JPS6011259B2 - Wire rope socket fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to wire rope fittings, and particularly to wire rope fittings.
Regarding wedge socket fittings used with

An improved form of the all-rope wedge clamp described in U.S. Pat. No. 3,351,986 includes a pair of wedge elements that grip the wire rope as a result of wedging within the socket element.

Prior patents relating to such wire rope clamps include U.S. Pat.
No. 848776. The structure of these patents suffers from the problem that the wedge element becomes loose relative to the wire lobe when a force is applied that opposes the pulling force that normally acts on the lobe to draw the wedge element tightly into the socket.

Thus, the wedge element moves longitudinally outwardly from the socket under the reaction of the wedge face of the socket which causes the wire rope and the wedge element to move longitudinally towards the enlarged end of the socket. The present invention provides an improved socket fitting for use with wire rope that includes a device for effectively maintaining a wedge element clamped to the wire rope and preventing the clamped wedge from exiting the socket outwardly. I will provide a.

The device for maintaining the clamping relationship between the wedge element and the wire rope is adapted to provide maximum retention on the light end portion of the forward wedge element of the socket. The wedge element includes a forward extension that projects forward of the socket when first assembled in the socket for the wire rope. The retaining or securing device consists of a device that surrounds the forward extensions of the wedge element and presses the extensions together firmly to tighten the wire rope therebetween. The retaining device further projects laterally outwardly and causes the socket to run parallel to the retaining device as the wedge element and wire rope move longitudinally outward, thereby causing the wedge element to longitudinally exit the socket. to ensure prevention of Thus, the attachment holding device constitutes a reliable wedge retaining device. The Otsuke safety and locking device is an improved wedge socket fitting that is extremely simple and economical in structure, and also effectively avoids the problems of conventional devices and provides a high degree of safety during use of the fitting. I will provide a. Other features and advantages of the invention will become apparent from the following description with reference to the accompanying drawings.

In the exemplary embodiment of the present invention shown in the drawings, "socket fitting 10"
includes a socket 11 and a pair of wedge clamps 12,1
It consists of a wedge metal fitting structure that includes 3. The socket 11 includes a longitudinal bore 14 having a pair of opposed wedge surfaces 15,16. The through hole 14 passes through the rear end of the socket 11, that is, the outside end 17, and closes rearward, and also passes through the front end, that is, the inner end 18 of the socket, and opens forward. The front end of the hole 14 is sloped to be narrow. The socket may include a rear connecting portion 19 for connecting the fitting to its associated device. Wedge elements or wedge clamps 12, 13 are used for wedge engagement with the end 22 of the wire rope length.
It has outer wedge surfaces 20, 21 adapted to engage wedge surfaces 15, 16 of the socket.

The wedge element has opposed lobe engagement surfaces 23 which may be helically contoured to match the helical outer surface of the wire rope to improve the tightening action with the wire rope. . As best seen in FIGS. 1 and 2, each wedge element includes a forward extension that projects forward of the forward end 18 of the socket in the initial arrangement of the clamp.

In particular, the wedge element 12 has a forward extension 24 and the wedge element 13 has a forward extension 25. The extension 24 has an outwardly open groove 26 and the extension 25 has an outwardly open groove 27. In order to maintain the attached relationship between the wedge element and the end 22 of the wire rope and to prevent the wedge element tightened to the wire rope from slipping out to the right through the through hole 14 of the socket due to the force acting on the wedge element, for example. In association with the extensions 24, 25 of the wedge elements there is provided an anchoring device 28.

The device 28 includes a U-bolt 29 with a bar 30 secured to the inside of the intermediate portion 31, for example by welding 32. The bar 30 is connected to the groove 26 of the wedge element extension 24.
It has become accepted by The U-bolt legs 33, 34 pass through a bar 35 which is adapted to be received in the groove 27 of the wedge element extension 25. Attach an appropriate nut 3 to the threaded portion 37 of the U-bolt legs 33 and 34.
6 are threaded together, thereby pushing the bar 35 towards the bar 30 and tightening the wedge element extensions 24, 25 to the wire rope to maintain the wedge elements 12, 13 in a longitudinal wire rope relationship at all times. . As shown in FIG.
5, 16 such that the extension of the wedge element is placed through the through hole 14 in front of the end 18 of the socket, and then the device 28 is secured to the extension of the wedge element.

The wire rope is inserted into the wedge element 12 in order to ensure that the helix of the wire rope is set accurately into the helical groove 23 of the wedge element.
and 13, and then attach the nut 36 of the device 28 vertically. When a tension force is applied to the wire rope length in the normal direction (i.e., to the left as viewed in Figure 2), the wedge element wire rope assembly will move to the left, i.e., to the left of the wedge element extension, as shown in Figure 2. It will be drawn to the dotted line position.

Such forward longitudinal movement increases the clamping action of the wedge element on the wire rope as a result of the wedging action created by the compression between the wedge faces 20, 21 of the wedge element and the faces 15, 16 of the socket. The tightening action of the device 28 and the wedging action of the socket 11 provide a holding strength that is comparable to or greater than that of the wire rope itself, thereby allowing the fitting to be held substantially up to the point of failure of the wire rope itself. 10 was found to be able to be held securely on the wire rope. Sometimes the pulling force acting in the normal direction is interrupted, and sometimes an opposite force is just applied to the rope pushing the wedge element rope assembly backwards through the socket, i.e. to the right as viewed in Figure 2. .

As a result of the fact that the positive clamping force exerted by the device 28 is maintained at all times, under such conditions the clamping of the wedge elements 12, 13 with the wire rope is prevented, despite the removal of the pressing wedge effect on the wedge elements of the socket. Release of engagement is effectively prevented. Furthermore, the bars 30, 35 of the device 28 are prevented from passing longitudinally rearwardly past the end 18 of the socket by their interference with the end 18 of the socket, as shown in FIG. The wedge element and wire rope assembly is effectively prevented from slipping out longitudinally despite the rearward force exerted on it. Thus, at any time, the clamp 10
The wedge element is designed to provide a proper wedging action on the wire rope, and the amount of clamping force is predetermined so that the tensile force acting on the wire rope is likely to cause an increase in the wedging action. automatically increases from the minimum amount specified.

The minimum clamping force produced by the device 28 is sufficient to maintain the desired latching relationship between the wedge element and the wire rope, even though the socket is not initially exerting any wedging action on the wedge element. It is. It has been found that the use of the aggressive cottoning device 28 does not cause longitudinal displacement of the wedge elements 12, 13, whereas such displacements occur with conventional devices.

Such displacement can cause the wedging device to loosen and cause the connection to fail. By eliminating such displacement, a reliable holding and tightening action can be obtained for the metal fitting 10. The descriptions of specific embodiments detailed herein are merely illustrative of the invention.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a socket fitting according to the present invention fixed to the end of a wire rope; FIG. 2 is a longitudinal sectional view thereof;
FIG. 3 is a cross-sectional view taken along line 3--3 in FIG. 2. 10...Socket metal fitting, 11...Socket, 1
2, 13... Wedge element, 14... Through hole, 16, 16... Wedge surface, 24, 25...
・Front extension part, 28... Fixation device. Ushio/Number and Uchipi・3

Claims (1)

[Claims] 1 a socket having a through hole with opposing wedge surfaces that approach each other at inner ends; a first wedge element located within the through hole and having an outer surface that engages one of the wedge surfaces; a second wedge element located within the through hole and having an outer surface that engages with the other of the wedge surfaces, the wedge element having a wire rope extending longitudinally through the through hole. the wedge element has an inner surface adapted to engage the wire rope, the wedge element being longitudinally inward from the inner end of the throughbore as a result of wedging action of the wedge element on the wire rope by the wedge surface of the socket; The wedge element has a front extension projecting from the inner end of the through hole, and the front extension of the wedge element is configured to tighten the wire rope effectively and reliably so that the wire rope does not slip out. A fastening device for adjustable tightening is fixed to the protruding forward extension of the wedge element, the fastening device and the inner end of the socket cooperating with each other to secure the tightened wire in the through hole. A socket fitting for use with a wire rope, characterized in that it reliably limits longitudinal outward movement of the rope and wedge element.