Impact Absorbing Bollard

Abstract

An apparatus includes an inner core including a metal tube with a flange attached to its distal end, an elastic bumper assembly configured to enclose the distal end of the inner core therein, and a number of anchor assemblies, each anchor assembly including a washer and an anchor. Each anchor assembly extends through the bumper assembly and the flange such that a portion of the bumper assembly is held captive between the washer of the anchor assembly and the flange.

Claims

1. An apparatus comprising: an inner core including a metal tube with a flange attached to its distal end; an elastic bumper assembly configured to enclose the distal end of the inner core therein; and a plurality of anchor assemblies, each anchor assembly including a washer, wherein each anchor assembly of the plurality of anchor assemblies extends through the bumper assembly and the flange such that a portion of the bumper assembly is held captive between the washer of the anchor assembly and the flange.

2. The apparatus of claim 1, wherein the elastic bumper assembly includes two halves.

3. The apparatus of claim 2 wherein each half of the elastic bumper assembly is configured to accommodate a part of the flange and one or more anchor assemblies of the plurality of anchor assemblies.

4. The apparatus of claim 1 wherein the plurality of anchor assemblies attaches the apparatus to a surface and the flange is spaced apart from the surface by a part of the elastic bumper assembly.

5. The apparatus of claim 1 further comprising a plastic cover disposed on the inner core.

6. The apparatus of claim 5 wherein an outer diameter of the plastic cover is less than an outer diameter of the elastic bumper assembly.

7. The apparatus of claim 1 wherein the bumper assembly is made of an elastomeric material.

8. The apparatus of claim 1, further comprising a plurality of gussets attached to the metal tube and the flange and configured to reinforce the inner core under an impact.

9. The apparatus of claim 5, wherein the plastic cover extends along a length of the inner core.

10. The apparatus of claim 5, wherein a distal end of the plastic cover includes reflective rings to increase visibility.

11. The apparatus of claim 5, wherein a foam tape is attached to the inner core to separate the plastic cover from the inner core.

12. The apparatus of claim 4, wherein the bumper assembly further comprises a plurality of anchor receptacles and the apparatus is attached to the surface by inserting the plurality of anchor assemblies through openings in the plurality of anchor receptacles and into the surface.

13. The apparatus of claim 12, wherein the washers of the plurality of anchor assemblies prevent respective distal ends of the plurality of anchor assemblies from passing through the openings in the plurality of anchor receptacles.

14. The apparatus of claim 13, wherein each anchor assembly of the plurality of anchor assemblies includes a fastener and the washers of the plurality of anchor assemblies prevent respective distal ends of the fasteners of the plurality of anchor assemblies from passing through the openings in the plurality of anchor receptacles.

15. The apparatus of claim 12, wherein each opening extends from a bottom of the respective receptacle to the surface.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is an impact absorbing bollard.

[0015] FIG. 2 is an exploded view of the impact absorbing bollard of FIG. 1.

[0016] FIG. 3 is a cross-sectional view of a lower portion of the impact absorbing bollard of FIG. 1.

[0017] FIG. 4 is a cut-away view of an impact absorbing section of the impact absorbing bollard of FIG. 1.

DETAILED DESCRIPTION

[0018] Referring to FIG. 1, an impact absorbing bollard 100 is configured for installation in a ground-surface 108 in a warehouse facility to protect warehouse workers, delivery vehicles, and structural elements of the warehouse facility as delivery vehicles are loaded with goods for last mile delivery.

[0019] The bollard 100 includes an upper portion 102 and a lower portion 104. The upper portion 102 is configured to safely receive and absorb impacts from delivery vehicles as they move in and about the warehouse facility. The lower portion 104 is configured to receive impacts from trolleys or carts (not shown) that workers in the warehouse use to transport goods for loading onto the delivery vehicles. A diameter, d.sub.1 of the upper portion 102 is less than a diameter, d.sub.2 of the lower portion 104 to ensure that parts of a worker's body are not pinched between a trolley or cart and the upper portion 102 when the trolley or cart impacts the lower portion 104.

[0020] Referring to FIG. 2, the bollard 100 includes an inner core 210, a plastic cover 212 and a two-piece impact absorbing bumper assembly 214. The inner core 210 includes a hollow metal tube 216 with a flange 218 welded to its distal end 220. The flange 218 includes a number of through-holes 224 that accommodate anchors when the bollard 100 is attached to the ground (as is described in greater detail below). Reinforcing gussets 222 are welded to the hollow metal tube 210 and the flange 218 to provide additional strength when the bollard 100 is struck.

[0021] The plastic cover 212 is sized and shaped to slide onto and over the inner core 210 from its distal end 226. In some examples, a foam tape 228 is attached to the inner core 210 prior to placing the plastic cover 212 thereon. The foam tape 228 holds the plastic cover 212 away from the inner core 210 to prevent the two members from rattling against each other.

[0022] Referring to FIGS. 2-3, the bumper assembly 214 is made of an elastomeric material (e.g., ethylene propylene diene monomer (EPDM) rubber) and includes a first half 214a and a second half 214b. Each of the halves includes a corresponding bottom wall 330a, 330b and a corresponding flange-receiving slot 332a, 332b. When the two halves 214a, 214b of the bumper assembly 214 are installed on the distal end 220 of the inner core 210 (like closing a clamshell), the flange 218 of the inner core 210 rests on the bottom walls 330a, 330b of the two halves 214a, 214b and extends into the flange-receiving slots 332a, 332b. The flange 218 is therefore separated from the surface 108 by the bottom walls 330a, 330b, and has its motion restricted by virtue of the flange 218 being in the flange-receiving slots 332a, 332b.

[0023] Referring to FIGS. 3-4, the first half 214a and the second half 214b of the bumper assembly 214 also include anchor receptacles 334. The bollard 100 is attached to the surface 108 by inserting anchors 336 including washers 338 into the anchor receptacles 334, through through-holes 340 at a bottom of the anchor receptacles 334, through the through-holes 224 in the flange 218, through through-holes 344 in the bottom walls 330a, 330b, and finally into the surface 108. The washers 338 rest at the bottom of the anchor receptacles 334 and prevent the anchors 336 from passing entirely through the through-holes 340 at the bottom of the anchor receptacles 334.

[0024] In operation, when the bollard 100 is struck by a vehicle, the inner core 210 is caused to deflect away from the impact. As the inner core 210 deflects, portions of the bumper assembly 214 that reside between the washers 338 and the flange 218 are compressed between the washers 338 and the flange 218, thereby absorbing the force of the impact. When the impact subsides, those portions of the bumper assembly 214 decompress and return the bollard 100 to its original, undeflected position.

1 Alternatives

[0025] In some examples, walls of the bumper assembly are approximately ¾ inches thick.

[0026] In some examples, the gussets of the inner core provide structural stability, including strengthening the attachment of the flange to the hollow metal tube and reinforcing the distal end of the inner core against bending when the bollard is struck.

[0027] In some examples, the plastic cover extends along a length of the inner core. In other examples, the plastic cover rests (e.g., in a notch) on a top end of the bumper assembly. In some examples, a distal end of the plastic cover includes reflective rings to increase visibility.

[0028] A number of embodiments of the invention have been described. Nevertheless, it is to be understood that the foregoing description is intended to illustrate and not to limit the scope of the invention, which is defined by the scope of the following claims. Accordingly, other embodiments are also within the scope of the following claims. For example, various modifications may be made without departing from the scope of the invention. Additionally, some of the steps described above may be order independent, and thus can be performed in an order different from that described.