Flexible net components for playground 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] The design of components for incorporation into play equipment presents unique challenges. The fact that play equipment is prone to delayed maintenance and sometimes takes years between part replacements should be taken into account. In addition, optimizations to avoid injuries caused by falls, for example, should be considered. Play equipment components should also be designed to withstand extreme environmental considerations, often snow and ice in winter, followed by extreme heat and rainfall in spring and summer. Furthermore, the fact that play equipment components are often used by children with little or no adult supervision should be considered. Finally, many, if not most, play equipment components are left exposed in an unsupervised state and are vulnerable to vandalism. When these and other factors are at play, a skilled designer is required to create desirable play equipment components. There is a constant need for well-designed components that play equipment designers can confidently select.

Summary of the Invention

Means for Solving the Problems

[0002] Embodiments of play equipment including a net grid are disclosed. The net grid is attached directly or indirectly to the play equipment. First and second segments of a net rope are part of the net grid and comprise an outer woven net rope layer surrounding an inner woven net rope layer. A net clamp is also part of the net grid. 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 segment of the net rope and the second segment of the net rope extend substantially parallel to each other.

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

Brief Description of the Drawings

[0004] [Figure 1] This is a perspective view of a portion of the network grid. [Figure 2] This is a perspective view of a portion of the network grid. [Figure 3] This is a perspective view of a portion of the network grid. [Figure 4] This is a perspective view of a portion of the network grid. [Figure 5] This is a perspective view of the playground equipment. [Figure 6] This is a perspective view of a rope hook. [Figures 7A-7B] This is a perspective view of the hook cover. [Figure 8] This is a perspective view of the playground equipment. [Figure 9A-9B] This is a perspective view of a rope hook coupling assembly. [Figure 10] This is a partial view of the net rope. [Figure 11] This is a cross-section of a net rope. [Figure 12] This is a cross-section of a border rope. [Figure 13] This is a flowchart illustrating the process of forming a net grid. [Figure 14A-14B] This is a perspective view of a net clamp. [Figure 15] This is a perspective view of a part of the playground equipment. [Modes for carrying out the invention]

[0005] Detailed description of exemplary embodiments As playground equipment becomes more diverse and enjoyable, net-type components have become increasingly common. Ideally, for many types of playground equipment, net-type components should comfortably accommodate a large number of users of varying body sizes. Furthermore, ideally, net-type components should exhibit long-term strength and durability. The embodiments described herein address these and other design considerations relating to net-type playground equipment components.

[0006] Figure 1 is a perspective view of a portion of the net grid 100. The net grid 100 includes one or more net ropes 102 that are at least substantially uniformly distributed to form the net grid 100, as shown in the figure. The net ropes 102 may include a plurality of separate net rope segments, for example, segments of the same or different lengths, or it may be a single continuous net rope 102 having a length sufficient to form some or all of the net grid 100.

[0007] The net grid 100 also includes a plurality of net clamps 104, as shown in the illustration. As shown in the illustration, the network of net clamps 104 is arranged at least substantially uniformly. For example, as shown in Figure 1, there is a group of net clamps 104 formed in a straight line horizontally (rows of clamps in the left-right direction in Figure 1), and then a group of net clamps 104 formed in a straight line vertically (rows of clamps in the up-down direction in Figure 1). Each net clamp 104 pulls two portions of net rope 102 together to form a visually appealing pattern characteristic of the net grid 100. As will be described in more detail below, in one embodiment, the net clamps 104 are configured to fix portions of net rope 102 adjacent to each other (depending on the design of the net clamp 104, they may or may not be in contact) by a crimping engagement between the net clamp 104 and the portion of net rope 102. However, it is explicitly considered that other forms of fixing portions of net rope 102 together (e.g., welding) may be utilized.

[0008] As shown in Figure 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 space thus formed in the net grid 100 is designated by reference numeral 106 in Figure 1. However, this space 106 is repeated throughout most of the net grid 100 as a result of the substantially uniform distribution of the net clamps 104 into aligned columns and rows. The spaces 106 formed in the grid 100 can be modified, exemplarily, by changing the relative arrangement of the net clamps 104. For example, by reducing the spacing between consecutive columns or rows of net clamps 104, the size of adjacent net spaces 106 is reduced. Naturally, theoretically, increasing the spacing between consecutive columns or rows of net clamps 104 will increase the size of adjacent net spaces 106. Furthermore, the net clamps 104 do not need to be consistently aligned into columns or rows. The distribution of the net clamps 104 can be organized into an infinite number of combinations to create consistent or inconsistent spaces 106 throughout the entire net grid 100. In other examples, the net clamps 104 are inconsistently separated at one or more locations, thereby causing 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 easily varied in a way that is organized consistently or inconsistently, depending on the requirements of a given application.

[0009] The attachment of the net clamps 104 to the portions of the net rope 102, as shown in the figure, ensures that the elongated central axis of the net rope 102 is permanently fixed in a common plane (within each net clamp 104). However, net clamps 104 adjacent to each other in 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. Given the scheme for connecting the portions of the net rope 102 together, the net grid 100 as a whole is configured to respond by conforming its shape to accept any applied weight or pressure. In one embodiment, which will be described in more detail below in relation to other drawings, the net rope 102 is also constructed with a rigid yet flexible design so that when the weight or pressure is released, the net grid regains 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 conformation to the user's body. When the user leaves the net lattice 100, the net lattice automatically recovers some or all of the shape and form it had before the user sat on it. Thus, the net lattice 100 promotes both a safe play structure for convenient climbing and elasticity for comfortable lying (all while maintaining the desirable aesthetic features of the lattice).

[0010] Figure 2 is a perspective view of a portion of the net grid 200. The net grid 200 includes similarities to the net grid 100 of Figure 1, and in Figure 2, similar parts are numbered similarly. One or more net ropes 202 are connected together at various positions using net clamps 204 to form the net grid 200, as shown. The net grid 200 further includes border ropes 206 arranged along the outer perimeter of the net grid 200 to provide support and maintain tension. The border ropes 206 have a larger diameter than one or more net ropes 202, as shown. The border ropes 206 are configured to support loop portions of the net ropes 202. As such, the border ropes 206 provide termination or transition points 208 for one or more portions of the net ropes 202. The termination or transition point 208 may include any number of loops around the border ropes 206. However, for many applications, a small number of loops, such as one to three, can provide adequate structural integrity without unnecessarily adding further material costs.

[0011] As also shown in Figure 2, in one embodiment, a transition loop 210 is provided formed in one or more net ropes 202 to further facilitate attachment or transition in the border rope 206. In one embodiment, the distal free ends of one or more net ropes 202 are fixed to the end or transition point 208 or near thereto. However, in another embodiment, the net rope 202 is fixed and transitioned at point 208 without incorporating a free end. Rather, the net rope 202 is transitioned (formed into a loop) one or more times around the border rope 206 (with or without incorporating 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 constructed from a single stretch of net rope 202. In addition, as shown in Figure 2, the transition loop 210 and / or any portion of the net rope 202 can be further fixed and / or oriented using one or more additional net clamps 204A, as optional. In this way, the unraveling of the end or transition section 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 grid 300. The net grid 300 includes similarities with the net grids 100 and 200, and in Figure 3, similar parts are numbered similarly. The net grid 300 is particularly similar to the net grid 200 in Figure 2. The net grid 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 grid 300. The net grid 300 further includes a border rope 306. A portion of the net rope 302 is routed to form several rope loops 310 (only one representative is marked), and the rope loops 310 are formed adjacent to where the portion of the net rope 302 is looped around the border rope 306 to form several terminations or transitions at termination or transition points 308. For example, the marked rope loop 310 terminates or transitions twice around the border rope 306 as shown and is secured in place by several additional net clamps 304A as shown. However, in other examples, more or fewer loops may be used around the border rope 306. In this way, unraveling of the end or transition section of the net rope 302 around the border rope 306 is mechanically prevented.

[0013] One difference with respect to the net grid 300 is the inclusion of rope hooks 312 to facilitate securing the border rope 306 to the play equipment 314. The rope hooks 312 are configured to support the border rope 306 within the hook-fastening portion of the rope hook 312, as shown in the figure. By supporting the border rope 306, the rope hooks 312 help maintain tension throughout the net grid 300. In one example, the rope hooks 312 can be compressed or crimped around the border rope 306. In another example, for example, in the example described below in relation to other figures, the border rope 306 is firmly secured within the rope hooks 312 by fastening, pushing into the hook-fastening portion of the rope hooks 312 and then securing it with a hook cover (not shown in Figure 3).

[0014] In one embodiment, the rope hook 312 is joined to the play equipment 314 by welding. However, it is explicitly considered that other forms of joining the rope hook 312 to the play equipment 314 may be used. By incorporating one or more rope hooks 312, the border rope 306 and, consequently, the net grid 300 can be fixed and joined to most play equipment. Those skilled in the art will understand that there are other suitable methods for joining the net grid embodiments described herein to play equipment, such as clamp fastening or the incorporation of eye bolts or other similar connectors (which may or may not require welding).

[0015] Figure 4 is a perspective view of a portion of the net grid 400. The net grid 400 includes similarities with the net grids 100, 200, and 300, and in Figure 4, similar parts are numbered similarly. The net grid 400 is particularly similar to the net grid 200 in Figure 2. The net grid 400 includes one or more net ropes 402 and net clamps 404 configured to form the structure and pattern of the net grid 400. Border ropes 406 support the outer perimeter of the net grid 400, as shown. Border ropes 406 support one or more net ropes 402. In one embodiment, net clamps 404 are positioned and configured to guide the net ropes 402 into a clinch engagement with the border ropes 406, which suppresses or prevents friction or other abrasive action between the net ropes 402 and the border ropes 406. As such, the shape of the openings in the net grid 400 may or may not be as consistent as the shape of the openings further away from the border rope 406.

[0016] In one embodiment, as shown in Figure 4, the net rope 402 has no untied end, but instead terminates or transitions (i.e., forms a loop) one or more times around the border rope 406, and then continues in the opposite direction, forming adjacent line segments of the rope 402 within the entire net grid 400 structure. For example, in one embodiment, the net rope Pu segment412 extends toward the border rope 406, terminates or transitions (i.e., forms a loop) several times (for example, 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 (they may or may not be in contact with each other depending on the design of the net clamp 404). This routing of the net rope 402 toward and away from the border rope 406, along with the clamping by the net clamp 404, creates the shape of the net grid 400 as illustrated. Having described all of this, it is contemplated that individual portions of the net rope 402 may be utilized in place of the illustrated continuous rope 402 design.

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

[0018] FIG. 5 is a perspective view of a play equipment 500 incorporating a net grid 502. As illustrated, the net grid 502 is configured to conform to the net grid embodiments described in connection with any of the preceding FIGS. 1 to 4. As illustrated, the net grid 502 generally covers the interior space of the play equipment frame 504. A border rope 510 is configured to provide support within the structure of the net grid 502 and to facilitate coupling to the play equipment 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 sections 506. In another embodiment, straight sections, such as a straight section 508, are also included. In either case, the border rope 510 is configured to be flexible enough to follow the circumference of both the curved sections 506 and the straight sections 508 while maintaining tension throughout the net grid 502, as shown in the illustration. Those skilled in the art will understand that the size, shape and form of the playground equipment and the corresponding net grid features may vary depending on the requirements of a given playground facility.

[0020] Figure 6 is a perspective view of the rope hook 600. As shown, the rope hook 600 includes a recessed portion 602 configured to accommodate and support a border rope, for example, the border ropes described above in relation to other figures. The recessed portion 602 is, exemplary, large enough to accommodate 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 recessed portion 602. In addition, in one embodiment, the rope hook 600 includes a smooth portion 606 and an angular portion 608 located within the recessed portion 602. The angular portion 608 is configured to further secure the border rope by applying a frictional force, a digging force or a drag force to prevent rotation and / or translation of the border rope within the recessed portion 602. In one embodiment, the rope hook 600 further includes a surface 610 configured to be coupled to a desired playground equipment. As shown, the surface 610 is generally depicted as flat to allow for a suitable coupling to the playground equipment. For example, the rope hook 600 can be attached to the playground equipment by welding the surface 610 to the playground equipment. However, in other embodiments, the surface 610 may be curved in any way suitable to allow the rope hook 600 to be attached to the playground equipment. In one embodiment, the rope hook 600 has a length of about 2.25 inches and a relative thickness of about 0.5 inches. However, it is explicitly considered that different lengths and thicknesses may be used. In addition, 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 on the rope hook 600. The fasteners used in the opening 612 may 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 the corresponding threaded fastener.

[0021] Figures 7A and 7B are perspective views of the hook cover 700. The hook cover 700 includes an inner portion 702 configured to receive a rope hook inside. The rope hook may be, for example, the rope hook 600 described with respect to Figure 6. The inner portion 702 includes a first gap 704 configured to facilitate engagement between the lip portion of the rope hook and the hook cover 700, and a second gap 706 configured to facilitate engagement between the body portion of the rope hook and the hook cover 700. In one embodiment, the hook cover 700 may have a length of about 2.25 inches, a height of about 1 and 13 / 16 inches, and a width of about 1.125 inches. In addition, the hook cover 700 further includes an opening 708 configured to allow the insertion of a fastener into it. When installed, the fastener protrudes through the opening 708 and, further, through an opening provided in the rope hook, as shown, to connect the hook cover 700 and the rope hook. The fasteners used may be, for example, bolts, screws, or other fasteners suitable for protruding through the opening 708. In one embodiment, the opening 708 is a threaded opening. In addition, in one embodiment, the opening 708 has a diameter of approximately 0.410 inches. During operation, the hook cover 700 is configured to facilitate the housing 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] Figure 8 is a perspective view of playground equipment 800 incorporating the elements described above in relation to other figures. The device 800 includes a net grid 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 is, exemplary, consistent with the hook cover described above in relation to Figures 7A and 7B. The illustrated hook cover serves to further secure the border rope 806 to the rope hook 808 and to prevent vandalism. In addition, as shown, the rope hooks 808 protrude slightly outside the hook cover so that they can be coupled to a frame 810, for example, by welding.

[0023] Figures 9A-9B are perspective views of the rope hook coupling assembly 900. The assembly 900 includes a rope hook 902 fixed to a hook cover 904. As shown, a border rope 906 extends through a recess in the rope hook 902 and the hook cover 904 to be fixed in place. The border rope 906 and / or the rope hook 902 are sized, exemplary, such that there is little to no gap for the border rope 906 to move when it is fixed within the recess in the rope hook 902.

[0024] Similarly, Figures 9A and 9B show cross-sections of the border rope 906. As shown, the border rope 906 includes 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 used. In one embodiment, the rope edges are reinforced with, for example, steel wire. In addition, in one embodiment, the rope core 910 is a steel core, but it can easily be constructed from a different material such as a polypropylene core material. In one embodiment, the material is selected so that the border rope 906 is difficult to tear and / or otherwise damage. In one embodiment, the diameter of the border rope 906 is approximately 20 millimeters (mm). Further embodiments relating to the construction of the border rope 906 will be described below with reference to Figure 11.

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

[0026] Figure 10 is a partial view of the net rope 1000. In one embodiment, the net rope 1000 is a net rope used to form the net grid embodiment described above in relation to other figures. The net rope 1000 includes a plurality of woven rope fibers 1002 surrounding a rope core 1004 (which is difficult to see in Figure 10 because it is itself 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, it is useful for the intent of this detailed description to consider the woven strands 1006 and rope core 1004 as separate and independent elements.

[0027] As described in the previous diagram, one or more net ropes 1000 are joined together using multiple net clamps to form a net grid. The outer woven rope fibers 1002 serve to protect the woven strands 1006 and rope core 1004 from damage, while also providing a comfortable place to lie down and a functional climbing surface for playground equipment users. Furthermore, the rope fibers 1002 also isolate playground equipment users from the woven strands 1006 and / or rope core 1004, which 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, a different material (e.g., 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 one or more net ropes 1000 over time. For example, both the woven strand 1006 and the rope core 1004 reduce the likelihood that one or more net ropes 1000 will completely break, snap, tear, or be damaged in any way by a careless person. In addition, the relative stiffness of the woven strand 1006 and the rope core 1004 ensures that the structural integrity and shape of the net grid are maintained when the net grid is not under pressure, but allows for temporary deformation when the net grid is under pressure, for example, when a user comfortably lies on it. The relative stiffness of the woven strand 1006 and the rope core 1004, in combination with their arrangement in the rope clamps of the net grid, produces a degree of shape memory function, so that the net grid deforms under pressure but naturally and automatically returns to its non-deformed shape, partially or completely, when not under pressure.

[0029] Figure 11 is a cross-sectional view of a net rope 1100 that coincides in all or most respects with a net rope 1000 as shown. In other words, in one embodiment, the cross-sectional view is a cross-section 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 Figure 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., softer than the stiffer material around which it is woven).

[0030] The diameter of the net rope 1100 is defined by the total diameter of the outer layer 1102. For example, the diameter is approximately 6.6 millimeters (mm). However, it is explicitly considered 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 to 18 mm are effective in balancing comfort when lying down with functionality for an engaging climbing experience. Diameters less than 12 mm are particularly effective for a shape memory effect, where the net grid shape automatically returns to its original state when pressure is removed (e.g., when a person is lying down). In one embodiment, the entire net rope 1100 is immersed in or coated with a protective material to further reduce the possibility of abrasion, etc. However, such coatings are 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 Figure 10) made of a harder material such as metal. The inner layer 1106 may also be immersed in or coated with a thin protective layer. The inner layer 1106 provides resistance to damage and vandalism. In one embodiment, the twist length of the braided strands in this layer is approximately 23 mm. However, it is explicitly considered 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 (referenced as rope core 1004 in Figure 10) positioned inside the outer layer 1102 and inner layer 1106. The diameter of the rope core 1104 is exemplary 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 the maintenance of the structural integrity of the net grid while simultaneously preventing damage to the net rope over time. For example, the rope core 1104 minimizes the possibility of rope breakage.

[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 polymer 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 exemplary. However, it is explicitly considered 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] Figure 12 is a cross-sectional view of a border rope 1200 that is exemplary to the embodiment of the border rope described above in relation to other figures. As shown, the border rope 1200 includes six edge rope elements 1202 (one exemplary is labeled) woven on a border rope core 1204.

[0035] Each edge rope element 1202 is reinforced from within by a plurality of woven internal wires 1206 surrounding a core element, as shown in the figure. The core element of each rope element 1202 can be, exemplary, a single elongated element (e.g., made of metal or polymer material) or it can be a plurality of woven elongated elements (e.g., woven metal wire). In one embodiment, each edge rope element 1202 includes seven to nine internal wires 1206 (e.g., galvanized steel wire) woven around the core for reinforcement. In one embodiment, the fabric of the internal wires 1206 has a twist length of about 34 mm. In addition, in one embodiment, each edge rope element 1202 is covered with a fabric element fabric, such as a mesh fabric of polyester yarn. Each edge rope element 1202 has a diameter of about 6.6 mm, exemplary.

[0036] The border rope core 1204 is exemplary, 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 shown, the border rope core 1204 consists of a fabric of internal wires 1208 surrounding a central core. For example, the border rope core 1204 exemplary 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. In addition, in one embodiment, the border rope core 1204 is optionally covered with a fabric of a fabric element such as a mesh fabric of polyester yarn.

[0037] Figure 13 is a flowchart showing an exemplary process 1300 for forming a net grid using one or more net ropes, and embodiments of the net grid and net ropes are described above in relation to other figures. Work 1300 begins at 1310, where the rope segment length parameter is adjusted. Adjusting the rope segment length parameter involves, exemplary, adjusting a series of clamp pairs in a clamp tightening system. Each clamp pair produces, exemplary, a corresponding length of net rope. Thus, adjusting the clamp pairs involves selecting a series of consecutive net rope lengths. For example, the net grid shown in Figure 5 follows a curved playground frame, and as such, it is desirable to select different adjacent net rope lengths for different length measurements. Thus, setting the segment length parameter according to block 1310 means setting the clamp pairs to correspond to the desired series of net rope lengths.

[0038] Next, step 1300 proceeds to 1320, where the net rope is secured in the clamping system. In one embodiment, this means securing a length of the net rope in a pair of clamps. In such a case, each pair of clamps creates and holds a desired length of net rope. In one embodiment, a single stretch of net rope is stretched back and forth over a plurality of consecutive pairs of clamps, thereby covering a plurality of consecutive lengths of net rope. For example, segment 412 of the net rope described in relation to Figure 4 is secured in one pair of clamps, and the next adjacent segment 414 of the net rope is secured in the next pair of clamps, and so on.

[0039] Next, the process proceeds to step 1330, where the multiple net clamps described above in relation to other embodiments are arranged such that each receives an adjacent net rope segment fixed in its own clamp pair. The net clamps are arranged, exemplary, so that a desired pattern of the net grid is created when fixed to adjacent net rope segments. For example, the net clamps are arranged, exemplary, so that they ultimately fix the segments of net ropes 412 and 414 together.

[0040] Finally, the process ends with applying compression to multiple net clamps simultaneously, crimping them into a continuous net rope segment, thereby permanently achieving a desirable net grid shape. In one embodiment, all net clamps are positioned for a single pair of adjacent stretches of net rope and crimped together all at once. In another embodiment, net clamps are positioned and crimped simultaneously for multiple adjacent stretches of net rope. Those skilled in the art will understand that any combination of multiple net clamps can be positioned and crimped simultaneously.

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

[0042] Each net clamp 1600 includes first and second recesses 1602 configured to allow the insertion of net rope segments, as shown in the figure. The recesses 1602 may be sized to ultimately secure the net rope segments with little to no room for movement after crimping. The net hook 1600 further includes one or more teeth 1604 to provide anti-slip properties after crimping. Optionally, barbs 1606 are provided to further prevent the net rope segments from slipping once they are crimped into the recesses 1602.

[0043] Figure 14B of the net clamp 1600 actually shows the barb 1606 with the teeth 1604 removed for clarity. Either or both of features 1604 and 1606 may be included in the design of the net clamp 1600, or neither may be included. Generally, it is desirable to prevent the net rope segments from slipping and / or rotating, and features 1604 / 1606 serve this purpose. In addition, 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 secure the net rope segments together within a 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] Figure 15 is a perspective view showing a portion of playground equipment 1700, including a net grid 1702 coupled to a frame 1708 as shown. The purpose of Figure 15 is to demonstrate that there are methods for coupling to the playground equipment other than rope hooks. For example, as shown in Figure 15, a clamping mechanism 1704 is used to secure the net grid 1702 to the frame 1708. In another example, one or more eye bolts 1706 are implemented to secure the net grid 1702 to the frame 1708. These are just examples of other possible connections that are suitable for coupling the net grid 1702 to the frame 1708.

[0045] Embodiments of net ropes described herein, including net rope 1000 in Figure 10, are configured, as illustrated, to include an outer layer (e.g., woven rope fibers 1002 in Figure 10) and an inner layer (e.g., woven strands 1006 in Figure 10). In one embodiment, the outer layer is substantially composed of, for example, a fabric material and is therefore relatively soft, while the inner layer is substantially composed of, for example, a metallic material and is therefore harder. An inner core (e.g., core 1004 in Figure 10) extends through the center of both the outer and inner layers. Together, these three layers interact to support the easy movement of net rope segments relative to one another while maintaining the long-term shape and structural integrity of the net grid. The interaction of the net rope layers, in combination with the arrangement of net clamps, ensures that the shape of the space in the net grid (e.g., space 106 as referenced in Figure 1) is maintained in the long term, even if it is temporarily deformed, for example, when the net grid is subjected to user pressure.

[0046] In one embodiment, as described, the inner layer of the net rope (e.g., the woven strand 1006 in Figure 10) includes a fabric of six metal elements around a hidden central core. Each of the six metal elements is, in fact, a fabric of seven smaller individual strands. Thus, in this case, a total of 42 strands are utilized in the inner layer (not including the central core located inside the inner layer). In another example, more than 42 strands are utilized in the inner layer. In this way, a thicker, stiffer inner layer is formed, providing further protection for the central core and increased overall rigidity of the net rope. In one embodiment, the central core located 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 as readily as a fabric of metal elements or metal elements themselves.

[0047] The outer layer of the net rope (for example, the woven rope fibers 1002 in Figure 10) is, exemplary, effective in mitigating environmental conditions such as temperature changes. It is also relatively soft to the touch. In addition, the outer layer provides, exemplary, insulation and isolation of the user from the more temperature-sensitive inner layer. The outer layer is, exemplary, formed from one of a number of materials. Examples of such materials include polymer yarns, elastomer materials, nylon, plastics, or other materials suitable for maintaining 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 to 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 approximately 6.6 millimeters. However, in other examples, different diameters may be used. For example, a diameter smaller than 6.6 millimeters may be used. In this case, it is probably best to reduce the spacing between rows or columns of net clamps in the net grid. Reducing the spacing promotes the optimization of the performance and durability advantages of the net grid described herein. In addition, a diameter larger than 6.6 millimeters may also be used. In this case, it is probably best to increase the spacing between net clamps in the net grid to promote the same optimization of performance and durability advantages.

[0049] It should be noted that the net ropes described herein do not have to be round or circular in all cases. Geometric shapes other than round or circular are possible. For example, net ropes can be manufactured in square, rhombic, hexagonal, elliptical, or other shape profiles preferred in a given net grid 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 within the net grid (for example, space 106 as referenced in Figure 1) does not necessarily have to be the same as or similar to the illustrated shape. The net clamp structure can be adjusted to support various net grid spaces, such as squares, rectangles, triangles, etc. Most shapes within a given net grid configuration are formed by combinations of four net clamps. However, in some examples, fewer or more net clamps can be integrated to form various net grid spaces. In one example, the perimeter of each net grid space formed within the net grid is 20 inches or less. In this way, the net space is large enough to support gripping and / or climbing while preventing climbing through the openings of the net grid.

[0051] As shown above in relation to the drawings, the spaces in the net grid (for example, space 106 as referenced in relation to Figure 1) are formed using one or more net clamps. A net clamp is, exemplary, a crimp-type connector that brings together segments of net rope extending parallel to each other. In one embodiment, the net grid includes at least three net clamps aligned in a single row horizontally or vertically. The use of net clamps makes it possible to prevent the net ropes from overlapping each other, which is common in conventional rope climbing equipment. The net clamps described herein also make it possible for the net ropes and clamp connectors to remain aligned substantially parallel to each other (i.e., in the same plane). In one example, the net clamps surround about 100% of the cross-sectional thickness of the net rope and do not form a closed geometric shape. By closing around the net rope, the net clamps compress the sheath of the net rope, minimizing slippage.

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

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

Claims

1. Playground equipment including a net grid, A first and second segment of a continuous net rope, wherein the continuous net rope is part of the net grid and consists of an outer layer surrounding an inner layer, and the net grid is directly or indirectly attached to the play equipment, A net clamp which is part of the net grid, wherein the first and second segments of the one continuous net rope extend substantially parallel to each other through the net clamp, and the net clamp fixes the first segment of the one continuous net rope to the second segment of the one continuous net rope where the first segment and the second segment of the one continuous net rope extend substantially parallel to each other, and Playground equipment including [this item].

2. The playground equipment according to claim 1, wherein the net clamp secures the first segment of the continuous net rope to the second segment of the continuous net rope where the first segment and the second segment of the continuous net rope extend substantially parallel to each other, but the first segment and the second segment of the continuous net rope do not come into contact with each other within the net clamp.

3. The playground equipment according to claim 1, wherein the first segment of the one continuous net rope transitions to the second segment of the one continuous net rope at a loop formed around the net grid.

4. The play equipment according to claim 1, wherein the outer layer is the outer layer of a woven fabric.

5. The playground equipment according to claim 1, wherein the inner layer is a metal fabric inner layer.

6. The playground equipment according to claim 1, wherein the outer layer is a woven fabric layer and the inner layer is a metal fabric layer.

7. The playground equipment according to claim 1, wherein the inner layer is made of a material that absorbs heat more quickly than any of the materials included in the outer layer.

8. The playground equipment according to claim 1, further comprising a second net clamp which is also part of the net grid, wherein a third segment and a fourth segment of the one continuous net rope extend substantially parallel to each other through the second net clamp, and the second net clamp fastens the third segment of the one continuous net rope to the fourth segment of the one continuous net rope.

9. Playground equipment including a net grid, wherein the net grid is A continuous, elongated net rope comprising an inner layer of material covered by an outer layer, wherein the inner layer is harder than the outer layer, A plurality of rope clamps which are part of the net grid, wherein each of the plurality of rope clamps attaches the first portion of the continuous elongated net rope to the second portion of the continuous elongated net rope where the first portion of the continuous elongated net rope and the second portion of the continuous net rope extend substantially parallel to each other, and Playground equipment including [this item].

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

11. The playground equipment according to claim 9, wherein the inner layer of the material is a set of elongated metal elements interwoven with each other.

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

13. The playground equipment according to claim 9, wherein the single continuous elongated net rope has a diameter in the range of 5 to 18 mm.

14. The playground equipment according to claim 9, wherein the plurality of rope clamps are at least three sets of rope clamps included in the net grid, all of which are aligned horizontally or vertically to 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 playground structure incorporating a net grid, the structure including a plurality of net clamps that repeatedly align a first elongated segment of a continuous net rope parallel to a second elongated segment of the same continuous net rope, and the first and second elongated segments of the same continuous net rope are composed of multiple layers of material.

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

18. The playground equipment according to claim 16, wherein the first elongated segment of the one continuous net rope transitions to the second elongated segment of the one continuous net rope at a transition loop formed around the net grid.

19. The playground equipment according to claim 18, wherein the transition loop is formed on one side of one of the multiple net clamps into which the one continuous net rope is inserted and exited.

20. The playground equipment according to claim 16, wherein the plurality of net clamps align the first elongated segment of the one continuous net rope with the second elongated segment of the one continuous net rope parallel to each other at least three times in a row, so as to create a series of repeating openings between the first elongated segment of the one continuous net rope and the second elongated segment of the one continuous net rope.

Images