Patent Application
20240009878
The present disclosure relates generally to the installation of a cable lacing tape and more particularly to an apparatus for tensioning, terminating, and cutting a cable lacing tape.
Cable lacing tapes may be used for a variety of applications. Modern cable lacing tapes typically are a thin, relatively flat, woven, or braided cord, often referred to as a “tape”, having filaments that may be made of materials such as nylon, polyester, or aramid fiber, and which may be impregnated with coatings to enhance particular performance characteristics. However, cable lacing tape has drawbacks in that the cable lacing tape typically is tied by hand in a costly, labor-intensive, and time-consuming process. Due to these problems, several attempts have been made to automate the cable lacing and tensioning, terminating, and cutting process.
One such device for automated knot tying is described in U.S. Pat. No. 6,648,378. The described device includes an automatic knot-tying device for tying a discrete knot about a workpiece, such as a bundle of wires. The device works by pulling a lacing tape, transversely around the workpiece and wrapping the filament around the workpiece. A shuttle moves the filament between carriage rings and along the workpiece at the appropriate steps, and a plurality of hooks pull the filament away from the workpiece at the appropriate steps. The operation is finished by cinching, cutting, and reloading so that the resulting knot is discrete and secure. At least one drawback of the described device is that it requires a complicated mechanism to both wrap and tie a knot about the workpiece.
In still another example, International Application Number PCT/US2012/044413, describes a hand-held tool for tensioning and severing a cable tie. The device includes a reciprocating tensioning mechanism such as a pawl link for tensioning the cable tie tail, a locking mechanism to prevent further tensioning upon the attainment of a preselected tension level in the tie tail, and a severing device to sever the tie tail from the cable tie head once installed.
Yet another example is U.S. Pat. No. 9,701,428, which discloses an apparatus for tensioning and includes a housing, a spur shaft reciprocally coupled to the housing, a trigger operably coupled to the housing and to the spur shaft to effect translation of the spur shaft when the trigger is operably moved, a tensioning device mounted to the housing and operably coupled to the spur shaft such that translation of the spur shaft causes operation of the tensioning device, and a passage having an inlet and an outlet, the passage operably coupling the inlet and outlet to the tensioning device.
An apparatus for tensioning, terminating and cutting a cable lacing tape is disclosed. The apparatus includes a housing, a shaft having a first end and a second end, a sliding worm gear coupled proximate the first end of the shaft, and a motor coupled proximate the second end of the shaft and configured to rotate the shaft. The apparatus also includes a biasing element coupled to the shaft between the sliding worm gear and the motor to exert a biasing force on the sliding worm gear, and a capstan rotatably engaged to the sliding worm gear and configured to receive the cable lacing tape. In addition, the apparatus includes a cutting mechanism configured to cut the lacing tape when a predetermined torque on the capstan is exceeded. The biasing force of the biasing element is configured to prevent translation of the sliding worm gear until the predetermined torque on the capstan is exceeded.
In a particular aspect, translation of the sliding worm gear activates the cutting mechanism. The cutting mechanism may comprise a lever and a cutting head, where the lever is configured to rotate the cutting head to cut the lacing tape when the lever is engaged by the translation of the sliding worm gear. The cutting head may comprise a blade configured to cut the lacing tape.
The capstan may comprise a gear coupled to the sliding worm gear, where the sliding worm gear may be configured to translate relative to the gear when the biasing force of the biasing element is exceeded.
The biasing element may comprise a spring, and the motor may be an electric motor or a pneumatic motor. The apparatus may include a trigger in communication with the motor, where the trigger is configured to activate the motor through the tensioning, terminating and cutting of the cable lacing tape.
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout.
U.S. Patent Application No. 2015/0267844 and U.S. Pat. No. 9,682,806, each of which is incorporated herein by reference in its entirety, both generally disclose a cable lacing tie for holding a plurality of objects together. The disclosed cable lacing ties generally include a head assembly and a length of cable lacing tape that can be retained by the head assembly upon activation of a retainer of the head assembly. In the disclosed example cable lacing ties, a free end of the cable lacing tape is routed (generally be hand) through an opening in the head assembly around the retainer, which is actuatable from an unlocked position to a locked position by pulling the free end of the cable lacing tape with sufficient force.
In at least some instances, the cable lacing tape comprises a length of woven aramid fiber tape with a synthetic rubber coating attached to a polymer fastener. While the free end must be activated with sufficient force to actuate the retainer, this tape material may be difficult to grip by hand and furthermore may be difficult to grip mechanically utilizing the standard cam action of existing cable lacing tape guns due to the coating acting as a dry lubricant as well as the abrasive nature of the aramid fiber.
It has been found that a directional change, wrapping, and/or folding of the cable lacing tape assists in the grip allowing the tool to build tension in the cable lacing tape. This tension is required to both activate the retainer in the head assembly as well as activate the cutting action in the tool linkage (if available).
Referring now to
The apparatus 100 includes a housing 102 in the general shape of a pistol or gun having a grip 104, trigger 114, and a barrel portion 106. In this example, a forward end of the barrel portion 106 includes an exposed capstan 108.
The apparatus 100 may include a battery 112 to provide power for operation. In operation, the cable lacing tape is loaded into the capstan 108 and the trigger 114 is depressed to cause an electric motor 120 to rotate a sliding worm gear 126 that is held in an initial position by means of a spring 124 as discussed in more detail below. The sliding worm gear 126 engages into a gear 130 that is coupled to the capstan 108 to rotate the capstan 108 to tension the cable lacing tape. After a predetermined torque on the capstan 108 is achieved and the retainer of the lacing tape head assembly (not shown) is activated, the spring tension is overcome to push the sliding worm gear 126 axially backward about its axis of rotation that then engages the cutting mechanism 110 to cut the cable lacing tape while maintaining the proper tension to not break it.
The cutting mechanism 110 at an end of the barrel portion 106, as best shown in
As illustrated in
The capstan 108 is rotatably engaged to the sliding worm gear 126 that drives the capstan 108 in order to tighten and tension the cable lacing tape. The cutting mechanism 110 is configured to cut the lacing tape when a predetermined torque on the capstan 108 (or tension on the cable lacing tape) is exceeded. The biasing force of the biasing element 124 is configured to prevent translation of the sliding worm gear 126 until the predetermined torque on the capstan 108 (or tension on the cable lacing tape) is exceeded. The translation of the sliding worm gear 126 is what activates the cutting mechanism 110.
The cutting mechanism 110 may comprise a lever 140 and a cutting head 118 as best shown in
Referring now to
Many modifications and other embodiments of the invention will come to the mind of one skilled in the art having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is understood that the invention is not to be limited to the specific embodiments disclosed, and that modifications and embodiments are intended to be included within the scope of the appended claims.
This application claims the benefit of U.S. provisional application No. 63/358,692 filed Jul. 6, 2022, which is hereby incorporated herein in its entirety by reference.
| Number | Date | Country | |
|---|---|---|---|
| 63358692 | Jul 2022 | US |
