JPH01274777A - Device for fastening rope and fastening fitting - Google Patents

Abstract

PURPOSE:To make it possible to prevent a rope from slipping off by arranging a cam body in such a way as to be pressed against a rope support body, and thereby forming both the supporting face of the rope supporting body and the shape in the longer direction of the circular pressing face of the cam body into a shape meeting the twisting of the rope. CONSTITUTION:A rope supporting body 10 which is made of stainless steel and formed into a circle shape by means of a lost wax process, is fixed between two sheets of boards 17 at their one end section with several rivets, and the circumference of it is formed into a supporting face 10a in a recessed shape. A part 10b of the supporting face 10a which is brought in contact with a rope 12 with pressure is formed into a straight tangent shape. A cam body 11 is formed by means of the lost wax process, and the rear end section of it is pivotally mounted onto a pivot 15 arranged approximately at a midpoint of the board 17. The pressure contact face 11a of the cam body 11 jointly comes in contact with the twisting section 12a of the rope 12 with pressure so as to let the rope be fastened so that it will never be pulled off even if it is pulled to the direction indicated by an arrow head. When an end section 13a is pressed against the bottom face of an engaging groove 14 on the back section of the cam body 11 with a lever 13 rotated to the direction indicated by an arrow head, the cam body 11 is rotated to the direction indicated by an arrow head at a fulcrum of the pivot 15 while a spring 16 is being overcome, fastening of the rope 12 is thereby released.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rope fixing method and its fixing fittings.

[Conventional technology]

For example, at high-altitude work sites such as power line work, civil engineering construction work, painting work, etc., between handrails and pillars 4.
A main rope 1 (synthetic fiber or cotton rope) is stretched horizontally between the two, and a lifeline 2 is hung from the main rope 1 to prevent workers from falling and to ensure safety when working at heights.

At this time, a fixing fitting 3 (commonly known as a main rope tensioning fitting) is used to stretch the main rope 1 horizontally.

This fixing fitting 3 is made by pressing a cam body onto a rope support, and the rope is fixed by pressing the rope between the rope support and the arc-shaped pressure contact surface of the cam body. To prevent the rope from slipping, the pressure contact surface is provided with saw-toothed non-slip teeth or has anti-slip protrusions scattered throughout.

However, if a strong tension is applied to the rope, it has the disadvantage of slipping, and if the rope is pressed too tightly, the surface of the rope may be cut (crushed) by the non-slip teeth or protrusions, or it may become abraded. The tension of the rope could drop and break, making it extremely unsafe and extremely dangerous.

[Problem to be solved by the invention]

The present invention solves these drawbacks, and therefore has a simple structure that allows the rope to be firmly and safely fixed without slipping, breaking or abrading the rope. It is a technical challenge to provide a fixing method and its fixing hardware.

[Means to solve the problem]

A cam body 11 is provided in pressure contact with the rope support 10, and the rope n is pressed and fixed between the support surface 10a of the rope support 10 and the arc-shaped pressure contact surface 11a of the cam body 11. In the metal fitting, the pressure contact surface 11 of the cam body 11
The lengthwise shape of a is formed to match the twist of rope n.

[Function] Figure 4 shows a state in which the rope shaft is fixed, and the pressure contact surface 11a of the cam body 11 is fitted and pressure-welded to the twisted portion 12a of the rope n, so the rope L is fixed. Even when towing in the direction of the arrow, the vehicle is not being towed.

Rotate the lever 13 in the direction of the arrow to remove the tip 13.
When a is pressed against the bottom surface of the fitting groove 14 on the back of the cam body 11, the cam weight 1 uses the pivot shaft as a fulcrum and rotates in the direction of the arrow against the spring 16, so that the fixation of the rope twist is released. Ru.

When the lever 13 is returned to its original position, the cam body 11 is rotated upward by the return force of the spring 16, and the pressure contact surface 11 is rotated upward.
At a, the rope ends are fitted and pressed together to fix the rope n.

〔Example〕

The rope support 10 is fixed between one end of two substrates 17 with several rivets, and the rope support 10 is made of stainless steel and made of lost wax, and its shape is circular. A concave bearing surface 10a is formed on the outer periphery of the bearing surface 10a, and a portion 101. of this bearing surface 10a is pressed against the rope. is formed directly into a linear shape.

The cam body 11 is also made of stainless steel and made of lost wax, and its rear end is pivotally connected to a pivot shaft installed between the base plates 17 in the middle.

Note that the rope support 10 and the cam body 11 may be made of a hard material, so there are no limitations on the material or manufacture thereof.

The rope n in the drawing is twisted in a normal cotton-like manner, so the shape of the pressure contact surface 11a of the cam body 11 is matched to this twist, but in the case of a braided rope, the pressure contact is It is preferable that the shape of the surface 11a is formed to match the knitted shape.

In the figure, W is a protrusion that also serves to prevent the cam body 11 from lateral wobbling and to stop the spring, J is a shaft hole, ■ is a stopper, and n is a connecting pin.

〔Effect of the invention〕

As described above, the pressure contact surface 11a of the cam body 11 is fitted and pressure welded to the twisted portion 12a of the rope, so that slipping of the rope n can be completely stopped. Even if the rope n is strongly pressed, there is no abrasion or damage to the rope n because it is pressed by the fit, and therefore the rope hill will not be worn or broken, so it can be used safely. It is also economical because it can be used for a long time and can be used for a long time.

In terms of structure, it is only necessary to form the shape of the pressure contact surface 11a of the cam body 11 to match the twist of the rope, so it can be mass-produced using lost wax, and has excellent features such as being able to provide the product at a correspondingly low price. It is something.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view showing the product of the present invention in use, FIG. 2 is a front view of the product, FIG. 3 is a plan view thereof, and FIG. is a front sectional view of the main part, 5th
The figure is a side sectional view thereof, and FIG. 6 is a perspective view of the cam body. 10... Rope support, 10 a... Support surface, 11
...Cam body, 11a...pressing surface, gentle...rope. Procedural amendment (touge)

Claims (1)

[Claims] 1. A rope fixing method in which a cam body is provided in pressure contact with a rope support body, and the rope is fixed by pressure contact between the support surface of the rope support body and the arcuate pressure contact surface of the cam body. In,
A rope characterized in that the shape of the pressure contact surface of the cam body in the length direction is formed in a shape that matches the twist of the rope, and the pressure contact surface of the cam body is fitted and press-welded to the twisted portion of the rope to fix the rope. Fixed method. 2. In a fixing fitting in which a cam body is in pressure contact with a rope support, and the rope is fixed by pressure contact between the support surface of the rope support and the arc-shaped pressure contact surface of the cam body, the pressure contact surface of the cam body A rope fixing fitting characterized in that the lengthwise shape of the rope is shaped to match the twisting of the rope.