CN-112780647-B - Cable bridge rack compacting piece

CN112780647BCN 112780647 BCN112780647 BCN 112780647BCN-112780647-B

Abstract

The invention provides a cable bridge pressing piece. The present disclosure relates to a compression member for a cable tray. The compression member may be configured for high wind conditions. The hold-down member includes a support clamp for clamping to the support member and a hold-down arm for retaining the cable tray on the support member.

Inventors

D. C. Brooks
COMBS MICHAEL T.
J.L. JOHNSON
D. H. Petrie Jr

Assignees

伊顿智能动力有限公司
伊顿智能动力有限公司

Dates

Publication Date: 20260421
Application Date: 20201109
Priority Date: 20191107

Claims (11)

1. A compression member for securing a cable tray to a support member, the compression member comprising: A hold-down arm configured to hold a flange of a rail of the cable tray on the support without penetrating the flange or the support; a support clamp configured to clamp onto the support, wherein the compression arm is coupled to the support clamp, wherein the support clamp comprises a clamp body defining at least one slot configured to receive a flange of the support and comprising a set screw stem coupled to the clamp body, wherein at least one set screw is threadably coupled to the set screw stem, wherein the at least one slot defines an axis along which the flange is slidably received in the at least one slot, and wherein an axis of the at least one set screw extends at an acute angle relative to the axis of the at least one slot; wherein the compression member is capable of retaining the cable tray on the support member during application of a force exceeding 3,000 pounds force when the force is applied in one or more of the following directions: i) Away from the support transverse to the longitudinal axis of the cable tray and away from the support transverse to the longitudinal axis of the support, or Ii) transverse to the longitudinal axis of the cable tray and along the longitudinal axis of the support.
2. The compression member of claim 1 wherein the set screw shaft has opposite end portions disposed outside the body, each of the opposite end portions of the set screw shaft defining a threaded opening extending through the set screw shaft, the threaded opening configured to receive a respective set screw of the at least one set screw.
3. The compression member of claim 1 wherein the clamp body includes a rear wall and opposed left and right side walls extending forwardly from the rear wall, wherein the at least one slot includes a slot defined by the left and right side walls.
4. The compression member of claim 1 wherein the clamp body is channel-shaped having open upper and lower ends and an open front side.
5. A compression member according to claim 3, wherein upper ends of the left and right side walls are chamfered downward toward a front side of the main body, wherein the compression arm is seated on the chamfered upper ends.
6. The compression member of claim 1 wherein the compression member includes a first wing extending a length to clamp a lower flange of a rail of the cable tray and a second wing extending a length shorter than the length of the first wing to act as a guide over the lower flange of the rail of the cable tray.
7. The compression member of claim 6 wherein axes of the first and second wings extend at an acute angle relative to the axis of the at least one slot.
8. The compression member of claim 7 wherein the ends of the first and second wings are tapered.
9. A compression member for securing a cable tray to a support member, the compression member comprising: A support clamp including a clamp body defining at least one slot configured to receive a flange of the support and a set screw stem coupled to the clamp body; A hold-down arm coupled to the support clamp and including a first wing extending a length to clamp a lower flange of a rail of the cable bridge and a second wing extending a length shorter than the length of the first wing to act as a guide over the lower flange of the rail of the cable bridge, and At least one set screw threadably coupled to the set screw shaft and configured to engage a flange of the support, Wherein the clamp body includes a rear wall and opposed left and right side walls extending forwardly from the rear wall, wherein the at least one slot includes a slot defined by the left and right side walls, and wherein upper ends of the left and right side walls are chamfered downwardly toward a front side of the body, wherein the hold-down arms are seated on the chamfered upper ends.
10. The compression member of claim 9 wherein the set screw shaft has opposite end portions disposed externally of the clamp body, each of the opposite end portions of the set screw shaft defining a threaded opening extending through the set screw shaft, the threaded opening configured to receive a respective set screw.
11. A compression member for securing a cable tray to a support member, the compression member comprising: A hold-down arm configured to hold a flange of a rail of the cable tray on the support without penetrating the flange or the support; A support clamp configured to clamp onto the support, wherein the hold-down arm is coupled to the support clamp, wherein the support clamp comprises a clamp body defining at least one slot configured to receive a flange of the support, a set screw stem coupled to the clamp body and at least one set screw threadably coupled to the set screw stem, wherein the clamp body is channel-shaped having open upper and lower ends and an open front side, and wherein upper ends of left and right side walls are chamfered downward toward the front side of the body, wherein the hold-down arm sits on the chamfered upper end; wherein the compression member is capable of retaining the cable tray on the support member during application of a force exceeding 3,000 pounds force when the force is applied in one or more of the following directions: i) Away from the support transverse to the longitudinal axis of the cable tray and away from the support transverse to the longitudinal axis of the support, or Ii) transverse to the longitudinal axis of the cable tray and along the longitudinal axis of the support.

Description

Cable bridge rack compacting piece Technical Field The present disclosure relates to a compression member for a cable tray. Background The cable trays are typically supported by a series of parallel supports (e.g., braces, C-channels, I-beams, etc.) suspended and spaced apart along the longitudinal direction of the cable tray. The cable bridge rests on these supports and is held in place on the supports by a compression member attached to the supports. These hold-downs aim to hold the cable bridge on the support and to inhibit lateral displacement of the cable bridge relative to the support. Two types of compression members are common in the industry, one type that acts as a clamp for rigidly clamping the cable tray against the corresponding support, and a second type that acts as a guide to loosely hold the cable tray on the support to allow thermal expansion and contraction of the cable tray due to temperature changes. These compression members may not be suitable for high load applications, such as high wind applications. In contrast, in such applications, penetrating fasteners may be required to secure the cable tray to the support. For example, the fastener may be driven through a lower flange of a rail of the cable tray and into the support. Drawings Fig. 1 is a perspective view of a cable tray retained on a lateral support by a pair of compression members of the present disclosure. Fig. 2 is an enlarged perspective view of the hold-down member. Fig. 3 is an exploded perspective view of the pressing member. Fig. 4 is an enlarged fragmentary view of fig. 1 showing one hold down in a clamp configuration. Fig. 5 is a side view of fig. 4. Fig. 6 is a front elevational view of fig. 4. Fig. 7 is an enlarged fragmentary view of fig. 1 showing another hold-down member in a guide member configuration. Fig. 8 is a side view of fig. 7. Fig. 9 is a front elevation view of fig. 7. Fig. 10 is a perspective view of a cable tray retained on a lateral support by a pair of compression members according to another embodiment of the present disclosure. Fig. 11 is an enlarged perspective view of the hold-down member. Fig. 12 is an exploded perspective view of the hold-down member. Fig. 13 is a front elevational view of one compression member in a clamp configuration. Fig. 14 is a front elevational view of one compression member in a guide member configuration. Fig. 15 is a first side view of the hold down. Fig. 16 is a second side view of the hold-down member. Corresponding reference characters indicate corresponding parts throughout the drawings. Detailed Description The present disclosure relates to a compression member for a cable tray configured to retain the cable tray on a support member. In one embodiment, the compression member is non-penetrating (i.e., the compression member does not extend through the cable tray or support) and is configured for high load applications, such as high wind applications. In this same or another embodiment, the compression members may be configured to retain the cable tray on an I-beam or other beam having a flange. The hold down may be configured to clamp or otherwise attach to a flange of the I-beam. In this same or another embodiment, the compression member may be configured between a clamp configuration in which the compression member engages or contacts the rail of the cable tray and acts as a clamp, and a guide configuration in which the compression member acts as a guide that allows some movement (e.g., expansion) of the cable tray relative to the support. Throughout the drawings, a compression member having each of the above features is indicated generally by the reference numeral 10. Referring to fig. 1, a pair of compression members 10 are provided for retaining a cable tray, generally indicated at 12, on a support, generally indicated at 14. In the illustrated embodiment, the support 14 is an I-beam having an upper flange 18. The illustrated cable tray 12 is of the type that includes a pair of generally parallel side rails (each indicated generally at 20) interconnected by a series of parallel, spaced apart cross members 22. The cross-sectional shape of the rail 20 may vary depending on the type of cable tray 12. For example, the illustrated rail 20 is an I-beam (e.g., an aluminum I-beam), each having a vertical web 24 and upper and lower horizontal flanges (indicated at 25 and 26) extending laterally outward from the web (such as on opposite sides of the web), respectively. The cable tray 12 may be adapted to carry various types of conduits. For purposes of illustration, one compression member 10 is shown in a clamp configuration (also shown in fig. 4-6), and the other compression member 10 is shown in a guide configuration (also shown in fig. 7-9). It will be appreciated that in use, typically each hold-down member will be in the same configuration. Referring to fig. 2 and 3, the illustrated hold down 10 includes a support clamp (indicated generally at 27) and a hold dow