JPS61132015A - Coil type wire-drop clamp - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a retaining clamp for protective nuts used in the construction of overhead power transmission lines.

Prior Art This type of protective net was stretched between steel towers to catch falling objects during wire extension work, wire tensioning work, and jumper wire formation work to protect people's homes, etc. This protective net can be used with nylon rope, Kepra rope, etc. if there are houses, railways, power lines, etc. below.
Electrical insulating materials such as cloth ropes are used in the restraining clamps that attach the main rope of the protective net to the steel tower.
A simple ring-shaped clamp, a compression clamp that compresses the end of the rope and grips it, a lever type clamp that uses leverage to grip it, and a wedge clamp that grips it by biting a wedge are used. The actual length of the rope is calculated in advance by taking into account the rope slackness, clamp installation position, etc., and then the detaining clamp is installed either simply or by terminal treatment at a predetermined position of the rope where the clamp is to be installed at the factory.

Problems to be Solved by the Invention Accordingly, in the past, it has been difficult to make appropriate changes according to the local situation, and there are cases where proper installation cannot be achieved, and a great deal of effort and time is required to correct the problem. In addition, when clamping by compressing the rope, tightening the rope by lever action, or biting the rope with a wedge, there is a problem that it is difficult to grip the rope with a large gripping force because if the rope is gripped too tightly, the rope will be damaged and the strength of the rope will be reduced. Moreover, because the main rope of the protective net is cut at the clamp end, it cannot be reused in areas where the span is large, and once the rope is damaged, it cannot be reused even for the same span. , which was extremely uneconomical.

Means for Solving the Problems The present invention is intended to solve the above-mentioned problems, and its configuration will be explained below using FIGS. 1 to 3 corresponding to embodiments. A protrusion (2) having a retaining hole (4) on the negative side of a drum (2) having a rope guide groove (3) spirally formed on the outer peripheral surface.
5) and a protrusion (for applying force) on the other side of the drum (2) with a rope presser (6).

Operation The retaining clamp according to the present invention is attached to the retaining hole (4) of the protrusion (5).
When the main rope 113) at the other end of the protective net, whose one end is attached to the opposite steel tower and stretched to a predetermined slack by a come-along, is attached to the rope of the drum (2) The rope (13) wound around the guide groove (3) and coming out from the drum (2) is attached to the rope holder (
6) is fixed to the protrusion (force).Here, when the rope tension is transferred from the come-along to the retaining clamp, the rope α3 on the drum (2) is moved to the rope guide groove (3) by the rope tension.
Since the rope (13) is wrapped around the drum (2) for a length of kana υ, the drum (2)
A large rope retention force is generated. Further, since the rope (13) is wound around the spiral guide groove (3) of the drum (2), the position at which the rope (131 starts winding the drum (2)) can be easily changed by operating the come-along.

Embodiments An embodiment of the present invention will be described with reference to the drawings. (1) is the clamp body, which has a V-shaped rope guide groove (3) spirally formed on the outer peripheral surface of a cylindrical drum (2), and a retaining hole (4) on the negative side of the drum (2). A protrusion (5) is provided protrudingly, and a protrusion (force) for arranging a rope presser (6) is also protrusively provided on the other side of the drum (2).

The rope presser (6) has a long hole (8) formed in the protrusion (force).
) and the U bolt α■ and nut U inserted through the notch hole (9)
υ and Upol) (consisting of a presser foot (121) provided at the base of II. ) is arranged in a position to tier the rope taken out in the direction of arrow B, which is diagonally downward if arrow A is horizontal, and the rope taken out from the rope guide groove (3) is It is configured to be held by protrusions (force).

Since the present embodiment has the above-mentioned configuration, the retaining clamp according to the present invention is connected to the retaining hole (4) of the clamp body (11) by a connecting fitting (not shown), so that the retaining clamp according to the present invention can be placed at a predetermined position on the steel tower. When attached to the drum (2), the main rope (13) at the other end of the protective net, which has one end attached to the opposing steel tower and is stretched to a predetermined slack by a come-along (not shown), is attached to the drum (2).
) is wound around the rope guide groove (3) of the drum (2), and the rope (I3) coming out of the drum (2) is held between the presser foot (12+) of the U-bolt (10) and the protrusion (force), and the nut uD is tightened to tighten the rope (13). is fixed to the clamp body (1) K. Now, when the rope tension is transferred from the come-along to the main retaining clamp, the drum (2)
) on the rope ([3) is guided by the rope tension ([3]
), the frictional force increases, and this rope is pressed against the drum (2).
Due to the considerable length of the rope, a large rope retention force is created on the drum (2). Therefore, the rope presser (6)
The rope can be attached to the clamp body (1) with a force that does not damage the rope α~. Also, rope (13
) is wound around the spiral guide groove (3) of the drum (2), so the position at which the rope starts winding on the drum (2) can be easily changed by operating the come-along.

Effects of the Invention As is clear from the above description, according to the present invention, a large rope retention force is generated on the drum, so that the rope clamper of the rope presser can be set to an extent that does not damage the rope. Therefore, the rope can be reused. Furthermore, since it is not necessary to cut the rope when clamping the rope with the rope holder, the length of the rope used can be made longer so that it can be reused for large spans. Furthermore, the come-along can be operated to easily change the starting position of the rope winding on the drum, so there is an advantage that the slackness of the rope can be adjusted relatively easily on site.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a plan view of the same,
FIG. 6 is a view taken along arrow C in FIG. 2... Drum, 3... Rope guide groove, 4... Retaining hole, 5, 7... Protrusion, 6... Rope presser, 13...
··rope.

Claims (1)

[Claims] A spiral drum made of a drum having a spiral rope guide groove formed on its outer circumferential surface, a protrusion having a retaining hole protruding from one side of the drum, and a protrusion protruding from the other side having a rope holding device. Type detention clamp.