JP6616633B2 - Temporary handrail - Google Patents

Description

  The present invention relates to a temporary handrail attached to a work scaffold installed at a construction site or the like.

  In general, when a building, a condominium, a general house, or the like is constructed or repaired, a steel work scaffold is assembled so as to surround the building. This work scaffold is composed of a temporary work floor and a temporary structure that supports the work floor. Depending on the structure, there are a single pipe scaffold, a frame scaffold, a wedge-tight scaffold, and the like. These are selected and used optimally according to the state of the site to be installed, the cost, the building, the scale of work, and the like.

  Such work scaffolds not only have excellent workability and are easy to assemble and remove, but also have high safety so that they will not fall over due to a gust of wind or accidentally fall down. It has been demanded. In particular, in order to prevent the worker from falling, not only is the duty to use a safety belt, but also, for example, as shown in the following Patent Documents 1 to 4, etc., in addition to crossing the scaffold frame, a handrail and a middle rail , Skirting boards, mesh sheets, etc. are attached. Moreover, when assembling a high-rise scaffold, a handrail advanced construction method with high safety as shown in Patent Document 5 below is recommended.

  By the way, a certain gap (for example, about 30 to 40 cm) is generated between the work scaffold and the building outer wall in order to ensure workability. For this reason, a large gap is generated between the building and the scaffold without a handrail, and a temporary handrail is required to prevent a worker on the scaffold or the building (rooftop) side from falling into this gap. . Therefore, as shown in Patent Document 6 below, the present inventor has proposed a new simple handrail bracket capable of easily and reliably mounting and removing a simple handrail assembled so as to extend from the scaffold side to the building side. Yes.

JP-A-11-36604 JP 2002-188282 A JP 2002-206336 A JP 2002-220926 A JP 2012-132157 A Registered Utility Model No. 3186625

  By the way, since the simple handrail bracket as shown in Patent Document 6 is configured to hold a protective single pipe by a clamp, the bolt and nut of the clamp are used by using a tool each time it is attached and detached. Since tightening and loosening operations are required, as the number increases, more time and labor are required for the removal and attachment.

  Therefore, the present invention has been devised to solve these problems, and an object of the present invention is to provide a new temporary handrail capable of easily performing installation and removal work.

  In order to solve the above-mentioned problem, the first invention is a temporary handrail having a bracket attached to a scaffold and a handrail bar attached to the bracket, and the bracket extends from the scaffold toward the building side. A single pipe, at least one connection pipe connecting the single pipes, a clamp-side end of each single pipe, and a clamp for attaching the single pipe end to the scaffold; The handrail bar is a temporary handrail characterized in that the handrail bar has attachment holes to be inserted into the lock pins at both ends of the bar-shaped bar body.

  According to such a configuration, the bracket can be easily and reliably attached to the scaffold only by attaching each clamp to the scaffolding pillar or the like. Further, the handrail bar can be easily attached to the bracket simply by inserting attachment holes provided at both ends of the bar body into lock pins provided at the end of the bracket. Further, the handrail bar can be easily removed simply by releasing the lock pin and removing the bar body from the lock pin.

  According to a second aspect, in the first aspect, the bracket includes a pair of first single pipes extending from the scaffold toward the building, and at least one first connection pipe connecting the first single pipes. And a first frame that is provided at the end of the first single pipe on the scaffold side and is attached to the scaffold, and is parallel to each other from the building toward the scaffold side. A pair of second single pipes that are inserted into or inserted into the building side end of the first single pipe, and at least one second connection that connects the second single pipes. A temporary handrail comprising a pipe and a lock pin provided at a building-side end of each of the second single pipes.

  According to this configuration, in addition to the same effects as the first invention, the second frame can be slidably moved with respect to the first frame, so the distance of the handrail bar supported by the bracket from the scaffold side can be increased. It can be adjusted freely.

  In a first or second invention, a third invention is a handrail for attaching a handrail bar to a side surface of the tubular body, wherein the tubular body is rotatably fitted to the building-side end portion of each single pipe. A temporary handrail provided with a clamp. According to such a structure, a handrail bar can be attached using not only a lock pin but also a handrail clamp.

  A fourth invention is a temporary handrail according to the first to third inventions, wherein the lock pin is a spring-type gravity lock or a tip-type gravity lock. In this way, using a spring-type gravity lock or a tip-end type gravity lock, it can be easily installed by simply inserting it into the mounting hole of the bar body, and it will be locked, so the handrail bar will come off without permission. There is no such thing as Also, the handrail bar can be easily removed simply by releasing the lock.

  According to a fifth invention, in the fourth invention, the lock pin is welded so as to be coaxial with a head portion of a bolt screwed into a building side end portion of each single pipe. Is a temporary handrail. According to such a structure, it can manufacture at low cost by using a commercially available lock pin, welding this to a commercially available bolt, and screwing it to the building side edge part of each single pipe.

According to the temporary handrail according to the present invention, the following excellent effects are exhibited.
(1) The handrail bar can be easily attached to the bracket simply by inserting attachment holes provided at both ends of the bar body into lock pins provided at the end of the bracket. Further, the handrail bar can be easily removed simply by releasing the lock pin and removing the bar body from the lock pin.
(2) Since the second frame is slidably movable with respect to the first frame, the distance of the simple handrail supported from the scaffold side can be freely adjusted.
(3) By providing the handrail clamp, the handrail bar can be attached using not only the lock pin but also the handrail clamp.
(4) By using a spring-type gravity lock or a forward-turning-type gravity lock, it can be easily installed by simply inserting it into the mounting hole of the bar body, and since it is locked, the handrail bar is There is no such thing as going off. Also, the handrail bar can be easily removed simply by releasing the lock.
(5) Since a lock pin and a commercially available bolt can be used by welding the lock pin so as to be coaxial with the head of the bolt screwed into the building side end of each single pipe, Can be manufactured at low cost.

It is a side view showing one embodiment of temporary handrail 100 concerning the present invention. It is the elements on larger scale which show the S section in FIG. It is a top view which shows the state which attaches the handrail bar 120 to the bracket 110 attached at equal intervals. (A) is the front view which shows the handrail bar 120, (B) is the top view. (A) thru | or (C) is sectional drawing which shows the structure and effect | action of a spring type lock pin (gravity lock) 31. FIG. 3 is a perspective view showing a state in which a handrail bar 120 is attached to the lock pin 31. FIG. (A) is a side view which shows the state which extended the bracket 110, (B) is a side view which shows the state which shortened the bracket 110. (A) is a top view which shows the structure of a forward folding type lock pin (gravity lock) 31, (B) is sectional drawing which shows the structure and an effect | action. It is a side view which shows other embodiment of the temporary handrail 100 which concerns on this invention. It is a side view which shows other embodiment of the temporary handrail 100 which concerns on this invention. It is a side view which shows other embodiment of the temporary handrail 100 which concerns on this invention. It is a side view which shows other embodiment of the temporary handrail 100 which concerns on this invention.

  Next, an embodiment of the present invention will be described with reference to the accompanying drawings. 1 is a side view showing an embodiment of a temporary handrail 100 according to the present invention, FIG. 2 is a partially enlarged view showing an S portion in FIG. 1, and FIG. 3 is an embodiment of the temporary handrail 100 according to the present invention. It is a top view which shows one form. As shown in the figure, the temporary handrail 100 includes a cross-girder-shaped bracket 110 attached to the work scaffold 200 and a bar-shaped handrail bar 120 attached to the bracket 110.

  The bracket 110 includes a pair of upper and lower first single pipes 10 and 10 extending in parallel (horizontal) from the work scaffold 200 toward the roof of the building 300, and one bracket connecting the first single pipes 10 and 10. An H-shaped first frame F1 composed of the first connecting pipe 20, a pair of second single pipes 11 and 11 inserted into the single pipes 10 and 10, and a space between these second single pipes 11 and 11 It is composed of an H-shaped second frame F2 composed of one second connecting pipe 21 to be connected.

  Scaffolding clamps 30 and 30 are respectively provided at the end portions of the first single pipes 10 and 10 on the scaffold 200 side of the first frame F1, and the first frame F1 is vertically disposed with respect to the column 210 of the working scaffold 200. It is designed to be detachable in the direction. The working scaffold 200 is, for example, a wedge-tight scaffold, and at least a plurality of vertically extending columns (vertical single tubes) 210 and a scaffold-side handrail (horizontal single tube) that horizontally connects these columns. 220, and a scaffold bracket 230 for supporting a scaffold plate (not shown) on the column 210 side.

  On the other hand, lock pins 31 and 31 are provided at the ends of the second single pipes 11 and 11 of the second frame F2 on the side of the building 300, respectively, and hold the bar-shaped handrail bars 120 and 120, respectively. Yes. As shown in FIG. 4, each of the handrail bars 120 and 120 is formed by processing both ends of a bar body 121 made of a metal pipe having a length of about 1800 mm and an outer diameter of about 15 to 30 mm into a flat plate shape. In this structure, circular mounting holes 122 and 122 are formed.

  The lock pin 31 is made of, for example, a spring-type gravity lock, and is inserted into the attachment hole 122 of the handrail bar 120. That is, the lock pin 31 is provided with a claw 31b on the side surface of the cylindrical pin body 31a as shown in FIGS. 5A and 6A, and the claw 31b is connected to the side surface of the pin body 31a by a coil spring 31c. It is configured so as to be able to protrude and retract from a slit 31d formed in the above.

Then, as shown in FIG. 5 (B), when inserting into the mounting hole 122 of the handrail bar 120, the claw 31b is immersed in the pin main body 31a, and after passing through this, the claw 31b is passed through FIG. 5 (C) and FIG. ), The claw 31b protrudes and the handrail bar 120 does not fall off without permission. In this state, the handrail bar 120 can be easily removed by pulling out the handrail bar 120 while pushing the nail 31b into the pin main body 31a with a finger.

  Further, as shown in FIGS. 1 and 2, a metal tubular body 40 is rotatably fitted to the end of the second single pipe 11, 11 on the building 200 side, and the tubular body 40. Are provided with handrail clamps 32, 32, respectively. Further, as shown in FIG. 1, a fixing nut 51 for screwing the distal end of a set screw 50 into the first single tube 10 in the radial direction is provided on one of the first single tubes 10, 10 of the first frame F <b> 1. Is provided.

Then, for example, as shown in FIG. 1, at least two temporary handrails 100 of the present invention having such a configuration are prepared, and the scaffold clamps 30, 30 on the first frame F1 side of each bracket 110 are used for work. After attaching to the support column 210 of the scaffold 200, if attached to the lock pins 31 and 31 on the second frame F2 side so as to hold the handrail bars 120 and 120, respectively, the upper and lower sides extend from the work scaffold 200 side to the building 300 side. The pair of handrail bars 120, 120 can be attached easily, quickly and reliably.

  That is, conventionally, in order to attach the handrails 400, 400 made of a single pipe as shown in the figure to the scaffold 200, it is necessary to prepare a plurality of single pipes and attach them to the bracket using a clamp. If the temporary handrail 100 of the present invention is used, the handrail bar 120, simply and reliably is simply inserted by inserting the handrail bars 120, 120 into the lock pin 31 located on the building 300 side after the bracket 110 is attached to the work scaffold 200 side. 120 can be attached.

Thereby, since the handrail bars 120 and 120 can be attached without using a tool etc., the assembly | attachment operation | work of the temporary handrail 100 with respect to the work scaffold 200 can be performed rapidly. Further, since the handrail bars 120, 120 are pulled out from the lock pins 31 and then only the scaffold clamps 30, 30 are removed, the removal work can be easily and quickly performed.

  Further, as shown in FIG. 7, if the set screw 50 of the first frame F1 of the bracket 110 is loosened, the second frame can be detachably moved with respect to the first frame F1, so that it varies from site to site. Depending on the distance between the scaffold 200 and the building 300, it is possible to adjust the distance appropriately. Then, after the adjustment, if the set screw 50 is tightened, the positional relationship after the adjustment can be maintained, so that it is possible to reliably prevent the distance (length) from shifting.

  Further, since the handrail clamps 32 and 32 that are rotatable are provided together with the lock pins 31 and 31 on the second frame F2 side, a simple single handrail like a conventional pipe may be attached to the handrail clamps 32 and 32. It becomes possible. In particular, when the mounting interval of the bracket 110 is larger or smaller than specified, the handrail bar 120 having a fixed distance between the mounting holes 122 and 122 cannot be mounted. Useful. Further, by attaching the handrail clamps 32 and 32 via the cylindrical body 40, the interval between the single tube handrails, the mounting height, and the like can be freely changed.

  For example, if a single pipe handrail is attached to the handrail clamps 32, 32 in the state shown in FIG. 1, the distance between the single pipe handrails becomes the largest, and conversely, the lower handrail clamp 32 is connected to the second single pipe. If the single handrail is attached in a state where the upper handrail clamp 32 is rotationally moved below the second single pipe 11, the distance between the handrails can be minimized. . Furthermore, if used in combination with the lock pins 31, 31, the mounting height of the handrail bars 120, 120 can be easily adjusted.

If the temporary handrail 100 of the present invention is provided as described above, even if there is a gap of, for example, about 30 to 40 cm between the scaffold 200 and the building 300 as shown in FIG. It is possible to move between 300 safely and easily. In addition, it is possible to prevent an accident in which an operator on the side of the building 300 accidentally falls from between the scaffold 200 and the building 300.

  Further, the lock pin 31 may be a bendable gravity lock as shown in FIG. 8 in addition to the spring-type gravity lock as shown in FIG. That is, this bendable gravity lock is formed by forming a slit 31e at the tip of a pin body 31g and pivotally supporting a lock piece 31f larger than the pin body 31g in the slit 31e. As shown in B), by rotating the lock piece 31f with a finger, the handrail bars 120, 120 can be easily attached and detached, and can be reliably prevented from coming off after installation.

  Next, FIG. 9 thru | or FIG. 11 shows other embodiment of the temporary handrail 100 which concerns on this invention. First, FIG. 9 is attached by rotating the scaffold clamps 30, 30 on the first frame F1 side by 90 ° with respect to the direction of the first embodiment. With such a configuration, the scaffolding clamps 30, 30 can be attached up and down with respect to the handrail (horizontal single tube) 220 on the scaffolding 200 side. The handrail bars 120 and 120 can be supported from positions other than the 210 position.

  Next, FIG. 10 shows attachment of the clamps 30 and 30 for the scaffold on the first frame F1 side so as to be rotatable about the axis of the first single pipes 10 and 10. With such a configuration, the scaffolding clamps 30 and 30 can be attached not only to the support column 210 on the scaffolding 200 side but also to the handrail (horizontal single tube) 220, so that the usability is further improved. That is, in order to attach the scaffolding clamps 30, 30 to the pillars 210 of the scaffold 200 positioned vertically, the entire axis of the scaffolding clamps 30, 30 is rotated to coincide with the axis of the pillars 210. It can be easily attached to the column 210 without changing its posture.

  On the other hand, in order to attach the scaffolding clamps 30 and 30 to the upper and lower scaffolding-side handrails 220 and 220 of the scaffold 200 positioned horizontally, the shafts of the scaffolding clamps 30 and 30 are connected to the scaffolding-side handrails 220 and 220, respectively. It can be easily attached to the scaffolding-side handrails 220 and 220 without changing the overall posture by rotating 90 ° so as to coincide with the axis.

  In addition, as shown in FIG. 11, if the bracket 110 is configured only by the first frame F1, the structure becomes simpler, the weight can be reduced, and the manufacturing cost can be reduced. Further, in the present embodiment, both the first frame F1 and the second frame F2 are configured by a single hollow inner tube, but may be a solid rod shape (bar shape), and the material thereof is As long as it has sufficient strength, it is not limited to metal (steel pipe), and may be vinyl pipe, glass fiber reinforced plastic, wood, or the like.

  In the present embodiment, the temporary handrail 100 according to the present invention is described as being attached to the wedge-tight scaffolding. In addition to scaffolding, it can be easily applied to all scaffolds such as mobile scaffolds. Further, as shown in FIG. 12, if the bracket 110 is composed of only a pair of scaffolding clamps 30 and 30, a U-shaped bracket 110, and a pair of lock pins 31 and 31, the structure becomes simpler. Thus, the weight can be reduced and the manufacturing cost can be reduced.

DESCRIPTION OF SYMBOLS 100 ... Temporary handrail 110 ... Bracket 120 ... Handrail bar 121 ... Bar main body 122 ... Mounting hole 200 ... Work scaffolding 210 ... Supporting column 220 ... Scaffolding handrail 230 ... Scaffolding bracket 300 ... Building 10 ... First single pipe 11 ... Second Single pipe 20 ... 1st connection pipe 21 ... 2nd connection pipe 30 ... Clamp for scaffold 31 ... Lock pin (gravity lock)
32 ... Clamp for handrail 40 ... Cylindrical body 50 ... Set screw 51 ... Fixing nut F1 ... First frame F2 ... Second frame

Claims (1)

A temporary handrail having a bracket attached to the scaffold and a handrail bar attached to the bracket;
The bracket is provided at a scaffold side end of each single pipe, a pair of single pipes extending from the scaffold toward the building side, at least one connection pipe connecting the single pipes, and A clamp for attaching a single pipe end to the scaffold, and a lock pin provided at a building side end of each single pipe,
The handrail bar has attachment holes to be inserted into the lock pins at both ends of a bar-shaped bar body,
The lock pin is made of a spring-type gravity lock or a tip-type gravity lock, and is welded so as to be coaxial with a head of a bolt screwed to a building side end of each single pipe. Temporary handrail characterized by being.

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