BACKGROUND
In an article of furniture, such as a sofa, loveseat, or chair among others, the decking provides a flexible surface that supports a seating surface, or in some instances, comprises the seating surface. The decking might be covered with one or more materials and cushions to provide a desired aesthetic and comfort level. Historically, a wire grid supported by a number of helical springs was used for decking materials. Furniture manufactures have since begun using elastomeric or other stretchable fabrics for decking instead of or in addition to wire grids and helical springs.
Fabric decking is typically stretched between a pair of opposing frame rails to provide the desired tension or stiffness in the decking Such a process currently has several drawbacks mainly dealing with the tools used. Currently, simple wide pliers are used to grip and stretch the material in a section or spot. The stretched material is then stapled in place. The problem stems from the repeated stretching, stapling and repeating needed in such a process. Not only is such a process time consuming, but it also results in an uneven tension applied across the decking, as the operator is unlikely to supply the same tension to each pull.
SUMMARY
Embodiments of the invention are defined by the claims below, not this summary. A high-level overview of various aspects of the invention are provided here for that reason, to provide an overview of the disclosure, and to introduce a selection of concepts that are further described in the Detailed-Description section below. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in isolation to determine the scope of the claimed subject matter. In brief and at a high level, this disclosure describes, among other things, apparatus and ways to tension and install a fabric decking into an article of furniture.
In an embodiment, a method and apparatus for applying tension to a fabric decking on an article of furniture are described. The apparatus includes a cylindrical base having a central axis and that is adapted to be placed in proximity to a frame of the article of furniture. A plurality of spaced needles are coupled to, and extend away from, said base. The needles are aligned in a row parallel to the axis of the cylindrical base. The needles extend away from the base a distance greater than a thickness of the fabric decking material. The apparatus also includes a rotation mechanism coupled to the base and operable to impart a rotational movement to the base about the axis, between a first, ready position for engagement with the fabric decking material, and a second stretched position.
DESCRIPTION OF THE DRAWINGS
Illustrative embodiments of the invention are described in detail below with reference to the attached drawing figures, and wherein:
FIG. 1 is a partial cut-away perspective view of a seating product in accordance with an embodiment of the invention;
FIG. 2 is a perspective view of a portion of the seating product of FIG. 1 in accordance with an embodiment of the invention;
FIG. 3 is a top plan view of a decking portion of the seating product of FIG. 1 in accordance with an embodiment of the invention;
FIG. 4 is a top plan view of a portion of a decking in accordance with an embodiment of the invention;
FIG. 5 is a perspective view of another seating product and an associated cushion in accordance with an embodiment of the invention;
FIG. 6 is a perspective view of a frame of an article of furniture with a helical spring decking in accordance with an embodiment of the invention;
FIG. 7 is a perspective view of a frame of an article of furniture with a fabric decking in accordance with an embodiment of the invention;
FIG. 8 is a perspective view depicting an elastomeric decking material attached to a pair of frame rails in accordance with an embodiment of the invention;
FIG. 9 is a perspective view of a frame of an article of furniture with an attached elastomeric decking depicted in accordance with an embodiment of the invention;
FIG. 10 is a top plan view of an apparatus for installing a fabric decking material in a frame of an article of furniture in accordance with an embodiment of the invention;
FIG. 11 is a top plan view of the apparatus of FIG. 10 with a frame of an article of furniture and an un-tensioned fabric decking section disposed thereon in accordance with an embodiment of the invention;
FIG. 12 is a top plan view of the apparatus of FIG. 11 with the fabric decking section tensioned and coupled to the frame in accordance with an embodiment of the invention;
FIG. 13 is an elevational view of the apparatus of FIG. 10 depicted along line 13-13 in accordance with an embodiment of the invention;
FIG. 14 is an elevational view of the apparatus of FIG. 11 depicted along line 14-14 in accordance with an embodiment of the invention;
FIG. 15 is an elevational view of the apparatus of FIG. 12 depicted along line 15-15 in accordance with an embodiment of the invention;
FIG. 16 is an elevational view of an apparatus for installing a fabric decking in a frame of an article of furniture in accordance with another embodiment of the invention;
FIG. 17 is a flow diagram of a method for installing a deck assembly in an article of furniture in accordance with an embodiment of the invention;
FIG. 18 is a partial perspective view of an installation tool according to one embodiment of the invention;
FIG. 19 is a partial perspective view of the tool of FIG. 18 in use installing a fabric to a deck;
FIG. 20 is a perspective view of an installation apparatus according to an embodiment of the invention;
FIG. 21 is a view similar to FIG. 20 from a different angle;
FIG. 22 is an enlarged, partial view of the locking mechanism of the apparatus of FIG. 20, shown in the locked position;
FIG. 23 is a view similar to FIG. 22, shown in the unlocked position;
FIG. 24 is an enlarged, partial perspective view, similar to FIG. 23, but with the collar and handle in place on the shaft;
FIG. 25 is an enlarged, partial perspective view, similar to FIG. 22, but with the collar and handle in place on the shaft;
FIG. 26 is a view, similar to FIG. 20, showing a fabric decking material in place, unstretched;
FIG. 27 is a view, similar to FIG. 26, showing the fabric in a stretched condition;
FIG. 28 is a perspective view of an installation apparatus according to an embodiment of the invention;
FIG. 29 is a view similar to FIG. 28, shown with fabric in the stretched position;
FIG. 30 is a view of the engagement mechanism, shown with parts broken away to show details of construction;
FIG. 31 is a view similar to FIG. 28, shown with a needle guard in place;
FIG. 32 is an enlarged, partial perspective view showing portions of the needle guard in more detail;
FIG. 33 is a view similar to FIG. 32, shown with the needle guard in a raised position; and
FIG. 34 is a view of the central area of the needle guard, showing the two-piece construction of the needle guard.
DETAILED DESCRIPTION
The subject matter of select embodiments of the invention is described with specificity herein to meet statutory requirements. But the description itself is not intended to necessarily limit the scope of claims. Rather, the claimed subject matter might be embodied in other ways to include different steps, components, or combinations thereof similar to the ones described in this document, in conjunction with other present or future technologies. Terms should not be interpreted as implying any particular order among or between various steps herein disclosed unless and except when the order of individual steps is explicitly described.
Referring to the drawings, and particularly to FIG. 1, there is illustrated a seating product 10. The seating product 10 may be, for example, a seat section or a back section of a chair, sofa, love seat, sectional, or any other article of furniture. The seating product 10 comprises a frame 12 and deck assembly 20 secured to the frame. The deck assembly can include a wire grid assembly 20 (as illustrated in the embodiment depicted in FIG. 1) or a fabric deck. One or more layers of padding 40 may cover one or more surfaces of the seating product. A covering 42 may be disposed over the padding 40.
As illustrated in FIG. 1, the frame 12 comprises a front rail 14, a rear rail 16 and a pair of opposed side rails 18. The front and rear rails 14, 16 comprise a pair of opposed rails. The frame 12 may be constructed by any material known and used in the art, and is typically constructed from wood. The size of the frame 12 will vary depending on the application, and may be adapted for use, for example, as a seat section or a seat back of a piece of furniture.
A wire grid assembly 20 is illustrated in FIG. 1 as extending between the front rail 14 and the rear rail 16 of the frame 12. The wire grid assembly may be any such assembly known and used in the art, and the construction of the assembly is not limited by the description herein. For example, in one embodiment, the wire grid assembly may be an assembly such as the Perma-Eze™ or Perma-Eze-Plus™ Grid Construction as manufactured and sold by the Flex-O-Lators division of Leggett & Platt®, Incorporated. In such an embodiment, the wire grid assembly includes 1″ spaced 18 gauge oil-tempered spring wires which pierce HDPE tubing center cords. The spring wires are “lock-knotted” around 12 gauge oil-tempered border wires. The border wires may be covered with kraft-paper, plastic, or any other appropriate material.
In another embodiment, as illustrated in FIG. 2, the wire grid assembly 20 comprises a plurality of spaced spring wires 22, which are secured at each end to a pair of border wires 26, 28 which are arranged perpendicularly to the spring wires 22. The spring wires 22 are held in place with one or more center cords 24. The spring wires 22 may pierce the center cords 24 or may be coupled to the center cords 24 in any other manner known in the art. In one embodiment, the spring wires may have a plastic coating that helps protect them from wear. In other embodiments, the spring wires may be coated with a different material or left uncoated.
The wire grid assembly 20 extends between the front rail 14 of the frame 12 and the rear rail 16 of the frame 12. A front end of the wire grid assembly 20 is coupled to the front rail 14 of the frame 12. As shown in FIGS. 1 and 2, this coupling may be achieved by disposing a textile border 30 between the wire grid assembly and the front rail 14 of the frame 12. This textile border 30 may be made of elastomeric fabric or non-elastic fabric. The textile border 30 may be secured to the wire grid assembly 20 by weaving the border 30 into the wire grid assembly 20 during manufacture. In other embodiments, the textile border 30 may be secured to the wire grid assembly 20 by any number of other methods. In an embodiment, the textile border 30 may be further secured to the frame 12 with standard upholstery staples 38, as shown in FIG. 2.
As shown in FIG. 2, the wire grid assembly 20 may be flexibly coupled to the rear rail 16 of the frame 12. The flexible coupling may be achieved, for example, by disposing a second textile border 32 between the wire grid assembly 20, adjacent to border wire 28, and the rear rail 16 of the frame 12. As with the first textile border 30 described above, the second textile border 32 may be made of elastomeric fabric or non-elastic fabric. For example, the textile border of the present invention may be made of any number of woven or nonwoven fabric materials. One such type of webbing material is a polyester material trademarked “SYTEX®”, manufactured by the MATREX® division of Leggett & Platt®, Incorporated. A second alternative type of webbing material suitable for making a textile border used in the present invention is a woven polypropylene material containing rubber or elastomeric filaments. Another alternative type of webbing material suitable for making a textile border used in the present invention is a laterally-stretchable warp knit fabric such as, for example, the laterally-stretchable fabric described in U.S. application Ser. No. 12/700,336, filed Feb. 4, 2010, and entitled “Laterally-Stretchable Knit Fabric,” the entirety of which is incorporated herein by reference. However, these are just three examples of any number of materials that may be used for the textile border in the present invention.
In one embodiment, the second textile border 32 comprises an elastomeric fabric, thereby providing a comfortable seating platform. The second textile border 32, like the first textile border 30, may be fastened to the rear rail 16 of the frame 12 in any number of ways known in the art. As shown in FIG. 2, for example, the second textile border 32 may be fastened to the rear rail 16 of the frame with standard upholstery staples 38. In one embodiment, the textile border 32 may be stretched before attachment to the rear rail 16 as described more fully below.
Turning now to FIG. 3, there is illustrated a top plan view of a portion of the seating product illustrated in FIGS. 1 and 2. More specifically, FIG. 3 illustrates a top plan view of a wire grid assembly 20 having a first textile border 30 attached to a front side of the wire grid assembly 20 and disposed adjacent to a border wire 26. In one embodiment, as illustrated in FIG. 3, the first textile border 30 comprises a non-elastic fabric and is woven into the wire grid assembly 20 during manufacture. The wire grid assembly 20 illustrated in FIG. 3 further includes a second textile border 32 attached to a rear side of the wire grid assembly 20 and adjacent to a border wire 28. The second textile border 32 comprises an elastomeric fabric and is woven into the wire grid assembly 20 along the terminal ends of the spaced spring wires 22 on a rear side of the assembly in a manner similar to that discussed above. For example, in an embodiment, the second textile border 32 can comprise a laterally-stretchable fabric such as the fabric described in U.S. application Ser. No. 12/700,336. In an embodiment, as illustrated in FIG. 4, the second textile border 32 may be secured to the wire grid assembly 20 by one or more metal fasteners 40 disposed between the textile border 32 and the wire grid assembly 20. Similarly, the first textile border 30 can be attached to the wire grid assembly 20 in the manner described in FIG. 4 or in any other suitable manner.
The wire grid assembly 20 includes a plurality of spaced spring wires 22 that are held in place by a plurality of center cords 24. On a front side of the wire grid assembly, the spaced terminal ends of the spaced spring wires 22 are woven into the first textile border 30 such that the spaced spring wires 22 pierce the textile border 30. The spaced spring wires 22 may be secured to the border wire 26 by wrapping each spaced spring wire 22 around the border wire 26 and knotting the spaced spring wire 22.
Turning now to FIG. 5, there is illustrated a seating product 60, in accordance with other embodiments of the inventions. The seating product 60 may be, for example, a seat section or a back section of a chair, sofa, love seat, sectional, or any other component of furniture. The seating product 60 comprises a frame 62 and a fabric seat deck 70 secured to the frame. According to some embodiments, the fabric seat deck 70 can be a single piece of strong fabric such as, for example, woven polypropylene fabric, woven nylon fabric, and the like. As depicted in FIG. 5, a cushion 75 can simply be positioned atop the fabric seat deck 70 as shown. In other embodiments, the fabric seat deck 70 itself can serve as the primary seating surface and can be covered in various materials, coated, finished, and the like, for any number of aesthetic appearances.
As illustrated in FIG. 5, the frame 62 comprises a front rail 64, a rear rail 66 and a pair of opposed side rails 68. The front and rear rails 64, 66 comprise a pair of opposed rails. The frame 62 may be constructed by any material known and used in the art, but is typically constructed from wood. The size of the frame 62 will vary depending on the application, and may be adapted for use, for example, as a seat section or a seat back of a piece of furniture.
The fabric deck 70 is illustrated in FIG. 5 as extending between the front rail 64 and the rear rail 66 of the frame 62. The fabric deck 70 includes any number of types of fabric. In some embodiments, the fabric deck 70 is a single piece of fabric, and in other embodiments, fabric deck 70 includes a number of pieces of fabric. Different types of fabric can provide different aesthetics and functionality. For example, according to an embodiment, the fabric deck 70 comprises a single piece of woven polypropylene, which is a strong and affordable fabric. According to other embodiments, the fabric deck 70 can comprise woven nylon, a more expensive fabric, if greater strength and/or aesthetic appeal is desired.
The fabric deck 70 extends between the front rail 64 of the frame 62 and the rear rail 66 of the frame 62. A front end of the fabric deck 70 is coupled to the front rail 64 of the frame 62. As shown in FIG. 5, the fabric deck 70 can be coupled directly to front rail 64 of the frame. For example, in an embodiment, fabric deck 70 can be secured to the frame 62 using standard upholstery staples 74.
Turning briefly to FIG. 7, embodiments of the inventions include embodiments in which this coupling is achieved by disposing a textile border 72 between the fabric deck 70 and the front rail 64 of the frame 62. This textile border 72 may be made of elastomeric fabric or non-elastic fabric. The textile border may be secured to the fabric deck 70, for example by weaving the border into the fabric deck 70 during manufacture. In other embodiments, the textile border 72 may be secured to the fabric deck 70 by any number of other methods. For example, textile border 72 can be sewn to fabric deck 70 using a series of stitches. The textile border 72 may be further secured to the frame 62 with standard upholstery staples 74, as shown in FIG. 6.
Returning to FIG. 5, the fabric deck 70 may be flexibly coupled to the rear rail 66 of the frame 62. The flexible coupling may be achieved, for example, by disposing a second textile border 80 between the fabric deck 70 and the rear rail 66 of the frame 62. As with the first textile border 72 described above with reference to FIG. 7, the second textile border 80 may be made of elastomeric fabric or non-elastic fabric. For example, the textile border of the present invention may be made of any number of woven or nonwoven fabric materials. One such type of webbing material is a polyester material trademarked “SYTEX®”, manufactured by the MATREX® division of Leggett & Platt®, Incorporated. A second alternative type of webbing material suitable for making a textile border used in the present invention is a woven polypropylene material containing rubber or elastomeric filaments. In other embodiments, the textile border 80 can be a length of a laterally-stretchable warp knit fabric, as described in U.S. application Ser. No. 12/700,336.
With reference to FIG. 6, a seating product according to embodiments of the invention may have a fabric seat deck 70 disposed between a front 64 and rear rail 66 of a frame 62, wherein a front side of the fabric seat deck 70 is flexibly coupled to the frame 62 by disposing a non-elastic textile fabric 72 between the front rail 64 of the frame 62 and the fabric seat deck 70. The fabric seat deck 70 may further be flexibly coupled to the rear rail 66 of the frame 62 by disposing a plurality of helical springs 76 between the fabric seat deck 70 and the rear rail 66 of the frame 62. Each of the helical springs 76 may be secured to the fabric seat deck 70 at one end of the helical spring 76 and attached to a metal hangar 78 that is secured to the rear rail 66 of the frame 62 at an opposite end of the helical spring 76.
With reference to FIG. 7, a fabric seat deck 70 is illustrated as extending between the front rail 64 and the rear rail 66 of the frame 62. A front end of the fabric deck 70 is coupled to the front rail 64 of the frame 62. As shown in FIG. 6, embodiments of the inventions include embodiments in which this coupling is achieved by disposing a textile border 72 between the fabric deck 70 and the front rail 64 of the frame 62. This textile border 72 may be made of elastomeric fabric or non-elastic fabric. The textile border may be secured to the fabric deck 70, for example by weaving the border into the fabric deck 70 during manufacture. In other embodiments, the textile border 72 may be secured to the fabric deck 70 by any number of other methods. For example, textile border 72 can be sewn to fabric deck 70 using a series of stitches. The textile border 72 may be further secured to the frame 62 with standard upholstery staples 74, as shown in FIG. 7.
With continued reference to FIG. 7, the fabric deck 70 may be flexibly coupled to the rear rail 66 of the frame 62. The flexible coupling may be achieved, for example, by disposing a second textile border 80 between the fabric deck 70 and the rear rail 66 of the frame 62. As with the first textile border 72 described above with reference to FIG. 5, the second textile border 80 may be made of elastomeric fabric or non-elastic fabric. For example, in some embodiments, the textile border 80 can be a length of a laterally-stretchable warp knit fabric, as described in U.S. application Ser. No. 12/700,336.
With reference now to FIGS. 8-16 components, apparatus, and methods for installing a decking in an article of furniture are described. Turning initially to FIG. 8, a deck assembly 100 is depicted. The deck assembly 100 includes a decking 102, a front frame rail 104, and a rear frame rail 106. The decking 102 comprises any combination of elastomeric and non-elastomeric fabrics, wire grids, and other components as described above. In an embodiment, the decking 102 comprises a single section of an elastomeric fabric, as depicted in FIG. 8. The decking 102 is manufactured or cut to a desired length and width based on the design specifications of an article of furniture into which the deck assembly 100 is to be installed and based on the amount of tension or stretching that is to be imparted in the decking 102.
The front and rear frame rails 104, 106 comprise any desired material, and typically are made of wood. The decking 102 is attached to the front and rear frame rails 104, 106 along opposing edges of the decking 102 by any methods used in the art. In an embodiment, the decking 102 is attached to the front and rear frame rails 104, 106 using a plurality of standard upholstery staples 108. Further, the decking 102 is attached to the front and rear frame rails 104, 106 while in a relaxed state, e.g. while the decking 102 is not under tension.
Current methods used in the art require attaching an edge of a decking material to a frame of an article of furniture and then grasping and pulling the opposite edge to stretch the material over the frame while installing upholstery staples to secure the opposite edge to the frame. Such methods are difficult for operators and may lead to ripping or tearing of the decking materials and excess waste of the materials, among other drawbacks. By attaching the decking 102 to the front and rear frame rails 104, 106 in a relaxed state operator difficulties and the risks of tearing, ripping, or otherwise harming the decking material 102 during attachment are eliminated or greatly reduced over current methods. And the decking material 102 can be cut or manufactured to size without providing additional excess material for gripping and stretching.
As will be described in greater detail below and depicted in FIG. 9, the deck assembly 100 is installed on a frame 110. The frame 110 includes a front side 112, a rear side 114, and a pair of opposing ends 116, 118. The frame 110 may be constructed from any material known and used in the art, but is typically constructed from wood. The frame 110 includes any dimensions suitable for use with an associated article of furniture.
As depicted in FIG. 9, in an assembled condition, the front frame rail 104 of the deck assembly 100 is coupled to the front side 112 and the rear frame rail 106 is coupled to the rear side 114 of the frame 110 using any fastener 120 or coupling used in the art, e.g. screws, nails, bolts, or the like. In an embodiment, the front and/or rear frame rails 104, 106 are integral with the front and rear sides 112, 114 of the frame. In the assembled condition, the decking 102 is stretched between the front and rear frame rails 102, 104 to provide a desired amount of tension or firmness.
Turning now to FIG. 10, an apparatus 200 for installing the deck assembly 100 on the frame 110 of an article of furniture is described in accordance with an embodiment of the invention. The apparatus 200 includes a surface 202, a pair of actuators 204 and a plurality of fixtures 206. The surface 202 is any surface, table, workstation, or the like that is suitable to support the actuators 204, the fixtures 206, and the frame 110 of an article of furniture during installation of the deck assembly 100. The surface 202 may include features (not shown) for properly locating the frame 110 or that provide indications for positioning a plurality of different frames 110 from various articles of furniture. The surface 202 might also include one or more features (not shown) that provide adjustability of the location of the actuators 204 and/or the fixtures 206.
The actuators 204 comprise any type of actuator known in the art. As depicted in FIGS. 10-12, in an embodiment, the actuators 204 include pneumatic or hydraulic cylinders (various components associated with pneumatic and hydraulic cylinders, such as tubing, pumps, and the like are not depicted for sake of clarity). But, the actuators 204 might also include an electronic actuator or a mechanical hand-driven actuator, among a variety of others. A pair of actuators 204 is depicted in FIGS. 10-12 however any number of actuators might be employed.
The actuators 204 each include a piston rod 208 that is coupled to a push bar 210. The push bar 210 is configured to contact the front or rear side 112, 114 of the frame 110 and to apply a force thereto. As such, the push bar 210 may include a broad, flat surface to distribute the force across the front or rear side 112, 114 of the frame 110 and to avoid damaging the side 112, 114 of the frame. The push bar 210 might also be configured to cooperate with any features, shapes, or other characteristics of the frame 110. For example, a frame might include bowed or non-planar side and the push bar 210 might include with a similar non-planar configuration. In an embodiment, the push bar 210 aids to equally distribute the force applied between the two actuators 204 and to equalize the length of the stroke. The push bar 210 may also include one or more features to aid in maintaining the position of the frame 110 with respect to the push bar 210 during installation of the deck assembly 100. In another embodiment, each of the actuators 204 includes a separate push bar 210. In such an embodiment, the force applied by the actuators might be equalized through the use of valves or supply/return lines used to propel the actuators 204. Or the actuators 204 might each be configured to apply a different amount of force and/or stroke length.
In an embodiment, the actuators 204 are mounted on a base 212. The bases 212 elevate the actuators 204 to a desired height for application of the force on the frame 110. In an embodiment, the bases 210 are not employed. In such an embodiment, the actuators 204 are mounted to the surface 202 directly and the push bar 210 might be configured to apply the force at the desired height. The bases 212 are coupled to the surface 202 to rigidly maintain the position of the actuators 204 during installation of the deck assembly 100.
The fixtures 206 are configured to receive and rigidly maintain one of the front or rear frame rails 104, 106 against an applied force. The fixtures 206 are constructed from any desired materials, such as metals, wood, plastics, composites, or the like. Four fixtures 206 are depicted in FIGS. 10-12 however any number of fixtures 206 can be used. The fixtures 206 are rigidly coupled to the surface 202 using any desired fasteners, e.g. bolts. In an embodiment, the fixtures 206 are removable from the surface 202 and their location may be adjusted. In another embodiment, the fixtures 206 are arranged on the surface to accommodate frames from one or more different articles of furniture.
The fixtures 206 include a body 214 and a receptacle 216. As depicted in FIGS. 13-16, the body 214 of the fixture 206 has a right triangular form arranged with a first leg 218 of the triangle contacting the surface 202 and a second leg 220 standing perpendicular to the surface 202 and facing toward the actuators 204. In another embodiment, the body 214 includes any desired form or shape.
The receptacle 216 is mounted on the body 214 at an end of the second leg 220 distal to the surface 202. The receptacle 216 provides a slot 222 into which the front or rear frame rail 104, 106 can be removeably received. The receptacle 216 rigidly maintains the front or rear frame rails 104, 106 against movement into the slot 222 and rotation about the slot 222 when a force is applied to the frame rail 104, 106 as described below. In an embodiment, the receptacles 216 are adjustable to different heights and different slot 222 widths to accommodate various frames 110 and frame rails 104, 106.
The fixtures 206 are further configured to align the frame rail 104, 106 disposed therein with a respective side 112, 114 of the frame 110. As depicted in FIGS. 8 and 13-15, the frame rails 104, 106 are aligned with a top surface 122 of the frame 110. In another embodiment, the frame rails 104, 106 are aligned with any desired feature or location on the frame 110. For example, in a particular design, the frame rails might fit within the frame and may be attached to a ledge or other feature interior to the frame.
As depicted in FIGS. 10-15, the actuators 204 and the fixtures 206 are coupled to the surface 202 such that the frame 110 of an article of furniture is disposed around the fixtures 206 with a side 112, 114 of the frame 110 being between the actuators 204 and the fixtures 206. It is to be understood that various other configurations might be employed without departing from the scope of embodiments of the invention described herein. For example, in an alternative embodiment depicted in FIG. 16, the actuators 204 are positioned on an opposite side of the fixtures 206. As such, the frame 110 is disposed around both the actuators 204 and the fixtures 206 and the actuators 204 apply a force to an interior wall of the frame 110. In another embodiment, the actuators are coupled to a side 112, 114 of the frame 110 and pull the frame 110 rather than push the frame 110 (not shown).
With reference now to FIG. 17, a method 300 for installing the deck assembly 100 in the frame 110 is described in accordance with an embodiment of the invention. The decking 102 is attached to the front and rear frame rails 104, 106 to form the deck assembly 100, as indicated at a step 302. The decking 102 is attached using a plurality of standard upholstery staples 108. In another embodiment the decking 102 is attached using any desired method including, for example, adhesives, glues, tacks, clamps, or the like. In an embodiment, the decking 102 is only attached to the front frame rail 104 and the rear frame rail 106 is omitted.
As indicated at a step 304, the rear frame rail 106 is attached to the rear side 114 of the frame 110. The attachment is made using any desired fasteners 120, such as, screws, nails, bolts, or the like. In embodiments in which the rear frame rail 106 is omitted, the decking 102 is directly attached to the rear side 114 of the frame using standard upholstery staples 108 or any other desired method.
The frame 110, with the deck assembly 100 attached to the rear side 114 thereof is disposed on the surface 202, as indicated at a step 306. The frame 110 is placed on the surface 202 such that the front side 112 of the frame 110 lies between the fixtures 206 and the push bar 210 of the actuators 204. The front frame rail 112 is disposed in the slots 222 of the receptacles 216 on the fixtures 206 as indicated at a step 308. Embodiments are described herein in which the rear frame rail 106 is attached to the frame 110 and the front frame rail 104 is disposed in the fixtures 206, however it is to be understood that the attachment might be reversed, e.g. the front frame rail 104 might be attached to the front of the frame 112 and the rear frame rail 106 disposed in the fixtures 206, without departing from the scope of embodiments of the invention described herein.
At a step 310, the actuators 204 are activated to press the push bar 210 against the front side 112 of the frame 110 and apply a force thereto. The actuators 204 apply a force great enough to slide the frame 110 across the surface 202 and to stretch the decking material 102. The actuators 204 continue to apply the force and move the frame 110 until the front frame rail 104 contacts the front side 112 of the frame 110 or achieves a desired alignment with the frame 110, as indicated at a step 312. The distance that the actuators 204 move the frame 110 and the width of the decking 102 are configured to provide a desired amount of tension in the decking 102.
The front frame rail 104 is coupled to the front side 112 of the frame 110 using any desired fasteners 120, as indicated at a step 314. The actuators 204 are unloaded and/or reversed to relieve the force on the frame 110 and the front frame rail 104 is removed from the receptacles 216 of the fixtures 206, as indicated at a step 316. The frame 110 with the installed deck assembly 100 is removed from the apparatus 200 and installed in an article of furniture as desired.
In embodiments of the invention, installation of the deck assembly 100 as described above provides uniform tension across the decking 102 while reducing or eliminating rips, cuts, or tears in the decking, and reducing material waste. The installation is much less labor intensive and time consuming for operators than prior methods involving pulling or stretching the decking by hand and attaching the decking to the frame while under tension. And embodiments of the invention may be more easily automated to increase production and decrease risks of operator injury, among other benefits.
With reference now to FIGS. 18-34 components, apparatus, and methods of a different embodiment for installing a decking in an article of furniture are described. Turning initially to FIG. 18, an installation tool 350 is depicted. Tool 350 is designed to better grip, and stretch, a decking material over a frame. As best seen in FIG. 18, the tool 350 has a cylindrical base 352. Base 352 can be a solid cylinder, or can made hollow to reduce the weight of the tool. A portion of the outer surface of the base 352 has a textured surface 354. Surface 354 can be formed directly on the surface of base 352, or can be supplied as an additional coating or material. The function of the surface 354 is to provide a frictional grip to the frame when in use, as is further described below. In one embodiment, surface 354 extends approximately halfway around base 352, although the surface 354 could extend lesser, or further around the base. Extending in a spaced relation along a length of the cylinder are a number of gripping needles 356. Needles 356 preferably extend from the cylinder at an angle less than ninety degrees. Tool 350 also has a handle 358 extending radially away from base 352 in a location spaced from needles 356 by approximately ninety degrees.
FIG. 19 shows tool 350 in use, stretching a fabric decking material 360 over a frame 362. In use, the fabric decking material is engaged with the needles 356 near the edge of the frame 362. In this initial position, the handle 358 would be oriented in a more upright position, compared to that shown in FIG. 19. In this position, the surface 354 engages with an upright face of the frame 362. An operator then rotates the handle 358 downwardly, which rotates the needles 356 as well. This rotation grips the material 360 and stretches it to a desired tension. In the stretched condition, the operator then secures the material in place on the frame, such as by a line of stapes along the forward, top edge of the frame 362. In one embodiment, the tool has a width less than the width of the frame 362. In such a case, the operator uses the tool as described above, releases the needles 356 from the material 360 after applying the staples, and moves the tool to an adjacent location to repeat the process. By engaging the needles with the fabric in substantially the same location each time, and by rotating the handle to substantially the same stretched position, the operator can achieve a consistent tension in the material 360 across the entire width of the frame 362.
FIGS. 20-27 illustrate a mechanism 370 that applies concepts similar to that of tool 350, but allow the fabric decking material to be stretched across the width of a frame in a one step process. Mechanism 370 includes a support plate 372 that extends between two upstanding ends 374. Ends 374 support a central shaft 376 and allow the shaft to rotate. As best seen in FIG. 20, a first end of shaft 376 is maintained in place with a collar 378. Collar 378 also serves as an anchor point for an extension spring 380. The other end of spring 380 is attached to the end 374. Spring 380 serves to bias the mechanism 370 to a ready, upright position, as is further described below.
The opposite end of shaft 376 is also held in place with a collar 382. As best seen in FIGS. 22-25, collar 382 is placed around shaft 376 adjacent an end 374. Collar 382 has a retaining notch 384 formed in the outer radial region. In addition to collar 382, a second collar 386 is held in place around shaft 376 adjacent collar 382. Collar 386 has a radially extending handle 388 that may have an enlarged, gripping section 390. Handle 388 is used to rotate shaft 376, the importance of which is further described below.
A retaining lever 392 is also coupled to the end 374. Lever 392 has a hole 394, through which is placed a coupling bolt 396 to secure the lever 392 to the end 374. The bolt 396 allows the lever 392 to rotate. Lever 392 has a first arm 398 and a second arm 400. Arm 400 includes a catch surface 402, designed to mate with the retaining notch 384. Arm 400 also includes a mounting area for a spring anchor 404. A second spring anchor 406 is coupled directly to the end 374, and a spring 407 is coupled between the spring anchor 404 and 406. The spring 407 biases the catch surface 402 towards the collar 386.
The shaft 376 has an enlarged section 408 extending between the ends 374. Section 408 can be integrally formed with shaft 376, or can be attached to the shaft. A series of spaced, extending needles 410 protrude from section 408. Needles 410 are similar to those of tool 350. Preferably, needles 410 extend outwardly a distance allowing them to extend through a fabric decking material.
In use, the mechanism 370 is placed adjacent a furniture frame 412. Preferably, section 408 has a width approximately equal to the furniture frame 412. It should also be understood, however, that wider, or narrower mechanisms 370 could be used. As best seen in FIG. 26, a fabric decking material 414 can be secured across the back end of the frame 412, such as by stapling. The operator can then pull the material taut, and engage the material with the needles 410, to hold the material in place. As shown in FIGS. 20, 21 and 26, the needles are oriented in a substantially upright position at the outset. Spring 380 operates to orient the needles in this way. Once the fabric is engaged with the needles 410, the operator moves the handle 388 (using gripping section 390) to the position shown in FIG. 27. This causes the needles to rotate, and therefore places the fabric material 414 under tension. As the operator moves the handle, the collar 382 rotates from the position shown in FIG. 23, to the position shown in FIG. 22. The biasing spring 407 causes the lever 392 to rotate, and engages the catch surface 402 with the retaining notch 384. In this condition, the operator can release the handle 388, and it will remain in place due to the engagement of the lever 392 and the collar 382. Once locked in place, the operator can release the handle, and can secure the fabric decking material 414 to the frame 412, by stapling the fabric in place along the top, front edge of the frame. The excess material can be trimmed, and the operator can rotate lever 392 to release the catch surface 402 from the retaining notch 384. The spring 380 operates to return the handle and needles to a start position, such as is shown in FIGS. 20 and 21, and the process can be repeated.
Another embodiment of the installation apparatus is illustrated in FIGS. 28-34. The overall concepts of this embodiment are similar to those described above for tool 350 and mechanism 370. As best seen in FIG. 28, a powered mechanism 420 is shown that spans the width of a frame 422, over which will be installed a fabric decking material. Mechanism 420 includes a base 424 with an end support 426, a middle support 428 and an actuator support 430. These supports operate to axially support a cylinder 432 for rotation about a central axis. Like earlier embodiments, cylinder 432 has a series of spaced, protruding needles 434 along the length of the cylinder.
The actuator support 430 is best seen in FIGS. 28-30. Actuator support 430 includes a housing 436 that supports one end of cylinder 432. More specifically, housing 436 has a bearing 438 that supports one end of the cylinder. As best seen in FIG. 30, this end of the cylinder also has a pinion gear 440 installed thereon, located within the housing 436. Gear 440 mates with a corresponding rack 442, oriented vertically within the housing 436. Rack 442 is supported and guided by a guide block 444. An actuating mechanism 446 is disposed directly on top of housing 436. Mechanism 446 can be any of a number of different types of linear actuators, gas cylinders, etc. In one embodiment, mechanism 446 is an air cylinder, with an extending piston 448, which is in turn coupled to the rack 442. When mechanism 446 is triggered, the piston 448 extends, moving rack 442 downwardly and imparting a rotational movement to gear 440 and thus the cylinder 432. The mechanism can also be used to return the cylinder 432, gear 440 and rack 442 to the original starting position when desired. Although not shown, the mechanism is operationally coupled to the source of power, such as a pneumatic line, electrical power, etc.
In use, the cylinder is oriented such that the needles 434 are substantially upright, as shown in FIG. 28. The operator can then secure a fabric decking material 450 (FIG. 29) to the rear edge of frame 422, such as by stapling. The decking material can then be pulled to the front of frame 422 and is held in place by needles 434. Once the decking material 450 is engaged with the needles 434 along the length of the frame 422, the mechanism 446 is actuated, causing the cylinder 432 to rotate, as is shown in FIG. 29. This rotation causes a uniform, consistent tension to be applied to the decking material 450. Once tensioned, the operator can secure the decking material in place, under tension, by applying a series of staples through the decking material 450 and into frame 422 along the front edge of the frame. Any excess material can be trimmed, and the process can be repeated for another frame.
As best seen in FIGS. 31-34, one embodiment includes a needle guard arrangement 458. This arrangement includes a number of spaced supports 460. Supports 460 can be secured to the supports 426-430, or can be secured to a support surface 462, upon which the entire powered mechanism 420 rests. Preferably, the needle guard 458 includes first and second sections 462. Each section 462 is coupled between a pair of supports 460 by hinges 464. As best seen in FIG. 33, each hinge is coupled to a guard plate 466. The guard plate 466 extends the entire width between the corresponding pair of hinges 464. An extension rail 468 is coupled to each guard plate and extends outwardly from the guard plate 466. The extension rail 468 extends from the guard plate 466 a distance that allows the guard plate 466 to be spaced away from needles 434 to protect the needles from damage from the guard plate. The rail 468 also functions to positively secure the needles 434 through fabric decking material 450. Once in place, the guard plate 466 also functions to protect the operator from any accidental engagement with the needles 434. As best seen in FIG. 32, each hinge 464 may also include a spring 470 that assists an operator in returning the guard plate 466 to the open position shown in FIG. 33.
In use, the process proceeds largely as described above, with the fabric decking material 450 secured to the back edge of frame 422 and pulled forwardly. With the guard plates in the open position shown in FIG. 33, the decking material is placed over the needles 434, and under the guard plates 466. The guard plates 466 can then be lowered, such that the rail 468 engages the fabric decking material 450 and positively pushes the needles 434 through the decking material. After the guard plates 466 have both been lowered, the operator can activate the mechanism 446 to rotate the cylinder 432 and the needles 434, placing the fabric material 450 under tension. The operator can then secure the material 450 to the frame 422, such as by stapling. Preferably, the guard plates 466 are sized such that they extend to the front edge of frame 422, but not over the frame. In this way, the guard plates 466 act as a staple guide for the operator. As can be seen in FIG. 29, without the needle guard, it can be somewhat difficult to locate the front edge of the frame 422 once the fabric decking material is extended over the frame. By having a straight and properly position guard plate, the operator is provided with a more positive location for the front edge of the frame 422.
Many different arrangements of the various components depicted, as well as components not shown, are possible without departing from the scope of the claims below. Embodiments of the technology have been described with the intent to be illustrative rather than restrictive. Alternative embodiments will become apparent to readers of this disclosure after and because of reading it. Alternative means of implementing the aforementioned can be completed without departing from the scope of the claims below. Certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations and are contemplated within the scope of the claims.
Patent Grant
9247820
