Tag: ergonomics

Electric Carts Ease Strain of Push-Pull Tasks

Pushing and pulling are the two most required actions in industrial and business settings. Unfortunately, pushing and pulling can place extreme stress on a worker’s body, often resulting in back, groin and other musculoskeletal injuries. Injuries can cost an individual business thousands of dollars each year in medical, insurance, disability and lost man-hour costs. An ergonomically designed electric cart pusher and motorized cart puller eliminates the physical strain of manually pushing and pulling heavy carts and wheeled equipment. An investment in ergonomic equipment is a sound investment in the health and safety of your workforce that can save your business thousands of dollars in unnecessary medical and insurance costs.

In manufacturing and distribution settings, the most common solutions to material handling tasks are:

  • to place products, parts and equipment on pallets for handling or
  • to utilize racks, carts and casters to move materials.

Electric carts come in a variety of shapes, sizes and configurations to fit the demands of the task and the capabilities of your workforce. An ergonomically-designed cart mover reduces the amount of force that must be exerted by the operator to maneuver a load. Various cart and wheel configurations are available to meet the needs of any task.

  • Carts, racks or equipment with casters can be easily turned and maneuvered with a CartCaddy power tug that feature a 5th wheel turning method.
  • Carts, racks or equipment with 4 swiveling casters require a cart with back end control.
  • Specialized CartCaddies and an electric tug have been designed to handle carts or equipment that have straight wheels or are on a rail.

Visit the DJ Products website to view our complete line of ergonomic electric carts, trucks and lifts. We offer ergonomic solutions for material handling applications.

Pushing vs Pulling Manual Carts

Pushing and pulling are the two most frequent actions workers execute in the course of doing their jobs. So in maneuvering manual carts, which is easier for the worker and creates less risk of injury — pushing or pulling?

Experts say pushing is preferable to pulling for a number of reasons. Research has demonstrated that people are able to exert higher push forces than pull forces. Given that horizontal push force, not the weight of the load or equipment, is the most significant factor in determining the effort required to move a load, that’s a significant consideration in selecting equipment.

Think of what happens to the body when you push something. Your entire body is used to create push force. In pushing an object, your body is more centered which allows you to concentrate force. Limbs are generally held closer to the body, limiting the possibility of extension injuries.

Pulling on the other hand, creates tremendous stress on individual body parts. When you pull an object and you are facing the direction of travel, one arm is stretched behind your body. This places the shoulder and back in awkward postures, increasing the potential for painful injury through overextension or awkward twisting. If you use two hands to pull an object you must have your back to the direction of travel. Walking backwards without a clear view of your path is an invitation to an accident. On an incline momentum can increase unexpectedly and the cart can careen into the worker or “run over” his feet.

There are times when pulling is the only way to maneuver a manual cart into the proper position, but at all other times pulling should be avoided. Pushing is the safer, more ergonomic way to move a manual cart.

Congress Debates Increasing Fines for Worker Injury, Death

Congress is being urged to increase financial penalties for workplace injuries and deaths, according to congressional testimony reported by McClatchy Newspapers. In last week’s hearing before the U.S. House Education and Labor Committee, workers’ advocate groups squared off against industry safety experts to debate increasing penalties when employers don’t protect their workers against hazardous conditions.

Workers’ advocates pressured the federal government to drastically increase fines and implement possible criminal prosecution for senior executives when workers are killed or seriously injured on the job. “The thought process has to be, ‘If I keep doing this, and I keep letting this happen. … I could go to jail,'” David Uhlmann of the University of Michigan School of Law and a former U.S. Department of Justice official, told the House Committee.

Speaking for the opposing view, a workplace safety attorney who helps businesses figure out how to respond appropriately to U.S. labor laws, recommended more clearly defined labor safety laws and more stringent enforcement of existing penalties for employers who exhibit a “callous disregard” for workers’ safety. “There needs to be a balance,” Lawrence Halprin, a lawyer with Keller and Heckman, told the House Committee, noting that confusing labor regulations often contribute to the creation of workplace hazards.

Last week’s hearing was one more volley in the Congressional debate that is accompanying preparation of anticipated legislation to overhaul the 39-year-old Occupational Safety and Health Act (OSHA). With the Obama administration’s apparent blessing, House Democrats are preparing to give OSHA a new and sharper set of teeth. New regulations being considered would dramatically increase employers’ penalties, increase business owners’ accountability and protect workers who speak out about workplace violations. OSHA penalties have not been updated since 1990, and financial penalties were never indexed to inflation. Current penalties for the injury or death of a worker often total just a few thousand dollars.

“Penalties must be meaningful,” said Rep. George Miller, a California Democrat and chairman of the House Education and Labor Committee. “They must function to deter violations. They must get people’s attention.”

However, some committee members are concerned that their Congressional peers may be unduly swayed by the many stories of personal tragedy that have peppered the hearings. Rep. Tom Price, a Georgia Republican, noting that workplace fatalities have declined since 1994, said, “Sometimes Congress gets emotional and draws the wrong conclusions and makes the wrong laws.” Time will tell what happens here, but you might want to weigh in with your Congressman and tell him how you feel.

Handhold Design Can Improve Worker Efficiency

Most carts have handholds of one sort or another. Handles are such an ordinary part of everyday equipment that it’s easy to ignore their importance in efficient equipment use. But handholds are the link between the operator and the load. Handholds cue the operator on how much force to exert and where to apply it most effectively to move the load. Handhold placement and design on carts can increase or decrease the ease and efficiency with which a worker moves a load.

In evaluating the usefulness of a cart, consider these important elements of handhold design:

  • Handhold Height. Handhold height defines the operator’s posture, and posture determines the amount of force a person is able to generate when moving a cart. Given the difference in human size, no single handhold height will be optimal for all workers. Handholds that cause operators to bend or stoop can lead to musculoskeletal injuries. When handholds are located at the proper height for an individual’s body, he is able to exert maximum force without straining his body. An adjustable handhold system will accommodate workers of various sizes. Other solutions include a continuous vertical handhold system that can be grasped at any point along its length or a series of handholds at varying heights.
  • Handhold Width. Handholds should allow the operator to grip the cart near its outer edge to provide maximum leverage for turning and positioning. However it’s important that hands, fingers or arms not protrude beyond the side of the cart to prevent crushing injuries should the cart come in contact with a wall or other equipment.
  • Handhold Type. The type of handhold can dramatically affect the amount of force an operator is able to exert when maneuvering a cart. Poor coupling, the contact between hands and equipment, can decrease the force an operator can exert by 65%. Handhold shape should not concentrate pressure on any specific area of the hand. There should be no sharp edges or pronounced ridges. Both the palm of the hand and the fingers should be able to contact the handhold which should be wide enough to accommodate the entire hand.
    Note: Pulling tasks require a handhold that can be gripped with the fingers wrapping around the handle. Pushing tasks need only a good surface that provides stable hand/equipment coupling.

Efficient Wheel Design Reduces Friction

Friction occurs when two surfaces come into contact, as when a wheel rests on a floor. Friction is the force that resists movement between the objects. Under theoretically perfect conditions, the ideal wheel environment would be a hard, smooth wheel rolling over a hard, smooth surface. In real life, perfect conditions never exist. In a typical work environment, using a hard wheel will often result in higher rolling resistance, as well as increased noise and vibration.

Both static and dynamic forces affect friction. The initial push force necessary to place an object in motion is the static force. Static force is generally greater than dynamic force which is the exertion necessary to keep the object moving. Wheel design must consider bother static and dynamic force.

In a wheel or caster system, there are three places where friction can affect force:

  • at the point where the axle and wheel interface;
  • if a swivel caster, in the swivel housing; and
  • at the ground/wheel interface, particularly at any points where the wheel will slide or pivot on a surface.

The efficiency of a wheel or caster in reducing friction is dependent not only upon the appropriate design of the wheel itself, but also on the materials used in its construction and the placement of the wheels on the equipment to be moved.

The Cost of Ignoring Ergonomics

Back in industry’s dark ages, equipment was designed to do a task without much thought to the comfort or safety of the worker who would be operating it. Back injuries, tendonitis, carpal tunnel syndrome and other stress and repetitive motion injuries were an aggravating and often debilitating part of the job. The toll wasn’t just on the workers, industry paid a price in decreased productivity, poor product quality, increased medical and workers’ compensation costs, low morale and high absenteeism. The annual price tag for workplace injury and illness is estimated at $171 billion.

That’s a pretty hefty price tag considering that America spends about $170 billion a year on cancer and $164 billion on cardiovascular disease, the country’s two biggest killers. According to an American Medical Association study, each year in America there are 6,500 deaths from workplace injuries and more than 60,000 deaths from workplace-related diseases. Non-fatal workplace injuries number 13.2 million annually with 862,000 illnesses. That’s a staggering price in human suffering and industry dollars. The total cost of workplace injuries is nearly equal to the combined annual profits of America’s 20 largest companies.

But that’s just part of the picture. Workers’ compensation claims already cost American businesses $60 billion annually, according to the U.S. Department of Labor. More than 50% of those claims are for back injuries from lifting, pulling, pushing and straining, says the National Council on Compensation Insurance. In fact, workplace back injuries, which involve lengthy and costly treatment, affect more than 1.75 million workers each year, according to the Bureau of Labor Statistics. Add in the estimated time-lost cost per injury of $26,000 per incident and the prevention of a single injury can result in an immediate savings of $26,000.

This staggering cost and the desire to provide American workers with healthier and safer working conditions gave rise to ergonomics and the beginning of a radical change in the way industry approaches equipment design.

Next time: The rise of ergonomics in industrial design.

Why Ergonomic Equipment Makes Smart Sense

With the loss of time on the job and the expense of injuries billed to Workman’s Compensation or for that matter even the legal representation in a liability law suit, the initial investment in ergonomic equipment for your warehouse and maintenance staff is a good investment.

Wikipedia defines ergonomics in this statement:
“Ergonomics is the scientific discipline concerned with designing according to human needs, and the profession that applies theory, principles, data and methods to design in order to optimize human well-being and overall system performance. [2] The field is also called human engineering, and human factors.”

When you invest in equipment that helps to protect your employees and staff from injury, you are investing in increased productivity, potentially lower legal costs for your business, and better employee morale and health.

Ergonomic engineered equipment may initially cost more than other equipment but in the big scheme they may very well be the investment that you simply should not overlook. With over exertion being one of the leading workman’s compensation claims in a document provided by the State of Washington with an average incurred medical cost of $7,233 the investment in machinery that does the heavy work in the warehouse, factory floor, or facility is simply a smart investment in protecting your business from potential medical expenses and legal fees.

To put this in perspective, just in Washington State alone, the Washington State Department of Labor and Industries reported that in 2008 that there were 24,667 claims for overexertion with a total incurred cost of $178,414,838 with an average claim size of $7,233. This is just for one state! Tally this up in 50 states and employee overexertion is one of the key injuries that many companies can work to prevent by supplying equipment that helps protect the employee from overexertion on the job.

If you are not aware of the new equipment that is available to make your staff work more carefully, prevent over exertion, and to increase productivity, we invite you to visit the website of DJ Products the specialist in pullers, movers, motorized carts, electric cart pushers, and CartCaddy dolly movers. They will be happy to provide the information you need to make the “right “ equipment purchase for your specific needs.

Lifting Tips that Prevent Back Injury

In our last post we talked about the exorbitant cost of back injuries to industry. In both human and financial cost, back injuries take an expensive toll. Application of ergonomic principles to the work space and use of ergonomically designed equipment can reduce potential back injury significantly. But sometimes materials must be manually lifted and moved.

It’s important to train workers in proper lifting techniques. Musculoskeletal injuries, particularly to the lower back, can result when items are improperly lifted. The key to developing good lifting habits is to think about what you plan to do before picking up an object. Practice these safe lifting tips:

  • Size up the load and check surrounding conditions. Get help with the lift if the object looks heavy or awkward. Make sure you have good footing and enough space to maneuver easily. If the object must be carried, may sure your path is free and clear of obstacles.
  • Balance your body. Your feet should be shoulder width apart and beside each other. To provide maximum balance and leverage, your feet should be positioned somewhat behind the object to be lifted.
  • When lifting, don’t stoop. Bend both knees and keep your back straight but not vertical. Tucking in your chin will help you keep your back straight.
  • Use your hands and fingers to grip the load. Called a palm grip, this grip provides maximum security. Remember to tuck in your chin before you lift.
  • Use your body weight to get the load moving. Lift by pushing up with your legs, your body’s strongest muscle group.
  • Keep arms and elbows close to the body while lifting to provide better balance and maximize lift force.
  • If you must carry an object, carry it close to your body and don’t twist. Shift your foot position and turn your whole body to change direction.
  • Remember to watch where you’re going.
  • Bend your knees when lowering an object. Avoid stooping which places unnecessary strain on your lower back. Place the object on the edge of a shelf, bench or other surface and slide it back into position. Keep your hands and feet clear as you let go of the object.

Even when lifting or moving light-weight objects, it pays to develop good lifing and carrying habits. Your back will thank you!

Does Obama Have Muscle to Win Ergonomics Fight?

Like actor Mickey Rourke’s amazing return to the Hollywood ring in The Wrestler, labor is back; and President Obama is in its corner cheering its revival. After eight years struggling on the ropes during the Bush administration, labor has bounced back into the Washington ring and is gaining strength — and it’s bringing the ergonomics fight with it.

“I do not view the labor movement as part of the problem; to me it’s part of the solution,” President Obama was widely quoted as saying recently. During his campaign, Obama repeatedly promised American workers a safer, healthier work environment. Industry watchers have taken that to mean a return to and an expansion of the ergonomic standards initiated during the Clinton administration but quickly rescinded under Bush. With a Democratic-controlled Congress backing him up, Obama appears to have the muscle to force ergonomics back into the legislative ring.

By naming California Democratic Representative Hilda Solis as his new Labor Secretary, Obama appears to be saying to U.S. industry and the U.S. Chamber of Commerce, a long-time vocal foe of ergonomics legislation, “Bring it on!” Although she’s still running the confirmation gauntlet, Solis has received the recommendation of the Senate Health, Education, Labor and Pensions Committee and is expected to be confirmed, possibly as soon as tomorrow.

The daughter of immigrants and union workers, Solis has long ties to labor groups and has been a champion of ergonomics in the workplace since joining the House of Representatives in 2001. Her home state of California is the only state in the U.S. that mandates ergonomic standards that force employers to provide a safe and healthy work environment for their workers. Concerned about the cost of implementing ergonomic standards, those opposed to ergonomic legislation fear that California’s tough ergonomics rules will be used to create a national model.

That Obama would eventually grapple with ergonomics to improve labor conditions has been a given since his campaign days. But there’s been a lot of speculation in the industry and in Washington about how and when Obama would try to take down ergonomic opponents. By calling Solis into his corner, Obama seems to be getting ready to enter the ring. It will be interesting to listen to the President’s State of the Union speech tomorrow night. A direct statement about ergonomics or workplace safety could indicate that the fight is on!

Adoption of Ergonomic Program Can Deflect Workforce Crisis

U.S. industry is headed toward a workforce crisis that will require critical changes in our national paradigm. Our workforce is not only declining in numbers, it is becoming increasingly multicultural. Even more challenging is the fact that workers now entering the workforce expect greater challenge and greater rewards from their jobs than their predecessors. In the keynote speech at last summer’s Material Handling and Logistics Summit, Benoit Montreuil, president of the College Industry Council on Material Handling Education, warned that long-term solutions to the pending workforce crisis will require American industry to adjust its attitude toward its workforce and develop new programs to protect the health and safety of that workforce. Continue reading “Adoption of Ergonomic Program Can Deflect Workforce Crisis”