Patent Application
20120298565
The present invention relates to a machine and a process for sorting fasteners and, in particular, to a machine and a process for sorting fasteners that have a shaft with a head from fasteners that only have a shaft.
The use of fasteners such as rivets is a common manufacturing and industrial practice for joining at least two components together. A rivet is typically known as a permanent mechanical fastener that has a generally smooth cylindrical shaft, also known as a shank, with a head on one end. A blind rivet, also known as a pop rivet, typically has a tubular head with a mandrel in the form of a shaft through the center thereof. Such a rivet is typically inserted into a hole that has been drilled through the components to be joined and a rivet tool is used to draw the mandrel into and thereby expand the head. In addition, the mandrel snaps off and falls away from the expanded head.
During the use of pop rivets, it is not uncommon for unused rivets having a shaft with a head to become mixed with used rivets that simply have a shaft. In addition, sorting of the used rivets from the unused rivets by hand can be a time-consuming job. In the alternative, throwing away unused rivets results in undesired waste. As such, a rivet sorting device or machine and a process thereof that can sort fasteners that have a shaft and a head from fasteners that only have a shaft would be desirable.
A machine for sorting fasteners that have a shaft with a head attached thereto from fasteners that only have a shaft is provided. The machine can have a plurality of rollers that are rotatably attached to a frame, the plurality of rollers having a gap between each other and generally aligned parallel to each other. The gap between each roller is dimensioned such that the shaft of a fastener can fit or fall therethrough and yet prevent the head of the fastener to fit or fall therethrough. In addition, the plurality of rollers can be oriented lengthwise at an angle relative to horizontal and thus have an elevated end and an exit end. In some instances, the machine can include an opening proximate the exit end of the rollers, the opening dimensioned for the head of the fastener to fit or fall therethrough.
The plurality of rollers can afford for sorting a plurality of fasteners by placing the fasteners onto the rollers proximate the elevated end and rotating the rollers, rotation of the rollers affording the fasteners to move from the elevated end towards the exit end. The gap between, and rotation of, the rollers also affords for the fasteners having only a shaft to fall between the rollers before reaching the exit end, and the fasteners having a shaft with a head not falling between the rollers, reaching the opening and falling therethrough. In some instances, a motor can be included and engaged with the plurality of rollers, the motor operable to rotate the plurality of rollers in a clockwise direction, a counterclockwise direction, and combinations thereof.
The fastener sorting machine can include a hopper that is located above the plurality of rollers and dimensioned for a plurality of fasteners to be placed therewithin. It is appreciated that the hopper can direct the plurality of fasteners to the plurality of rollers. In addition, the hopper can have at least one divider that can divide the plurality of fasteners between or among the plurality of rollers. The fastener sorting machine can also have a bin located below the plurality of rollers and used for collecting the fasteners that only have a shaft and fall between the rollers and for collecting the fasteners that have a shaft with a head and fall through the opening that is proximate the exit end of the rollers.
A process for sorting fasteners includes providing a fastener sorting machine as described above and providing a mixture of fasteners that have a shaft and a head and fasteners that have only a shaft. Thereafter, the mixture of fasteners is placed onto the plurality of rollers proximate the elevated end and the rollers are rotated. While the rollers are rotated, the mixture of fasteners moves down the rollers from proximate the elevated end towards the exit end with fasteners having only a shaft falling through the gap between the rollers before reaching the exit end. In contrast, the fasteners having a shaft with a head reach and fall through the opening proximate the exit end. It is appreciated that the head prevents such fasteners from falling through the gaps between the rollers.
The present invention provides a machine and a process for sorting mechanical fasteners that have a shaft with a head from fasteners that simply have a shaft. As such, the present invention has utility as a machine for sorting fasteners.
The fastener sorting machine can include a plurality of rollers that are aligned along a generally single plane relative to each other, have a gap in between each other, and are inclined lengthwise at an angle relative to horizontal. The gap between each of the rollers is dimensioned such that a shaft of a fastener to be sorted can fit and fall therethrough. However, the gap is also dimensioned such that a head of a fastener to be sorted cannot fall therethrough.
The plurality of rollers have an elevated end which is naturally higher than an opposing exit end, and when the rollers are rotated, fasteners that are placed onto the rollers proximate the elevated end move in a direction towards the exit end. In addition, fasteners that have only a shaft, and do not have a head, fall through the rollers before reaching the exit end. Proximate to the exit end can be an opening dimensioned such that the head of the fastener can fall therethrough. As such, as the fasteners that have a shaft with a head reach the opening, such fasteners fall through the opening at a desired location. In this manner, fasteners that only have a shaft fall between the rollers at a desired location and fasteners that have a shaft with a head fall from the rollers at a different and desired location.
A hopper can be used to supply the fasteners to a region proximate to the elevated end of the rollers and the hopper may or may not have one or more dividers that aid in separating or dividing the fasteners among the gaps and/or plurality of rollers.
Turning now to
The plurality of rollers 110 can be generally parallel to each other as shown in
For example and for illustrative purposes only, a plurality of fasteners 130 having a shaft 132 with a head 134 attached thereto and a plurality of fasteners 140 that simply have a shaft 142 can be placed onto the plurality of rollers 110 proximate to the elevated end 112. Upon rotation of the rollers 110, and with the aid of gravity, the fasteners arranged themselves such that the shaft 132 of fastener 130 and the shaft 142 of the fastener 140 fit and are located between adjacent rollers 110. In addition, fasteners 140 having only a shaft 142 fall between the rollers 110 through the gap 116 while the head 134 of the fastener 130 prevents the fastener 130 from falling between the rollers 110. With the rollers inclined at an angle θ from horizontal, and in combination with rotation of the rollers 110, the fasteners 130 move in a direction towards the exit end 114. Proximate to the exit end 114 can be an opening 118 that is dimensioned such that the head 134 can fit therethrough. As such, upon reaching the opening 118, the fastener 130 can fall from the rollers, for example into the bin 300.
Although the opening 118 is shown as a gap between the exit end 114 of the rollers 110 and the frame 120, the opening 118 can be any opening that is dimensioned such that the head 134 of the fastener 130 can fit and fall therethrough. For example, the rollers 110 themselves can be shaped such that at a desired location proximate to the exit end 114 the opening 118 is present and the fasteners 130 can fall therethrough.
The hopper 200 can be located proximate to the elevated end 112 of the plurality of rollers and have a pair of side walls 210, a first end wall 220, and a second end wall 230. The side walls 210 can be inclined towards the rollers 110, as can be the first end wall 220, such that fasteners placed or poured into the hopper 200 are directed towards the rollers 110. In addition, one or more dividers 240 and/or 242 can be included with the hopper 200, the dividers 240 and 242 having different lengths and heights such that desired separation or division of the plurality of fasteners between the rollers 110 and thus gaps 116 is provided.
Turning now to
For example,
In some instances, the gap 116 between the rollers 110 can be adjusted such that a single sorting machine can be used for different sized rivets. One embodiment of such a sorting machine is shown in
Rotation of the rod 126 in a clockwise or counterclockwise direction as illustrated by arrow 1, for example using a knob or handle 129, can bring opposing ends of the two scissor links 125 and/or attachment points 127 and 128 closer together or spread them further apart as illustrated by arrows 2. It is appreciated that the movement of the opposing ends of the two scissor links 125 produces an accordion effect on the scissors linkage 124 and thus moves the attached rollers 110 either further apart or closer together as illustrated by dimensions D1 and D2 in the figures. It is also appreciated that the shafts 122 of the rollers 110 can extend through to the frame 120 using one or more slots (not shown) that afford for the rollers 110 and shafts 122 to move relative to the frame 120 when the gap 116 between the rollers 110 is being adjusted.
Other methods, devices, etc., can also be used to move the rollers 110. For example, a mechanical, hydraulic, electric, and/or pneumatic powered system can be used to rotate the adjustment rod 127 and/or move the scissor links 125. In the alternative, the individual rollers 110 can be moved by hand within a slot (not shown) in the frame 120. As such,
In operation, and for example and illustrative purposes only, a plurality of rivets containing unused rivets that have a shaft with a head and used rivets that have only a shaft are collected and placed into the hopper 200. The hopper 200 directs the mixture of rivets towards and onto the plurality of rollers 110 which are rotated, for example using the drive system 400. Upon reaching the plurality of rollers 110, the rotation and angled orientation of the rollers 110 affords the rivets to be arranged and aligned such that the shafts of the unused rivets and the used rivets extend between the rollers 110 and through the gaps 116.
The shafts of the used rivets that have no head fall through the gaps 116 and into a bin 300 having a first portion 310 to accept and collect used rivets. However, the heads of the unused rivets do not fit through the gaps 116 and as such cannot fall between the rollers 110. In addition, the angle of the rollers 110, in combination with the rollers 110 being rotated, affords for the unused rivets to move towards the exit end 114. Upon reaching the opening 118, the heads of the unused rivets can fit therethrough and thus fall from the rollers 110, for example into a second region 320 of the bin 300 which is used to collect unused rivets. In this manner, the unused rivets can be conveniently and time efficiently separated from used rivets, not thrown away as waste, and returned to a manufacturing job station.
The various components, parts, and the like of the fastener sorting machine, hopper, bin, and drive system can be made from any material known to those skilled in the art, illustratively including metals, alloys, ceramics, polymers, wood, and the like. In addition, it is understood that various modifications are readily made to the embodiment(s) of the present invention described herein without departing from the scope and spirit thereof. Accordingly, it is understood that the invention is not to be limited by the specific illustrated embodiment(s), but by the scope of the claims.
