The present invention relates generally to construction safety tools. Particularly, the present invention relates to devices for preventing dropped object accidents on construction sites from increased heights.
It is a generally accepted safety practice to secure a workman's tools in some manner when working from a ladder or above ground level. Over the years, different types of devices for preventing the accidental dropping and/or loss of a tool and a tool accessory have been attempted when working in overhead situations. A dropped tool or tool accessory could be hazardous for personnel working below or the dropped tool or tool accessory could potentially damage a vital piece of equipment. This can occur when the tool is mishandled, bumped, or jarred; the tool then becoming dislodged from the user's hand and free to fall to whatever is beneath the worker. In some cases, this can be a passerby, another worker or even vital plant equipment.
Typically, the tools are secured to the worker with a tether or in a holster of some sort. Generally, tethers are lightweight, optionally retractable, and have light duty snap hooks at each end for snap connection to the tool and to the worker's belt or harness. Some such tethers even use plastic snaps. In some cases, a loop is formed around the worker's wrist with the free end having a snap connectable to a tool. Others have disclosed the use of a hook and loop type fastener to secure the tool to the worker's hand. The use of such safety tethers and lanyards is becoming increasingly necessary, especially in industrial centers where workers are constantly exposed to the hazards of falling tools, sometimes from many feet.
Many attempts have been made to secure tools to tethers and users. Some are successful and easy to use while others are makeshift and lack the quality needed to sustain heavier tools. Devices have been created to allow for lanyard attachment to hand tools. Some devices include using eye hooks, or D-rings with webbing secured by tape or heat shrink tubing. Other devices are tubular and used over the butt end of screw drivers and other tools with handles such as, for example, pliers, hammers, cutters, etc. These tubular devices are normally heat shrinkable onto the tool or are self-insertable device made of a resilient material that provides a suction force when the tool handle or butt end is inserted into the tubular device. The suction force created upon insertion of the tool into the tubular device prevents the tool from being easily pulled out or separated from the tubular device.
One such device is a bracelet type tool drop preventing device disclosed in Japanese Patent Application JP08-108538 and published as JP09-272077. Drawing 5 of the Japanese patent application discloses a screwdriver with a rotary ring that is attached to the screwdriver using a rubber stopper.
The significance of such events cannot be overstated. On the worker side, an injury caused by a dropped object occurs every 10 minutes in the United States. That represents more than 50,000 dropped object accidents every year. In the kitchen, the injury may be minimal, but on a construction site, the impact is much more severe. Just one dropped object accident can take a life and bankrupt your business. According to the National Safety Council, one employee death costs more than 1.4 million dollars.
Despite the very real and present danger that dropped object accidents present to both the business owner and the worker, the industry has failed to provide technology which meets the current demands of the market. The present invention stops dropped object accidents in their tracks with comprehensive dropped object prevention tools, and training, designed for real world work-place challenges.
The present invention employs a revolutionary system used to capture tools and objects when working at heights. The system is designed to capture tools at all times (including during tool transfers) and reduce the risk of tools being dropped on people or property below. The present system when used correctly, allows workers to safely and securely carry and use tools at heights and manage tools effectively. Specifically, the present invention was designed for working on the opposite side of a handrail. The catch basket is placed under the drop hazard that is being worked on so as to capture objects that may drop inadvertently.
In addition to the main basket, the present invention also contains some features to prevent drop hazards. One such feature are the ready anchor points by which tethers may be attached. Another feature to increase overall safety is a 360-degree trough which circumvents the main basket (regardless of basket shape). By surrounding the basket, the trough is capable of containing the parts if inadvertently angled while removing.
In some embodiments, the catch basket also has stabilizer brackets that will hold onto a handrail and keep it from tipping on one direction and an additional handle 2″×1″ which facilitates preventing the basket from tipping in the other direction. This set up will allow the basket holder to stand on the right side of the worker or the left side of the worker due to its concentric design.
In yet another embodiment, the base is a strainer which allows water to run through to keep the parts wet which helps reduce radioactive contamination from spreading.
As described above, in one embodiment, the present invention is a handrail catch basket supported by a handrail for containing tools and attaching safety tethers for further tools. The basket has a base with a side wall extending from a bottom sheet, and an upper rim extending from the side wall. The base defines an internal chamber and trough for catching tools which are and are not attached via safety tethers.
The basket has a brace which provides additional support along the upper rim. The brace has two arms extending from a main portion at an angle. Each of the two arms abut a respective portion of the side wall of the base and are supported on a respective portion of the rim portion of the base.
The basket has at least two points of support which engage the handrail, and each are capable of physically supporting the entire weight of the basket and several tools. One such point of support is a stabilizing bracket which has a supporting arm, securely supporting the base, and a main body extending between the supporting arm and a retaining arm. Together, the main body and the retaining arm define a railing-space under the bracket. Respective under-surfaces of the main body and the retaining arm which face the railing-space are as close to friction-free as possible so as to facilitate the basket in being able slide freely side-to-side along the handrail.
In one embodiment a second of the at least two points of support is a handle. The handle has a neck which is attached to and securely supports the base. A shaft of the handle extends between the neck and a grip. The grip capable of being supported by hand or by attachment via attachment point, such as a u-shackle, located along the grip.
The preferred embodiment of the present invention is illustrated in
Base
Although shown generally in
The strainer is about 0.05 inches thick in this embodiment, so that each of the top walls 116, sidewalls 112, and bottom wall 114 are also about 0.05 inches thick. The sidewalls 112 of the strainer 110 are approximately 2.14 inches tall, extending from the bend 113 adjacent the bottom wall 114 to the bend 113 adjacent the top wall 116; and are approximately 10.14 inches long, extending between the vertices 115 along adjacent side walls 112. Similarly, the top walls 116 are also approximately 10.14 inches long, if one includes the length of the overlapping portions 117. The width (or length, depending upon perspective) of the overlapping portions 117 will be relative to the width of the top wall 116, in this embodiment, approximately 1.05 inches.
Anchors and Tethers
Tethering anchors 102, illustrated in
First anchor opening 104 has a diameter 104D (or cross-sectional area) larger than a diameter 142D (or cross-sectional area for noncircular apertures) of the fastener aperture 142. The increased size between these two cross-sectional areas facilitates secure attachment of the anchor 102 to the basket base 110 while also enabling free rotation of any tethers 12 attached to the first anchor opening 104.
The second anchor opening 142 (or fastener aperture 142) is spaced slightly from the second anchor end 105 providing a retaining edge to provide additional structural support for engaging the fastener 142 of the basket 100.
The size of the first anchor opening 104 to second anchor opening 143 is dependent on the diameter of the size of the tether clips and fasteners 142 employed. Although tethering anchor 102 shown in
Although the tether 12 shown in
Trough
Best use of the trough 120 is illustrated in
That is, without the trough 120, the chamber 152 would have the same perimeter size as the inlet 150, and if the basket 100 was shifted so that the bottom 114 of the base was no longer horizontal, then the center of gravity of an object or tool 12 within the basket could cause gravity to act upon any tools 12 within the basket 100, tipping them out of the basket 100 without additional inertia or external force.
The width of the top wall 116 inevitably determines the width of the trough 120, an additional partially enclosed space encompassing the perimeter of the main basket inlet 150. For a rectangular shaped basket then, the volume of the trough 120 will likewise approach four times the width of the top wall 116 times the height of the sidewall 112. In another embodiment, where the base 10 lacks an upper lip 116, the size of the trough 120 would depend upon the size of the bottom wall 134 of the ledge 130 accordingly.
It is to be recognized that the concept of the trough 120 is to be employed for bases 110 of the present invention of other shapes as well. The trough 120 provides extra protection against drop spills by surrounding the chamber 152 of the basket 100 in all 360-degrees of a center of the chamber 152. That is, the trough 120 surrounds the chamber 152 regardless of basket shape—in the embodiment shown in the figures, the base is rectangular so that the trough extends in a rectangular fashion. If the main base was a columnar shape, the trough 120 would extend 360-degrees in a tubular fashion around the base 110.
Ledge
One embodiment of the ledge is illustrated in
In some embodiments the side walls 132 of the ledge 130 are straight lines, so the size of the inlet will remain constant as it transitions into the main chamber 152. In other embodiments, the sidewall 132 are angled outwards to provide a wider inlet than the main chamber 152 size, in order to provide a funnel shape to encourage tool entrance into the main chamber 152. In other embodiments, the sidewalls 132 are angled inwards to provide a narrower inlet than the main chamber 152 size, in order to increase the overall trough 120 size.
With regard to overall structure, in some embodiments the ledge has four components which each make up the ledge 139 as a whole. Each ledge component meets an adjacent ledge component along vertices 135 which are cut at 45-degree angles so as to complement the adjacent vertex of a respective ledge component. Angled braces 180 with smaller arms 184 are provided for these embodiments to provide further security and support. In other embodiments, there is a single ledge with overlapping portions having structures similar to the overlapping sections 117 in various embodiments of the strainer top walls 116.
Fasteners
In the embodiment shown here, the fasteners 140 are reversed bolts, having the heads 144 on the inside of the chamber, and the shafts 148 and bolts 148 visible on the outside or outside of the basket 100. However, any fastener 140 capable of illustrating and/or warning against potential disengagement is within the scope of the present invention. Cap screws with tie wires or other irreversible fasteners 140 are also within the scope of the present invention.
Inlet
The inlet 150, in the embodiment shown in
In alternative embodiments, the inlet is formed by an extension of the base and this structure is contrary to the scope of the invention. In these alternative embodiments, if the size of the inlet may remain constant as it transitions into the main chamber 152. In other embodiments, the structure forming the inlet is angled outwards to provide a wider inlet than the main chamber 152 size, in order to provide a funnel shape to encourage tool 14 entrance into the main chamber 152. In other embodiments, the structure forming the inlet 150 forms the trough 120 as well, and thus, directly impacts the size of the trough 120. The inlets 150 in these embodiments must, then, have a much smaller size than a size of the main chamber 152, in order to increase the overall size of the trough 120 with respect to the main chamber 152.
Brackets
Along the same lines, instead of merely providing a single stabilizing bracket along either side of the handle, the present invention also anticipates embodiments having a set of stabilizing brackets with clamps so that the basket is self-supporting. That is, the railing-space 165 under the bracket 160 has a size which is defined by the retaining portion 162 and the main portion 164. In the embodiment shown in
Handle
As shown in
The main shaft 176 of the handle extends from the neck 175 away from the base 110 towards a grip 178. The grip 178 may be formed of an extra material wrapped around the shaft of the handle, or simple a portion of the shaft of the handle itself.
A U-shackle extends vertically through an end of the shaft 176 adjacent to or within the grip 178. The U-shackle 179 is generally of sufficient strength, such that if correctly attached by a user to a third attachment point, the basket 100 may be supported securely upon the railing without additional user support.
Brace
Braces, according to the present invention, are illustrated in
For each type of brace 180, 180′, the arms 182, 184 extend apart from one another at an angle 188 which complements the vertices of the strainer 110. The arms 182, 184 may end in either a diagonal or rectangular form as they extend from the main body 186. Regardless of the end shape however, each brace 180, 180′ will typically have at least one fastener aperture 142 per arm 182, 184. In the larger brace 180, the arms 182 have two fastener apertures 142 each, and the main body 188 has two additional fastener apertures 142 for securing the handle 170 thereto.
The following reference numbers are adhered to within the specification to refer to those referenced elements within the drawings of the present application.
Although the preferred embodiments of the present invention have been described herein, the above description is merely illustrative. Further modification of the invention herein disclosed will occur to those skilled in the respective arts and all such modifications are deemed to be within the scope of the invention as defined by the appended claims.