PROTECTIVE DEVICE FOR USE IN WELDING
A protective device for use in welding, optionally in combination with a welding glove in order to simplify welding through improved ergonomics and improved weather protection, having a first opening (6) at one end for introduction of part of an electrode holder (1) or a welding gun (3) and a second opening (10) at its opposite end for introduction of a hand holding the electrode holder/welding gun (1; 3) and accompanying cable. The protective device has a substantially cylindrical shape and is designed to surround the handle of the welding gun (3) or the handle of the electrode holder (1), part of a user's forearm and part of the cable (2; 4), whereby the weight of the cable (2; 4) thanks to the cylindrical form of the protective device will be taken up by the lower part of the protective device and transferred to the upper side of the hand, the wrist and the forearm, and in that the first opening (6) is designed to be adaptable to differently sized electrode holders and welding guns, respectively, to surround them in a sealing fashion.
The present invention relates to a protective device for use in welding, optionally in combination with a conventional welding glove, in order to facilitate the welding through improved ergonomics and improved weather protection.
PRIOR ARTDuring work in winter conditions, wind, wetness, and cold will make it impossible for welders to work continually, since they will have to pause in order to regain sensation in their hands, especially the hand that holds the welding tool. While welding thick plate constructions (ships etc.) extreme heat makes it necessary to pause so as not to damage the welder's hand
During all welding, good dexterity is crucial—the thicker the glove is, the more restricted is dexterity. The thicker the glove is, the material is in the way when the electrode holder is held, leading to the necessity of a more open hand grip—which in itself is tiring. In addition to that, thicker gloves are stiffer, which increases the effort necessary to close the hand around a tool. The thicker the material, which is to be sewn, the more difficult it is to sew the glove so that the hand is comfortable. A glove cannot be made too thick in between the fingers, because then the fingers would be spread to much.
If instead welding mittens are used, other problems arise: the glove has to be taken on and off when the electrode is replaced, or when using an angle grinder or a chipping hammer. Welding mittens are also thick, and the same problem of closing and opening the hand makes it tiring to use welding mittens.
Inadequate protection against cold and heat leads to rheumatic and other joint-related hand ailments, and early retirement due to hand injury is not uncommon.
There are therefore requirements for protection against cold, wind, wetness, heat, welding spatter, cut- and puncture wounds, as well as a conflicting requirement for dexterity. All of these requirements are measured in order to comply with norms used for certification of welding gloves.
SUMMARY OF THE INVENTIONThe goal of the present invention is to provide a protective device for use in welding, optionally in combination with a welding glove, which facilitates welding through improved ergonomics and improved protection against weather, which in turn improves the working conditions for welders and thus fewer injuries, better welding results and a higher productivity.
This goal is achieved with the protective device according to the invention which is characterized by the features described in claim 1. Further developments and preferred embodiments of the invention are specified in the subsequent claims.
The invention therefore entails that the protective device is separated from the welding glove, the latter which is worn directly on the hand. Consequently, the protective device can be produced from more durable and protective materials than what is practically possible for a glove or mitten. When performing work which requires better fine motor skill, such as using a chipping hammer, using an angle grinder, or replacing electrodes etc. the welder puts away the welding tool, performs the task, and puts back the glove-clad hand in the protective device and grasps the handle of the electrode holder or the welding gun so as to resume welding.
By designing the protective device so that it supports the weight of the cable or electrode feeder, the welding hand is relieved since the weight of the cable or electrode feeder is spread out over the back of the hand, wrist, forearm and is thus moved closer to the body, instead of the whole weight being carried by closed fingers, so that welding can be done with more relaxed fingers. In this way, constant pressure must not be exerted by the hand, which would lead to poor blood flow and thus decreased hand function.
Since an improved protection against heat or cold is achieved the welder can work for longer periods without interruption, with subsequent higher efficiency combined with better ergonomics.
Several benefits are achieved through the shape of the protective device. Depending on the chosen material, it can be manufactured from a single piece, which is fashioned into the desired form by the use of adequately placed seams. Alternatively, it can be made of two or more pieces of material, depending on the stiffness and thickness of the chosen material. The cut is simple, material waste is small and normally only a few seams are required. It insulates all around the top of the handle of the electrode holder or welding gun. Since the hand is inside and is completely surrounded by the protective device, reflective, thick and rigid materials can be used because it does not need to bend when the hand is closed or opened.
By designing the protective device so that the hand opening has a stiffener, it is easy to pick up or put away.
In order to improve the weather protection and to prevent wind, snow or moisture from entering, the protective device may be fitted with a drawstring and an elastic wind/snow lock. Furthermore, a cuff or similar can be fitted to the hand opening in order to hold the protective device on the welder's arm.
In a further development of the invention, the lower part of the hand opening can be equipped with a layer of rubber-coated fabric or equivalent arranged orthogonal to the longitudinal axis of the protective device in which there is a slit so that the cable can be wedged in, which prevents the protective device from rolling or slipping down, which otherwise could be a problem, especially when welding downwards.
In order to further improve the fit around the electrode holder or welding gun, and prevent moisture from creeping into the protective device the opening can equipped with a tab which is closed with a hook-and-loop fastener.
The area near the opening of the protective device close to the electrode holder or welding gun should be designed as a tapered cone, which can be cut to a desired opening size. This makes it possible to adjust the protective device to a welding gun (in which case the opening should be narrow) or to the maximum sized electrode holder, so that the actual welding tool in all cases fits the protective device.
The frontal opening of the protective device is preferably sewn with seams arranged in a back-to-front reversing pattern so that the seams interlock each other, so that the seam can not unravel when a piece of the material is cut off. The seam is first directed forwards, then backwards, then forward again and so on. In this way, the seam in its unbroken state is interlocked in several places. Therefore, the seam does not unravel further than to the next interlocking when the opening is cut to desired aperture size. The sewing pattern can also be laid out with separate seams which are sewn forward to the correct length and then backwards to interlock itself, and the next seam overlapping the previous while extending somewhat longer after which it goes backward for self-interlocking, and so on.
In order to make it possible to extend fingers from the protective device without letting go of the welding tool, an overlapping frontal part of the protective device can be included, while at the same time maintaining protection against heat, wind, rain and cold.
The invention will now be described in further detail with reference to embodiments of the invention shown on the attached drawings, in which:
The invention will now be described in detail with reference to the accompanying drawings which schematically show a number of possible embodiments of the protective device. Similar reference numbers indicate similar parts throughout the several views of the drawings.
Furthermore, it should be noted that the invention is equally suitable for a clamp electrode holder as well as for use with, or without, other types of tools and machinery that require enhanced protection, or where it is desirable.
The protective device according to the invention is intended to be used in combination with a conventional welding glove 5. Since the protective device is not intended to be bent or tightly compressed by a hand which holds a handle, a material of suitable thickness and desired protective properties can be selected for the protective device, without having to compromise those qualities unduly for necessary flexibility.
The protective device also exhibits a second opening 10 at its opposite end. This opening 10 is wide, in order to allow the introduction of an electrode holder or welding gun which is held by a glove-clad hand. Also in this opening there is a tightening device as schematically indicated by a drawstring 11 and a circumferential string 12 illustrated as a dotted line. When worn, the protective device will thereby have a substantially reduced opening size, which causes the cable 2 to be closer to the arm creating a more comfortable angle of the handle without the hand being further stressed.
Furthermore, a stiffener 13 can be fitted around the second opening in order to make it more convenient to put down the protective device and then pick it up again, even when an electrode holder or a welding gun is still positioned so as to extend through the first opening
Alternatively, or in addition to the above, push buttons 14 or equivalent fasteners can be affixed to sides of the protective device. With the aid of those, the aforementioned sides can be held together so that the protective device is kept in the same position relative to the arm, while the cable is held in a thus formed lower opening.
When the protective device is worn, the cable 2 of the electrode holder or the cable 4 of the welding gun 3 will be supported by the lower part of the protective device thanks to ite substantially cylindrical form. The weight is transferred to the upper part of the hand, wrist and forearm closer to the body, decreasing load on the hand so that it does not need to hold the handle tightly in order to carry the entire weight of the cable.
In
In order to improve the function of the protective device it is according to a preferred embodiment of the invention fitted with parts intended to affix it to a user's arm.
The protective device can also be locked to the welder's clothes with a clip. Such a clip can be sewn in, or be a separate item.
As is shown in
In the preceding description, the fastening devices are described as hook-and-loop fasteners. These may of course be replaced by other suitable attachment elements, such as snap buttons. These should be made of plastic or other non-conductive material.
Claims
1. (canceled)
2. (canceled)
3. (canceled)
4. (canceled)
5. (canceled)
6. (canceled)
7. (canceled)
8. (canceled)
9. (canceled)
10. (canceled)
11. (canceled)
12. (canceled)
13. (canceled)
14. (canceled)
15. (canceled)
16. A protective device for use in welding, optionally in combination with a welding glove, comprising:
- a first opening at a first end of said protective device to allow passage of a welding tool from inside said protective device to outside said protective device;
- a second opening at a second end that is opposite to said first end for introduction of a hand holding the welding tool and accompanying cable of the welding tool;
- said protective device having a substantially cylindrical shape with a cavity between said first opening and said second opening to surround the welding tool, a user's hand, wrist and forearm and part of the cable of the welding tool, whereby weight of the cable is supported by a lower part of said protective device so that the weight of the cable is transferred to an upper side of the hand, the wrist and forearm due said cylindrical form of said protective device; and said first opening being adjustable to seal around differently sized welding tools.
17. The protective device of claim 16, wherein said protective device is manufactured of a material to protect the user from dangers of welding and weather conditions
18. The protective device of 16, wherein said protective device tapers at said first end into a conical shape towards said first opening to allow said first opening to be adjustable.
19. The protective device of 18, wherein said first end is sewn with interlocking seams running back-and-forth along said conical shape so that said taper at said first end near said first opening can be cut to a desired opening size to be adjusted to the welding tool and thereby form a closure around the welding tool without risk of remaining stitches unravelling.
20. The protective device of claim 16, further including a tightening device near said first opening such that said first opening is adjustable for welding tools of differing sizes by tightening said first opening.
21. The protective device of claim 16, further including a tightening device near said second opening such that said protective device is adjustable about the forearm of the user to fasten the protective device around the forearm of the user.
22. The protective device of claim 16, further including a cuff at said second end of said protective device, said cuff adapted to wrap about the forearm of the user to fasten the protective device to the forearm of the user.
23. The protective device of claim 16, further including a stiffener surrounding said second opening to maintain said second opening in an open configuration.
24. The protective device of claim 16, further including an insert of a supple material affixed in said second opening, said insert including a slit into which the cable of the welding tool can be wedged, so that the cable is prevented from slipping within said protective device.
25. The protective device of claim 21, wherein said tightening device near said second opening is a drawstring and a band arranged in a channel surrounding said second opening.
26. The protective device of claim 21, wherein said tightening device near said second opening is at least one set of snap fasteners in said protective device so that sides of said protective device can be held together below the forearm of the user.
27. The protective device of claim 16, further including an opening having overlapping frontal part to allow extension of one or more fingers of the hand of the user at the same time as the hand is holding the welding tool.
28. The protective device of claim 16, further including a slit with a closable flap along a lower side of said protective device.
29. The protective device of claim 22, wherein said cuff is affixed to said protective device such that when said cuff is tightened around the forearm, and wherein size of said second opening is not affected.
30. The protective device of claim 22, wherein said cuff is partitioned into two parts and said cuff includes a hook-and-loop fastener to affixed said cuff to the forearm.
31. The protective device of claim 22, wherein said cuff is cylindrical and includes a hook-and-loop fastener to tension said cuff and affixed said cuff on the forearm by a folding action.
32. The protective device of claim 16, further including a strap positioned around said first opening to facilitate tightening of said first opening around the welding tool.
33. The protective device of claim 16, further including a third opening on a lower side of said protective device between said first opening and said second opening to allow the cable pass through said the protective device and further including a sealable partition along said lower side from said second opening to said third opening.
34. The protective device of claim 16, wherein said protective device is comprised of an upper part and a lower part connected together.
Type: Application
Filed: Dec 1, 2010
Publication Date: Sep 27, 2012
Inventor: Michael Gustafsson (Tumba)
Application Number: 13/513,324