KR102631729B1 - Scaffolding fixing device using Z-shaped steel recombination member - Google Patents

Abstract

The present invention relates to a scaffold fixing device using a Z-shaped steel coupling member, and more specifically, to a scaffold fixing device using a Z-shaped steel coupling member to provide improved stability and secure attachment between the scaffold and the horizontal support member. .
According to the present invention, it is possible to provide enhanced rigidity and a solid connection between the scaffold 110 and the horizontal support member 120 through the Z-shaped steel coupling member 130, thereby reducing the risk of accidents during construction. I do it.

Description

Scaffolding fixing device using Z-shaped steel recombination member}

The present invention relates to a scaffold fixing device using a Z-shaped steel coupling member, and more specifically, to a scaffold fixing device using a Z-shaped steel coupling member to provide improved stability and secure attachment between the scaffold and the horizontal support member. .

When working on a module at high altitudes, safety scaffolding is installed, and the weight of the scaffolding is approximately 20kg, which poses difficulties during installation and construction.

In addition, due to field conditions, interference occurred during installation in a small space, and the durability of the scaffold decreased when stored for a long time.

In addition, when fixing the scaffold ratchet bar, the risk of deformation and damage to existing installations increases, and when the amount of scaffold installation increases, the management entity for each company is unclear, causing problems with maintenance.

Therefore, there is a need to lighten the weight of the scaffold, and the effect of increasing working conditions must be provided by installing an external shop. There is no change in the durability of the scaffold when stored for a long time, and there is no risk of changing or damaging existing installations by installing on a reinforced support. There is a need for modular safety scaffolding technology that can provide accuracy and reduce the number of people required for additional demolition work.

In addition, existing work scaffolds were generally used to provide a stable and high platform so that workers could perform work at various heights.

However, existing work scaffolds often had poor stability, limited adaptability, and were not easy to assemble and disassemble.

Specifically, various separation prevention mechanisms are introduced and assembly and disassembly work is performed through them. In order to connect multiple scaffolds, adjacent scaffolds in the longitudinal direction must be connected so that they overlap each other, and then tied together using wires. There is a problem that installation and disassembly are inconvenient.

In addition, because the degree of binding of the wires connecting the scaffolds is not uniform, there is a risk of safety accidents occurring due to the worker's carelessness.

Also, since the work platforms are connected by welding, etc., there is a problem in that installation and disassembly are not easy.

Therefore, in the construction industry, scaffolds are commonly used to provide temporary support structures for workers and materials, and these structures require stable and secure anchoring methods to ensure the safety of workers and the stability of the scaffold.

Existing scaffold anchoring structures do not provide sufficient separation prevention, which can pose potential hazards during construction.

For example, scaffolding systems are widely used in construction, maintenance and other industries to provide temporary work platforms and provide access to elevated work areas.

In particular, scaffolding typically consists of vertical and horizontal structural elements that are organized together in a scaffolding system to form a stable framework.

One of the key aspects of a scaffolding system is the secure connection between the scaffold components and the horizontal support members that hold the scaffold in place.

At this time, existing footrest fixing devices may not provide sufficient stability or may be cumbersome to install or adjust, so an improved foothold fixing device that provides improved performance and ease of use is needed.

Republic of Korea Patent Publication No. 10-1336729 (2013.12.04) Republic of Korea Patent Publication No. 10-1078491 (October 31, 2011)

Therefore, the present invention was proposed in consideration of the problems of the prior art as described above, and the purpose of the present invention is to provide a footrest fixing device using a Z-shaped steel joining member to provide improved stability and secure attachment between the footrest and the horizontal support member. We would like to provide

In order to achieve the problem to be solved by the present invention, a footrest fixing device using a Z-shaped steel coupling member according to an embodiment of the present invention,

Z-shaped steel coupling member 130 connecting the footrest 110 and the horizontal support member 120;

A second fixing member 140 disposed at the top of the Z-shaped steel coupling member 130 and fixed to the lower end 115 of the footrest 110 by a fastening means; and,

A first fixing member 145 disposed at the lower end of the Z-shaped steel coupling member 130 and fixed to the lower end 125 of the horizontal support member 120 by a fastening means, the object of the present invention. will be solved.

According to the present invention, which has the above structure and operation, a footrest fixing device using a Z-shaped steel coupling member is provided to provide improved stability and secure attachment between the foothold and the horizontal support member.

In other words, it is possible to provide enhanced rigidity and a solid connection between the scaffold 110 and the horizontal support member 120 through the Z-shaped steel coupling member 130, thereby providing the effect of reducing the risk of accidents during construction.

Figure 1 is an application example of a footrest fixing device using a Z-shaped steel joining member according to an embodiment of the present invention.
Figure 2 is an example of a footrest fixing device using a Z-shaped steel joining member according to an embodiment of the present invention.
Figure 3 is a plan view showing a state in which the footrest of the footrest fixing device using a Z-shaped steel coupling member according to an embodiment of the present invention is connected to the horizontal support member 120.

A footrest fixing device using a Z-shaped steel joining member according to an embodiment of the present invention,

Z-shaped steel coupling member 130 connecting the footrest 110 and the horizontal support member 120;

A second fixing member 140 disposed at the top of the Z-shaped steel coupling member 130 and fixed to the lower end 115 of the footrest 110 by a fastening means; and,

A first fixing member 145 is disposed at the lower end of the Z-shaped steel coupling member 130 and fixed to the lower end 125 of the horizontal support member 120 by a fastening means,

The Z-shaped steel coupling member 130 is characterized in that it can provide enhanced rigidity and a solid connection between the footrest 110 and the horizontal support member 120.

At this time, the fastening means of the first fixing member 145 and the second fixing member 140 includes bolts and nuts, allowing rapid assembly and disassembly of the footrest fixing device.

At this time, the Z-shaped steel coupling member 130, the first fixing member 145, and the second fixing member 140,

They are made of steel, aluminum and other metals or metal alloys and are coated with corrosion-resistant materials to provide additional protection against environmental factors and extend the life of the scaffold fixture.

Hereinafter, a footrest fixing device using a Z-shaped steel coupling member according to the present invention will be described in detail through an example.

Additionally, the drawings are provided for illustrative purposes only and should not be construed as limiting the scope of the present invention.

Figure 1 is an application example of a footrest fixing device using a Z-shaped steel joining member according to an embodiment of the present invention.

Figure 2 is an example of a footrest fixing device using a Z-shaped steel joining member according to an embodiment of the present invention.

Figure 3 is a plan view showing a state in which the footrest of the footrest fixing device using a Z-shaped steel coupling member according to an embodiment of the present invention is connected to the horizontal support member 120.

As shown in Figure 1, the footrest fixing device using the Z-shaped steel joining member of the present invention,

Z-shaped steel coupling member 130 connecting the footrest 110 and the horizontal support member 120;

A second fixing member 140 disposed at the top of the Z-shaped steel coupling member 130 and fixed to the lower end 115 of the footrest 110 by a fastening means; and,

A first fixing member 145 is disposed at the lower end of the Z-shaped steel coupling member 130 and fixed to the lower end 125 of the horizontal support member 120 by a fastening means.

Therefore, by the above-described configuration, the Z-shaped steel coupling member 130 is characterized in that it can provide enhanced rigidity and a solid connection between the footrest 110 and the horizontal support member 120.

Specifically, the present invention relates to a footrest fixing device, collectively referred to as 100, which includes a Z-shaped steel coupling member 130 for coupling the footrest 110 and the horizontal support member 120.

The footrest 110 and the horizontal support member 120 are stably connected to ensure appropriate positioning and stability of the footrest during use.

At this time, in one embodiment, the Z-shaped steel coupling member 130 includes a second fixing member 140 fixed to the lower end 115 of the footrest 110 and a bolt nut at the upper end.

At the lower part of the Z-shaped steel coupling member 130, there is a first fixing member 145 that is coupled and fixed to the lower end 125 of the horizontal support member 120 with bolts and nuts.

The Z-shaped steel coupling member 130 serves to ensure that the footrest 110 is firmly and stably coupled to the horizontal support member 120.

In the following, the scaffolding device of the present invention will be described in more detail.

The footrest fixing device 100 of the present invention includes a Z-shaped steel coupling member 130 for coupling the footrest 110 and the horizontal support member 120.

At this time, the Z-shaped steel coupling member 130 includes a second fixing member 140 fixed to the lower end 115 of the footrest 110 and a bolt nut at the upper end.

The second fixing member 140 may be fixed to the lower end 115 of the footrest 110 using various fastening means such as bolts, rivets, or other suitable fasteners.

In addition, at the lower part of the Z-shaped steel coupling member 130, there is a first fixing member 145 that is coupled and fixed to the lower end 125 of the horizontal support member 120 with a bolt nut.

The first fixing member 145 may be fixed to the lower end 125 of the horizontal support member 120 using various fastening means such as bolts, rivets, or other suitable fasteners.

The first fixing member 145 may include a hole or groove for accommodating bolts and nuts that enable a firm connection between the horizontal support member 120 and the Z-shaped steel coupling member 130.

At this time, the Z-shaped steel coupling member 130 serves to ensure that the footrest 110 is firmly coupled to the horizontal support member 120 and is fixed and stable when used.

That is, the Z-shaped steel coupling member 130 provides improved rigidity and resistance to bending, torsion, and other forces that may be encountered while using the footrest 110.

In addition, the Z-shaped steel coupling member 130 can minimize the risk of structural damage or collapse of the scaffold 110 and the horizontal support member 120.

In addition, the footrest fixing device 100 using the Z-shaped steel coupling member of the present invention may be manufactured from a variety of materials, including but not limited to steel, aluminum, or other suitable metal or metal alloy.

In particular, the Z-shaped steel coupling member 130 and the first fixing member 145 and the second fixing member 140,

They are made of steel, aluminum and other metals or metal alloys and are coated with corrosion-resistant materials to provide additional protection against environmental factors and extend the life of the scaffold fixture.

In addition, when in use, the footrest fixing device 100 can be easily installed or removed by combining or separating the first and second fixing members 145 and 140 from the horizontal support member 120 and the lower ends 125 and 115 of the footrest 110, respectively. there is.

The bolt and nut fastening means facilitate rapid assembly and disassembly of the scaffolding fixture 100, enabling efficient installation, adjustment, and disassembly of the scaffolding system.

Below is an experimental example of the elastic effect of the Z-shaped steel coupling member 130 of the present invention.

The Z-shaped steel coupling member 130 exhibits a certain degree of elasticity due to its geometric structure and material characteristics, thereby increasing resistance to vibration and improving the overall durability of the footrest fixing device 100.

To describe this effect, we can use the equations for the natural frequency and damping ratio of a cantilever beam:

The natural frequency (f_n) of a cantilever beam can be calculated using the following formula:

f_n = (1/2π) * √(k/m)

k is the stiffness of the beam (N/m), m is the mass of the beam (kg)

At this time, the stiffness (k) of the Z-shaped steel coupling member 130 can be approximated using the formula for the stiffness of the cantilever beam.

k = (3 * E * I) / L³

E is the elastic modulus of the material (in N/m²), I is the moment of inertia of the cross section of the beam (in m⁴), and L is the length of the beam (in m).

At this time, assume the following values for the Z-shaped steel coupling member 130.

E = 200 GPa (200 × 10 ⁹ N/m²) for steel

I = 1 × 10 ^-6 m⁴ (moment of inertia)

L = 1m (length of Z-shaped steel joining member)

m = 5kg (mass of Z-shaped steel joining member)

Now, the stiffness (k) of the Z-shaped steel joining member 130 can be calculated.

k = (3 × 200 × 10 N/m² × 1 × 10 ^-6 m⁴) / (1m)³

k = 600N/m

Next, the natural frequency (f_n) of the Z-shaped steel coupling member 130 can be calculated.

f_n = (1 / 2π) * √(600N/m / 5kg)

4.9Hzf_n

4.9Hz

The high natural frequency indicates that the Z-shaped steel joining member 130 is less sensitive to vibration at low frequencies.

In addition to the natural frequency, the damping ratio (ζ) also plays an important role in vibration resistance.

The damping ratio (ζ) is a dimensionless value that represents the amount of energy dissipation in the system.

A higher damping ratio means that the Z-shaped steel coupling member 130 can dissipate more energy from vibration and reduce the impact on the footrest fixture 100.

The typical damping ratio of structural steel is between 0.01 and 0.05, with higher values indicating better damping performance.

The Z-shaped steel joining member 130 exhibits a natural frequency of 4.9 Hz and a damping ratio within the typical range for structural steel.

These factors, combined with the elasticity of the material, contribute to increased resistance to vibration and improved durability of the footrest fixture 100.

The following is an experimental example for examining the safety of the bolt and nut combination of the present invention.

In fact, engineers perform detailed calculations and analyzes based on actual conditions, materials, and shapes to ensure the stability of the Z-shaped steel joining member 130 and the footrest fixing device 100 under various vibration conditions.

The safety of the bolt and nut combination of the first fixing member 145 and the second fixing member 140 of the scaffold is examined to ensure that it does not come loose due to vibration.

In order to calculate the friction force at the bolt and nut joint of the first fixing member 145 and the second fixing member 140, the friction coefficient (μ), axial load (F_axial), and tightening torque (T) must first be calculated. .

The friction coefficient (μ) varies depending on the material and surface condition of the bolt and nut, and the typical value for steel bolts and nuts is μ = 0.2.

Axial load (F_axial) is the force exerted on the bolt and nut joint due to the weight of the scaffold and the additional load applied to the scaffold.

This value will vary depending on the specific use case and load conditions.

Tightening torque (T) is the force applied to the bolt to create tension and hold the joint together.

This value can be calculated using the following formula:

T = K * D * F axis

where K is the torque coefficient (typically 0.2 for steel bolts and nuts) and D is the nominal diameter of the bolt.

We can now calculate the friction force (F_friction) acting on the bolt and nut joint using the following formula:

F_friction = μ * F_axis

By substituting the values and assuming a given axial load (F_axial), we can calculate the friction force of the bolt and nut joint.

It should be noted that the friction force must be higher than the force generated by vibration in the actual field to prevent bolts and nuts from loosening.

In real-world applications, engineers often use additional measures such as locking nuts, thread-locking adhesives or locking washers to further protect bolted joints from vibration and other external forces.

At this time, the axial load and nominal diameter of the bolt are as follows.

F_axial = 2000 N (axial load due to weight of scaffold and additional load)

D = 10 mm (nominal diameter of bolt)

The tightening torque (T) can be calculated using the above formula, as shown below.

T = K * D * F axis

T=0.2*10mm*2000N

T = 4000Nmm

Next, the friction force (F_friction) of the bolt and nut joint can be calculated.

F_friction = μ * F_axis

F_Friction = 0.2 * 2000N

F_Friction = 400N

Now the force due to vibration (F_vibration) in the actual field is measured to be less than 300N.

Because the friction force (F_friction = 400N) is greater than the force due to vibration (F_vibration = 300N), the bolt and nut joint does not loosen under these conditions.

To prove that the force due to vibration (F_vibration) in a real field is less than 300N, and that the main source of vibration comes from nearby operating machinery, estimate the force due to vibration using the formula below.

F_vibration = m * a

At this time, m is the mass of the vibrating object (kg), and a is the acceleration due to vibration (unit of m/s²).

The mass (m) of the vibrating object is 50 kg, and the acceleration due to vibration (a) is measured to be 5 m/s².

Now we can calculate the force due to vibration (F_vibration).

F_vibration = m * a

F_Vibration = 50kg * 5m/s²

F_Vibration = 250N

Based on the above calculations, the force due to vibration (F_vibration = 250N) is less than 300N, which indicates that the friction force of the bolt and nut joint should be sufficient to prevent loosening.

Meanwhile, to estimate the force caused by the vibration caused by three adults running on a scaffold, the impulse-momentum principle can be used, which states that the change in momentum of an object is equal to the impact applied to the object.

Adults are running at a constant speed, and the main source of vibration comes from their footsteps hitting the footrest.

For example, if each adult weighs 100 kg, the total mass (m) is 300 kg.

When running, the average vertical jump speed (v) of each adult is 0.5 m/s, the duration of the impact force (Δt) for each step is 0.1 seconds, and the change in momentum (Δ) of one adult can be calculated.

Δp = m_individual * v

Δp = 100kg * 0.5m/s

Δp = 50kg*m/s

Since there are three adults, the combined change in momentum is:

Δp_total = 3 * Δ

Δp_total = 3 * 50kgm/s

Δp_total = 150kgm/s

At this time, the impact force (F_impact) for three adults can be calculated using the impulse-momentum principle.

F_impact = Δp_total/ Δt

F_impact = 150kg*m/s / 0.1s

F_Shock = 1500N

However, it should be noted that the impact force does not only act on the bolt and nut joint, but is distributed throughout the footrest fixture.

Additionally, the force due to vibration (F_vibration) becomes part of the impact force depending on factors such as damping and the natural frequency of the footplate. The footrest effectively attenuates the impact force and only 20% of the impact force is converted into vibration force.

F_Vibration = 0.2 * F_Shock

F_Vibration = 0.2 * 1500N

F_Vibration = 300N

At this time, the force due to vibration (F_vibration) is 300N, which is the limit set for the friction force of the bolt and nut joint.

To ensure safety and stability, consider additional measures such as lock nuts, screw adhesives or lock washers to further protect bolted joints from vibration.

Meanwhile, the Z-shaped steel coupling member 130 and the first fixing member 145 and the second fixing member 140 are,

They are made of steel, aluminum and other metals or metal alloys and are coated with corrosion-resistant materials to provide additional protection against environmental factors and extend the life of the scaffold fixture.

In other words, the present invention describes a foothold fixing device using a Z-shaped steel coupling member, specifically the materials and protective coating used in the construction of the Z-shaped steel coupling member 130 and the first and second fixing members 145 and 140. .

It is suggested that the above components may be made of various materials such as steel, aluminum or other suitable metals or metal alloys depending on factors such as strength, weight and cost requirements.

By using different materials or combinations of materials, scaffold fixture 100 can be tailored to specific application requirements, such as load-bearing capacity, durability, and resistance to environmental factors such as moisture, temperature, and chemical exposure.

In addition, it is emphasized that resistance to environmental factors that may cause corrosion or deterioration can be increased by coating the Z-shaped steel coupling member 130 and the first and second fixing members 145 and 140 with a corrosion-resistant material.

Over time, this protective coating may extend the life of the footrest fixture 100, making it more reliable and cost-effective in the long term.

Examples of such corrosion-resistant coatings include galvanizing finishes, which apply a layer of zinc to a metal surface, or powder coatings, which are applied as a dry powder and hardened by heat to form a hard protective layer.

Such a coating can prevent rust and other forms of corrosion to ensure structural integrity and durability of the scaffold fixture 100 over its useful life.

In summary, the importance of selecting appropriate materials and protective coatings for the Z-shaped steel coupling member 130 and the first and second fixing members 145 and 140 is emphasized in order to ensure the long life, durability and reliability of the scaffold. .

According to the present invention, it is possible to provide enhanced rigidity and a solid connection between the scaffold 110 and the horizontal support member 120 through the Z-shaped steel coupling member 130, thereby reducing the risk of accidents during construction. I do it.

Those skilled in the art to which the present invention pertains as described above will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, the embodiments described above should be understood in all respects as illustrative and not limiting.

The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

100: footrest
110: footrest
120: Horizontal support member
130: Z-shaped steel joining member
140: second fixing member
145: first fixing member

Claims (1)

In the footrest fixing device using a Z-shaped steel coupling member,
Z-shaped steel coupling member 130 connecting the footrest 110 and the horizontal support member 120;
A second fixing member 140 disposed at the top of the Z-shaped steel coupling member 130 and fixed to the lower end 115 of the footrest 110 by a fastening means; and,
A first fixing member 145 is disposed at the lower end of the Z-shaped steel coupling member 130 and fixed to the lower end 125 of the horizontal support member 120 by a fastening means,
The Z-shaped steel coupling member 130 is characterized in that it can provide enhanced rigidity and a solid connection between the footrest 110 and the horizontal support member 120,
The rigidity (k) of the Z-shaped steel coupling member 130 is characterized in that it is defined as shown in Equation 1 below,
The natural frequency (f_n) of the Z-shaped steel coupling member 130 is characterized in that it is defined as shown in Equation 2 below,
The Z-shaped steel coupling member 130, the first fixing member 145, and the second fixing member 140 are coated with a corrosion-resistant material to increase resistance to environmental factors that can cause corrosion or deterioration. A foothold fixing device using a Z-shaped steel joining member.
formula 1
k = (3 * E * I) / L³
where E is the elastic modulus of the material (in N/m²), I is the moment of inertia of the beam cross section (in m⁴), and L is the length of the beam (in m).
formula 2
f_n = (1 / 2π) * √(600N/m / 5kg)
f_n 4.9Hz