JPH02285146A - Protective handrail column for prefabricated scaffolding - Google Patents

Abstract

PURPOSE:To mount and demount a protective handrail column with and from a scaffold pipe through vertical movement of a lever by a method wherein L-type plates are mounted to the upper and lower parts of the protective handrail column of prefabricated scaffolding, and a hook lever being a torsion spring device is mounted to the outside and coupled to a lever through a wire. CONSTITUTION:An L-type plate 2 for the lateral pipe of a scaffold is mounted to the upper part of the lower part of a protective handrail column 1 and an L-type plate 3 for a longitudinal pipe to the lower part thereof. A hook lever 4 is mounted to the outside thereof to form a torsion spring 7 device, and a wire 8 is stretched from the root part of the hook lever 4 around the back of the handrail column 1 and coupled to a lever 9. The protective handrail 1 is mounted to and demounted from a pipe by means of a claw 6 at the tip part of the hook lever 4 through vertical movement of the lever 9. This constitution enables simple mounting and demounting of the protective handrail column 1 to and from prefabricated scaffolding and ensures safety by using the column in combination with a protective net, and enables improvement of workability during assembly disassembly and lateral movement of prefabricated scaffolding.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] Industrial Field of Use The present invention relates to a protective handrail post for a frame scaffold used at construction sites and the like.

Currently, many of the protective handrail columns used at construction sites use clamps at their attachment points, but this is extremely inconvenient when reassembling and dismantling framework scaffolding, and it is difficult to prepare them at the site. There are cases where they are not used even if they are installed, which poses a major safety problem. The reason for this is that, as a custom in the construction industry, the assembly and dismantling of scaffolding is a contract work.
First, because workers are time-constrained, they tend to be reluctant to use protective handrail posts with clamps, which are time-consuming to install.

The reason why it takes so much time is that the clamp requires five actions: ■ Opening the lid, ■ Pressing it against the scaffolding muddy pipe, ■ Closing the lid, ■ Holding down the bolt, and ■ Tightening the nut. Perform 3 to 6 movements to close, total 1
A zero operation position is required, and since stability is poor with only one clamp, more than 20 operations are required if two clamps are attached. This places a burden on employees in terms of time and work, so they are forced to proceed with work without protective handrails, resulting in falls from the scaffolding and injuries.

It is also a contributing factor to fatal accidents.

Furthermore, the current guardrail pillars are fixed to the scaffolding, a main net is attached to it, and the safety belt hook at the waist is hooked to the main net during work. It feels like my physical freedom is being restricted, and my work efficiency is getting very bad.

[Problem that the invention seeks to solve]

The present invention eliminates the use of this clamp and -operates the book lever-
To provide a protective handrail column that can be easily attached to and detached from a pipe of a framework scaffold.

[Structure of the invention]

The protective handrail column of the present invention has two upper and lower pipe attachment fittings at the bottom of the column, the upper fitting is for the horizontal pipe of the scaffold, the lower fitting is for the mud pipe, and each of the fittings has two pairs of L-shaped fittings. A key-shaped lever is attached to the outside of the L-shaped plate with bolts and nuts, which is used as a torsion spring mechanism, and a wire is passed from the base of the key-shaped lever to the back of the handrail pillar, and connected to the lever on the back. By raising and lowering the lever, the protective handrail post can be attached and removed from the horizontal pipe of the scaffolding and the muddy pipe using the claw at the tip of the key-shaped lever, and eye bolts for attaching the protective net are provided above the handrail post and on both left and right sides of the top of the pipe mounting bracket. It has a similar structure.

To illustrate, Figure 1 is a perspective view of a protective handrail column, where ■ is a handrail column, ■ is a side pipe type plate, ■ is a mud pipe type plate, ■ is a key type lever, and ■ is a bolt nut. ,
■ is a semicircular claw, ■ is a torsion spring, ■ is a wire, ■ is a lever, 0 is a lever presser fitting, 0 is a wire presser fitting, O
is an eye bolt.

FIG. 2 is a plan view of a mounting fitting for a pipe on muddy ground, where O is a key-shaped lever support fitting, O is a pipe on muddy ground, and O is an L-shaped fitting for fixing the pipe on muddy ground.

FIG. 3 is a plan view of the mounting fitting for the horizontal pipe, where O is the horizontal pipe and O is the semicircular claw support fitting.

FIG. 4 is a perspective view of a semicircular pawl, FIG. 5 is a perspective view of a hook-shaped lever, FIG. 6 is a perspective view of a torsion spring, and FIG. 7 is a perspective view of an L-shaped plate.

[Embodiments of the invention]

Figure 8 is a perspective view of how to attach the protective handrail column to the framework scaffolding.If you raise or lower the lever ■ on the back of the column, the wire 〇 connected to it will act on the base of the key-shaped lever ■. , which uses the force of a spring to open and close the claws of a key-shaped lever.

Figure 9 is a front view of the installation of the protective handrail pillar on the framework scaffold;
O stands for brace, O stands for cloth board, and 0 stands for protective net.

If a protective net is placed between the protective handrail pillars when assembling and dismantling the framework scaffolding, workers can move laterally with peace of mind.

〔Effect of the invention〕

The present invention allows the protective handrail pillar to be easily attached to and removed from the framework scaffold, making it extremely convenient for replacing the scaffolding.Moreover, if a protective net is also used, workers can work with peace of mind.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the protective handrail column, Fig. 2 is a plan view of the mounting bracket for muddy pipes, Fig. 3 is a plan view of the mounting bracket for horizontal pipes, Fig. 4 is a perspective view of the semicircular claw, Figure 5 is a perspective view of the hook-shaped lever, Figure 6 is a perspective view of the torsion spring, Figure 7 is a perspective view of the L-shaped plate, Figure 8 is a perspective view of the installation of the protective handrail column to the scaffold, and Figure 9 is the framework. It is a front view of the installation of a protective handrail pillar and a protective net on a scaffold. Figure 1 Utility model registration applicant Hideyo Okamoto Figure 2 Figure 4 Figure 3 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] Removable protective handrail pillar and auxiliary bracket equipped with spring-loaded claws