Hand Tools and Devices
Ergonomically oriented hand tool design:
Maintain a straight wrist Maintain a straight wrist
Bent Nose Pliers. Such tools permit grasping, cutting, or turning objects while the wrist remains in a relatively straight position. Hammer With Deviated Handle. The slightly bent handle maintains a straight wrist during the final impact position.
Maintain a straight wrist Maintain a straight wrist
Soldering Iron. The perpendicular bend of the head permits application of heat to a distal object while avoiding deviation of the wrist. Saws, Power Wrench, Knife. A perpendicular handle (pistol grip) maintains a straight wrist during cutting, sawing, or rotary operations such as drilling or nut tightening.
Maintain a straight wrist Provide an optimal grip span
Cylindrical Handle. A tool for rotary action on a horizontal work piece maintain the wrist in a straight position. Excessive grip span does not allow optimal application of force and imposes undue stress upon the joints.
Avoid tissue compression Protect against heat, cold, vibration extremes
Excessively thin or short handles cause small surface areas which in turn cause excessive pressure on tissues, leading to loss of local circulation. Circulation is also affected by other factors such as vibration and temperature extremes from the tool of from the immediate environment. Gloves and insulating materials are used as protective devices.
Second handle Expanding spring
An additional handle for powered tools, located near the front end, helps support a heavy tool, resistance to excessive torque, and safe placement of the tool on to the work piece.
Expanding spring on handles opens handles without stressful operator effort.
Thumb stop Gloves
A thumb stop improves stability, increases thrust force, and avoids slippage. Gloves may be unavoidably used in inclement circumstances. Compensations must be made, when gloves are used, for a diminished grip force, diminished manual dexterity, and increased bulkiness which requires large handle dimensions.
General considerations Loss of grip
The functional assignment of the hands. Hands, when used with a tool, may be classified into the holding hand and the assisting hand. Dropped Tool. Power saw dropped on foot.
Loss of grip Loss of grip
Slipping Hazard. Hand slips on to unguarded surface. Curved Knife Guard.
Loss of grip Loss of grip
Knife. Ring guard. Enclosure for one finger. Knife. Handle guard. Enclosure for all fingers.
Balanced power tool Second handle
Handle located at center of gravity. A second handle near the front of a large tool allows added control. A second handle will also aid in resisting high torque forces.
Crushing in between Accidental activation
Handle Stops. Handle stops allowing at least 2.5 cm clearance prevent crushing fingers between handles.
A. When considering what piece of equipment to use for a job, you should consider what the task is, what tools you have to hand and which tool can be used most safely, appropriately and efficiently.
I can only hold my mug with my thumb and little finger. I’m pretty helpless; only when a man has lost any fingers does he see how much he needs them for the smallest jobs. The best thing I can do with the little finger is to shoot with it. My hands are finished” ().
Manual Handling is specifically regulated for in Chapter 4, Part 2 of the Safety, Health and Welfare at Work, (General Applications) Regulations 2007 (S.I. no. 299 of 2007). In the Regulations, Manual Handling is defined as any transporting or supporting of any load by one or more employees, and includes lifting, putting down, pushing ,pulling, carrying or moving a load, which by reason of its characteristics or unfavourable ergonomic conditions, involves risk, particularly of back injury, to employees.
The Hand Held Tee is exactly what it sounds like, a tee that can be held in the hand of the
The tools symbolize the steps Estrella must take in becoming better in understanding. In the beginning, Estrella describes the tools as “funny shaped objects” and “confusing ad foreign as the alphabet she could not decipher.” Towards the middle, Perfecto Flores tells Estrella,” If that doesn’t work, because your manitas aren’t strong yet, fasten the vise pliers, these, then twist the pliers with your hammer.” This quote shows how Estrella would have to or used many different steps to help in the realization that things that aren’t understood would be over time and are important. Over the course of the excerpt the tools are more understood and their purpose is described. Just like Estrella did over the course of the
hand. You can also see the vast drop that he may face if he loses his
The nail clipper has two main parts that are bolted together and provide the necessary leverage to trim the nail. Attached to the base of the nail clipper is a file that is connected by a circular shaft that allows you to rotate the file 360 degrees about the shaft. A bolt to the base connects the second part that provides leverage and this rotates about the bolt to either a position that is parallel to the main part or at a point that is 43 degrees at an angle to the main part (Figure 1).
the points of the dominant tool. i.e. Player 1 uses a scissors and Player 2 uses a
= more stress on soft tissue (connective tissue under the skin that wraps and joins the muscles, bones, nerves, and blood
...nd pliers (Electrician 621.319). Once all the wiring is connected to lights and outlets, they use a circuit tester. The circuit tester measures voltages and presence of electricity (electrician). Power tools are also very handy tools for construction and maintenance electricians; they use tools such as saws and drills. They mostly use tools that would help them get the job done faster and pull a wire quickly through a conduit (electrician). Line workers use bigger tools and big machines to get their job done. Cranes and hoists are often use by line workers to set up the utility poles (electrician). They may also use remote control robots to reduce the dangers of the high voltage wires (electrician). Hot sticks, long tools use to protect them from electrical currents, they make sure they are using insulated tools and wearing insulated gloves (electrician).
...rved away from any contact surface. The forearm is shaped liked this for the wrist to remain free of surface pressure. Avoid restricting circulation - For many people there are exposed blood vessels near the skin at the wrist, which is where the pulse is often taken.
Water and well pumps are utilized to draw water from a profundity where the water table is a few feet underneath the range of provision. Regularly utilized for water conveyance. Hand pumps are physically worked pumps; they utilize human force and mechanical playing point to move liquids or air starting with one spot then onto the next. They are broadly utilized as a part of each nation on the planet for a mixture of mechanical, marine, watering system and recreation exercises. There are numerous distinctive sorts of hand pump accessible, fundamentally working on a cylinder, stomach or turning vane guideline with a check valve on the section and passageway ports to the chamber working in restricting bearings. Most hand pumps have plungers or responding cylinders, and are sure relocation.
...s tools. I believe it is nearly impossible for issues of excessive force to be completely eliminated. But with more training this problem can be alleviated.
the blade, which is a knife being held close to a person who if he