GB2169976A - Load binder - Google Patents

Abstract

A load binder for e.g. a chain or cable having a shortened handle 24 with means to receive and interlock with a separate extension member 40, which is also adaptable to release the load binder. The extension member is adapted at 50 to release the binder by inserting it between the actuator tank (20 - Figure 1), link (12 - Figure 1) and eye (14 Figure 1). <IMAGE>

Description

SPECIFICATION Load binder handle and extension therefor The present invention concerns a load binder for applying tension to a chain or other flexible load retaining element having a handle and a removable extension therefor.

It is an object of this invention to provide an improved load binder for applying tension to a chain or other flexible load retaining element which surrounds items or material to retain them from moving.

Specifically, the invention is directed to a load binder that applies tension to a chain or other flexible load restraining element. The load binder comprises at least two link members adapted to be attached to the chain and includes other forms of attachment mechanisms at the end such as hooks and which are well known in the art. Although a chain is described, other flexible elements, i.e., cable are within the scope of the invention. The link members are pivotally interconnected by an actuator link that pivots between a relatively extended slack chain position to a relatively retracted chain tension position and locked in the retracted position by an over center concept. Once locked, the chain or other flexible member is held under tension around the load. The actuator link of this invention is comprised of a toggle arm and a handle that is attached thereto.The handle is relatively short, preferably a hand-breadth in length and is adapted to be utilized in the early stages often- sioning the load by removing as much slack as possible by a fairly simple hand operation. When the final over-center locking position is to be achieved, the handle of this invention is too short to obtain the usual tensioning lever-arm force. The invention includes an extension handle which is adapted to be inserted over the short handle and interlocked therewith. Movement of the extension handle then permits the over-center final tensioning position. Afterwards, the extension handle is removed from the short handle and stored.When it is desired to release the load binder, the other end of the extension handle includes means for inter-engaging between the actuator link and one of the chain members with a pivoting action that releases the over-center position while permitting the operator to have full control over the extension handle. That is the extension handle does not follow the releasing movement of the actuator link.

The invention will now be described further, by way of example, with reference to the accompanying drawings, in which: Figure 1 is an elevational side view of the load binder according to this invention in the over-center locked position.

Figures 2 and 3 are sectional views taken along the line 2-2 and 3-3, respectively.

Figure 4 is a side elevational view of the extension handle of this invention.

Figure 5 is an end view taken toward the left side of Figure 4.

Figure 6 is an end view taken toward the right side of the view of Figure 4.

Figures 7, 8 and 9 are sectional views taken along the lines 7-7, 8-8 and 9-9, respectively of Figure 4.

Figure 10 is a side elevational view depicting the combination of the extension handle and the actuator link mechanism, depicting its use in applying the final tensioning position.

Figure 11 is a partial side elevational view depicting the manner of releasing the load binder.

Figure 12 is a side elevational view of an alternate embodiment.

Figure 13 is a partial top view of the release portion of the extension handle.

Figure 1 illustrates the load binder according to the present invention and generally designated by the numeral 10. The binder 10 is made up of a Ushaped clevis 12 connected to swivel eye 14 and chain 15. A second swivel link 16 is connected to chain 18. A pivotal actuator link 20 interconnects swivel links 12 and 16 at respective pivot points 13 and 17. Link 12 includes as a part thereof an opening 22 within which a padlock or other means may be attached for securing the load binder in its locked position. The actuator link 20 includes a handle 24 approximately a hand breadth in length and having therein a gripping portion formed by raised cylindrical portions 26 and 28 from a smaller diameter rounded portion 30. Each of the raised surfaces, in this embodiment, include respective recesses 32 and 34 (See Figures 2 and 3) which are angularly dis-aligned with each other.That is, recess 32 is 180 from recess 34. These recesses are adaptable to be used with the extension handle described in Figure 4. Referring now to Figures 4 through 9, the extension handle comprises a cylindrical body 40, having an opening therein 42 to telescopically receive the handle 24. A cylindrical member 44 is positioned adjacent the left end 46 and includes an interior protuberance 48 which, in use, will cause the interlocking of the extension body 40 with the handle 24 of the actuator link as hereinafter described. The length of the extension handle may vary with the type of load binder but will be that length which will provide the operator sufficient leverage power to toggle and lock the load binder in its over-center position and to release the load binder.At the right end of the extension body is the release portion generally designated by the numeral 50, its shape being best seen with reference to Figures 6, 8 and 9. In this embodiment, the release portion includes a Ushaped or V-shaped groove 52 having a strenghening rib 54 therebelow.

The use of the invention is best described in reference to Figures 10 and 11. As shown, the extension body 40 has been positioned and interlocked with the handle 24. This occurs by telescoping the opening 42 of extension 40 onto short handle 24, and by causing the protuberance 48 to enter recess 32. The extension handle is rotated 180 to where protuberance 48 will align with the recess 34 in portion 26 and axially moved thereacross. Further rotation of the handle locks the extension body to the handle 24. Removal occurs by the reverse ac tion described. Prior to attachment of the extension body 40, the operator may take up slack by using the handle 24 until the final tensioning position is desired, at which time the extension body 40 is placed as previously described.Upon the application of a downward force the actuator link and its associated linkages are placed into the over-center locking position as shown in Figure 1. The extension handle 40 is then removed and stored until it is time to release the load binder. The release of the load binder occurs by taking the release portion 50, and inserting it, as shown in Figure 11 between the actuator link 20 and the link 12 and eye 14 and chain 15. Upward movement of the extension handle and body will cause the handle 24 to nest in groove 52, and cause the actuation link to return or toggle to the slack position releasing the restraining force.

Because of the design of the releasing portion, the handle 24 moves away rapidly while the operator maintains safe control of the extension housing or handle 40.

Figure 12 represents an alternate embodiment of the invention. The actuator link 60 is similar in all respects to actuator link 20 heretofore described.

The distinction arises in the location of a locking arm 62 formed as a part of link 12. The locking arm includes an opening 64 in which a padlock or other means to retain the load binder in its off-center position is accomplished for safety and security purposes.

Figure 13 represents the top of release portion 50 wherein the nose 51 includes a recess 53 therein in order to nest with the actuator link as shown in Figure 11.

Other advantages of using an improved load binder of the present invention are numerous.

Since the extension handle is removable, the load binder itself is more compact and less expensive, particularly in that one handle will operate a series of binders rather than each binder having an attached handle. The detachability of the handle and the fact that it is used to pry through a relatively small angle to release the load binder, are further characteristics. Considering that the force applied to the over-center locking tension position has to be similarly applied during the release of the load binder, the ease of operation of the load binder and its extension handle of this invention becomes apparent. More importantly, by selecting the appropriate length of the removable handle during the design stage of the load binder intentional over-loading situations can be sensed by the operator during the tensioning procedure. In addition, the compactness of the binder provides ease in handling because a lighter weight and the lack of the long handle.

Claims (5)

1. A load binder for applying tension to a chain or other flexible load retaining element, in which the load binder comprises at least two link members each adapted to be attached to the chain, the link members being pivotally interconnected to an actuator link that pivots between a relatively extended slack chain position and a relatively retracted chain tension position, the actuator link being adapted to lock over-center whereby the chain is held under tension, the actuator link comprising a toggle arm and a handle rigidly formed thereto, the handle being substantially a handbreadth in length and a removable extension including means at one end to interconnect and interlock with the handle and means at the other end to release the over-center locking tension position.

2. A load binder as claimed in claim 1, in which one end of each link member is adapted to be attached to the chain, the actuator link being adapted to pivot and retain the link members in an overcenter position to hold the chain under tension, the handle having a plurality of spaced circumferential raised surfaces thereon, a slot coaxial with the handle, across each of the raised surfaces, each of the slots being unaligned with each other and means at one end of the extension to rotatably telescope over the handle, a protuberance inside the extension adapted to pass through the slots when aligned therewith as the extension handle is rotated and telescoped on to the handle, a tapered portion at the other end of the extension being Ushaped in cross section.

3. A load binder as claimed in claim 1 or 2, in which the handle has a hand grip surface thereon and the removable extension, includes means at one end to interconnect with the hand grip surfaces so as to be interlocked therewith.

4. A load binder as claimed in claim 3, in which the terminus of the other end of the removable extension includes a second U-shaped recess that is transverse to the tapered U-shaped portion.

5. A load binder constructed and arranged to operate substantially as herein described with reference to and as illustrated in the accompanying drawings.