ゲルブ・ジャパン List of Products and Services

"Calmfloor" is an active vibration control device that immediately exhibits vibration suppression effects in response to sudden vibrations occurring at construction sites. It can be brought in when vibrations from heavy machinery operations, concrete pouring, or pile driving propagate to surrounding buildings, leading to complaints or risks of work interruption, and it can be operational right away. With a portable size and powered solely by electricity, it is well-suited for immediate response on-site. It is also useful as explanatory material for site managers and nearby residents. 【Features】 ■ Easy installation and immediate effectiveness: Can be used right away without disrupting the flow of construction. ■ Versatility: Effective during pile driving, heavy machinery operations, and when using vibrating tools. ■ Operates with just one power source: Automatically activates by simply connecting to a 100V outlet. *For more details, please download the PDF or feel free to contact us.

• Vibration Monitoring

The "vibration isolation device" using polyurethane vibration-damping material developed by our company for vibration countermeasures in press machines is excellent in weather resistance and oil resistance. Additionally, compared to rubber vibration-damping materials, it does not suffer from aging degradation and can be used for long periods. Despite its compact size, it achieves a vibration reduction effect of 10 to 20 dB, efficiently reducing vibrations and contributing to the improvement of the on-site environment. It can be easily installed on small and medium-sized press machines, and height adjustments can be made using height adjustment bolts. 【Features】 ■ Supports various loads ■ Excellent vibration isolation effect ■ Long-term usability *For more details, please download the PDF or feel free to contact us.

• Anti-vibration, earthquake-proof, vibration-isolating devices

The "Floating Floor Method" is an advanced technology designed to control vibrations within buildings and the propagation noise (solid sound) transmitted through structures. Our vibration isolation system demonstrates exceptional performance compared to other elastic pads, due to its low natural frequency. It can lower the natural frequency from 2.5Hz to 7Hz, making it an effective solution to protect areas that are very sensitive to vibrations from mechanical vibrations and solid sound. [Standard Vibration Isolation System by Gelb] ■ Conventional spring units placed under the supported object ■ Jack-up type embedded coil spring units *For more details, please download the PDF or feel free to contact us.

• others

When applying the mat slab method for vibration control, please compare it with Gelb's floating floor method. We will provide you with a proposal that offers cost benefits.

• Anti-vibration, earthquake-proof, vibration-isolating devices

This document explains the vibration isolation of vibration testing machines. We will discuss our proposal for floating foundations for vibration testing machines, the advantages of metal springs, and the vertical locking mechanism. For equipment that intentionally generates vibrations, such as vibration machines and earthquake simulators, it is important to implement vibration isolation measures to prevent testing losses. [Contents] ■ We propose floating foundations for vibration isolation of vibration testing machines. ■ The advantages of metal springs for vibration isolation of vibration testing machines are recognized. ■ Range of proposals from Gelb. ■ Vibration isolation is effective for frequencies above the value obtained by multiplying the natural frequency of the vibration isolation components by the square root of 2. ■ The vertical locking mechanism allows for the secure seating of floating foundations. *For more details, please download the PDF or feel free to contact us.

• Vibration Testing

The "GERB Vibration Isolation" is a vibration isolation system that uses an isolation frame to provide resistance against locking motion during clutch/brake operations. This device employs very high damping force to quickly stabilize the amplitude of the press, achieving comfortable and efficient workability. Additionally, it has numerous delivery records within the country. 【Features】 ■ Responds to locking motion (back-and-forth shaking) ■ Vibration isolation system using an isolation frame ■ Utilizes very high damping force ■ Quickly stabilizes the amplitude of the press *For more details, please download the PDF or feel free to contact us.

• Anti-vibration, earthquake-proof, vibration-isolating devices

We would like to introduce the vibration-damping support for recycling machinery. Our coil springs are designed and manufactured according to DIN standards, providing horizontal elastic properties and capable of accepting horizontal loads. This system protects the equipment during an earthquake. Additionally, the coil spring and damper are integrated, allowing for easy installation simply by placing them under the machine body, and they are also easy to replace. 【Benefits of Applying Gelb (Partial)】 ■ The coil spring system reduces dynamic load transmission from the machine body to the supporting structure to below 10 percent, maintaining a nearly vibration-free state. ■ Viscodampers, which provide damping force proportional to speed, work in conjunction with the coil spring system to absorb vibration energy and suppress large amplitudes generated during the machine's startup and shutdown due to resonance. *For more details, please download the PDF or feel free to contact us.

• others

Buildings adjacent to railways, such as hotels and music facilities, need to reduce the impact of vibrations and solid-borne noise generated during train operations, as they are integrated structures with railway facilities. Coil springs provide a higher vibration isolation effect than anti-vibration rubber. By using floating track slab technology, it is possible to reduce vibrations transmitted from the track to the building by one-tenth (-20dB to -30dB). We propose construction methods tailored to the type of track and site conditions. 【Advantages of the Gelb Method】 ■ Reduced number of installations due to high load-bearing coil springs ■ No need for stoppers due to horizontal rigidity ■ High corrosion resistance allows for outdoor application ■ Embedded slab design reduces installation height ■ Easy height adjustment with shims *For more details, please download the PDF or feel free to contact us.

• others

We would like to introduce our viscous dampers, "Viscodampers." These dampers feature a structure where a piston is immersed in a container filled with a viscous material. By adding damping force, the viscous damper suppresses oscillations, reducing amplitude even when vibrations occur at the resonance frequency, allowing for safe vibration control. We also offer a mat/pad called "NOVODAMP," made from a special polyurethane material. 【Features of Viscous Dampers】 ■ High damping force ■ Damping in three dimensions (x, y, z) ■ No maintenance required *For more details, please download the PDF or feel free to contact us.

• mat

We would like to introduce a case study of the floating floor method applied in a precision machinery manufacturing factory. In this factory, traffic vibrations from a nearby main road were occurring, leading to challenges in ensuring manufacturing quality and necessitating a high level of vibration isolation. As a response, we conducted on-site vibration measurements and considered countermeasures based on the results. We optimized the design and layout according to the specific conditions of the site. [Challenges] ■ The vibration isolation using conventional rubber materials was insufficient. ■ It was not possible to verify or predict the vibration isolation effect in advance. *For more details, please download the PDF or feel free to contact us.

• others

We would like to introduce examples of the application of floating floor methods in solid sound transmission countermeasures. Buildings adjacent to railways, such as hotels and music facilities, require measures to reduce the impact of vibrations and solid-borne sound generated during train operations, as the railway facilities are part of an integrated structure. At the Shanghai Symphony Hall, vibration and noise from nearby subway tracks were addressed through building support using coil springs, while a research facility implemented noise control measures with a floating floor structure using coil springs. 【Case Summary (Excerpt)】 <Shanghai Symphony Hall> ■ Purpose: Concert hall (vineyard type, 1,200 people) ■ Objective: Countermeasures for vibration and noise from nearby subway tracks ■ Specifications ・Building weight: 37,500t ・Vibration isolation natural frequency: 3.6Hz *For more details, please download the PDF or feel free to contact us.

• others

We would like to introduce a case study applying floating floor construction methods at a fitness (dance studio). The facility was concerned about vibration transmission to the hotel within the same building, and due to height restrictions for the new building, it was necessary to reduce the floor height to secure the number of guest room floors for the hotel. Therefore, we implemented height reduction by embedding coil springs into the floating floor and conducted on-site vibration measurements to confirm the vibration isolation effect after construction. [Challenges] ■ High-level vibration isolation performance is required as a countermeasure for fitness vibrations. ■ Conventional vibration isolation using rubber materials would require increasing the floor height, necessitating the reduction of one floor from the hotel. *For more details, please download the PDF or feel free to contact us.

• others

We would like to introduce a case where a floating floor method was applied in the audience hall of a concert arena. In this facility, there are nearby apartments, schools, and hospitals, and if problems become apparent after completion, it could hinder operations. There were challenges in verifying and predicting vibration isolation effects in advance. Therefore, we designed and examined the project according to the site conditions, quantitatively predicting the vibration isolation effects through desk studies. We also provided on-site support during construction. [Challenges] - A music hall within a complex facility, adjacent to hotels and commercial establishments - Few vibration isolation measures targeting low frequencies (2-3Hz) - Insufficient effectiveness of vibration isolation using rubber materials *For more details, please download the PDF or feel free to contact us.

• others

This document introduces examples of the application of "TMD" conducted by our company. It includes detailed cases such as a 370m long bridge, floor vibrations in stores, a 267.7m tall skyscraper, and a 45m tall hotel. We present these examples along with images and diagrams, making it a useful reference when considering implementation. We encourage you to read it and make use of it. 【Featured Cases】 ■ Bridges ■ Floor Vibrations ■ Skyscrapers ■ High-rise Buildings *For more details, please download the PDF or feel free to contact us.

• others

Our company conducts installation and adjustment work for viscous dampers and spring elements, as well as installation supervision work and measurement and analysis of vibrations and solid sounds generated by machinery and equipment. We provide economical vibration isolation foundations that meet customer requirements for various types of equipment. The technology for reducing vibrations has been researched and refined at Gelb for many years to ensure the safety and reliability of machinery. If you are troubled by even very small vibrations or noise in your surroundings, Gelb is here to support you. 【Areas of Activity (Partial)】 ■ Installation and adjustment work for viscous dampers and spring elements, as well as installation supervision work ■ Measurement and analysis of vibrations and solid sounds generated by machinery and equipment ■ Engineering from the provision of fabrication drawings for both reinforced structures and reinforced concrete structures to construction supervision ■ Foundation design for machinery and equipment or building structures, considering cost-effectiveness based on customer specifications *For more details, please download the PDF or feel free to contact us.

• others

This document provides a detailed explanation of "railway track vibration control." It includes solutions such as "gel-based solutions for controlling solid-borne sound and vibrations," as well as "solutions using metal coil spring devices" and "solutions using NOVODAMP closed-cell polyurethane." Additionally, it presents examples of achievements along with images, making it a useful reference. We encourage you to read it. 【Contents (partial)】 ■ Vibration control and track stiffness adjustment sections using floating slab track systems ■ Gel-based solutions for controlling solid-borne sound and vibrations ■ Solutions using metal coil spring devices ■ Solutions using NOVODAMP closed-cell polyurethane *For more details, please download the PDF or feel free to contact us.

• others

Our company proposes the "floating floor method" as a vibration control measure for vibration testing machines. By suppressing losses during vibration testing due to low natural frequencies, it contributes to obtaining accurate test results. Its space-saving design allows for flexible adaptation to installation location constraints. Additionally, it can reduce natural frequencies from 2.5Hz to 7Hz, protecting sensitive work areas, such as those handling precision instruments, from mechanical vibrations and solid noise. 【Features】 ■ High vibration isolation performance contributes to improved accuracy in vibration testing ■ Capable of reducing natural frequencies from 2.5Hz to 7Hz ■ Space-saving design makes it easy to implement even in limited installation spaces *For more details, please refer to the materials. Feel free to contact us as well.

• others

This document introduces the elastic support of power plant structures and equipment. It provides detailed information on "vibration control" and "earthquake measures." Additionally, it discusses "adjustments during ground subsidence" using a gel elastic support system. The content is presented clearly with images and diagrams, making it a useful reference when considering implementation. We encourage you to read it and make use of it. 【Contents (partial)】 ■ Vibration measures for power plant structures and equipment ■ Vibration control ■ Earthquake measures ■ Adjustments during ground subsidence *For more details, please download the PDF or feel free to contact us.

• others

This document introduces examples of vibration isolation buildings adopted overseas, aimed at assisting measures against railway vibrations. It includes cases such as the vibration isolation building used in the Shanghai Symphony Hall, completed in 2014 in Shanghai, China, as well as examples of subway vibration countermeasures in the newly constructed office building and classroom-laboratory building at Peking University, and vibration countermeasures for track vibration using NOVODAMP(R). Please take a moment to read it. [Contents] ■ Introduction ■ Characteristics of railway vibrations and applicable standards ■ Examples of railway vibration countermeasures ■ Conclusion *For more details, please refer to the PDF document or feel free to contact us.

• Anti-vibration, earthquake-proof, vibration-isolating devices

This document introduces a case (conducted in 2017) where complaints from neighboring residents arose due to vibration propagation caused by a 1000T press equipped with other types of vibration isolation devices at the time of its new installation. The aim was to improve vibration isolation performance. It includes tables summarizing the specifications of the target press, proposed vibration isolation specifications, and measurement results at the site boundary, as well as diagrams summarizing press amplitude calculation results and vibration level measurement results. Please take a moment to read it. [Contents] ■ Introduction ■ Vibration isolation proposal for the target press ■ Installation of vibration isolation devices ■ Results of vibration isolation performance verification ■ Conclusion *For more details, please refer to the PDF document or feel free to contact us.

• Anti-vibration, earthquake-proof, vibration-isolating devices

This document introduces vibration control measures for buildings and mechanical equipment using TMD (Tuned Mass Dampers). Since supplying TMD for the vertical vibration control of cable-stayed bridges in 1987, Gelb has a wealth of experience in providing solutions for horizontal vibrations in skyscrapers, control towers, observation towers, and vertical vibrations in bridge girders and large-span floors. Vertical vibration control is applied to structures such as long-span beams, bridge girders, stairs, and stadium roofs. The TMD, which operates in the vertical direction, consists of coil springs and viscous dampers and has been adopted for pedestrian vibration control, exemplified by the London Millennium Bridge, as well as for traffic vibration control on the Hong Kong-Zhuhai-Macao Bridge. Additionally, an AMD (Active Mass Damper) was installed as a vertical vibration control measure directly beneath a concert hall in a hotel in Las Vegas, and local measurements confirmed the effectiveness of vibration reduction. [Contents] ■ Introduction ■ TMD for High-Rise Buildings ■ TMD for Earthquakes ■ Vertical Vibration Control *For more details, please refer to the PDF document or feel free to contact us.

• Anti-vibration, earthquake-proof, vibration-isolating devices

Our company's "Floating Floor and Floating Room Method" is a noise and vibration control method for partial floor areas or specific rooms within a building. It involves "vibration isolation," which controls the transmission of noise and vibrations generated on the floor or in the room to the outside, and "vibration damping," which controls the transmission of external noise and vibrations to the floor or inside the room. The former, vibration isolation, is applicable to fitness studios, dance halls, live houses, and helipads, while the latter, vibration damping, is suitable for semiconductor manufacturing equipment, television studios, recording studios, and concert halls. 【Features】 ■ High vibration isolation effect with a natural frequency of 3-5Hz ■ Provides a floating floor system that can reduce floor height ■ Composed of floating slabs with springs embedded ■ Shim insertion into the unit is also possible ■ Structure allows for level adjustment of floor finishes *For more details, please refer to the PDF materials or feel free to contact us.

• Anti-vibration, earthquake-proof, vibration-isolating devices

This is an introduction to the Gelb Vibration Isolation System, which is equipped with seismic isolation features from the perspective of earthquake measures for press machines. Our company has been supplying metal coil springs and damper devices that withstand earthquakes for various large machines for several decades. For example, properly designed elastic support systems have protected turbine generators in thermal and nuclear power plants in many countries from earthquakes. These ideas have gradually evolved, and today, more efficient earthquake countermeasure systems are applied to many machines, equipment, and buildings. **Features of the Gelb Vibration Isolation System** - Composed of metal coil springs and viscous dampers - Flexibly supported using metal coil springs - Reduces ground vibrations generated during the production operation of press machines - The resistance generated by the viscous damper suppresses the persistence of machine vibrations - Effective in three-dimensional directions and capable of operating in the horizontal direction as well - Maintenance-free due to the absence of friction sliding parts, eliminating aging deterioration *For more details, please refer to the PDF materials or feel free to contact us.*

• Anti-vibration, earthquake-proof, vibration-isolating devices

This is an introduction to our company's "vibration control measures for servo presses." The reason why excessive press vibration is problematic is that it continues until the next operation, leading to a decrease in precision. Our vibration control device features a structure where the coil spring and the viscous damper VISCODAMPER are independent of each other. As a result, by adjusting the coil spring to lower the natural frequency of the vibration control system, we enhance the vibration control effect, while increasing the damping force of the viscous damper allows for rapid convergence of the vibrations. [Features] - Independent structure of the coil spring and viscous damper VISCODAMPER - Enhanced vibration control effect by lowering the natural frequency of the vibration control system - Increased damping force of the viscous damper - Enables rapid convergence of vibrations *For more details, please refer to the PDF document or feel free to contact us.

• Anti-vibration, earthquake-proof, vibration-isolating devices

We would like to introduce our "Vibration Control Measures for Power Plant Equipment." The equipment used in power plants, such as turbines, feed pumps, and coal mills, generates unwanted vibrations, which typically require heavy foundation systems. By introducing our elastic support, the foundation can be significantly reduced, allowing for savings in both construction time and costs. The spring-based support method for turbines has been developed by us in collaboration with multiple turbine manufacturers. This system was first adopted in 1968 for supporting a 600MW turbine at a nuclear power plant and has since been used for turbines up to 1600MW, being utilized worldwide. 【Features】 ■ Prevention of damage to turbine equipment caused by earthquakes ■ Reduction of foundation construction costs and time ■ Expansion of available space for condensers and piping under the turbine ■ Ability to separate the turbine foundation from the substructure made of columns and beams, blocking vibration transmission ■ Possibility to integrate the above substructure with the turbine building ■ Easy adjustment of the turbine deck height in case of uneven foundation settlement *For more details, please refer to the PDF materials or feel free to contact us.

• Anti-vibration, earthquake-proof, vibration-isolating devices

Gelb Japan designs and provides optimal vibration isolation devices for your recycling equipment. Our specialized staff will visit for on-site surveys to conduct vibration measurements, so please feel free to contact us. - Reduce construction time and costs! By introducing Gelb's vibration isolation system, it is possible to reduce the need for heavy foundation blocks. Additionally, the foundation pit itself can also be minimized. - High vibration isolation performance! Gelb's vibration isolation devices exhibit high vibration isolation effects against vibrations from all directions. - Maintenance-free! The durable coil springs and Viscodampers (high-damping viscous dampers) possess excellent resistance to aging, maintaining high vibration isolation performance over the long term. Therefore, they are maintenance-free. - Easy level adjustment! Settling or tilting of the foundation can be easily adjusted using shims. - Increased productivity! By blocking vibrations, precision equipment that is normally sensitive to vibrations can be installed nearby. - Double effect of vibration isolation and seismic isolation! The vibration isolation devices also provide seismic isolation effects, making them effective for earthquake measures. - Vibration measurement support! Our specialized staff will conduct vibration measurements before and after the installation of the vibration isolation devices, allowing you to experience the effects of vibration isolation in numerical terms.

• Anti-vibration, earthquake-proof, vibration-isolating devices

In recent years, the precision required for measuring instruments and processing machines has become increasingly strict, and there are many cases where vibrations generated from both inside and outside buildings have a fatal impact on measurements and processing. To block vibrations from vehicles and trains running on roads, as well as vibrations from equipment used on different floors within the same building, there is a "floating floor vibration isolation system" designed to mitigate vibrations from gymnasiums, dance floors, and other areas. By supporting the floor with springs, this system blocks vibrations from the ground or to the ground. Most floating floor vibration isolation systems in Japan use rubber. However, rubber deteriorates over time, which can lead to a failure to achieve the intended effects. Deteriorated rubber needs to be replaced, resulting in maintenance costs and replacement work. Gelb's vibration isolation devices use durable coil springs, allowing them to maintain high vibration isolation performance over the long term. This reduces maintenance costs and labor.

• Anti-vibration, earthquake-proof, vibration-isolating devices

Users of power plants and turbine manufacturers place importance on the following benefits: • Prevention of damage to turbine equipment due to earthquakes • Reduction of foundation construction costs and time • Expansion of available space for condensers and piping under the turbine • Ability to separate the turbine foundation from the substructure consisting of columns and beams, thereby blocking vibration transmission • Possibility of integrating the above substructure with the turbine building • Ease of adjusting the height of the turbine deck in the event of uneven settlement of the foundation, even allowing for adjustments while continuing operation

• Anti-vibration, earthquake-proof, vibration-isolating devices

Buildings/devices shaking is a problem. You want to take measures against vibrations but don’t know how… This is for you! Gelb Japan, with proven results in Europe and Japan, will propose the optimal device. What is TMD? It stands for Tuned Mass Damper. It suppresses vibrations of the target object by attaching a weight (mass) to the device. It is effective in both vertical and horizontal directions. As a passive type damper, it does not require power or other energy for operation, providing stable performance. It is effective for structures like cantilever balconies, where it is difficult to increase rigidity. Gelb's TMD has been used in the Millennium Bridge in London, UK, and has numerous achievements worldwide. (Target examples: bridges, stairs, stadium roofs, chimneys, masts, etc.)

• Anti-vibration, earthquake-proof, vibration-isolating devices

We would like to introduce our company's "Vibration Mitigation Measures for Railway Tracks." The importance of railways with excellent eco-performance as a solution to 21st-century transportation issues is increasing. However, various types of railways, including linear railways, cannot ignore the vibrations transmitted to the surrounding areas. Our "Gelb Floating Slab Track System" significantly reduces the vibrations propagated to the surroundings during train operation and effectively functions as a solid sound mitigation measure. [Features] - The natural frequency of the vibration mitigation device can be designed to approximately 4 to 8 Hz. - The vibration mitigation device can be embedded within the slab. - Installation and replacement of the spring unit can be performed from above the track slab. - High horizontal rigidity allows for minimal lateral deformation during train operation and small to medium earthquakes. - Durable coil springs and viscous dampers are maintenance-free. *For more details, please refer to the PDF materials or feel free to contact us.

• Anti-vibration, earthquake-proof, vibration-isolating devices

We will introduce "Earthquake measures for buildings and machinery equipment." Our company has a long track record in earthquake measures for heavy machinery. Vibration control devices for turbine generators at nuclear and thermal power plants have been in use for over 40 years and are still operational worldwide. The scope of our earthquake measures extends widely to nuclear and thermal power plants, petrochemical and gas plants, high-pressure transformer equipment, and vibration-sensitive research equipment. 【Earthquake Measures System】 ■ Base Control System (BCS) ■ Tuned Mass Damper (TMD) *For more details, please refer to the PDF materials or feel free to contact us.

• Anti-vibration, earthquake-proof, vibration-isolating devices

We would like to introduce our "Viscous Damper for Piping." This product is used to prevent vibration and damage in the piping of power plants and industrial plants. It is derived from viscous dampers that have been used in mechanical foundation systems alongside coil springs for over 50 years. The development of the viscous damper for piping began in the 1970s when users of nuclear power plants sought a low-cost, maintenance-free alternative to vibration isolators (snubbers). 【Features】 ■ Provides damping force in all degrees of freedom ■ Damping force is transmitted through a viscous medium, eliminating mechanical friction and sliding ■ Uses chemically stable viscous materials, ensuring high durability ■ Does not support static loads such as its own weight ■ Does not restrain low-speed movements like thermal expansion *For more details, please refer to the PDF document or feel free to contact us.

• Anti-vibration, earthquake-proof, vibration-isolating devices

We would like to introduce our "Vibration Control Measures for Presses and Hammers." Presses and forging hammers used in metal forming generate significant kinetic energy, a portion of which is dissipated into the ground, resulting in high vibration levels. In presses, vibrations are primarily generated by the instantaneous release of stress occurring in the press frame during the metal forming process. By utilizing our viscous damper "VISCODAMPER integrated coil spring vibration isolation device" for direct support, it is possible to reduce the foundation, thereby lowering costs and construction time. 【Features】 - Reduction of heavy foundation blocks allows for decreased construction time and costs. - Vibration-sensitive equipment can be installed adjacent, improving production efficiency. - Compared to conventional methods, the reduction in vibration is achieved by at least 80% for hammers and 90% for presses. - The viscous damper contributes to improved stability of the machinery and vibration isolation effects. - Level adjustments for presses and hammers due to foundation settlement or tilting are made easy. *For more details, please refer to the PDF document or feel free to contact us.

• Plastic processing machines (cutting and rolling)

This is an introduction to our "Vibration Control Measures for Diesel and Gas Generators." Large gas and diesel generators are used for various applications. The main objectives of vibration control in this application are to reduce the transmission of vibrations from the engine, which is the source of vibration, to the surrounding environment, and to decrease raw material costs and construction time by reducing the size of the foundation. Our vibration control devices consist of metal coil springs and viscous dampers, and are placed under the frame where the engine is located. [Features] - Vibrations transmitted from the engine to the ground are effectively eliminated. - Dynamic forces applied to the foundation are reduced. - Durable coil springs and viscous dampers. - Forces applied to the installation site are limited to almost static forces. - Height readjustment is easily achievable by adding shims to the spring elements. - Vibration control effects are obtained along with seismic isolation effects. *For more details, please refer to the PDF document or feel free to contact us.

• Other safety equipment