 51 is narrowed by the arch-shaped stiffener 54 or the like and the lock pin 22A cannot be swiveled at the fixed pivot portion, this can be dealt with. That is, as shown in FIG. 4B, in a state where the pivot portion 22c of the lock pin 22A is positioned on the far side pivot portion 24b, the tip portion 22a is swung in advance so as to approach the retaining hole 23, and As shown in FIG. 4C, the lock pin 22A is tilted using the guide groove 24c, and in this state, the pivot portion 22c is moved to the near pivot portion 24a, so that the stiffener 54 and the like are replaced with those shown in FIG. As shown in d), the tip 22a can be inserted into the retaining hole 23.

  Next, the leading handrail frame T2 of the second embodiment will be described. In this second embodiment, the same reference numerals are given to the parts common to the first embodiment described above, and the common parts are the first embodiment. The description of the points described in the form is omitted.

  As shown in FIG. 10, the leading handrail frame T2 of the second embodiment is substantially rectangular by left and right vertical rods 11 and 11, upper and lower horizontal beams 12 and 13, horizontal horizontal rails 14a, and vertical central rails 14b and 14b each made of a steel pipe. Although the frame-shaped handrail main body 1 is comprised, the left and right upper ends are in the shape where it was square. Then, on each of the left and right sides of the handrail main body 1, a lower fixing bracket 2B positioned at the lower end portion, an upper fixing bracket 3B positioned at the upper end portion, a positioning bracket 4 positioned near the middle lower portion, and a positioning bracket 4 A baseboard mounting member 7 located right above is provided. The positioning bracket 4 and the baseboard mounting member 7 are the same as those in the first embodiment.

  As shown in FIG. 11, the lower fixing metal fitting 2B includes a metal fitting main body 20 that is fitted with a ring-shaped base end portion 20a on the vertical rod 11 and fixed by welding or riveting, and is horizontally extended outward. It is comprised with the lock pin 22B hold | maintained at the metal fitting main body 20. FIG. As in the first embodiment, the metal fitting body 20 forms a holding frame 21 having a substantially C-shape in a plan view on the distal end side, and is horizontally pierced through the tip 21a of the holding frame 21. A retaining hole 25 is provided. This retaining hole 25 has a shape in which vertical grooves 25b and 25b communicate with each other above and below the circular hole portion 25a.

  The lock pin 22B includes a flat deformed distal end portion 22d, a linear horizontal shaft portion 22e, and a base end portion 22f bent in an L shape from the rear end of the horizontal shaft portion 22e. It is held on the 21b side so as to be axially movable and circumferentially rotatable. The deformed distal end portion 22d is set so that the lock pin 22B is vertical in a rotational posture in which the base end portion 22f is turned sideways (horizontal direction), and can pass through the retaining hole 25 only in the vertical state. Yes. Further, on the base 21b side of the holding frame 21, a first support piece 26 having a through hole 26a through which the horizontal shaft portion 22e of the lock pin 22B is inserted, and a position closer to the metal base end side than the first support piece 26 is provided. In addition, the second support piece 27 having a cut groove 27a through which the lock pin 22B can pass only in a rotational posture in which the base end portion 22f is turned sideways is formed.

  In the lock pin 22B in the unlocked position, the horizontal shaft portion 22e is inserted into the through hole 26a and the cut groove 27a as shown in FIGS. 12 (a1), 12 (b1), and 12 (c1), and the base end portion 22f is the second support piece 27. It is facing down on the rear side. In order to set the lock pin 22B to the locked posture, first, the base end portion 22f is lifted and turned sideways and advanced as it is, so that the base end portion 22f becomes the first end as shown in FIGS. 12 (a2), (b2), and (c2). The deformed distal end portion 22 d that passes through the cut groove 27 a of the two support pieces 27 and becomes vertical can also enter the retaining hole 25. Therefore, if the advancing tip 22d is further protruded to the outside of the retaining hole 25 as shown in FIGS. 12 (a3), (b3), and (c3), the lock pin 22B is self-weighted. The end 22f is displaced downward so that the end 22d is in a locked posture in which the deformed tip 22d cannot be removed from the retaining hole 25. In this locked posture, the base end portion 22 f that faces downward is disposed between the first support piece 26 and the second support piece 27.

  As shown in FIG. 13, the upper fixing fitting 3 </ b> B has a concave fitting portion 31 integrally formed on the distal end side of the U-shaped frame-shaped main body portion 30, and the U-shaped frame-shaped main body portion 30 with the concave side facing downward. Is fitted over the end 12a of the upper horizontal rail 12 in the handrail main body 1 so as to be able to move forward and backward, and as shown in FIG. The use posture applied to the convex peripheral surface 51 and the non-use posture retracted inward of the handrail main body 1 as shown in FIG. Thus, latching holes 33a and 33b are formed on both front and rear sides of the upper surface 30a of the U-shaped frame-shaped main body 30, and a latching convex part 34a of a U-shaped leaf spring 34 provided on the upper horizontal rail 12 side. In the use posture, the front engagement hole 33a is fitted into the rear engagement hole 33b in the non-use posture.

  In addition, elongated holes 35 along the horizontal direction are formed in both side surfaces 30b and 30b of the U-shaped frame-shaped main body 30, and two guide pins 36 made of bolts and nuts provided on the side of the upper horizontal rail 12 are provided. 36 are inserted through the long holes 35, 35, respectively. Accordingly, the upper fixing bracket 3B is held on the upper horizontal rail 12 so as not to be detached, and the guide pins 36 and 36 each serve as a stopper to define the front / rear limit position of the forward / backward movement of the upper fixing bracket 3B.

  The preceding handrail frame T2 having the above configuration may be attached to the frame scaffold in the same manner as the preceding handrail frame T1 of the first embodiment described above. Thus, even in the preceding handrail frame T2, the lower fixing brackets 2B are supported in a state where the entirety is supported by the horizontal members 52, 52 of the lower building frames 5A, 5A on both sides via the positioning brackets 4, 4 on both sides. Can be firmly and securely fixed to the pedestal 51 of the lower building frame 5A, and in the fixing operation, the holding frame 21 of the lower fixing bracket 2B is fitted to the pedestal 51 so that the lock pin 22B is fitted. Since it is only necessary to insert the deformed distal end portion 22d into the retaining hole 25 of the holding frame 21, a tool such as a hammer or a spanner is not required, and the operation can be performed very easily and quickly only by one-touch operation by hand. Yes. Further, even when the handrail frame T2 is removed when the scaffold is disassembled, the lower fixing bracket 2B allows the lock pin 22B to have the base end portion 22f sideways, and the deformed tip end portion 22d is extracted from the latch hole 23. Therefore, the lock can be easily released from the pedestal 51 by only one touch operation without using a tool. In addition, the upper fixing bracket 3B also does not require the use of a tool when the upper building frame 5B is fixed to or released from the pedestal 51, and can be used and not used by a one-touch operation by simply sliding it back and forth by hand. Can be converted very easily and quickly. Furthermore, similarly to the first embodiment, by using the preceding handrail frame T2, separate functional parts for attaching the handrail are not necessary on the side of the pedestal 51 of the building frame 5.

  Furthermore, in the lower fixing bracket 2B according to the second embodiment, when the base end portion 22f of the lock pin 22B is directed downward due to its own weight, the deformed distal end portion 22d cannot pass through the latch hole 25, and further, the lock pin In the locked posture of 22B, the base end portion 22f is disposed between the first support piece 26 and the second support piece 27 of the metal fitting body 20, and the base end portion 22f faces downward. Since it cannot pass through the cut groove 27a, the lock pin 22B is not inadvertently unlocked even if vibration, impact, or the like is applied while being fixed to the pedestal 51 of the lower building frame 5A.

  The lower fixing brackets 2A and 2B and the upper fixing brackets 3A and 3B used in the preceding handrail frame T1 of the first and second embodiments are a combination of the lower fixing bracket 2A and the upper fixing bracket 3B, or the lower fixing bracket 2B. And the upper fixing bracket 3A. Further, the detailed configuration of each metal fitting including the positioning metal fitting 4 can be variously modified in addition to the embodiment.

  By the way, the preceding handrail frames T1 and T2 are generally stacked up and down during transportation and storage, but it is desirable that they can be stacked without disturbance in order to prevent collapse from the stacked state. For such a purpose, FIG. 15 and FIG. 16 illustrate the form of stacking the preceding handrail frames T1... Partially improved from the configuration of the first embodiment.

  FIG. 15 shows a state in which the preceding handrail frames T1 are stacked in a staggered arrangement. In this case, on both side surfaces of the metal fitting body 20 of the lower fixing metal fitting 2A and on both side surfaces of the positioning metal fitting 4, latching convex portions 15a that are continuous in the vertical direction are provided at the same position slightly separated from the vertical rod 11. As a result, when stacking in a staggered arrangement in which the preceding handrail frames T1,... Are alternately shifted obliquely as shown in FIG. 11 (a), the preceding handrail frames T1, T1 are arranged on the upper and lower handrail frames T1, T1 as shown in FIGS. The intermediate handrail frame T1 sandwiched between the hooks 11a and 15a of the upper and lower handrail frames T1 and T1 can be engaged with the inner edges of the vertical hook 11 in this state. Since the hook 11 becomes immovable in the direction approaching the vertical hooks 11 and 11 of the upper and lower preceding handrail frames T1 and T1, it is possible to form a stacked state that is not easily disturbed. The lower fixing brackets 2A and the upper fixing brackets 3A and the other are displaced in a staggered manner, so there is no concern of mutual interference. Further, particularly in this exemplary embodiment, as apparent from FIG. 15C, the vertical hook 11 of the sandwiched leading handrail frame T1 is prevented from being shifted outward due to the bending of the distal end side of the positioning fitting 4.

  FIG. 16 shows a state in which the preceding handrail frames T1,. In this case, on both side surfaces of the bracket main body 20 of the lower fixing bracket 2A and on both side surfaces of the positioning bracket 4, in addition to the hooking projections 15a provided in the staggered arrangement, it is further positioned closer to the base end and similarly up and down. The latching convex part 15b continued in the direction is provided. As a result, when the preceding handrail frames T1... Are stacked one above the other as shown in FIG. 1 (a), the intermediate between the preceding handrail frames T1 and T1 on both the upper and lower sides as shown in FIG. The leading handrail frame T1 has a shape in which the latching convex portions 15b and 15b of the upper and lower preceding handrail frames T1 and T1 are engaged with both outer edges of the vertical rod 11, so that the vertical rod 11 has an upper and lower leading edge. Since the vertical positions of the handrail frames T1 and T1 with respect to the vertical rods 11 and 11 are less likely to be shifted, it is possible to achieve a stacked state that is less likely to be disturbed. Even in this case, the lower fixing brackets 2A and the upper fixing brackets 3A and the other are displaced from each other due to the reversal of the handrail body 1, so that there is no concern of mutual interference.

  The preceding handrail frame of the frame scaffold according to the present invention includes a bent shape and a holding structure of the lock pin in the lower fixing bracket, the shape of the deformed tip when the lock pin has a deformed tip, and the hole shape of the retaining hole, Various design changes can be made in addition to the embodiment regarding the detailed configuration such as the assembly structure for the rotational displacement and forward / backward displacement of the upper fixing bracket, the form and arrangement of the middle rail of the handrail body 1.

1 Handrail body (Leading handrail frame body)
DESCRIPTION OF SYMBOLS 11 Vertical anchor 12 Upper horizontal anchor 12a End part 13 Lower horizontal anchor 14a Horizontal middle crosspiece 14b Vertical middle crosspiece 15a, 15b Latching convex part 2A, 2B Lower fixing bracket 21 Holding frame 21a Tip (tip)
21b Base (base end)
22A, 22B Lock pin 22a Ridge tip 22d Deformed tip (tip)
22e Horizontal shaft (shaft)
22f Base end portion 23, 25 Locking hole 24a, 24b Pivoting portion 26 First support piece 26a Through hole 27 Second support piece 27a Cut groove 28 Compression coil spring 3A, 3B Upper fixing bracket 30 U-shaped frame main body (upper part Fixing bracket body)
30a Side wall 31 Concave fitting part 32 Leaf spring 32a Protruding part 33a Front side hooking hole (front hooking hole)
33b Rear hook hole (rear hook hole)
34 leaf spring 34a latching convex part 4 positioning bracket 5 building frame 5A lower stage side building frame 5B upper stage side building frame 51 pedestal 52 horizontal member 6 scaffolding board 7 skirting board mounting member 8 skirting board T1, T2 preceding handrail frame

Claims (3)

In a frame scaffolding where a pair of pedestals are connected to each other by a horizontal member at the upper end, and a multi-stage assembly is carried out with a scaffolding plate placed between the horizontal members of both building frames, both building frames are opposed to each other. A leading handrail frame attached between the pedestals,
A leading handrail frame main body, and a lower fixing bracket provided on the leading handrail frame main body and fixed to the upper side of the pedestal of the lower building frame;
The lower fixing bracket has a proximal end provided in the preceding handrail frame main body, a distal end side fitted to the pedestal and holding the pedestal, and the holding frame held by the holding frame. A lock pin that prevents the pedestal from being detached, a first support piece that is provided in the holding frame and has a through-hole through which a shaft portion of the lock pin is inserted, and the holding frame than the first support piece And a second support piece having a cut groove that allows the base end portion of the lock pin to pass only in a predetermined rotational posture,
The lock pin has a lock posture in which a distal end portion is inserted into and latched in a latch hole provided in the holding frame, and a proximal end portion is disposed in a posture in which the cut groove is not allowed to pass between the support pieces. And a non-locking posture in which the tip portion is separated from the retaining hole to allow the pedestal of the building frame to enter and exit from the holding frame, and the shaft portion is inserted into the through hole and the cut groove. convertible der to is,
The lock pin has a deformed tip at the tip,
The retaining hole has a shape that allows the locking pin to pass through the deformed tip only in the predetermined rotation posture.
When the lock pin is set to the lock posture, when the deformed tip end portion of the lock pin is inserted into the retaining hole in the predetermined rotation posture, the deformed tip portion is pulled out of the retaining hole by the weight of the lock pin. The leading handrail of the frame scaffold that is locked and has a posture in which the base end portion of the lock pin is disposed between the first and second support pieces and cannot pass through the cut groove of the second support piece. frame.   The preceding handrail frame of the frame scaffolding according to claim 1, wherein the preceding handrail frame body is provided with a baseboard mounting member for screwing the baseboard. A positioning bracket provided on the preceding handrail frame main body and hooked on a horizontal member of the lower-stage building frame;
The both sides of the lower fixing metal fitting and the positioning metal fitting are provided with latching protrusions for restricting the overlapping state of the preceding handrail frames so as not to be disturbed when the preceding handrail frames are stacked. The preceding handrail frame of the frame scaffold described in 2.

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