Flexible net parts for play equipment

Abstract

Embodiments of play equipment (800, 1700) including net grids (100, 200, 300, 400, 502, 802, 1702) are disclosed. The net grids (100, 200, 300, 400, 502, 802, 1702) are attached directly or indirectly to the play equipment (800, 1700). First and second segments (412, 414) of net ropes (102, 202, 302, 402, 1000, 1100) are part of the net grids (100, 200, 300, 400, 502, 802, 1702) and include an outer net rope layer (1102) of fabric surrounding an inner net rope layer (1106) of fabric. Also, net clamps (104, 204, 304, 404, 1600) are part of the net grids (100, 200, 300, 400, 502, 802, 1702). The first and second segments (412, 414) of the net ropes (102, 202, 302, 402, 1000, 1100) extend substantially parallel to each other through the net clamps (104, 204, 304, 404, 1600). The net clamps (104, 204, 304, 404, 1600) fix the first segment (412) of the net rope to the second segment (414) of the net rope where the first segment (412) of the net rope and the second segment (414) of the net rope extend substantially parallel to each other.

Description

Background Art

[0001] Designing parts for incorporation into play equipment presents unique challenges. One should consider the fact that play equipment is prone to maintenance delays and sometimes takes years to replace parts. Also, optimization to avoid injuries caused, for example, by falls should be considered. Play equipment parts should also be designed to withstand extreme environmental considerations (often winter snow and ice, followed by extreme heat and rainfall in spring and summer). Also, one should consider the fact that play equipment parts are often used by children with little or no adult supervision. Finally, most if not many play equipment parts are left in an open state with little or no monitoring and are vulnerable to vandalism. When these and other factors come into play, it is required that excellent designers create desirable play equipment parts. There is a constant need for well-designed parts that play equipment designers can confidently select.

Summary of the Invention

Means for Solving the Problems

[0002] Embodiments of play equipment including a net lattice are disclosed. The net lattice is attached directly or indirectly to the play equipment. First and second segments of a net rope are part of the net lattice and include an outer net rope layer of fabric surrounding an inner net rope layer of fabric. Also, a net clamp is part of the net lattice. The first and second segments of the net rope extend substantially parallel to each other through the net clamp. The net clamp secures the first segment of the net rope to the second segment of the net rope where the first and second segments of the net rope extend substantially parallel to each other.

[0003] These and various other features and advantages characterizing the embodiments according to the claims will become apparent upon reading the following detailed description and referring to the corresponding drawings.

Brief Description of the Drawings

[0004]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figures 7A - 7B

Figure 8

Figures 9A - 9B

Figure 10

Figure 11

Figure 12

Figure 13

Figures 14A - 14B

Figure 15

Mode for Carrying Out the Invention

[0005] Detailed Description of Exemplary Embodiments As play equipment becomes more diverse and enjoyable, net-type components have become increasingly common. In many cases of play equipment, it is desirable for net-type components to comfortably accommodate a large number of users of various physiques. Also, in many cases of play equipment, it is desirable for net-type components to exhibit long-term strength and durability. The embodiments described herein address these and other design considerations regarding net-type play equipment components.

[0006] FIG. 1 is a perspective view of a portion of the net lattice 100. The net lattice 100 includes, as shown, one or more net ropes 102 that are at least substantially uniformly distributed so as to form the net lattice 100. The net ropes 102 can include a plurality of separate net rope segments, such as segments of the same length or different lengths. Alternatively, it may be one continuous net rope 102 having a length sufficient to form some or all of the net lattice 100.

[0007] The net lattice 100 also includes, as shown, a plurality of net clamps 104. As shown, the network of net clamps 104 is arranged at least substantially uniformly. For example, as shown in FIG. 1, there is a group of net clamps 104 formed in a straight line horizontally (the row of left - right clamps in FIG. 1), and then there is a group of net clamps 104 formed in a straight line vertically (the column of up - down clamps in FIG. 1). Each net clamp 104 draws two portions of the net rope 102 towards each other to form an aesthetically pleasing pattern that is characteristic of the net lattice 100. As will be described in more detail below, in one embodiment, the net clamp 104 is configured to fix the portions of the net rope 102 adjacent to each other (optionally in contact, depending on the design of the net clamp 104) by a crimp - type engagement between the net clamp 104 and the portions of the net rope 102. However, it is expressly contemplated that other forms (such as welding) for fixing the portions of the net rope 102 together may be utilized.

[0008] As shown in FIG. 1, the relative arrangement of the net clamps 104 determines the size, shape and distribution of the spaces incorporated into the pattern of the net grid 100. An example of one such space formed in the net grid 100 is designated by reference numeral 106 in FIG. 1. However, this space 106 is repeated throughout most of the net grid 100 as a result of a substantially uniform dispersion of the net clamps 104 into aligned columns and rows. The spaces 106 formed in the grid 100 can, by way of example, be modified by changing the relative arrangement of the net clamps 104. For instance, by reducing the spacing between successive columns or rows of net clamps 104, the size of adjacent net spaces 106 is reduced. Naturally, theoretically, increasing the spacing between successive columns or rows of net clamps 104 would result in an increase in the size of adjacent net spaces 106. Further, the net clamps 104 need not align consistently into columns or rows. The dispersion of the net clamps 104 can be arranged into an infinite combination to create spaces 106 that are consistent or non-consistent throughout the net grid 100. In other examples, the net clamps 104 are spaced non-consistently at one or more positions, thereby creating changes in size, shape and / or form between one space 106 and the next. For example, the spaces 106 in the net grid 100 can similarly be readily varied in a manner that is consistently or non-consistently arranged depending on the requirements of a given application.

[0009] The fixing of the net clamp 104 to the portion of the net rope 102 is such that, as shown, the elongated center line axis of the net rope 102 is permanently fixed within a common plane (within each net clamp 104). However, net clamps 104 adjacent to each other within a common column or row are allowed freedom of movement relative to each other. In this way, the net grid 100 is, of course, flexible. If given the scheme for connecting portions of the net rope 102 together, the net grid 100 is configured to respond by conforming its shape to accept the weight or pressure applied as a whole. In one embodiment, described in more detail below in connection with other drawings, the net rope 102 is also constructed with a rigid yet flexible design such that when the weight or pressure is removed, the net grid returns to some or all of its original shape and form. For example, if a user sits on the net grid 100, the net grid 100 allows for a comfortable shape conformity to the user's body. When the user leaves the net grid 100, the net grid automatically resumes, illustratively, some or all of the shape and form it had prior to the user sitting. Thus, the net grid 100 facilitates both a safe play structure for convenient climbing and elasticity for comfortable reclining (all while maintaining the net's preferred aesthetic features).

[0010] Figure 2 is a perspective view of a portion of net grid 200. Net grid 200 includes similarities with net grid 100 of FIG. 1, and like parts are given like numbers in FIG. 2. One or more net ropes 202 are connected together at various locations using net clamps 204 to form net grid 200 as shown. And net grid 200 further includes a border rope 206 disposed along the outer perimeter of net grid 200 for providing support and maintaining tension. Border rope 206 has a larger diameter than one or more of the net ropes 202 as shown. Border rope 206 is configured to support the loop portions of net ropes 202. As such, border rope 206 provides a termination or transition point 208 for one or more portions of net ropes 202. Termination or transition point 208 can include any number of loops around border rope 206. However, for many applications, a small number, such as one to three loops, provides adequate structural integrity without adding unnecessary additional material costs.

[0011] As also shown in FIG. 2, in one embodiment, to further facilitate attachment or transition in the border rope 206, transition loops 210 formed in one or more net ropes 202 are provided. In one embodiment, the distal free ends of the one or more net ropes 202 are fixed at or near the termination or transition point 208. However, in another embodiment, the net rope 202 is attached and transitioned at point 208 without incorporation of the free end. Instead, the net rope 202 is transitioned (wrapped) one or more times around the border rope 206 (with or without incorporation of the transition loop 210) and then returns to the net grid 200 as the next adjacent segment of the net rope 202. In this way, the entire grid 200 (excluding the border rope 206, etc.) can be composed of a single stretch of the net rope 202. Additionally, as shown in FIG. 2, the transition loop 210 and / or any portion of the net rope 202 can optionally be further fixed and / or oriented using one or more additional net clamps 204A. In this way, the untying of the end or transition portion of the net rope 202 in the border rope 206 is mechanically prevented.

[0012] Figure 3 is a perspective view of a portion of the net lattice 300. The net lattice 300 includes similarities with the net lattices 100 and 200, and in FIG. 3, similar parts are given similar numbers. The net lattice 300 is particularly similar to the net lattice 200 of FIG. 2. The net lattice 300 includes one or more net ropes 302 and net clamps 304 configured to be joined together to form the structure and pattern of the net lattice 300. The net lattice 300 further includes a border rope 306. Portions of the net rope 302 are looped to form a plurality of rope loops 310 (only one representative is labeled), and the rope loops 310 are formed adjacent to where portions of the net rope 302 are looped around the border rope 306 and form several terminations or transitions at the termination or transition points 308. For example, the labeled rope loop 310 terminates or transitions twice around the border rope 306 as shown and is fixed in place by a plurality of additional net clamps 304A as shown. However, in other examples, more or fewer loops around the border rope 306 may be utilized. In this way, the untying of the terminations or transitions of the net rope 302 around the border rope 306 is mechanically prevented.

[0013] A different matter regarding the net lattice 300 is the inclusion of a rope hook 312 to facilitate fixing the border rope 306 to the play equipment 314. The rope hook 312 is configured to support the border rope 306 within the hooked portion of the rope hook 312 as shown. By supporting the border rope 306, the rope hook 312 helps maintain the tension throughout the net lattice 300. In one example, the rope hook 312 can be compressed or crimped around the border rope 306. In other examples, for instance, in examples described below in relation to other figures, the border rope 306 is firmly fixed within the rope hook 312 by being fixed, pushed into, and then fixed with a hook cover (not shown in FIG. 3) in the hooked portion of the rope hook 312.

[0014] In one embodiment, the rope hook 312 is coupled to the play equipment 314 by welding. However, it is expressly contemplated that other forms of coupling the rope hook 312 to the play equipment 314 may be utilized. By incorporating one or more rope hooks 312, the border rope 306, and thus the net lattice 300, can be secured to and coupled to most play equipment. Those skilled in the art will understand that there are suitable methods other than rope hooks for coupling the net lattice embodiments described herein to play equipment, such as clamping or incorporating eyebolts or other similar connectors (which may or may not require welding).

[0015] Figure 4 is a perspective view of a portion of a net lattice 400. The net lattice 400 includes similarities to the net lattices 100, 200, and 300, and like parts are numbered alike in Figure 4. The net lattice 400 is particularly similar to the net lattice 200 of Figure 2. The net lattice 400 includes one or more net ropes 402 and net clamps 404 configured to form the structure and pattern of the net lattice 400. A border rope 406 supports the outer perimeter of the net lattice 400 as shown. The border rope 406 supports one or more net ropes 402. In one embodiment, the net clamps 404 are arranged and configured to guide the net ropes 402 into a clinch engagement with the border rope 406, and this clinch engagement inhibits or prevents rubbing or other abrading action between the net ropes 402 and the border rope 406. As such, the shape of the openings in the net lattice 400 may or may not be as consistent as the shape of the openings farther from the border rope 406.

[0016] In one embodiment, as shown in FIG. 4, the net rope 402 has no untied ends. Instead, after terminating or transitioning (i.e., looping) one or more times around the border rope 406, it continues in the opposite direction, forming adjacent line segments of the rope 402 within the overall net lattice 400 structure. For example, in one embodiment, a segment of the net rope 412 extends towards the border rope 406, terminates or transitions (i.e., loops) several times (e.g., 2 times) around the border rope 406, and then proceeds in the opposite direction as another segment 414. The segment 412 and the segment 414 are clamped together by the net clamp 404 (depending on the design of the net clamp 404, they may or may not contact each other). This routing of the net rope 402 towards and away from the border rope 406, along with the clamping by the net clamp 404, creates the shape of the net lattice 400 as shown. Having described all of this, it is contemplated that instead of the continuous rope 402 design shown, individual portions of the net rope 402 may be utilized.

[0017] In addition, as shown in FIG. 4, the border rope 406 is fixed to the play equipment 410 by a plurality of rope hooks 408. The rope hooks 408 can be fixed to the play equipment 410, for example, by welding. However, alternatively, it is explicitly contemplated that other means of fixing the rope hooks 408 to the play equipment 410 may be utilized. During operation, the plurality of rope hooks 408 fix the border rope 406 to the play equipment 410, thereby providing sufficient tension and integrity of the net lattice 400 as an essential component of a larger play facility of which the play equipment 410 is a part.

[0018] Figure 5 is a perspective view of a play structure 500 incorporating a net lattice 502. The net lattice 502 is configured to conform to the embodiments of the net lattice described in connection with any of the previous Figures 1 - 4 as shown. As shown, the net lattice 502 generally covers the interior space of the play structure frame 504. A border rope 510 is configured to provide support within the structure of the net lattice 502 and also to facilitate attachment to the play structure frame 504. The border rope 510 is secured to the frame 504 using a plurality of rope hooks 512.

[0019] In one embodiment, the frame 504 includes one or more curved portions 506. In another embodiment, straight portions, such as straight portion 508, are also included. In either case, the border rope 510 is configured to have sufficient flexibility to follow along the perimeter of both the curved portion 506 and the straight portion 508 while maintaining the tension across the entire net lattice 502 as shown. Those skilled in the art will understand that the size, shape, and form of the play structure as well as the corresponding net lattice characteristics may vary depending on the requirements of a given play facility.

[0020] Figure 6 is a perspective view of the rope hook 600. As shown, the rope hook 600 includes a concave portion 602 configured to receive and support a border rope, such as an example of the border rope described above in connection with other figures. The concave portion 602 is, illustratively, of a size sufficient to conform to a border rope that meets the requirements applicable to a given facility. The rope hook 600 further includes a lip portion 604 configured to further secure and hold the border rope within the concave portion 602. Additionally, in one embodiment, the rope hook 600 includes a smooth portion 606 and a corner portion 608 disposed within the concave portion 602. The corner portion 608 is configured to further secure the border rope by applying frictional, digging, or resisting forces to prevent rotation and / or translation of the border rope within the concave portion 602. In one embodiment, the rope hook 600 further includes a surface 610 configured to couple to a desired play structure. As shown, the surface 610 is depicted as generally flat to allow for proper coupling to the play structure. For example, the rope hook 600 can be coupled to the play structure at the surface 610 by welding the surface 610 to the play structure. However, in other embodiments, the surface 610 can be curved in any manner suitable to allow for attachment of the rope hook 600 to the play structure. In one embodiment, the rope hook 600 has a length of approximately 2.25 inches and a relative thickness of approximately 0.5 inches. However, it is expressly contemplated that different lengths and thicknesses may be utilized. Additionally, in one embodiment, the rope hook 600 includes an opening 612. The opening 612 is configured to receive one or more fasteners therein. The fasteners can be used, for example, to secure a hook cover onto the rope hook 600. The fasteners used for the opening 612 can be, for example, bolts, screws, or other fasteners suitable for protruding into the opening 612. In one embodiment, the opening 612 is a threaded opening suitable for a corresponding threaded fastener.

[0021] Figures 7A and 7B are perspective views of hook cover 700. Hook cover 700 includes an inner portion 702 configured to receive a rope hook therein. The rope hook may be, for example, the rope hook 600 described above with respect to FIG. 6. Inner portion 702 includes a first gap 704 configured to facilitate engagement between the lip portion of the rope hook and hook cover 700, and a second gap 706 configured to facilitate engagement between the body portion of the rope hook and hook cover 700. Hook cover 700 can have, in one embodiment, a length of about 2.25 inches, a height of about 1 and 13 / 16 inches, and a width of about 1.125 inches. Additionally, hook cover 700 further includes an opening 708 configured to permit insertion of a fastener therein. When installed, the fastener projects through opening 708 and further through an opening provided in the rope hook to couple hook cover 700 to the rope hook, as shown. The fastener utilized can be, for example, a bolt, screw, or other fastener suitable for projecting through opening 708. In one embodiment, opening 708 is a threaded opening. Additionally, in one embodiment, opening 708 has a diameter of about 0.410 inches. During operation, hook cover 700 is configured to facilitate receipt of the rope hook and to provide a protective barrier against intentional or accidental damage to the rope hook and / or the border rope supported by the rope hook.

[0022] FIG. 8 is a perspective view of a play apparatus 800 incorporating elements described above in relation to other figures. The apparatus 800 includes a net lattice 802 having a plurality of net clamps 804 and one or more border ropes 806. The border ropes 806 are configured to be inserted into and supported by a plurality of rope hooks 808. As shown, each rope hook 808 includes a hook cover. The hook cover corresponds, by way of example, to the hook cover described above with respect to FIGS. 7A and 7B. The illustrated hook cover serves to further secure the border rope 806 to the rope hook 808 and prevent vandalism. Additionally, as shown, the rope hook 808 is configured to be coupled to a frame 810 such that it projects slightly outside of the hook cover and can be fixed, for example, by welding.

[0023] FIGS. 9A - 9B are perspective views of a rope hook coupling assembly 900. The assembly 900 includes a rope hook 902 secured to a hook cover 904. As shown, a border rope 906 is configured to extend through a recessed portion of the rope hook 902 and the hook cover 904 and be fixed in place. The border rope 906 and / or the rope hook 902 are sized such that, by way of example, there is little or no clearance for movement when the border rope 906 is fixed within the recessed portion of the rope hook 902.

[0024] Similarly, FIGS. 9A-9B show a cross-section of the border rope 906. As shown, the border rope 906 includes, as shown, six edge ropes 920 and one rope core 910. However, in another example, a different number of edge ropes and / or rope cores may be utilized. In one embodiment, the rope edges are reinforced, for example, with steel wires. Additionally, in one embodiment, the rope core 910 is a steel core, but can be readily configured with different materials such as polypropylene core materials. In one embodiment, the materials are selected such that it is difficult to tear and / or otherwise damage the border rope 906. In one embodiment, the diameter of the border rope 906 is approximately 20 millimeters (mm). Further embodiments regarding the configuration of the border rope 906 are described below in connection with FIG. 11.

[0025] Assembly 900 further includes one or more fasteners 908 configured to protrude through the opening 912 and secure the hook cover 904 to the rope hook 902. As shown, two fasteners 908 are used, with each fastener applied to opposite sides of the rope hook 902 and the hook cover 904. However, in other embodiments, one fastener may be used with the opening 912. The fastener 908 is, for example, a threaded fastener. However, in other embodiments, other fasteners such as non-threaded fasteners may be used.

[0026] FIG. 10 is a partial view of the net rope 1000. In one embodiment, the net rope 1000 is the net rope used to form the net lattice embodiments described above in connection with other figures. The net rope 1000 includes a plurality of woven rope fibers 1002 that surround a rope core 1004 (itself, difficult to see in FIG. 10 because it is surrounded by a plurality of woven strands 1006). In one embodiment, each woven strand 1006 and / or rope core 1004 is itself a fabric of individual strands. However, here it is useful for the purposes of this detailed description to consider the woven strands 1006 and the rope core 1004 separately as independent elements each.

[0027] As touched upon in the description of the previous figures, one or more net ropes 1000 are joined together using a plurality of net clamps to form a net lattice. The outer woven rope fibers 1002 serve to protect the woven strands 1006 and the rope core 1004 from damage while at the same time providing a comfortable lying place and a functional climbing surface for the play equipment user. Further, the rope fibers 1002 also isolate the play equipment user from the woven strands 1006 and / or rope core 1004 that are relatively sharp, hot, cold, and otherwise unpleasant to touch. In one embodiment, the rope fibers 1002 are formed of braided polyester. However, in other embodiments, another material (such as polyethylene) may be used to form the rope fibers 1002.

[0028] Both the woven strand 1006 and the rope core 1004 are configured to further prevent damage to the one or more net ropes 1000 over time. For example, both the woven strand 1006 and the rope core 1004 reduce the likelihood that the one or more net ropes 1000 will break, cut, tear, or be damaged in any way by an inattentive person. In addition, the relative rigidity of the woven strand 1006 and the rope core 1004 causes the structural integrity and shape of the net lattice to be maintained when the net lattice is not under pressure, but allows for temporary shape changes when the net lattice is under pressure, such as when a user comfortably lies on top of the net lattice. The relative rigidity of the woven strand 1006 and the rope core 1004, in combination with their placement in the rope clamps of the net lattice, results in a degree of shape memory functionality, such that the net lattice deforms under pressure but, when not under pressure, returns partially or fully to its non-deformed shape naturally and automatically.

[0029] FIG. 11 is a cross-sectional view of a net rope 1100 that coincides with the net rope 1000 at all or most points as shown. In other words, in one embodiment, the cross-sectional view is of the net rope 1000. As shown, the net rope 1100 includes an outer layer 1102 composed of 12 (non-limiting) individually woven rope fibers (referred to as rope fibers 1002 in relation to FIG. 10). In one embodiment, the rope fibers of the outer layer 1102 are formed of a polyester material. In another example, the rope fibers may be composed of a fabric or other relatively soft material (i.e., soft compared to the harder material around which it is woven).

[0030] The diameter of the net rope 1100 is defined by the overall diameter of the outer layer 1102. For example, the diameter is about 6.6 millimeters (mm). However, it is expressly contemplated that the net rope 1100 may have a larger or smaller diameter depending on the requirements of a given facility. Diameters in the range of 5 - 18 mm are effective in balancing comfort when lying down and functionality for an engaging climbing experience. A diameter of less than 12 is effective for a shape memory effect where the net lattice shape automatically restores when the pressure is removed (e.g., when a person lying down is present). In one embodiment, the entire net rope 1100 is immersed in a protective material or coated with a protective material to further reduce the possibility of wear and the like. However, such a coating is thin and unlikely to significantly increase the diameter.

[0031] The net rope 1100 also includes an inner layer 1106 composed of six (non - limiting) individually braided strands (referred to as woven strands 1006 in FIG. 10) made of a harder material such as a metallic material. The inner layer 1106 may also be immersed in a thin protective layer or coated with a thin protective layer. The inner layer 1106 provides resistance to damage and acts of vandalism. In one embodiment, the twist length of the braided strands in this layer is about 23 mm. However, it is expressly contemplated that different twist lengths may be selected depending on the requirements of a given application.

[0032] Finally, the net rope 1100 further includes a rope core 1104 (referred to as rope core 1004 in FIG. 10) disposed inside the outer layer 1102 and the inner layer 1106. The diameter of the rope core 1104 is, by way of example, about 2.25 mm, but different diameters may be preferred if given the requirements of a given facility. The rope core 1104 is configured to facilitate maintaining the structural integrity of the net lattice while at the same time preventing damage to the net rope over time. For example, the rope core 1104 minimizes the possibility of rope breakage and the like.

[0033] In one embodiment, the rope core 1104 is formed from a metallic material such as steel. In another embodiment, the rope core 1104 is formed from a polymeric material. In yet another embodiment, the rope core 1104 includes a plurality of individual elements (e.g., strands of steel or stainless steel) wound together. In that case, a woven twist length of about 18 mm is illustratively suitable. However, it is expressly contemplated that the rope core 1104 may include different diameters and twist lengths based on the desired thickness and length of the net rope 1100.

[0034] FIG. 12 is a cross-sectional view of a border rope 1200 that illustratively corresponds to an embodiment of the border rope described above in connection with other figures. As shown, the border rope 1200 includes six edge rope elements 1202 (one exemplary one labeled) woven onto a border rope core 1204.

[0035] Each edge rope element 1202 is internally reinforced, as shown, with a plurality of woven internal wires 1206 that themselves surround a core element. The core element of each rope element 1202 can illustratively be a single elongated element (e.g., made of a metallic or polymeric material) or can itself be a plurality of woven together elongated elements (e.g., woven metal wires). In one embodiment, each edge rope element 1202 includes seven to nine internal wires 1206 (e.g., galvanized steel wires) woven around the core for reinforcement. In one embodiment, the weave of the internal wires 1206 has a twist length of about 34 mm. Additionally, in one embodiment, each edge rope element 1202 is covered with a fabric of fabric elements such as a mesh weave of polyester yarns. Each edge rope element 1202 illustratively has a diameter of about 6.6 mm.

[0036] The border rope core 1204 is, by way of example, formed of a metallic material such as steel. In this way, the possibility of cutting and / or otherwise damaging the border rope 1200 is minimized. In one embodiment, as illustrated, the border rope core 1204 is composed of a fabric of internal wires 1208 surrounding a central core. For example, the border rope core 1204, by way of example, includes a fabric of six internal wires 1208 around a core of metal, polymer or woven metal. In one embodiment, each wire 1208 is formed of steel, stainless steel or galvanized steel. Additionally, in one embodiment, the border rope core 1204 is optionally covered with a fabric of fabric elements such as a mesh fabric of polyester yarns.

[0037] FIG. 13 is a flow diagram showing an exemplary process 1300 for forming a net lattice using one or more net ropes, and embodiments of the net lattice and net ropes are described above in connection with other figures. Operation 1300 begins at 1310, where the rope segment length parameter is adjusted. Adjusting the rope segment length parameter includes, by way of example, adjusting successive clamp pairs within a clamp tightening system. Each clamp pair, by way of example, creates a corresponding length of net rope. Thus, adjusting the clamp pairs includes selecting a successive series of net rope lengths. For example, the net lattice shown in FIG. 5 follows a curved play frame, and as such, it is desirable to select different adjacent net rope lengths for different length measurements. Thus, setting the segment length parameter in accordance with block 1310 means setting the clamp pairs to correspond to the desired successive net rope lengths.

[0038] Next, step 1300 proceeds to 1320 where the net rope is secured within the clamp system. In one embodiment, this means securing a length of the net rope within the pair of clamps. As such, each pair of clamps creates and holds the desired net rope length. In one embodiment, a single stretch of the net rope is extended lengthwise across a plurality of successive pairs of clamps, thereby covering a plurality of successive net rope lengths. For example, the segment 412 of the net rope described in relation to FIG. 4 is secured within one pair of clamps and the next adjacent segment 414 of the net rope is secured within the next pair of clamps. And so on, subsequently.

[0039] Next, the process proceeds to 1330 where a plurality of net clamps, described above in relation to other embodiments, are arranged to receive adjacent net rope segments, each secured within its own pair of clamps. The net clamps are arranged, illustratively, such that a desired pattern of the net lattice is created when secured to adjacent net rope segments. For example, the net clamps are arranged, illustratively, to ultimately secure together the segments of net ropes 412 and 414.

[0040] Finally, the process ends at 1340 by simultaneously applying compression to the plurality of net clamps to crimp them into the successive net rope segments, thereby permanently achieving the desired net lattice shape. In one embodiment, all of the net clamps for a single pair of adjacent stretches of the net rope are arranged and crimped all together at once. In another embodiment, the net clamps for a plurality of adjacent stretches of the net rope are arranged and crimped simultaneously. Those skilled in the art will understand that any combination of the plurality of net clamps can be arranged and crimped simultaneously.

[0041] Figures 14A - 14B (collectively Figure 14) are perspective views of the net clamp 1600. The net clamp 1600 is a two - sided hook (one hook on each side) for receiving segments of the net rope (e.g., segments 412 and 414 shown in Figure 4) on each side. As shown, the segments of the net rope do not contact each other, but their respective central - axis lines are arranged in a common plane. In some embodiments, the net clamp is configured such that the segments contact each other. Depending on the requirements of a given application, either method is acceptable.

[0042] Each net clamp 1600, as shown, includes first and second recessed portions 1602 configured to allow insertion of the net - rope segments. The recessed portions 1602 can be sized to finally fix the net - rope segments with little or no room to move after crimping. The net hook 1600 further includes one or more teeth 1604 for providing anti - slip after crimping. Additionally, barbs 1606 are optionally provided to further prevent the net - rope segment from slipping once it is crimped into the recessed portion 1602.

[0043] Figure 14B of the net clamp 1600 actually shows the barbs 1606 with the teeth 1604 removed for clarity. Either or both of the features 1604 and 1606 can be included in the design of the net clamp 1600, or neither can be included. Generally, it is desirable to prevent slipping and / or rotation of the net - rope segments, and the features 1604 / 1606 serve this purpose. Additionally, both sides of each net clamp 1600 further include a first lip portion 1608 and a second lip portion 1610, which are configured to compress and fix the net - rope segments together within the recessed portion 1602. This is substantially the crimping of the clamp 1600. In one embodiment, the net clamp 1600 has a length of about 15 / 16 inches, a height of about 11 / 16 inches, and a relative thickness of about 1 / 4 inch.

[0044] FIG. 15 is a perspective view showing a portion of a play apparatus 1700 including a net lattice 1702 coupled to a frame 1708 as shown. The purpose of FIG. 15 is to demonstrate that there are methods for coupling to a play apparatus other than rope hooks. For example, as shown in FIG. 15, a clamp tightening mechanism 1704 is utilized to secure the net lattice 1702 to the frame 1708. In another example, one or more eye bolts 1706 are implemented to secure the net lattice 1702 to the frame 1708. These are merely examples of other possible connections suitable for coupling the net lattice 1702 to the frame 1708.

[0045] Embodiments of the net ropes described herein, including the net rope 1000 of FIG. 10, are configured to include an outer layer (e.g., the woven rope fibers 1002 of FIG. 10) and an inner layer (e.g., the woven strands 1006 of FIG. 10) as shown. In one embodiment, the outer layer is relatively soft as it is substantially composed of, for example, a fabric material, and the inner layer is harder as it is substantially composed of, for example, a metal material. And an inner core (e.g., the core 1004 of FIG. 10) extends through the centers of both the outer and inner layers. These three layers interact together to support easy movement of the net rope segments relative to each other while maintaining the long-term shape and structural integrity of the net lattice. The interaction between the layers of the net rope, in combination with the placement of the net clamps, causes the shape of the spaces in the net lattice (e.g., the space 106 referenced in relation to FIG. 1) to be retained in the long term even when temporarily deformed, such as when the net lattice is placed under pressure by a user.

[0046] In one embodiment, as described, the inner layer of the net rope (e.g., the woven strand 1006 of FIG. 10) includes a fabric of six metal elements around a hidden central core. Each of the six metal elements is actually, in itself, a fabric of seven smaller individual strands. Thus, in this case, a total of 42 strands are utilized in the inner layer (excluding the central core that is inside the inner layer). In another example, more than 42 strands are utilized in the inner layer. In this way, a thicker and harder inner layer is formed, providing further protection for the central core and increasing the overall rigidity of the net rope. In one embodiment, the central core inside the inner layer is formed of a rigid and flexible material. For example, the central core may be an elongated polymer element. It can be utilized just as easily as a metal element or a fabric of metal elements themselves.

[0047] The outer layer of the net rope (e.g., the woven rope fiber 1002 of FIG. 10) is exemplary effective in mitigating environmental conditions such as temperature changes. Also, it has a relatively soft touch. In addition, the outer layer exemplary provides insulation and isolation of the user from the more temperature-sensitive inner layer. The outer layer is exemplary formed from any of a number of materials. Examples of such materials include polymer yarns, elastomeric materials, nylon, plastics or other materials suitable for retaining the aforementioned characteristics of the net rope. In one example, an adhesive is applied to the outside of the inner layer to support the connection of the inner layer to the outer layer and further contribute to the insulation of the outer layer of the net rope.

[0048] In some examples, the net ropes described herein have a diameter of about 6.6 millimeters. However, in other examples, different diameters can also be utilized. For example, a diameter smaller than 6.6 millimeters can be utilized. In this case, it is probably best to narrow the spacing between rows or columns of net clamps in the net lattice. The reduction in spacing promotes the optimization of the performance and durability advantages of the net lattice described herein. Additionally, a diameter larger than 6.6 millimeters can also be utilized. In this case, it is probably best to widen the spacing between net clamps in the net lattice in order to promote the optimization of the same performance and durability advantages.

[0049] It should be noted that the net ropes described herein do not necessarily have to be round or circular in all cases. Geometric shapes other than round or circular are possible. For example, the net ropes can be manufactured in a square, diamond, hexagonal, elliptical or other shape profile preferred for a given net lattice design. In one example, the breaking strength of the net rope is at least about 650 kilograms regardless of its shape.

[0050] As already mentioned, the shape of the spaces in the net lattice (e.g., space 106 referred to in connection with FIG. 1) does not necessarily have to be the same as or similar to the shape shown. The net clamp structure can be adjusted to support various net lattice spaces, such as square, rectangular, triangular, etc. Most of the shapes within a given net lattice pattern are formed by combinations of four net clamps. However, in some examples, fewer or more net clamps can be integrated to form various net lattice spaces. In one example, the perimeter of each net lattice space formed within the net lattice is 20 inches or less. In this way, the net spaces are large enough to support grasping and / or climbing while preventing hands from passing through the openings of the net lattice.

[0051] As shown above in connection with the drawings, the spaces in the net lattice (e.g., space 106 referenced in connection with FIG. 1) are formed using one or more net clamps. A net clamp is, by way of example, a crimp-type connector that gathers segments of net ropes extending parallel to each other. In one embodiment, the net lattice includes at least three net clamps arranged in a row horizontally or vertically with respect to each other. The use of net clamps makes it possible to avoid the situation where net ropes overlap each other, which is common in conventional rope-type climbing play equipment. Also, the net clamps described herein allow the net ropes and clamp connectors to remain in an aligned state that is substantially parallel to each other (i.e., in the same plane). In one example, the net clamp surrounds approximately 100% of the net rope cross-sectional thickness and does not form a closed geometric shape. The net clamp closes around the net rope, compressing the outer covering of the net rope to minimize slippage.

[0052] In addition to forming the net lattice, the net clamps are configured to adhere to the net ropes to prevent and / or minimize damage to the net lattice structure. In one example, the minimum load-bearing capacity of the net lattice is 20 pounds per square foot. Further, each net clamp can be manufactured to have an internal barb mechanism configured to grip the net rope to further prevent slippage of the net rope. Each net clamp is configured to apply friction to the net rope, and that friction prevents and / or minimizes slippage when the net clamp is coupled to the net rope. In one example, the net clamp has a minimum slip resistance of 200 pounds sufficient to hold and secure the net rope.

[0053] In one example, the net ropes described herein used to form the net lattice include a kink-preventing wrap surrounding a polymer core. For example, when the net rope is bent at an angle of approximately 180°, the net rope resists wrinkling and / or kinking from the applied force.

Claims

Claim 1 A play apparatus comprising a net lattice, first and second segments of a net rope, the net rope being part of the net lattice and comprising an outer layer of fabric surrounding an inner layer of fabric, the net lattice being attached directly or indirectly to the play apparatus, the first and second segments of the net rope; a net clamp that is part of the net lattice, the first and second segments of the net rope extending substantially parallel to each other through the net clamp, the net clamp fixing the first segment of the net rope to the second segment of the net rope where the first and second segments of the net rope extend substantially parallel to each other; and a play apparatus comprising the same. Claim 2 The play apparatus according to claim 1, wherein the net clamp fixes the first segment of the net rope to the second segment of the net rope where the first and second segments of the net rope extend substantially parallel to each other, and the first and second segments of the net rope do not contact each other within the net clamp. Claim 3 The play apparatus according to claim 1, wherein the first and second segments of the net rope are each part of a single continuous stretch of the net rope. Claim 4 The play apparatus according to claim 1, wherein the outer layer of the fabric is an outer layer of woven fabric. Claim 5 The play apparatus according to claim 1, wherein the inner layer of the fabric is an inner layer of metal fabric. Claim 6 The play apparatus according to claim 1, wherein the outer layer of the fabric is a woven fabric layer and the inner layer of the fabric is a metal fabric layer. Claim 7 The play apparatus according to claim 1, wherein the inner layer of the fabric is composed of a material that absorbs heat more quickly than any material included in the outer layer of the fabric. Claim 8 The play apparatus according to claim 1, further comprising a second net clamp that is also part of the net lattice, the first and second segments of the net rope extending substantially parallel to each other through the second net clamp, the second net clamp also fixing the first segment of the net rope to the second segment of the net rope. Claim 9 A play apparatus comprising a net lattice, a single continuous elongated net rope comprising an inner layer of material covered with an outer layer of soft fabric, the inner layer being harder than the outer layer of soft fabric; A plurality of rope clamps, each attaching a first portion of the one continuous elongated net rope to a second portion of the one continuous elongated net rope A play equipment including the above components

10. The play equipment according to claim 9, wherein the plurality of rope clamps are a plurality of crimping clamps, each of which crimps onto the first and second portions of the one continuous elongated net rope

11. The play equipment according to claim 9, wherein the inner layer of the material is a set of elongated metal elements woven together

12. The play equipment according to claim 9, wherein the plurality of rope clamps are a plurality of two-sided clamps, each configured to receive the first portion on one side and the second portion on the other side

13. The play equipment according to claim 9, wherein the plurality of rope clamps are at least three series of rope clamps all aligned with each other

14. The play equipment according to claim 9, wherein the plurality of rope clamps are at least three series of rope clamps included in the net lattice, all aligned horizontally or vertically with each other

15. The play equipment according to claim 9, wherein the inner layer of the material is a set of at least 42 separate woven metal strands

16. A play equipment incorporating a net lattice, the net lattice including a plurality of net clamps that repeatedly align or misalign a first elongated segment of a net rope parallel to a second elongated segment of the net rope, wherein the first and second elongated segments of the net rope are composed of a plurality of fabric material layers

17. The play equipment according to claim 16, wherein the first and second elongated segments of the net rope each include an elongated segment of a conductive fabric material covered with a fabric insulating material

18. The play equipment according to claim 16, wherein the first and second elongated segments are part of the same net rope

19. The play equipment according to claim 16, wherein the first and second elongated segments are part of separate net ropes

20. The play apparatus according to claim 16, wherein the plurality of net clamps align the first elongated segment of the net rope parallel to the second elongated segment of the net rope at least three times in a row, or cause the state not to be so, creating a series of repeating openings between the first elongated segment of the net rope and the second elongated segment of the net rope.

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