This invention relates generally to furniture and, more specifically, to chair-desks and chair-desk frames.
Chair-desks, wherein a desk top and a seating surface are combined in a single, integral unit, have long been in common use as student desks in classroom environments. Typically, chair-desks comprise a tubular frame having a forward portion and a rearward portion. The forward portion defines a pair of front legs and a desk top support structure. The rearward portion comprises a pair of rear legs and a seat support structure. The forward portion and the rearward portion are typically connected to one another by one or more connecting elements.
Chair-desks are very awkward to store and to ship because of their large overall volume and irregular shape. Consequently, the cost to the manufacturer to store and ship chair-desks and the cost to the consumer (typically a school district) to store chair-desks is very large. Accordingly, there is a long-felt need in the industry for a method for shipping and storing chair-desks which would greatly reduce costs.
The invention satisfies this need. The invention is a stackable chair-desk frame and a method for moving a plurality of chair-desk frames.
In one embodiment, the chair-desk frame comprises (a) a forward portion having a desk top support structure and a pair of front legs, the pair of front legs defining a front leg base connection line extending between the midpoints of the pair of front legs at the base elevation; and (b) a rearward portion attached to the forward portion, the rearward portion having a seat support structure and a pair of rear legs, the pair of rear legs defining a rear leg base connection line extending between the center lines of the pair of rear legs at the base elevation; wherein the chair-desk frame defines (i) a base center line extending between the midpoints of the front leg base connection line and the rear leg base connection line, and (ii) a central base point at the midpoint of the base center line; and wherein the chair-desk frame further comprises at least three upper stacking contact points and at least three lower stacking contact points, all of which are disposed so that a plurality of identical chair-desk frames can be vertically stacked one on top of the other such that (i) the base elevations of each chair-desk in the stack is separated from the base elevation of an adjacent chair-desk by less than 45% of the maximum elevation, and (ii) the locations of all central base points in the stacks fall along a generally vertical line which deviates from the vertical in a forward direction by less than 30°, in a direction towards either side by less than 10° and in a rearward direction by less than 30°.
In a second embodiment, the chair-desk frame comprises (a) a forward portion having a pair of front legs and a desk top support structure, the pair of front legs comprising a first side front leg and a second side front leg, the second side front leg having a distal-most surface; (b) a rearward portion having a pair of rear legs and a seat support structure; (c) a connecting element for connecting the forward portion to the rearward portion, the connecting element having a distal-most surface, the distal-most surface of the connecting element and the distal-most surface of the second side front leg defining a tangential plane; and (d) a side brace connecting the second side front leg to the connecting element, the side brace being disposed along or outwardly of the tangential plane; wherein the chair-desk frame is capable of stacking with identical chair-desk frames to form a generally vertical chair-desk frame stack comprising at least three identical chair-desk frames.
In yet another embodiment of the invention, the chair-desk frame comprises (a) a forward portion having a pair of front legs and a desk top support structure, the pair of front legs comprising a first side front leg and a second side front leg, the second side front leg having a distal-most surface; (b) a rearward portion having a pair of rear legs and a seat support structure, the pair of rear legs comprising a first side rear leg and a second side rear leg, the second side rear leg having an distal-most surface, the distal-most surface of the second side rear leg and the distal-most surface of the second side front leg defining a tangential plane; and (c) a side brace connecting the second side front leg to the second side rear leg, the side brace being disposed along or outwardly of the tangential plane; wherein the chair-desk frame is capable of stacking with identical chair-desk frames to form a generally vertical chair-desk frame stack comprising at least three identical chair-desk frames.
These and other features, aspects and advantages of the present invention will become better understood with reference to the following description, appended claims and accompanying drawings where:
The following discussion describes in detail one embodiment of the invention and several variations of that embodiment. This discussion should not be construed, however, as limiting the invention to those particular embodiments. Practitioners skilled in the art will recognize numerous other embodiments as well.
The invention is a stackable chair-desk frame 10 used in a chair-desk 12, such as illustrated in
One embodiment of the chair-desk frame 10 is illustrated in
As shown in the embodiments illustrated in the drawings, the front legs 32 extend slightly in a forwardly direction, although the front legs 32 can be vertical. Likewise, the rear legs 36 extend rearwardly. The rear legs 36 preferably extend rearwardly at a sufficient angle to make it difficult for a student to tip the chair-desk 12 backwards by leaning against the back of the seat 16. However, it is preferable that the rear legs 36 do not extend rearwardly to an excessive extent, thus to minimize the footprint of the chair-desk 12 and to minimize the danger of the rear legs 36 becoming a tripping hazard.
The chair-desk frame 10 has a first side 40 and a second side 42. The first side 40 is open so as to allow a user of the chair-desk 12 to have ingress and egress from the seat 16 of the chair-desk 12. The second side 42 of the chair-desk frame 10 is closed, as the ingress and egress is prevented by the connecting element 38.
As illustrated in
The chair-desk frame 10 can further comprise a seat 16 disposed on the seat support structure 34, such as illustrated in
In the embodiment illustrated in
In the embodiment illustrated in
The chair-desk frame 10 further comprises at least three upper stacking points 58a and at least three lower stacking points 58b. All of the stacking points 58 are disposed so that a plurality of identical chair-desk frames 10 can be vertically stacked one on top of the other, as illustrated in
The embodiment illustrated in
The embodiment illustrated in
In the embodiment illustrated in the drawings, the desk top support structure 30 has a generally U-shape with a pair of opposed side members 64 and a transverse member 66. The transverse member 66 is disposed proximate to the forward end 22 of the chair-desk frame 10. Those with skill in the art will recognize that the desk top support structure 30 can take on many other configurations.
In all configurations of the desk top support structure 30, it is important that there be sufficient space rearwardly of any rear-most transverse member in the desk top support structure 30 to allow identical chair-desk frames 10 to be stacked atop one another. Where chair-desk frames 10 are stacked such that vertical lines 67 drawn through each central base point 50 of adjacent chair-desks 12 are separated by a distance d, and wherein the forward-most member of the seat support structure 34 terminates in a first vertical plane 68 and the rearward-most transverse member of the desk-top support structure 34 terminates in a second vertical plane 70, the distance between the first vertical plane 68 and the second vertical plane 70 should be at least d+⅛ inch, preferably d+1 inch and most preferably d+4 inches. Where the chair-desk frames 10 include a seat 16 mounted atop the seat support structure 34, the first vertical plane 68 is defined at the forward-most edge of the seat 16. Thus, if a stack 92 of chair-desk frames 10 “grows” forward at a rate of 2 inches per chair-desk frame 10, the distance between the first vertical plane 68 and the second vertical plane 70 would be 2⅛inches, preferably 3 inches and most preferably 6 inches.
As is illustrated in the drawings, the stack stabilizer 80 can comprise a hook-shaped rearward end 84 which is sized and dimensioned to be retained by the desk top support structure 30 of the first chair-desk frame 10. The stack stabilizer 80 also has a forward 86 end which defines a groove 88. The groove 88 is sized and dimensioned to accept and retain the front leg transverse member 82 of the second chair-desk frame 10. The stack stabilizer 80 is typically made from a plastic or light metal alloy.
The stack stabilizer 80 is typically employed only during the stacking of chair-desk frames 10. After the chair-desk frames 10 are unstacked, the stack stabilizers 80 are recycled for use in the stacking of additional chair-desk frames 10.
The invention allows identical chair-desk frames 10 to be nested in any particular orientation. When nested in a vertical orientation, the nest 90 is termed herein a “stack” 92. The nest 90 can also be oriented in a generally horizontal direction or in any suitable angle between the horizontal and the vertical. Nests 90 of as few as two chair-desk frames 10 are possible, as are nests of 10 or more chair-desk frames 10.
The invention allows the manufacturer, shipper and end user to conveniently move nests 90 of chair-desk frames 10 by nesting the chair-desk frames 10 and then moving the nest 90 of chair-desk frames 10 from place to place. The amount of time, energy, space and manpower required to move a large quantity of chair-desk frames 10 is greatly reduced by the ability of the chair-desk frames 10 of the invention to nest with one another.
The advantages of being able to nest the chair-desk frames 10 result in greatly reduced shipping costs and storing costs to the manufacturer, storing costs to the distributor and storing costs to the end user. Also, large savings in handling costs to both the manufacturer and to the end user result from the ability to move large numbers of chair-desk frames 10 in a stacked or otherwise nested configuration.
Having thus described the invention, it should be apparent that numerous structural modifications and adaptations may be resorted to without departing from the scope and fair meaning of the instant invention as set forth hereinabove.