JPS629006Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a wire tensioning device that allows the wire to be wound smoothly around the drum in a taut state, for example, when winding the wire around the drum of a winch or the like. be.

For example, when changing wires or tensioning wires on ridge change carts used in steel manufacturing processes, etc.
It is necessary to tension the wire by pulling it halfway toward the end, wind the free end side around a drum, and fix the end with a cotter, for example.

Conventionally, in order to tension the wire in the above-mentioned work, the wire was tied in the middle with one end of the small-diameter wire, and the chain block connected to the other end of the small-diameter wire was fixed to a suitable fixed part using a hook. Then, in this state, operate the chain block and pull the wire with a small diameter wire, and when the wire becomes tense, stop operating the chain block,
The loose end of the wire was wound around the drum by hand, and the end was fixed to the drum with a cotter or the like.

However, the method of tying and pulling small diameter wires is
This method has disadvantages in that slipping easily occurs at the bound portion between the small diameter wire and the wire, causing damage to the wire, and that reliable tension cannot be obtained, resulting in poor work efficiency.

Furthermore, when small diameter wires are used, the parts used for tying them become stiff and difficult to clean after use, making repair management difficult.

This invention was made to eliminate the above-mentioned drawbacks and problems, and it is possible to prevent slippage when tensioning the wire as much as possible, and also to prevent changes in the wire diameter. It is an object of the present invention to provide a wire tensioning tool that can be used in a wide range of situations and that can efficiently perform wire attachment and tensioning work.

The structure of this invention is that a pantograph mechanism is constructed by connecting a pair of clamping rods and two links in a pivotal manner, and one clamping rod is equipped with a wire pedestal, and the other clamping rod is connected to the pedestal. A clamping cam with a semicircular arc-shaped surface that clamps the wire is installed, and a guiding guide is provided between the clamping rod and the connecting parts on both sides of the link, so that the wire is clamped between the cradle and the clamping cam by pulling the end of the link. This is what I did.

This invention will be described below based on an embodiment shown in the accompanying drawings.

As shown in the figure, the wire tensioning device according to the present invention constitutes a pantograph mechanism 5 with a pair of clamping rods 1 and 2 and two links 3 and 4, and a pantograph mechanism 5 is constructed between each clamping rod and both pivot connecting parts of the link. , a guiding guide 6 is provided to guide the expansion and contraction movements of the pantograph mechanism 5.

One of the clamping rods 1 has an arm 7 protruding from the upper side edge of the tip, and a pedestal 8 having an L-shaped cross section is provided at the lower side edge, through which the wire A can pass. There is. Note that a non-slip member 9 is attached to the bottom surface of this pedestal 8, as shown in FIG.

The upper side edge of the tip of the other clamping rod 2 is connected to the arm 7 of one clamping rod 1 with a pivot 10, and the lower side edge facing onto the pedestal 8 has a clamping cam 11. is installed.

The clamping cam 11 has a semicircular arc surface 1 located below the pivot shaft 10 and centered at the link sides 3 and 4.
2, and a recessed groove 13 into which the wire A is fitted is formed on its outer periphery, as shown in FIG.

The semicircular arc surface 12 of this clamping cam 11 is
It corresponds to the bottom surface of the pedestal 8, and the wire A is inserted between it.

That is, when the clamping rods 1 and 1 approach each other, the semicircular arc-shaped surface 12 approaches the pedestal 8 and clamps the wire A.

Further, the tips of the links 3 and 4 are connected to the rear ends of the clamping rods 1 and 2 by pivots 14 and 15, respectively, and the rear ends of both links 3 and 4 are connected to each other by a pivot 16. A U-shaped ring 17 that connects to a chain block or the like is attached to the top.

Furthermore, the guiding guide 6 is formed of a vertically long plate 18 attached to a pivot shaft 14 connecting one of the clamping rods 1 and the link 3.
8 shows an elongated hole 19 into which the pivot shaft 15 connecting the other clamping rod 2 and the link 4 is slidably fitted, and the clamping interval between the clamping cam 11 and the pedestal 8 is indicated on the side edge of this elongated hole 19. A scale 20 is provided.

The wire tensioning device of this invention has the above-described configuration, and in order to tension the wire, the pantograph mechanism 5 is expanded to widen the gap between the clamping cam 11 and the pedestal 8, as shown in FIG. , insert the wire A between them, leaving the required length on the end side.

Thereafter, the pantograph mechanism 5 is contracted as shown in FIG. 1 by pulling the U-shaped ring 17 using, for example, a chain block, and the semicircular arc-shaped surface 12 of the clamping cam 11 rotated about the pivot shaft 10 and the pedestal. 8 and the bottom of the wire A.

Next, when the chain block connected to the U-shaped ring 17 is operated to pull the tensioning tool, the tensioning force is applied to the clamping cam 1.
1 and the pedestal 8, the wire A can be strongly pulled and tensed without slipping.

As described above, according to this invention, a pantograph mechanism is constructed by connecting a pair of clamping rods and two links, and one clamping rod has a wire holder, and the other clamping rod has a half that clamps the wire. Since the clamping cams each have an arcuate surface, a wire clamping force corresponding to the tensile force is generated between the clamping cam and the pedestal, and there is no slippage against the tension of the wire. Now it can be fully tensioned without causing damage due to slipping.
Wire installation work can now be done accurately.

Also, you get full tension of the wire, so
Wrapping and attachment of wire ends can be done more efficiently, and it can also accommodate a wide range of changes in wire diameter.

Furthermore, since an induction guide is attached to the pantograph mechanism, the wire clamping interval can be determined using this guide, and the optimal clamping force according to the wire diameter can always be confirmed, thereby avoiding unnecessary clamping force on the wire. This eliminates this problem and extends the life of the wire.

[Brief explanation of the drawing]

Figure 1 is a front view of the tensioning device according to this invention, Figure 2
The figure is an enlarged longitudinal sectional side view of the main parts of the same as above, and FIG. 3 is a front view showing the state in which the wire clamp of the tensioning tool is released. 1 and 2 are clamping rods, 3 and 4 are links, 5 is a pantograph mechanism, 6 is a guidance guide, 8 is a pedestal, 10,
14, 15, 16 are pivots, 11 is a clamping cam, 12
is an arcuate surface, 18 is a plate, 19 is a long hole, and 20 is a scale.

Claims (1)

[Scope of utility model registration request] A pantograph mechanism is constituted by a pair of clamping rods that are connected to each other by a pivot at their distal ends, and a pair of links whose distal ends are connected to the rear ends of each of the clamping rods by pivots, and whose rear ends are pivotally fixed to each other, A wire pedestal is provided at the tip of one of the clamping rods, and a wire pedestal is arranged below the tip of the other clamping rod so as to face the pedestal and to clamp the wire, and the wire pedestal is arranged at the tip of the other clamping rod so as to clamp the wire. A clamping cam with a semi-circular arc-shaped surface that is eccentric is provided,
The wire tensioning device is further characterized in that a guide guide is attached between the pivots on both sides connecting the two clamping rods and the link, the plate attached to one pivot having an elongated hole for movably holding the other pivot.